Experimental Implementation of The Stator-Side Control of a Grid-Connected Rotor-Tied DFIG-Based WECS

Abstract

In the rotor-tied configuration of the doubly-fed induction generator (DFIG), the rotor is connected to the grid whilst the stator of the DFIG is connected to the grid through a back-to-back converter. In this paper, the modelling and control algorithm of the stator-side converter of a custom-designed S.S-kW rotor-tied DFIG are presented. Furthermore, the performance of the proposed control algorithm is experimentally evaluated during synchronisation and in sub-synchronous operating conditions.