Prefabricated substation monitoring and control system based on wireless sensor networks

SHEN Chu-yan， YANG Peng， SHI Wang-wang
（College of Energy and Power Engineering， Yangzhou University， Yangzhou 225127， China）

Abstract： In order to solve the problems of prefabricated substation，such as small space，strong electromagnetic interference and more monitoring signals，wireless sensor network（WSN） technology was used in prefabricated substation monitoring system. High performance and low-powered JN5139 was adopted as the main processor chip. The sensor nodes of high-voltage room，transformer room，low-voltage room，high-voltage cabinet contact temperature sensor and router were built. The coordinator node was constructed by microcontroller LPC2210 and ethernet controller RTL8019AS. Prefabricated substation monitoring system was composed by ZigBee wireless sensors. The non-blocking design was used in sensor node software to reduce CPU latency time and improve CPU utilization. In order to increase efficiency，the UDP method to receive data was used in coordinator node software. The experimental results of sensor nodes were given，which show that low cost continuous online monitoring is achieved and the sensor nodes are low powered and stable，thus safe operation of substation equipment is guaranteed.
Key words： prefabricated substation； JN5139； ZigBee technology； sensor node； wireless sensor network（WSN）