A Deployment Method of Micro-Synchronization Monitoring Terminal for Distribution Network Fault Diagnosis with DG Access

With a large number of DG access to the distribution network, power quality problems and challenge of fault line selection are caused. It is important to monitor the node voltage and current of distribution network. In this paper, a deployment method of micro-synchronization monitoring terminal for distribution network fault diagnosis with DG access is proposed. According to whether there is relay protection device, the line is divided into protected line and unprotected line. Then, the rapid isolation deployment method is adopted for the protected lines. Meanwhile, according to the user demands, the unprotected lines are divided into precise decision line and fuzzy decision line. Finally, precise decision algorithm and fuzzy decision algorithm are used respectively for the precise decision lines and fuzzy decision lines. To verify the effectiveness of the method, a DG-containing distribution network was built in matlab, and the result shows that the method is effective.