Thyristor Controlled Based Reactive Power Control for a Grid Voltage Oriented Vector Doubly Fed Induction Machine

Abstract

Electric power generation through wind turbine is growing rapidly every year and India plays a major role in generating electric power through wind turbine. In India almost 25GW of electric power is being generated every year through wind turbine. Also, wind energy is very clean, reliable and is available by a very vast amount. In this paper, mathematical model of DFIM, back to back converters along with DC link capacitor and a thyristor controlled reactor to adjust the reactive power control of wind turbine has been presented. The wind turbine speed is controlled by controlling the pitch angle control. Grid voltage oriented vector control is used to control the DC link voltage and control the flow of active power to the grid. PWM with third harmonic injection is used to generate switching pulses for the converters. Analysis of DFIM is done in both open and closed loop configurations of converters, at different wind speeds. All the simulation is carried out in Matlab/Simulink.