3D 打印环保型 10 kV 支撑绝缘子的电气性能

Most of the support insulators in high-voltage power equipment are made of thermosetting epoxy resin. Since these insulators are difficult to be recycled after decommissioning, it results in serious environmental pollution and a great waste of resources. To solve these problems, this paper uses thermoplastic polycarbonate (PC) to manufacture 3D printed samples. The dielectric spectrum, volume resistivity and power frequency breakdown field strength of 3D printed PC were investigated. Furthermore, a 3D printed environment-friendly 10 kV support insulator was also manufactured. The flashover voltage and partial discharge of the insulator were studied. The experimental results show that the 3D printed PC has excellent electrical properties, approaching or even exceeding the performance of epoxy resin. For the 3D printed environment-friendly 10 kV support insulator, its insulation properties meet the requirements of the relevant standards. The flashover voltage and partial discharge inception voltage are 69.7 kV and 36.1 kV, respectively, which are much higher than the standard operating voltage, and close to the properties of 10 kV epoxy resin support insulators. It can be seen from the analysis that problems in technological processes such as 3D printed surface laminar structure, internal porosities and insert mounting defects have negative impacts on the electrical properties of the insulator. These problems can be improved by polishing, optimizing the printing parameters and enhancing the mounting of the inserts, respectively.