| |
|
|
>>
|
|
>>
|
|
|
What's in the Simulator 16 Patch?
Select one of the following links
to view descriptions of the changes incorporated via the PowerWorld Simulator
Patch files
|
|
View Change Descriptions by Date:
|
View All New Features/Improvements by Topic:
|
View All Bug Fixes by Topic:
|
| |
|
|
|
|
|
|
|
Top
New Features
- Transient Stability: Added support for line relays to have knowledge of which end of the line they refer to.
- Transient Stability: Implemented TLIN1 relay.
- Transient Stability: Added some Other Fields for ESAC8B.
Bug Fixes
- Power Flow Solution: Fixed potential power flow failure caused by multiple switched shunt regulating the same bus in a coordinated manner. This feature was new in Version 16 and did not work properly in all circumstances.
- Contingency Analysis: Fixed WhatActuallyOccurred so it makes sense with the use of dc power flow contingency analysis.
- Transient Stability: Fixed bug in setting Vsmin limit for WSCCST stabilizer when Vslow = 0.
- Transient Stability: Modified WSCCST so if Input Signal Code = 0 there is no input.
Return to Date List
New Features
- Auxiliary Files: Added new DATA object, DefDrawOneline, that will allow changing the default font (name, size, color, and style), option to use the default font size for all new text fields, and the default background color for oneline diagrams via an auxiliary file.
- Case Information Displays: Allow advanced filtering on the Modify/Create Limit Groups table of the Limit Monitoring Settings and Violations dialog. This also affects the LimitSet data object when using scripts.
- Case Information Displays: Added transformer fields on the transformer base to the Difference Flows base case to that they can be properly compared.
- Power Flow: Added VSC DC Line state to the system state that is used for restoring the last successful solution or state before a failed solution along with the contingency analysis, PVQV, ATC, and other reference states.
- Transient Stability: Added option to allow conversion of the composite load model (CMPLDW) to component parts for use in the power flow.
- Transient Stability: Added Alarm field to OEL1 model.
- Transient Stability: Added option to not flip machine saturation values when S12 < S1.
- User Interface Dialogs: Moved the option "Disable Transformer Tap Control if Tap Sens. is the Wrong Sign" from the Common Options to the Advanced Options tab of the Power Flow Solution options.
Bug Fixes
- Case Information Displays: Fixed a bug that would not allow a switched shunt to be created when pasting from Excel. The error indicated that all required fields were not present even though they were.
- Contingency Analysis: Fixed some bugs that would cause the Make-up Power grid on the Contingency Analysis dialog not to refresh correctly.
- Contingency Analysis: Fixed a bug that would change to the Results page on the Contingency Analysis dialog when making changes to other pages on the dialog.
- Contingency Analysis: Fixed a bug that would not show the entire description of What Actually Occurred on the Applied and Skipped Actions dialog.
- Distributed Computation: Fixed a bug that would cause authentication to fail when setting up the list of computers to use with Distributed Computing.
- Oneline Diagrams: Fixed a bug where the default oneline background color was not always updating properly.
- OPF: Fixed bug that would not show the OPF Options and Results dialog the first time that it is opened.
- Sensitivity Calculations: When calculating with Multiple Elements on the TLR Sensitivities form, the "Clear before Calculate" option is always set.
- Time Step Simulation: Fixed a bug that would produce an out of memory error when reading TSB files saved in version 15 or earlier of Simulator.
- Transient Stability: When loading in a GE DYD file, there is no longer the requirement that exciters be read before stabilizers.
- Transient Stability: Fixed reading in the GENCLS_PLAYBACK model from a GE DYD file.
- Transient Stability: Replace double quotes in the invocation section (identifier before the colon) of a GE DYD file with single quotes to handle bad file formats.
- Transient Stability: Corrected reading of the CMPLDW model so that the mvabase is read and stored.
- Transient Stability: Fixed writing IEEEG1_GE and ESST1A_GE to GE DYD file.
- Transient Stability: Modified handling of mechanical torque's speed dependence for MOTORW.
- Transient Stability: Fixed bug with EXAC8B correctly handling scaled Vrmin/Vrmax limits when Ta=0.
- Transient Stability: on ESAC7B set Vfemax to a minimum of 3 if it is greater than 0 and less than 3.
- Transient Stability: Added SMVABase parameter for CMPLDW.
- User Interface Dialogs: On the Branch Information dialog, show the impedances with 6 decimal places rather than 5. This fixes some potential issues when changing transformer base parameters.
Return to Date List
New Features
- Transient Stability: When converting composite load models (CMPLDW) to component parts, now have options for specifying whether the transformer or feeder will be added if impedances are zero. If they should be added, also have option to specify the non-zero impedances.
- Transient Stability: Added stabilizer output voltage to the Minimum/Maximum Values results table.
- Transient Stability: Added support for gain parameter Kdrp with machine model LCFB1.
Bug Fixes
- Contingency Analysis: Fixed a bug that would not allow the contingency specific solution options to load via an auxiliary file.
- Power Flow Solution: Fixed an access violation that could occur when solving the power flow after appending the case with a new closed branch.
- PV and QV Curve (PVQV) Tool: Fixed a bug that would not allow the QV specific solution options to load via an auxiliary file.
- Transient Stability: Fixed a problem that would not allow the block diagrams to load into Acrobat.
- Transient Stability: Models with blank IDs will be ignored.
- Transient Stability: Fixed bug in creating SMIB for multiple generator buses.
- Transient Stability: Fixed bug in ESAC7B in which Va was being multiplied by the compensated terminal voltage rather than the terminal voltage.
- Transient Stability: GENTPF/GENTPJ and GENCC ignore speed effects in the generator stator voltages.
- Transient Stability: Modified determination of fsrt for GGOV3 and corrected bug in which (1,1) point wasn't being added to GV/PGV curves for hydro units.
- Transient Stability: Modified GENTPF so saturation is considered on the q-axis for case with Tqop = 0.
- Transient Stability: Fixed bug in which the wrong exciter saturation curve was being used sometimes if E2 < E1.
Return to Date List
New Features
Bug Fixes
- Integrated Topology Processing: Fixed a bug that could move devices from their original buses to their pnodes following consolidation and deconsolidation.
Return to Date List
New Features
- Contingency Analysis: When using a Model Expression or Field to determine the Amount for the Action Type of a contingency action, a new option to Evaluate in the REference State has been added. When this option is in use the Amount will be determined from the reference state rather than the present contingency state.
- Contingency Analysis: A new option is available with Model Conditions to Disable if Condition is True in Contingency Reference State. A Model Filter will be disabled if all of its conditions are using this option and they evaluate to true in the contingency reference state. A Model Criteria that uses a Model Condition or Model Filter that has been disabled will not cause a contingency action to be implemented. A Model Filter will ignore any Model Conditions that have been disabled.
- Contingency Analysis: A new contingency action Status, TOPOLOGYCHECK, has been added. Any Model Criteria using this status will be evaluated, and if true the action will be implemented, after any CHECK actions and unconditional actions have been implemented but before the power flow is solved.
- Contingency Analysis: DC Converter contingency actions have been added.
- File Formats: Modified to add additional branch labels when reading Areva CSV file.
- General: Model Expressions now allow the use of Model Conditions and Model Filters.
- User Interface Dialogs: Allow voltage profile viewing of branches identified as breakers.
Bug Fixes
- File Formats: Modified the EPC version 18 format written from Simulator to more closely match the PSLF EPC written format.
- General: When double-clicking on a PWB file and opening Simulator, Simulator would fail to open a file if the filename contained successive spaces. This problem can be fixed by reinstalling Simulator from the installation file provided with the latest patch.
- Power Flow Solution: Fixed some errors that could occur when using line tapping in conjunction with lines marked as any of the zero impedance device types such as Breaker, Disconnect, ZBR, etc.
- Simulator Automation Server (SimAuto): Fixed an access violation that could occur when using the SimAuto function TSGetContingencyResults. This bug might simply cause an application to freeze or cause an error.
- Transient Stability: Fixed an access violation that could occur when using the SimAuto function TSGetContingencyResults. This bug might simply cause an application to freeze or cause an error.
Return to Date List
New Features
Bug Fixes
- File Formats: Under extremely rare circumstances a PWB file could be corrupted when writing. This could only happen if customized bus view options or customized sets of oneline display options had been created.
Return to Date List
New Features
- General: In the Model Filter Visualization, the text of the conditions and filters are now always black instead of using multiple colors to match the same conditions and filters.
- Oneline Diagrams: Added a shortcut with Line Flow Arrows to toggle the position of the text above and below the arrow. When the object is selected, Ctrl-D will toggle the text position.
Bug Fixes
- Contingency Analysis: When using the linear calculation method or full dc analysis, flows on interfaces containing branches with weighting factors other than 1 were not being calculated correctly. This has been fixed.
- File Formats: Fixed access violation that could occur when opening a PWB file created with old Simulator versions prior to version 11 and the case contained transactions between areas.
- File Formats: Fixed an access violation that could occur when saving a PWB file and model expressions contain unlinked variables.
- General: When equivalencing a case and choosing to convert shunts to loads, shunts could still result. This would occur when one of a phase shifter's terminals was in the study system and the other was in the external system. The bus not being equivalenced would have a shunt value and an equivalent load created. The sum of these was correct, but the allocation between the two was not. This has been fixed.
- Oneline Diagrams: In the custom color map that can be defined for contours, the Transparency field was backwards with NO meaning not transparent instead of YES. This has been fixed.
- Power Flow Solution: When loading in a case, it was possible that the Mvar output of a generator was not set exactly to one of the limits when the unit was marked as being at a limit. This would prevent the unit from ever moving even if it had range to move. This has been fixed.
- User Interface Dialogs: Increased the number of decimal places shown from 1 to 3 for the reactive capability curve points on the generator dialog.
Return to Date List
New Features
- File Formats: When loading in an auxiliary file, read the switched shunt regulation type field before the regulation range values because the regulation type will determine the units of the regulation range.
- General: Added more circular reference checking for Model Conditions, Model Filters, and Model Expressions.
- Oneline Diagrams: Added option in Simulator Options under Onelines --> Files --> Open Oneline Links By to specify if oneline links are to be opened by Number, Name_kV, or Label.
- PV and QV Curve (PVQV) Tool: Model Conditions and Filters that are part of contingency model criteria used during PV and QV analysis now allow use of the Model Condition option to Disable if Condition is True in Contingency Reference State.
- Transient Stability: Added a Transient Contingency option to set the per-unit resistance and reactance of an AC line or transformer.
Bug Fixes
- Case Information Displays: The option to visualize the Model Filter logic has been moved from the local menu under Insert Filter Logic to Model Filter Records --> Visualize Filter Logic.
- Distributed Computation: Fixed "invalid variant type" errors that would occur during distributed ATC. This was caused by Simulator attempting to distribute setup information that doesn't exist, i.e. blank extra monitors or interface rating scenarios. Simulator no longer attempts to send this information.
- General: When visualizing Model Filter logic and a circular reference is found, a graphical indication of the circular reference will be presented instead of a logic diagram.
- Oneline Diagrams: The ability to scroll and zoom on a oneline diagram could be lost after a message dialog appeared. This has been fixed.
- Power Flow Solution: It was possible for a generator that was not initially on AVR control to get pegged at a Mvar limit and never be allowed to move from the limit if it was set on AVR control. This has been fixed. This fix is related to the fix that was made with the Jan. 25, 2012 patch also related to generators being set at Mvar limits.
- Time Step Simulation: Fixed a bug that would not apply custom input values for buses.
- Transient Stability: Corrected LCFB1_PTI input parameters.
- Transient Stability: Fixed bug with EXAC3 in which initial Va limits were being modified based on the value of Vr. Now we use Va.
- User Interface Dialogs: When using the chooser display available on many dialogs to pick an object, switching between identifying the object by Name, Number, or Label should now keep the same object selected regardless of how it is being identified.
Return to Date List
New Features
Bug Fixes
- File Formats: An access violation could occur when reading in the IEEE Common Format due to transformers not having regulated buses defined. This has been fixed by no longer allowing tranformers to be on control if they do not have a regulated bus defined.
- Transient Stability: Fixed failure of network boundary equation solution when a DC line terminal has been de-energized due to line switching on the AC system. Previously, this would result in the transient stability aborting. It will now properly model the outage of the converter.
Return to Date List
New Features
- Oneline Diagrams: When specifying a Stub Size of 0 with Default Drawing Values for transmission lines, auto-inserted lines will be spaced appropriately at the bus instead of all being drawn from the middle of the bus.
- Transient Stability: Added option for Time to Begin Checking for Limit Monitors Results. This impacts when Transient Limit Monitors are actually monitored. Previously, Simulator would beginning monitoring these after the last event. Now the user can select to start monitoring after the last event, immediately at the start of the run, or at a custom time in seconds.
Bug Fixes
- File Formats: When loading the Areva hdbexport CSV file, CBType mapping was not working correctly. This has been fixed.
- File Formats: When loading in an EPC version 18 file with SVD data, fixed an error that was incorrectly loading the new fields in version 18.
- File Formats: When loading in an EPC file with strange characters in the Long ID field for transformers, correctly handle these characters so that the entire file is loaded.
- Oneline Diagrams: Fixed an access violation that could occur when modifying onelines via various display object dialog boxes.
- Sensitivity Calculations: When using the Advanced LODF Calculation, memory errors could result if monitoring a large number of branches and outaging a large number of branches. This has been fixed.
- Transient Stability: When loading in an auxiliary file with Transient Stability Contingencies, the Model Criteria was not getting populated correctly. This has been fixed.
- Transient Stability: After applying a fault on a device if a second fault was applied on the same device Simulator attempted to add the fault admittances together to model two simultaneous faults. This is of limited use, so Simulator has been changed to replace the existing fault (including admittance/impedance or fault location on a branch).
Return to Date List
New Features
Bug Fixes
- PV and QV Curve (PVQV) Tool: When enforcing MW limits with the ramping, it was possible that the source or sink could hit a min or max limit and the ramping would continue. This would result in the portion of the ramping that occurs after the limit is hit going to the system slack instead of the injection group that is at a limit. This problem would only occur if at least one generator in the affected injection group was within a very small tolerance of its limit in the base case. This has been fixed.
Return to Date List
New Features
- Transient Stability: Added option to save ALL of the two bus equivalents.
Bug Fixes
- Transient Stability: A transient contingency to close a switched shunt would not actually close the shunt. This has been fixed.
- User Interface Dialogs: When opening various dialogs, there may have been a flicker due to the dialog being created and filled with content. This flicker has been corrected.
Return to Date List
New Features
- Simulator Automation Server (SimAuto): The OpenOneline script command can be now be used to open onelines and associate them with a case even though the onelines cannot be viewed while running SimAuto. When a case is saved using SimAuto after onelines have been opened, the onelines will also be opened along with the case when the case is opened through the GUI.
- Transient Stability: When creating a two bus equivalent case, set the option for Save Results Every n Timesteps to 1.
Bug Fixes
- PV and QV Curve (PVQV) Tool: When saving QV results to file, some of the header and scenario information was corrupted. This has been fixed.
- Transient Stability: Fixed access violation that could occur when using the LD1PAC model.
Return to Date List
New Features
Bug Fixes
- File Formats: Additional problems have been encountered with the Long_ID fields for transformers containing invalid characters in an EPC file. Include some additional checks to try to prevent problems from these characters or write error messages to the log if the errors have not been handled and we end up not reading the remainder of the transformer data section.
- File Formats: When reading in DC lines in a RAW file, both identifying by number and name is now allowed if the RAW file version is less than version 31.
- Transient Stability: Fixed a bug with the MVA base When using the option to convert CMPLDW model to component parts. This could result in loads being initialized as negative when they should be positive.
- Transient Stability: There were errors implementing transient contingencies that opened either the near or far end of a line. These have been fixed.
Return to Date List
New Features
- Case Information Displays: Changed how Derived Status is determined. If Status = OPEN then Derived Status = OPEN else if breaker then Derived Status = CLOSED. If non-breaker shunt device (gen, load, or switched shunt) and a closed breaker is found by looking outward from the device terminal, a device is considered to be CLOSED. For a non-breaker branch, look from both terminals to determine if CLOSED, OPEN (no closed breaker at either terminal), OPEN FROM (closed breaker at to terminal only), or OPEN TO (closed breaker at from terminal only). Encountering a shunt device (gen, load, or switched shunt) when examining a branch will be considered the same as finding a closed breaker.
- Case Information Displays: Added ability to show substation latitude and longitude with generators, loads, and switched shunts.
Bug Fixes
- Transient Stability: Modified saving of transient results to hard drive so that if not enough hard drive space exists, the simulation gracefully aborts and an appropriate error message is shown.
- Transient Stability: When saving all two bus equivalent cases now just save one generator at a bus.
- Transient Stability: Fixed errors with how line relay models are read and written to DYD files when they are linked to multi-section lines.
- Transient Stability: Added ability to specify the "Device Location" for a line relay model in an AUX file.
- Transient Stability: TLIN1 relay model would cause a fatal error if the relay actually attempted to operate. This has been fixed.
- Transient Stability: Fixed an infinite loop that would result if attempting to edit Transient Limit Monitor data directly in the case information table.
Return to Date List
New Features
- Case Information Displays: Added Online field for dc lines and VSC dc lines.
- Case Information Displays: Added Derived Online field for branches, dc lines, and VSC dc lines. If Online = NO then Derived Online = OPEN, else Derived Online = Derived Status.
- Transient Stability: When choosing to begin checking for Limit Monitors Results after the last event, now have an option to specify a time delay after the last event at which to start checking.
Bug Fixes
Return to Date List
New Features
- Contingency Analysis: Now allow contingencies to be monitored as part of a Custom Monitor. Only the contingency fields for the contingency itself can be monitored for a given contingency.
- Transient Stability: Added option on the Results from RAM tab to Show Multiple Contingencies Events when Multiple Contingencies are being processed. If this option is checked, results for all contingencies will be shown in the Minimum/Maximum Values, Events, and Solution Details tabs.
- Transient Stability: Added Clear Results in RAM button on the Results from RAM tab. Clicking this will clear all of the results in Time Values.
Bug Fixes
- Case Information Displays: Fixed error when displaying some information for line shunts. The data was stored correctly, but some data could show up as blank in the case information display.
- General: Fixed errors when merging multi-section line sections. Extra line shunts were being created. The sum of the line shunts was correct, but there were too many individual line shunts. Only a single line shunt should exist at either or both ends of the merged line.
- Oneline Diagrams: Fixed an access violation that could occur when opening the Custom Hint Values dialog.
Return to Date List
New Features
- General: The substation for three-winding transformer star buses is automatically set to the same substation as the primary winding bus. The substation of the star bus cannot be edited by the user.
Bug Fixes
- General: Access violation could occur when unlocking the software. This has been fixed.
- Transient Stability: Allow TSR File Archiving to work again.
- Transient Stability: Bug fix in March 7, 2012 patch to force abort when running out of hard drive space was transient stability run to NOT abort in other situations that required it to abort. This has been fixed.
Return to Date List
New Features
- Bus View and Substation View Onelines: Modified the option for showing field labels so that it shows the column heading text of the field because this is much shorter.
- File Formats: Modified reading of the hdbexport CSV file to better handle records indices which are skipped.
- File Formats: When reading an EPC file and writing a message regarding a bypassed branch record we include R, X, and B values in the log message.
- Transient Stability: Modified showing of Results from RAM to better show results for multiple contingencies.
- Transient Stability: Modified the reading/writing of the WT3G and WT4G models from a DYD file so it read the Khv and Iolim fields. These fields are not used by Simulator, but that are read gracefully and written back out as well.
- Transient Stability: Modified the reading/writing of the WT3G and WT4G models from a DYD file so it read the Td field and uses it appropriately.
- Transient Stability: Modified the reading/writing of the WT4E model from a DYD file so it reads the ImaxTD and Viqlim parameters. Previously these were hard-coded to 1.7 and 1.6 always.
Bug Fixes
- Transient Stability: Modified reading the PTI DYR file so that it handles models written across multiple lines of a text file. Also modified so that we ignore an extra comma at the end of a DYR record.
- Transient Stability: Fixed an error in the AC7B exciter model with an incorrect sign on the derivative feedback block.
Return to Date List
New Features
Bug Fixes
Return to Date List
New Features
- Case Information Displays: Added Memo field for Model Conditions, Model Filters, and Custom Model Expressions.
- Fault Analysis: Can now optionally append sequence data when loaded from the Fault Analysis dialog. A prompt will be given to clear all sequence data first or append if opening an auxiliary file or a PTI *.seq file where the *.seq file contains a 0 indicator for new data. If the *.seq file contains a 1 indicating that data should be appended, no prompt is given and the data is just appended.
- File Formats: When loading in a PTI RAW file or PSLF EPC file, the participation factors of generators are now set to the PMax MW of the unit instead of the generator MVA Base.
- Oneline Diagrams: Added Center X/Longitude Location and Center Y/Latitude Location fields to the Display Explorer case information displays. These provide the center location of an object. Changing these values will update the X/Longitude and Y/Latitude fields.
Bug Fixes
- PV and QV Curve (PVQV) Tool: When using Integrated Topology Processing, checking for inadequate voltages, and excluding a bus because it is radial, the radial check is now done on the consolidated super bus instead of the original node.
- Transient Stability: Fixed potential error with initializing temperature control block that is at a limit for GAST2 and GASTWD governors.
- Transient Stability: For exciter EX2000, added initial limit violation correction for parameter RefLimP.
- Transient Stability: When converting the CMPLDW model to component parts for use in the power flow, the WSCC dynamics model for the static load component was not being correctly assigned. This has been fixed.
- Transient Stability: Fixed a List Out of Bounds error that could occur when running transient stability analysis with a case that contains more than one multi-terminal DC line.
Return to Date List
New Features
- Available Transfer Capability (ATC) Tool: Model Conditions and Filters that are part of contingency model criteria used during ATC analysis now allow use of the Model Condition option to Disable if Condition is True in Contingency Reference State.
- Available Transfer Capability (ATC) Tool: The option to evaluate Model Expressions or fields that are part of contingency actions in the contingency reference state is now used when running ATC analysis.
- File Formats: When loading an EPC file, the option for using GE Base Load Flag > 0 to prevent Post-CTG response in Simulator will now be used by default.
- PV and QV Curve (PVQV) Tool: When interpolating inadequate voltages during a PV run, now interpolate if an inadquate voltage occurs at the zero transfer level to determine the negative transfer level at which the voltage becomes inadequate.
Bug Fixes
- File Formats: When reading an EPC file, added checks to automatically ignore implicit generator step-up transformer if the hbus and tbus parameters are not specified.
- Transient Stability: Fixed potential problem that could occur when multiple events occur at the same time. The network equation Jacobian was not always being rebuilt when it should, resulting in bad solutions.
Return to Date List
New Features
- File Formats: When writing out to EPC files, save to version 18 by default.
- File Formats: The extra GE EPC fields are now always available with case information displays. The option for the user to specify this has been removed.
- File Formats: When reading a RAW file, comments for transformer records will now be added to the transformer Memo field.
- General: Allow the pre-filter option using Area/Zone/Owner filters to be used with Quick Filters.
Bug Fixes
- Contingency Analysis: When running contingency analysis, using a post-contingency auxiliary file, and using Integrated Topology Processing, access violations could result during or following contingency analysis. This has been fixed.
- Distributed Computation: Fixed a problem with the master instance of distributed contingency analysis where it wouldn't handle errors in remote machines properly, causing Simulator to instantly crash and disappear.
- Distributed Computation: Reduced memory usage required in distributed contingency analysis by incrementally processing results.
- File Formats: When appending EPC files that convert switched shunts to fixed shunts or vice versa and an existing shunt is first marked to be deleted and is then replaced with a new shunt, make sure that the Flagged for Delete field is set correctly.
- File Formats: When saving to EPC version 18 with a switched shunt that was originally identified as SVD type 5, 6, or 7, write out the original befmin and befmax stored with the GE extra data instead of the min and max Mvar of the switched shunt itself.
- Integrated Topology Processing: When running contingency analysis, using a post-contingency auxiliary file, and using Integrated Topology Processing, access violations could result during or following contingency analysis. This has been fixed.
- Oneline Diagrams: When displaying fields on a oneline in italics, some of the text could be clipped. This has been fixed.
- Oneline Diagrams: Using the substation renumbering tool was breaking the links between the oneline substation objects and data objects. This has been fixed.
Return to Date List
New Features
- Auxiliary Files (SCRIPT and DATA sections): Can now refer to custom fields (integers, singles, and strings) and calculated fields by name rather than number location of the field. Instead of using variablename:location can now use variablename:name. "BGCalcField:My calculated field name" and "CustomInteger:My custom integer name" are examples. Using this option for custom fields requires that field names be specified using the Custom Field Descriptions.
Bug Fixes
- Contingency Analysis: Using the DCConverter action and attempting to set the power or current setpoint for a voltage controlling converter will do nothing. Previously the voltage setpoint was incorrectly adjusted. If the control mode is changed for one converter from power to current or vice versa, the same change is made for the other converter that is not controlling voltage.
- File Formats: When loading multi-section lines from a PWB file, custom fields were not being retained and the metered end was not always set correctly. This has been fixed.
- Oneline Diagrams: When using the Select By Criteria dialog, previously selected layers were not always being retained correctly the next time that you open the dialog. This has been fixed.
- Oneline Diagrams: An access violation could result when attempting to tap a line connected to at least one substation. This has been fixed.
- Transient Stability: Fixed bug with setting the filename when using the TSGetResults script command. Instead of using the user-specified filename, the directory would be used instead as the filename.
- Transient Stability: Fixed memory leak when using the TSGetResults script command or TSGetContingencyResults SimAuto function.
- User Interface Dialogs: Fixed an access violation that could result when opening any dialog that contains an object chooser.
Return to Date List
New Features
- Auxiliary Files (SCRIPT and DATA sections): The text field for script command WriteTextToFile and the Header_Value_List for script command SaveDataWithExtra will now allow special keywords to specify date, time, and version. @BUILDDATE, @DATETIME, @DATE, @TIME, and @VERSION will be replaced with the appropriate values.
- Auxiliary Files (SCRIPT and DATA sections): New objecttype POWERWORLDSESSION is now available that will provide access to the Simulator executable currently being used. Use variablename VERSION to return just the executable version and VERSION:1 to return a string listing the add ons.
- Auxiliary Files (SCRIPT and DATA sections): New objecttype POWERWORLDSESSION provides access to a string containing the system slack buses. Use variablename BUSSLACK to return a string containing bus numbers and names of all system slack buses. Use variablename BUSSLACK:1 to return a string containing the system slack buses along with MW and Mvar ouptut values and minimum and maximum limits.
- Contingency Analysis: Overlap Gen MW field is now available with contingency records to list the total amount of overlapped gen when accounting for overlaps in injection group actions involving Set To and Change By actions of opening generators in merit order.
- Oneline Diagrams: Case Information Memo Text object now allows you to display system slack buses on a oneline diagram. The executable version information can be displayed as well. Currently, only the list of system slack buses without MW and Mvar information can be saved to the PWD, and only version information without the add ons can be saved.
Bug Fixes
- Contingency Analysis: When calculating OTDF values for contingency violations, report the PTDF value even if the OTDF ends up being zero. Previously, we were also reporting zero for the PTDF. The Contingency Violation List table will now automatically be refreshed when calculating OTDFs.
- Contingency Analysis: When using contingency analysis with topology processing it was possible for a non-primary bus to be reported as a low limit voltage violation if its superbus became disconnected during a contingency. This is no longer considered a violation and the bus will not be reported.
- Contingency Analysis: When using contingency analysis with topology processing, the option to only monitor the primary bus for each superbus was working in the opposite manner. If the option was NOT selected, only the primary bus for a superbus would be monitored. This has been fixed.
- File Formats: Problems could be encountered when loading text files with non-US English characters. This has been fixed.
- File Formats: When reading Areva CSV file, LN records that do not specify one end are ignored.
- General: Fixed a minor issue with switching away from and back to a dialog once it has been maximized. When you came back to the dialog it would no longer appear as if it was maximized.
- Integrated Topology Processing: When using contingency analysis with topology processing it was possible for a non-primary bus to be reported as a low limit voltage violation if its superbus became disconnected during a contingency. This is no longer considered a violation and the bus will not be reported.
- Integrated Topology Processing: When using contingency analysis with topology processing, the option to only monitor the primary bus for each superbus was working in the opposite manner. If the option was NOT selected, only the primary bus for a superbus would be monitored. This has been fixed.
- Oneline Diagrams: When selecting to delete multiple screen layers, only the objects of the first selected layer were being deleted. This has been fixed.
- Sensitivity Calculations: Fixed a bug calculating the contingent flow on an element for a line closure LCDF calculation when using the LODF calculation dialog when the Near Bus selected was not the line's From Bus. This bug did not affect contingency analysis, ATC, or other calculations where LCDFs are used. It only affected the flow displayed on the LODF dialog.
- Transient Stability: Fixed bug associated with exciter URST5T wind up limits.
- Transient Stability: Fixed issue with Vb limit for several exciters.
- User Interface Dialogs: On the bus and substation dialogs, allow the latitude and longitude values to be deleted.
Return to Date List
New Features
Bug Fixes
- Auxiliary Files (SCRIPT and DATA sections): Objecttype POWERWORLDSESSION provides access to a string containing the system slack buses. Variables for this object have been slightly modified since the April 26, 2012 patch. Now use variablename BUSSLACK:1 to return a string containing bus numbers and names of all system slack buses. Use variablename BUSSLACK to return a string containing the system slack buses along with MW and Mvar ouptut values and minimum and maximum limits.
Return to Date List
New Features
- Oneline Diagrams: Now have options with Screen Layers to Show All Layers or Hide All Layers.
- Oneline Diagrams: Modified how the list of Save View dropdown works. If a view is named using a back-slash, \, a subfolder will be created in the list of views. As an example, \New Folder\View Name, will create a subfolder with the name New Folder and this folder will contain the view with the name View Name.
Bug Fixes
- File Formats: When reading a PTI DYR file, do not write a message in the message log that the file reading has aborted because the file contains extra blank lines at the end.
- File Formats: Various issues have been encountered with EPC and RAW files due to non-Unicode files and system encoding. Previous patches have attempted to fix this but have ended up creating problems with different system encodings. Default system encoding will now always be used.
- File Formats: When loading in RAW, EPC, or AUX files, set the voltages at any radial buses to be the voltage of the bus at the other end of the radial branch as long as there is no shunt charging or conductance on the branch and there are no generators, loads, or shunts online at the radial bus. This is needed to prevent power flow convergence issues caused by bad voltages at these radial buses that are sometimes encountered when reading these text files.
- Transient Stability: When reading a PTI DYR file, do not write a message in the message log that the file reading has aborted because the file contains extra blank lines at the end.
- Transient Stability: For TLIN1 relay model, correctly trip only the first line segment between from bus and to bus when flag = 0 and nfar has been specified.
- Transient Stability: CIM5 and CIM6 models assigned to open loads could not be started once the loads were closed. This has been fixed.
Return to Date List
New Features
Bug Fixes
- Bus View and Substation View Onelines: If a oneline field contained an ampersand, text beyond the ampersand could be truncated. This has been fixed.
- File Formats: Fixed a bug created by the May 7, 2012 patch when setting the voltages of radial buses when loading in RAW, EPC, or AUX files. Voltages could be incorrectly set if the radial branch had a tap ratio <> 1, a phase shift <> 0, or magnetizing conductance or susceptance. Voltages could also be incorrectly set of the radial bus contained bus shunts. Incorrect voltages could cause the power flow not to converge. All of this has been fixed.
- Oneline Diagrams: If a oneline field contained an ampersand, text beyond the ampersand could be truncated. This has been fixed.
Return to Date List
New Features/Minor Improvements
:
Top
Auxiliary Files (SCRIPT and DATA Sections)
- (December 21, 2011) Added new DATA object, DefDrawOneline, that will allow changing the default font (name, size, color, and style), option to use the default font size for all new text fields, and the default background color for oneline diagrams via an auxiliary file.
- (April 19, 2012) Can now refer to custom fields (integers, singles, and strings) and calculated fields by name rather than number location of the field. Instead of using variablename:location can now use variablename:name. "BGCalcField:My calculated field name" and "CustomInteger:My custom integer name" are examples. Using this option for custom fields requires that field names be specified using the Custom Field Descriptions.
- (April 26, 2012) The text field for script command WriteTextToFile and the Header_Value_List for script command SaveDataWithExtra will now allow special keywords to specify date, time, and version. @BUILDDATE, @DATETIME, @DATE, @TIME, and @VERSION will be replaced with the appropriate values.
- (April 26, 2012) New objecttype POWERWORLDSESSION is now available that will provide access to the Simulator executable currently being used. Use variablename VERSION to return just the executable version and VERSION:1 to return a string listing the add ons.
- (April 26, 2012) New objecttype POWERWORLDSESSION provides access to a string containing the system slack buses. Use variablename BUSSLACK to return a string containing bus numbers and names of all system slack buses. Use variablename BUSSLACK:1 to return a string containing the system slack buses along with MW and Mvar ouptut values and minimum and maximum limits.
Return to Topic List
Available Transfer Capability (ATC) Tool
- (April 6, 2012) Model Conditions and Filters that are part of contingency model criteria used during ATC analysis now allow use of the Model Condition option to Disable if Condition is True in Contingency Reference State.
- (April 6, 2012) The option to evaluate Model Expressions or fields that are part of contingency actions in the contingency reference state is now used when running ATC analysis.
Return to Topic List
Bus View and Substation View Onelines
- (March 22, 2012) Modified the option for showing field labels so that it shows the column heading text of the field because this is much shorter.
Return to Topic List
Case Information Displays
- (December 21, 2011) Allow advanced filtering on the Modify/Create Limit Groups table of the Limit Monitoring Settings and Violations dialog. This also affects the LimitSet data object when using scripts.
- (December 21, 2011) Added transformer fields on the transformer base to the Difference Flows base case to that they can be properly compared.
- (March 7, 2012) Changed how Derived Status is determined. If Status = OPEN then Derived Status = OPEN. Otherwise, if a closed breaker or shunt device is found by looking outward from the device terminal, a device is considered to be Closed. If doing this for a non-breaker branch, look from both terminals to determine if CLOSED, OPEN (no closed breaker at either terminal), OPEN FROM (closed breaker at to terminal only), or OPEN TO (closed breaker at from terminal only).
- (March 7, 2012) Added ability to show substation latitude and longitude with generators, loads, and switched shunts.
- (March 9, 2012) Added Online field for dc lines and VSC dc lines.
- (March 9, 2012) Added Derived Online field for branches, dc lines, and VSC dc lines. If Online = NO then Derived Online = OPEN, else Derived Online = Derived Status.
- (April 4, 2012) Added Memo field for Model Conditions, Model Filters, and Custom Model Expressions.
Return to Topic List
Contingency Analysis Tool
- (January 12, 2012) When using a Model Expression or Field to determine the Amount for the Action Type of a contingency action, a new option to Evaluate in the REference State has been added. When this option is in use the Amount will be determined from the reference state rather than the present contingency state.
- (January 12, 2012) A new option is available with Model Conditions to Disable if Condition is True in Contingency Reference State. A Model Filter will be disabled if all of its conditions are using this option and they evaluate to true in the contingency reference state. A Model Criteria that uses a Model Condition or Model Filter that has been disabled will not cause a contingency action to be implemented. A Model Filter will ignore any Model Conditions that have been disabled.
- (January 12, 2012) A new contingency action Status, TOPOLOGYCHECK, has been added. Any Model Criteria using this status will be evaluated, and if true the action will be implemented, after any CHECK actions and unconditional actions have been implemented but before the power flow is solved.
- (January 12, 2012) DC Converter contingency actions have been added.
- (March 13, 2012) Now allow contingencies to be monitored as part of a Custom Monitor. Only the contingency fields for the contingency itself can be monitored for a given contingency.
- (April 26, 2012) Overlap Gen MW field is now available with contingency records to list the total amount of overlapped gen when accounting for overlaps in injection group actions involving Set To and Change By actions of opening generators in merit order.
Return to Topic List
Fault Analysis
- (April 4, 2012) Can now optionally append sequence data when loaded from the Fault Analysis dialog. A prompt will be given to clear all sequence data first or append if opening an auxiliary file or a PTI *.seq file where the *.seq file contains a 0 indicator for new data. If the *.seq file contains a 1 indicating that data should be appended, no prompt is given and the data is just appended.
Return to Topic List
File Formats
- (January 12, 2012) Modified to add additional branch labels when reading Areva CSV file.
- (February 3, 2012) When loading in an auxiliary file, read the switched shunt regulation type field before the regulation range values because the regulation type will determine the units of the regulation range.
- (March 22, 2012) Modified reading of the hdbexport CSV file to better handle records indices which are skipped.
- (March 22, 2012) When reading an EPC file and writing a message regarding a bypassed branch record we include R, X, and B values in the log message.
- (April 4, 2012) When loading in a PTI RAW file or PSLF EPC file, the participation factors of generators are now set to the PMax MW of the unit instead of the generator MVA Base.
- (April 6, 2012) When loading an EPC file, the option for using GE Base Load Flag > 0 to prevent Post-CTG response in Simulator will now be used by default.
- (April 10, 2012) When writing out to EPC files, save to version 18 by default.
- (April 10, 2012) The extra GE EPC fields are now always available with case information displays. The option for the user to specify this has been removed.
- (April 10, 2012) When reading a RAW file, comments for transformer records will now be added to the transformer Memo field.
Return to Topic List
General
- (January 12, 2012) Model Expressions now allow the use of Model Conditions and Model Filters.
- (January 25, 2012) In the Model Filter Visualization, the text of the conditions and filters are now always black instead of using multiple colors to match the same conditions and filters.
- (February 3, 2012) Added more circular reference checking for Model Conditions, Model Filters, and Model Expressions.
- (March 14, 2012) The substation for three-winding transformer star buses is automatically set to the same substation as the primary winding bus. The substation of the star bus cannot be edited by the user.
- (April 10, 2012) Allow the pre-filter option using Area/Zone/Owner filters to be used with Quick Filters.
Return to Topic List
Help
Return to Topic List
Integrated Topology Processing (ITP)
Return to Topic List
Model Explorer
Return to Topic List
Oneline Diagrams
- (January 25, 2012) Added a shortcut with Line Flow Arrows to toggle the position of the text above and below the arrow. When the object is selected, Ctrl-D will toggle the text position.
- (February 3, 2012) Added option in Simulator Options under Onelines --> Files --> Open Oneline Links By to specify if oneline links are to be opened by Number, Name_kV, or Label.
- (February 15, 2012) When specifying a Stub Size of 0 with Default Drawing Values for transmission lines, auto-inserted lines will be spaced appropriately at the bus instead of all being drawn from the middle of the bus.
- (April 4, 2012) Added Center X/Longitude Location and Center Y/Latitude Location fields to the Display Explorer case information displays. These provide the center location of an object. Changing these values will update the X/Longitude and Y/Latitude fields.
- (April 26, 2012) Case Information Memo Text object now allows you to display system slack buses on a oneline diagram. The executable version information can be displayed as well. Currently, only the list of system slack buses without MW and Mvar information can be saved to the PWD, and only version information without the add ons can be saved.
- (May 7, 2012) Now have options with Screen Layers to Show All Layers or Hide All Layers.
- (May 7, 2012) Modified how the list of Save View dropdown works. If a view is named using a back-slash, \, a subfolder will be created in the list of views. As an example, \New Folder\View Name, will create a subfolder with the name New Folder and this folder will contain the view with the name View Name.
Return to Topic List
OPF Reserves Tool
Return to Topic List
Optimal Power Flow (OPF)
Return to Topic List
Power Flow Solution
- (December 21, 2011) Added VSC DC Line state to the system state that is used for restoring the last successful solution or state before a failed solution along with the contingency analysis, PVQV, ATC, and other reference states.
Return to Topic List
PV and QV Curve (PVQV) Tool
- (February 3, 2012) Model Conditions and Filters that are part of contingency model criteria used during PV and QV analysis now allow use of the Model Condition option to Disable if Condition is True in Contingency Reference State.
- (April 6, 2012) When interpolating inadequate voltages during a PV run, now interpolate if an inadquate voltage occurs at the zero transfer level to determine the negative transfer level at which the voltage becomes inadequate.
Return to Topic List
Security Constrained OPF (SCOPF) Tool
Return to Topic List
Sensitivity Calculations
Return to Topic List
Simulator Automation Server (SimAuto)
- (February 27, 2012) The OpenOneline script command can be now be used to open onelines and associate them with a case even though the onelines cannot be viewed while running SimAuto. When a case is saved using SimAuto after onelines have been opened, the onelines will also be opened along with the case when the case is opened through the GUI.
Return to Topic List
Time Step Simulation
Return to Topic List
Transient Stability
- (December 8, 2011) Added support for line relays to have knowledge of which end of the line they refer to.
- (December 8, 2011) Implemented TLIN1 relay.
- (December 8, 2011) Added some Other Fields for ESAC8B.
- (December 21, 2011) Added option to allow conversion of the composite load model (CMPLDW) to component parts for use in the power flow.
- (December 21, 2011) Added Alarm field to OEL1 model.
- (December 21, 2011) Added option to not flip machine saturation values when S12 < S1.
- (January 3, 2012) When converting composite load models (CMPLDW) to component parts, now have options for specifying whether the transformer or feeder will be added if impedances are zero. If they should be added, also have option to specify the non-zero impedances.
- (January 3, 2012) Added stabilizer output voltage to the Minimum/Maximum Values results table.
- (January 3, 2012) Added support for gain parameter Kdrp with machine model LCFB1.
- (February 3, 2012) Added a Transient Contingency option to set the per-unit resistance and reactance of an AC line or transformer.
- (February 15, 2012) Added option for Time to Begin Checking for Limit Monitors Results. This impacts when Transient Limit Monitors are actually monitored. Previously, Simulator would beginning monitoring these after the last event. Now the user can select to start monitoring after the last event, immediately at the start of the run, or at a custom time in seconds.
- (February 23, 2012) Added option to save ALL of the two bus equivalents.
- (February 27, 2012) When creating a two bus equivalent case, set the option for Save Results Every n Timesteps to 1.
- (March 9, 2012) When choosing to begin checking for Limit Monitors Results after the last event, now have an option to specify a time delay after the last event at which to start checking.
- (March 13, 2012) Added option on the Results from RAM tab to Show Multiple Contingencies Events when Multiple Contingencies are being processed. If this option is checked, results for all contingencies will be shown in the Minimum/Maximum Values, Events, and Solution Details tabs.
- (March 13, 2012) Added Clear Results in RAM button on the Results from RAM tab. Clicking this will clear all of the results in Time Values.
- (March 22, 2012) Modified showing of Results from RAM to better show results for multiple contingencies.
- (March 22, 2012) Modified the reading/writing of the WT3G and WT4G models from a DYD file so it read the Khv and Iolim fields. These fields are not used by Simulator, but that are read gracefully and written back out as well.
- (March 22, 2012) Modified the reading/writing of the WT3G and WT4G models from a DYD file so it read the Td field and uses it appropriately.
- (March 22, 2012) Modified the reading/writing of the WT4E model from a DYD file so it reads the ImaxTD and Viqlim parameters. Previously these were hard-coded to 1.7 and 1.6 always.
Return to Topic List
User Interface Dialogs
- (December 21, 2011) Moved the option "Disable Transformer Tap Control if Tap Sens. is the Wrong Sign" from the Common Options to the Advanced Options tab of the Power Flow Solution options.
- (January 12, 2012) Allow voltage profile viewing of branches identified as breakers.
Return to Topic List
Bug Fixes:
Top
Auxiliary Files (SCRIPT and DATA Sections)
- (April 27, 2012) Objecttype POWERWORLDSESSION provides access to a string containing the system slack buses. Variables for this object have been slightly modified since the April 26, 2012 patch. Now use variablename BUSSLACK:1 to return a string containing bus numbers and names of all system slack buses. Use variablename BUSSLACK to return a string containing the system slack buses along with MW and Mvar ouptut values and minimum and maximum limits.
Return to Topic List
Available Transfer Capability (ATC) Tool
Return to Topic List
Bus View and Substation View Onelines
- (May 9, 2012) If a oneline field contained an ampersand, text beyond the ampersand could be truncated. This has been fixed.
Return to Topic List
Case Information Displays
- (December 21, 2011) Fixed a bug that would not allow a switched shunt to be created when pasting from Excel. The error indicated that all required fields were not present even though they were.
- (February 3, 2012) The option to visualize the Model Filter logic has been moved from the local menu under Insert Filter Logic to Model Filter Records --> Visualize Filter Logic.
- (March 13, 2012) Fixed error when displaying some information for line shunts. The data was stored correctly, but some data could show up as blank in the case information display.
Return to Topic List
Contingency Analysis
- (December 8, 2011) Fixed WhatActuallyOccurred so it makes sense with the use of dc power flow contingency analysis.
- (December 21, 2011) Fixed some bugs that would cause the Make-up Power grid on the Contingency Analysis dialog not to refresh correctly.
- (December 21, 2011) Fixed a bug that would change to the Results page on the Contingency Analysis dialog when making changes to other pages on the dialog.
- (December 21, 2011) Fixed a bug that would not show the entire description of What Actually Occurred on the Applied and Skipped Actions dialog.
- (January 3, 2012) Fixed a bug that would not allow the contingency specific solution options to load via an auxiliary file.
- (January 25, 2012) When using the linear calculation method or full dc analysis, flows on interfaces containing branches with weighting factors other than 1 were not being calculated correctly. This has been fixed.
- (April 10, 2012) When running contingency analysis, using a post-contingency auxiliary file, and using Integrated Topology Processing, access violations could result during or following contingency analysis. This has been fixed.
- (April 19, 2012) Using the DCConverter action and attempting to set the power or current setpoint for a voltage controlling converter will do nothing. Previously the voltage setpoint was incorrectly adjusted. If the control mode is changed for one converter from power to current or vice versa, the same change is made for the other converter that is not controlling voltage.
- (April 26, 2012) When calculating OTDF values for contingency violations, report the PTDF value even if the OTDF ends up being zero. Previously, we were also reporting zero for the PTDF. The Contingency Violation List table will now automatically be refreshed when calculating OTDFs.
- (April 26, 2012) When using contingency analysis with topology processing it was possible for a non-primary bus to be reported as a low limit voltage violation if its superbus became disconnected during a contingency. This is no longer considered a violation and the bus will not be reported.
- (April 26, 2012) When using contingency analysis with topology processing, the option to only monitor the primary bus for each superbus was working in the opposite manner. If the option was NOT selected, only the primary bus for a superbus would be monitored. This has been fixed.
Return to Topic List
Distributed Computation
- (December 21, 2011) Fixed a bug that would cause authentication to fail when setting up the list of computers to use with Distributed Computing.
- (February 3, 2012) Fixed "invalid variant type" errors that would occur during distributed ATC. This was caused by Simulator attempting to distribute setup information that doesn't exist, i.e. blank extra monitors or interface rating scenarios. Simulator no longer attempts to send this information.
- (April 10, 2012) Fixed a problem with the master instance of distributed contingency analysis where it wouldn't handle errors in remote machines properly, causing Simulator to instantly crash and disappear.
- (April 10, 2012) Reduced memory usage required in distributed contingency analysis by incrementally processing results.
Return to Topic List
Fault Analysis
Return to Topic List
File Formats
- (January 12, 2012) Modified the EPC version 18 format written from Simulator to more closely match the PSLF EPC written format.
- (January 13, 2012) Under extremely rare circumstances a PWB file could be corrupted when writing. This could only happen if customized bus view options or customized sets of oneline display options had been created.
- (January 25, 2012) Fixed access violation that could occur when opening a PWB file created with old Simulator versions prior to version 11 and the case contained transactions between areas.
- (January 25, 2012) Fixed an access violation that could occur when saving a PWB file and model expressions contain unlinked variables.
- (February 7, 2012) An access violation could occur when reading in the IEEE Common Format due to transformers not having regulated buses defined. This has been fixed by no longer allowing tranformers to be on control if they do not have a regulated bus defined.
- (February 15, 2012) When loading the Areva hdbexport CSV file, CBType mapping was not working correctly. This has been fixed.
- (February 15, 2012) When loading in an EPC version 18 file with SVD data, fixed an error that was incorrectly loading the new fields in version 18.
- (February 15, 2012) When loading in an EPC file with strange characters in the Long ID field for transformers, correctly handle these characters so that the entire file is loaded.
- (February 28, 2012) Additional problems have been encountered with the Long_ID fields for transformers containing invalid characters in an EPC file. Include some additional checks to try to prevent problems from these characters or write error messages to the log if the errors have not been handled and we end up not reading the remainder of the transformer data section.
- (February 28, 2012) When reading in DC lines in a RAW file, both identifying by number and name is now allowed if the RAW file version is less than version 31.
- (April 6, 2012) When reading an EPC file, added checks to automatically ignore implicit generator step-up transformer if the hbus and tbus parameters are not specified.
- (April 10, 2012) When appending EPC files that convert switched shunts to fixed shunts or vice versa and an existing shunt is first marked to be deleted and is then replaced with a new shunt, make sure that the Flagged for Delete field is set correctly.
- (April 10, 2012) When saving to EPC version 18 with a switched shunt that was originally identified as SVD type 5, 6, or 7, write out the original befmin and befmax stored with the GE extra data instead of the min and max Mvar of the switched shunt itself.
- (April 19, 2012) When loading multi-section lines from a PWB file, custom fields were not being retained and the metered end was not always set correctly. This has been fixed.
- (April 26, 2012) Problems could be encountered when loading text files with non-US English characters. This has been fixed.
- (April 26, 2012) When reading Areva CSV file, LN records that do not specify one end are ignored.
- (May 7, 2012) When reading a PTI DYR file, do not write a message in the message log that the file reading has aborted because the file contains extra blank lines at the end.
- (May 7, 2012) Various issues have been encountered with EPC and RAW files due to non-Unicode files and system encoding. Previous patches have attempted to fix this but have ended up creating problems with different system encodings. Default system encoding will now always be used.
- (May 7, 2012) When loading in RAW, EPC, or AUX files, set the voltages at any radial buses to be the voltage of the bus at the other end of the radial branch as long as there is no shunt charging or conductance on the branch and there are no generators, loads, or shunts online at the radial bus. This is needed to prevent power flow convergence issues caused by bad voltages at these radial buses that are sometimes encountered when reading these text files.
- (May 9, 2012) Fixed a bug created by the May 7, 2012 patch when setting the voltages of radial buses when loading in RAW, EPC, or AUX files. Voltages could be incorrectly set if the radial branch had a tap ratio <> 1, a phase shift <> 0, or magnetizing conductance or susceptance. Voltages could also be incorrectly set of the radial bus contained bus shunts. Incorrect voltages could cause the power flow not to converge. All of this has been fixed.
Return to Topic List
General
- (January 12, 2012) When double-clicking on a PWB file and opening Simulator, Simulator would fail to open a file if the filename contained successive spaces. This problem can be fixed by reinstalling Simulator from the installation file provided with the latest patch.
- (January 25, 2012) When equivalencing a case and choosing to convert shunts to loads, shunts could still result. This would occur when one of a phase shifter's terminals was in the study system and the other was in the external system. The bus not being equivalenced would have a shunt value and an equivalent load created. The sum of these was correct, but the allocation between the two was not. This has been fixed.
- (February 3, 2012) When visualizing Model Filter logic and a circular reference is found, a graphical indication of the circular reference will be presented instead of a logic diagram.
- (March 13, 2012) Fixed errors when merging multi-section line sections. Extra line shunts were being created. The sum of the line shunts was correct, but there were too many individual line shunts. Only a single line shunt should exist at either or both ends of the merged line.
- (March 14, 2012) Access violation could occur when unlocking the software. This has been fixed.
- (April 26, 2012) Fixed a minor issue with switching away from and back to a dialog once it has been maximized. When you came back to the dialog it would no longer appear as if it was maximized.
Return to Topic List
Help
Return to Topic List
Memory
Return to Topic List
Integrated Topology Processing (ITP)
- (January 6, 2012) Fixed a bug that could move devices from their original buses to their pnodes following consolidation and deconsolidation.
- (April 10, 2012) When running contingency analysis, using a post-contingency auxiliary file, and using Integrated Topology Processing, access violations could result during or following contingency analysis. This has been fixed.
- (April 26, 2012) When using contingency analysis with topology processing it was possible for a non-primary bus to be reported as a low limit voltage violation if its superbus became disconnected during a contingency. This is no longer considered a violation and the bus will not be reported.
- (April 26, 2012) When using contingency analysis with topology processing, the option to only monitor the primary bus for each superbus was working in the opposite manner. If the option was NOT selected, only the primary bus for a superbus would be monitored. This has been fixed.
Return to Topic List
Model Explorer
Return to Topic List
Oneline Diagrams
- (December 21, 2011) Fixed a bug where the default oneline background color was not always updating properly.
- (January 25, 2012) In the custom color map that can be defined for contours, the Transparency field was backwards with NO meaning not transparent instead of YES. This has been fixed.
- (February 3, 2012) The ability to scroll and zoom on a oneline diagram could be lost after a message dialog appeared. This has been fixed.
- (February 15, 2012) Fixed an access violation that could occur when modifying onelines via various display object dialog boxes.
- (March 13, 2012) Fixed an access violation that could occur when opening the Custom Hint Values dialog.
- (April 10, 2012) When displaying fields on a oneline in italics, some of the text could be clipped. This has been fixed.
- (April 10, 2012) Using the substation renumbering tool was breaking the links between the oneline substation objects and data objects. This has been fixed.
- (April 19, 2012) When using the Select By Criteria dialog, previously selected layers were not always being retained correctly the next time that you open the dialog. This has been fixed.
- (April 19, 2012) An access violation could result when attempting to tap a line connected to at least one substation. This has been fixed.
- (April 26, 2012) When selecting to delete multiple screen layers, only the objects of the first selected layer were being deleted. This has been fixed.
- (May 9, 2012) If a oneline field contained an ampersand, text beyond the ampersand could be truncated. This has been fixed.
Return to Topic List
OPF Reserves Tool
Return to Topic List
Optimal Power Flow (OPF)
- (December 21, 2011) Fixed bug that would not show the OPF Options and Results dialog the first time that it is opened.
Return to Topic List
Power Flow Solution
- (December 8, 2011) Fixed potential power flow failure caused by multiple switched shunt regulating the same bus in a coordinated manner. This feature was new in Version 16 and did not work properly in all circumstances.
- (January 3, 2012) Fixed an access violation that could occur when solving the power flow after appending the case with a new closed branch.
- (January 12, 2012) Fixed some errors that could occur when using line tapping in conjunction with lines marked as any of the zero impedance device types such as Breaker, Disconnect, ZBR, etc.
- (January 25, 2012) When loading in a case, it was possible that the Mvar output of a generator was not set exactly to one of the limits when the unit was marked as being at a limit. This would prevent the unit from ever moving even if it had range to move. This has been fixed.
- (February 3, 2012) It was possible for a generator that was not initially on AVR control to get pegged at a Mvar limit and never be allowed to move from the limit if it was set on AVR control. This has been fixed. This fix is related to the fix that was made with the Jan. 25, 2012 patch also related to generators being set at Mvar limits.
Return to Topic List
PV and QV Curve (PVQV) Tool
- (January 3, 2012) Fixed a bug that would not allow the QV specific solution options to load via an auxiliary file.
- (February 21, 2012) When enforcing MW limits with the ramping, it was possible that the source or sink could hit a min or max limit and the ramping would continue. This would result in the portion of the ramping that occurs after the limit is hit going to the system slack instead of the injection group that is at a limit. This problem would only occur if at least one generator in the affected injection group was within a very small tolerance of its limit in the base case. This has been fixed.
- (February 27, 2012) When saving QV results to file, some of the header and scenario information was corrupted. This has been fixed.
- (April 4, 2012) When using Integrated Topology Processing, checking for inadequate voltages, and excluding a bus because it is radial, the radial check is now done on the consolidated super bus instead of the original node.
Return to Topic List
Security Constrained OPF (SCOPF) Tool
Return to Topic List
Sensitivity Calculations
- (December 21, 2011) When calculating with Multiple Elements on the TLR Sensitivities form, the "Clear before Calculate" option is always set.
- (February 15, 2012) When using the Advanced LODF Calculation, memory errors could result if monitoring a large number of branches and outaging a large number of branches. This has been fixed.
- (April 26, 2012) Fixed a bug calculating the contingent flow on an element for a line closure LCDF calculation when using the LODF calculation dialog when the Near Bus selected was not the line's From Bus. This bug did not affect contingency analysis, ATC, or other calculations where LCDFs are used. It only affected the flow displayed on the LODF dialog.
Return to Topic List
Simulator Automation Server (SimAuto)
- (January 12, 2012) Fixed an access violation that could occur when using the SimAuto function TSGetContingencyResults. This bug might simply cause an application to freeze or cause an error.
Return to Topic List
Time Step Simulation
- (December 21, 2011) Fixed a bug that would produce an out of memory error when reading TSB files saved in version 15 or earlier of Simulator.
- (February 3, 2012) Fixed a bug that would not apply custom input values for buses.
Return to Topic List
Transient Stability
- (December 8, 2011) Fixed bug in setting Vsmin limit for WSCCST stabilizer when Vslow = 0.
- (December 8, 2011) Modified WSCCST so if Input Signal Code = 0 there is no input.
- (December 21, 2011) When loading in a GE DYD file, there is no longer the requirement that exciters be read before stabilizers.
- (December 21, 2011) Fixed reading in the GENCLS_PLAYBACK model from a GE DYD file.
- (December 21, 2011) Replace double quotes in the invocation section (identifier before the colon) of a GE DYD file with single quotes to handle bad file formats.
- (December 21, 2011) Corrected reading of the CMPLDW model so that the mvabase is read and stored.
- (December 21, 2011) Fixed writing IEEEG1_GE and ESST1A_GE to GE DYD file.
- (December 21, 2011) Modified handling of mechanical torque's speed dependence for MOTORW.
- (December 21, 2011) Fixed bug with EXAC8B correctly handling scaled Vrmin/Vrmax limits when Ta=0.
- (December 21, 2011) on ESAC7B set Vfemax to a minimum of 3 if it is greater than 0 and less than 3.
- (December 21, 2011) Added SMVABase parameter for CMPLDW.
- (January 3, 2012) Fixed a problem that would not allow the block diagrams to load into Acrobat.
- (January 3, 2012) Models with blank IDs will be ignored.
- (Jaunary 3, 2012) Fixed bug in creating SMIB for multiple generator buses.
- (Jaunary 3, 2012) Fixed bug in ESAC7B in which Va was being multiplied by the compensated terminal voltage rather than the terminal voltage.
- (Jaunary 3, 2012) GENTPF/GENTPJ and GENCC ignore speed effects in the generator stator voltages.
- (Jaunary 3, 2012) Modified determination of fsrt for GGOV3 and corrected bug in which (1,1) point wasn't being added to GV/PGV curves for hydro units.
- (Jaunary 3, 2012) Modified GENTPF so saturation is considered on the q-axis for case with Tqop = 0.
- (Jaunary 3, 2012) Fixed bug in which the wrong exciter saturation curve was being used sometimes if E2 < E1.
- (January 12, 2012) Fixed an access violation that could occur when using the SimAuto function TSGetContingencyResults. This bug might simply cause an application to freeze or cause an error.
- (February 3, 2012) Corrected LCFB1_PTI input parameters.
- (February 3, 2012) Fixed bug with EXAC3 in which initial Va limits were being modified based on the value of Vr. Now we use Va.
- (February 7, 2012) Fixed failure of network boundary equation solution when a DC line terminal has been de-energized due to line switching on the AC system. Previously, this would result in the transient stability aborting. It will now properly model the outage of the converter.
- (February 15, 2012) When loading in an auxiliary file with Transient Stability Contingencies, the Model Criteria was not getting populated correctly. This has been fixed.
- (February 15, 2012) After applying a fault on a device if a second fault was applied on the same device Simulator attempted to add the fault admittances together to model two simultaneous faults. This is of limited use, so Simulator has been changed to replace the existing fault (including admittance/impedance or fault location on a branch).
- (February 23, 2012) A transient contingency to close a switched shunt would not actually close the shunt. This has been fixed.
- (February 27, 2012) Fixed access violation that could occur when using the LD1PAC model.
- (February 28, 2012) Fixed a bug with the MVA base When using the option to convert CMPLDW model to component parts. This could result in loads being initialized as negative when they should be positive.
- (February 28, 2012) There were errors implementing transient contingencies that opened either the near or far end of a line. These have been fixed.
- (March 7, 2012) Modified saving of transient results to hard drive so that if not enough hard drive space exists, the simulation gracefully aborts and an appropriate error message is shown.
- (March 7, 2012) When saving all two bus equivalent cases now just save one generator at a bus.
- (March 7, 2012) Fixed errors with how line relay models are read and written to DYD files when they are linked to multi-section lines.
- (March 7, 2012) Added ability to specify the "Device Location" for a line relay model in an AUX file.
- (March 7, 2012) TLIN1 relay model would cause a fatal error if the relay actually attempted to operate. This has been fixed.
- (March 7, 2012) Fixed an infinite loop that would result if attempting to edit Transient Limit Monitor data directly in the case information table.
- (March 14, 2012) Allow TSR File Archiving to work again.
- (March 14, 2012) Bug fix in March 7, 2012 patch to force abort when running out of hard drive space was transient stability run to NOT abort in other situations that required it to abort. This has been fixed.
- (March 22, 2012) Modified reading the PTI DYR file so that it handles models written across multiple lines of a text file. Also modified so that we ignore an extra comma at the end of a DYR record.
- (March 22, 2012) Fixed an error in the AC7B exciter model with an incorrect sign on the derivative feedback block.
- (April 4, 2012) Fixed potential error with initializing temperature control block that is at a limit for GAST2 and GASTWD governors.
- (April 4, 2012) For exciter EX2000, added initial limit violation correction for parameter RefLimP.
- (April 4, 2012) When converting the CMPLDW model to component parts for use in the power flow, the WSCC dynamics model for the static load component was not being correctly assigned. This has been fixed.
- (April 4, 2012) Fixed a List Out of Bounds error that could occur when running transient stability analysis with a case that contains more than one multi-terminal DC line.
- (April 6, 2012) Fixed potential problem that could occur when multiple events occur at the same time. The network equation Jacobian was not always being rebuilt when it should, resulting in bad solutions.
- (April 19, 2012) Fixed bug with setting the filename when using the TSGetResults script command. Instead of using the user-specified filename, the directory would be used instead as the filename.
- (April 19, 2012) Fixed memory leak when using the TSGetResults script command or TSGetContingencyResults SimAuto function.
- (April 26, 2012) Fixed bug associated with exciter URST5T wind up limits.
- (April 26, 2012) Fixed issue with Vb limit for several exciters.
- (May 7, 2012) When reading a PTI DYR file, do not write a message in the message log that the file reading has aborted because the file contains extra blank lines at the end.
- (May 7, 2012) For TLIN1 relay model, correctly trip only the first line segment between from bus and to bus when flag = 0 and nfar has been specified.
- (May 7, 2012) CIM5 and CIM6 models assigned to open loads could not be started once the loads were closed. This has been fixed.
Return to Topic List
User Interface Dialogs
- (December 21, 2011) On the Branch Information dialog, show the impedances with 6 decimal places rather than 5. This fixes some potential issues when changing transformer base parameters.
- (January 25, 2012) Increased the number of decimal places shown from 1 to 3 for the reactive capability curve points on the generator dialog.
- (February 3, 2012) When using the chooser display available on many dialogs to pick an object, switching between identifying the object by Name, Number, or Label should now keep the same object selected regardless of how it is being identified.
- (February 23, 2012) When opening various dialogs, there may have been a flicker due to the dialog being created and filled with content. This flicker has been corrected.
- (April 19, 2012) Fixed an access violation that could result when opening any dialog that contains an object chooser.
- (April 26, 2012) On the bus and substation dialogs, allow the latitude and longitude values to be deleted.
Return to Topic List
|
|
|
|
|
|
