Optimal control strategy for large-scale VRB energy storage auxiliary power system in peak shaving

被引:21
|
作者
Li, Junhui [1 ]
Hu, Dacheng [1 ]
Mu, Gang [1 ]
Wang, Shuai [2 ]
Zhang, Zheshen [1 ]
Zhang, Xiaochi [1 ]
Lv, Xiangyu [3 ]
Li, Dexin [3 ]
Wang, Jiarui [3 ]
机构
[1] Northeast Elect Power Univ, Minist Educ, Key Lab Modern Power Syst Simulat & Control & Ren, Jilin 132012, Jilin, Peoples R China
[2] State Grid Zhejiang Elect Power Co Jinhua Power S, Jinhua 321017, Zhejiang, Peoples R China
[3] State Grid Jilin Elect Power Co Ltd, Elect Power Res Inst, Changchun, Peoples R China
基金
中国国家自然科学基金;
关键词
Vanadium redox battery; Modeling; State of charge; Peak shift; Coordinate operation;
D O I
10.1016/j.ijepes.2020.106007
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Large-scale battery energy storage is an inevitable trend in energy storage development. The large-scale all-vanadium liquid-flow battery energy storage system contains a large number of battery energy storage units. Current operation methods usually study large-scale energy storage as an equivalent model. There is a lack of optimization for the operation of modular energy storage units. Efficient and stable operation of large-scale energy storage needs to coordinate the operation of various energy storage units. A battery simulation model was built according to the working mechanism and external characteristics of the vanadium redox battery (VRB). Based on the simulation model, the voltage and current loss characteristics of the vanadium redox battery under the rated power charging and discharging mode were studied. Based on the model, the change in charging and discharging efficiency under different powers is measured. The power-efficiency coupling relationship is studied. The power-efficiency coupling relationship provides the basis for power allocation with the aim of optimizing efficiency. Then, combining the structure of the large-scale vanadium redox battery energy storage system and the power-efficiency coupling relationship, a large-scale energy storage system efficiency mathematical model is constructed. In a peak shaving scenario, aiming at optimizing the efficiency of the energy storage system and according to the efficiency mathematical model of the large-scale energy storage system, a coordinated and optimized operation strategy of the energy storage module is proposed. This module improves the efficiency of the energy storage system.
引用
收藏
页数:13
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