Coordinated Frequency Control of an Energy Storage System with a Generator for Frequency Regulation in a Power Plant

Abstract

Considering the controllability and high responsiveness of an energy storage system (ESS) to changes in frequency, the inertial response (IR) and primary frequency response (PFR) enable its application in frequency regulation (FR) when system contingency occurs. This paper presents a coordinated control of an ESS with a generator for analyzing and stabilizing a power plant by controlling the grid frequency deviation, ESS output power response, equipment active power, and state of charge (SoC) limitation of the ESS in a power plant. The conventional generator and FR-ESS controllers were investigated and compared. To obtain the optimal frequency and power response, an ESS-based adaptive droop control method was proposed. The proposed control strategy was developed and implemented considering the changes and limitations of the dynamic characteristics of the system, FR requirements, and an ESS using the PSCAD/EMTDC software. The simulation results showed that the proposed method was more effective than the conventional droop-control-based FR-ESS, and the effectiveness of this method was validated.

Optimized scheduling study of user side energy storage in cloud energy storage model

“…Wu Shengjun et al analyzed the operation mode of existing energy storage systems, establishing a two-level planning model considering the time scale 15 . Lateef Onaadepo Ibrahim et al conducted research on methods for achieving optimal frequency and power responses 16 . They proposed an adaptive droop control method based on energy storage systems and implemented the proposed control strategy.…”