Energy storage principle of new energy stations

Why is energy storage configuration important?

In the context of increasing renewable energy penetration, energy storage configuration plays a critical role in mitigating output volatility, enhancing absorption rates, and ensuring the stable operation of power systems.

Why are energy storage stations important?

As the proportion of renewable energy infiltrating the power grid increases, suppressing its randomness and volatility, reducing its impact on the safe operation of the power grid, and improving the level of new energy consumption are increasingly important. For these purposes, energy storage stations (ESS) are receiving increasing attention.

What is the connection between power stations and energy storage?

Literature explores the connection strategies between power stations and energy storage, constructing a decision-making model for energy storage planning aimed at maximizing economic and environmental benefits, thereby improving the accommodation of new energy generation.

What constraints must the energy storage station satisfy?

The constraints that the energy storage station must satisfy include the capacity and power constraints of the energy storage configuration, as well as the constraint on the unit cost of the energy storage service. The capacity and power constraints are shown in Eqs. (10 – 11). The unit cost constraint of the energy storage service is as follows:

How many electrochemical storage stations are there in 2022?

In 2022, 194 electrochemical storage stations were put into operation, with a total stored energy of 7.9GWh. These accounted for 60.2% of the total energy stored by stations in operation, a year-on-year increase of 176% (Figure 4).

Why do new energy power plants need energy storage?

Due to the uncertainty in the output of new energy power plants, there is a phenomenon of power curtailment during actual output. By configuring energy storage, new energy power plants can store the excess energy and discharge it when the output is insufficient, thus compensating for the power deficit.