Lifetime prediction and kinetic parameters of thermal decomposition of basin insulator by thermal analysis

Abstract

Reliable detection of latent insulation defects and accurate assessment of remaining life of GIS basin insulators are urgently needed to explore more effective detection and characterization methods. The aging and degradation of basin insulators is actually a chemical reaction process. By calculating kinetic factors such as activation energy, reaction mechanism function, and pre-finger factor, a remaining life prediction method based on the most probable reaction mechanism function is proposed. Thermal weightlessness experiments were carried out on samples of basin insulators produced by Shandong Taikai at different heating rates, and the pyrolysis activation energy of the basin insulators was calculated based on the Flynn-Wall-Ozawa method. The most probable reaction mechanism function followed by the curve, and the pre-finger factor is obtained by deforming the Kissinger method. Finally, based on the most probable reaction mechanism function and rate equation, the life prediction method of basin insulators is established, and the key factors affecting the service life of insulators are discussed.