In this paper, a coupling model of the AC filter branch circuit with the arc plasma in the circuit breaker was built to investigate the arcing process considering the harmonic current. The comparisons among the current at power frequency (50 Hz), power frequency combining the 11th harmonic and power frequency combining the 24th harmonic show that the high-order harmonic current would lead to higher decreasing rate of current before current-zero period. In addition, the influence of arc on the amplitude of high-order harmonic current is not negligible. Thus, the coupling of arc with AC filter branch circuit is quite necessary in the numerical modeling of the circuit breaker in the AC filter branch at the high voltage direct current converter station.

中文翻译：

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断开过程中SF 6断路器中交流滤波器分支的耦合模型

在本文中，建立了交流滤波器分支电路与断路器中电弧等离子体的耦合模型，以研究考虑谐波电流的电弧放电过程。在工频（50 Hz），工频结合11次谐波和工频结合24次谐波之间的比较表明，高次谐波电流将导致零电流周期之前电流的下降率更高。另外，电弧对高次谐波电流的幅度的影响是不可忽略的。因此，在高压直流换流站的交流滤波器分支中的断路器的数值模拟中，电弧与交流滤波器分支电路的耦合是非常必要的。