Design and electrical field characteristics analysis of portable electrically remote-controlled insulation operation device for live replacement of insulator strings on 35kV straight towers

Abstract

With the increasing demand for live-line work on 35kV power lines, improving work efficiency while ensuring safety has become a key issue. This study proposes a portable tool device based on electric remote control technology for live-line replacement of insulator strings on 35kV straight-line towers. The device consists of an adjustable angle fixed base, an electric remote-controlled retractable insulating rod, and a self-locking conductor clamp, effectively reducing the operator's workload and improving safety. Results show that the electric field strength on the conductor surface can reach 250kV/m, but decreases rapidly with increasing distance from the conductor, dropping below 30kV/m in areas above 3 meters. Furthermore, simulation analysis of electric field strength and insulation performance of commonly used insulating materials (such as epoxy resin and composite materials) reveals that the breakdown voltage of the insulating material decreases significantly in areas with strong electric field strength, indicating that the insulating material needs higher withstand voltage capabilities. This study, through electric field distribution simulation and insulation performance evaluation, provides a theoretical basis for the safety of 35kV live-line work and offers a reference for the optimized design of related tools.