电瓷避雷器Issue(3)：43-50,8.DOI:10.16188/j.isa.1003-8337.2026.03.006
发电机出口电压互感器匝间短路电流特性及其在线监测研究
Interturn Short-Circuit Current Characteristics of Generator Output Voltage Transformer and Its On-Line Monitoring
摘要
Abstract
In response to the demand for warning of interturn short-circuit faults in generator output volt-age transformers(PT),the author studies the relationship between the primary side interturn short-cir-cuit current of PT and the number of short-circuit turns.An online monitoring and warning method for interturn short-circuit faults based on the primary side short-circuit current is proposed.Firstly,the current variation mechanism during PT interturn short-circuit was theoretically analyzed.Subsequently,PT test models with different short-circuit turns ratios were developed for experimentation,and the influ-ence of factors such as short-circuit turns ratio and external voltage on the primary current was obtained.An online monitoring method for PT interturn short-circuit faults based on primary current was estab-lished,and the measured results showed that the method could achieve a diagnostic accuracy of 0.01％for short-circuit turns ratio.We have developed an online monitoring system for PT interturn short-cir-cuit faults at the generator outlet based on a single current.The effectiveness of the system has been veri-fied through practical diagnosis on the generator outlet PT cabinet simulation test platform.This study can provide reference for monitoring and early warning of PT interturn short-circuit faults at the generator outlet,avoiding unplanned shutdowns of the generator set.关键词
发电机出口侧电压互感器/匝间短路/在线监测/故障诊断/短路电流Key words
generator output voltage transformer/interturn short-circuit/on-line monitoring/fault di-agnosis/short-circuit current引用本文复制引用
赵思洋,何文敏,刘兵,石龙,叶尔深·艾尔肯,郑宇..发电机出口电压互感器匝间短路电流特性及其在线监测研究[J].电瓷避雷器,2026,(3):43-50,8.基金项目
国家能源集团有限公司科技项目(编号:WH2022Y01).Project supported by Science and Technology Project of National Energy Group Co.,Ltd.(No.WH2022Y01). （编号:WH2022Y01）
