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Energies 2014, 7(7), 4140-4156; doi:10.3390/en7074140

Fast Coordinated Control of DFIG Wind Turbine Generators for Low and High Voltage Ride-Through

1
College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China
2
Centre for Electric Power and Energy, Department of Electrical Engineering, Technical University of Denmark, Elektrovej 325, Kgs. Lyngby 2800, Denmark
3
Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
4
Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
5
State Key Lab of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
6
Shenzhen Key Laboratory of Urban Rail Transit, Shenzhen University, Shenzhen 518060, Guangdong, China
*
Author to whom correspondence should be addressed.
Received: 20 May 2014 / Revised: 21 June 2014 / Accepted: 22 June 2014 / Published: 27 June 2014
(This article belongs to the Special Issue Wind Turbines 2014)
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Abstract

This paper presents a fast coordinated control scheme of the rotor side converter (RSC), the Direct Current (DC) chopper and the grid side converter (GSC) of doubly fed induction generator (DFIG) wind turbine generators (WTGs) to improve the low voltage ride through (LVRT) and high voltage ride through (HVRT) capability of the DFIG WTGs. The characteristics of DFIG WTGs under voltage sags and swells were studied focusing on the DFIG WTG stator flux and rotor voltages during the transient periods of grid voltage changes. The protection schemes of the rotor crowbar circuit and the DC chopper circuit were proposed considering the characteristics of the DFIG WTGs during voltage changes. The fast coordinated control of RSC and GSC were developed based on the characteristic analysis in order to realize efficient LVRT and HVRT of the DFIG WTGs. The proposed fast coordinated control schemes were verified by time domain simulations using Matlab-Simulink. View Full-Text
Keywords: coordinated control; doubly-fed induction generator (DFIG); grid side converter (GSC); high voltage ride through (HVRT); low voltage ride through (LVRT); rotor side converter (RSC) coordinated control; doubly-fed induction generator (DFIG); grid side converter (GSC); high voltage ride through (HVRT); low voltage ride through (LVRT); rotor side converter (RSC)
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wang, Y.; Wu, Q.; Xu, H.; Guo, Q.; Sun, H. Fast Coordinated Control of DFIG Wind Turbine Generators for Low and High Voltage Ride-Through. Energies 2014, 7, 4140-4156.

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