Theoretical research on short circuit fault of rotor inner winding in large turbo generator

Bin Qin, Wei Xu, Nian Liu, Yunhong Zhang, Jiefeng Hu, Jianguo Zhu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper analyzes the rotor magnetic potential distribution of one large turbo generator both in normal and rotor inner winding short-circuit fault states. By the influence of short fault, the second harmonic current of the stator winding will induce one half and one two-third harmonic currents to the stator winding and the rotor winding respectively. Furthermore, it also analyzes theoretically the effect of inter-turn short circuit on characteristic parameters, which include the stator current, the stator voltage, the rotor current, the rotor voltage, and the active/reactive power. Then a method is proposed to predict or identify different practical faults in details, which is on the base of the relative variation laws of those characteristic parameters varying with the severity of the rotor inter-turn short circuit fault. The fault criterion of rotor inter turn short-circuit on-line identification has been investigated, which can estimate different types of faults. Finally, theoretical analysis based on simulation in Simulink/Matlab is carried out by using the dynamic short-circuit model of large turbo generator units. This paper could give good guidance for the judgment of the rotor inner winding short-circuit fault of large turbo generator by the right choice of characteristic parameters.
Original languageEnglish
Title of host publicationProceedings, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
Pages6218-6223
Number of pages6
DOIs
Publication statusPublished - 1 Dec 2012
Externally publishedYes
Event38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012 - Montreal, QC, Canada
Duration: 25 Oct 201228 Oct 2012

Conference

Conference38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012
Country/TerritoryCanada
CityMontreal, QC
Period25/10/1228/10/12

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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