Features and Improvements
- Auxiliary Files (SCRIPT and DATA Sections): Added a new script command called "StopAuxFile". This command will effectively treat the remainder of the file after this command as a big comment. This includes any script commands inside the present SCRIPT block, as well as all remaining SCRIPT or DATA blocks.
- File Formats: When appending to an existing case using an EPC file or a RAW file, any new branches that are created are now flagged as having just been added. This flag is then used as part of the pre-processing feature in the power flow solution to automatically estimate appropriate voltage magnitudes and angles for any existing or new buses that become newly energized.
- Power Flow Solution: When pre-processing the voltage profile of a solution before solving, Simulator will now look at groupings of buses connected by very low impedances lines. If a bus in a grouping of energized buses has a zero voltage while other buses in the group do not, the zero voltage will be changed to the first non-zero voltage found in the grouping. This provides a much more reliable solution.
- PV and QV Curve (PVQV) Tool: Optimized the solution speed of the PV and QV curves tools. The QV curve especially should run much more quickly, especially on cases smaller than a few thousand buses.
- Transient Stability: Added an appropriate error message when the transient stability aborts due to a failed network equation solution.
- Transient Stability: Added read/write support for the LD1PAC load model, which is used to represent small air conditioner load.
- Transient Stability: Added full support to TGOV5 and set the defaults for boiler-follow control.
- Transient Stability: Added full support for the CSTATT static condensor model
- Auxiliary Files (SCRIPT and DATA Sections): Allow blank entries for custom expression variables. This is necessary so that when loading an auxiliary file that contains an existing custom expression the custom expression will end up being defined correctly if variables that previously existed should no longer exist.
- Auxiliary Files (SCRIPT and DATA Sections): Fixed editing of the switched shunt records for any of the special "EPC File" fields.
- Integrated Topology Processing (ITP): Fixed an error with defaulting that Allow Consolidation field of all branched back to YES whenever a DATA section for the BRANCH object type was read from an AUX file
- Transient Stability: When loading a PTI DYR file which contains GENCLS models, the Ra and Xdp values were not being automatically set to internal impedance values. This has been fixed.
- Transient Stability: Modified to prevent the network equation convergence tolerance from being set to a value smaller than 1E-5.
- Transient Stability: Fixed bug with CIM models in which they were not being autocorrected if Xl > Xpp
- Transient Stability: Removed limit check for generator impedance values since these values can differ substantially when MVA base for generator is set to the power flow base, as is common in older cases.