摘要
随着可再生能源的高渗透与新型电力系统构架的不断完善,电动汽车既可作为可控负荷,也可作为分布式电源,具有优良的调频特性。为此,提出了一种结合车主期望的充换电站辅助调频策略。首先,基于入/离网时间、入网/期望荷电状态量、电动汽车充放电限制等车主期望建立电动汽车充/放电能力评估模型。其次,结合电动汽车充/放电能力与有功-频率特性曲线建立电动汽车双层控制的调频模型。最后,考虑电网侧和车主侧的需求,提出充换电站参与电网调频策略。仿真结果表明,所提控制策略在满足车主期望及电动汽车自身限制的情况下可有效调节电网频率、提高电网安全稳定运行水平及灵活性。
With the high penetration of renewable energy and the continuous improvement of new power system architectures,electric vehicles can serve as both controllable loads and distributed power sources,with excellent frequency regulation characteristics.Therefore,this paper proposes an auxiliary frequency regulation strategy for charging and exchanging power stations that is combined with the expectations of vehicle owners.First,an evaluation model for the charging/discharging capacity of electric vehicles is established based on the expectations of vehicle owners,such as the entry/exit time,expected state of charge,and charging/discharging limitations.Secondly,a frequency modulation model for dual layer control of electric vehicles is established by combining the charging/discharging capacity of electric vehicles with the active power-frequency characteristic curve.Finally,considering the needs of both the power grid and vehicle owner sides,a strategy is proposed that makes charging and swapping power stations participate in the power grid frequency regulation.Simulation results show that the proposed control strategy can effectively adjust the frequency of the power grid,and improve its safe and stable operation and flexibility while meeting the expectations of vehicle owners and the limitations of the electric vehicle itself.
作者
骆钊
聂灵峰
田肖
李家浩
雷元庆
马瑞
LUO Zhao;NIE Lingfeng;TIAN Xiao;LI Jiahao;LEI Yuanqing;MA Rui(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;Measurement Center of Yunnan Power Grid Co.,Ltd.,Kunming 650500,China;Electric Power Research Institute of State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan 750011,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2024年第13期90-101,共12页
Power System Protection and Control
基金
国家自然科学基金项目资助(52277104)
云南省重点研发计划项目资助(202303AC100003)
云南省应用基础研究计划项目资助(202301AT070455)
宁夏回族自治区重点研发计划项目资助(2021BEE03016)。
关键词
电动汽车
用户需求
V2G
辅助调频
充换电站
electric vehicle
user demand
vehicle to grid(V2G)
auxiliary frequency regulation
battery charging and swapping station
