Overvoltage of the Power System Integrated With High Proportion of Power Electronics Equipment (III): Mechanistic Analysis of Temporary Power Frequency Overvoltage Caused by DC Fault

被引：0
|
作者：
Wang S. [1 ]
Xu S. [1 ]
Sun H. [1 ]
Zhao B. [1 ]
Yi J. [1 ]
机构：
[1] China Electric Power Research Institute, Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2024年 / 44卷 / 08期
基金：
中国国家自然科学基金;
关键词：
calculation of maximum voltage; DC bipolar blocking fault; DC blocking after continuous commutation failure; renewable energy source; temporary power frequency overvoltage;
D O I：
10.13334/j.0258-8013.pcsee.222403
中图分类号：
学科分类号：
摘要：
With high share of renewable energy sources and large capacity of DC transmission projects, the problem of overvoltage has drawn more and more attention, which not only restricts the DC transmission capacity, but may also cause large-scale off-grid accidents of renewable energy sources. When the proportion of renewable energy is relatively high, compared with AC equipment, the renewable energy is more likely to face temporary power frequency overvoltage. This paper analyzes the overvoltage of sending end caused by DC fault. First, simplified equivalent circuits of UHVDC for delivery of renewable energy sources and traditional synchronous generators in fault state when HVDC bipolar blocking and HVDC blocks after continuous commutation failures occur are established. Then, based on the phasor relationship, the maximum overvoltage under DC bipolar blocking faults and DC blocking after continuous commutation failure is derived. Further, the influence of the power of HVDC transmission, the active power of renewable energy source, the parameter of low voltage ride through control, the electrical distance from the traditional synchronous generator to the DC converter station, the electrical distance from the renewable energy source to the DC converter station, and other factors on the terminal voltage of the renewable energy source are analyzed. Finally, PSD-BPA simulation software is used for simulation both in minor case and northwest equivalent grid to verify the validity of the theoretical analysis. ©2024 Chin.Soc.for Elec.Eng.
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页码：2990 / 3001
页数：11
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