Adjustable-inductance solenoid type superconducting current limiter

A solenoid type superconducting and solenoid technology, applied in the field of superconducting current limiters

Inactive Publication Date: 2020-07-10
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, for the solenoid in reverse series, the effect of suppressing the fault current is weaker than that of the current limiting unit containing inductance at the fault current limiting moment.

Method used

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  • Adjustable-inductance solenoid type superconducting current limiter
  • Adjustable-inductance solenoid type superconducting current limiter
  • Adjustable-inductance solenoid type superconducting current limiter

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Embodiment Construction

[0018] The following will be combined with Figure 2-3 The present invention is described in further detail.

[0019] Such as figure 2 As shown, it shows an adjustable solenoid type superconducting current limiter, which includes 8 solenoids 1 connected in series, wherein the first solenoid is in reverse series with the second one, and the second one And the third forward in series, the third and the fourth in reverse series, the fourth and the fifth in reverse series, the fifth and the sixth in forward series, the sixth and the seventh in reverse In series, the seventh and eighth are forward in series. Such as image 3 As shown, through the finite element simulation software for Figure II A simulation was carried out to get Figure II structure with an inductance of 0.43mH, the figure 1 The superconducting current limiter simulation of the structure shows that the inductance of the superconducting current limiter is 0.06mH. Such as image 3 As shown, it is the two-d...

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PUM

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Abstract

The invention relates to an adjustable-inductance solenoid type superconducting current limiter, which comprises a plurality of solenoids connected in series. Superconducting coils are fixed to a solenoid type current limiter framework through current leads, and different solenoids are connected through the current leads on the solenoid type superconducting current limiter framework, wherein the connection modes of every two adjacent solenoids in the solenoids connected in series comprise a reverse series connection mode and a forward series connection mode. On one hand, the solenoid connection mode can be selected to make the influence on a power grid under a normal operation condition small; and on the other hand, the solenoid connection mode can select a connection mode with good impactcharacteristics and high fault current suppression rate. Solenoid connection modes under the two conditions are analyzed, and a connection mode with good characteristics under the two conditions is selected.

Description

technical field [0001] The invention relates to a solenoid-type superconducting current limiter with adjustable inductance, belonging to the technical field of superconducting current limiters. Background technique [0002] With the expansion of power grid capacity, the short-circuit current value continues to increase, which seriously threatens the safety of equipment and people. With the increase of the voltage level, the breaking capacity of the circuit breaker can no longer meet the needs of the power grid. Therefore, some measures to limit the short-circuit current are required before the circuit breaker is disconnected. Such as using air-core reactors, thermistors, high internal resistance transformers, and thyristors that can be turned off to limit current, but these methods will bring negative effects to the system or have limitations in use conditions. The superconducting current limiter has little impact on the power grid during normal operation, and can effective...

Claims

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Application Information

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IPC IPC(8): H02H9/02H01F6/06
CPCH01F6/06H02H9/021Y02E40/60
Inventor 马韬张静戴少涛胡磊王邦柱张腾
Owner BEIJING JIAOTONG UNIV
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