110kV变压器套管击穿故障的诊断与分析

Diagnosis and Analysis of Breakdown of 110 kV Transformer Bushing

针对某110 kV电力变压器高压侧中性点套管均压球处绝缘薄弱,在线路遭受雷击产生雷击过电压时被击穿放电损坏故障,通过故障后的色谱试验对故障性质及严重程度进行了诊断,并结合高压试验结论、设备故障发生时的情况、设备结构开展综合分析,准确判断了设备的故障部位,从而为检修提供准确的检修策略。

Aiming at the weak insulation of the voltage equalizing ball at the neutral pointbushing of the high-voltage side of a 110 kV power transformer,it was damaged by breakdown discharge when the line was subjected to lightning strikes and produced lightning overvoltage.The nature and severity of the fault were diagnosed through the chromatographic test after the fault.Combined with the conclusion of high-voltage test,the situation of equipment failure,and the structure of the equipment,a comprehensive analysis was carried out to accurately determine the location of the equipment failure,thereby providing an accurate maintenance strategy for maintenance.