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The National Academy of Sciences of Ukraine

The Institute of Electrodynamics

About Institute



V.V. Kuchanskyi
Institute of Electrodynamics of the National Academy of Sciences of Ukraine,
Peremohy, 56, Kyiv-57, 03680, Ukraine,
е-mail:  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

The paper deals with the analysis and classification of durable internal overvoltages in the main power electrical network. The work considers the possibility of developing overvoltages in abnormal modes with sources characterized by distortions: asymmetric, nonsinusoidal and combined. Investigated those abnormal resonance overvoltages which occur in the extra high voltage transmission lines 750 kV with nonsinusoidal and asymmetric sources of distortion depend of many interconnected processes and on the values of a large number of parameters. Such an overvoltage classification is not accidental, since the source of their occurrence and distortion characteristics determine an abnormal regime. Described an example of such distortion, is incomplete mode of operation of the extra-high voltage transmission line, which causes the appearance of resonance circuits with distributed capacities of the line and the inductances of the shunt reactors. Detected that the second type of abnormal resonance overvoltages occur when extra high voltage transmission line switching on to no-loaded autotransformer. The theoretical principles of the emergence of harmonic resonant overvoltages with the inclusion of the superconducting voltage on the unloaded autotransformer are given. The key factor which led to abnormal nonsinusoidal mode is saturation magnetical core of noloaded autotransformer is analyzed. The main approaches to the study of abnormal resonance overvoltages are described and directions of the subsequent researches are designated. The obtained results of the research indicate the expediency of studying the conditions of occurrence and existence of abnormal resonance overvoltages. References 15, figures 5, table 1.
Key words: extra-high voltage power lines, abnormal resonant overvoltages, asymmetric mode, single-phase automatic re-closer, nonsinusoidal mode, no-loaded mode of autotransformer.

1. GOST 20690-75 (ST SEV 1126-88, ST SEV 5797-86, ST SEV 5800-86, ST SEV 6111-87, ST SEV 6466-88) Electrical equipment of alternating current for voltage 750 kV. Requirements for the electrical strength of insulation (with Changes N 1-6).
2. IEC 60071–2 Insulation coordination.  Part 2: Application guide, 2014.
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11. Kuznetsov V.G., Tugay Y.I., Kuchanskyy V.V. Investigation of transposition EHV transmission lines on abnormal overvoltages. Tekhnichna elektrodynamika. 2013. No 6. P. 53–56. (Ukr)
12. Kuchanskyy V. Criteria of resonance overvoltages occurrence in abnormal conditions of extra high voltage transmission lines. Naukovi pratsi Vinnyts'koho natsional'noho tekhnichnoho universytetu. 2016. No 6. P. 51–54. (Ukr)
13. Kuchanskyy V. The application of controlled switching device for prevention resonance overvoltages in nonsinusoidal modes. Proc. 37th IEEE International Conference on Electronics and Nanotechnology (ELNANO), Kiev, 19-21 April 2017, No 1. P. 394–399. DOI:
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