Comparison of Dynamic Response Characteristics of Typical Energy Storage Technologies for Suppressing Wind Power Fluctuation

Abstract

The intermittence and randomness of wind speed leads to the fluctuation of wind turbine output power. In order to study the applicability of battery, super capacitor and flywheel energy storage technology in suppressing wind power fluctuation, this paper takes a 3 MW direct drive wind turbine as an example, and, through the establishment of a wind storage system model, the dynamic response characteristics and application effects of the three typical energy storage technologies to suppress the power fluctuation of the wind turbine under two wind speed fluctuation scenarios are simulated and studied, and the stability of output power is quantitatively analyzed. Results show that all the three energy storage systems respond well to power command curves, but when the wind power fluctuation is large, the flywheel energy storage has a better effect on suppressing the wind power fluctuation, which can suppress about 70% of the power fluctuation.

Simulation of Secondary Frequency Modulation Process of Wind Power with Auxiliary of Flywheel Energy Storage

“…In 2008, a 0.5 MW FESS-independent frequency modulation power station was built in Massachusetts, the United States, to maintain the fluctuating balance between power supply and demand throughout the state [12,13]. In 2014, Beacon Power Company of the United States successively built a 20 MW flywheel frequency modulation power station in Pennsylvania and New York [14,15]. The frequency modulation capacity of the flywheel frequency modulation power station accounted for 3.3% of the total frequency modulation capacity in New York and completed 23.8% of the total frequency modulation tasks of the whole network [16][17][18].…”