Research on optimal capacity ratio and power flow analysis of the microgrid system
LI Qing1, WANG Wanjun2, ZHOU Zhenping3
1. Shaanxi University of Technology, Hanzhong, Shaanxi 723001; 2. Long Yuan (Beijing) Solar Energy Technology Co., Ltd, Beijing 100083; 3. Long Yuan (Beijing) Wind Power Engineering Technology Co., Ltd, Beijing 100083
Abstract：How to optimize the allocation of wind, photovoltaic and energy storage capacity in the microgrid system is a major problem faced by microgrid industry at present. This paper establishes the photovoltaic power generation system model using PVsyst software, considering the influence of temperature, dust and other factors, to accurately predict the power generation of photovoltaic system. The load data is tracked for a long time. The load growth in the next five years is considered by using the load density prediction method, and the existing load is analyzed in detail to establish a load model. Combined with the simulation analysis of Homer software, the research and analysis are carried out from the aspects of absorbing the residual power of photovoltaic power generation system and the difference between peak and valley electricity prices. With the lowest electricity cost as the goal, the optimal ratio of photovoltaic system and energy storage capacity in the microgrid system is given. Finally, the power flow analysis of the microgrid system is carried out through PSD-BPA software, and the voltage fluctuation range of the access node of photovoltaic system is verified to meet the specification requirements.
黎青, 王万军, 周振平. 微电网系统最优容量配比及潮流分析研究[J]. 电气技术, 2022, 23(12): 17-23.
LI Qing, WANG Wanjun, ZHOU Zhenping. Research on optimal capacity ratio and power flow analysis of the microgrid system. Electrical Engineering, 2022, 23(12): 17-23.
2022, Vol. 23 
