Investigation of Harmonics in Power Generating Systems


Article Preview

This paper investigates harmonics in power systems especially harmonics produced by synchronous generators as well as those by distributed generation systems, particularly these days when private generating systems are on the increase in Nigeria. For the work done so far, we found that some generators have near square waves, and these are characterized by their odd harmonics. An investigation of the harmonic emf waves conducted shows that these generators produces harmonic alternating mmf’s and fluxes. All harmonic fluxes produce emfs which are undesirable. The effect of these harmonics results in additional losses, vibration and noise, interferences, and very often stall motors. However the useful torque of a machine is usually produced by the fundamental flux wave which is a pure sine wave. The work is on-going. The waveforms are being analyzed so as to determine the full spectrum of the harmonics present in each case and subsequently investigate their effects in telecommunication systems including the present day GSM.



Advanced Materials Research (Volumes 18-19)

Edited by:

Prof. A.O. Akii Ibhadode




J.O. Emagbetere and P.A. Kuale, "Investigation of Harmonics in Power Generating Systems", Advanced Materials Research, Vols. 18-19, pp. 99-106, 2007

Online since:

June 2007




[1] M.R. Spiegel, Mathematical Handbook of Formulas and Tables,. Schaum Series, McGraw Hill Book Co, Sept. (1977).

[2] Anon., Power quality harmonics, Hershey Energy Systems, New York, (2001).

[3] C. Sankaran, Effects of harmonics on power system, Prism Business Media Inc., (2006).

[4] L.W. Matsch, Electromagnetic & Electromechanical machines, , 2 nd edition, IEP-A DunDonnelley publisher, New York. (1972).

[5] M. Liwschitz-Garik, and C.C. Whipple, Alternating current machines, 2 nd edition, D. Van Nostrand Co. Inc., New York, 1966..