Dual-PI Rotor Current Control of Doubly-Fed Induction Wind Generators under Unbalanced Grid Voltage

Author

Ya, Deng ; Hui, Liang

Author_Institution

Sch. of Electr. Eng., Beijing Jiaotong Univ., Beijing, China

fYear

2011

fDate

25-28 March 2011

Firstpage

1

Lastpage

5

Abstract

This paper studied mathematical model of doubly-fed induction generator (DFIG) based wind turbine generation system under unbalanced voltage. A dual-PI current control strategy was proposed to improve the performance of DFIG´s rotor side convert (RSC) under asymmetrical voltage condition. The symmetrical component theory is employed to decompose asymmetrical three-phase variable such as voltage and current. Simulation results based on Matlab/Simulink of a 1.5 MW DFIG prototype are provided to compare the performance of RSC using traditional control method and proposed control scheme under unbalanced voltage condition. The proposed control strategy shows a promising result for eliminating negative sequence components of stator current and rotor current as well as attenuating torque and reactive power oscillation.

Keywords

PI control; asynchronous generators; electric current control; machine control; power grids; reactive power; rotors; stators; turbogenerators; wind turbines; DFIG; asymmetrical three-phase variable decomposition; asymmetrical voltage condition; doubly-fed induction wind generator; dual-PI rotor current control; negative sequence component elimination; power 1 MW; reactive power oscillation; rotor current; rotor side convertor; stator current; symmetrical component theory; unbalanced grid voltage; wind turbine generation system; Current control; Induction generators; Rotors; Stators; Torque; Voltage control; Wind turbines;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific

Conference_Location

Wuhan

ISSN

2157-4839

Print_ISBN

978-1-4244-6253-7

Type

conf

DOI

10.1109/APPEEC.2011.5748806

Filename

5748806