Abstract: Conductor de-icing changes the spatial coupling between phase conductors and overhead ground wires, causing fluctuations in induced voltage and equivalent capacitance and potentially producing primary-side overvoltage in the energy-harvesting reactor. This paper proposes an equivalent-parameter calculation and active regulation method that accounts for the dynamic response of conductor de-icing. A fast calculation model is developed by representing conductor motion with its time-varying average height above ground. Finite-element simulations are then used to evaluate the effects of ice thickness and de-icing rate, and a self-excited magnetic-state regulation strategy is introduced. The results show that both factors significantly affect the equivalent parameters; under heavy icing, the time histories exhibit a distinct “double-peak-dip” pattern. By dynamically adjusting reactor inductance, the proposed strategy suppresses primary-side overvoltage while maintaining high harvested power. The transient average and steady-state powers are 801.02 W and 749.61 W, respectively. The method supports parameter calculation and safe operation of tuned overhead-ground-wire energy-harvesting systems under de-icing disturbances.

Key words: overhead ground wire, tuned energy harvesting, conductor de-icing, equivalent parameters, magnetically controlled reactor