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Modeling and Analysis of Doubly Fed Induction Generator Wind Energy Systems by Zhixin Miao, Lingling Fan

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Chapter 6

Frequency-Domain Based DFIG Wind Energy Systems Modeling

Abstract

This chapter presents frequency-domain based modeling techniques for doubly fed induction generator (DFIG) wind energy systems. Two types of frequency-domain modeling approaches are presented. The first type is impedance model. Impedance represents the ratio of the terminal voltage and the through current of a device in frequency domain. Using impedance models, a circuit analysis problem is converted to a feedback control system problem. Resonances can be identified using tools for control systems, for example, Nyquist stability criteria and Bode plots. The positive-sequence impedance model for a Type-3 series compensated wind energy system is developed. Subsynchronous ...

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