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Parallel superconducting fault current limiter

A fault current limiter, superconducting technology, applied in the use of superconductor elements, emergency protection circuit devices for limiting overcurrent/overvoltage, electrical components, etc., can solve the problems of high cost and high material cost, and achieve manufacturing Cost reduction, usage reduction, and usage reduction effect

Inactive Publication Date: 2011-04-20
北京云电英纳超导电力技术有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The material cost of the superconducting wire, which accounts for the largest proportion of materials, is relatively high, and the overall manufacturing cost is relatively high.

Method used

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  • Parallel superconducting fault current limiter

Examples

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Embodiment Construction

[0019] Parallel superconducting fault current limiter of the present invention includes reactance system, direct current control system and cryogenic system, refer to figure 1 As shown, its reactance system consists of an iron core 1, two AC windings 2, 3 connected to the grid 100, and a DC excitation winding 4; the two AC windings 2, 3 are connected in parallel to the grid (wherein: is a switch; DC is a direct current power supply), and the two AC windings are in phase.

[0020] The cross-section ratio of the DC core leg of the DC excitation winding to the AC core leg of the AC winding is 1.01-10.

[0021] The following three aspects analyze the difference between the parallel superconducting fault current limiter and the series superconducting fault current limiter.

[0022] (1) In the steady state, the DC steady-state operating point changes, which greatly reduces the amount of superconducting tape.

[0023] According to the working principle of the superconducting fault...

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Abstract

The invention discloses a parallel superconducting fault current limiter, which comprises a reactance system, a direct current control system and a low-temperature system, wherein each phase of the reactance system consists of an iron core, two alternating current windings and a direct current exciting winding; and the two alternating windings are connected to a grid in parallel, and the two alternating current windings are the same. The ratio of the cross section of a direct current iron core column of the direct current exciting winding and the cross section of the alternating current iron core columns of the alternating windings is 1.01:10. Compared with serial superconducting fault current limiter, the novel superconducting fault current limiter has advantages in many aspects and thus represents a substantial progress in the industrialization process of the superconducting fault current limiter. The superconducting fault current limiter is expected to provide a breach to the further industrialization of the superconducting fault current limiter.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic equipment, in particular to a superconducting fault current limiter. Background technique [0002] In some equipment designed using the principle of saturable reactors, such as saturated iron core type superconducting fault current limiters, etc., it is mainly composed of reactance system, DC control system, low temperature system and other parts, among which the reactance system is mainly composed of iron core, AC winding and Composed of DC field windings. For a three-phase saturated core type superconducting fault current limiter, each phase has two cores 21, two AC windings 22, 23 and one DC excitation winding 24, and the two AC windings are connected in series in a certain way In the power grid 100, the magnetic fields generated by the two AC windings cancel each other on the DC iron core, thereby reducing the influence of the AC induced voltage on the DC excitation winding, while ens...

Claims

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Application Information

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IPC IPC(8): H02H9/02
CPCY02E40/69Y02E40/60
Inventor 张敬因牛潇晔孙燏伟龚伟志信赢王洋
Owner 北京云电英纳超导电力技术有限公司
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