线路覆冰绝缘子串防冰闪措施及分析

Measures of Preventing Ice Flashover for Transmission Line Insulator String and Analysis of Mechanism

线路绝缘子发生覆冰闪络故障 ,对线路安全运行造成威胁。绝缘子发生冰闪的主要原因是冰凌桥接绝缘子串裙边 ,而融冰水电导率高造成冰闪电压大为降低。阻隔导电率高的融冰水形成闪络通道的水帘 。

The ice flashover accident of transmission line insulator is harmful for transmission line safe operation. The cause of insulator ice flashover is the ice bridge. But the melting ice water of high electric conductivity will decrease the ice flashover voltage. Separating the water curtain of the melting ice water is the measure to rise ice insulator flashover voltage.