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Research on Access Mode of the Flexible DC Power Distribution System into AC System

Author

Listed:
  • Yao Liu

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China
    Zhuhai Power Supply Bureau, Guangdong Power Grid Co., Ltd., Zhuhai 519000, China)

  • Jianfu Chen

    (Zhuhai Power Supply Bureau, Guangdong Power Grid Co., Ltd., Zhuhai 519000, China)

  • Lu Qu

    (State Key Lab of Power Systems (Department of Electrical Engineering), Tsinghua University, Beijing 100084, China
    DC Research Center, Energy Internet Institute, Tsinghua University, Beijing 100084, China)

  • Zhanqing Yu

    (State Key Lab of Power Systems (Department of Electrical Engineering), Tsinghua University, Beijing 100084, China
    DC Research Center, Energy Internet Institute, Tsinghua University, Beijing 100084, China)

  • Zipan Nie

    (State Key Lab of Power Systems (Department of Electrical Engineering), Tsinghua University, Beijing 100084, China
    DC Research Center, Energy Internet Institute, Tsinghua University, Beijing 100084, China)

  • Rong Zeng

    (State Key Lab of Power Systems (Department of Electrical Engineering), Tsinghua University, Beijing 100084, China
    DC Research Center, Energy Internet Institute, Tsinghua University, Beijing 100084, China)

Abstract

The connection mode of the direct current (DC) power distribution system and the alternating current (AC) system is the foundation of system design, and it is also one of key technologies of the DC power distribution network. Based on the topology structure, grounding method, main equipment parameters, load parameters and system control protection strategy of the DC power distribution system, this paper establishes the system simulation model in the case of configuring the connection transformer and not configuring the connection transformer. Simulation results show that, when no connecting transformer is installed, the interaction between AC and DC systems will be great when faults occur, and the cost of converter valves and DC reactors will be increased. When connecting transformers are installed, the interaction between AC and DC systems can be effectively isolated, and the operation reliability of the system will be greatly improved while the cost is saved. Therefore, it is recommended to configure an independent connection transformer in the DC distribution system.

Suggested Citation

  • Yao Liu & Jianfu Chen & Lu Qu & Zhanqing Yu & Zipan Nie & Rong Zeng, 2019. "Research on Access Mode of the Flexible DC Power Distribution System into AC System," Energies, MDPI, vol. 12(20), pages 1-15, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:20:p:4002-:d:278811
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    Cited by:

    1. Qingwen Peng & Lu Qu & Zhichang Yuan & Xiaorui Wang & Yukun Chen & Baoye Tian, 2021. "Optimal Scheduling Strategy of AC/DC Hybrid Distribution Network Based on Power Electronic Transformer," Energies, MDPI, vol. 14(11), pages 1-20, May.

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