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The quantity of electrical energy stored in an energy storage facility plays a critical role in sustaining the operation and functionality of energy storage systems. The power capacity of a facility can be determined by considering its output/input power, conversion efficiency, and self-discharge rate.
However, due to constraints such as power limits, capacity limits, and self-discharge rates, the energy storage power station cannot operate continuously but rather engages in charging and discharging activities at optimal times.
The optimal capacity configuration and maximum continuous energy storage duration are determined through computational analysis, yielding values of 30.8 MW and 4.521 h, respectively. At this configuration, the daily average revenue is 2.362 × 10 5 yuan, the initial investment cost is 1.45 × 10 9 yuan, and the payback period is 4.562 years. 1.
All the data used were collected on-site at the power plant. The BESS has a rated power of 20 MW and a rated capacity of 40 MWh. It is assumed that the initial state of charge (SOC) of the storage power plant is 0.4, with upper and lower operating SOC limits of 0.95 and 0.05, respectively.
