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Sensors 2015, 15(4), 7360-7387; doi:10.3390/s150407360

Application of HFCT and UHF Sensors in On-Line Partial Discharge Measurements for Insulation Diagnosis of High Voltage Equipment

1
Department of Electrical Engineering, Polytechnic University of Madrid, Ronda de Valencia 3, Madrid 28012, Spain
2
LCOE-FFII, Eric Kandel 1, Getafe 28906, Spain
3
DIAEL, Peñuelas 38, Madrid 28005, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M.N. Passaro
Received: 26 January 2015 / Revised: 4 March 2015 / Accepted: 16 March 2015 / Published: 25 March 2015
(This article belongs to the Section Physical Sensors)

Abstract

Partial discharge (PD) measurements provide valuable information for assessing the condition of high voltage (HV) insulation systems, contributing to their quality assurance. Different PD measuring techniques have been developed in the last years specially designed to perform on-line measurements. Non-conventional PD methods operating in high frequency bands are usually used when this type of tests are carried out. In PD measurements the signal acquisition, the subsequent signal processing and the capability to obtain an accurate diagnosis are conditioned by the selection of a suitable detection technique and by the implementation of effective signal processing tools. This paper proposes an optimized electromagnetic detection method based on the combined use of wideband PD sensors for measurements performed in the HF and UHF frequency ranges, together with the implementation of powerful processing tools. The effectiveness of the measuring techniques proposed is demonstrated through an example, where several PD sources are measured simultaneously in a HV installation consisting of a cable system connected by a plug-in terminal to a gas insulated substation (GIS) compartment. View Full-Text
Keywords: partial discharges; HFCT sensors; UHF sensors; wideband PD measurements; insulation condition; on-line PD measurements; noise rejection; pattern recognition partial discharges; HFCT sensors; UHF sensors; wideband PD measurements; insulation condition; on-line PD measurements; noise rejection; pattern recognition
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Álvarez, F.; Garnacho, F.; Ortego, J.; Sánchez-Urán, M.Á. Application of HFCT and UHF Sensors in On-Line Partial Discharge Measurements for Insulation Diagnosis of High Voltage Equipment. Sensors 2015, 15, 7360-7387.

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