Extraction of Equivalent Circuit Parameter of the GIS Pipe Spacer Yonghong Wang, Bing Xiao, Guizhong Qiu, Lipeng Bi, Keqiang Xu, Chongqing Jiao and Shuyun Cao E3S Web Conf., 185 (2020) 01014 Published online: 01 September 2020 DOI: 10.1051/e3sconf/202018501014