Research on Voltage Sag Source-Locating System Design of Distribution Network Based on Synchronous Phasor Measurement

Abstract

[Introduction] Voltage sag is one of the most serious power quality problems in distribution network. At present, due to the lack of a system to locate the source of voltage sag, the problem of responsibility division and attribution has always been the difficulty in dealing with voltage sag accidents. It is an effective way to solve the problem of voltage sag traceability by monitoring and analyzing the synchronous power quality measurement data of distribution network. [Method] Firstly, the architecture and fusion scheme of the integration of synchronous phasor and power quality measurement were analyzed, and a method of voltage sag source tracing and location based on real-time synchronous measurement data was proposed. Then, the case design scheme of distribution network demonstration project was proposed. Finally, the application of synchronous phasor and power quality measurement integration in intelligent distribution network was summarized in this paper. [Results] The results of demonstration construction verify the feasibility of the proposed design scheme. [Conclusion] The demonstration project has accumulated engineering experience for subsequent large-scale promotion and replication.

Keywords

• distribution network
• synchronous phasor measurement
• power quality measurement
• voltage sag source-locating
• design scheme