A Line Commutated - Thyristor Bridge Emulated Rotating Power Electronic Converter for Brushless Exciter Applications

Manikanta Pallantla, Jeyaram Durga Manian Deivanayagam, Sreekanth Thamballa, Ned Mohan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The reliability of the wound field synchronous machines is improved by the brushless exciter (BLE) rather than using static exciter which requires brushes and slip rings. Conventional BLEs usesa rotating diode bridge rectifier for converting AC to DC voltage. However, these exciters cannot produce a negative voltage across the field winding because of which dynamic response of the field current is very low. The proposed topology in this paper introduces a new line commutated-thyristor bridge emulated power electronic converter that can produce both positive and negative voltage across the field winding of the generator. Also, this topology eliminates the need for a DC-link capacitor which improves the reliability of the BLE system. The proposed topology is simulated in MATLAB-SIMULINK platform and the simulation results for both rectification and inversion mode are presented. Also, a simpler control methodology has been proposed for the BLE with the proposed converter.

Original languageEnglish (US)
Title of host publication2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728171609
DOIs
StatePublished - Nov 9 2020
Event21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020 - Aalborg, Denmark
Duration: Nov 9 2020Nov 12 2020

Publication series

Name2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020

Conference

Conference21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020
Country/TerritoryDenmark
CityAalborg
Period11/9/2011/12/20

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Keywords

  • Brushless exciters
  • electrically excited
  • rotating power electronic converter
  • synchronous machines

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