GAS-COOLING PERFORMANCE IN DISC WINDING OF LARGE-CAPACITY GAS-INSULATED TRANSFORMER

We have developed the gas-cooling system of a 275 kV, 300 MVA class ga s-insulated transformer, In our study model experiments in which gas f low was substituted by water flow equivalently and 2-dimensional numer ical flow analyses and network analyses were conducted, In this paper the outline of the development and optimization condition to get high cooling performance in SF6 gas-disc winding system of the transformer are presented.