Optimal configuration of battery energy storage systems using for rooftop residential photovoltaic to improve voltage profile of distributed network

• Published in: Journal of engineering (Stevenage, England) Vol. 2019; no. 16; pp. 728 - 732
• Main Authors: Tang, Jinrui, Cai, Defu, Yuan, Chengqing, Qiu, Yuanchao, Deng, Xiangtian, Huang, Yunhui
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 01.03.2019; Wiley
• Subjects: battery energy storage systems; battery storage plants; BES systems; building integrated photovoltaics; distributed network; distributed power generation; integrated voltage regulation method; invertors; low-voltage distribution system; LVDN; optimal configuration model; power distribution control; power generation control; PV inverter; reactive power; reactive power capability; residential electric load; rooftop residential photovoltaic generation; rooftop residential PV generation; The 14th IET International Conference on AC and DC Power Transmission (ACDC 2018); two-stage voltage control method; two-stage voltage regulation strategy; voltage control; power distribution control; rooftop residential photovoltaic generation; low-voltage distribution system; optimal configuration model; reactive power capability; PV inverter; power generation control; distributed power generation; two-stage voltage regulation strategy; residential electric load; building integrated photovoltaics; battery energy storage systems; invertors; rooftop residential PV generation; reactive power; LVDN; battery storage plants; BES systems; two-stage voltage control method; voltage control; integrated voltage regulation method; distributed network
• ISSN: 2051-3305; 2051-3305
• DOI: 10.1049/joe.2018.8386

Due to the power mismatches between residential load and rooftop residential photovoltaic (PV) generation, voltage profile of low-voltage distribution system (LVDN) may exceed the allowable limit during the daytime and is well below the lower limit at night. To solve this problem, an optimal configuration of battery energy storage (BES) systems is used for rooftop residential PV to improve the voltage profile of LVDN. Firstly, typical curves of residential electric load and PV generation are analysed to demonstrate the principle of integrated voltage regulation method. Secondly, two-stage voltage regulation strategy is proposed to minimise the installed capacity of BES. More specifically, to limit the voltage with reasonable level, the reactive power capability of PV inverter can be utilised in inner stage, and BES is used in outer stage in term of storage charging at off-peak time and discharging at the peak time. Finally, optimal configuration model is achieved by combining the two-stage voltage control method and the constraint condition of total reduced PV generation. Simulation results indicate that the voltage level in LVDN could be controlled in a proper range by the proposed optimal configuration scheme and the total installed capacity of BES is the minimum.