Power Balance and Power Factors of Distorted Electrical Systems and Variable Speed Asynchronous Electric Drives

Petrushyn, Viktor; Horoshko, Vasiliy; Plotkin, Juriy; Almuratova, Nurgul; Toigozhinova, Zhanar

doi:10.3390/electronics10141676

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Power Balance and Power Factors of Distorted Electrical Systems and Variable Speed Asynchronous Electric Drives

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Electrical Machines Department, Odessa National Polytechnic University, 65044 Odessa, Ukraine

Department of Cooperative Studies, Berlin School of Economics and Law, 10315 Berlin, Germany

Electrical Machines and Electric Drive Department, Almaty University of Power Engineering and Telecommunications, Almaty 050013, Kazakhstan

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Telecommunications and Innovative Technologies Department, Almaty University of Power Engineering and Telecommunications, Almaty 050013, Kazakhstan

Author to whom correspondence should be addressed.

Academic Editor: Enrique Romero-Cadaval

Electronics 2021, 10(14), 1676; https://doi.org/10.3390/electronics10141676

Received: 23 May 2021 / Revised: 29 June 2021 / Accepted: 11 July 2021 / Published: 14 July 2021

(This article belongs to the Section Power Electronics)

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Abstract

In this study, power quality coefficients that determine the distortion of electrical systems are established. The power factor is chosen as a universal criterion for electromagnetic and electro-energetic compatibility of distorted sources and distorting loads. Mathematical expressions are obtained for its calculation in various cases of electrical systems distortion. As an application example, power balances and power factors of a variable frequency asynchronous drive system are considered. The criterion: the power factor not only determines the energy and electromagnetic compatibility of the drive with power supply, but it also evaluates drive efficiency. Experimental studies were carried out under usage of inexpensive, commonly used measuring devices both on the grid side of the frequency converter and on the asynchronous motor side. The studied coefficients were determined in two ways: measuring instruments and analysis of oscillograms. The second method for determining the above coefficients from oscillograms of currents and voltages also requires finding the total harmonic distortion (THD) of currents and voltages for the corresponding load adjusting points. The similarity of the obtained results shows that both of these methods can be applied. According to the operating mode of the load, the criterion is calculated as an average range in a certain range of speed control, or it is determined by considering a given tachogram of speed changes. The results of experimental studies confirm the correctness of the theoretical provisions. View Full-Text

Keywords: distorted electrical system; power quality indicators; power factor; electromagnetic compatibility; energy compatibility; variable speed asynchronous electric drive; efficiency criterion; phase shift factor; non-sinusoidal distortion factor; harmonic distortion factor; asynchronous motor; experimental studies

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MDPI and ACS Style

Petrushyn, V.; Horoshko, V.; Plotkin, J.; Almuratova, N.; Toigozhinova, Z. Power Balance and Power Factors of Distorted Electrical Systems and Variable Speed Asynchronous Electric Drives. Electronics 2021, 10, 1676. https://doi.org/10.3390/electronics10141676

AMA Style

Petrushyn V, Horoshko V, Plotkin J, Almuratova N, Toigozhinova Z. Power Balance and Power Factors of Distorted Electrical Systems and Variable Speed Asynchronous Electric Drives. Electronics. 2021; 10(14):1676. https://doi.org/10.3390/electronics10141676

Chicago/Turabian Style

Petrushyn, Viktor, Vasiliy Horoshko, Juriy Plotkin, Nurgul Almuratova, and Zhanar Toigozhinova. 2021. "Power Balance and Power Factors of Distorted Electrical Systems and Variable Speed Asynchronous Electric Drives" Electronics 10, no. 14: 1676. https://doi.org/10.3390/electronics10141676

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Author Biographies

Viktor Petrushyn

Viktor Petrushin received his diploma degree in “electric machines and apparatuses” at Odessa National Polytechnic University in 1968 and his Ph.D. in 1979. Since 1987, he has worked as an assistant professor at the Department of Electrical Machines, Odessa Polytechnic Institute. From 1993 to 1998, he was dean of the faculty of electrification and automation industry. In 2002, he habilitated and has worked since then as a professor of electrical machines at Odessa National Polytechnic University.

Juriy Plotkin

Juriy Plotkin received his Diploma degree in "electrical engineering/heavy current engineering" at the University of Technology Berlin in 2002 and his Ph.D. in 2009, both with honors. His industrial background is based on work at Alstom Power Conversion in Berlin as a project engineer for rolling mill automation. From 2010 to 2012, he worked as a professor of renewable energy sources at Hamburg University of Applied Sciences. Since 2012, he has been a professor of electrical engineering/energy technology at Berlin School of Economics and Law. His research interests include power electronics, electrical drives and machines, and renewable energy sources.

Nurgul Almuratova

Almuratova Nurgul received her Diploma degree in "electric drive and automation of technological complexes" at the Almaty Institute of Power Engineering and Communications in 2001. She then received her M.S. in electrical engineering in 2012 and Ph.D. degree in power engineering in 2017 from Almaty University of Energy and Communications. Her current research interest lies in the field of electric drive systems’ energy efficiency improvement.

Zhanar Toigozhinova

In 2005, Zhanar Toigozhinova graduated from the Almaty Institute of Power Engineering and Communications with a degree in “electric drive and automation of technological complexes”. In 2014, she completed her master's thesis in the specialty "electricity", master of technical sciences. Her main research interest is the field of multi-motor energy-saving electric drives.

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Power Balance and Power Factors of Distorted Electrical Systems and Variable Speed Asynchronous Electric Drives

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