Mathematical analysis for the electrical performance study of RTV silane epoxy resins in tropical climate

摘要

Mathematical analysis for studying the electrical performance of polymeric insulation materials in tropical climate is a multiple regression model. It is derived from statistical science combined with statistics toolbox from Matlab programme. For engineering point of view, it could be applied for silane epoxy resins, for some purpose, namely, 1) to prove ageing mathematical model by means of data obtained from the natural and acceleration ageing, 2) to determine optimal performance of sample placed in tropical climate area, and it was found that the best performance belonged to sample coded RTV₂₄, 3) to predict service lifetime of samples, which depend on critical electrical field (V_fo/L) and design criteria of electrical insulator, 4) to determine the correlation between natural and acceleration ageing, which is represented by acceleration ageing factor, determined by ultraviolet radiation, temperature, and humidity, the value of which are 77, 2, and 2 respectively. By this method, natural aging test which takes long time and high cost is not necessary to be performed, since accelerated ageing performance could predict the performance of natural ageing. With the use of multiple regression model, it can be concluded that the silane treatment of the filler with the dose of 40 %, or specimen code of RTV₂₄ resulted in optimal performance in the tropical climate. Therefore, these materials can be proposed as insulator materials for high voltage transmission line in tropical area, and as an alternative substitution for porcelain and glasses.