Features and Improvements
- Fault Analysis: Added fields for displaying subtransient fault currents.
- Power Flow Solution: When Simulator automatically picks a slack bus for an island, a generator that is regulating a bus outside the island will be picked as a last resort and set to regulate its own terminal. Previously, any generator not regulating a bus inside the island would be ignored which could result in an island not being viable even if it has generation.
- Transient Stability: Added the MTDC_PDCI, CONV_CELILO, CONV_CELILO_N, and CONV_SYLMAR dynamic models. There is an option for these models to be automatically added if the PDCI model exists in the base case.
- Contingency Analysis: Modified the accounting of gen drop overlap so that the total amount of overlap does not include multiple counting of overlap that applies to multiple injection groups. Overlap is only counted as generators are processed in merit order.
- General: Fixed a bug that would not apply the NOT condition correctly for Model Conditions or Model Filters that are part of a Model Filter. This could occur if the Model Filters were loaded more than once from either a PWB or an auxiliary file.
- Integrated Topology Processing (ITP): When using Integrated Topology Processing and solving a consolidated case, skip using the optimal multiplier for the first inner loop iteration after generator adjustments have been made. This should help convergence in situations in which the optimal multiplier is very small and the power flow is very slow to converge.
- Oneline Diagrams: Fixed text fields with spinners so that they draw properly when background fill is also used.
- Oneline Diagrams: Fixed an access violation that could occur when opening the Save View dialog.
- Oneline Diagrams: Fixed GPU contouring bug to support older video cards.
- Power Flow Solution: Fixed an access violation that could occur in the angle smoothing process when closing in a series of branches.
- Power Flow Solution: When using Integrated Topology Processing and solving a consolidated case, skip using the optimal multiplier for the first inner loop iteration after generator adjustments have been made. This should help convergence in situations in which the optimal multiplier is very small and the power flow is very slow to converge.
- Power Flow Solution: Fixed an error with generator AVR control when there are multiple generators at the same bus on AVR control and at least one of the generators does not have a viable path to the bus it is regulating. In certain situations, the regulated bus would be selected as the bus that does not have a viable path resulting in a failed power flow solution. This has been fixed so that the regulated bus is selected as a bus that has a viable path from the generator to the regulated bus.
- Time Step Simulation: Custom Input field values can now be pasted from Excel into the appropriate tables.
- Time Step Simulation: Fixed bug in handling of LL limits for ESAC6A, EXAC6A, and EXIVO exciters.
- Transient Stability: Fixed error with reading the MVA base for wind turbines from GE DYD file. Previously for WT4G, WT3G, GENWRI, GENWTG, etc. the MVA base in the DYD file was being ignored.