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重点进行高速铁路隔离开关温度的仿真研究,根据热量平衡理论建立隔离开关温升数学模型,以环境温度及设备电流为变量,结合热量对流及辐射等相关传热学理论,运用MATLAB仿真软件设计了仿真程序,得出隔离开关温度变化规律的三维仿真图形。使用实际电流及环境温度数据对理论仿真结果进行验证,并与使用红外热成像仪实际测量的设备温度曲线进行对比,以评估仿真结果的精确度。研究结果显示,该模型具有较高的精确度,符合设备的实际温度变化情况。通过环境温度及设备电流来反映设备温度的手段,可以避免对设备温度进行反复现场测量,减少工作量,这将为铁路运营的监控及行车安全提供有力保障。
Based on the theory of heat balance, a mathematic model of the temperature rise of the isolating switch is established. Taking the ambient temperature and equipment current as variables, the heat transfer theory of heat convection and radiation is put forward and the simulation software is designed by MATLAB Simulation program, come to the three-dimensional simulation of isolation switch temperature changes in the graphics. The theoretical simulation results are verified using actual current and ambient temperature data and compared with the actual measured temperature profile of the device using an infrared thermal imager to evaluate the accuracy of the simulation results. The results show that the model has high accuracy and meets the actual temperature change of the equipment. By means of ambient temperature and equipment current to reflect the temperature of equipment, it can avoid repeated on-site measurement of equipment temperature and reduce workload, which will provide strong protection for railway operation monitoring and traffic safety.