Abstract
This paper presents a ultra-high frequency (UHF) antenna for partial discharge (PD) detection and the antenna sensor can be used near a conducting ground wire. The proposed UHF antenna has advantages of easy setup and higher-frequency detection over the high-frequency current transformer (HFCT) sensor. First, a variety of loop-shaped antennas are designed to compare each near field coupling capability. Then, a new UHF antenna is designed based on the loop-shaped antenna, which has the best near field coupling capability. Finally, the proposed UHF antenna is fabricated and measured. It provides a wide impedance bandwidth of 760 MHz (740–1500 MHz). Its simple setup configuration and wide bandwidth frequency response in the UHF band can provide a more efficient means for PD detection.
Highlights
With the significant increase in electric power consumption, power equipment is currently being developed towards large capacity, ultra-high voltage, and unmanned control
Among many factors that cause the failure in the power equipment, partial discharge (PD), which is a localized discharge in an electrical dielectric insulation system under high-voltage (HV) field, is the major cause of power equipment failure
We considered various shaped loop antennas, including investigated the ultra-high frequency (UHF) antenna for PD detection from 500 –1500 MHz, various simple loop antennas circle, square, rectangle, rhombic, and elliptical loop antennas [14,15,16,17,18,19]
Summary
With the significant increase in electric power consumption, power equipment is currently being developed towards large capacity, ultra-high voltage, and unmanned control. PD events in HV power equipment typically produce very short current pulses with a rise time of less than 1 nanosecond, which can emit EM waves in the GHz frequency band [5]. A novel UHF antenna is designed to detect the PD in HV power equipment, which is placed nearby thea conducting ground is wire, rathertothan completely the conducting. Inground addition, implemented since it does not need toexceeds be clamped to the conducting ground wire, different from the wire the GHz frequency band that of the theinproposed antenna can detect the the PDdetection signals inrange the conducting ground wire in the GHz. HFCT. The proposed UHF antenna can detect the PD signals in the conducting ground frequency band that exceeds the detection range of the HFCT. Wire in the GHz frequency band that exceeds the detection range of the HFCT
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