A Two-Stage Voltage Coordination Control Strategy for Distribution Networks Based on GWO-AP Partitioning Algorithm

In order to deal with the voltage fluctuation caused by the high penetration of photovoltaics (PV) and realize the coordinated control of various voltage regulating devices in the distribution network, a two-stage voltage coordinated control strategy is proposed. In the day-ahead stage, stochastic optimization based scheduling strategy for OLTC and CB is proposed to adapt to the uncertainty of PV generation and load. In the real time stage, voltage is managed by PV inverters and distributed energy storages (DESS). Considering the decentralized location of PV inverters and DESS, a control method based on partition is proposed to reduce the communication and computational cost. And a partitioning strategy based on Gray Wolf Optimization-Affinity Propagation algorithm (GWO-AP) is proposed to search for subareas with the best structural and power margin. Finally, the proposed strategy is verified in the IEEE33 bus system.