Modelling and simulation of wind turbine based induction generator model using MATLAB/Simulink

In wind turbine (WT) system, the generator is the main component as it is used to convert the mechanical energy into the electrical energy. Mostly the fault happen in wind turbines was due to broken in the generator. Thus, the study of the generator model in wind turbines becoming more important to know the detailed characteristic of the generator to prevent the fault in wind turbines. The goal of this project is to develop a mathematical model of a generator in wind turbines that can be easily adjustable to apply any fault in the generator for WT dynamic system study. This is due to most of the developed WT models are either intellectual property protected or too simple in generator modelling. In this project, the mathematical model of wind turbine-based induction generator was developed using MATLAB/Simulink. The developed model wind turbine consists of aerodynamic model, wind turbine drive train based on a two mass models and induction generator model. The induction generator was developed based on electrical equations in Park’s reference frame. The model consists of electrical and mechanical subsystem. Then, the proposed model of the wind turbine with an induction generator was validated by using a wind farm with a doubly-fed induction generator (DFIG) detailed model in MATLAB software. The simulated response of mechanical torque, electrical torque, generator speed and power for both models was compared. The result shows that the simulated responses for both WT model had the same shape of the waveform which show the same dynamic behavior, even-though the steady-state values were not the same due to different setting or rating. In conclusion, the mathematical model of wind turbine system based on induction generator for fault study was successfully developed.