Analyzing the Effect of Ambient Temperature and Loads Power Factor on Electric Generator Power Rating

Authors: Ahmed Elsebaay, Maged A. Abu Adma, Mahmoud Ramadan

Abstract:

This study presents a technique clarifying the effect of ambient air temperature and loads power factor changing from standard values on electric generator power rating. The study introduces an optimized technique for selecting the correct electric generator power rating for certain application and operating site ambient temperature. The de-rating factors due to the previous effects will be calculated to be applied on a generator to select its power rating accurately to avoid unsafe operation and save its lifetime. The information in this paper provides a simple, accurate, and general method for synchronous generator selection and eliminates common errors.

Keywords: Ambient temperature, de-rating factor, electric generator, power factor.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1340040

References:

[1] http://www.china-dieselgenerator.com/generator-selection.html, October 2016.
[2] Mukesh Kumar Kirar and Ganga Agnihotri, “Emergency Generator Sizing and Motor Starting Analysis”, International Journal of Electrical, Computer, Electronics and Communication Engineering Vol:7 No:1, 2013.
[3] “Silvi's Emergency Power Tips: Properly sizing a Genset”, http://www.kentechpower.com/emergency-power-tips/, September 2016.
[4] Jim Iverson, “Power topic #7007: How to size a genset”, http://power.cummins.com/, October 2016.
[5] “IEEE Recommended Practice General Principles for Temperature Limits in the Rating of Electrical Equipment and for the Evaluation of Electrical Insulation”, IEEE Std 1-2000(R2011).
[6] “NEMA MG-1: Motors and Generators”, 2014.
[7] “Diesel Generator Power Factor and Efficiency”, https://zenatix.com/diesel-generator-power-factor-and-efficiency, October 2016.
[8] P.Kundur, “Power System Stability and Control”, New York: McGrawHill, ISBN 0-07-035958-X, 1994.
[9] http://new.abb.com/motors-generators/generators/generators-for-diesel-and-gas-engines/low-voltage-generators-for-industrial-applications/amg-0355?_ga=1.78441686.39063645.1473974022, November 2016.
[10] http://new.abb.com/motors-generators/generators/generators-for-diesel-and-gas-engines/low-voltage-generators-for-industrial-applications/amg-0450, November 2016.