Vliv nesymetrického zatížení na chod trojfázových transformátorů

Abstract

The topic of this bachelor thesis is to analyze the three-phase transformer at an unbalanced load. At first the principle of the transformer and its properties in operating conditions are described along with a theoretical description of the unbalanced load. Following part is focused on measuring the operating conditions of the transformer and zero-sequence impedance measurement. In the last chapter there is an analysis of a three-phase transformer at the unbalanced load. The measurements in four basic circuits were taken in the laboratory. For each measurement, the tables with results were created. From these tables, we are able to determine the behavior of the transformer at the unbalanced load in each connection.