Cable temperature rise test method considering axial heat transfer of cable joint

The invention discloses a cable temperature rise test method considering axial heat transfer of a cable joint, and relates to the technical field of research on heat transfer and temperature rise characteristics of high-voltage cable joints, and the method comprises the steps: building a physical model comprising the cable joint and cables connected with the two ends of the cable joint; under a set critical working condition, establishing corresponding temperature distribution models under different current conditions by using the physical model, determining an axial heat transfer range of a cable joint and the cable, and determining the length of the cable to be tested according to the axial heat transfer range; temperature sensors are arranged on the cable joint and the cable with the determined length at equal intervals, and a temperature compensation device is arranged at the tail end of the cable to measure the temperature of the cable joint and the conductor on the cable. The axial heat transfer problem