The Development Of Aging Test Platform Of Organic Insulation Materials And The Study On Materials Aging Characteristics

At present, the aging issues of organic insulation materials such as silicone rubber have threaten the stability and reliable operation of power transmission lines. A set of aging test platform of organic insulation materials has been developed in this paper. The corona and UV aging tests of high temperature vulcanization (HTV) silicone rubber have been carried out using the new developed platform.Aging test platform includes corona aging test system, UV aging test system and analysis system. The corona and UV aging experiments for multiple insulation materials can be carried out using the new developed platform. The test environment can be controlled. The voltage and current can be monitored as well. The hydrophobicity measurement, hardness measurement and other analysis of aged materials can be taken by the analysis system.In this paper, the UV aging characteristics of HTV silicone rubber samples have studied using the UV aging test system. The results show that after 1000 hours UV aging test, the hydrophobicity of HTV silicone rubber surface has little change. HTV silicone rubber is much harder and rougher. The surface became rugged, and the filler has the trend of exposure.In this paper, the corona aging characteristics of HTV silicone rubber samples have also studied by use of the corona aging test system. The results show that after corona there are some holes and cracks in the HTV silicone rubber surface. Under the corona duration, HTV silicone rubber samples lose the hydrophobicity gradually. Under the same voltage level, with the corona time increased, the hydrophobicity recovery process becomes slow. When only under the electric field without corona discharge, the hydrophobicity of silicone rubber surface basically has no change. When the applied voltage is higher than the corona inception voltage, with the corona voltage increases, the hydrophobicity loss of samples gradually become faster.The availability and stability of organic insulation materials aging test platform have been proved by all the tests.