NDLI: Stability of DC-link voltage affected by phase-locked loop for DFIG-based wind turbine connected to a weak AC system

Content Provider	IEEE Xplore Digital Library
Author	Wang, Dong Hu, Jiabing Huang, Yunhui Wang, Ningbo Zhou, Qiang
Copyright Year	2014
Description	Author affiliation: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China (Wang, Dong; Hu, Jiabing; Huang, Yunhui) \|\| Wind Power Technology Center of Gansu Electric Power Corporation, Lanzhou 730050, China (Wang, Ningbo; Zhou, Qiang)
Abstract	The paper investigates the stability of DC-link voltage, in electromagnetic time scale, of doubly fed induction generator (DFIG) based wind turbine attached to a weak AC system. In weak AC system, the dynamic of phase-locked loop (PLL) is coupled with DFIG converters' control. A reduced order model is proposed for stability analysis of DFIG DC-link voltage. Eigenvalue analysis shows that PLL, active power control (APC) and reactive power control (RPC) of rotor side converter (RSC) mainly participate in dominant oscillation mode of control system. The interactions between PLL and RSC control damage the stability of DC-link voltage in weak grid. Synchronizing and damping components defined by PLL are presented for stability analysis physically. Each control's contribution to synchronizing and damping components is analyzed for different grid strengths and PLL gains. It clearly illustrates how PLL and RSC control interact leading to system instability. Time domain simulation of a detailed model was carried out to verify the validity of the analysis above.
Starting Page	2600
Ending Page	2606
File Size	404121
Page Count	7
File Format	PDF
ISBN	9781479951628
DOI	10.1109/ICEMS.2014.7013940
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase locked loops Voltage control Stability analysis Power system stability Damping Oscillators Mathematical model wind turbines DC-link voltage stability DFIG phase-locked loop (PLL) weak AC grid
Content Type	Text
Resource Type	Article

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