发变组断路器断口闪络保护改进措施
Hubei Electric Power(2021)
Abstract
通过主断路器断口闪络导致断路器爆炸的两个典型案例分析,认识闪络时电流电压变化特点.从理论上分析了闪络振荡最小电流,提出了闪络保护改进措施.建议增加500 kV和220 kV的断路器闪络失灵保护,可以在闪络后的两百多毫秒通过闪络失灵保护切除故障,有效减小断路器爆炸和主设备损坏的风险.
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