Study of the magnetic field effect on partial discharges characteristics
The paper is devoted to the study of the dependences of the characteristics of partial discharges on magnetic induction. The design of the experimental setup has been developed. It allows applying both high voltage and current comparable to the operating one. The setup includes a high voltage sou...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education
2024-09-01
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| Series: | Омский научный вестник |
| Subjects: | |
| Online Access: | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2024/%E2%84%963%20(191)%20(%D0%9E%D0%9D%D0%92)/110-116%20%D0%9F%D0%BE%D0%BB%D1%8F%D0%BA%D0%BE%D0%B2%20%D0%94.%20%D0%90.,%20%D0%A5%D0%BE%D0%BB%D0%BC%D0%BE%D0%B2%20%D0%9C.%20%D0%90.,%20%D0%9D%D0%B8%D0%BA%D0%B8%D1%82%D0%B8%D0%BD%20%D0%9A.%20%D0%98..pdf |
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| Summary: | The paper is devoted to the study of the dependences of the characteristics of
partial discharges on magnetic induction. The design of the experimental setup has
been developed. It allows applying both high voltage and current comparable to the
operating one. The setup includes a high voltage source (dielectric tester), a current
flow circuit, a high voltage current transformer and a sample of XLPE insulated
cable. The operation of the electrical circuit of the experimental setup is simulated
using software. The modeling has shown that if the operational electrical strength
of the current transformer insulation is present, the high-voltage potential cannot
contact the current flow circuit. After this, modeling of the magnetic field inside
the insulating layer is carried out. Based on the developed design, an experimental
setup is created. To record partial discharges, an artificial defect is created in a
cable sample. The results of magnetic field modeling made it possible to estimate
the magnetic induction in the field of an artificial cable defect. Next, experimental
studies are carried out to assess the influence of the magnetic field of the cable core
current on the characteristics of partial discharges. The measurement results have
showed a decrease in the average apparent charge of partial discharges and partial
discharge power with increasing current. In addition, waveforms are compared, but
no significant differences are found. The magnetic field of the current may influence
the PD performance in the long term due to its possible influence on the direction
of growth of the electrical tree structure. |
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| ISSN: | 1813-8225 2541-7541 |