Superconducting direct-current cable modeling method and system
A technology of DC cables and modeling methods, applied in special data processing applications, computer-aided design, design optimization/simulation, etc., can solve the problems of not fully considering quench characteristics and inability to perform short-circuit characteristics.
Active Publication Date: 2021-08-27
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
Superconducting cables have zero-resistance characteristics in the superconducting state, but their electrical properties such as resistance will undergo complex changes in the quenching state. Researchers often only regard superconducting cables as resistance when conducting simulation research on power systems containing superconducting cables. The cable components with a value of zero have not fully considered their quench characteristics, and transient analysis such as short-circuit characteristics cannot be performed.
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[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0072] It should be understood that the step numbers used herein are only for convenience of description, and are not intended to limit the execution order of the steps.
[0073] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an"...
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The invention provides a superconducting direct-current cable modeling method and system. The method comprises the steps of according to the size relation between the current temperature of the superconducting layer and the critical temperature of the superconducting layer, and the size relation between the current density of the current temperature of the superconducting layer and the critical current density of the current temperature of the superconducting layer, judging whether the superconducting layer is in a superconducting state or a quench state or a normal state, if the superconducting layer is in the superconducting state, outputting the superconducting state resistivity and the real-time temperature of the superconducting layer, if the superconducting layer is in the quench state, outputting quench state resistivity and the real-time temperature of the superconducting laye, if the superconducting layer is in a normal state, outputting the normal resistivity and the real-time temperature of the superconducting layer, and finishing the modeling of the superconducting direct-current cable. According to the method, the superconducting direct-current cable simulation model is built on the PSCAD platform, and a foundation is laid for influence analysis of access of the superconducting direct-current cable to a power grid.
Description
technical field [0001] The invention relates to the technical field of superconducting direct current cables, in particular to a modeling method and system for superconducting direct current cables. Background technique [0002] Compared with conventional cable transmission technology, superconducting cable transmission technology has the advantages of low loss, large capacity, and large ampacity per unit cross-sectional area. Considering that the transmission capacity characteristics, short-circuit characteristics and quench behavior of superconducting cables are quite different from those of conventional cables, it is necessary to conduct a comprehensive simulation analysis of superconducting cables connected to the power grid to obtain their applicable scenarios and better promote Application and development of superconducting power technology. [0003] Power system simulation software such as PSCAD / EMTDC and PSS / E do not have ready-made superconducting cable components,...
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IPC IPC(8): G06F30/20G06F119/08
CPCG06F30/20G06F2119/08
Inventor 黄振邰彬吴吉汪政余欣王增彬金之俭陈煜
Owner GUANGDONG POWER GRID CO LTD