An Induction Generator System Based on Instantaneous Torque Impulse Balance Control (ITIBC)

The induction machine, offering the merits of robust machine structure, brushless construction, and good voltage regulation capability, is a good choice used as a generator in the dc power system. For the induction generator, the instantaneous torque control (ITC) can achieve stable regulation of the output voltage and excellent dynamic performance of the electromagnetic torque. However, the proportional-integral controller of the voltage loop in the ITC can hardly guarantee the optimal dynamic performance of the output voltage, that is, during the response to the load sudden change, the output voltage exhibits several adjustments, overshoot, and relatively long recovery time. To solve this problem, an instantaneous torque impulse balance control (ITIBC) method is investigated in this paper. In the dynamic process, a group of optimal switch vectors is obtained to achieve the shortest recovery time and the minimum number of adjustments of the output voltage without overshoot. Thus, the optimal dynamic performance of the voltage can be achieved for the induction generator system. Simulation and experimental results verify the correctness and effectiveness of the ITIBC method.