Zero Direct-axis Current (ZDC) Control for Variable Speed Wind Energy Conversion System using PMSG

Abstract

This paper presents a control scheme for variable speed wind energy conversion system (WECS) using permanent magnet synchronous generator (PMSG). The control scheme extracts maximum power from wind using maximum power point tracking (MPPT) technique. In this paper, the proposed control scheme is achieved using two back-to-back voltage source converters (VSC) with the DC-link whose voltage is to be maintained. The control scheme discussed in this paper is zero direct-axis current (ZDC) control where the d-axis stator current is kept zero. Performance evaluation of the system is carried out and detail simulation results are demonstrated using MATLAB/SIMULINK environment. The simulation results proves the effectiveness of application of the ZDC control for variable speed WECS.