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Energies 2016, 9(5), 369; doi:10.3390/en9050369

Effects of Different Factors on Electrical Equipment UV Corona Discharge Detection

1
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
2
School of Electric Power, South China University of Technology, Guangdong 5010640, China
*
Author to whom correspondence should be addressed.
Academic Editor: Akhtar Kalam
Received: 9 March 2016 / Revised: 4 May 2016 / Accepted: 9 May 2016 / Published: 16 May 2016
View Full-Text   |   Download PDF [8100 KB, uploaded 16 May 2016]   |  

Abstract

As a non-contact discharge detection method, ultraviolet (UV) imaging can rapidly, directly, and securely detect corona discharges. Therefore, UV imaging has been widely applied to power systems. To study the influences of different factors on UV corona discharge detection, two typical types of UV imagers (DayCor®Superb and CoroCAM®6D) were utilized. Results show that the observation angle has little impact on UV detection if no obstacles block the detection line of sight. Given that different UV imagers have different optimal imager gains, photon numbers under different gains could be calibrated to the values under optimal gains in accordance with the gain correction formula. Photon numbers decrease with the increase in the square of observation distance. Detection results under different observation distances could be corrected to the contrast distance after the detection of electrical equipment. The photon numbers of different UV imager types could be corrected in accordance with the instrumental correction factor. The results of this study can provide references to improve the applications and standardizations of UV imaging technology in corona discharge detection. View Full-Text
Keywords: corona discharge; UV imaging; photon number; observation angle; gain; observation distance; correction corona discharge; UV imaging; photon number; observation angle; gain; observation distance; correction
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

Li, Z.; Li, L.; Jiang, X.; Hu, J.; Zhang, Z.; Zhang, W. Effects of Different Factors on Electrical Equipment UV Corona Discharge Detection. Energies 2016, 9, 369.

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