Electrostatic Field Analysis of 1200 Kv Testing Transformer by Boundary Element Method

Design of a 1200 kV power transformer is a real challenge for designer from dielectric point of view. It is possible to design a more compact transformer meeting even higher insulation levels with lesser insulation content. This has been possible with the introduction of sophisticated Computer-Aided Electrostatic Field Analysis. Analysis of the Lead Exit assembly of 1200 kV HV is presented. Two-dimensional contours of the three-dimensional equipotential and equigradient contours are presented in selected vertical planes. The paper gives an insight into various high stress areas of a 1200 kV Lead assembly and measures taken to improve the stresses.