Improved high-speed de-excitation system for brushless synchronous machines tested on a 20 MVA hydro-generator

Rebollo López, Emilio and Blanquez, Francisco R. and Platero Gaona, Carlos Antonio and Blázquez García, Francisco and Redondo, Marta (2015). Improved high-speed de-excitation system for brushless synchronous machines tested on a 20 MVA hydro-generator. "IET Electric Power Applications", v. 9 (n. 6); pp. 405-411. ISSN 1751-8660. https://doi.org/10.1049/iet-epa.2014.0313.

Description

Title: Improved high-speed de-excitation system for brushless synchronous machines tested on a 20 MVA hydro-generator
Author/s:
  • Rebollo López, Emilio
  • Blanquez, Francisco R.
  • Platero Gaona, Carlos Antonio
  • Blázquez García, Francisco
  • Redondo, Marta
Item Type: Article
Título de Revista/Publicación: IET Electric Power Applications
Date: 16 April 2015
ISSN: 1751-8660
Volume: 9
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Eléctrica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Synchronous machines with brushless excitation have the disadvantage that the field winding is not accessible for the de-excitation of the machine. This means that, 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. A high-speed de-excitation system for these machines was developed, and this study presents the continuation of a previously published study. This study presents the design by computer simulation and the results of the first commissioning of this de-excitation system in a commercial 20 MVA hydro-generator. The de-excitation is achieved by inserting resistance in the field circuit, obtaining a dynamic response similar to that achieved in machines with static excitation. In this case, a non-linear discharge resistor was used, making the dynamic response even better.

More information

Item ID: 40758
DC Identifier: http://oa.upm.es/40758/
OAI Identifier: oai:oa.upm.es:40758
DOI: 10.1049/iet-epa.2014.0313
Official URL: http://digital-library.theiet.org/content/journals/10.1049/iet-epa.2014.0313
Deposited by: Memoria Investigacion
Deposited on: 09 Jun 2016 09:56
Last Modified: 09 Jun 2016 09:56
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