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Modeling adjustable-speed drives with long feeders

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3 Author(s)
A. C. S. De Lima ; Dept. of Electr. Eng., Fed. Univ. of Rio de Janeiro, Brazil ; H. W. Dommel ; R. M. Stephan

This paper presents the modeling of different topologies of electric drive systems when the cable that connects the converter to the motor has a significant length. The long feeder together with converter harmonics decrease the performance of the motor. To correctly assess the voltage and the current throughout the drive system, frequency-dependent models for the cable and the motor should be used. A frequency-dependent cable model is necessary for an accurate voltage evaluation while a frequency-dependent motor model responds for accuracy in the current. The models were validated through experimental results carried out on an actual oil platform and from a prototype system. The latter system was used to test the system's performance when very long motor leads (longer than 5 km) are involved

Published in:

IEEE Transactions on Industrial Electronics  (Volume:47 ,  Issue: 3 )