Coordinated Voltage Control Strategy of Wind Farms Based on Hierarchical Model Predictive Control

被引：0
|
作者：
Zhang Z. [1 ]
Wang C. [1 ]
Dong X. [1 ]
Yang M. [1 ]
Liang J. [1 ]
Zhang H. [2 ]
机构：
[1] Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan
[2] Zhumadian Electric Power Company of State Grid Henan Electric Power Company, Zhumadian
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2019年 / 43卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Coordinated control of reactive power and voltage; Hierarchical control; Model predictive control; Reactive power distribution; Wind power integration;
D O I：
10.7500/AEPS20180717014
中图分类号：
学科分类号：
摘要：
The voltage of point of common coupling (PCC) is susceptible to the random fluctuation of wind power when the grid at the connection point is weak. A hierarchical and coordinated control strategy for reactive power and voltage of wind farms is proposed based on the combination of multiple time scale vertical hierarchical thought and model predictive control (MPC) theory. Firstly, in the adaptive adjustment layer, an adaptive voltage regulation strategy is proposed according to the reactive power capability of the wind farm and the voltage prediction track at PCC. Secondly, in the reactive power distribution layer, the reactive power demand capacity is optimized, and an improved proportional allocation strategy that considers the reactive power margin of each generator is proposed. Finally, in the tracking control layer, the control error is corrected in real time according to the state prediction and reference as well as feedback information. Through hierarchical MPC, the prediction information of different time scales in each layer can be fully utilized, and the control between different layers can be coordinated effectively. The simulation results based on PSCAD verify the effectiveness of the proposed method. © 2019 Automation of Electric Power Systems Press.
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页码：34 / 42and94
页数：4260
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