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Fault Rid Through Protection of DFIG Based Wind Generation System

Author(s): S. Sajedi | F. Khalifeh | T. Karimi | Z. Khalifeh

Journal: Research Journal of Applied Sciences, Engineering and Technology
ISSN 2040-7459

Volume: 4;
Issue: 5;
Start page: 428;
Date: 2012;
Original page

Keywords: Doubly Fed Induction Generator (DFIG)l fault rid through | wind turbine

This study proposes a fault ride-through strategy for a Doubly Fed Induction Generator (DFIG) to enhance network stability during grid disturbances. To enable efficient computation a reduced order DFIG model is developed that restricts the calculation to the fundamental frequency component. However, the model enhancement introduced in the paper allows the consideration of the alternating components of the rotor current as well which is necessary for triggering the crowbar operation. As protection against short circuit transients, the crowbar protection is employed in the simulation. An equivalent model is constructed. Simplifications are made so as to have a system composed of grid, transformer, line and generator represented by elementary circuit elements (R, L, C and voltage sources). Equivalent circuit models are simplified so that the fault models may be used for synchronous machine parameters. It is assumed that the mechanical system cannot respond during the short time of a three phase short circuit. Simulation results in MATLABSimulink software are presented for model verification purposes.

Tango Jona
Tangokurs Rapperswil-Jona

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