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An Equivalent Model of Doubly-Fed Wind Generation System
Pages: 210-217
Year: Issue:  8
Journal: Transactions of China Electrotechnical Society

Keyword:  Distributed generationload modelingDFIGequivalent modeldifferential equation;
Abstract: In order to study the characteristics of generalized integrated load containing distributed doubly-fed wind power generation system in the distribution network, this paper proposes a three-order induction motor comprehensive equivalent model of a doubly-fed wind power generation system. The equivalent circuit, static power characteristics and control strategy of the doubly fed induction generator(DFIG) power generation system are firstly analyzed; on this basis, the structural characteristics and parameter identification of DFIG generation system are discussed. Then, an internal feedback link is introduced in the output equation to improve the equivalent model’s description of dynamic characteristics of DFIG, and the physical meaning of the improved model are explained from mechanic perspective. Finally, the validity of the model is verified through a series of modeling and simulation experiments.
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