What is it about?

The purpose of the work is to refine the calculating method of the nonlinear electric circuits by taking into account the power components on the semiconductor elements. So the both a classical instantaneous power method and a method based on equations of instantaneous power orthogonal components balance have been used to analyze power processes in electric circuits with semiconductor elements. Automated method of forming instantaneous power harmonic components was used to obtain analytical expressions and numerical values of instantaneous power components of analysed electric circuits. A coefficient for estimation of a semiconductor converter nonlinearity degree has been offered.

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Why is it important?

It is shown that the balance of the instantaneous power components for the circuit with a semiconductor element is coincides only if its components are taken into account, even if this element is represented as an ideal one. When nonlinear element apparent power components are taken into consideration, balance on active and reactive powers coincides. Balance on the values of apparent power and distortion power, as well as root-mean-square values of instantaneous power components, coincides on quadratic values. The degree of semiconductor converter nonlinearity can be estimated as the relation of active component of load fundamental harmonic power to active power of the same harmonic of power supply.

Perspectives

In future researches it is planned to improve the non-active current components compensation method by determination of the voltage harmonics caused by distortion of the mains supply and the its future exclude, with the use of the proposed analysis of active power components.

Mrs Mariia Maliakova

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This page is a summary of: Analysis of instantaneous power components of electric circuit with a semiconductor element, Archives of Electrical Engineering, September 2013, De Gruyter,
DOI: 10.2478/aee-2013-0038.
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