Effect of ageing in transformer oil using UV-visible spectrophotometeric technique

Abstract

In power systems, varieties of insulation materials are used to protect the high voltage power apparatus such as transformer, switchgear, current transformer, potential transformer etc.

Transformer oil diagnostic by using an optical fibre system: a review

“…In literature, different techniques, such as MZI [12], UV-visible spectrophotometric [64], FBG [13], NIR method [14] or SPR [65] have been used to measure the ageing effect in transformer oil using optical fibre sensor. However, sensing properties of these devices can be enhanced by utilising thin film coatings combined with optical fibre devices as in [66].…”

“…Set-up of optical fibre temperature and refractive index sensor[53] Experimental setup used to detect the ageing of the transformer's insulation oil[64] Polymer optical fibre moisture sensor(a) Sensor not in operation, (b) Sensor in operation -scattering light [72] IET Sci. Meas.…”

Analysis of transformer oil degradation due to thermal stress using optical spectroscopic techniques

“…The ratio, I/I o, is generally defined as transmittance. As per Beer‐Lambert law, the absorbance of light by the sample is deduced from the transmittance, as given in Equation , which is also proportional to the path length, concentration, and absorptivity of the given sample as follows: where A refers to absorbance, T refers to transmittance, ϵ refers to molar absorptivity, c refers to the concentration of the sample, and l refers to the length of the light path, which is equal to the width of the cuvette. The same absorbance, A , is recorded on the detector after the transmitted light passed through the mirror and rotating disc comparing with the reference.…”

“…The ratio, I/I o, is generally defined as transmittance. As per Beer-Lambert law, the absorbance of light by the sample is deduced from the transmittance, as given in Equation 1, which is also proportional to the path length, concentration, and absorptivity of the given sample as follows: 15,16 A…”

Transformer Oil Ageing Detection using Mach–Zender Interferometry Configuration as a Sensor

“…In recent years, optical fibre sensors have been widely utilised in various fields, including environmental, chemical, biological and food industries, because of their unique properties, such as immunity to electromagnetic interference, good sensitivity, light weight and compact size. The quality of oils has been measured by different authors on the basis of different techniques, such as fibre Bragg gratings (FBG) [7], UV-visible spectrophotometry [8], Mach-Zender interferometry (MZI) [9], surface plasmon resonance [10] and NIR method [11] [12].…”