静止励磁系统中晶闸管损坏是常见故障之一,但造成晶闸管损坏的原因很多,如何根据一些故障现象找到晶闸管损坏的真正原因除要具备晶闸管的知识外,更需要一些晶闸管的使用经验,以避免相同故障的重复发生,甚至使事故扩大,维修成本增加。本文论述了静止励磁系统晶闸管选型设计时应注意的一些问题,分析了晶闸管损坏的原因,并提出了如何根据损坏后的晶闸管判断其损坏原因。 Thyristor damage in static excitation system is one of the common faults, but the causes of thyristor damage are many. How to find the true cause of thyristor damage according to some fault phenomena. Besides knowledge of thyristors, some experience of using thyristors is needed to avoid the same Recurrence of failures, or even to expand the accident, maintenance costs increase. This paper discusses some problems that should be paid attention to when designing thyristor of static excitation system, analyzes the reason of thyristor damage, and puts forward how to judge the cause of damage according to thyristor damaged.