Dynamic Zoning and Collaborative Control of Autonomous Region of an Active Distribution Network Based on Synchronous Measurement Information

Abstract

With the continuous access of distributed power to the active distribution network, the voltage overrun at key load nodes is easy to occur, which will affect the safe operation of the active distribution network. Therefore, the dynamic partition and collaborative control method of autonomous region of active distribution network based on synchronous measurement information are studied, so as to rationally dynamically partition the active distribution network, effectively coordinate the voltage control of each partition, and ensure the safe operation of distribution network. Synchronous phasor measuring device is used to collect node voltage related information of distribution network. Based on the collected information and the eigenroots of the electrical distance matrix, the number of larger eigenroots, namely the optimal dynamic partition number, is determined. Ward distance clustering algorithm is used to complete the dynamic partition of distribution network. After the completion of dynamic partition, for the nodes with the most serious voltage overlimit in each partition, the collaborative control of the voltage in each partition is completed according to the eventdriven mode. The experimental results show that the proposed method can be used to dynamically partition the autonomous regions of active distribution network and ensure that the reactive power reserve margin of each region is higher than the minimum standard. This method can effectively control the voltage of each node, and the control time is short and the active power loss is less.