Optimal configuration of battery energy storage system considering comprehensive benefits in power systems

At present, many researches on determining the battery energy storage system (BESS) capacity focus on stabilization of power or voltage and peak load shifting, whose optimal objectives are usually minimizing the capitalized cost. Taking the benefits of declining the amount of renewable energy curtailment and peak regulation capacity and capitalized cost into account, the maximum comprehensive economic benefits in power system after the integration of BESS in wind farms are considered as the objective to establish a configuration optimal model. Then, the relationship curve of BESS capacity and the economic benefits is derived to seek the best solution of BESS capacity and power allocation with the maximum economic benefits. Finally, the real data of wind power and load power in a certain area in China are employed as examples to calculate the total configuration capacity of BESS in this area. In the condition of the present high capitalized cost of energy storage devices, it is analyzed whether ESS technology can achieve large-scale application in power systems.