Modelling and Simulation of DFIG for wind energy applications using PWM converters

Abstract

This research work focuses on Double Fed Induction Generator Modelling and Simulation in wind energy conversion system applications. DFIG is one of the most common machines in modern wind power generation because of its capability to operate efficiently for a wide range of wind speeds. The design of the system consists of two back-to-back connected PWM converters through a dc link. In this scheme the stator of DFIG is connected to the grid directly, while rotor connected to the grid through two back-to-back converters and DC Link. A 2 MW DFIG system is modelled and simulated in the specialized power electronics tool PLECS. This work significantly demonstrates the ability to maintain grid stability which has been achieved by simulating the system under three different speeds for both regular and fault conditions. The simulation demonstrates that the system can keep normal grid parameters, manage energy transmission, and smooth transition between sub-synchronous, synchronous and super-synchronous zones, even during disturbances like a three-phase fault.