Method for calculating strip magnetic field in high-temperature superconducting cable

Abstract

The invention relates to a method for calculating a strip magnetic field in a high-temperature superconducting cable, which comprises the following steps: S1, acquiring the current distribution of each layer of strip of the superconducting cable according to the structural parameters of the high-temperature superconducting cable; S2, establishing a hollow cylinder model with uniformly distributed current, and calculating the conductor magnetic field distribution corresponding to the current of each layer of strip based on the Biot-Savart law and the Ampere's circuital law; and S3, carrying out calculus processing on the conductor magnetic field distribution to obtain strip magnetic field distribution, and calculating a strip superposition magnetic field according to a magnetic field superposition principle. Compared with the prior art, the method has the advantages that on the basis of the Biot-Savart law and the Ampere's circuital law, the magnetic field of the strip in the superconducting cable is calculated by combining a calculus method; the magnetic field distribution condition of the strip gaps in the superconducting cable can be obtained point by point, the magnetic field distribution of each point of the strip gaps is comprehensively reflected, meanwhile, the calculation method is simple, a complex simulation model does not need to be established, and the calculation method is easy to master.

Description

technical field [0001] The invention relates to the technical field of high-temperature superconducting cable magnetic fields, in particular to a method for calculating the magnetic field of a strip inside a high-temperature superconducting cable. Background technique [0002] In recent years, with the rapid development of my country's economy, electricity consumption has grown rapidly. Especially in economically developed big cities, the transmission capacity of traditional underground cables can no longer meet the needs of users. The underground space resources in big cities are particularly tight. The laying of new power cable lines requires the excavation of new cable tunnels, which is difficult and expensive. Compared with traditional cables, the transmission capacity of high-temperature superconducting cables is 3 to 5 times that of traditional cables. If traditional power cables are replaced with high-temperature superconducting cables in the original transmission ca...

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Problems solved by technology

[0004] At present, for the calculation of the magnetic field of the inner strip of the superconducting cable, the main calculation methods are analytical method and numerical method: when the existing analytical method calculates the magnetic field of the superconducting strip, Assume that each layer of strip is a surface, and calculate the magnetic field at the center of the strip thickness as the magnetic field of each layer of strip. This analytical calculation model simplifies the calculation to a certain extent, but it cannot fully reflect the gap of each layer of strip. The magnetic field distribution at

[0005] Existing numerical methods can calculate the magnetic field of the inner strip of the superconducting cable, and the distribution of the magnetic field at the gap of the strip can be obtained point by point, but the inner strip structure of the superconducting cable It is complex, and it is difficult to establish a simulation model in the process of numerical calculation. At the same time, numerical simulation has high requirements for software and hardware configuration, and technical personnel are required to specialize in the installation and use of software.

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