Temperature Rise Characteristics of Power Cable and Its Current Carrying Capacity Calculation
Power cables are usually laid underground,so once failure occurs,it is difficult to find and repair in time.By studying the temperature rise characteristics of power cables and calculating the current carrying capacity,the occurrence of cable faults can be effectively reduced.Combined with simulation experiment,optimization algorithm and experimental data induction,temperature field analysis and current-carrying capacity calculation are completed.In order to ensure the accuracy of finite element calculation,the optimization algorithm is used to correct the model.The corrected finite element model is input into the external conditions and the maximum allowable temperature of power cable conductor for long term heating,and the cable carrying capacity is obtained by iterative calculation.By analyzing the simulation test data,the functional relationship between the load capacity of power cable and the external environment is summarized,and the dynamic load capacity of power cable can be quickly estimated.Through the calculation of temperature field and carrying current,the threshold value of power cable current is obtained,which can take into account the safety and reliability of the cable and make full use of the transmission capacity of the cable.
power cablefinite elementtemperature fielddata analysiscurrent carrying capacity
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