Design Optimisation and Speed Extension of Wind-Driven Self-Excited Induction Generators-A New Approach

摘要

An economical design of self-excited induction generators has been proposed, which requires only insertion of appropriate stator winding and excitation capacitor, in available well designed induction machines of suitable rating. Using Genetic Algorithm and least pth optimisation techniques, a program has been developed for the calculation of the values of stator turns per coil and the capacitor, satisfying the required performance constraints of the generator, for wind-driven applications. Farther, for obtaining an extended operating speed range of this wind-driven system, a simple stator winding switching scheme for the generator has been suggested, which results in optimum utilization of available wind potential, following cube law power curve. For such variable speed applications, this switching scheme has also been shown to be superior to the earlier methods of employing multiple capacitor connections or pole-changing windings.