Simplified d-q dynamic models of the slip energy recovery drive

The issue of the d-q dynamic modelling of the slip energy recovery drive is addressed in this paper. Two original d-q dynamic models are presented, in which the harmonies and commutation phenomena of the rotor converters are neglected. The performance of these models, along with another one already used in the literature, is evaluated through comparison with a detailed mod el of the drive, involving the valve-by-valve representation of the convert ers. one of the novel d-q models proves to be very satisfactory, achieving good accuracy in all cases, while the other two present increased errors of certain disturbances and operating conditions.