10-kv three-core cable finite element thermal analysis method

Abstract

The invention discloses a 10-kV three-core cable finite element thermal analysis method. The method comprises the steps of 1, determining the geometric structure, size and material parameters of a 10-kV three-core cable; 2, utilizing the Solid Works for building a three-dimensional model according to the geometric structure of the 10-kV three-core cable; 3, importing the three-dimensional model built by the Solid Works into ANSYS and converting the three-dimensional model into a geometric model in the ANSYS; 4, calculating the heat production rate of a heating portion according to the current loaded by the cable and parameters of the heating portion of the cable; 5, loading material parameters of layers in the ANSYS, dividing units and applying loads to obtain the temperature field distribution result of the 10-kV three-core cable. According to the 10-kV three-core cable finite element thermal analysis method, the three-dimensional model building function of the Solid Works and the finite element analysis function of the ANSYS are combined, three-dimensional temperature field simulation of the 10-kV three-core cable is achieved, the operational process is visual and convenient, the model is precise and reliable, the operation efficiency is high, and the method can be popularized in finite element thermal analysis of complex structures like cable intermediate connectors.

Description

technical field [0001] The invention relates to the technical field of 10kV three-core cables, in particular to a finite element thermal analysis method for 10kV three-core cables. Background technique [0002] 10kV three-core cables are widely used for power supply in urban distribution networks. With the increase of urban electricity load, the capacity requirements of distribution network are getting higher and higher, and the current carrying capacity of distribution network cables cannot be ignored. The IEC standard used to calculate the ampacity of cables is superimposed with a variety of harsh operating conditions, making the calculated ampacity too low to meet the load demand. For a long time, the power supply department has had to abandon the ampacity limit calculated by the IEC standard for scheduling, resulting in Distribution network operation and management capabilities are low. The important factor limiting the ampacity of the cable is the heating of the cable...

AI Technical Summary

Problems solved by technology

Existing studies usually take the cross section of the cable for two-dimensional temperature field simulation. For structures with inconsistent geometric shapes in the axial direction, such as cable intermediate joints, two-dimensional simulation cannot obtain accurate temperature field results.

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