Damping Control for Grid Connected DFIG System Based on Dissipated Energy Coefficient

被引：0
|
作者：
Zhang Y. [1 ]
Zhang M. [1 ]
Gao H. [2 ]
机构：
[1] School of Electrical Engineering, Dalian University of Technology, Dalian
[2] State Grid Henan Electric Power Company Jiaozuo Power Supply Company, Jiaozuo
来源：
Dianwang Jishu/Power System Technology | 2021年 / 45卷 / 07期
关键词：
Dissipated energy coefficient (DEC); Doubly-fed induction generator (DFIG); Energy function method; Fuzzy-logic control; Low frequency oscillation;
D O I：
10.13335/j.1000-3673.pst.2020.1394
中图分类号：
学科分类号：
摘要：
In view of the low frequency oscillation caused by wind power grid integration, a damping analysis method for doubly-fed induction generator (DFIG) system by dissipated energy coefficient (DEC) is proposed. Based on the energy method, DEC shows the relationship between the dissipation of oscillating energy and the damping of system. Comparing the root locus analysis, the effectiveness of DEC is verified in grid connected DFIG system. In a typical two areas & four machines system, damping among generators under different oscillating modes are studied by DEC. From the perspective of damping compensation, a fuzzy control strategy is proposed based on DEC. The optimal fuzzy control parameters are determined by DEC, which can maximize the system damping under inter-area oscillation. Finally, time-domain dynamic simulations verify that the additional damping control has a good effect on suppressing inter-area oscillation on a grid connected DFIG four-machine system under constant and random wind speed. © 2021, Power System Technology Press. All right reserved.
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页码：2781 / 2790
页数：9
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