Online insulation monitoring system of high-voltage capacitive substation equipment based on WSN

This paper introduces an online insulation monitoring system of high-voltage capacitive substation equipment based on Zigbee wireless sensor network. According to the voltage level, a number of Zigbee subnets are installed in the substation to measure the leakage current of the capacitive equipment with the improved accuracy and reliability of the measurement. The clocks of different devices are synchronized to realize the synchronized phase measurements and achieve the precise dielectric loss factor. Several Zigbee subnets construct the sensor net of the substation capacitive equipment state monitoring system. The monitoring master of capacitive devices can be included in the intelligent substation automation system as interval level devices, and can also be connected to a distance substation monitoring master through 3G communication network.