A Phase-Domain Induction Machine Modeling Technique by using Magnetic Circuit Representation of Stator and Rotor Windings

Abstract

Induction motors and generators are major devices in power systems, and a high-precision induction machine model is required to perform accurate electromagnetic transient analysis in consideration of them. The electrical behavior of an induction machine can be expressed by circuit equations composed of the winding resistances and the self and mutual inductances of the stator and rotor windings. However, due to the difficulty of solving the circuit equations of the induction machine with the equation of motion of the rotor and the circuit equations of the external system simultaneously, almost all conventional models are implemented in the source code of electromagnetic transient analysis programs. Thus, it was practically impossible for users to improve the models. This paper puts forward an implementation method to express the circuit equations of an induction machine by using only basic circuit components and applying the magnetic circuit expression used for transformer modelling. An induction machine model is developed into XTAP according to the proposed method, and the accuracy of the developed model has been validated in this paper.