Analysis Of The Conductivity Characteristics Of Insulators In Power Systems

In high-voltage transmission line structures, suspension type insulator is essentially a material component with extremely high resistance, used to isolate the potential relationship between the charged conductor and the grounding structure. composite tension insulator material itself lacks the conditions for free electron propagation, meaning it does not act as a current path under normal operating conditions. Typical high voltage transmission line insulators is made of ceramic, glass, or composite polymers; these materials have much lower conductivity than metallic conductors, thus hindering current flow.

In the design practice of transmission facilities, the current path of the line is mainly carried by the conductors. overhead power line insulators structurally supports these conductors while maintaining electrical isolation between the conductors and the towers and poles. Transmission conductors need sufficient cross-sectional area and conductivity to meet the system's current-carrying requirements, while tension insulator, through its dielectric properties, blocks the direct path of current to ground.