FLUORESCENT PROPERTIES OF PAPER INSULATION OF OIL-FILLED TRANSFORMERS

Abstract

The effect of paper thermal destruction on its luminescence spectra and luminescence excitation spectra in the spectral ranges of 400-550 nm and 250-450 nm, respectively, was studied. It is proposed to use the characteristic changes in the intensity and shape of the luminescence spectra as a criterion for the state of paper insulation of power transformers. On the basis of the analysis performed, it was concluded that when luminescence is excited at a wavelength of 360 nm, none of the main components of the paper can contribute to the recorded luminescence spectra. It is assumed that the resulting luminescence spectra are due to the emission of various impurities that enter the paper during its production.

Keywords

• optical spectroscopy
• luminescence spectra
• luminescence excitation spectra
• absorption spectra
• paper
• the degree of polymerization of paper
• thermal destruction
• cellulose
• lignin
• humic substances
• dissolved organic substances