Scientific and Technical Journal

Russian Electromechanics


Russian Electromechanics. 2014; 6: 72-77

 

http://dx.doi.org/10.17213/0136-3360-2014-6-72-77

 

Definition of the aperiodic component of mains frequency electric signal with amplitude modulation

V.A. Mamaev, S.S. Yastrebov, N.N. Kononova, P.A. Zvada

V.A. Mamaev, Department «Automated Electrical Power Systems and Power Supply», Federal State Autonomous Educational Institution for Higher Professional Education «North-Caucasus Federal University», Russian Federation, 355009, Stavropol, St. Pushkina, 1. E-mail: mva40@list.ru

S.S. Yastrebov, Department «Automated Electrical Power Systems and Power Supply», Federal State Autonomous Educational Institution for Higher Professional Education «North-Caucasus Federal University», Russian Federation, 355009, Stavropol, St. Pushkina, 1. E-mail: yass@ncstu.ru

N.N. Kononova, Department «Automated Electrical Power Systems and Power Supply», Federal State Autonomous Educational Institution for Higher Professional Education «North-Caucasus Federal University», Russian Federation, 355009, Stavropol, St. Pushkina, 1. E-mail: andrey@kononov.org

P.A. Zvada, Department «Automated Electrical Power Systems and Power Supply», Federal State Autonomous Educational Institution for Higher Professional Education «North-Caucasus Federal University», Russian Federation, 355009, Stavropol, St. Pushkina, 1. E-mail: zpass1781@mail.ru

 

Abstract

The article considers theoretical theses that permit to detect the presence of an aperiodic component and its waveform based on magnitude modulation of the electric signal of transient process. Problem is solved on the basis of the folloeing mathematical operations: multiplication of initial electric signal and supplementary auxiliary unit harmonic signal with frequency much more, then one of the main harmonic of initial electric signal. At the result we have an auxiliary signal, then by selective separation on frequency of  supplementary  auxiliary unit harmonic signal we receive damped harmonic signal. The envelope curve of this signal repeat waveform of the aperiodic component of the electric signal of transient process.

 

Keywords: electric signal, transient process, envelope curve, aperiodic component, signal multiplication, selective separation, modeling.

 

Full text: [in elibrary.ru]

 

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