Application of the Acoustic Emission Method for Diagnosis of On-Load Tap Changer

Majchrzak, Henryk; Cichoń, A.; Borucki, S.

doi:10.1515/aoa-2017-0004

Cited by 28 publications

(14 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This involves shutting off power supply for the device during connection/disconnection of probes which is a huge disadvantage [3]. Non-invasive methods include: acoustic emission [4,5], optical emission [6,7], electromagnetic or radio-frequency detection [8,9]. This paper concerns the use of invasive, classical method.…”

Section: Metrological Parameters Of the Measuring Systemmentioning

confidence: 99%

Comparative analysis of cellulose pressboard and aramid paper used in air insulation systems of high-voltage devices

Turba

Frącz

2017

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. The paper presents results of a comparative analysis of parameters of two kinds of solid dielectrics used in air insulation systems to prevent occurring partial discharges. The research works regarded materials made of: cellulose pressboard and aramid paper. All measurements were performed under laboratory conditions by changing the value of partial discharges generation voltage until breakdown occurred in the inhomogeneous environment that was simulated using needle-plate (made of copper) electrode system. The main contribution which resulted from studies is a statement that potential use of aramid paper as a dielectric can extend the life of a high voltage electric device as compared to standard cellulose pressboard usage due to higher electric resistances to breakdown or detection of corona voltage. Results shown that the aramid paper has greater electric resistance to breakdown in comparison to cellulose with no difference between both on detecting corona of partial discharge.

show abstract

Section: Metrological Parameters Of the Measuring Systemmentioning

confidence: 99%

Comparative analysis of cellulose pressboard and aramid paper used in air insulation systems of high-voltage devices

Turba

Frącz

2017

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…If interested in other studies regarding generation of noise and vibration caused by electric power devices the reader is referenced to e.g. [20][21].…”

Section: Introductionmentioning

confidence: 99%

Comparison of low frequency signals emitted by wind turbines of two different generator types

et al. 2017

View full text Add to dashboard Cite

Abstract. Paper presents results of comparative analysis of infrasound noise generated by wind turbines of two types: asynchronous type REPOWER MM92 with power equal to 2 MW and synchronous type Vensys 62 with power equal to 1.2 MW. Frequency spectra of sound pressure levels generated during operation by both turbines for exemplary chosen wind speed values are depicted. Within the shown spectra the resonant frequencies have been indicated, for which sound pressure variations over time are shown. Based on the achieved frequency spectra it was stated that in general the asynchronous type turbine produces lower pressure levels, which are less stable over time, and indicates higher pressure values around the resonant frequencies as compared to the synchronous type turbine. Also it was stated that the asynchronous type turbine is more influenced by the wind conditions and generates higher pressure values by higher wind speeds then the synchronous type turbine. The main contribution of this paper lies in indication that the type of wind turbine generator has significant impact on the level of infrasound noise emitted to the environment.

show abstract

“…The most important of these are: ultra-high frequency (UHF) [2,3], acoustic wave generation (AE) [4][5][6][7], optical radiation [8][9][10] and high-energy X-rays [11,12]. Based on these phenomena, measurement methods have been applied, which are used in diagnostics of insulation systems in power transformers [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Mathematical model of optical signals emitted by electrical discharges occuring in electroinsulating oil

Kozioł

2017

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. The article presents a parametric model describing the registered distributions spectrum of optical radiation emitted by electrical discharges generated in the systems: the needle-needle, the needleplate and in the system for surface discharges. Generation of electrical discharges and registration of the emitted radiation was carried out in three different electrical insulating oils: fabric new, operated (used) and operated with air bubbles. For registration of optical spectra in the range of ultraviolet, visible and near infrared a high resolution spectrophotometer was. The proposed mathematical model was developed in a regression procedure using gauss-sigmoid type function. The dependent variable was the intensity of the recorded optical signals. In order to estimate the optimal parameters of the model an evolutionary algorithm was used. The optimization procedure was performed in Matlab environment. For determination of the matching quality of theoretical parameters of the regression function to the empirical data determination coefficient R 2 was applied.

show abstract

Application of the Acoustic Emission Method for Diagnosis of On-Load Tap Changer

Cited by 28 publications

References 14 publications

Comparative analysis of cellulose pressboard and aramid paper used in air insulation systems of high-voltage devices

Comparative analysis of cellulose pressboard and aramid paper used in air insulation systems of high-voltage devices

Comparison of low frequency signals emitted by wind turbines of two different generator types

Mathematical model of optical signals emitted by electrical discharges occuring in electroinsulating oil

Contact Info

Product

Resources

About