LVRT Research of PMSG Wind Turbine Using Feedback Linearization

Jie Wei, Zhenyu Lin, Nian Liu

College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, China.
Smart Grid Key Laboratory of Sichuan Province, School of Electrical Engineering and Information, Sichuan University, Chengdu, China.

DOI: 10.4236/epe.2013.54B073                

Abstract

Analyzing the wind turbine with a direct-driven PMSG, this paper proposes a low voltage ride through scheme of PMSG wind power systems based on feedback linearization. The DC-Link voltage is controlled by the generator-side converter rather than the grid-side converter. Considering the nonlinear relationship between the DC-Link voltage and the generator rotor speed, the controller of DC-Link voltage uses a feedback linearization technology. The grid-side converter which controls the grid active power according to the maximum power point tracking adds a judgment link for the generator speed reference. The model of 2 MW PMSG wind power system was simulated by using PSCAD. The simulation result has verified the validity of the proposed control scheme.

Keywords

PMSG; DC-Link Voltage; Converter; PSCAD

Conflicts of Interest

The authors declare no conflicts of interest.

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