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Fault Seamless Self-Healing Method of Regional Distributed Network Based on the Cooperation of Source-Load-Storage

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  • Chengzhi Wei

    (National Electric Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha 410082, China
    Electric Power Research Institute of China Southern Power Grid, Guangzhou 510080, China)

  • Chunming Tu

    (National Electric Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha 410082, China)

  • Weiwei Song

    (School of Automation, Guangdong Polytechnic Normal University, Guangzhou 510665, China)

  • Fan Xiao

    (National Electric Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha 410082, China)

Abstract

The large-scale development of distributed generators poses challenges to the operation of distribution networks in remote areas. The power grid structure of the regional distributed networks in remote areas is relatively weak. When a fault occurs in the connecting channel, the regional distributed network may be separated from the main grid and become an island. Those distributed generators not only cannot maintain stable operation of the island but may lead to reclosing failure. This may lead to power interruption of important loads. Aiming at the demand for continuous power supply of important loads in regional distributed networks, a self-healing control method based on the cooperation of source-load-storage is proposed in this paper. The characteristics of the regional distributed network are analyzed first. A real-time island stability control method based on the operating conditions combined with regulation with tripping is proposed. This method comprehensively evaluates the self-healing ability of the regional distributed network after the island. The regulation strategy is adopted preferentially to realize the stable operation of the island without losing any load. When the regulation ability is insufficient, the strategy combines regulation and tripping. Considering the importance of load and source-load ratio, and according to the real-time power of each feeder, the optimal feeders are cut off. The purpose of island stability control of the regional distributed network was achieved. In this way, the load loss is minimized, and the speed of island re-connection to the grid is also accelerated. The seamless power supply of important loads in a regional distributed network is guaranteed. A complex Hardware-in-Loop simulation test platform of RTDS is built to verify the correctness of the proposed method.

Suggested Citation

  • Chengzhi Wei & Chunming Tu & Weiwei Song & Fan Xiao, 2023. "Fault Seamless Self-Healing Method of Regional Distributed Network Based on the Cooperation of Source-Load-Storage," Sustainability, MDPI, vol. 15(10), pages 1-16, May.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:10:p:8099-:d:1148281
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    References listed on IDEAS

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    1. Han, Ying & Yang, Hanqing & Li, Qi & Chen, Weirong & Zare, Firuz & Guerrero, Josep M., 2020. "Mode-triggered droop method for the decentralized energy management of an islanded hybrid PV/hydrogen/battery DC microgrid," Energy, Elsevier, vol. 199(C).
    2. Kougias, Ioannis & Szabó, Sándor & Monforti-Ferrario, Fabio & Huld, Thomas & Bódis, Katalin, 2016. "A methodology for optimization of the complementarity between small-hydropower plants and solar PV systems," Renewable Energy, Elsevier, vol. 87(P2), pages 1023-1030.
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