Abstract：Shunt reactor interruption by circuit breakers may produce current chopping and cause severe overvoltages. The four-legged reactor interrupting transients were elucidated with equivalent circuit analysis, and the mechanism of beat frequency oscillation was also characterized, further, a 3-D portfolio of the beat frequency, specifically regarding shunt reactor interrupting with either a short line distance or a long transmission line, was given to describe the variation trend versus the shunt reactor's parameters. Based on the available parameters from an installed 750kV transmission line in China, simulations of the four-legged reactor interruption process were carried out with adoption of an appropriate arc model for SF6 circuit breakers, and the scenario of the switching overvoltages was presented for two different kinds shunt reactor interrupting. The research results present useful reference for future construction and operation of the extra high voltage(EHV) and ultra high voltage(UHV) transmission lines.
孙秋芹, 李庆民, 王冠, 刘洪顺, 邹振宇. SF6断路器开断并联电抗器的截流过电压及其特性分析[J]. 电工技术学报, 2010, 25(2): 170-176.
Sun Qiuqin, Li Qingmin, Wang Guan, Liu Hongshun, Zou Zhenyu. Characteristic Analysis of the Shunt Reactor Switching Over-Voltages Interrupted by SF6 Circuit Breakers With Chopping Current. Transactions of China Electrotechnical Society, 2010, 25(2): 170-176.
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2010, Vol. 25 
