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A Voltage Vector Synchronization Method for a Renewable Energy System with a Doubly-Fed Induction Generator  

Park, Jung-Woo (한국전기연구원 전동력연구그룹)
Lee, Ki-Wook (한국전기연구원 전동력연구그룹)
Kim, Dong-Wook (한국전기연구원 전동력연구그룹)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.3, 2007 , pp. 547-555 More about this Journal
Abstract
In order to transmit energy generated through the stator winding of a doubly-fed induction generator (DFIG), we need to synchronize the generated voltage vector with the grid voltage vector. However, the existing synchronization methods work only when the encoder is installed at a specific position and equivalent constant is precise. In order to solve this problem, a new synchronization method has been proposed and a way of applying the method to existing doubly-fed induction generator control algorithm has been also proposed. The validities of the methods proposed were verified by using a prototype converter for a 1.5MW-class doubly-fed induction generator and experimental results showed the validity of that against variation of an encoder positions, generator parameters, and grid voltages.
Keywords
Wind Turbine; Tidal Current Power Plant; DFIG; Power Control; Grid Interconnrction;
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