Electric heating parameter obtaining method of superconducting cable

Abstract

The invention relates to an electric heating parameter obtaining method of a superconducting cable. The method comprises the following steps: S1, obtaining structural parameters, material characteristics and line laying conditions of the superconducting cable; s2, obtaining boundary conditions according to laying conditions, and obtaining a constitutive equation according to structure parameters and material characteristics; s3, establishing a two-dimensional finite element model according to the constitutive equation, the boundary condition and the partial differential equation equivalent resistivity; s4, performing transient solution of the two-dimensional finite element model according to the current of the superconducting cable to obtain an alternating current loss characteristic curve of the superconducting cable; and S5, performing steady-state solution of the two-dimensional finite element model according to the alternating-current loss characteristics of the superconducting cable to obtain temperature field distribution of the superconducting cable in the steady-state operation process. Compared with the prior art, the complexity of calculation is reduced, and the convergence of the model is improved.

Description

technical field [0001] The invention relates to the field of high-temperature superconducting cables, in particular to a method for obtaining electrothermal parameters of superconducting cables. Background technique [0002] In recent years, with the rapid development of urbanization and industrialization, high temperature superconducting (High Temperature Superconducting, HTS) technology, as a leading technology with strategic significance, has shown a wide range of applications in the fields of urban power grid transformation, magnetic levitation transportation, and large scientific devices. Application prospects. High-temperature superconducting power transmission, known as a revolution in the power industry in this century, has the advantages of low loss, large capacity, small size, and no pollution. At present, there are many superconducting cables in operation worldwide, such as the Albany superconducting cable project in the United States, the Yokohama superconductin...

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Problems solved by technology

[0004] Due to the zero-resistance characteristics of superconducting materials within a certain range, traditional analysis methods often regard the circuit structure of superconducting cables as parallel pure inductance components, without considering its dynamic change characteristics, but because of the high resistivity of superconducting materials Non-linearity, as well as the fluid characteristics of the cooling medium liquid nitrogen, coupled with the relatively complex geometric structure, so the calculation of the solution is relatively large

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