Software Patches

July 1, 2024

Bug Fixes

  • File Formats: Modified writing out RAW files with full-topology representation of substations to ensure IDs for switching devices are not changed.
  • GIC: For writing of transformer records to a RAW file + GIC file pair, the transformer data records will now match with the same key fields. Prior to this, a group of three 2-winding transformers connected topologically as a 3-winding transformer (but not explicitly defined as a 3-winding transformer), would have been written out as a 3-winding transformer in the GIC file, and written as separate 2-winding transformers in the RAW file. For such situations, both RAW and GIC files will now have the same the same key fields for the separate 2-winding transformers that are written out. In addition to writing out the GIC file differently, is now more robust to allow both 2-winding and 3-winding transformer records from a GIC file to be read regardless of whether it belongs to an underlying group of three 2-winding transformers or one 3-winding transformer.
  • Time Step Simulation: Improved Time Step Simulation for doing GIC calculations.
  • Transient Stability: Fixed a bug in which the Load Tripped and Load Model Tripped and Load Relay Tripped values shown wrong values in the Summary results section in the Simulation tab in transient stability. The simulation was running fine but those values were showing in correct results. Now those values match the MW Nominal Tripped values of the loads. If you add up all the field values of the MW Nominal Tripped values at the last time step and compare it with the total load tripped in the Summary results section, the results will be the same.