一台110kV主变事故分析──有载分接开关加束缚电阻改造  

Analysis of a 110kV Transformer Fault: Improvement of OLTC by Using Tie-in Resistance

作　　者：何勇[1] 吴锦华[2] 

机构地区：[1]台州电业局,浙江台州317000 [2]浙江省电力试验研究所,浙江杭州310014

出　　处：《变压器》2001年第6期38-41,共4页Transformer

摘　　要：全面分析了一台 110kV主变压器的事故原因。通过对修复后的变压器有载开关偏移电压的测量 ,发现有载开关偏移电压比标准值高了 6 0 %。针对此种情况 ,在现场进行了加束缚电阻改造 ,并对改造后的变压器进行了有载开关偏移电压测量 ,实测结果比标准值低了 41% ,改造效果明显。建议变压器例行试验和运行变压器应增加有载分接开关偏移电压测量项目。The reasons of a 110kV main transformer fault are analyzed thoroughly. The OLTC recovery voltage is measured after reparation. The results show that the recovery voltage is 60% higher than the standard value. After using the tie-in resistance, the measured recovery voltage is 41% lower than the standard value. The proposals for measurement of OLTC recovery voltage in transformer test and operation are made.

关 键 词：变压器 有载分接开关 调压绕组 束缚电阻 技术改造 

分 类 号：TM407[电气工程—电器]