Investigation on Effect of Aged Pumped-Storaged Component Replacement on Economic Profits Considering Reliability and Economic Efficiency

Jong Sung Kim
Sunchon National University, Suncheon, Republic of Korea

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110571424

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:7, s. 1424-1431

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Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


Recently; availability decrease due to increase of midnight electric power demand has risen necessities to improve economic efficiency of the pumped-storage power plants in South Korea. The necessities cause to extend a preventative maintenance cycle; especially an overhaul cycle. But; unconditional extension cannot be implemented because it may generate unanticipated failures due to insufficient maintenance. So; first; in this study; possibility of extension of the preventative maintenance cycle is identified via investigation on preventative maintenance situation of overseas and domestic hydropower plants. Second; a methodology to optimize the preventative maintenance cycle considering both reliability and economic efficiency is presented via review of the previous reliability studies and considering characteristics of the pumped-storage power plant. The methodology consists of the eight parts including selection of principal components and subcomponents; identification of damage mechanisms in the principal components/subcomponents; FMEA(failure mode effect analysis); derivation of replacement and repair time of the principal components/subcomponents; design of preventative maintenance cycle plan; reliability analysis; economic assessment; and derivation of the optimized preventative maintenance cycle. Also; as a result of application of the methodology to an aged pumped-storage power plant in South Korea; the overhaul cycle has been extended from 4 years to 7.5years. Last; effect of replacement of some aged principal subcomponents such as rotor runner and generator stator on economic profits is investigated via application of the methodology to the aged pumped-storage power plant.


Pumped-Storage Power Plants; Replacement; Preventative Maintenance; Reliability; Economic Efficiency


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