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Optimized selection method of high-temperature superconducting direct-current cable

A DC cable and high-temperature superconducting technology, applied in the usage of superconductor elements, design optimization/simulation, data processing applications, etc., can solve the problems of stable operation of the system, critical current of the strip, etc., to improve speed and accuracy degree of effect

Pending Publication Date: 2022-08-05
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, in the non-ideal DC power transmission system, such as when the IGBT is turned on and off, the DC system will also have AC ripple current
In addition, when faults occur on the DC side or the AC side of the DC system, such as short-circuit ground faults, voltage drops and other types of faults, the current flowing through the HTS DC cable will also have harmonic components, making the magnetic field of the strip fluctuate with time , which will have an impact on the critical current of the strip, and then may have a certain impact on the stable operation of the system
At present, there is no scheme for precise winding and optimal design of superconducting tape in high-temperature superconducting DC cables in China.

Method used

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  • Optimized selection method of high-temperature superconducting direct-current cable
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  • Optimized selection method of high-temperature superconducting direct-current cable

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0037] like figure 1 As shown, in superconducting applications, tapes are often wound at a certain angle. In the past design of winding superconducting tapes, for the consideration of saving the amount of superconducting tapes, the smaller value. However, when the winding helix angle of the superconducting cable is different, the direction of the current flowing through the superconducting tape will also change, and then the magnetic field generated by the current will also have a certain difference, and then the change of the external magnetic field will lead to the critical current of the superconducting tape. The change will eventually have a certain impact on the current carrying capacity of the high-temperature superconducting DC cable. In addition, in the non-ideal DC transmission system, such as when the IGBT is turned on and off, the DC system will ...

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Abstract

The invention relates to an optimal selection method of a high-temperature superconducting direct-current cable, which comprises the following steps of: establishing an accurate three-dimensional superconducting cable model by using COMSOL, recording the change of a magnetic field at different winding angles in three-dimensional simulation, recording the change of the magnetic field of a current strip superposed with different harmonic components, and calculating the optimal selection of the high-temperature superconducting direct-current cable. And the magnetic induction intensity is decomposed in parallel and vertical directions, and the per unit value and the reference value which are replaced by the average value of the magnetic induction intensity under different conditions are extracted and compared, so that three-dimensional cable electromagnetic analysis under different conditions can be carried out on cables under different conditions, and the rapidness and the accuracy of cable analysis are effectively improved. Meanwhile, influence factors of anisotropy are analyzed, a basis is provided for winding of the superconducting tape, and the application value of the high-temperature superconducting direct-current cable is explored.

Description

technical field [0001] The invention belongs to the technical field of high temperature superconducting direct current power transmission, in particular to a method for optimizing the selection of high temperature superconducting direct current cables. Background technique [0002] High-temperature superconducting DC cables provide a new transmission method for future power grid construction due to a series of advantages such as small footprint, light cable weight, large transmission capacity, and low transmission loss. The American Electric Power Research Institute has evaluated the economics of high-temperature superconducting DC cables. When the cost of superconducting tape is reduced to less than 50 US dollars / kA m, its economy has a significant advantage over conventional DC transmission technology. With a lot of research on superconducting DC cables, superconducting DC power transmission technology will continue to develop, and the price of superconducting tapes will g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06T17/00G06F30/20
CPCG06Q10/04G06T17/00G06F30/20Y02E40/60
Inventor 杨英杰刘畅赵辰李雨航石雪靖赵彦高群柴海涵白卓王梓霖
Owner STATE GRID TIANJIN ELECTRIC POWER
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