Cumulative Effect of Reignition Overvoltage Caused by Vacuum Circuit Breaker on Shunt Reactor Insulation in Offshore Wind Farm

IF 3.7 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Power Delivery Pub Date : 2025-02-17 DOI:10.1109/TPWRD.2025.3542392

Zhi Zheng;Yunzheng Chen;Xiao Zhong;Qingchuan Fan;Jiahao Zhang;Rong Wu;Xin Li;Qiuqin Sun

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Abstract

When vacuum circuit breaker (VCB) frequently interrupts shunt reactor (SR) in offshore wind farm (OWF), there is a large cumulative effect of reignition overvoltage. Firstly, an OWF model, which includes the SR model with distributed parameters and the VCB model considering arc reignition, is implemented in the environment of electromagnetic transient program (EMTP). Based on the theory of waveguide, the voltage distribution along the SR winding is analyzed. The influence of reignition number on the oscillation of voltage distribution is discussed. Then, the method for evaluating the strength of overvoltage cumulative effect is proposed based on the U-N curve of insulation breakdown. The results indicate that the weakness of insulation breakdown usually occurs in the middle of the winding. The performances of three overvoltage suppression measures in reducing cumulative effect are compared. A suggestion is provided to assist in selecting suitable device and prevent the hazards of overvoltage and its cumulative effect.

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真空断路器重燃过电压对海上风电场并联电抗器绝缘的累积影响

海上风电场真空断路器（VCB）频繁中断并联电抗器（SR）时，会产生较大的重燃过电压累积效应。首先，在电磁暂态程序（EMTP）环境下，建立了包含分布参数SR模型和考虑电弧重燃的VCB模型的OWF模型；基于波导理论，分析了沿SR绕组的电压分布。讨论了重燃次数对电压分布振荡的影响。在此基础上，提出了基于绝缘击穿U-N曲线的过电压累积效应强度评估方法。结果表明，绝缘击穿的弱点通常发生在绕组中部。比较了三种过电压抑制措施在减小累积效应方面的性能。提出了一些建议，以帮助选择合适的装置，防止过电压的危害及其累积效应。

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来源期刊

IEEE Transactions on Power Delivery 工程技术-工程：电子与电气

CiteScore

9.00

自引率

13.60%

发文量

513

审稿时长

6 months

期刊介绍： The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.