Research on distributed power quality monitoring device with 25.6k sampling rate

Aiming at the problem that CVT increases C3 needs on-site sampling and the insufficient sampling rate of digital substations leads to insufficient accuracy of power quality monitoring. A distributed power quality monitoring device with a sampling rate of 25.6k is proposed. The device mainly realizes local sampling through the merging unit, and the merging unit sends the sample data to the power quality monitoring terminal through the multi-ASDU IEC61850-9-2 data frame format to complete the calculation and analysis of various indicators of power quality. The performance indicators of the distributed power quality monitoring device prototype have been verified by a third-party type test. As a stable and reliable power quality monitoring solution for substations, it has pretty promotion prospects.