Independent energy storage capacity compensation

How do energy storage operators make decisions?

Energy storage operators act as followers, making decisions regarding storage capacity and operational strategies based on the tariffs set by the grid. Their decision-making process incorporates historical capacity tariffs, operating costs, expected returns, and market dynamics.

How does a capacity tariff work for grid-side energy storage stations?

However, according to the current policy of regulatory pricing, particularly the "Opinions on Further Improving the Price Formation Mechanism for Pumped Storage Energy", the capacity tariff for grid-side energy storage stations essentially functions as an equal annual payment mechanism for initial investment recovery.

How does the grid-side energy storage choose to charge and discharge power?

Charge and discharge power and state of charge of the grid-side energy storage. According to Fig. 7, it can be seen that the grid-side energy storage chooses to charge at the time of low and flat electricity prices and discharge at the time of peak electricity prices.

How can capacity tariffs improve energy storage systems?

Several studies have shown that a well-designed capacity tariff mechanism can effectively incentivize the development and optimized operation of energy storage stations, thereby enhancing the flexibility and reliability of the power system (Huang et al., 2023; Khalilpour and Lusis, 2020; Varghese and Sioshansi, 2020; Zhang et al., 2023).

Why do energy storage systems use peak and Valley arbitrage?

This result is attributable to the proposed method, which considers peak and valley arbitrage gains when formulating the capacity tariff. By leveraging peak and valley arbitrage, energy storage systems offset some of their costs, reducing the need for full grid subsidies and lowering the capacity charge.

How does energy storage make money?

In mature power markets, energy storage derives its revenue primarily from participating in energy and ancillary service markets, such as those for peak shaving and frequency regulation (John et al., 2022; Wu et al., 2021). Market-based pricing mechanisms dominate energy storage valuation.