Analysis of Torsional Stress and Fatigue of Turbine-Generator Shafts during Islanding

Bombay Babi, Pitshou Bokoro

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

Abstract

Power system disturbances induce transient torques, which may overstress turbine-generator shafts and shorten their fatigue life. This work analyses torsional stress and fatigue life loss of turbine generators subsequent to unintentional islanding in a network. The analysis was conducted using time domain simulation with PSCAD and an analytical method for fatigue estimate of turbine-generator shafts. Islanding termination and operation after islanding termination are identified as the two events that pose the biggest threats to shaft fatigue life. It is shown that the risk of early shaft damage is averted when the turbine-generator islands on a local load whose size is bigger than a critical value.

Original languageEnglish
Title of host publication2020 IEEE PES/IAS PowerAfrica, PowerAfrica 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728167466
DOIs
Publication statusPublished - Aug 2020
Event7th Annual IEEE PES/IAS PowerAfrica Conference, PowerAfrica 2020 - Virtual, Nairobi, Kenya
Duration: 25 Aug 202028 Aug 2020

Publication series

Name2020 IEEE PES/IAS PowerAfrica, PowerAfrica 2020

Conference

Conference7th Annual IEEE PES/IAS PowerAfrica Conference, PowerAfrica 2020
Country/TerritoryKenya
CityVirtual, Nairobi
Period25/08/2028/08/20

Keywords

  • fatigue
  • generator
  • islanding
  • shaft
  • turbine

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Geography, Planning and Development
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering

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