The Computational And Experimental Research On10kV Three-core Cable Temperature Field Of The Cable Trench

Along with the social production and the demand of electric power and growing, thesociety has the increasing requirement for the transmission reliability. In many cable layingmode, the cable trench laying way has the province, covers an area of less investment, to agileand can accommodate more cable, increase cable back to him, need not work well, cable inand out of convenience by widespread application. The cable trench inside the cluster layingsituation is very common. In order to ensure the safety and stability of the power cable canoperation, the cable trench laying mode of temperature field calculation is very meaningful.This paper makes a study of the cable trench laying10kV three-core cable temperaturefield calculation. According to the three-core cable set up hot road model, at the same time toIEC60287on the filling sand in cable trench inside temperature of the temperature rise in theempirical formula applicability. Compile the complete cable duct laying cable coretemperature calculation software and cable load flow calculation software. In cable trenchlaying down three core cable load flow test research, complete software correctnessverification. Finally, using the finite element analysis software ANSYS as a software platform,the simulation multi-loop laying cable under the temperature field distribution, and also putforward the detection scheme.Conclusions:1. The formula on cable inner temperature rise is correct, but in the air temperature intrench is based on the soil temperature. The external thermal resistance calculation using thehighest temperature in the trench in accordance with the related formula of air without the sun2. Make use of certified software gives cable duct laying much loop correction coefficientrecommended value3. By using ANSYS software to simulate the multi-loop laying of cable trenchtemperature field distribution, found in the outer air convection phenomenon existing in thetrench, the highest temperature appears in the central upper. Upper cable skin temperatureshould be monitored, ensure the safety of cable in the cable trench effective operation.