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Commits on Oct 16, 2023

• This is a temp commit. Large step simulation of differential and lead-lag blocks need further modification. In the next commit, the two blocks are simplified.

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Commits on Oct 13, 2023

• upload latest version of stepspy to pypi

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• 1) add option 'libsteps_file' to stepspy, enabling user to choose different libSTEPS library. 2)start to add large time step simulation support for differential block. however not finished. need fu…

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• add large time step simulation support for first order block

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• add BLOCK AUTOMATIC LARGE STEPS LOGIC option for toolkit. modify BLOCK class for further implementation of large step simulation.

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Commits on Oct 9, 2023

• add option CORRECT THREE WINDING TRANSFORMER IMPEDANCE LOGIC to toolkit. If enabled,winding leakage impedance nearly zero will be automatically set to 0+j0.001. Default is disabled.

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Commits on Aug 6, 2023

• fix two bugs. (1) add gear efficiency in WT Aerodynaic model when get available mechanical power from wind. (2) add get_buffer_value_at_tail in CONTNUOUS_BUFFER and fix bug in GAST2A and URCSCT.

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• add demo data of AERDF model and update its loading and saving Cp data functions.

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• fix bug in WT3E0 when frequency deadband is applied for intergral control

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• add variable KIPLL in WT3G0 and WT3G2, and fix bug when limiting with PLLmax and PLLmin

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Commits on Jun 30, 2023

• Added short-circuit calculation iteration function, but API and Python functions have not been added yet.

  Eric-wj

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• Add APIs of sequence current for reactive power compensation, lines, loads, generators, transformers, and wt generators; Add clear short circuit fault function, corresponding Python API has also be…

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Commits on Mar 4, 2023

• modified steps_seq2abc function and some variable names and function names

  Eric-wj

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Commits on Mar 1, 2023

• move supplement sequence model functions from sc solver to data importer. change some functions in sc solver. more check needed.

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Commits on Dec 2, 2022

• improve vsc-hvdc and new energy model.

  Eric-wj

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Commits on Sep 26, 2022

• fix bug in stepspy. push stepspy to pypi with new version 1.6.1

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• Add mutual data code and ordinary DC code to short circuit function.

  Eric-wj

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Commits on May 8, 2022

• Add motor load code to short circuit function.

  Eric-wj

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Commits on Apr 15, 2022

• Fix bug with generator reactance.

  Eric-wj

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Commits on Apr 13, 2022

• modify short circuit APIs name with sequence.

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• Add short circuit solver for AC system. APIs added. stepspy-dev updated.

  Eric-wj

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• v1.6.0. Release with tested VSC HVDC model. stepspy also updated.

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Commits on Apr 8, 2022

• update stepspy in folder stepspy-dev but havn't push to pypi. verify the new dll with IEEE9 and SD133 model. However, test with IEEE39 model with VSC failed. Need further check.

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Commits on Apr 7, 2022

• add VSG1 model and add voltage_frequency control module, the apis of VSC-HVDC has been completed and the correctness is verified!

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Commits on Feb 27, 2022

• powerflow with VSC-HVDC in voltage and angle control mode converged.

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Commits on Feb 24, 2022

• VSG0 model OK.

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Commits on Feb 23, 2022

• add VSG0 model. need tests. update VSC_HVDC_CONVERTER_MODEL

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Commits on Feb 21, 2022

• failed to set up f control simulation example

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Commits on Feb 20, 2022

• add DY_VSC_FREQUENCY_CONTROL. Test VSC_HVDC as dynamic voltage source to hold both frequency and ac voltage.

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Commits on Feb 19, 2022

• Great News. Major improvement. VSC_HVDC steady and dynamic model passed with powerflow and dynamic simulation. Need further verification and possible model reconstruction.

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• fix solve_steady_state in vsc_hvdc.cpp, a function need to finish in line3294

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Commits on Feb 18, 2022

• finish dynamic initialization and successfully run for several steps without event.VSC_HVDC device should be updated to set and get P2ac and Q2ac.

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• correct function calling sequence to aviod loop calling. move sove dynamic network of VSC to VSC_HVDC_NETWORK_MODEL.

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Commits on Feb 17, 2022

• add dq2ab transformation to utility

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• change some function name for easy to read

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