一起智能站所用变故障原因分析及反措

Analysis and Countermeasures of a Transformer Failure in Intelligent Station

针对某智能站一起所用变故障后的保护异常动作,经分析是智能站所用变保护SV采样异常导致闭锁保护,所用变高低压侧短路电流故障的差异产生了所用变高压侧TA变比选择问题,并提出了针对性建议。

Abnormal protection action occurred after a transformer fault in an intelligent station.The analysis shows that the blocking protection is caused by the abnormal sampling of the variable protection SV used by the intelligent substation.The difference between the short circuit current fault of the variable high voltage side and the high voltage side is generated,and the TA variable ratio selection problem of the variable high voltage side is generated.Finally,some pertinent suggestions are put forward.