INFLUENCE OF TRANSFORMER LAYER WINDING PARAMETERS ON THE CAPACITIVE CHARACTERISTIC COEFFICIENT

With changing the parameters of layer winding in transformers, capacitive characteristic coefficient of winding will be changed. Since, impulse voltage distribution (IVD) along a winding is depended on this coefficient, so analyzing this coefficient is important in transformers. This paper study and analyze a transformer with layer winding and rectangular cross-section. In this study, the influence of changing the layer winding transformers parameters (LWTP) on capacitive characteristic coefficient is going to be analyzed which may be a new research in this study. Also, in this study the equations for capacitances between winding turns in different layers and also equations for capacitances between turns and core in different layers are derived. The presented relationships are dependent on the parameters of the transformer winding, so changing these parameters will change turn-turn capacitance (TTC) and turn-core capacitance (TCC) and finally change the capacitances of the total series and parallel of the winding. The aim of this paper is to illustrate the effect of parameters deviations on the capacitances of the total series and parallel of the winding and show these effects on the results of the capacitive characteristic coefficient of the winding.