动车组固体绝缘隔离开关电场仿真优化设计

Electric Field Simulation and Optimization Design for Solid-insulated Disconnectors of EMUs

为了确保动车组在高海拔环境的安全运行,研究了在动车组高压设备中应用固体绝缘技术。通过对额定电压31.5 kV、工频耐压100 kV的固体绝缘隔离开关进行电场仿真分析,发现电场强度在各绝缘介质中的最大值分别为22.37 kV/mm与7.65 kV/mm,超过各绝缘介质规定场强最优值。通过改变屏蔽网结构、增大绝缘层厚度、增加金属屏蔽网,将场强最大值分别降低为14.93 kV/mm与2.61 kV/mm,达到规定场强标准。通过工频耐压试验验证了固体绝缘隔离开关的优化设计达标。

In order to ensure the safe operation of EMUs in high-altitude environments,this paper explores the application of solid insulation technology in high-voltage equipment of EMUs.Through electric field simulation analysis of a solid-insulated disconnector with a rated voltage of 31.5 kV and a power frequency withstand voltage of 100 kV,it was found that the maximum electric field in each insulation medium was 22.37 kV/mm and 7.65 kV/mm,respectively,exceeding the optimal electric field specified for each insulation medium.By changing the structure of the shielding mesh,increasing the thickness of the insulation layer,and adding a metal shielding mesh,the maximum electric field was reduced to 14.93 kV/mm and 2.61 kV/mm,respectively,to meet the specified electric field standards.The optimized design of solid-insulated disconnector has been verified standard-qualified through power frequency withstand voltage tests.