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liquid metal restrictor

A liquid metal and current limiter technology, applied in electrical components, electrical switches, circuits, etc., can solve the problems of slow response speed and potential safety hazards of electrical equipment, and achieve the effect of fast response speed and prevention of potential safety hazards.

Active Publication Date: 2020-01-17
YUNAN JINGCHUANG LIQUID METAL THERMAL CONTROL TECH RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the objectives of the present invention is to provide a liquid metal current limiter to solve the problem in the prior art that the reaction speed of the fault current limiter is slow and easily causes safety hazards to electrical equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] See figure 1 and figure 2 , the liquid metal current limiter of Embodiment 1 includes a casing, an electrode 1 and an insulating separator 16 . A first chamber is formed inside the casing, and liquid metal 14 is contained in the first chamber, and the electrode 1 includes a first electrode 101 and a second electrode 102, both of which extend into the first electrode 101 and the second electrode 102 from the casing. Inside a chamber, an insulating partition 16 is arranged in the first chamber and divides the first chamber into a plurality of first sub-chambers, and a through hole 17 is formed on the insulating partition 16, adjacent to the first sub-chamber They communicate with each other through the through hole 17. The first electrode 101, the second electrode 102 and the insulating barrier 16 satisfy: when the first electrode 101 and the second electrode 102 are connected to a normal circuit, a current is formed between the first electrode 101 and the second elect...

Embodiment 2

[0068] The difference from Embodiment 1 is that in Embodiment 2, a pressure sensor is provided in the first sub-chamber to measure the pressure value of the liquid metal 14 in the first sub-chamber and send it to the controller, and the controller The conversion assembly is controlled according to the pressure value. Specifically, when the pressure value is higher than the set value, the controller controls the rotating shaft 19 to rotate, and makes the accommodation tank 12 communicate with the first sub-chamber; when the pressure value is not higher than the set value, the controller controls the rotating shaft 19 to rotate , and make the accommodating tank 12 and the first sub-chamber isolated from each other.

[0069] In this case, through the cooperation between the pressure sensor and the controller, the control of the conversion component can be realized, which can realize more precise control of the liquid metal flow restrictor.

Embodiment 3

[0071] The difference from the first embodiment is that no conversion component is provided in the third embodiment. Moreover, a second chamber is also formed in the casing, and a first one-way valve (not shown in the drawings) is arranged between the second chamber and the first chamber. When the pressure of the liquid metal 14 exceeds a set value, the first one-way valve A one-way valve conducts along the direction from the first chamber to the second chamber.

[0072] In the third embodiment, through the setting of the second chamber and the first one-way valve, the pressure of the first chamber can be relieved to prevent the shell from being damaged, or the liquid metal 14 can be re-pressed into the flow hole 17 to cause the liquid metal to be limited. Streamer fails.

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Abstract

The invention relates to the field of electric switches, and provides a liquid-stage metal current limiter. According to the liquid-stage metal current limiter, a first cavity is formed in a shell; liquid-state metal is contained in the first cavity; an electrode comprises a first electrode and a second electrode; both the first and second electrodes extend into the first cavity from the shell; aninsulating separation plate is arranged in the first cavity to divide the first cavity into a plurality of first sub-cavities; through holes are formed in the insulating separation plate; adjacent first sub-cavities are communicated through the through holes; and when the first and second electrodes are accessed to a normal circuit, current is formed between the first and second electrode and theinsulating separation plate forms a blocking effect for the current. When the circuit has short circuit fault, the liquid-stage metal current limiter can be converted from a low-impedance state to ahigh-impedance stage, so as to restrict short circuit fault current; and the reaction speed is high, and before the fault current reaches a first peak value, the short circuit current can be effectively restricted, so that electric equipment in the circuit is sufficiently protected and potential safety hazards are prevented.

Description

technical field [0001] The invention relates to the field of electrical switches, in particular to a liquid metal current limiter. Background technique [0002] With the increase of load density and overall capacity of my country's power grid, the continuous operation of large-capacity units and the interconnection of power grids in various regions, the short-circuit current level of the power system is increasing day by day. The short-circuit current level of power grids in many regions has reached or even exceeded the power The maximum allowable value defined by the regulations. [0003] The short-circuit fault of the power system is very harmful to the normal operation of the electrical equipment itself and the system. The specific manifestations are: the dynamic and thermal stabilization effects of the short-circuit current will damage the electrical equipment; when the short-circuit fault occurs, the voltage in the power grid will drop, resulting in It cannot work norma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H29/04
CPCH01H29/04
Inventor 李正荣董鑫鄢顺才盛磊刘静
Owner YUNAN JINGCHUANG LIQUID METAL THERMAL CONTROL TECH RES & DEV CO LTD
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