The effect of the accuracy of determining the angular ratios of the vectors of a three-phase system on the error of estimating symmetric components
https://doi.org/10.37493/2307-907X.2023.6.2
Abstract
Introduction. Analysis of the quality of electricity based on indicators characterizing voltage asymmetry using the classical method of symmetrical components involves measuring not only an assessment of the voltage modules of a three-phase system, but also their angular ratios.
Goal. Assessment of the influence of the angular error of vector measurements of the parameters of a three-phase system on the accuracy of estimating symmetrical components.
Materials and methods. As part of the research, a statistical testing method was implemented based on a computational experiment.
Results and discussion. An assessment was made of the error in calculating symmetrical components at different levels of asymmetry and different angular errors of vector measurements. The dependences of the error in determining the positive, negative and zero sequence voltages on the accuracy of estimating the angular relationships between the vectors of the measured voltages of a three-phase network were obtained.
Conclusion. As a result, requirements have been formulated for the accuracy of determining the angular relationships of the vectors of a three-phase system, ensuring satisfactory accuracy in the calculation of symmetrical components.
About the Authors
V. E. Martusenko
North-Caucasus Federal University
Russian Federation
Russian Federation
Vitaly E. Martusenko – Senior Lecturer of the Department of Automated Electric Power Systems and Power Supply, Engineering Institute. Researcher ID: ISS-8247-2023.
1, Pushkin St., Stavropol, 355017
Yu. Yu. Dedeshko
North-Caucasus Federal University
Russian Federation
Russian Federation
Yury Yu. Dedeshko – Student of the Department of Automated Electric Power Systems and Power Supply, Engineering Institute. Researcher ID: ISS-8620-2023.
1, Pushkin St., Stavropol, 355017
D. Е. Minaev
North-Caucasus Federal University
Russian Federation
Russian Federation
Dmitry Е. Minaev – Student of the Department of Automated Electric Power Systems and Power Supply, Engineering Institute. Researcher ID: ISS-8708-2023.
1, Pushkin St., Stavropol, 355017
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Review
For citations:
Martusenko V.E., Dedeshko Yu.Yu., Minaev D.Е. The effect of the accuracy of determining the angular ratios of the vectors of a three-phase system on the error of estimating symmetric components. Newsletter of North-Caucasus Federal University. 2023;(6):16-24. (In Russ.) https://doi.org/10.37493/2307-907X.2023.6.2
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