Journal of Modeling and Simulation in Electrical and Electronics Engineering

Journal of Modeling and Simulation in Electrical and Electronics Engineering

UHF Detection of Partial Discharge in High-Voltage Air Insulated Switchgear Using Improved Vivaldi Antenna

Document Type : Research Article

Authors
Mohammad-Reza Nickpay 1
Mohammad Danaie 2
Roohallah Amirabadi 1
Vahid Yari 1
Karim Goudarzikia 1
1 Tehran Regional Electric Company, Tehran, Iran.
2 Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran.
10.22075/mseee.2025.35958.1189
Abstract
Partial discharge (PD) is a major concern in high-voltage electrical equipment, and its detection is crucial for ensuring the reliability and safety of power systems. In high voltage (HV) air-insulated switchgear (AIS), which is commonly used in the transmission and distribution of electrical power, PD can occur due to various factors such as insulation defects, voids, or impurities. Detecting PD at an early stage is essential to prevent equipment failure and costly downtime. Ultra-high frequency (UHF) detection methods are widely used for PD detection in HV AIS, as they offer high sensitivity and the capability to detect PD signals over long distances. In this paper, we will discuss using Vivaldi directional antennas for PD detection in HV AIS, focusing on their advantages, challenges, and potential applications. The simulation was carried out using CST Microwave Studio, and the result revealed that the antenna has a wide impedance bandwidth of 100% in the range of 0.5 to 1.5 GHz with S11 ˂ -10. An average gain of 5 dB and a maximum gain of 8.62 dB are achieved at the operational frequency band.
Keywords
Partial discharge (PD)
UHF
Vivaldi antenna
Air Insulated Switchgear (AIS)
Subjects
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Journal of Modeling and Simulation in Electrical and Electronics Engineering
Volume 5, Issue 2 - Serial Number 20
September 2025
Pages 11-17

  • Receive Date 17 November 2024
  • Revise Date 20 February 2025
  • Accept Date 24 September 2025