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Journal of Failure Analysis and Prevention

, Volume 19, Issue 2, pp 488–495 | Cite as

Evaluation of Failure and Repair of the Jebba and the Shiroro Hydroelectric Power Stations

  • C. T. ThomasEmail author
  • O. Ogunbiyi
  • M. F. Akorede
  • B. Yahaya
  • K. O. Alabi
  • B. J. Olufeagba
Technical Article---Peer-Reviewed
  • 41 Downloads

Abstract

Nigeria power generation hovers around 7000 MW as at January 2019; this is far less than the national required electricity per capita value. Jebba Hydroelectric Power Station (JHEPS) and Shiroro Hydroelectric Power Station (SHEPS) are two of the three major hydropower stations in the country in which their maximum average generation values are still less than the rated values of 578.4 MW and 600 MW, respectively. This paper presented some basic concepts of analysis of failure and repair. An algorithm was set up to extract the contiguous set of uptimes and downtimes to determine time-between-failures (TBF) and time-between-repairs (TBR) events; these events were analyzed for the stochastic study. It was observed that the longest uptime was 262 days and seen in turbo-alternator unit five, while the shortest was zero day and seen in the entire units except that of unit two. For JHEPS, the longest downtime was 133 days and seen in the turbo-alternator of unit one, and the least time-between-repairs is a day and common to all the units. The frequency distributions for both TBF and TBR showed that 79% of TBF events and 57% of TBR events are distributed in the first two classes. For SHEPS, unit 3 was found to have the longest TBF with a value of 46 days, while the least was found in unit 1 with a value of 17 days.

Keywords

Uptime Hydroelectric Turbo-alternator Time between failures Time between repairs Contiguous state Useful life 

Notes

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Copyright information

© ASM International 2019

Authors and Affiliations

  1. 1.Department of Electrical and Information EngineeringAchievers UniversityOwoNigeria
  2. 2.Department of Electrical and Computer EngineeringKwara State UniversityMaleteNigeria
  3. 3.Department of Electrical and Electronics EngineeringUniversity of IlorinIlorinNigeria
  4. 4.Department of Geology and Mineral ScienceKwara State UniversityMaleteNigeria
  5. 5.Department of Computer ScienceKwara State UniversityMaleteNigeria

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