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All Journal International Journal of Electrical and Computer Engineering TELKOMNIKA (Telecommunication Computing Electronics and Control)
Mangalpady Aruna
National Institute of Technology Karnataka
Computer Science & IT Electrical & Electronics Engineering

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Study of Performance of a Power Station for Operational Optimisation Sunil M. Jaralikar; Mangalpady Aruna
International Journal of Electrical and Computer Engineering (IJECE) Vol 2, No 1: February 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.759 KB)

Abstract

Undertaking regular performance analysis of a power station is very much necessary for its operational optimization. In this regard as a case study a 630 MVA, 400/220 kV power station was identified and analysed to study its performance. The study shows that the installed station (transformer) capacity is very large compared to the load it had to supply, and also it is under loaded and underutilized for the major period of its operation. Due to this the operational efficiency of the station was reduced and also the incoming voltage level was higher than the voltage for which the station was designed. During off peak loading condition, one of the 400 kV incoming lines was being tripped, thus risking the supply reliability. This case study emphasizes and suggests few ways for improving the performance and loading pattern of the power station by optimization of its operational parameters. Keywords: Bus reactor; Energy audit; Energy efficiency; Performance analysis; Station capacity.DOI:http://dx.doi.org/10.11591/ijece.v2i1.118
Design of Lighting System for Surface Mine Projects Mangalpady Aruna; Sunil M Jaralikar
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 10, No 2: June 2012
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v10i2.782

Abstract

 Indian mining illumination standard is based on incident light without mentioning about uniformity ratio, but International Commission on Illumination (CIE), Austria insists uniformity ratio. In a mine with low surface reflectance, the surrounding illumination level is lower than the minimum lighting standard as specified by various regulatory bodies. The surface brightness further reduces in wet surface condition, and results in poor visibility. In the present study, design was made both in mineral and overburden benches based on the minimum acceptable reflected light and the reflected uniformity ratio. For the purpose of comparison of various types of lighting systems, a stretch of 1.0 km long haul road was considered. The design was attempted with five different types of luminaries. Lamp mounting heights were varied at five steps, namely 8, 10, 12, 14 and 16 m. Design under wet condition incurs an excess cost 9.4 % for mineral bench and 50 % for overburden bench haul roads. Designing under wet surface condition ensures the minimum light level even under the worst condition of surface reflectivity, with marginal increase in cost.
Co-Authors Sunil M Jaralikar Sunil M. Jaralikar