Study on Performance Modification of Insulation Wraps for Power Transmission Line Corona Noise Prevention

Study and prevention of transmission line corona noise has become an important means to effectively promote the environmental friendliness and energy saving of transmission line. Studies have shown that using hydrophilic coating treatment on the conductor surface, so that under the condition of precipitation, the rainwater can be evenly distributed on the conductor surface to reduce the formation density of water droplets, which can weaken the impact of raindrops on the curvature radius of the conductor. As a result, less distorted electric field and soft noise were produced, leading to reduce corona noise ultimately. The greater hydrophilicity of the conductor surface, the more significant the reduction of corona noise is. In this paper, experiments have validated that the modification of nano aluminum oxide by electron beam radiation graft technology can improve its surface reactivity, promote its dispersion and bonding ability in RTV rubber matrix, and then elevate the hydrophobicity, mechanical properties and aging resistance of modified RTV silicone rubber. In addition, specific properties of thermal conductivity and hydrophobicity can be improved by further adding functional monomers.