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A Voltage-Behind-Reactance Induction Machine Model for the EMTP-Type Solution

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4 Author(s)
Liwei Wang ; Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC ; Juri Jatskevich ; Chengshan Wang ; Peng Li

Recently, there has been renewed interest in modeling of electrical machines for the electro-magnetic transient program (EMTP)-type programs, with the goal of improving the machine- network interface. In this paper, we present a new voltage-behind- reactance induction machine model for the EMTP-type solution and power system transients. In the proposed model, the stator circuit is represented in abc phase coordinates and the rotor subsystem is expressed in qd arbitrary reference frame. Similar to the recently proposed synchronous-machine voltage-behind-reactance model and the established phase-domain model, simultaneous solution of the machine-network electrical variables is achieved. Efficient numerical implementation of the proposed model is presented, in which one time-step requires as little as 108 flops, taking 1.6 mus of CPU time. Case studies of induction machine start-up transients demonstrate that the proposed model is more accurate and efficient than several existing EMTP machine models.

Published in:

IEEE Transactions on Power Systems  (Volume:23 ,  Issue: 3 )