Quantification of corona discharges on nonceramic insulators

Pinnangudi, B.; Gorur, R.S.; Kroese, A.

doi:10.1109/tdei.2005.1453456

Cited by 65 publications

(26 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in practical applications, this parameter still has some deficiencies because of its complex relations with observation angle, imager gain, observation distance, and imager types. To overcome these problem, several scholars have attempted to quantify discharges by UV image processing [18][19][20]. However, more unified conclusions are required.…”

Section: Experimental Setup and Uv Imagersmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Different Factors on Electrical Equipment UV Corona Discharge Detection

Jiang

et al. 2016

Energies

View full text Add to dashboard Cite

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.

show abstract

Section: Experimental Setup and Uv Imagersmentioning

confidence: 99%

“…That is to say the effect of sunlight can be excluded during corona and arc discharge detection by UV imaging. Given its advantages, UV imaging has been widely applied and studied worldwide [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Factors on Electrical Equipment UV Corona Discharge Detection

Jiang

et al. 2016

Energies

View full text Add to dashboard Cite

show abstract

“…The rate of decrease in discharge parameters magnitudes is very small compared to that rate of humidity increase. This could be attributed to the scattering and absorption of UV under humid conditions leading to a reduced percentage of UV reaches surface [17].…”

Section: Humiditymentioning

confidence: 99%

Factors of influence on surface erosion of epoxy resin exposed to electrical discharges

Refaey¹,

Kindersberger²

2014

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

This paper investigates the influence of electrical as well as environmental stresses on surface erosion of polymeric materials used in high voltage insulation. The analyzed electrical stresses are applied voltage magnitude and frequency; whereas the environmental stresses of concern are temperature and humidity of air above sample surface. Suitable electrode arrangement is chosen in order to produce measurable erosion and guarantee the control of the analyzed stressing factors. Discharge intensity is defined by two parameters; total discharge energy and cumulative charge; whereas surface erosion severity is characterized by three quantities; surface eroded area, eroded volume and maximum erosion depth. Surface characteristics are obtained by a laser profilometer. From the obtained results a dependence of erosion severity on these stressing factors can be proven. A strong correlation between discharge intensity and material surface erosion is concluded.

show abstract

“…For instance, anomalous electrical phenomena such as corona discharges can induce an excessive increase in temperature leading to thermal degradation of the surrounding materials. The same electrical activity can also cause a highly corrosive production of ozone [18][19][20][21]. These different interacting mechanisms tend to complicate the determination of the exact composite insulator failure mechanisms.…”

Section: Manuscript Received On 15 July 2008 In Final Formmentioning

confidence: 99%

Effects of electric partial discharges on the rheological and chemical properties of polymers used in HV composite insulators after railway service

Habas

Arrouy

Perrot³

2009

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

The origin and the consequences of the electric failure of in-service composite hollow insulators used in railway transportation were investigated. Direct electrical measurements made it possible the detection of partial discharges (PD) and UV emissions allowed of identifying the location of the PD at the interface between metal braids and a silicone liner. To investigate the effects of the damaging PD activity, physicochemical properties of the different polymers were investigated and compared to new samples. The thermomechanical properties of the HTV and RTV silicones showed important alterations in the polymers structure. The chemical analyses of the silicones and nitrile rubber conducted using ATR-FTIR spectroscopy revealed that the polymers were oxidized after electrical failure. The results indicated that the ozone production and UV emission were due to the surface electrical activities. The breakdown of alumina trihydrate (ATH) in the inner HTV silicone liner demonstrated that undesired electrical discharges induced an significant increase of temperature and the formation of moisture in the air present in the hollow insulator. Laboratory artificial aging performed on the silicones and nitrile rubber showed similar degradation as in service. Further electrical experiments conducted on empty hollow insulators enabled the detection of internal PD located in micro-voids present in the adhesive used to bond the HTV silicone liner to the inner composite tube.

show abstract

Quantification of corona discharges on nonceramic insulators

Cited by 65 publications

References 16 publications

Effects of Different Factors on Electrical Equipment UV Corona Discharge Detection

Effects of Different Factors on Electrical Equipment UV Corona Discharge Detection

Factors of influence on surface erosion of epoxy resin exposed to electrical discharges

Effects of electric partial discharges on the rheological and chemical properties of polymers used in HV composite insulators after railway service

Contact Info

Product

Resources

About