NDLI: Short-circuit current reduction techniques of the doubly-fed induction generator based wind turbines for fault ride through enhancement

Content Provider	IET Digital Library
Author	Naggar, Ahmed El Erlich, Istvàn
Abstract	Grid voltage disturbances result in high magnitudes of rotor currents and DC-link voltage of the doubly-fed induction generator based wind turbines (DFIG-WTs), which may lead under severe fault conditions into deactivation of the machine side converter (MSC) and violation of the fault ride through (FRT) requirements of the grid codes. In this essence, several solutions were proposed, which vary between installing extra hardware components and control modification. However, the extra costs as well as the control limitations degrade the feasibility of the proposed solutions. In this study, new techniques are proposed to enhance the FRT through peak short-circuit current reduction of the DFIG-WT. The new techniques are developed based on the open-loop and close-loop dynamic response of the DFIG. The new techniques utilise the available MSC voltage, in order not to violate the voltage limits, to increase the rate of change of the DFIG internal transient voltage and to increase the magnitude of the transient impedance. Additionally, the mean variance mapping optimisation is used to optimally tune the gains in the second two techniques. The new techniques were implemented in a manufacturer-based simulation model, and the simulation results show their effectiveness, where the maximum peak current reduction achieved was 23.6%.
Starting Page	1033
Ending Page	1040
Page Count	8
ISSN	17521416
Volume Number	11
e-ISSN	17521424
Issue Number	Issue 7, Jun (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/11/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2016.0372
Journal	IET Renewable Power Generation
Publisher Date	2017-04-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asynchronous Generator Asynchronous Machine Close-loop Dynamic Response DFIG Internal Transient Voltage DFIG-WTs Doubly-fed Induction Generator Based Wind Turbines Dynamic Response Fault Ride Through Enhancement FRT Grid Code Grid Voltage Disturbances Machine Side Converter Manufacturer-based Simulation Model Mean Variance Mapping Optimisation MSC Open-loop Dynamic Response Optimisation Optimisation Technique Power Converter Power Generation Fault Power Grid Power Supplies to Apparatus Power System Transients Rotor Current Magnitude Rotors Short-circuit Current Short-circuit Current Reduction Technique Transient Impedance Magnitude Wind Power Plant Wind Turbine
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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