Abstract:The icing phenomenon of overhead grounding lines poses a serious threat to the safe operation of power grids. Therefore, the research on de-icing technology for overhead grounding lines has become an important focus in both academic and engineering fields domestically and internationally. This paper establishes a finite element model of the composite structure of the open line of the ice cover frame. By using prestressed modal analysis, the natural frequency and vibration modes of the open line of the ice cover frame are investigated, the resonant frequency range is determined, and within this range the harmonic response sweep frequency analysis is conducted to identify the optimal excitation frequency. Additionally, the impacts of both the magnitude of the excitation force and the excitation position on the resonant de-icing effect is discussed. A prototype of a resonance de-icing machine was designed and manufactured, and a reduced-scale resonance de-icing test was performed on an overhead ground wire. The test results indicate that the de-icing machine can remove approximately 80% of the ice cover within 8 minutes, demonstrating the feasibility of resonance de-icing technology and providing a reference for the development of resonance de-icing technology for overhead ground wires.