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  1. Inception phase angle and shape of partial discharge signals detected by nearfield UHF sensors
Inception phase angle and shape of partial discharge signals detected by nearfield UHF sensors
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Inception phase angle and shape of partial discharge signals detected by nearfield UHF sensors

Ansari Vasigh Zadeh, A

Inception phase angle and shape of partial discharge signals detected by nearfield UHF sensors

Ansari Vasigh Zadeh, A ; Sharif University of Technology | 2024

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  1. Type of Document: Article
  2. DOI: 10.1109/TDEI.2024.3486272
  3. Publisher: IEEE , 2024
  4. Abstract:
  5. When using an antenna near a high voltage conductor for the Partial Discharge (PD) detection application, curiosity for understanding any share of capacitive coupling in this process will arise. In usual applications of the Ultra-High Frequency (UHF) sensors, the antenna's plates are not near a high voltage conductor so it is inferred undoubtedly that every signal received by the sensor is just the result of electromagnetic radiation from a source. However, when the antenna is settled close to a high voltage conductor, although the capacitances are negligible, the voltage involved in this process is high enough to induce significant capacitive voltage on the antenna's plates. So the UHF sensor would not be a pure antenna that only receives some electromagnetic waves, because it is intentionally located near high voltage equipment and consequently its capacitive features play role in receiving the induced voltage. In this paper, these in-circuit effects are investigated in time domain and in form of Phase Resolved Partial Discharge (PRPD) patterns. Additionally, some methods for compensation of adverse capacitive features of the antenna are presented. Also in this research, wave propagation features of Partial Discharge signals emitted to the surrounding space are studied. It is shown that the shape of PD signals received by the antenna, in form of a damped exponential signal, is due to the reflection of electromagnetic waves from the surface of antenna and the nearby conductors. This might provide a new approach for future work on PD signals through non-conventional UHF method. © 2024 IEEE
  6. Keywords:
  7. Capacitive division ; PD calibration ; PD reflection ; Phase correction ; PRPD correction ; UHF antenna ; Directional patterns (antenna) ; Electromagnetic wave emission ; Electromagnetic wave propagation ; Electromagnetic wave reflection
  8. Source: IEEE Transactions on Dielectrics and Electrical Insulation ; 32, Issue 3 , 2024 , pp. 1403-1412, 10 pp ; 10709878 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/10734351