大容量发电机断路器短路试验程序分析与讨论

Analysis on Short Circuit Test Program of Circuit Breaker for Large Capacity Generator

随着中国电力工业的不断发展,大容量发电机断路器的研究也走向更高的容量等级,容量试验是发电机断路器研究、开发过程中必备的关键性环节。鉴于国家标准GB/T 14824—2008《高压交流发电机断路器》相对于当前的试验需求的不足,文中在研究即将颁布的国际标准IEC/IEEE 62271-37-013:2014(草案版)的基础上,分析与讨论了发电机断路器的短路故障、短路试验程序、以及与输配电高压交流断路器短路故障的区别,最后介绍与分析了XIHARI大容量试验站进行额定电压24 kV、额定短路开断电流160 k A的发电机断路器(型号为ZHN10-24/Y25000-160)合成试验回路原理及典型的短路电流开断示波图。文中的研究内容为发电机断路器短路故障开断、关合试验提供了参考与依据。

With the increase in capacity of large capacity generator circuit breakers, the existing national standard GB/T 14824-2008 ＂High Voltage AC Generator Circuit Breaker＂ is insufficient to the short circuit test. In this paper, the short circuit test program for large capacity generator circuit breakers is analyzed based on the international standard IEC/IEEE 62271-37-013：2014（draft version）, and the difference of short circuit faults between the generator circuit breaker and the high voltage circuit breaker in power transmission and distribution is discussed. In addition, synthetic test of a generator circuit breaker（ZHN10-24/Y25000-160）was conducted on the XIHARI large capacity test platform with rated voltage 24 kV and short circuit breaking current 160 kA, and the test circuit prin-ciple and typical short circuit switching waveform are introduced.