DocumentCode :
3765509
Title :
DFIG WT electromechanical transient behaviour influenced by PLL: Modelling and analysis
Author :
Yajing Wang;Jiabing Hu;Dongliang Zhang;Chao Ye;Qing Li
Author_Institution :
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Eelectronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
fYear :
2015
Firstpage :
1
Lastpage :
5
Abstract :
With increasing wind power penetrations, WTGs shoulder a higher responsibility. Traditional WTG control and modelling is generally designed assuming that the external grid is strong enough. However, in the case of weak grid in which power variations between synchronous generators (SG) and DFIG are more intense, more appropriate DFIG model needs to be built for electromechanical transient stability analysis of power system. Phase-locked loop (PLL) is typically employed in modern megawatt WTGs and tracks the WT´s terminal voltage phase change, so as to provide reference frame for active/reactive power control. Thus power output of DFIG as well as other power source in the system subjects to PLL´s dynamic responses. This work establishes a DFIG-based WT´s electromechanical transient model considering the dynamic influence of PLL, and analyses its dynamic response which influences WTG electromechanical transient behaviour and system stability.
Publisher :
iet
Conference_Titel :
Renewable Power Generation (RPG 2015), International Conference on
Print_ISBN :
978-1-78561-040-0
Type :
conf
DOI :
10.1049/cp.2015.0331
Filename :
7446488
Link To Document :
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