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Research on Fault Identification of Hybrid Multi-Feed High-Voltage Direct Current System Based on Line Commutated Converter and Voltage Source Converter

Author

Listed:
  • Ting Wang

    (State Grid Hubei Electric Power Research Institute, 227 Xu Dong Street, Wuhan 430077, China)

  • Kun Chen

    (State Grid Hubei Electric Power Research Institute, 227 Xu Dong Street, Wuhan 430077, China)

  • Long’en Zhang

    (State Grid Hubei Electric Power Research Institute, 227 Xu Dong Street, Wuhan 430077, China)

  • Xingyang Hu

    (State Grid Hubei Electric Power Research Institute, 227 Xu Dong Street, Wuhan 430077, China)

  • Hengxuan Li

    (State Grid Hubei Electric Power Research Institute, 227 Xu Dong Street, Wuhan 430077, China)

  • Pangqi Ye

    (State Grid Hubei Electric Power Research Institute, 227 Xu Dong Street, Wuhan 430077, China)

Abstract

With the rapid development of voltage source converter (VSC) and line commutated converter (LCC) technology and the relative concentration of power and load, the inverter station of the flexible DC system is fed into the same AC bus with the conventional DC rectifier station, and the high-voltage direct current (HVDC) parallel hybrid feed system is formed in structure. As the electrical distance between the converter stations is very close, when a fault occurs in the near area, the current on the AC wiring on the VSC side will fluctuate greatly, resulting in the misoperation of the AC wiring protection. For this reason, this paper proposes a fault identification method based on VSC/LCC hybrid multi-fed HVDC system, which discriminates the fault and outputs the protection signal according to the protection criterion, and logically judges the combination of the output protection signal to identify the fault type. The simulation results show that the method can identify all kinds of faults of hybrid multi-feed DC system and solve the problem of protection misoperation of the hybrid multi-feed DC system.

Suggested Citation

  • Ting Wang & Kun Chen & Long’en Zhang & Xingyang Hu & Hengxuan Li & Pangqi Ye, 2024. "Research on Fault Identification of Hybrid Multi-Feed High-Voltage Direct Current System Based on Line Commutated Converter and Voltage Source Converter," Energies, MDPI, vol. 17(9), pages 1-17, May.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:9:p:2215-:d:1388596
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