利用油中溶解气体分析技术，结合高压试验进行变压器故障诊断，准确地发现了变压器的故障性质和部位，并进行了相应的处理，保障了电网的安全运行。%The nature and position of transformer faults were identified accurately through dissolved gas analysis technique and high voltage test for fault diagnosis,and treatments were done correspondingly,which ensures the safe operation of power grid.
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