一起10kV站用变故障分析及防范措施

Fault Analysis and Preventive Measures for a 10kV Substation Transformer

结合故障录波分析了一起10kV站用变故障,主要原因为站用变10kV进线电缆与其高压侧绕组外连接线安全距离不足导致绝缘老化放电,并造成短路故障。针对该案例,分别就在运站用变及新建站用变提出了相应的防范措施,为站用变安全运行积累经验。

Combined with the fault recording,the faults of a transformer for the 10kV substation is analyzed.The main reason is that the safe distance between the 10kV incoming cable of the substation transformer and external connection wire of high voltage side winding is insufficient,which leads to insulation aging and discharging,and also causes short circuit trouble.In view of this case,the corresponding preventive measures are put forward to the old and new substation transformer respectively,which accumulating experience for the safe operation of the substation transformer.