Configuration optimization of energy storage power station considering failure cost

With the continuous increase of economic growth and load demand, the contradiction between source and load has gradually intensified, and the energy storage application demand has become increasingly prominent. Based on the installed capacity of the energy storage power station, the optimization design of the series-parallel configuration of each energy storage unit in the power station has become a top priority. Currently, the failure cost is rarely considered during planning and analyzing on internal structure of energy storage power stations. This study deals with optimization design of the series and parallel configuration of internal energy storage units in energy storage power stations. Besides equipment cost and operation and maintenance cost, failure cost and commissioning cost is considered in the study. The impact of equipment failure cost on the total cost of different configurations is focused on once the energy storage unit is integrated to the power station. And energy storage unit arrangement of the station configuration is optimized with the minimum total cost as the goal. Finally, case study based on an energy storage station to be built in Kunshan, China is presented to verify the feasibility and effectiveness of proposed configuration optimization.