Parameters of excitation and photoluminescence of pure and spent transformer oil

Optical methods of transformer oil diagnostics are a promising direction of digitalization of energy. The purpose of this work is a comparative analysis of the luminescent parameters of pure and spent transformer oil, which is necessary to create a technique for its optical diagnostics. A diffraction spectrofluorimeter was used for spectral measurements. The energy (absorption capacity and flux) and statistical (expectation, variance, statistical moments, asymmetry, kurtosis) parameters of photoluminescence are calculated. The mathematical expectations of the long-wave spectrum of pure and short-wave spectrum of used oil differ by 27nm, which can be used in the design of a quality control device. The photoluminescence flux is the most informative and relatively easy to measure for monitoring the degree of transformer oil working out. It is advisable to carry out luminescent diagnostics of oil in the excitation range of 340-400nm at a maximum of about 376nm with measurement of the photoluminescence flux in the range of 400-500nm.