Estimation of 500 kV power transmission line parameters with PMU Yuri Kononov, Evgenii Zelenskii, Olga Rybasova, Dmitrii Kostyukov and Ekaterina Bakaushina E3S Web Conf., 279 (2021) 01014 Published online: 01 July 2021 DOI: 10.1051/e3sconf/202127901014