Efficiency study of the reactive shunt compensation device in power lines A. Udaratin, A. Alyunov, A. Krutikov, L.R. Mukhametova, O.O. Zaripov and I.V. Bochkarev E3S Web Conf., 124 (2019) 02020 Published online: 25 October 2019 DOI: 10.1051/e3sconf/201912402020