摘要
差动保护是变压器的主保护,它的误动将造成变压器的非正常停运,影响电力系统的发供电,甚至是造成系统振荡,对电力系统发供电的稳定运行是很不利的。针对一起在系统无故障冲击的情况下,变压器一次差动保护误动作的事故,介绍了事故的经过及保护的原理,分析了事故产生的技术原因,其主要是由变压器升高座CT的伏安特性不一致造成的,进行了理论验证,并提出相应的防范措施。
Differential protection is the primary protection of transformers. Its false tripping will cause transformers＇ abnormal outage to influence the production and supply of the power system and even cause oscillation of the system, which will definitely do harm to stable operation of the whole power system. Introduction was made to the process and protection principle of a transformer＇s differential protection malfunction incident under the conditions of fault-free impact on the system. The technical reasons of malfunction incident, mainly because of inconsistent voltage-current characteristics of the increase in seat transformer, were analyzed and the reasons were verified theoretically, the corresponding preventive measures proposed.
出处
《电工电气》
2010年第6期48-50,共3页
Electrotechnics Electric
关键词
主变
继电保护
误动
分析
main transformer
relay protection
false tripping
analysis
