A COMPARISON OF D-AXIS STATOR CURRENT CONTROL METHODS FOR TWO PMSG PARALLEL - OPERATED BASED ON WIND TURBINE SYSTEMS SO SÁNH CÁC PHƯƠNG PHÁP ĐIỀU KHIỂN DÒNG STATOR TRỤC D CHO HAI MÁY PHÁT ĐIỆN PMSG VẬN HÀNH SONG SONG TRONG HỆ THỐNG TURBINE GIÓ

Abstract

This paper proposes a study of d-axis stator current control technique for machine side converter in the permanent magnet synchronous generator based on two parallel-operated wind turbine systems which is connected to the grid via back- to-back converters. A reviewed shortly of d-axis stators current control techniques are presented. The zero d-axis stator current (ZDC) control technique is firstly, the second control  is the unity power factor (UPF) control technique and the third is the constant stator flux-linkage (CSF) control technique. The performance of the proposed is assessed and compared through a simulation results based on MATLAB. It has been seen that the d-axis stator current control can not only attended well the maximum power but also can be reduced costly.