Experimental investigation and modeling of corona characteristics under lightning impulses

摘要

AbstractAn experimental study is conducted on the corona characteristics under lightning impulses. The charge-voltage characteristics, i. e. theQ-Ucurves, are measured in a corona cage. The impulse waveshapes are varied to investigate their influence on theQ-Ucurves. Meanwhile, a corona model is proposed to compute theQ-Ucurves. The ionized zone is simplified as a cylindrosymmetric geometry and a one-dimensional subdivision is made in the radial direction. TheQ-Ucurves can be given by performing an efficient computational procedure. The computed results are compared with the measured ones to check the validity of the model.Highlights?The influence of lightning impulse voltage waveshapes on corona characteristics has been investigated in the corona cage.?An analysis has been made for the experimental results in terms of the gas discharge mechanism.?