New Fault-Resistance Estimation Algorithm for Rotor-Winding Ground-Fault Online Location in Synchronous Machines With Static Excitation

Blánquez Delgado, Francisco and Aranda, María and Rebollo López, Emilio and Blázquez García, Francisco and Platero Gaona, Carlos Antonio (2015). New Fault-Resistance Estimation Algorithm for Rotor-Winding Ground-Fault Online Location in Synchronous Machines With Static Excitation. "Ieee Transactions on Industrial Electronics", v. 62 (n. 3); pp. 1901-1911. ISSN 0278-0046. https://doi.org/10.1109/TIE.2014.2336612.

Description

Title: New Fault-Resistance Estimation Algorithm for Rotor-Winding Ground-Fault Online Location in Synchronous Machines With Static Excitation
Author/s:
  • Blánquez Delgado, Francisco
  • Aranda, María
  • Rebollo López, Emilio
  • Blázquez García, Francisco
  • Platero Gaona, Carlos Antonio
Item Type: Article
Título de Revista/Publicación: Ieee Transactions on Industrial Electronics
Date: March 2015
ISSN: 0278-0046
Volume: 62
Subjects:
Freetext Keywords: Alternators; fault detection; fault diagnosis; fault location; generators; protection; rotating machines; rotors
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

This paper presents a new algorithm for estimating the ground-fault resistance value in rotor windings. This new algorithm is an improvement of an online ground-fault location method previously presented. This location method is suitable for synchronous generators with static excitation, whose excitation field winding is fed by controlled rectifiers through an excitation transformer. The estimation of the fault resistance is obtained through the comparison between the third-harmonic voltage measured in a grounding resistance placed in the neutral of the excitation transformer and the third-harmonic voltage calculated by the algorithm. This latter variable is obtained with the dc component of the output voltage of the controlled rectifier and the ac supply voltage of this converter. The fault resistance value is used in the novel technique of online ground-fault location, and it allows improving the accuracy of the location of the defect. This new algorithm, integrated in the complete location method, has been tested with satisfactory results in a 5-kVA laboratory synchronous generator and in a 106-MVA hydrogenerating unit.

More information

Item ID: 41310
DC Identifier: http://oa.upm.es/41310/
OAI Identifier: oai:oa.upm.es:41310
DOI: 10.1109/TIE.2014.2336612
Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6850060&filter%3DAND%28p_IS_Number%3A7035183%29%26pageNumber%3D3
Deposited by: Memoria Investigacion
Deposited on: 27 Jun 2016 15:08
Last Modified: 07 Jun 2019 13:33
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