CN113764226A - High-capacity quick switching device - Google Patents
High-capacity quick switching device Download PDFInfo
- Publication number
- CN113764226A CN113764226A CN202110943364.3A CN202110943364A CN113764226A CN 113764226 A CN113764226 A CN 113764226A CN 202110943364 A CN202110943364 A CN 202110943364A CN 113764226 A CN113764226 A CN 113764226A
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- China
- Prior art keywords
- voltage
- circuit breaker
- collision type
- circuit
- vacuum contactor
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- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention belongs to the technical field of electricity, and particularly relates to a high-capacity quick switching device which comprises a quick vacuum circuit breaker driven by eddy current repulsion force, an LC resonance circuit unit, a high-voltage collision type quick vacuum contactor, a high-voltage charging unit, a main controller and a straight-through current transformer; the upper end interface of the rapid vacuum circuit breaker is respectively and electrically connected with the negative electrode of the capacitor of the LC resonance circuit unit and the negative electrode end of the output end of the high-voltage charging unit, and the lower end interface of the rapid vacuum circuit breaker is electrically connected with the lower outlet port of the high-voltage collision type rapid vacuum contactor; when a short circuit accident occurs to the system, the high-capacity quick switching device provided by the invention can access the resonant circuit into the main circuit by adopting the collision type quick vacuum contactor, generate resonant current with required frequency, force the current of the main circuit to generate a zero point, and quickly open the fault line, thereby quickly cutting off the fault line, preventing the voltage sag from damaging the system, and protecting the operation safety of the system.
Description
Technical Field
The invention belongs to the technical field of electricity, and particularly relates to a high-capacity quick switching device.
Background
When the neutral point ungrounded system is in operation, single-phase grounding faults often occur and finally short-circuit accidents occur. In the traditional processing method, a comprehensive protection device is used for sampling and judging, and a leading command is sent out, so that a vacuum circuit breaker of a spring operating mechanism is switched off, and the fault line isolation is completed. However, this method has long operation time, and when a fault is processed, the system voltage will be temporarily dropped, and a large-area power failure accident will occur. Therefore, a new technique is needed to quickly isolate the fault line within 5ms of the short circuit of the system, and effectively prevent the large-area power failure accident caused by the voltage sag of the system.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a high-capacity fast switching device capable of quickly cutting off a fault line in the event of a short circuit and preventing a large-area power failure accident caused by a voltage sag.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-capacity fast switch device comprises a fast vacuum circuit breaker driven by eddy current repulsion, an LC resonance circuit unit, a high-voltage collision type fast vacuum contactor, a high-voltage charging unit, a main controller and a straight-through current transformer;
the upper end interface of the rapid vacuum circuit breaker is respectively and electrically connected with the negative electrode of the capacitor of the LC resonance circuit unit and the negative electrode end of the output end of the high-voltage charging unit, and the lower end interface of the rapid vacuum circuit breaker is electrically connected with the lower outlet port of the high-voltage collision type rapid vacuum contactor;
the positive electrode of the capacitor of the LC resonance circuit unit is respectively and electrically connected with the positive electrode end of the output end of the high-voltage charging unit and one end of the inductor of the LC resonance circuit unit, and the other port of the inductor of the LC resonance circuit unit is connected with the upper wiring port of the high-voltage collision type rapid vacuum contactor;
the center of a primary high-voltage winding of the straight-through current transformer is penetrated by a lower outgoing lead of the rapid vacuum circuit breaker;
the output of the main controller is connected to the quick vacuum circuit breaker and the high-voltage collision type quick vacuum contactor, and the input of the main controller is connected to a secondary output interface of the straight-through current transformer.
In a further technical scheme, the high-voltage collision type rapid vacuum contactor adopts a vortex repulsion rapid closing collision type mechanism.
Compared with the prior art, the invention has the following technical effects:
when a short circuit accident occurs to the system, the high-capacity quick switching device provided by the invention can access the resonant circuit into the main circuit by adopting the collision type quick vacuum contactor, generate resonant current with required frequency, force the current of the main circuit to generate a zero point, and quickly open the fault line, thereby quickly cutting off the fault line, preventing the voltage sag from damaging the system, and protecting the operation safety of the system.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic diagram illustrating a high capacity fast switching apparatus according to an embodiment of the present invention;
the reference numbers in the figures illustrate: the system comprises a 1-rapid vacuum circuit breaker, a 2-high voltage charging unit, a 3-high voltage collision type rapid vacuum contactor, a 4-LC resonance circuit unit, a 5-main controller and a 6-straight-through current transformer.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified by combining the specific drawings.
As described above, in conjunction with fig. 1, the present invention provides a high capacity fast switching device, including a fast vacuum circuit breaker 1 driven by eddy current repulsion, an LC resonant tank unit 4, a high voltage impact type fast vacuum contactor 3, a high voltage charging unit 2, a main controller 5 and a feedthrough current transformer 6;
the upper end interface of the rapid vacuum circuit breaker 1 is respectively and electrically connected with the negative electrode of the capacitor of the LC resonance circuit unit 4 and the negative electrode end of the output end of the high-voltage charging unit 2, and the lower end interface of the rapid vacuum circuit breaker 1 is electrically connected with the lower outlet port of the high-voltage collision type rapid vacuum contactor 3;
the positive electrode of the capacitor of the LC resonance circuit unit 4 is respectively and electrically connected with the positive electrode end of the output end of the high-voltage charging unit 2 and one end of the inductor of the LC resonance circuit unit 4, and the other end of the inductor of the LC resonance circuit unit 4 is connected with the upper wiring port of the high-voltage collision type rapid vacuum contactor 3;
the center of a primary high-voltage winding of the straight-through current transformer 6 is penetrated by a lower outgoing lead of the rapid vacuum circuit breaker 1;
the output of the main controller 5 is connected to the fast vacuum circuit breaker 1 and the high-voltage collision type fast vacuum contactor 3, and the input of the main controller 5 is connected to a secondary output interface of the straight-through current transformer 6.
The high-voltage collision type rapid vacuum contactor 3 adopts a vortex repulsion rapid closing collision type mechanism, so that when a system is in short circuit, a main controller 5 firstly sends an instruction to open a contact of a rapid vacuum circuit breaker 1, and simultaneously, an LC resonance circuit unit 4 is connected with a main circuit within 2ms, high-frequency resonance current is generated, the main circuit current is forced to generate a zero point, the main circuit is rapidly disconnected within 5ms, the short-circuit fault circuit is cut off, and the system is protected from being damaged by short-circuit accidents.
The working principle and the using process of the high-capacity quick switching device provided by the invention are as follows:
under the normal condition, whether main control unit 5 takes place to exceed the threshold value from the continuous 6 secondary side sampling current of straight-through current transformer, when exceeding the threshold value, main control unit 5 sends out the instruction earlier and implements the separating brake for vortex repulsion driven quick vacuum circuit breaker 1, then sends out the instruction again and makes 3 contacts of high-pressure collision formula quick vacuum contactor close a floodgate fast, put through LC resonant circuit 4 and main circuit, and produce a high frequency resonance current and flow through vortex repulsion driven quick vacuum circuit breaker 1 return circuit, make main circuit current force to produce the zero point, guarantee vortex repulsion driven quick vacuum circuit breaker 1 that quick arc-extinguishing, the quick excision fault line. And then, the contact of the high-voltage collision type rapid vacuum contactor 3 is rapidly switched on to generate collision and then rebounded to be switched off, and the resonant circuit is opened when the current of the resonant circuit crosses zero, so that the complete switching-off is completed.
The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A high-capacity fast switch device is characterized by comprising a fast vacuum circuit breaker driven by eddy current repulsion, an LC resonance circuit unit, a high-voltage collision type fast vacuum contactor, a high-voltage charging unit, a main controller and a feed-through current transformer;
the upper end interface of the rapid vacuum circuit breaker is respectively and electrically connected with the negative electrode of the capacitor of the LC resonance circuit unit and the negative electrode end of the output end of the high-voltage charging unit, and the lower end interface of the rapid vacuum circuit breaker is electrically connected with the lower outlet port of the high-voltage collision type rapid vacuum contactor;
the positive electrode of the capacitor of the LC resonance circuit unit is respectively and electrically connected with the positive electrode end of the output end of the high-voltage charging unit and one end of the inductor of the LC resonance circuit unit, and the other port of the inductor of the LC resonance circuit unit is connected with the upper wiring port of the high-voltage collision type rapid vacuum contactor;
the center of a primary high-voltage winding of the straight-through current transformer is penetrated by a lower outgoing lead of the rapid vacuum circuit breaker;
the output of the main controller is connected to the quick vacuum circuit breaker and the high-voltage collision type quick vacuum contactor, and the input of the main controller is connected to a secondary output interface of the straight-through current transformer.
2. A high capacity fast switching device according to claim 1, wherein the high voltage impact type fast vacuum contactor employs an eddy current repulsion fast closing impact type mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110943364.3A CN113764226A (en) | 2021-08-17 | 2021-08-17 | High-capacity quick switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110943364.3A CN113764226A (en) | 2021-08-17 | 2021-08-17 | High-capacity quick switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113764226A true CN113764226A (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110943364.3A Pending CN113764226A (en) | 2021-08-17 | 2021-08-17 | High-capacity quick switching device |
Country Status (1)
| Country | Link |
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| CN (1) | CN113764226A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317300A (en) * | 2017-08-02 | 2017-11-03 | 国家电网公司 | Intelligent auto recloser |
| CN108461365A (en) * | 2018-01-31 | 2018-08-28 | 西安交通大学 | The artificial zero passage high voltage DC breaker of compact and its cutoff method |
| CN110349793A (en) * | 2018-08-09 | 2019-10-18 | 安徽合凯电气科技股份有限公司 | One kind being switched fast switching device, system and application |
| CN112447440A (en) * | 2020-11-10 | 2021-03-05 | 安徽合凯电气科技股份有限公司 | Medium-voltage zero-crossing control module |
-
2021
- 2021-08-17 CN CN202110943364.3A patent/CN113764226A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317300A (en) * | 2017-08-02 | 2017-11-03 | 国家电网公司 | Intelligent auto recloser |
| CN108461365A (en) * | 2018-01-31 | 2018-08-28 | 西安交通大学 | The artificial zero passage high voltage DC breaker of compact and its cutoff method |
| CN110349793A (en) * | 2018-08-09 | 2019-10-18 | 安徽合凯电气科技股份有限公司 | One kind being switched fast switching device, system and application |
| CN112447440A (en) * | 2020-11-10 | 2021-03-05 | 安徽合凯电气科技股份有限公司 | Medium-voltage zero-crossing control module |
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