Research of Lightning Impulse Voltage Distribution in Dry Type Transformer Winding

It is important to have knowledge of parts of transformer under high voltage during designing of transformer, because of withstanding of transformer against to lightning impulse make lifespan of transformer longer. oil-immersed type transformer lightning impulse modeling has been carried out frequently in the past. studies on dry type transformer lightning impulse modeling gains more important because of growing marketing share of it. this study differs from old studies because during studies, cast resin insulated layer type coils with rectangular shape wire are used as dry type transformer windings. first, it has given an explanation about importance of dry type transformer which have very straight endurance to force because of their solid windings and ladder type network model. then, some calculation methods of lc parameters of transformer have been given. finally a solution method of matrix obtained from node equations has been presented and lightening impulse voltage distribution in dry type transformer winding is obtained.