Reducing the effect of total harmonics distortion of synchronous machines

  • Haydar Ahmad H Department of Electrical, College of Engineering, Salahaddin University-Erbil, Kurdistan Region, Iraq
  • Aree Akram M Department of Electrical, College of Engineering, Salahaddin university-Erbil, Kurdistan Region, Iraq
Keywords: Synchronous machines, power system, air gap length & harmonics.


Synchronous machines have a great role in power system generation and controlling, reducing harmonics have been a major concern of researchers, especially with the increasing of electronic equipment and automated controls in addition to use of nonlinear loads in power systems all of these increase additional harmonic generated. In this paper various parameters were investigated such as air gap length, rotor width, rotor diameter, (pole arc / pole pitch) in order to minimize the effect of total harmonics distortion of synchronous machine by utilizing of  MATLAB program.


Abdul Multi , Iwa Garniwa, and Uno Bintang Sudibyo, Determining the Air Gap Length of an Axial Flux Wound Rotor Synchronous Generator, Makara Journal of Technology. Vol 17, No 2 (2013).
Azizi Hossein & Abolfazal Vahedi, Sensitivity analysis and optimum design for the stator of synchronous reluctance machines using the coupled finite element and Taguchi methods, Turkish Journal of Electrical Engineering & Computer SciencesTurk Journal Elec. Eng. & Comp. Science (2015) vol.23-17-27.
Daniel Fallows , Stefano Nuzzo , Alessandro Costabeber & Michael Galea, Harmonic reduction methods for electrical generation: a review. IET Generation, Transmission & Distribution Journal, Volume 12, Issue 13, 31 July 2018, p. 3107 – 3113.
D. M. Holey & V. K. Chandrakar, Harmonic Analysis Techniques of Power System-A Review, International Research Journal of Engineering and Technology (IRJET),Volume: 03 Issue: 02 | Feb-2016.
Eden T. S., ‘Relative merits of Y and delta connection for alternators’, Proc. Am. Inst. Electr. Eng., vol. 33,
no. 5, pp. 791–794, 1914.
Gholamian S.Asghar, M. Ardebili , K. Abbaszadeh and Seyyed Akbar Gholamian,
Optimum Design of Slotted Axial Flux Internal Stator Motor Using Genetic Algorithm for Electric Vehicle, Journal of Software Engineering & Applications (IJSEA), Vol.2, No.3, July 2011.

Hague B., ‘The shape of pole-shoe required to produce a sinusoidal distribution of air-gap flux density’, J. Inst.Electr. Eng., vol. 62, no. 335, pp. 921–929, Nov. 1924.

Hossein Asgharpour-Alamdari ,Yousef Alinejad-Beromi, Reduction in distortion of the synchronous generator voltage waveform using a new winding pattern, IET Electric Power Applications ( Volume: 11 , Issue: 2 , 2 2017 ).

IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems. Recognized as an American National Standard (ANSI) , (Revision of IEEE SM 519-1981.
Karel Hruska, Vladimir Kindl, Roman Pechanek, Pavel Svetlik Design Possibilities of Multiple-Pole Cylindrical Rotor Synchronous Machine Excitation Winding, Industrial Electronics Society, IECON, 40th Annual Conference of the IEEE, At Dallas Conference Paper · February 2014.
Krzysztof Ludwinek, Roman Nadolski, Jan Staszak, Comparison of higher harmonic contents in salient pole synchronous generator with different rotor construction, Archives of Electrical Engineering , VOL. 66(1), pp. 121-139 (2017).
Rakesh Kumar Jha &Arvind S. Pande, Design and Analysis of Synchronous Alternator for Reduction in Harmonics and Temperature by Short Pitch Winding, International Journal of Emerging Technology and Advanced Engineering Volume 3, Issue 10, October 2013.
Stefano Nuzzo , Harmonic Reduction Methods for Electrical Generation. Article in IET Generation Transmission & Distribution · University of Nottingham April 2018 DOI: 10.1049/iet-gtd.2018.0008.
William Mack Grady & Surya Santoso Grady, Santoso, Understanding Power System Harmonics, IEEE Power Engineering Review 21(11):8 - 11 · December 2001.
Xola B. Bomela, M.J. Kamper, Effect of stator chording and rotor skewing on performance of reluctance synchronous machine, IEEE Transactions on Industry Applications, Vol. 38, pp. 91, 2002.
Wang al., ‘Sensitivity Analysis for Performance and Power Density Improvements in Salient-Pole
Synchronous Generators’, in Proceeding of Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD), Nottingham, UK, 2017.
Jos Arrillaga and Neville R. Watson, Power System Harmonics, John Wily & Sons, Chichester, 2004. Second Edition.
How to Cite
Ahmad H, H. and Akram M, A. (2019) “Reducing the effect of total harmonics distortion of synchronous machines”, Zanco Journal of Pure and Applied Sciences, 31(s3), pp. 373-379. doi: 10.21271/ZJPAS.31.s3.53.