摘要
取消750kV线路AIS断路器和GIS断路器合闸电阻可节省费用,并提高断路器运行可靠性。研究了取消750kV交流输电线路断路器合闸电阻的可行性。提出了以线路的闪络率及避雷器能量作为取消750kV线路断路器合闸电阻的判据。介绍了线路闪络率的计算条件和方法,给出了取消合闸电阻后的750kV线路过电压水平和线路的绝缘水平以及几种限制过电压措施。
Eliminating pre-inset resistor of 750 kV AIS and GIS circuit breaker can save costs and increase operation stability. This article studied the possibility of eliminating 750 kV circuit breaker pre-inset resistor and presents that the flashover ratio and arrester energy of transmition line can be set as the eliminating 750 kV circuit breaker pre-inset resistor criterion. This article also introduces the calculation condition and methods of the transmition line flashover ratio. The over voltage level and the insulation level of 750 kV transnlition line as well as several methods of impress the switching over voltage are given when the pre-inset resistor is eliminated.
关键词
750
kV断路器合闸电阻
过电压
判据
闪络率
pre-inset resistor of 750 kV circuit breaker
over voltage
criterion
flashover ratio
