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Research and Engineering Practice of Var-Voltage Control in Primary and Distribution Networks Considering the Reactive Power Regulation Capability of Distributed PV Systems

Author

Listed:
  • Haiyun Wang

    (State Grid Beijing Electric Power Company Electric Power Scientific Research Institute, Beijing 100075, China)

  • Qian Chen

    (State Grid Beijing Electric Power Company Electric Power Scientific Research Institute, Beijing 100075, China)

  • Linyu Zhang

    (School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China)

  • Xiyu Yin

    (School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China)

  • Zhijian Zhang

    (State Grid Beijing Electric Power Company Electric Power Scientific Research Institute, Beijing 100075, China)

  • Huayue Wei

    (State Grid Beijing Electric Power Company Electric Power Scientific Research Institute, Beijing 100075, China)

  • Xiaoyue Chen

    (School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China)

Abstract

To fully utilize the reactive power resources of distributed photovoltaic (PV) systems, this study proposes a coordinated var-voltage control strategy for the main distribution network, incorporating the reactive power regulation capability of distributed PV. Firstly, the Automatic Voltage Control (AVC) tertiary and secondary voltage control methods and optimization models in the main and distribution networks area are analyzed, and the physical equivalence of the reactive power compensation equipment involved is carried out. In this study, a coordinated local var-voltage control method is proposed, which integrates AVC primary voltage control and divides the control scheme into feeder and station areas, respectively. Through the analysis of actual operation cases in a regional power grid, the results demonstrate a reduction in network loss by 171.14 kW through voltage adjustment, validating the effectiveness of the proposed strategy. This method fully leverages the reactive power regulation capability of distributed renewable energy sources, reduces the operational frequency of reactive power equipment in substations, and synergizes with the AVC system to achieve optimal power grid operation.

Suggested Citation

  • Haiyun Wang & Qian Chen & Linyu Zhang & Xiyu Yin & Zhijian Zhang & Huayue Wei & Xiaoyue Chen, 2025. "Research and Engineering Practice of Var-Voltage Control in Primary and Distribution Networks Considering the Reactive Power Regulation Capability of Distributed PV Systems," Energies, MDPI, vol. 18(8), pages 1-17, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:8:p:2135-:d:1639029
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    References listed on IDEAS

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    1. Collins, L. & Ward, J.K., 2015. "Real and reactive power control of distributed PV inverters for overvoltage prevention and increased renewable generation hosting capacity," Renewable Energy, Elsevier, vol. 81(C), pages 464-471.
    2. Dimitrios Dimitropoulos & Xiongfei Wang & Frede Blaabjerg, 2023. "Stability Impacts of an Alternate Voltage Controller (AVC) on Wind Turbines with Different Grid Strengths," Energies, MDPI, vol. 16(3), pages 1-20, February.
    3. Huang, Nantian & Zhao, Xuanyuan & Guo, Yu & Cai, Guowei & Wang, Rijun, 2023. "Distribution network expansion planning considering a distributed hydrogen-thermal storage system based on photovoltaic development of the Whole County of China," Energy, Elsevier, vol. 278(C).
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