Time delay compensation in solid-state excited autonomous induction generators

In this paper a capacitor emulating solid-state excitation of an autonomous induction generator (IG) is presented. Switching time delay is shown to be the main problem of this approach, causing excess power transfer between the exciting converter and the IG. Four different schemes for compensating switching time delay are explained in detail. Simulation results are presented to show advantages and disadvantages of each scheme. The proposed time delay compensating schemes could be easily implemented using digital signal processor. The presented algorithm could be used in any application employing solid-state excited autonomous IG, for example, wind power conversion.