Measurement of optical signals emitted by surface discharges on bushing and post insulator

Frącz, Paweł

doi:10.1109/tdei.2013.6633724

Cited by 17 publications

(11 citation statements)

References 20 publications

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“…Experiments were carried out on sample A (bushing structure) and sample E (post insulator structure), which have the same length of insulation layer, to compare the flashover characteristics of the bushing and the post insulator [27]. The test ESDD ranged from 0.01 mg/cm 2 to 0.2 mg/cm 2 , corresponding to light to heavy pollution; the results are shown in Figure 5.…”

Section: Effect Of Esddmentioning

confidence: 99%

The Effect of a Vertical Electric Field on the Surface Flashover Characteristics of a Bushing Model

et al. 2018

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High-voltage bushings play a crucial role in energy conveyance. Their specialized electric structure makes the bushing more vulnerable to surface discharge. However, the influence of a vertical electric field on the surface flashover of bushing structures remains unclear. To investigate this mechanism, four simplified bushing samples were built and the influence of pollution, leakage length, and the electric field component vertical to the dielectric surface on flashover properties of the bushing samples were tested. It was found that the surface pollution level was the decisive factor that influenced flashover voltage. When the leakage length and form factor were the same, the pollution flashover of the bushing structure was lower than that of the post structure. It was also found that increasing the leakage length was not very effective in improving the flashover voltage of bushings when the equivalent salt deposit density (ESDD) was high. No obvious correlation was found between pollution flashover voltage and electric field stress. Furthermore, the uneven wetting flashover performance of the bushings was tested. Under this condition, the flashover voltage decreased with an increase of the electric field component vertical to the dielectric surface. In addition, the electric field distribution of the samples was calculated and the results were in accordance with the experimental results.

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Section: Effect Of Esddmentioning

confidence: 99%

The Effect of a Vertical Electric Field on the Surface Flashover Characteristics of a Bushing Model

et al. 2018

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“…Accordingly, the following diagnostic methods for insulating systems have been developed: invasive and non-invasive electrical methods [3][4][5][6][7][8][9][10][11] ; gas chromatography; wideband methods: UHF (ultra high frequency) or VHF (very high frequency) [12][13][14] ; the acoustic emission (AE) method [15][16][17][18][19][20][21][22][23][24][25] ; and optical spectrophotometry [26][27][28][29][30] . The subject area of this paper covers improving the AE method applications.…”

Section: Acoustic Emissionmentioning

confidence: 99%

Application of a mobile system in diagnostics of power capacitors using the acoustic emission method

Błachowicz¹,

Boczar²,

Wotzka³

2016

Insight

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in the fields of informatics, electronics and electrical engineering. He obtained a PhD degree in engineering sciences and electrical engineering in 2014 from Opole University of Technology, Poland. The main objective of the work he has undertaken is diagnostics of the partial discharge (PD) effect occurring in medium voltage power capacitors. The work carried out also covers the modelling process for the phenomenon of acoustic emission generated by PDs. a PhD degree in electrical engineering from the Silesian University of Technology, Institute of Electrical Power Engineering, Gliwice, Poland. At the present time he is engaged in different applications of the acoustic emission method and other non-destructive methods, particularly in diagnostics of the insulation set-ups of electric appliances. In these fields he has published more than 300 journal and conference papers, five monographs and three books. Currently, he is a lecturer and research worker at Application of a mobile system in diagnostics of power capacitors using the acoustic emission method This paper presents the results obtained from measurements and analyses of acoustic emission (AE) signals generated by partial discharges (PD) in a model of power capacitors during experiments carried out under laboratory conditions.A remotely-controlled mobile unit (RCMU) has been used in experimental tests, allowing the safe execution of measurements in hazardous conditions. The measurement set-up and construction of the RCMU is presented. The study confirmed that it is possible to use a remotely-controlled mobile unit for carrying out measurements under high voltage.The most significant contribution of the paper lies in the idea that the PD of a condenser for electric power is detected using a mobile system, which can also be applied for other purposes related to the non-destructive diagnosis of power equipment systems working under difficult operating conditions.

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“…A method for recording optical radiation is the spectrophotometry technique, allowing the recording of not only the radiation intensity but, above all, the occurrence and shape of the spectrum present in the emitted signals [17]. In this technique spectrophotometers are used, which are currently being constructed from sets of photodiodes with variable wavelengths, light-sensitive CCD detectors, and special software for processing [18,19]. An important parameter affecting the accuracy and efficiency of the obtained results of measurements is the amount of attenuation and dispersion of optical signals depending, among other things, on the distance of the recording equipment from the point of PD generation and the propagation medium itself.…”

Section: Metrological Parameters Of the Measuring Systemmentioning

confidence: 99%

Diagnosis of High Voltage Insulators Made of Ceramic Using Spectrophotometry

Frącz

Urbaniec

Turba

et al. 2016

Journal of Spectroscopy

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The paper presents results of comparative analysis of optical signals emitted by partial discharges occurring on three types of high voltage insulators made of porcelain. The research work consisted of diagnosis of the following devices: a long rod insulator, a cap insulator, and an insulating cylinder. For optical signal registration a spectrophotometer was applied. All measurements were performed under laboratory conditions by changing the value of partial discharges generation voltage. For the cylindrical insulator also the distance between high voltage and ground electrodes was subjected for investigation as a factor having influence on partial discharges. The main contribution which resulted from the studies is statement that application of spectrophotometer enables faster recognition of partial discharges, as compared to standard methods.

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Measurement of optical signals emitted by surface discharges on bushing and post insulator

Cited by 17 publications

References 20 publications

The Effect of a Vertical Electric Field on the Surface Flashover Characteristics of a Bushing Model

The Effect of a Vertical Electric Field on the Surface Flashover Characteristics of a Bushing Model

Application of a mobile system in diagnostics of power capacitors using the acoustic emission method

Diagnosis of High Voltage Insulators Made of Ceramic Using Spectrophotometry

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