Energy storage power station operation costs

Energy storage cost is an important parameter that determines the application of energy storage technologies and the scale of industrial development. The full life cycle cost of an energy storage power station can be divided into installation cost and operating cost.

This allocation method, although straightforward for the overall system to distribute the costs associated with the shared energy storage power station to each renewable energy power station involved, does not take into account the practical use rates of the shared energy storage services and may appear unjust to stakeholders.

Generally speaking, the cost of the gas storage tank is the most expensive part of the entire system. Operation and maintenance costs include energy consumption and equipment maintenance. The current cost of compressed air energy storage systems is between US$500-1,000/kWh.

3. Combined operational and cost allocation models for shared energy storage-assisted power generation systems Here, the power generation system comprises a collection of renewable energy power stations (n = 1, 2, …, n, …, N), specifically wind power plants and photovoltaic power plants, which are connected to a shared energy storage power station.

To enhance the use of the shared energy storage services across multiple renewable energy power stations and allocate the associated costs effectively, three different allocation methods are initially formulated, which include the uniform allocation method, the predictive weighted allocation method, and the dynamic weighted allocation method.

Moreover, the shared energy storage power station is generally discharged from 11:00 to 17:00 to meet the electricity demand of the entire power generation system. In Case I, the state-of-charge gradually increases in the morning, fluctuates between 08:00 and 22:00, and returns to its initial level by 24:00.