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Commits on Mar 24, 2024

• this is a released version. add function of changing dynamic simulation time step manually. stepspy is updated but not pushed to pypi due to token issue.

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Commits on Mar 19, 2024

• fix bug in SPARSE_MATRIX_CSPARSE introduced in +-*/ operation. Linearization of generator device is achieved but need tests.

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Commits on Mar 18, 2024

• update SSA and more work needed to compress matrix before it is used for operation.

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• change LINE in stepspy to AC LINE. but stepspy is not updated.

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Commits on Mar 13, 2024

• rename SOURCE_CONVERTER_MODEL to CONVERTER_MODEL. rename GFRMC_MODEL to VS_CONVERTER_MODEL. Add folder for future CS_CONVERTER_MODEL and LC_CONVERTER_MODEL.

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Commits on Mar 12, 2024

• Done rename LINE to AC_LINE. Including class definition and STEPS_AC_LINE enum. Functions for ac lines are updated except APIs.

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• Done renaming HVDC to LCC_HVDC2T. Most functions with _hvdc_ are renamed except those APIs. Rename header and source files of hvdc to lcc_hvdc2t. Change folder name of header and source files of HV…

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• Rename HVDC to LCC_HVDC2T. (1) Change class HVDC to LCC_HVDC2T. Change STEPS_HVDC to STEPS_LCC_HVDC2T. Change device type string from HVDC to 2T LCC HVDC. update interfaces from hvdc to 2t_lcc_hvdc…

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Commits on Mar 11, 2024

• add basic structure for energy storage related models.

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• reconstruct VSG by adding parent classes for building common converter models for SOURCE.

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• add pv and energy storage to dynamic Y matrix. add PV related models.

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• pass tests of sparse matrix plus, minus, multiply,divide, inverse. add matrix expand,shrink and change size functions.

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Commits on Mar 10, 2024

• add linearizatin of SEXS,GENSAL,IEEEG2,IEE2ST. add linearization interface for GENERATOR and LOAD. add main test for SSA.

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• change sparse matrix plus, minus, multiply, divide by removing dynamic memory allocation.

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• modify interfaces for small signal analysis in SG_MODEL, LOAD_MODEL, GENERATOR, LOAD. update implementatin of linearization in basic blocks.

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Commits on Mar 7, 2024

• update MULTI_POINT_LINE.

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• update MULTI_POINT_LINE. add WTVRTRLY1.

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Commits on Mar 4, 2024

• add wtvrt3 model but test not passed.

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• add initial PV relay and vrt models. move supported sg and wtg models from all_supported_models.h

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Commits on Mar 3, 2024

• WT3GX works. Previous problem was caused by failing to initialize wt_vrt_model in wt_generator as NULL. Need further tests for wt3gx.

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• update WT3FX model with VSG function. Test not passed.VRT models are updated but not tested In WT_GENERATOR, the number of lumped wtg is changed from integer to double, and need further check in WT…

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Commits on Feb 21, 2024

• add vrt_control_model, lvrt_control, hvrt_control, wtvrt3, and corresponding codes for adding wtvrt3 model. hvrt_model ad wtvrt3 models need further coding. parameter names in lvrt_control need fur…

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Commits on Feb 5, 2024

• minor

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• add MULTI_POINT_LINE, LVRT, HVRT models. rename VSG0 and VSG1 to VSCHVDCC1 and VSCHVDCC2 for VSC_HVDC models. rename VSCCONTROL0 to VSG0 for converter common models. remove attached device from METER.

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Commits on Jan 25, 2024

• add new VSG_MODEL2 and VSGCONTROL2 with different structure from VSG_MODEL and VSGCONTROL0. Pass test. Add WT3GX and need more work

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• add test for VSG related models. found some problems

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Commits on Jan 24, 2024

• add vsg_model and vsgcontrol model. not tested. need to rename VSG0 and VSG1 model for VSCHVDC

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Commits on Jan 23, 2024

• add PLL related models. Modify bus frequency model directory. Change WT3G0 model with new PLL mode. Not tested.

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Commits on Jan 8, 2024

• add block and generator model linearization interfaces.

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Commits on Jan 5, 2024

• V2.0.1. Fix bug in HVDC.cpp.

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Commits on Nov 21, 2023

• initialize adding interfaces to get linearized system variables for each elementary block. PID and second_order_block need further improvement since they need two states.

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Commits on Nov 2, 2023

• add function to check if NAN is detected in powerflow solver.

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Commits on Oct 16, 2023

• V2.0.0. Major version with short circuit analysis functions added. See Readme for more updates.

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• upgrade stepspy to 2.0.0

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• (1) Large time step simulation is implemented. Differentia and Lead-Lag blocks are implemented with simplifed LARGE TIME STEP MODE. (2) GENROU and GENSAL models are updated with FIRST ORDER BLOCK t…

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