Indirect power control for a Grid Connected Double Fed Induction Generator Based Wind Turbine Emulator

Abstract

This paper describes a simple indirect power control (IPC) strategy for the machine side converter (MSC) of a grid connected double fed induction generator DFIG based wind energy conversion chain system (WECS). The principle of the algorithm requires application of the field oriented control (FOC) in the dq reference frame on the DFIG model, in order to control the stator power (active Ps and reactive power Qs) instantly and independently by acting on the rotor current components ($I_{qr},\ I_{dr})$ respectively. The proposed structure is simulated using MATLAB Simulink, the obtained results are validated experimentally on our laboratory bench. We also develop an application with MATLAB AppDesigner that calculates the operating point of our system at steady state and visualize the power transfer, current, voltage and electromagnetic torque values of the DFIG before starting the stimulation or the experimental manipulation.