The proportion of energy storage power stations in the power grid

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 energy scale of energy storage power stations?

The energy scale of energy storage power station is expanding. By the end of 2022, it has reached 18.27 GWh, with an average charging and discharging time of 2.1 hours. Influenced by local policies that “new energy power stations must be equipped with energy storage”, storage in power supply-side is the largest, more than 50%.

How do pumped storage power stations recover operating costs?

Pumped storage power stations recover the operating costs of pump and generation through the electricity energy tariff. The capacity tariff reflects the value of the auxiliary services provided by the pumped storage power station, such as frequency regulation, voltage regulation, system standby and black start, etc.

How does a hybrid energy storage system work?

It adjusts the frequency based on changes in the output active power, eliminating the need for mutual coordination among units, Tianyu Zhang et al. Simulation and application analysis of a hybrid energy storage station in a new power system 557 resulting in simple and reliable control with a fast response.