Communication angle analysis of a double output induction generator operating in sub- and super-synchronous modes

A rigorous performance analysis of the double output induction generator system with two controlled converters has been carried out including the effects of both the rotor side converter´s commutation angle and harmonics as well as the supply side converter´s harmonics. This is achieved by means of the hybrid induction machine model which allows for the changing states of conduction of the rotor side converter´s thyristors. The variations in overlapping angle of the rotor side converter is obtained for a wide range of shaft speeds and for various firing delay angles.