Low-Voltage Distribution Network Dispatching Strategy for High Proportion of Distributed Photovoltaic-Energy Storage System

Abstract

With the rapid increasing of resident photovoltaics, the power utility is hard to effectively manage them, and the voltage at the end of the feeder always exceed the voltage limit. This paper takes the National Key Research and Developing Program—Jinzhai Photovoltaic Demonstration Project as an example, and a dispatching device is developed and installed on the low voltage side of 10kV/380V transformer, which is equipped with a telecontrol dispatching strategy with communication and a local adaptive control strategy without communication. The dispatching strategy mainly aims at the master station instructions, improving the generation capacity of distributed photovoltaics. The local adaptive strategy controls the voltage not exceed limits. Through the active power and reactive power coordinated control of the photovoltaic and energy storage system(ESS), the utility can control the power generation of PVs and the local voltage is optimized. Simulation validates feasibility and effectiveness of the proposed method.