Research on Control Strategy of Energy Storage Participating in Primary Frequency Regulation ofPower Grid

Abstract

The output of new energy generation has volatility and uncertainty, and does not have the inertial response characteristics of traditional power sources. Large scale connection will aggravate the pressure of power grid frequency regulation, and the rapid response characteristics of energy storage battery make it have significant advantages in participating in power grid frequency regulation. In this paper, a droop control strategy based on droop control for primary frequency regulation of power grid is proposed. The strategy takes into account the state of charge (SOC) of energy storage battery through real-time acquisition of grid frequency, and reasonably controls the charge and discharge of energy storage battery according to different frequency intervals, so as to respond to the frequency change of power grid quickly and play a role in supporting the frequency recovery of the system. Finally, the effectiveness of the control strategy is verified by the actual case simulation.