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A Computational Equivalence-Based Unit Switching Circuit Method for Efficient Simulation of Multi-Converter Power Systems

Author

Listed:
  • Shuqing Zhang

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Qihang Wang

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Shaopu Tang

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Beila Deng

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Weijie Zhang

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Ruiqi Jiao

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Xiaoyu Sun

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

Abstract

The proliferation of power converters has posed significant challenges to the simulation of power grids. The unit switching circuit (USC) method provides an approach for power electronics grid simulation, but neglects the situation where the switching action time deviates from the time-step boundary. This article presents novel simulation and solving approaches for converters based on computational equivalence to precisely simulate the power electronics grid. This article also introduces a straightforward calculation method for determining equivalent circuit parameters through port quantity observation to achieve computational equivalence. The qualitative error analysis is given and accompanied by comprehensive discussions on its validity, numerical characteristics, and applicable scenarios. A case study is performed to verify the proposed method’s effectiveness and efficiency, yielding results that demonstrate improved accuracy.

Suggested Citation

  • Shuqing Zhang & Qihang Wang & Shaopu Tang & Beila Deng & Weijie Zhang & Ruiqi Jiao & Xiaoyu Sun, 2026. "A Computational Equivalence-Based Unit Switching Circuit Method for Efficient Simulation of Multi-Converter Power Systems," Energies, MDPI, vol. 19(16), pages 1-19, August.
    • Handle: RePEc:gam:jeners:v:19:y:2026:i:16:p:3740-:d:2011709
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