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Terminal vertical connection structure of three-phase same-core superconducting cable and superconducting current limiter

A technology of superconducting current limiter and superconducting cable, which is applied in the field of superconducting power transmission and transformation, can solve the problems of heat leakage, high operating cost and high cost, and achieve the effect of improving efficiency and reducing manufacturing cost

Inactive Publication Date: 2019-10-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing connection method is that the single-phase superconducting cable and the superconducting current limiter need to be connected in series with two bushings, which are independent of each other, and the current leads in the bushings are connected across the room temperature (grid) to the low temperature environment, but this connection method will Causes constant heat leakage, so this existing connection is expensive to run and build

Method used

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  • Terminal vertical connection structure of three-phase same-core superconducting cable and superconducting current limiter
  • Terminal vertical connection structure of three-phase same-core superconducting cable and superconducting current limiter
  • Terminal vertical connection structure of three-phase same-core superconducting cable and superconducting current limiter

Examples

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Effect test

Embodiment 1

[0020] Vertical non-detachable connection of three-phase core superconducting cable terminal cryogenic vessel and superconducting current limiter cryogenic vessel:

[0021] Take the phase C of a cryogenic vessel of a triple core superconducting cable and a cryogenic vessel of a superconducting current limiter as an example: as shown in Fig. The opening of the pipeline 3-2; the C-phase superconducting cable 1-3 is connected to the input end of the C-phase superconducting current limiter coil 6-1 through a superconducting cable or an insulated flexible copper cable 4-3, and the superconducting cable terminal is connected to the cryogenic container The cryogenic vessel of the superconducting current limiter is connected by a flexible heat-insulating pipe, and there is a shielding layer 2 between the three-phase superconducting cables; the high-voltage bushing 8 is fixed in the center of the current limiter cover plate 5, and the superconducting current limiter coil 6-1 The output...

Embodiment 2

[0024] The vertical detachable connection of the three-phase core superconducting cable terminal cryogenic vessel and the superconducting current limiter cryogenic vessel:

[0025] Take the phase C of a cryogenic vessel of a three-phase core superconducting cable and a superconducting current limiter cryogenic vessel as an example: as shown in Figure 1, the inner pipe 3-1 and the outer pipe 3-1 at the top of the cryogenic vessel at the end of the three-phase core superconducting cable The opening of the pipeline 3-2, the flange 10 is installed at the opening of the inner and outer pipelines respectively; the C-phase superconducting cable 1-3 connects with the C-phase superconducting current limiter coil through the superconducting cable or insulated flexible copper cable 4-3 The input end of 6-1 is connected, and the cryogenic vessel at the end of the superconducting cable is connected with the cryogenic vessel of the superconducting current limiter by a flexible insulated pipe...

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Abstract

The invention relates to a terminal vertical connection structure of a three-phase same-core superconducting cable and a superconducting current limiter belonging to the technical field of superconducting power transmission and transformation. The vertical connection structure is composed of a superconducting cable terminal low-temperature container, a superconducting current limiter low-temperature container, a current lead with a high-voltage bushing and a thermal insulation pipeline for connecting the superconducting cable terminal low-temperature container to the superconducting current limiter low-temperature container; the end part of the three-phase superconducting cable in the superconducting cable terminal low-temperature container needs to be respectively connected with corresponding three-phase superconducting current limiter input ends in the current limiter low-temperature container through the thermal insulation pipeline; and the output end of the superconducting currentlimiter is connected with the current lead with the high-voltage bushing. The number of high-voltage bushings is reduced by half in the invention; therefore, the manufacturing cost is greatly reduced;heat leakage also can be effectively reduced; the operating cost of a liquid-nitrogen cooling system is greatly reduced; the benefit is improved in the operation process of a power grid; and the structure is also suitable for vertical connection of a single-phase and three-phase coaxial superconducting cable low-temperature container and a superconducting current limiter low-temperature container.

Description

technical field [0001] The invention relates to the technical field of superconducting power transmission and transformation, in particular to a terminal vertical connection structure of a three-phase core superconducting cable and a superconducting current limiter, specifically a three-phase core superconducting cable terminal cryogenic container and a superconducting current limiter. The vertical connection structure and connection method of the cryogenic container at the terminal of the superconducting current limiter, the vertical connection structure is also applicable to single-phase. Background technique [0002] With the development of the times, the city's demand for electric energy is increasing, and the transmission capacity of existing transmission lines has been difficult to meet the increasing load requirements. If the fault current exceeds the breaking capacity of the existing circuit breaker, it will seriously endanger the relevant electrical systems in the sy...

Claims

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Application Information

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IPC IPC(8): H01R4/68H01R43/00
CPCH01R4/68H01R43/00
Inventor 刘思聪王银顺李继春
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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