Monitoring particle concentrations produced by arcing in SF6 circuit breakers using a chromatic modulation probe

Isaac, L; Jones, G.R.; Humphries, J. E.; Spencer, J. W.; Hall, W. B.

doi:10.1049/ip-smt:19990224

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…Thus an appropriate choice of chromatic weighting would appear to offer a range of sensing capabilities. The use of chromatic processing for the monitoring of particulates via the wavelength dependency of Mie scattered light has been demonstrated for high voltage circuit breaker applications by Isaac et al [18]. The technique has been extended for monitoring particulates in the exhaust of a diesel car engine (R Haber, private communication).…”

Section: Representation Of Information By a Chromatic Pointmentioning

confidence: 99%

“…In these cases the sensor modulating factor where the phase difference between the interfering light beams δ = (π n∇x)/λ ( is related to the measurand, the film thickness (∇x)/2, the refractive index n of the film material and the wavelength of the light. Such measurements are important in monitoring the etching of thin films in the semiconductor industry [18], wherein the temporal variation of the film thickness is monitored on line. Thus, by representing the film thickness on an x, y map (equation ( 13)), the time varying thickness appears as the locus of a changing chromatic point.…”

Section: Resolution Signal Ambiguity and A Time Tracking Examplementioning

confidence: 99%

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The Gabor transform basis of chromatic monitoring

Jones

Russell

Vourdas

et al. 2000

Meas. Sci. Technol.

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Chromaticity based monitoring methodologies have evolved from polychromatic optical fibre based sensing systems, which was first implemented during the 1980s. The evolution has led to a recognition that such a methodology is applicable to monitoring systems more widely. It is shown that the method may be regarded as the manifestation of a particular form of signal representation by Gabor transforms. Examples of generically different practical implementations of the chromatic methodology to a range of different monitoring situations are given.

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Section: Representation Of Information By a Chromatic Pointmentioning

confidence: 99%

Section: Resolution Signal Ambiguity and A Time Tracking Examplementioning

confidence: 99%

The Gabor transform basis of chromatic monitoring

Jones

Russell

Vourdas

et al. 2000

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Therefore, a chromatic method was selected for addressing the complex spectra. This method is a hierarchical approach used for dimensionality reduction, feature detection and cluster analysis, which is suitable for online condition monitoring [10,11,12]. It does not require complicated calculation.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic On-Line Monitoring of Cu/W Contacts Erosion in HVCBs Using Optical-Fibre Based Sensor and Chromatic Methodology

Wang

Jones

Spencer

et al. 2017

Sensors

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Contact erosion is one of the most crucial factors affecting the electrical service lifetime of high-voltage circuit breakers (HVCBs). On-line monitoring the contacts’ erosion degree is increasingly in demand for the sake of condition based maintenance to guarantee the functional operation of HVCBs. A spectroscopic monitoring system has been designed based upon a commercial 245 kV/40 kA SF6 live tank circuit breaker with copper–tungsten (28 wt % and 72 wt %) arcing contacts at atmospheric SF6 pressure. Three optical-fibre based sensors are used to capture the time-resolved spectra of arcs. A novel approach using chromatic methods to process the time-resolved spectral signal has been proposed. The processed chromatic parameters have been interpreted to show that the time variation of spectral emission from the contact material and quenching gas are closely correlated to the mass loss and surface degradation of the plug arcing contact. The feasibility of applying this method to online monitoring of contact erosion is indicated.

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“…The second is the dynamic pressure measurement in the cylinder and nozzle, including both no load and high current break [5,6] . The third is the arc radiation and particle concentration measurement which reflect the evaporation of contact material and its impact on the arcing chamber [7] .…”

Section: Introductionmentioning

confidence: 99%

Pressure and Arc Voltage Measurement in a 252 kV SF₆Puffer Circuit Breaker

Zhang¹,

Yujing²,

Zhang³

2016

Plasma Sci. Technol.

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The pressure distribution in an arcing chamber is critically important for the SF6 puffer circuit breaker design. In this paper, the pressure variation of four locations in the nozzle was measured by piezoresistive and fiber optical pressure sensors at two current levels of 10 kA and 50 kA. An arc voltage measurement was also taken. The results demonstrate that using either type of sensor with a connecting tube is able to detect the fast pressure variation in circuit breakers, however the possible distortion and delay to the pressure transient caused by the tube need further study.

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Monitoring particle concentrations produced by arcing in SF6 circuit breakers using a chromatic modulation probe

Cited by 6 publications

References 4 publications

The Gabor transform basis of chromatic monitoring

The Gabor transform basis of chromatic monitoring

Spectroscopic On-Line Monitoring of Cu/W Contacts Erosion in HVCBs Using Optical-Fibre Based Sensor and Chromatic Methodology

Pressure and Arc Voltage Measurement in a 252 kV SF₆Puffer Circuit Breaker

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Monitoring particle concentrations produced by arcing in SF6 circuit breakers using a chromatic modulation probe

Cited by 6 publications

References 4 publications

The Gabor transform basis of chromatic monitoring

The Gabor transform basis of chromatic monitoring

Spectroscopic On-Line Monitoring of Cu/W Contacts Erosion in HVCBs Using Optical-Fibre Based Sensor and Chromatic Methodology

Pressure and Arc Voltage Measurement in a 252 kV SF6Puffer Circuit Breaker

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Product

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Pressure and Arc Voltage Measurement in a 252 kV SF₆Puffer Circuit Breaker