摘要
介绍了某电厂220 MW机组在发电机并网升压时出现三相定子电流突升的异常现象,初步分析了电流突升原因。指出完成变压器直流电阻试验后,变压器铁芯存在严重的剩磁是引起定子电流突升的主要原因,并从理论上进行了探讨,最后提出了相应的解决办法。
An abnormal phenomenon of three-phase stator current surges in the 220MW unit of a power plant during the boost operation of generator synchronization is introduced, and the cause of current surge is preliminarily analyzed. It is pointed out that serious remanence in transformer core is the main cause of stator current surge after DC resistance test for transformer, which is discussed theoretically. Finally, the corresponding solutions are proposed.
作者
李振军
LI Zhenjun(Shenhua Guoneng Qinhuangdao Power Generation Co., Ltd., Qinhuangdao 066003, Hebei Province, China)
出处
《电力安全技术》
2019年第6期28-31,共4页
Electric Safety Technology
关键词
并网升压
定子电流
电流突升
boost operation of synchronization
stator current
current surge
