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General Information
    • ISSN: 1793-8198
    • Frequency: Quarterly
    • DOI: 10.18178/IJMMM
    • Editor-in-Chief: Prof. K. M. Gupta, Prof. Ian McAndrew
    • Executive Editor: Ms. Cherry L. Chen
    • Abstracting/Indexing: EI (INSPEC, IET), Chemical Abstracts Services (CAS), Engineering & Technology Digital Library,  ProQuest, Crossref, Ulrich's Periodicals Directory, DOAJ, and Electronic Journals Library .
    • E-mail ijmmm@ejournal.net
Editor-in-chief
Prof. Ian McAndrew
Embry Riddle Aeronautical University, UK.
It is my honor to be the editor-in-chief of IJMMM. I will do my best to help develop this journal better.

IJMMM 2016 Vol.4(4): 288-293 ISSN: 1793-8198
DOI: 10.18178/ijmmm.2016.4.4.273

Strategic Consideration and Numerical Simulation on Life Extension and Uprating of 25 Years Services Life Coal Fired Generator

Imam Djunaedi, Hilman Syaeful Alam, and Aditya Sukma Nugraha
Abstract—A 471,000kVA Inner-Cooled Turbine Generators, 23kV, .85PF, 3 phases, 50 hertz, 3000 rpm with manufacturing year in 1987, the generator has the service life at over 25 years. The insulation is assumed that is not in an acceptable condition for long term operation and therefore arranges to be performing Life Extension program which will comprise of a full Rewinding of Generator Stator and Generator Rotor. A design margin of the generator should be increased to 494,550 kVA from the current design margin of 471,000 kVA, while maintaining the 0.85 power factor. As justification for the Life Extension program, it will require of life assessment. Then a design review of the generator due to increase a design margin needs to be done by determining the performance and life extension of the generator prior to refurbish or uprating. A design review and feasibility study in order to extend the operating life and increase the capability and reability of the generator are performed by using numerical simulation on magnetic analysis, thermal analysis and rotor dynamic analysis. Therefore, the increasing a design margin on the generators from the current design of the margin will not pose a problem as long as all of the following recommendations can be implemented.

Index Terms—Generator, insulation, life assessment, life extension, refurbishment, repair, uprating.

Imam Djunaedi is with the Research Center of Physics, Indonesian Institute of Sciences, Jl. Sangkuriang Komp. LIPI Gd. 80, Bandung, 40135, Indonesia (email: imam003@lipi.go.id; imam_djunaedi@yahoo.com).
Hilman Syaeful Alam is with the Technical Implementation Unit for Instrumentation Development, Indonesian Institute of Sciences, Jl. Sangkuriang Komp. LIPI Gd. 30, Bandung, 40135, Indonesia.
Aditya Sukma Nugraha is with the Research Center for Electric Power and Mechatronics, Indonesian Institute of Sciences, Jl. Sangkuriang Komp. LIPI Gd. 20, Bandung, 40135, Indonesia.

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Cite: Imam Djunaedi, Hilman Syaeful Alam, and Aditya Sukma Nugraha, "Strategic Consideration and Numerical Simulation on Life Extension and Uprating of 25 Years Services Life Coal Fired Generator," International Journal of Materials, Mechanics and Manufacturing vol. 4, no. 4, pp. 288-293, 2016.

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