摘要
针对某电厂发电机出口20 kV干式电压互感器一次绕组匝间短路故障引起的机组运行异常问题,笔者根据电压互感器运行时出现的异常情况,建立绕组匝间短路等效电路模型,闸述了其等效参数的影响因素和特点,通过励磁电流测试和直流电阻测量等试验,分析了电压互感器出现故障的原因,并提出了相应的处理措施。实践证明,该发电机出口电压互感器匝间短路故障分析和处理方式能够保障发电机组安全稳定运行。
Aiming at the abnormality of the generator caused by primary winding between-turns short circuit in 20 kV potential transformer at the exit of the generator , the author establishes according to the abnormality, the equivalent model of between-turns short circuit, expounds the influential factors and characteristics of the equivalent the fault analysis and the treatment of potential transformer primary winding between-turns short circuit are able to guarantee the safe and stable operation of generator units.
出处
《黑龙江电力》
CAS
2014年第2期160-162,166,共4页
Heilongjiang Electric Power
关键词
干式电压互感器
一次绕组
绕组匝间短路
等效模型
dry type potential transformer
primary winding
between-turns short circuit
equivalent model
