Determination the conductor sag according to the period of own harmonic oscillationsDanil Yaroslavsky, Van Vu Nguyen, Marat Sadykov, Mikhail Goryachev, Dmitry Ivanov and Nikolay AndreevE3S Web Conf., 220 (2020) 01036DOI: https://doi.org/10.1051/e3sconf/202022001036