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通过对某500 kV输电线路断路器取消合闸电阻的投切试验、断路器事故进行分析,并对此进行电磁暂态仿真计算,讨论了500 kV输电线路断路器取消合闸电阻的原则,与线路操作过电压幅值、线路两端高压并联电抗器配置情况的关系。研究结果表明,500 kV输电线路断路器合闸电阻配置时,需要考虑线路高压并联电抗器的配置情况,这将直接影响断路器断开的成功与否。
Through the switch test on a 500 kV transmission line circuit breaker, the circuit breaker accident is analyzed and the electromagnetic transient simulation is carried out. The principle of eliminating the closing resistance of 500 kV transmission line circuit breaker is discussed. Line operation over-voltage amplitude, high-voltage parallel reactors at both ends of the line configuration. The results show that the configuration of high voltage parallel reactors needs to be considered when configuring the closing resistance of circuit breakers in 500 kV transmission lines, which will directly affect the success of circuit breaker disconnection.