CN108448561A - It is a kind of to prevent two differently short-circuit high-speed switch arc-extinction devices - Google Patents
It is a kind of to prevent two differently short-circuit high-speed switch arc-extinction devices Download PDFInfo
- Publication number
- CN108448561A CN108448561A CN201810157310.2A CN201810157310A CN108448561A CN 108448561 A CN108448561 A CN 108448561A CN 201810157310 A CN201810157310 A CN 201810157310A CN 108448561 A CN108448561 A CN 108448561A
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- CN
- China
- Prior art keywords
- switch
- way
- arc
- control device
- extinguishing arc
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
Abstract
The present invention, which provides, a kind of preventing two differently short-circuit high-speed switch arc-extinction devices; it is related to electrical equipment technical field; including extinguishing arc selector control device, Quick eddy driving switch, anti-interference type high-precision power, zero sequence current mutual inductor; tetra- tunnels zero sequence current mutual inductor series connection Quick eddy driving switch Hou Fen; it is grounded after capacitance, electrification display all the way; all the way ground is followed by through overvoltage protection device; it is grounded after high-tension fuse, voltage transformer, a resonance eliminator all the way, is connected to isolation switch all the way；The beneficial effects of the invention are as follows：Invention is in such a way that high-speed switch substitutes vacuum contactor string resistance, and structure is simpler, and connecting-disconnecting function is stronger, and the divide-shut brake speed of high-speed switch is faster than vacuum contactor.
Description
Technical field
The present invention relates to electrical equipment technical fields, and in particular to a kind of to prevent two differently short-circuit high-speed switch extinguishing arcs
Device.
Background technology
Country's low voltage electric network largely uses central point isolated neutral system, this mode power grid to allow band single-phase earthing at present
Failure operation 2 hours has higher reliability.But with the universal and development of city cable circuit, singlephase earth fault
Electric arc develops into two differently short-circuit to the long-term damage of cable solid insulation, is unable to maintain that 2h is run.Singlephase earth fault
Afterwards, failure is mutually grounded rapidly, extinguishes electric arc by rapid closing.Generally on the market using contactor increase resistance combination come
Eliminate two differently short troubles, when normal operation, contactor separating brake, after singlephase earth fault occurs for system, controller is rapid
The reclosing command of contactor is sent out, contactor closes a floodgate rapidly, extinguishes electric arc.After system single-phase earth fault, system other one
After singlephase earth fault mutually occurs, formed it is two differently short-circuit, since the connecting-disconnecting function of contactor is limited, using with contactor string
The resistance current limliting of connection, the differently short-circuit short circuit current of limitation two, is dividing vacuum contactor, completes two and differently short-circuit opens
It is disconnected.Now in such a way that high-speed switch substitutes vacuum contactor power-up resistance, switch compared with contactor, connecting-disconnecting function significantly carries
It is high, it is no longer necessary to which that resistance current limliting, structure is simpler, and the opening time of high-speed switch is in 3ms or so, and closing time is on the left sides 5ms
The right side, the divide-shut brake speed of high-speed switch and the speed of vacuum contactor are similar, or even faster, solve the slow-footed skill of regular tap
Art bottleneck.
Invention content
In view of the deficiencies of the prior art, two differently short-circuit high-speed switch extinguishing arc dresses being prevented the present invention provides a kind of
It sets so that divide-shut brake speed is faster.
In order to achieve the above object, the present invention is achieved by the following technical programs：It is a kind of prevent it is two differently short-circuit
High-speed switch arc-extinction device, including extinguishing arc selector control device, Quick eddy driving switch, anti-interference type high-precision power, zero sequence
Current transformer, tetra- tunnels zero sequence current mutual inductor series connection Quick eddy driving switch Hou Fen, shows through capacitance, electrification all the way
It is grounded after device, is followed by ground through overvoltage protection device all the way, is followed by all the way through high-tension fuse, voltage transformer, a resonance eliminator
Ground is connected to isolation switch all the way.
Preferably, the extinguishing arc selector control device is connected to Quick eddy driving switch, extinguishing arc choosing by optical fiber
Lane controller includes extinguishing arc module and fast line selection module, and the extinguishing arc module quickly extinguishes electric arc for quickly selecting failure
Phase.
Preferably, the fault-line selecting method includes the following steps：
S1. when normal operation, extinguishing arc selector control device monitors system voltage by voltage transformer in real time, and calculates in real time
Go out the virtual value of residual voltage, realizes the acquisition to residual voltage；
S2. single-phase earthing occurs, extinguishing arc selector control device Judging fault phase in 3ms is turned by failure phase zero-sequence current
It moves the front and back maximum principle of variable quantity and selects faulty line, extinguishing arc selector control device sends out separating brake order；
S3. by receiving the order of extinguishing arc selector control device, control separating brake, silicon-controlled conducting of closing a floodgate are realized to quick
It is vortexed the divide-shut brake coil discharge of driving switch, completes the divide-shut brake action of Quick eddy driving switch；
S4. by the feed motion of Quick eddy driving switch, arc-suppressing controller once detects two differently short circuit events
Barrier sends out rapidly the separating brake order of Earth Phase switch, quick acting switching-off in 6ms, avoids two differently short-circuit.
The beneficial effects of the invention are as follows：Invention is in such a way that high-speed switch substitutes vacuum contactor string resistance, and structure is more
Add simply, connecting-disconnecting function is stronger, and the divide-shut brake speed of high-speed switch is faster than vacuum contactor.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the specific fault-line selecting method decision logic figure of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In description of the invention, it should be noted that the orientation of the instructions such as term "vertical", "upper", "lower", "horizontal" or
Person's position relationship is orientation based on ... shown in the drawings or position relationship, is merely for convenience of describing this practicality and simplify to describe,
Rather than instruction either implies that signified device or element must have a particular orientation, with specific azimuth configuration and behaviour
Make, therefore is not considered as limiting the invention.In addition, " first ", " second ", " third ", " the 4th " are only used for description mesh
, and should not be understood as indicating or implying relative importance.
In description of the invention, it is also necessary to explanation, unless otherwise specific regulation and limitation, term " setting ", " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection can be mechanical connection, can also be electrical connection, can be directly connected to, and can also be to be connected by intermediary, can
To be the connection inside two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term in the present invention.
Embodiment 1：
Two differently short-circuit high-speed switch arc-extinction devices are prevented as shown in Figure 1, a kind of, including extinguishing arc selector control device 1,
Quick eddy driving switch 2, anti-interference type high-precision power, zero sequence current mutual inductor 3, the zero sequence current mutual inductor 3 are connected
Tetra- tunnels 2 Hou Fen of Quick eddy driving switch, are grounded after capacitance, electrification display 5, all the way all the way after overvoltage protection device 6
Ground connection, is grounded after 8, high-tension fuse 7, voltage transformer resonance eliminators 9, is connected to isolation switch 4 all the way all the way.
Preferably, the extinguishing arc selector control device 1 is connected to Quick eddy driving switch 2, the extinguishing arc by optical fiber
Selector control device 1 includes extinguishing arc module and fast line selection module, and the extinguishing arc module quickly extinguishes electric arc for quickly selecting event
Hinder phase.
Embodiment 2：
It is a kind of to prevent two differently short-circuit high-speed switch arc-extinction devices, including extinguishing arc selector control device 1, Quick eddy from driving
Dynamic switch 2, anti-interference type high-precision power, zero sequence current mutual inductor 3, the series connection Quick eddy of the zero sequence current mutual inductor 3 drive
Tetra- tunnels 2 Hou Fen of dynamic switch, are grounded after capacitance, electrification display 5, are grounded after overvoltage protection device 6, pass through all the way all the way all the way
It is grounded after 8, high-tension fuse 7, voltage transformer resonance eliminators 9, is connected to isolation switch 4 all the way.
Preferably, the extinguishing arc selector control device 1 is connected to Quick eddy driving switch 2, the extinguishing arc by optical fiber
Selector control device 1 includes extinguishing arc module and fast line selection module, and the extinguishing arc module quickly extinguishes electric arc for quickly selecting event
Hinder phase.
As shown in Figure 2, it is preferable that the fault-line selecting method includes the following steps：
S1. when normal operation, extinguishing arc selector control device 1 monitors system voltage by voltage transformer 8 in real time, and counts in real time
The virtual value of residual voltage is calculated, realizes the acquisition to residual voltage；
S2. single-phase earthing occurs, the Judging fault phase in 3ms of extinguishing arc selector control device 1 is turned by failure phase zero-sequence current
It moves the front and back maximum principle of variable quantity and selects faulty line, extinguishing arc selector control device hair 1 goes out separating brake order；
S3. by receiving the order of extinguishing arc selector control device 1, control separating brake, silicon-controlled conducting of closing a floodgate are realized to quick
It is vortexed the divide-shut brake coil discharge of driving switch 2, completes the divide-shut brake action of Quick eddy driving switch 2；
S4. by the feed motion of Quick eddy driving switch 2, extinguishing arc selector control device 1 once detects two differently
Short trouble sends out rapidly the separating brake order of Earth Phase switch, quick acting switching-off in 6ms, avoids two differently short-circuit.
When systems are functioning properly, residual voltage is acquired, and calculates the virtual value of residual voltage within 3ms.Work as UΔ
＜ setting values continue acquisition and calculate, if UΔ>Setting value, starting current collector acquire electric current I for the first time0i, and send out fast
The combined floodgate order of speed vortex driving switch, rapid closing, controller judge whether that two is differently short-circuit, if it is strange land short circuit event
Barrier, controller send out rapidly the separating brake order of failure phase, complete separating brake, avoid two differently short circuit accidents.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (3)
1. a kind of preventing two differently short-circuit high-speed switch arc-extinction devices, which is characterized in that including extinguishing arc selector control device, fast
Speed vortex driving switch, anti-interference type high-precision power, zero sequence current mutual inductor, the zero sequence current mutual inductor series connection FAST VORTEX
Tetra- tunnels driving switch Hou Fen are flowed, are grounded after capacitance, electrification display all the way, are followed by ground through overvoltage protection device all the way, all the way
It is grounded after high-tension fuse, voltage transformer, a resonance eliminator, is connected to isolation switch all the way.
2. as described in claim 1 prevent two differently short-circuit high-speed switch arc-extinction devices, which is characterized in that the extinguishing arc
Selector control device is connected to Quick eddy driving switch by optical fiber, and the extinguishing arc selector control device includes extinguishing arc module and fast
Fast route selection module, the extinguishing arc module quickly extinguish electric arc for quickly selecting failure phase.
3. as described in claim 1 prevent two differently short-circuit high-speed switch arc-extinction devices, which is characterized in that failure line selection
Method includes the following steps：
S1. when normal operation, extinguishing arc selector control device monitors system voltage by voltage transformer in real time, and calculates zero in real time
The virtual value of sequence voltage realizes the acquisition to residual voltage；
S2. single-phase earthing, extinguishing arc selector control device Judging fault phase in 3ms, before being shifted by failure phase zero-sequence current occurs
The maximum principle of variable quantity selects faulty line afterwards, and extinguishing arc selector control device sends out separating brake order；
S3. by receiving the order of extinguishing arc selector control device, control separating brake, silicon-controlled conducting of closing a floodgate are realized to Quick eddy
The divide-shut brake coil discharge of driving switch completes the divide-shut brake action of high-speed switch；
S4. by the feed motion of high-speed switch, arc-suppressing controller once detects two differently short troubles, sends out connect rapidly
The separating brake order that ground mutually switchs, quick acting switching-off in 6ms avoid two differently short-circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810157310.2A CN108448561A (en) | 2018-02-24 | 2018-02-24 | It is a kind of to prevent two differently short-circuit high-speed switch arc-extinction devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810157310.2A CN108448561A (en) | 2018-02-24 | 2018-02-24 | It is a kind of to prevent two differently short-circuit high-speed switch arc-extinction devices |
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| Publication Number | Publication Date |
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| CN108448561A true CN108448561A (en) | 2018-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810157310.2A Pending CN108448561A (en) | 2018-02-24 | 2018-02-24 | It is a kind of to prevent two differently short-circuit high-speed switch arc-extinction devices |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245302A (en) * | 2018-09-30 | 2019-01-18 | 安徽合凯电气科技股份有限公司 | A kind of switching regulator arc-extinction device control system jamproof system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852693A (en) * | 2014-03-26 | 2014-06-11 | 马善娟 | Judging method of small current grounding line selection system |
| CN104852361A (en) * | 2015-04-20 | 2015-08-19 | 平高集团有限公司 | Power distribution network failure removal accelerating method and relay protection device |
| CN107728004A (en) * | 2017-09-20 | 2018-02-23 | 蔡华春 | Fault-line selecting method and device based on zero-sequence current failure principle of transfer |
-
2018
- 2018-02-24 CN CN201810157310.2A patent/CN108448561A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852693A (en) * | 2014-03-26 | 2014-06-11 | 马善娟 | Judging method of small current grounding line selection system |
| CN104852361A (en) * | 2015-04-20 | 2015-08-19 | 平高集团有限公司 | Power distribution network failure removal accelerating method and relay protection device |
| CN107728004A (en) * | 2017-09-20 | 2018-02-23 | 蔡华春 | Fault-line selecting method and device based on zero-sequence current failure principle of transfer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245302A (en) * | 2018-09-30 | 2019-01-18 | 安徽合凯电气科技股份有限公司 | A kind of switching regulator arc-extinction device control system jamproof system |
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Application publication date: 20180824 |