A multi-objective active control strategy for distributed generation under asymmetric voltage sag

被引：0
|
作者：
Ji L. [1 ]
Guo J. [1 ]
Li B. [2 ]
Hong Q. [3 ]
Li Z. [1 ]
Mi Y. [1 ]
Yang X. [1 ]
机构：
[1] School of Electrical Engineering, Shanghai University of Electric Power, Shanghai
[2] School of Electrical Automation and Information Engineering, Tianjin University, Tianjin
[3] University of Strathclyde, Glasgow
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2022年 / 50卷 / 20期
基金：
中国国家自然科学基金;
关键词：
active power control; active voltage support; asymmetric voltages sag; current reference; multi-objective control strategy;
D O I：
10.19783/j.cnki.pspc.226418
中图分类号：
学科分类号：
摘要：
Under asymmetric voltage sag, distributed generation faces problems such as lack of coordination of multiple control objectives and high complexity of control strategies. These can lead to disconnection in serious cases and affect the stable operation of the power grid. Thus, a multi-objective active control strategy for DG is proposed considering voltage sags. First, the influence of grid impedance on voltage is fully considered, and the positive and negative sequence voltage supporting equation under asymmetric voltage sag is established to realize flexible control of phase voltage. Second, several control targets under asymmetric voltage sag based on positive and negative sequence active power and reactive current are established. The mutual restraint mechanism of multiple control objectives is analyzed, and the control objectives are optimized according to the voltage sag scenarios, and the objective function and constraint conditions in different scenarios are constructed. Finally, the Fmincon optimization algorithm is used to realize multi-objective optimal control of a grid-connected inverter under asymmetric voltage sag. Matlab/Simulink is used to verify the effectiveness of the proposed method in different voltage sag scenarios. © 2022 Power System Protection and Control Press. All rights reserved.
引用
收藏
页码：41 / 49
页数：8
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