Research on Voltage Drop and Power Loss for GIL and Overhead Line

Abstract

Gas insulated metal-enclosed transmission line (GIL) is a substitute for overhead line, when used for power transmitting in complicated geographical or geological environment. Aiming at applying GIL better in industry, firstly, calculation methods for basic electrical parameters of GIL are presents. Comparison between GIL and overhead line are also shown. Then, based on the results, voltage drop and power loss for GIL and overhead line are discussed and analyzed in theory. The conclusion shows that performance of GIL is better than overhead line. Finally, correctness of the theoretical analysis is proved by the ATP simulation.