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Low voltage ride-through enhancement of DFIG-based wind turbine using DC link switchable resistive type fault current limiter

Citation

Naderi, SB and Negnevitsky, M and Jalilian, A and Hagh, MT and Muttaqi, KM, Low voltage ride-through enhancement of DFIG-based wind turbine using DC link switchable resistive type fault current limiter, International Journal of Electrical Power and Energy Systems, 86 pp. 104-119. ISSN 0142-0615 (2017) [Refereed Article]

Copyright Statement

Copyright 2016 Elsevier Ltd. All rights reserved.

DOI: doi:10.1016/j.ijepes.2016.10.001

Abstract

Doubly-fed induction generator (DFIG)-based wind turbines utilise small-scale voltage sourced converters with a limited overcurrent withstand capability, which makes the DFIG-based wind turbines very vulnerable to grid faults. Often, modern DFIG systems employ a crowbar protection at the rotor circuit to protect the rotor side converter (RSC) during grid faults. This method converts the DFIG to a squirrel cage induction generator, which does not comply with the new grid codes. The recent grid codes need wind turbines to stay connected to the utility grid during and after power system faults, especially in high penetration level of wind power. Furthermore, the crowbar switch is expensive. This paper proposes a novel DC-link switchable resistive-type fault current limiter (SRFCL) to improve the LVRT capability of the DFIG. The proposed SRFCL is employed in the DC side of the RSC. The SRFCL solves crowbar protection activation problems and eliminates subsequent complications in the DFIG system. The proposed SRFCL does not have any significant impact on the overall performance of the DFIG during normal operation. Whenever the fault, whether symmetrical or asymmetrical, occurs, the SRFCL not only limits rotor over-currents but also prevents rotor speed acceleration and restricts high torque oscillations even during zero grid voltage, as recommended by some grid codes. To prove the effective operation of the SRFCL on the RSC fault current limitation, analytical analysis is performed in each switching interval. The proposed approach is compared with the crowbar-based protection method. Simulation studies are carried out in PSCAD/EMTDC software. In addition, a prototype is provided to demonstrate the main concept of the proposed approach.

Item Details

Item Type:Refereed Article
Keywords:low voltage ride-through, DFIG, DC link, switchable resistive type fault current limiter
Research Division:Engineering
Research Group:Electrical and Electronic Engineering
Research Field:Control Systems, Robotics and Automation
Objective Division:Manufacturing
Objective Group:Machinery and Equipment
Objective Field:Machinery and Equipment not elsewhere classified
UTAS Author:Naderi, SB (Dr Seyedbehzad Naderi)
UTAS Author:Negnevitsky, M (Professor Michael Negnevitsky)
ID Code:124525
Year Published:2017
Web of Science® Times Cited:23
Deposited By:Engineering
Deposited On:2018-02-23
Last Modified:2018-07-30
Downloads:0

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