Nonlinear Circuit Elements Influence on the Power Network
Journal Title: Acta Marisiensis. Seria Technologica - Year 2018, Vol 15, Issue 1
Abstract
This paper presents the most important nonlinear circuit elements, the equivalent circuits and the causes of nonlinearity. This is important because the power quality in the power network is strongly influenced by the nonlinear characteristics of the elements and nonlinear functions of different equipments. Some circuits and circuit elements, transformers, induction motors, frequency converters, were studied. The voltage and the current waveform were analysed and the frequency spectra were shown to establish the most considerable harmonics. It is important to study the nonlinear circuits and analyze the harmonic spectra of the distorted current for different inductive load to design the right filter for reducing or eliminating the harmonics. The theoretical background of the distorting state is also presented, what kind of losses appear, and how these losses influence the harmonics. It is shown the reason for what coil and capacitor have nonlinear characteristics and by what is expressed.
Authors and Affiliations
Katalin Agoston
Keywords
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