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Ground-Fault Characteristic Analysis of Grid-Connected Photovoltaic Stations with Neutral Grounding Resistance

Author

Listed:
  • Zheng Li

    (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering of Chongqing University, Shapingba District, Chongqing 400044, China)

  • Jiping Lu

    (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering of Chongqing University, Shapingba District, Chongqing 400044, China)

  • Ya Zhu

    (Maintenance Branch of Chongqing Electric Power Company of (State Grid), No. 12 Zhongshan Road, Yuzhong District, Chongqing 400015, China)

  • Wang Jiang

    (Electric Power Research Institute of Chongqing Electric Power Company of (State Grid), Chongqing 401120, China)

Abstract

A centralized grid-connected photovoltaic (PV) station is a widely adopted method of neutral grounding using resistance, which can potentially make pre-existing protection systems invalid and threaten the safety of power grids. Therefore, studying the fault characteristics of grid-connected PV systems and their impact on power-grid protection is of great importance. Based on an analysis of the grid structure of a grid-connected PV system and of the low-voltage ride-through control characteristics of a photovoltaic power supply, this paper proposes a short-circuit calculation model and a fault-calculation method for this kind of system. With respect to the change of system parameters, particularly the resistance connected to the neutral point, and the possible impact on protective actions, this paper achieves the general rule of short-circuit current characteristics through a simulation, which provides a reference for devising protection configurations.

Suggested Citation

  • Zheng Li & Jiping Lu & Ya Zhu & Wang Jiang, 2017. "Ground-Fault Characteristic Analysis of Grid-Connected Photovoltaic Stations with Neutral Grounding Resistance," Energies, MDPI, vol. 10(11), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:11:p:1910-:d:119653
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    References listed on IDEAS

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    1. Das, Soubhagya K. & Verma, Deepak & Nema, Savita & Nema, R.K., 2017. "Shading mitigation techniques: State-of-the-art in photovoltaic applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 78(C), pages 369-390.
    2. Bana, Sangram & Saini, R.P., 2017. "Experimental investigation on power output of different photovoltaic array configurations under uniform and partial shading scenarios," Energy, Elsevier, vol. 127(C), pages 438-453.
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    Cited by:

    1. Huiyuan Liu & Kehan Xu & Zhe Zhang & Wei Liu & Jianyong Ao, 2019. "Research on Theoretical Calculation Methods of Photovoltaic Power Short-Circuit Current and Influencing Factors of Its Fault Characteristics," Energies, MDPI, vol. 12(2), pages 1-21, January.

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