The current control regulator parameters effect based on PI + MR of DFIG WT under grid voltage distortion at PCC

Abstract EN

One of the problems that emerged was the quality of the voltage in the network at the point of common coupling (PCC) with the DFIG.

This Investigation studies were undertaken for a 2MW doubly fed induction generator (DFIG) connected to the grid have a background voltage distortion of 5th, 7th, 11th and 13th order harmonics.

In this paper, the suitability of appropriate control schemes to alleviate the problem caused by the voltage distortion in the grid, which is introduce the stator current harmonics in the DFIG wind turbine.

The control techniques to improve the performance of DFIG during voltage distortion in the grid including measures to controlling the grid side converters (GSC) and the rotor side converter (RSC) in a DFIG.

The proposed elimination technique based on rotor current controller employing a proportional integral and multi resonant controller PI+MR to suppress the stator current.

A six and twelve order resonant controller is used to eliminate the positive (7th and 13th) and negative (5th and 11th) current harmonics.

As a result, the impacts of the negative sequence 5th and 11th and positive sequence 7th and 13th voltage harmonic on the stator current are minimized, the THD for the stator current are minimized from 5.63% to 0.37 using PI+MR.