When a broken line fault occurs, the break phase current drops to 0, the zero-sequence current rises, and the zero-sequence power is regarded as a positive direction. Therefore, based on the analysis of zero-sequence component, the relay protection is available to accurately identify the broken line fault and trip, thus preventing the line from open-phase operation. Taking a broken line fault as an example, the identification and action process of zero-sequence protection in the broken line fault are analyzed so as to benefit the relay protection personnel to make timely judgment and disposal of a trip accident in the power grid.
关键词
断线故障/零序分量/继电保护/零序保护
Key words
broken line fault/zero-sequence component/relay protection/zero-sequence protection
维普
万方数据