Harmonics in Power Systems and Filter Applications

Öz

With the advancing technology, loads in the system have been varied. These loads are always asked to be linear. However, with the effect of progressive semiconductor technology, an increase in nonlinear loads has been observed in the system. Nonlinear loads are loads whose current and voltage characteristics are nonlinear. Nonlinear loads cause harmonic currents and voltages in the system. Major loads causing harmonics are power electronic components, transformers, uninterruptible power supplies (UPS), converters and high-power induction motors. Harmonics cause additional energy losses in the system, heating and damage to the insulation. For these reasons, it is important to reduce or eliminate harmonics after formation or to block them before the formation. The most important method for eliminating harmonics is the filtering of harmonics with filters. In this study, firstly, it is given basic information about harmonics, their effects on energy system, filtering methods. Then, a sample system model is performed in MATLAB program and the effect of passive filters is examined.

Anahtar Kelimeler

• Harmonic analysis,filter circuit,resonance circuits

Kaynakça

1. C. Kocatepe, M. Uzunoğlu, R. Yumurtacı, Harmonics in Electrical Installations”, Birsen Press., Istanbul, 2003.
2. I. İlaslaner, “Harmonics and Filtering in Power Systems”, Master Thesis, Gazi University, Ankara,2006
3. M. Sucu, “Computer Aided Modeling and Simulation of Harmonics in Electric Energy Systems”, Master Thesis, İstanbul Unv., 1993.
4. S.B. Efe, “Harmonic filter application for an industrial installation”, 13th Int. Conf. on Engineering of Modern Electric Systems (EMES), pp.1-4, 2015.
5. A.B. Yildiz,’’Electric Circuits”, Part II, Volga Press, Kocaeli, 2016.
6. M.L.Jiangzi, “Application of adaptive filtering in harmonic analysis and detection”, IEEE PES Transmission & Distribution Conf. & Exp., Asia and Pacific, pp.1-4, 2005.
7. L.Motta and N. Faundes, “Active/passive harmonic filters: Applications, challenges & trends”, 17th Int. Conf. on Harmonic and Quality of Power (ICHQP), pp.657-662, 2016.
8. R.O. Abdelqader, “Method to model active harmonic filter in harmonic simulation packages”, 13th Int. Conf. on harmonics and quality of power.pp.1-6, 2008.

9. M.H. Abbas, “Total harmonic distortion analysis simulation”, Int. Conf. on Power System Technology. Proceedings, pp.1631-1634, 2000.
10. J.Z.Yang, C.S.Yu, C.W.Liu, “A new method for power signal harmonic analysis”, IEEE Transactions on Power Delivery, Vol.20, Issue 2, pp.1235-1239, 2005.