抄録
Corona attenuation and distortion of lightning surge voltage is an important factor in insulation design. An experimental investigation and a simulation of the voltage waveshapes propagation on 1, 2, 4-conductor bundle transmission line have been carried out. However, the propagation characteristic on a UHV 8-conductor bundle transmission line has not been measured. This paper describes the lightning surge propagation characteristics with corona discharge measured on an actual UHV 8-conductor bundle transmission line. The propagation of a lightning wave is simulated with EMTP, taking the skin effect and the corona effect into account. A comparison between the measured and the calculated results shows that the effect of corona can be modeled by a simple RC equivalent circuit. The model parameters are numerically obtained by fitting the calculated results to the measured results. The resistance and the capacitance are identical to the conventional model.
