Автоматизований комплекс діагностики та неперервного контролю системи охолодження потужних автотрансформаторів

Abstract

The thesis is devoted to the improvement of large power autotransformers (AT) operation through the use of automated continuous monitoring complex of AT cooling system. It allows detecting malfunctions at an early stage of their occurrence in in operating conditions. The new method for continuous monitoring of AT cooling system in operating conditions was introduced. It takes into account both diagnostic parameters of cooling system, integrated heating characteristic of AT and the concentration of dissolved gases and moisture in oil. The improved thermal mathematical model of AT to clarify the oil temperature calculation was suggested. For the first time, the method of thermal model parameters identification was received. It is based on the use of on-line measurements, results of AT thermal testing and application of stochastic optimization methods. The developments were realized in the on-line monitoring system, which was installed on the substation. The main results of installation were analyzed; the main practical advices were formulated.