A Robust Power Control of a DFIG used in Wind Turbine Conversion System

Abstract

This paper presents a robust power control of a doubly fed induction generator (DFIG) used in Wind Energy Conversion Systems (WECS) based on the active disturbance rejection control (ADRC) connected to the grid power. In this article we present the performance and robustness of ADRC compared to other controllers regulators such as the polynomial controller RST applied to powers control for DFIG. The proposed control strategy employs ADRC based on Extended State Observer (ESO) scheme to directly calculate the required rotor control voltage in order to eliminate the instantaneous errors of active and reactive powers. Listed in this paper are the advantage, performance and robustness of the Active Disturbance Rejection Control. First, we present a model of wind turbine and DFIG machine, then a synthesis of the controllers and their application in the DFIG power control. Simulation results on a 1.5MW grid-connected DFIG system are provided by MATLAB/Simulink.