Dynamic economic evaluation of hundred megawatt-scale electrochemical energy storage for auxiliary peak shaving  

作　　者：Junhui Li Gang Mu Jiahui Zhang Cuiping Li Gangui Yan Haotian Zhang Guohang Chen 

机构地区：[1]Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin 132012,China [2]State Grid Zhejiang Pinghu City Electric Power Supply Company.LTD.,Pinghu 314200,Zhejiang Province,China.

出　　处：《Protection and Control of Modern Power Systems》2023年第3期252-269,共18页现代电力系统保护与控制（英文）

基　　金：supported by Joint Foundation of Natural Science Foundation of Jilin Province(No.YDZJ202101ZYTS152).

摘　　要：With the rapid development of wind power,the pressure on peak regulation of the power grid is increased.Electro-chemical energy storage is used on a large scale because of its high efficiency and good peak shaving and valley fill-ing ability.The economic benefit evaluation of participating in power system auxiliary services has become the focus of attention since the development of grid-connected hundred megawatt-scale electrochemical energy storage systems(ESS).Based on the relationship between power and capacity in the process of peak shaving and valley filling,a dynamic economic benefit evaluation model of peak shaving assisted by hundred megawatt-scale electrochemi-cal ESS considering the equivalent life of the battery is proposed.The model considers the investment cost of energy storage,power efficiency,and operation and maintenance costs,and analyzes the dynamic economic benefits of dif-ferent energy storage technologies participating in the whole life cycle of the power grid.Then,according to the cur-rent ESS market environment,the auxiliary service compensation price,peak-valley price difference and energy stor-age cost unit price required to make the energy storage technology achieve the balance of payments are calculated,and the economic balance points of different energy storage types are clarified.Finally,based on the measured data of different provincial power grids,the economies of six energy storage types applied to three provincial power grids are compared and analyzed,and the rationality and effectiveness of the relevant models proposed are verified.The work has theoretical guiding significance for the economic benefit evaluation of hundred megawatt-scale electro-chemical energy storage.Highlights 1 A proportional relationship between grid filling power and capacity demand is proposed.It is used to determine the energy storage configuration for auxiliary peak shaving.2 A dynamic economic evaluation model considering energy storage investment and maintenance costs,electric-ity profit,and auxiliary

关 键 词：AUXILIARY VALLEY ELECTROCHEMICAL 

分 类 号：TM73[电气工程—电力系统及自动化]