Overhead busbar design for 220/66 kv GIS substation

Abstract

The paper is assigned to design a 220/66 KV HV GIS sub-station. It considered incoming power at 220 KV and the power was transferred to main bus through isolator- circuit breaker combination in GAS INSULATED SUBSTATION. The power from GIS was fed into two 100 MVA transformer which stepped the voltage down to 66 KV. The power is then fed into a 66 KV bus from which different loads were tapped and further distributed to respective station. This paper includes brief details about the busbar design and its calculation required in substation to the extent they relate to substation layout. It also covers the effect of temperature rise on different parameters of busbar.