Research on Online Detection Method of Power Quality Monitoring Device and System Design

As power quality monitoring equipment is running in harsh electromagnetic environment, the measurement accuracy is difficult to be guaranteed. Because of the lack of on-site test technology, it is difficult to test the accuracy of the power quality monitoring equipment which is already installed in substation. In order to solve the problem, an on-site testing system of power quality monitoring equipment is designed in this paper. By adopting high precision portable power quality monitoring equipment as standard ratio equipment, high precision IEEE1588 time synchronization technology, automatic reading standard ratio equipment and testing equipment monitoring data, and automatically calculating error, automatic on-site test of power quality monitoring equipment can be achieved. The laboratory test shows that the on-site testing system for power quality monitoring equipment is reliable, and it is suitable for testing the measurement accuracy of the power quality monitoring equipment which is operated in the substation.