A Flexible Power Distribution Strategy with Wind Turbine Generator and Energy Storage for Frequency Regulation in Isolated Microgrid

被引：0

作者：

Zhang J. ^{[1
]}

Zhang Z. ^{[1
]}

Hu S. ^{[1
]}

Li Y. ^{[1
,2
]}

Lin J. ^{[1
,2
]}

机构：

[1] College of Electrical and Information Engineering, Hunan University, Changsha

[2] Hunan Engineering Research Center of Large-Scale Battery Energy Storage Application Technology, Changsha

来源：

Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2022年 / 37卷 / 15期

关键词：

efficient utilization of energy; energy storage; flexible power distribution; frequency regulation; Isolated microgrid; wind turbine generator;

D O I：

10.19595/j.cnki.1000-6753.tces.211032

中图分类号：

学科分类号：

摘要：

Aiming at the issue of frequency fluctuations and low utilization of new energy in isolated microgrid operation, a flexible power distribution strategy with wind turbine generator (WTG) and energy storage (ES) equipment for frequency regulation is proposed in this paper. Firstly, the operating characteristics and corresponding control modes of various distributed generations in isolated microgrid are analyzed. Secondly, the state space model of isolated microgrid with WTG and ES participating in frequency regulation is established. Then, the optimized objective function in the rolling time domain is constructed with the goal of minimizing frequency deviation and maximizing energy utilization rate. And according to the frequency variation, the weight coefficients of the WTG and ES output power item in the objective function are adjusted in real time. Furthermore, the proposed strategy can flexibly adjust the boundary of the constraint conditions at each time section according to the time-varying characteristics of the wind speed and the state of charge (SOC) of ES, which can improve their safe operation level. Finally, the isolated microgrid model is built in MATLAB/Simulink platform, and the proposed control strategy is verified under different working cases. Simulation results show that, under the premise of satisfying the safety operation, the proposed strategy can realize isolated microgrid frequency control while optimizing the active power output of WTG and ES, reducing the wind power curtailment ratio, and achieving the goal of efficient utilization of energy. One more feature of the proposed strategy is the low dependence on the model parameter, which is conducive to robustness. © 2022 Chinese Machine Press. All rights reserved.

引用

页码：3767 / 3780

页数：13

共 29 条

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