Coordinated Frequency Regulation Strategy of Wind, Diesel and Load for Microgrid with High-penetration Renewable Energy

被引：0
|
作者：
Bian X. [1 ]
Jiang Y. [2 ]
Zhao Y. [1 ]
Li D. [1 ]
机构：
[1] College of Electric Power Engineering, Shanghai University of Electric Power, Shanghai
[2] Electric Power Research Institute of State Grid Zhejiang Electric Power Corporation, Hangzhou
来源：
Zhao, Yao (nihaozhaoyao@163.com) | 2018年 / Automation of Electric Power Systems Press卷 / 42期
关键词：
Controllable load; Coordinated frequency regulation; Doubly-fed induction generator (DFIG); High-penetration renewable energy; Microgrid;
D O I：
10.7500/AEPS20170803006
中图分类号：
学科分类号：
摘要：
Since a microgrid includes high-penetration wind turbines, photovoltaic generation units, diesel generators, load and other components, its frequency regulation is difficult. In order to make full use of standby resources (wind, diesel and load) on improving the performance of frequency regulation, considering the optimization of overall microgrid frequency, this paper proposes a coordinated frequency regulation strategy of wind, diesel and load for microgrid with high-penetration renewable energy. According to the interaction of frequency characteristics between wind, diesel, load and microgrid, the frequency characteristics of the microgrid with high-penetration wind power are deduced, and a frequency characteristic model of microgrid combined with coordinated frequency regulation of wind, diesel and load is developed. Then the frequency characteristics of the microgrid under different regulation parameters are compared and analyzed. The wind turbines and diesel generators always participate in the frequency regulation, and the controllable load is involved in the frequency regulation only when the sudden change of load is greater than the spare capacity of wind turbines and diesel generators. The frequency regulation coefficient of the controllable load changes according to the frequency fluctuation. Thus, the spare capacity of wind turbines and diesel generators for frequency regulation and the power supply reliability are both considered. The microgrid can not only make full use of the frequency regulation capability of wind turbines and diesel generators, but also reduce the frequency regulation pressure of the controlled load, to ensure the power supply reliability on the demand side. The simulation results show that the proposed frequency regulation strategy can effectively improve the frequency stability of microgrid with high-penetration renewable energy, and reduce the frequency regulation pressure of controlled loads. © 2018 Automation of Electric Power Systems Press.
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页码：102 / 109
页数：7
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