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14 October 2021 Zero voltage ride through state judgement method for renewable power generation system based on terminal current
Chong Shao, Zhangpeng Zhou, Yunsong Yan, Honglei Xu, Yongan Shi, Guofeng Zhuang
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Proceedings Volume 11930, International Conference on Mechanical Engineering, Measurement Control, and Instrumentation; 1193013 (2021) https://doi.org/10.1117/12.2611032
Event: International Conference on Mechanical Engineering, Measurement Control, and Instrumentation (MEMCI 2021), 2021, Guangzhou, China
Abstract
As the “Double Carbon Goal” proposed in China, the renewable power generation system (RPGS) will further enhance the position in the grid. The construction of a panoramic monitoring system (PMS) for renewable power plants can better perceive the operating status of the unit. The existing grid-connected guidelines for photovoltaic (PV) systems require PV power stations to achieve 150ms on-grid operation when the voltage at the grid-connected point drops to zero. In addition, the need for zero voltage ride through (ZVRT) will also be proposed for the grid connection of future wind farms. However, when the grid-connection point voltage is zero, the active and reactive power of the generator terminal are both zero at this time. At present, the unit status detection mostly uses active/reactive power judgment, so it will misjudge the unit state in the ZVRT and offline state respectively, which will cause the fault expansion. In this paper, a method of using terminal current as state judgment is proposed by considering the ZVRT method. The ZVRT characteristics for RPGS are simulated by using MATLAB/Simulink to verify the proposed judgment method. The results show that state determine for RPGS by using the terminal current can improve the reliability of the panoramic monitoring system.
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Chong Shao, Zhangpeng Zhou, Yunsong Yan, Honglei Xu, Yongan Shi, and Guofeng Zhuang "Zero voltage ride through state judgement method for renewable power generation system based on terminal current", Proc. SPIE 11930, International Conference on Mechanical Engineering, Measurement Control, and Instrumentation, 1193013 (14 October 2021); https://doi.org/10.1117/12.2611032
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KEYWORDS
Photovoltaics
Renewable energy
Wind energy
Control systems
Panoramic photography
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