Reduced order models for an induction motor group during bus transfer

A method of modifying the standard reduced-order model of the induction machine to provide improved accuracy during bus transfer of a group of machines with a static load is presented. Two separate modifications are added, one to correct voltage response during the disconnect period and one to improve the mechanical response after reconnect. Accuracy is investigated by a comparison of motor group response during bus transfer using the corrected reduced model, the standard reduced model, and the full-order machine model. It is shown that the corrected model provides improved replication of the full-model voltage during disconnect and current and speed after reconnect. Improved accuracy is obtained through the use of two algebraic correction terms and a state variable change