Voltage regulation and battery energy storage SoC balancing method for low voltage distribution network with distributed PV and BESS
Article
Figures
Metrics
Preview PDF
Reference
Related
Cited by
Materials
Abstract:
With the increasing penetration of renewable energy sources, the problems of the voltage fluctuation and limitation violation has become very serious. In order to solve this problem, this paper proposes a voltage regulation method for low voltage distribution network with distributed photovoltaic(PV) and battery energy storage system(BESS). First, the impact of distributed PV sources to network voltage is analyzed and the relationship between node voltage magnitude and node injection power is deduced and linearized. Then the power mileage based voltage regulation model is constructed, with which the output of distributed battery energy storage system (DBESS) is calculated by solving the optimization target. Finally, state of charge(SoC) balancing strategy of DBESS is designed to enhance the efficiency of BESS. Furthermore, a simulation model, which is derived from a real 0.4 kV feeder in Wuxi, Chongqing, is built on Matlab/Simulink to test the effectiveness of the proposed method with four different cases. Simulation results shows that the proposed method can keep the system voltage in a normal range and can also guarantee the balance of SoC.
