Comparison of Grounding Grid Parameters Between Copper and Galvanized Flat Steel Yue Yu, Yanjun Li, Dehong Wang, Rongtian Du, Chongqing Jiao and Jiwei Sun E3S Web Conf., 267 (2021) 02058 Published online: 04 June 2021 DOI: 10.1051/e3sconf/202126702058