Distributed Photovoltaic Energy Storage Configuration Method for Distribution Network Considering Voltage Constraint

With the rapid development of distributed photovoltaics, the randomness, intermittency, and fluctuation of its output power result in the aggravated active power imbalance of the distribution network system. In this paper, the constraints of the power supply radius of 10kV and the allowable range of voltage deviation of the distribution network are considered based on the limit transmission capacity under the temperature correction coefficient of the 10kV transmission line. Then, the voltage constraints of the bus at both ends of the 10kV load line and the 10kV distributed photovoltaic power uplink line are analyzed. According to the consumption requirements of distributed photovoltaic power, the control strategy of the energy storage system is proposed. Finally, the effectiveness and adaptability of the proposed method are verified by an actual regional power grid. The proposed method is shown to satisfy the requirements of supplying excess distributed photovoltaic power to the superior power grid and balancing the power consumption in situ.