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Distributed Nodal Voltage Regulation Method for Low-Voltage Distribution Networks by Sharing PV System Reactive Power

Author

Listed:
  • Xiangdong Wang

    (Electric Power Research Institute of State Grid Hebei Electric Power Company, Shijiazhuang 050000, China)

  • Lei Wang

    (Electric Power Research Institute of State Grid Hebei Electric Power Company, Shijiazhuang 050000, China)

  • Wenfa Kang

    (Department of Electrical Engineering, Chongqing University, Chongqing 400044, China)

  • Tiecheng Li

    (Electric Power Research Institute of State Grid Hebei Electric Power Company, Shijiazhuang 050000, China)

  • Hao Zhou

    (Electric Power Research Institute of State Grid Hebei Electric Power Company, Shijiazhuang 050000, China)

  • Xuekai Hu

    (Electric Power Research Institute of State Grid Hebei Electric Power Company, Shijiazhuang 050000, China)

  • Kai Sun

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

Abstract

With the intensive integration of photovoltaic (PV) sources into the low-voltage distribution networks (LVDN), the nodal voltage limit violations and fluctuation problem cause concerns on the safety operation of a power system. The intermittent, stochastic, and fluctuating characteristics of PV output power leads to the frequent and fast fluctuation of nodal voltages. To address the voltage limit violation and fluctuation problem, this paper proposes a distributed nodal voltage regulation method based on photovoltaic reactive power and on-load tap changer transformers (OLTC). Using the local Q/V (Volt/Var) feedback controller derived from the grid sensitivity matrix, the voltage magnitude information is adopted to adjust the output of PV systems. Moreover, in order to share the burden of voltage regulation among distributed PV systems, a weighted distributed reactive power sharing algorithm is designed to achieve the voltage regulation according to the rated reactive power. Theoretical analysis is provided to show the convergence of the proposed algorithm. Additionally, the coordination strategy for distributed PV systems and OLTC is provided to reduce the reactive power outputs of PV systems. Five simulation case studies are designed to show the effectiveness of the proposed voltage regulation strategy, where the voltage regulation and proportional reactive power sharing can be achieved simultaneously.

Suggested Citation

  • Xiangdong Wang & Lei Wang & Wenfa Kang & Tiecheng Li & Hao Zhou & Xuekai Hu & Kai Sun, 2022. "Distributed Nodal Voltage Regulation Method for Low-Voltage Distribution Networks by Sharing PV System Reactive Power," Energies, MDPI, vol. 16(1), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:16:y:2022:i:1:p:357-:d:1018106
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    References listed on IDEAS

    as
    1. Qiangqiang Xie & Xiangrong Shentu & Xusheng Wu & Yi Ding & Yongzhu Hua & Jiadong Cui, 2019. "Coordinated Voltage Regulation by On-Load Tap Changer Operation and Demand Response Based on Voltage Ranking Search Algorithm," Energies, MDPI, vol. 12(10), pages 1-19, May.
    2. Kang, Wenfa & Chen, Minyou & Guan, Yajuan & Wei, Baoze & Vasquez Q., Juan C. & Guerrero, Josep M., 2022. "Event-triggered distributed voltage regulation by heterogeneous BESS in low-voltage distribution networks," Applied Energy, Elsevier, vol. 312(C).
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    Cited by:

    1. Tomasz Popławski & Sebastian Dudzik & Piotr Szeląg, 2023. "Forecasting of Energy Balance in Prosumer Micro-Installations Using Machine Learning Models," Energies, MDPI, vol. 16(18), pages 1-24, September.

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