Optimal smoothing control strategy of virtual energy storage system in microgrid based on continuous state constraints

被引：0
|
作者：
Chen Z. [1 ]
Wang D. [1 ]
Jia H. [1 ]
Wang W. [1 ]
Guo B. [2 ]
Qu B. [2 ]
Deng S. [3 ]
机构：
[1] Key Laboratory of Smart Grid, Tianjin University, Ministry of Education, Nankai District, Tianjin
[2] China Electric Power Research Institute, Haidian District, Beijing
[3] Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Tianjin University, Ministry of Education, Nankai District, Tianjin
来源：
| 2017年 / Power System Technology Press卷 / 41期
基金：
中国国家自然科学基金;
关键词：
Demand response; Energy storage battery; Optimal control; Virtual energy storage;
D O I：
10.13335/j.1000-3673.pst.2016.0210
中图分类号：
学科分类号：
摘要：
Considering the interactive characteristics of "source-load" in city park microgrid, through centralized control of large scale air conditioners in microgrid, load curve can be adjusted to establish a "virtual storage" effect based on interactive features of "storage-load" in city park microgrid. Considering coordinated operation of "virtual storage" and storage battery, a strategyis built to suppress power fluctuation in tie-lines in microgrid based on continuous state constraint-based optimal control. There are three parts in optimal control model: 1) state space equation describing the system; 2) VSOC (virtual state of charge) based on power and equality/inequality constraints of "virtual storage" and storage battery; 3) objective function expressing optimal control performance. Using optimal control algorithm makes tie-line power of microgrid match reference value. At last, this paper discusses influence of renewable energy penetration and battery capacity on optimal controlresults with sensitivity analysis. Results show that optimal control of the battery and "virtual energy storage" solution can realize trace reference target accurately with optimal allocation of storage response amount, guarantee reasonable state of charge of battery, guarantee comfortability of air conditioner and maintain positivity of attending response of users. © 2017, Power System Technology Press. All right reserved.
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页码：55 / 63
页数：8
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