The work presents the development and investigation in MATLAB of a model of an autonomous self-excited induction generator with a rotor circuit inverter for a wind turbine. The system employs a scalar-controlled inverter with an independent power supply, and the nonlinear magnetization curve of the induction generator is taken into account. Voltage and frequency regulation are separated. The developed model made it possible to study the self-excitation mode for different rotor supply frequencies. During the simulation of the self-excitation process of the autonomous induction generator, it was found that the optimal parameters for stable self-excitation were achieved at a rotor frequency of 1.8 Hz and a rotor supply voltage of 20 V. The study also examined the effect of applying an active-inductive load and the system’s response to changes in the drive shaft speed. When a 40% load of the rated value was connected, a slight voltage drop accompanied by an increase in the rotor phase current was recorded; however, the system remained stable without the need for additional control measures. By increasing the inverter voltage, the generator terminal voltage was restored to its initial level. When the drive shaft speed was suddenly reduced by 10%, a minor voltage decrease and a corresponding increase in rotor current were also observed. This mode remained stable, and the voltage and frequency were successfully leveled again by means of the inverter.
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