35kV电容式电压互感器故障原因分析  

Analysis of a 35kV Capacitive Voltage Transformer Fault

作　　者：黄燕珠[1] HUANG Yanzhu(Nanning Bureau,CSG EHV Power Transmission Company,Guangxi Nanning 530021,China)

机构地区：[1]中国南方电网责任有限公司超高压输电公司南宁局

出　　处：《广西电力》2019年第4期71-74,共4页Guangxi Electric Power

摘　　要：针对一起35 kV电容式电压互感器(CVT)二次电压异常及电磁单元发热故障进行分析。通过现场试验与分析,逐步排除电容分压器故障、中间变压器损坏、电容分压器二次接线端未地故障的可能性。最后结合解体检查结果,确定故障原因为阻尼电容器击穿损坏。为了提高CVT运行可靠性,从运行及预试维护等方面提出了防范措施。A fault of the abnormal secondary voltage and the heating of electromagnetic unit in a 35 kV capacitive voltage transformer(CVT)is analyzed.Based on field test and analysis,the possibility of the capacitor voltage divider fault,the damage of intermediate transformer and the ungrounded fault of the secondary terminal of the capacitor voltage divider are gradually eliminated.Finally,combined with the disassembly inspection results,it is determined that the fault reason is the breakdown damage of the damped capacitor.In order to improve the operation reliability of the CVT,precautions are proposed from aspects of operation and preventive test and maintenance.

关 键 词：电容式电压互感器(CVT) 谐振型阻尼器 速饱和型阻尼器 铁磁谐振 

分 类 号：TM451.2[电气工程—电器]