Features and Improvements
- Contingency Analysis Tool: Added support with LHVRT transient stability model to trip generators in the power flow (steady state) contingency analysis if the voltage thresholds of the LHVRT are met during the contingency process.
- Auxiliary Files (SCRIPT and DATA Sections): Fixed error with ":ALL" qualifier returning the number of fields for the Bus object BusMCMvarValue field. Also fixed and access violation associated with returning these values.
- Case Information Displays: The field (Contingency ResultsMaximum Loading) that reports the highest loading of a branch over all contingencies should be reported as a percentage. This has been fixed.
- File Formats: The number of Limit Groups that can be stored to a PWB file is limited to 127 in Simulator version 18. Reloading a PWB that was saved when more than 127 Limit Groups existed would result in objects being assigned to seemingly random Limit Groups. To correct this, any Limit Group beyond 127 will not be saved to the PWB and objects using these Limit Groups will be assigned to the Default Limit Group. Messages will be written to the log indicating which Limit Groups are not being saved to the PWB. Simulator version 19 will correct this problem completely and any number of Limit Groups can be saved.
- GIC: Fixed GIC bugs associated with pasting in electric field time points.
- PV and QV Curve (PVQV) Tool: Modified so that the name of the contingency is not included in the plot legend captions when creating a plot that only shows information for one contingency.
- Transient Stability: Modified so that the name of the contingency is not included in the plot legend captions when creating a plot that only shows information for one contingency.
- Transient Stability: Modified TLIN1 model so that multiple TLIN1 can be assigned to the same end of a branch. The Device ID must then be unique.
- Transient Stability: Modified how reading line relays assigned to sections of multi-section lines is done. Previously for any line relays for which the end of the branch to which the relay is assigned matters, Simulator would always assign the relay to either the first or last section of the multi-section line and the section number in the DYD file was ignored. This has been changed so that the section number is now read and the relay can be assigned to any section of the multi-section line. Note: this probably is not good practice in general as the tripping any section of a multi-section line will trip all of them so having a separate relay for every section is unnecessary.