Remote Monitoring System of Leakage Current of Power Transmission Line's Insulator

For the problem that dirt on surface of power transmission line's insulator of power system could cause flashover and lead to braking and power-off, the paper introduced a design scheme of remote monitoring system of leakage current of power transmission line's insulator based on dirt-flashover principle and relationship of dirt degree and leakage current of power transmission line's insulator. The system uses GSM wireless communication method and can realize on-line and remote transmission function for monitored data. Long-term running results on 500 kV, 220 kV and 100 kV high-voltage lines showed that the system is stable in performance and reliable in monitoring data.