GIS partial discharge quantitative measurements using UHF microstrip antenna sensors

Tang, Ju; Zhong-rong, XU; Zhang, Xiaoxing; Sun, Caixin

doi:10.1109/ceidp.2007.4451454

Cited by 26 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An external UHF antenna sensor is simultaneously adopted to verify the superiority of the built-in antenna sensor for PD detection. The external UHF antenna sensor is a single-band microstrip patch antenna [ 21 ] (center frequency: 390 MHz, frequency band: 350–450 MHz), which is placed at the door gap of the switchgear. In order to collect PD signals better and avoid the influence of the sensor position on experimental results, the external UHF antenna sensor remains stationary and as close to the insulation defects as possible.…”

Section: Measurement and Analysis Of Pdmentioning

confidence: 99%

Design of a New Built-in UHF Multi-Frequency Antenna Sensor for Partial Discharge Detection in High-Voltage Switchgears

Zhang

Zheng

Gui

2016

Sensors

View full text Add to dashboard Cite

In this study a new built-in ultrahigh frequency (UHF) antenna sensor was designed and applied in a high-voltage switchgear for partial discharge (PD) detection. The casing of the switchgear was initially used as the ground plane of the antenna sensor, which integrated the sensor into the high-voltage switchgear. The Koch snowflake patch was adopted as the radiation patch of the antenna to overcome the disadvantages of common microstrip antennas, and the feed position and the dielectric layer thickness were simulated in detail. Simulation results show that the antenna sensor possessed four resonant points with good impedance matching from 300 MHz to 1000 MHz, and it also presented good multi-frequency performance in the entire working frequency band. PD detection experiments were conducted in the high-voltage switchgear, and the fabricated antenna sensor was effectively built into the high-voltage switchgear. In order to reflect the advantages of the built-in antenna sensor, another external UHF antenna sensor was used as a comparison to simultaneously detect PD. Experimental results demonstrated that the built-in antenna sensor possessed high detection sensitivity and strong anti-interference capacity, which ensured the practicability of the design. In addition, it had more high-voltage switchgear PD detection advantages than the external sensor.

show abstract

Section: Measurement and Analysis Of Pdmentioning

confidence: 99%

Design of a New Built-in UHF Multi-Frequency Antenna Sensor for Partial Discharge Detection in High-Voltage Switchgears

Zhang

Zheng

Gui

2016

Sensors

View full text Add to dashboard Cite

show abstract

“…One of the electrical methods that has been the focus of research interest is the UHF method, which is based on the measurement of electromagnetic waves generated by PD and propagating in the surrounding medium. A substantial amount of work has been published on this method, mainly with respect to PD detection in gas-insulation systems (GIS) [2][3][4][5][6][7][8][9]. Researchers have used a variety of sensors, in the form of discs [6] or broadband antennas to measure the PD-emitted signals [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Partial Discharge Induced EM Waves Using FDTD Method—A Parametric Study

et al. 2019

View full text Add to dashboard Cite

This paper reports the results of a parametric study on the characteristics of electromagnetic (EM) waves propagated due to surface-and cavity-type partial discharges (PD) in materials using the finite-difference time domain (FDTD) method. First, the EM waves emitted by such discharges in material samples were measured using a broadband aperture antenna. The measurements showed that the frequency range of the measured signals lay within the ultra-high frequency (UHF) range, suggesting that by carefully choosing the UHF antenna characteristics and its location it might be possible to apply this method to characterize the PD-emitted waves; and hence, to potentially use it to detect and monitor PD defects. In this context, the FDTD simulations were used here to simulate the experimental set-up and examine the propagation characteristics of EM waves emitted by such discharges under uniform and non-uniform test electrode configurations. Using an approximation of the exciting PD current pulses, the electromagnetic field components and the voltage signals captured on a simulated monopole sensor were computed in the time domain at various locations. To explore the limits of the application of the UHF method for detecting these PD types, a parametric study was carried out to clarify how the captured signals are influenced by the PD intensity, the frequency content of the exciting PD pulse, the type of insulation material, the dimensions and the position of the UHF antenna. One of the challenges that needs further investigation is the accurate simulation of the actual PD current pulse produced by such discharges, and hence its frequency content, as there is limited or no measured data available. The results showed that while the amplitude of the captured EM signals increase with the PD intensity, no appreciable signal is detected when the PD pulse width is higher than about 4ns, which may not occur often in unbounded air insulated systems. Equally important is the location and orientation of the UHF sensor-the results showed improved sensitivity when the sensor is vertically polarized and placed in close proximity in the lateral direction with reference to the discharge path. (c) 95 Figure 2. Examples of surface discharge signals measured using the ultra-high frequency (UHF) sensor: (a) 96 time domain signals (b) noise level and (c) frequency spectra. 97The frequency spectrum of the noise level ( Figure 2b) and that of the measured signals shown in Figure 98 2c confirm the frequency range of the EM signals emitted by the surface discharge. Peaks detected at 0.9 99 GHz, 1.85 GHz and 2.5 GHz are superimposed GSM and long-term evolution (LTE) signals. The results 100show that the UHF detection can be improved by placing the sensor closer to the discharge source in a 101 horizontal direction. Signals produced by a cavity discharge were measured by using a specially made 102 XLPE block samples with a needle-plane electrode system and were also found to be within the UHF band. 103 3. Surface Discharge Simulation using the FDTD...

show abstract

“…Due to the strong insulation strength and electronegativity of SF 6 gas, it has been widely used as filling gas in insulated equipment, such as SF 6 -insulated high-voltage switchgear (GIS), SF 6 -insulated transmission lines (GIL), and SF 6 -insulated circuit breakers (GCB) [1,2,3]. However, insulation defects inevitably occur in SF 6 -insulated equipment, which induces SF 6 to decompose into various decomposition components: SO 2 , H 2 S, SOF 2 , and SO 2 F 2 under electric discharge [4,5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Ni-CNT Chemical Sensor for SF6 Decomposition Components Detection: A Combined Experimental and Theoretical Study

Tao

Zhang

et al. 2018

Sensors

View full text Add to dashboard Cite

SF6 decomposition components detection is a key technology to evaluate and diagnose the insulation status of SF6-insulated equipment online, especially when insulation defects-induced discharge occurs in equipment. In order to detect the type and concentration of SF6 decomposition components, a Ni-modified carbon nanotube (Ni-CNT) gas sensor has been prepared to analyze its gas sensitivity and selectivity to SF6 decomposition components based on an experimental and density functional theory (DFT) theoretical study. Experimental results show that a Ni-CNT gas sensor presents an outstanding gas sensing property according to the significant change of conductivity during the gas molecule adsorption. The conductivity increases in the following order: H2S > SOF2 > SO2 > SO2F2. The limit of detection of the Ni-CNT gas sensor reaches 1 ppm. In addition, the excellent recovery property of the Ni-CNT gas sensor makes it easy to be widely used. A DFT theoretical study was applied to analyze the influence mechanism of Ni modification on SF6 decomposition components detection. In summary, the Ni-CNT gas sensor prepared in this study can be an effective way to evaluate and diagnose the insulation status of SF6-insulated equipment online.

show abstract

GIS partial discharge quantitative measurements using UHF microstrip antenna sensors

Cited by 26 publications

References 12 publications

Design of a New Built-in UHF Multi-Frequency Antenna Sensor for Partial Discharge Detection in High-Voltage Switchgears

Design of a New Built-in UHF Multi-Frequency Antenna Sensor for Partial Discharge Detection in High-Voltage Switchgears

Simulation of Partial Discharge Induced EM Waves Using FDTD Method—A Parametric Study

Ni-CNT Chemical Sensor for SF6 Decomposition Components Detection: A Combined Experimental and Theoretical Study

Contact Info

Product

Resources

About