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High-speed de-excitation system for brushless synchronous machines

C.A. Platero, M. Redondo, F. Blázquez, P. Frías

This study presents a novel high-speed de-excitation system for brushless synchronous machines, where the de-excitation time constant can reach values of several seconds. In these conditions, despite the proper operation of the protection system, the slow de-excitation time constant may produce severe damage in the event of an internal short circuit. With the proposed system, a rapid de-excitation is achieved by inserting a resistance in the field circuit, obtaining a response similar to that in machines with static excitation. This system has been validated through computer simulations and experimental laboratory tests.


IET Electric Power Applications. Volume: 6 Issue: 3 Pages: 156-161

JCR Impact Factor and Scopus quartile: 1.562 - Q1 (2012); 2.211 - Q1 (2017).

DOI reference: DOI icon 10.1049/iet-epa.2011.0088    

Published on paper: March 2012.

    Topics research:
  • *Steady-state: load flows, analysis of power system constraints, optimal load flows, voltage control ancilliary service,short-circuits, protections in transmission and ditribution networks

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