Transient Characteristics and Quantitative Analysis of Electromotive Force for DFIG-based Wind Turbines during Grid Faults  

作　　者：Yumei Ma Donghai Zhu Xudong Zou Yong Kang Josep M.Guerrero 

机构地区：[1]Key Laboratory of Power Electronics and Energy Management for Ministry of Education of China,Huazhong University of Science and Technology,Wuhan 430074,China [2]Department of Energy Technology,Aalborg University,Aalborg 9220,Denmark

出　　处：《Chinese Journal of Electrical Engineering》2022年第2期3-12,共10页中国电气工程学报（英文）

基　　金：Supported in part by the National Natural Science Foundation of China under Grant 51907072;in part by the Fundamental Research Funds for the Central Universities under Grant 2021XXJS004。

摘　　要：For doubly-fed induction generator(DFIG)-based wind turbines(WTs),various advanced control schemes have been proposed to achieve the low voltage ride through(LVRT)capability,whose parameters design is significantly reliant on the rotor electromotive force(EMF)of DFIG-based WTs.However,the influence of the rotor current on EMF is usually ignored in existing studies,which cannot fully reflect the transient characteristics of EMF.To tackle with this issue,this study presents a comprehensive and quantitative analysis of EMF during grid faults considering various control modes.First,the DFIG model under grid faults is established.Subsequently,the transient characteristics of EMF are analyzed under different control modes(that is,rotor open-circuit and connected to converter).Furthermore,the EMF transient eigenvolumes(that is,accessorial resistance item,transient decay time constant,and frequency offset)are quantitatively analyzed with the typical parameters of MW-level DFIG-based WT.The analysis results contribute to the design of the LVRT control scheme.Finally,the analysis is validated by the hardware-in-the-loop experiments.

关 键 词：Doubly-fed induction generator(DFIG) electromotive force(EMF) quantitative analysis transient characteristics wind turbines(WTs) grid faults 

分 类 号：TM62[电气工程—电力系统及自动化]