Main Steps and Key Technology of the Simplified Model for Doubly-fed Induction Generator
In view of the complexity and slow calculation of the electromagnetic transient model for doubly-fed induction generator (DFIG),this paper proposes the simplified model.As for the DFIG modules able to be simplified or reduced,it is suggested to simplify or reduce the generator model,shafting model,converter and its control model,respectively,thus obtaining the different simplified models for DFIG.Generator model can be divided into five-order transient model,three-order transient model and singular-order controllable current source model; shafting model the three-mass model,double-mass model and singular-mass block model; the converter and its control model and can be simplified in the steps:replace the converter with controllable voltage source to form electromagnetic simplified model; reptce the generator/converter model with controllable current source to form electromechanical transient model.Thereupon,the key technologies of each link are compared ; the pros and cons of the simplified methods are analyzed.Finally,the related important research topics and directions are expected.
simplified model of wind turbineshafting modelconverter and its control modelgenerator
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