Characterizing the sensitivity of UHF partial discharge sensors using FDTD modeling

Asnor Mazuan Bin Ishak, Peter Baker, Wah Hoon Siew, Martin Judd

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Ultra high frequency (UHF) partial discharge sensors are widely used for condition monitoring and defect location in the insulation systems of high voltage equipment. Designing sensors for specific applications often requires an iterative process of manufacture, test, and mechanical modifications. This paper demonstrates the use of finite-difference time-domain (FDTD) simulation as a tool to predict the frequency response of a UHF sensor design. Using this approach, the design process can be simplified and parametric studies can be conducted in order to assess the influence of component dimensions and material properties on the sensor response. The modeling approach is validated using a broadband UHF sensor calibration system, which uses the step response of the sensor to determine its frequency-domain transfer function. The use of a transient excitation source is particularly suitable for modeling using FDTD, which is able to simulate the step response output voltage of the sensor, from which the frequency response is obtained using the same post-processing applied to the physical measurement. Comparisons between simulation and measurement are made for three different sensors, demonstrating sensitivity agreement to within about 10%. Some examples of simple parametric studies carried out using the FDTD model are also presented.
LanguageEnglish
Pages3025-3031
Number of pages8
JournalIEEE Sensors Journal
Volume13
Issue number8
DOIs
Publication statusPublished - Aug 2013

Fingerprint

Partial discharges
ultrahigh frequencies
sensitivity
sensors
Sensors
Step response
frequency response
Frequency response
Condition monitoring
Electric potential
insulation
transfer functions
Transfer functions
Insulation
high voltages
Materials properties
simulation
Calibration
broadband
Defects

Keywords

  • characterizing
  • sensitivity
  • UHF partial discharge sensors
  • FDTD

Cite this

Ishak, Asnor Mazuan Bin ; Baker, Peter ; Siew, Wah Hoon ; Judd, Martin. / Characterizing the sensitivity of UHF partial discharge sensors using FDTD modeling. In: IEEE Sensors Journal. 2013 ; Vol. 13, No. 8. pp. 3025-3031.
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Characterizing the sensitivity of UHF partial discharge sensors using FDTD modeling. / Ishak, Asnor Mazuan Bin; Baker, Peter; Siew, Wah Hoon; Judd, Martin.

In: IEEE Sensors Journal, Vol. 13, No. 8, 08.2013, p. 3025-3031.

Research output: Contribution to journalArticle

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