Electromagnetic Spectra Generated by Partial Discharges in Natural Ester Doped by Nanoparticles

The article presents studies using an optical spectrophotometer during the recording of partial discharges in natural ester with admixtures of nanoparticles. Optical spectra of ultraviolet, visible and near-infrared light were recorded. The results of electrical strength measurements for admixtures for several weight concentrations are presented. The analysis of spectrum distribution into individual ranges was done and a possible explanation of increase in electrical strength of nanofluids and change of spectral range in relation to pure electroinsulating liquid was proposed. Natural ester Midel 1204 was doped with iron nanopowder in hydrophobic carbon shells. The electrical strength pattern was observed for some combinations and the shift of the optical spectrum from the visible range for the pure liquid to the ultraviolet range for the mixtures was observed.