Distributed power quality monitoring system based on EtherCAT

To resolve multi-point power quality monitor of smart grid and voltage fluctuation of industrial and mining enterprises,the distributed power quality monitoring system is developed. The system includes three parts:monitoring terminal, communication network and monitoring center. Monitoring terminal can be installed on any node for Monitoring, collect the high speed data of grid, and show the power quality message real-timely. Communication network can exchange mass data between monitoring terminal and monitoring center by using EtherCAT. EtherCAT is very excellent at transmission speed and reliability. Monitoring center collects and stores the power quality data of all monitoring terminals. Through analyzing the data, monitoring center can recognize power quality disturbance, find the disturbance source, evaluate power quality and publish information.