摘要
为了提高新能源高渗透率下的交直流混联系统的频率稳定性,采用功率型储能和能量型储能组成的混合储能系统参与电网一次调频。提出了含混合储能的电网一次调频仿真模型,针对功率型储能在运行过程中可能出现的功率不足或荷电状态不足导致的无法持续、有效地改善电网的一次频率调整问题,设计了混合储能的充放电响应策略,使得电网在遭受幅度较大或持续性较长的负荷扰动时,能量型储能可以辅助功率型储能进行调频,同时可以避免能量型储能频繁动作,以延长其电池寿命。依托某省实际电网算例,仿真验证了所提出的混合储能充放电策略对改善电网一次调频的有效性,并分析了混合储能容量配置与电网可承受的最大负荷扰动的关系。
In order to improve the frequency stability of the AC/DC interconnected power system with high penetration of renewable energy,the Hybrid Energy Storage System(HESS)consisting of power-type and capacity-type energy storage is used to participate in the primary frequency regulation of power grid.The primary frequency modulation simulation model of the HESS was proposed.Focusing on the problem that the power type storage system cannot continuously and effectively improve the primary frequency,due to the power shortage or insufficient state of chargethat may occur during the operation of power storage,a charging and discharging strategy of the HESS was designed in this paper.The strategy enables the energy type storage to assist the power storage for the frequency modulation when power grid is subjected to large or long-lasting load disturbances,while avoiding the frequent action of energy storage to extend its battery life.Finally,taking a real power grid of a province as an example,the validity of the proposed charging and discharging strategy of HESS toimprove primary frequency regulation was verified by simulation,and the relationship between the HESS capacity configuration and the maximum load disturbance that the power grid can withstand was analyzed.
作者
高松
王嘉琛
李德鑫
田春光
GAO Song;WANG Jiachen;LI Dexin;TIAN Chunguang(State Grid Jilin Province Electric Power Research Institute,Changchun 130021,China;Qingdao University of Techology,Qingdao 273400,China)
出处
《供用电》
2020年第2期14-20,40,共8页
Distribution & Utilization
关键词
一次调频
混合储能
充放电策略
负荷扰动
容量配置
primary frequency modulation
hybrid energy storage system
charging and discharging strategy
load disturbance
capacity configuration
