overhead power line 3 повітряна лінія 3 overhead line 2 замикання на землю 2 повітряна лінія електропередавання 2 Bragg grating 1 Raman scattering 1 air line 1 approximation 1 capacity 1 controlled and uncontrolled shunt reactors 1 current economic intervals 1 earth fault 1 experiment 1 fiber optic sensor 1 ground fault 1 high-frequency processes 1 ice-coating monitoring 1 impedance 1 insulator 1 isolated neutral 1 least-squares method 1 lightning surge 1 method 1 natural power 1 overhead power transmission line 1 phase-differential protection 1 power system 1 reactive power source 1 reliability 1