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Title: Control Strategy of a Dc-Link Brake Chopper for Low-Voltage-Ride-Through in Doubly Fed Induction Generator
Authors: R. Karthick; S. Manoharan ; R.Ganesh
Aff: Department of EEE, SNS College of Technology, Coimbatore, Tamilnadu, India -641035
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Keywords: Doubly Fed Induction Generator (DFIG); DC Brake Chopper; Induction Generators; Power Conversion; Wind Power Generation
Abstract:Due to proliferation of wind turbines, the performance of DFIG during grid fault is attracting much interest. During a fault, the international grid codes specify that the generator must exhibit a fault ride through (FRT) capability by remaining connected and contributing to network stability. To protect the rotor converter during a fault, many DFIG systems employ a rotor circuit crowbar. It can be also used to protect the generator but it does not provide favorable grid support behavior. To ensure the dc-link voltage under control during a fault, this paper describes an alternative method FRT approach using a brake chopper circuit across the converter dc link.