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

Lateef Onaadepo Ibrahim, In-Young Chung, Juyoung Youn, Jae Woong Shim, Youl-Moon Sung, Minhan Yoon () and Jaewan Suh ()
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Lateef Onaadepo Ibrahim: Department of Electrical Engineering, Kyungsung University, Busan 48434, Republic of Korea
In-Young Chung: Western Power Research Institute, Korea Western Power Corporation, Daejeon 34056, Republic of Korea
Juyoung Youn: Doosan Heavy Industries & Construction, Yongin 16858, Republic of Korea
Jae Woong Shim: Department of Electrical Engineering, Sangmyung University, Seoul 03016, Republic of Korea
Youl-Moon Sung: Department of Electrical Engineering, Kyungsung University, Busan 48434, Republic of Korea
Minhan Yoon: Department of Electrical Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
Jaewan Suh: Department of Electrical Engineering, Dongyang Mirae University, Seoul 08221, Republic of Korea

Sustainability, 2022, vol. 14, issue 24, 1-17

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.

Keywords: energy storage system; droop control; frequency regulation; inertia constant; state of charge; PSCAD/EMTDC (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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