摘要
某500kV变电站新扩建主变启动试运行时,低压侧电容器组投入后发生过电压保护动作跳闸,经现场检查,初步推测该主变可能存在器件连接错误问题。为了验证该推测的正确性,采用PSCAD/EMTDC仿真软件搭建系统各相关元件的模型,对投入电容器组后的系统运行电压情况进行数值计算与仿真分析。最后,为了防止此类故障再次发生,提出了应对措施。
During the start-up and trial operation of the extension of main transformer in a 500 kV substation,the overvoltage protection tripping action happened after the low voltage side capacitor bank was put into operation.By field inspection,it is preliminarily speculated that the main transformer has wrong component connections problem.In order to verify the correctness of the speculation, the models of every relevant components of the system are built by PSCAD/EMTDC simulation softerware.The system operation voltage after the capacitor bank was put into operation is numerically calculated,simulated and analyzed.Finally,corresponding measures are proposed to prevent such faults from happening again.
作者
曾星宏
莫富钧
阳育德
ZENG Xinghong;MO Fujun;YANG Yude(Nanning Bureau,CSG EHV Power Transmission Company,Guangxi Nanning 530028,China;College of Electrical Engineering,Guangxi University,Guangxi Nanning 530004,China)
出处
《广西电力》
2019年第3期40-44,共5页
Guangxi Electric Power