Simulation method of high-temperature superconducting cable

Abstract

The invention discloses a simulation method for a high-temperature superconducting cable, and the method comprises the steps: (1) obtaining a parameter calculation formula of the high-temperature superconducting cable, including critical current density, superconducting layer resistance and superconducting layer temperature; (2) constructing simulation logic of the high-temperature superconducting cable based on a parameter calculation formula; (3) establishing a high-temperature superconducting cable electrical element model based on PSCAD according to the simulation logic; and (4) constructing a simulation model of the high-temperature superconducting cable in the PSCAD, setting a fault through a fault generator for simulation, and analyzing transient characteristics of the high-temperature superconducting cable in a fault state. The core influence factor of the mathematical model of the high-temperature superconducting cable is the temperature of the superconducting layer, the change of the temperature can lead to the change of the critical current density and the resistance of the superconducting layer, and then further influence the change of the temperature, and the cycle is repeated. According to the invention, the electrical element model of the high-temperature superconducting cable is constructed in the PSCAD, and the transient response characteristics of the high-temperature superconducting cable in the fault state can be simulated in real time by applying the fault for simulation.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting cables, and in particular relates to a simulation method for high-temperature superconducting cables. Background technique [0002] As one of the advanced power grid technologies, superconducting power transmission technology can replace conventional metal materials such as copper and aluminum as current-carrying conductors by using the non-resistance characteristics of superconducting materials in the superconducting state, so as to achieve high-density and large-capacity modern power grids. Transmission requirements. Compared with conventional power transmission cables, High-temperature superconducting cables (High-temperature superconducting cables, HTS) have the advantages of large capacity, small area, low loss, environmental friendliness, no electromagnetic radiation and optimized power structure, which can generate huge technical and economic benefits . Therefore,...

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Problems solved by technology

However, since the resistivity of the superconducting layer is greatly affected by the current density and temperature, and the heat capacity of the superconducting tape of the YBCO high-temperature superconducting cable is much smaller than that of the conventional conductor, the transient state of the high-temperature superconducting cable will be reduced when the fault current occurs. Responses can get complicated

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