Sizing and Locating of BESS-PV System Based Load Flow Analysis for the Integration into Al-Bayda City Medium Voltage Network

The integration of renewable energy sources with energy storage systems becomes a necessity to improve the performance of the electric grid and to meet the growing demand for energy. The aim of this research is to find the optimal size and location of the associated battery energy storage-photovoltaic (BESS-PV) system for the medium voltage (MV) network of the city of Al-Bayda in order to improve the voltage and reduce the power losses. Firstly, three preselected sizes of BESS-PV system were tested to determine the best size. Secondly, working with the optimal determined size, the optimal locations among ten locations of MV stations that were selected as a case study, were determined. Through simulation based load flow analysis using a trial version of Power Transient Analyzer software, the two previous steps were performed. The main results of this study are that the optimal size of the battery energy storage system and the photovoltaic system was BESS = 1.5 MW and PV = 2 MW respectively, while the optimal stations evaluated with this optimal size were the AL-Riyadhya, AL-Shuela, AL-Muasalat, and AL-Edhaea, which contributed to improving the voltage and reducing losses more than the rest of the other stations.