SOLID-STATE CONTROL OF A WIND-DRIVEN SELF-EXCITED INDUCTION GENERATOR

The paper analyses a system of autonomous induction generator directly feeding, without a d.c link, an induction motor. The generator is dri ven by a wind energy turbine and the motor is driving a water pump. Th e analysis is based upon a mathematical model that accounts for the va rious nonlinearities and mutual interactions of the system elements. I nvestigations of such a system revealed that it can be controlled to e xtract the maximum available wind energy by proper adjustment of the t erminal voltage of the generator. The required control strategy is for mulated, then it is implemented by a static VAR controller which suppl ies the induction generator with necessary reactive power.