Accessories are the weak link in the cable line.Temperature is an important parameter to reflect the running state of the cable.It is of great significance to research the operating temperature of el-bow joint in the ring net cabinet.A mathematical model of the three-dimensional transient magnetic-heat-flow coupling field of elbow joint in cabinet is established,and its calculation correctness is veri-fied based on the step current temperature rise test.The multi-physical field distribution and tempera-ture temporal and spatial distribution of elbow joints in harsh summer is simulated,and different factors on the temperature and temperature difference of elbow joints are studied.The results show that the skin temperature difference of elbow joint is less affected by the ambient temperature and the shape of load curve,and has a quadratic relationship with the peak load current,and increased linearly with the resist-ance ratio,which can be used as the parameter to identify the crimping condition of elbow joint.Crimp status assessment of elbow joint was proposed based on skin temperature difference,which has important reference value for the joint temperature monitoring and fault warning.
关键词
肘型电缆接头/压接状态评估/多物理场仿真/暂态温度/温升试验
Key words
elbow cable joint/crimp status assessment/multi-physical field simulation/transient temperature/temperature-rise test
维普
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