110kV变压器直流电阻试验数据异常缺陷分析

Causes Analysis on 110kV Transformer DC Resistance Test Data Anomalies

针对1台110kV变压器有载分接开关缺陷导致的直阻超标的问题,通过电气试验和内部检查分析,认为有载分接开关的极性转换开关与极性触头接触不良是导致变压器有载调压开关的紧固螺栓螺母紧固不牢的原因,并提出了相应的防范措施及建议。

In this paper,for a 110 kV transformer load tap-tap linear resistance exceedances caused by defects in a detailed analysis to diagnose correctly judged the cause of the defect and the defect site,through on-site inspection confirmed the correctness of the analysis,and the defects are processed to eliminate hidden dangers,thus ensuring the safe operation of the transformer,and proposed a corresponding preventive improvement measures.