A priority-based electric vehicle-assisted grid frequency regulation system

• Published in: 高技术通讯（英文版） Vol. 30; no. 4; pp. 397 - 404
• Main Authors: LI Xuancheng, QIN Jin, QIN Huibin, HUA Yongzhu
• Format: Journal Article
• Language: English
• Published: Institute of New Electron Device and Application,Hangzhou Dianzi University,Hangzhou 310018,P.R.China 01.12.2024
• Subjects: grid frequency regulation; electric vehicle(EV); priority; distributed energy storage system; state of charge(SOC)consisten-cy
• ISSN: 1006-6748
• DOI: 10.3772/j.issn.1006-6748.2024.04.007

During electric vehicle(EV)-assisted grid frequency modulation,inconsistent state of charge(SOC)among EVs can result in overcharging and discharging of the batteries,affecting the stability of the electrical system.As a solution,this paper proposes a priority-based frequency regulation strategy for EVs.Firstly,models for the primary and secondary frequency regulation of EV-assisted power grids are established.Secondly,a consensus algorithm is used to construct a distributed com-munication system for EVs.Target SOC values are used to obtain a local frequency regulation priori-ty list.The list is used in an optimal control plan allowing individual EVs to participate in frequency regulation.Finally,a simulation of this strategy under several scenarios is conducted.The results indicate that the strategy ensures uniform SOC among the participating group of EVs,thereby avoi-ding overcharging and discharging of their batteries.It also reduces frequency fluctuations in the electrical system,making the system more robust compared with the frequency regulation strategy that is not priority-based.