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Damping torque coefficient affected by different rotor damping structures of turbo-generator during large disturbance

  • Guorui Xu
  • , Jingdi Zhou
  • , Zhiqiang Li
  • , Haisen Zhao
  • , Zhiwei Cao
  • , Jihao Wang
  • North China Electric Power University
  • State Grid Corporation of China
  • Electric Power Research Institute of Shandong Power Supply Company of State Grid

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Damping structures of synchronous generator such as rotor damping bars, iron core and slot wedge can provide positive damping for the dynamic process of power system, while magnetic saturation, distortion and skin effect during the large disturbance process make the three-part damping appear nonlinear. In order to quantitatively describe the strength of three component damping effect during the large disturbance process, the time-step finite element method and the polynomial approximation method are coupled to study the Damping Torque Coefficient (DTC) during the large disturbance caused by the short-circuit fault. The influence of three component damping structure on DTC is studied. The damping strength of each component is obtained by comparing the individual and combined effect of three component damping structure. The results provide theoretical basis to the enhancement of power system stability by improving rotor damping structures of synchronous generators.

Original languageEnglish
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1729-1734
Number of pages6
ISBN (Electronic)9781728103952
DOIs
StatePublished - Sep 2019
Externally publishedYes
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: 29 Sep 20193 Oct 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/TerritoryUnited States
CityBaltimore
Period29/09/193/10/19

Keywords

  • Damping Torque Coefficient (DTC)
  • Damping effect
  • Polynomial approximation method
  • Rotor structure
  • Turbine generator

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