CN104022498A - Device for arc discharging protecting in switch cabinet - Google Patents
Device for arc discharging protecting in switch cabinet Download PDFInfo
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- CN104022498A CN104022498A CN201410255320.1A CN201410255320A CN104022498A CN 104022498 A CN104022498 A CN 104022498A CN 201410255320 A CN201410255320 A CN 201410255320A CN 104022498 A CN104022498 A CN 104022498A
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- switch
- arc
- arc discharge
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- breaker
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Abstract
The invention discloses a device for arc discharging protecting in a switch cabinet. The device comprises a breaker, a bus current transformer and a super-high-speed grounding switch which are arranged on a bus in the switch cabinet in sequence. The super-high-speed grounding switch is connected to the ground. The super-high-speed grounding switch and the breaker are connected with a controller together. The controller is connected with a discharging detecting device. According to the device for arc discharging protecting in the switch cabinet, the super-high-speed grounding switch with closing time shorter than 20 milliseconds is used for closing, fault arc current is transferred, the switch is connected to the ground, so that an arc is extinguished, then the super-high-speed grounding switch is controlled to complete opening in 300 milliseconds after breaker tripping so that the breaker can complete normal reclosing operation in 300 milliseconds after tripping, accordingly, under the situation the breaker reclosing function setting and control loop wire connecting do not need to be changed, the problem of the arc discharging fault in the switch cabinet is solved, and the power supply stability of a transformer substation is achieved.
Description
Technical field
The invention belongs to electric system protection device technical field, be specifically related to a kind of device for arc discharge protection in switch cubicle.
Background technology
Supper-fast earthed switch is in a kind of electric power system, the switch of energy quick crowbar and tolerance rated short circuit current.And the automatic reclosing function of circuit breaker is in the time having fault to occur, circuit breaker can again close a floodgate in 300 milliseconds after tripping operation, to realize the power supply again automatically in loop.
In existing switch cubicle, mainly contain two kinds of forms: 1) do not equip supper-fast earthed switch, in the time breaking down electric arc, arcing time is very long, cause cabinet internal pressure to increase, so easily cause the switch cubicle accident of blasting, the harm operation of switch cubicle and staff's personal safety; 2) equipped disposable/muptiple-use supper-fast earthed switch, although can solve the arc discharge failure problems of switch cubicle, but because this supper-fast earthed switch can not separating brake or quick acting switching-off, make the long-time ground connection of bus, therefore cause the automatic reclosing function of whole switch cubicle not use, thereby affected the power supply reliability of whole switch cubicle and this transformer station.
In above two kinds of situations, the automatic reclosing function of switch cubicle all can not be realized.To the 1st kind, although circuit breaker has carried out reclosing operation, after cabinet blast, all devices all damages, and cannot restore electricity; To the 2nd kind of situation, because supper-fast earthed switch completes ground connection, but keep ground state always, circuit breaker cannot successfully close a floodgate again.
Summary of the invention
The object of the present invention is to provide a kind of device for arc discharge protection in switch cubicle, solved existing switch cubicle the arc discharge protection problem existing and the shortcoming that ensures that power supply reliability is difficult to coexist.
The technical solution adopted in the present invention is: a kind of device for arc discharge protection in switch cubicle; comprise and be set in turn in circuit breaker, busbar current transformer and the supper-fast earthed switch on bus in switch cubicle; supper-fast ground switch earthing; circuit breaker and supper-fast earthed switch are connected with controller jointly, and controller is connected with discharging detection device.
Feature of the present invention is also,
Discharging detection device is arc discharge detection probe.
Arc discharge detection probe is provided with multiple.
The invention has the beneficial effects as follows: a kind of device employing closing time for arc discharge protection in switch cubicle of the present invention is less than the supper-fast earthed switch of 20 milliseconds in the time of switch cubicle generation arc fault, close a floodgate to shift the final ground connection of fault electric arc electric current by operating supper-fast earthed switch, carry out thus effective extinguish arcs, thereby prevent switch cubicle blast; Then control in after circuit breaker trip 300 milliseconds of supper-fast earthed switch and complete sub-switching operation, thereby make circuit breaker trip in latter 300 milliseconds and to complete normal reclosing operation at it, so both solve arc fault, improved again the power supply reliability of switch cubicle.
Brief description of the drawings
Fig. 1 is a kind of structural representation for the device of arc discharge protection in switch cubicle of the present invention.
In figure, 1. bus, 2. circuit breaker, 3. busbar current transformer, 4. supper-fast earthed switch, 5. controller, 6. arc discharge detection probe.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
A kind of structure for the device of arc discharge protection in switch cubicle provided by the invention as shown in Figure 1; comprise and be set in turn in circuit breaker 2, busbar current transformer 3 and the supper-fast earthed switch 4 on bus 1 in switch cubicle; supper-fast earthed switch 4 ground connection; circuit breaker 2 and supper-fast earthed switch 4 are connected with controller 5 jointly, and controller 5 is connected with discharging detection device.
Example, busbar current transformer 3 can be analog, can be also digital.
Example, supper-fast earthed switch 4 can be operated by permanent-magnet operating mechanism, spring mechanism operates or hydraulic mechanism operates.
Discharging detection device is arc discharge detection probe 6.
Arc discharge detection probe 6 is provided with multiple.Higher in order to detect the sensitivity of arc discharge, the arc discharge detection probe 6 connecting on controller 5 is arranged multiple, as long as and have an arc discharge detection probe 6 to detect that arc discharge just can send to controller by this signal.
When of the present invention a kind of for switch cubicle in the device of arc discharge protection this signal is sent to controller 5 while having at least an arc discharge detection probe 6 arc discharge to be detected, detect with Time Controller 5 signal that busbar current transformer 3 electric currents increase suddenly, after two conditions all meet, this Time Controller 5 confirms to detect that arc fault occurs; Then controller 5 is controlled supper-fast earthed switch 4 and is closed a floodgate and when carrying out the transfer of arc discharge current earthing, control circuit breaker 2 and trip, wherein, supper-fast earthed switch 4 time of carrying out arc discharge transfer of closing a floodgate is less than 20 milliseconds, the time that this time is less than circuit breaker 2 and completes tripping operation; Finally; in 300 milliseconds after circuit breaker 2 tripping operations, control supper-fast earthed switch 4 by controller 5 and complete separating brake; then make circuit breaker 2 realize automatic reclosing by the automatic reclosing function of circuit breaker 2, complete the arc discharge protection overall process of switch cubicle, make switch cubicle recover normal work.
The present invention is in order to ensure to detect the accuracy of arc fault, setting only has and meets arc discharge detection probe simultaneously and detect that arc discharge and busbar current transformer electric current increase suddenly both of these case and just assert arc fault, has avoided like this situation of misrepresenting deliberately that only relies on a kind of detection mode to exist; Simultaneously, for fear of undetected, be provided with multiple arc discharge detection probe and carry out the detection of multizone arc discharge, as long as the electric current of busbar current transformer also increases suddenly when having an arc discharge detection probe arc discharge to be detected, just regard as arc fault.
The present invention comes thus effectively to extinguish fault electric arc by allowing supper-fast earthed switch close a floodgate to shift fault electric arc current earthing in the time of switch cubicle generation arc fault, thereby prevents switch cubicle blast, guarantee switch cubicle and operations staff's safety.Simultaneously due to the closing time of supper-fast earthed switch short (being less than 20 milliseconds), fault electric arc is little on the impact of switch cubicle built-in electrical insulation, in switch cubicle, insulation recovery is easy, then in after circuit breaker trip 300 milliseconds of the supper-fast earthed switch of controller control, separating brake puts in place, in extinguishing fault electric arc, eliminate the electrical grounding phenomenon in switch cubicle, finally made circuit breaker in 300 milliseconds, to utilize automatic reclosing function to realize automatic reclosing.In the case of not needing to change the reclosing function setting and the wiring of change control loop of circuit breaker, both solve arc discharge failure problems in switch cubicle like this, also solved the power supply reliability problem of transformer station.
Claims (3)
1. the device for arc discharge protection in switch cubicle; it is characterized in that; comprise and be set in turn in circuit breaker (2), busbar current transformer (3) and the supper-fast earthed switch (4) on bus (1) in switch cubicle; described supper-fast earthed switch (4) ground connection; described circuit breaker (2) and supper-fast earthed switch (4) are connected with controller (5) jointly, and described controller (5) is connected with discharging detection device.
2. a kind of device for arc discharge protection in switch cubicle as claimed in claim 1, is characterized in that, described discharging detection device is arc discharge detection probe (6).
3. a kind of device for arc discharge protection in switch cubicle as claimed in claim 2, is characterized in that, described arc discharge detection probe (6) is provided with multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410255320.1A CN104022498A (en) | 2014-06-10 | 2014-06-10 | Device for arc discharging protecting in switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410255320.1A CN104022498A (en) | 2014-06-10 | 2014-06-10 | Device for arc discharging protecting in switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104022498A true CN104022498A (en) | 2014-09-03 |
Family
ID=51439127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410255320.1A Pending CN104022498A (en) | 2014-06-10 | 2014-06-10 | Device for arc discharging protecting in switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104022498A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393577A (en) * | 2014-11-12 | 2015-03-04 | 南京南瑞继保电气有限公司 | Fast arc extinguisher, arc protection system and control method |
| CN104466702A (en) * | 2014-12-01 | 2015-03-25 | 广西电网有限责任公司玉林供电局 | 10kV switch cabinet rapid arc-control device |
| CN109921394A (en) * | 2019-04-15 | 2019-06-21 | 江苏太航信息科技有限公司 | A kind of shipboard automation device with failure removal function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477855A (en) * | 1981-07-10 | 1984-10-16 | Hitachi, Ltd. | Protecting system for transmission lines |
| JPH0449813A (en) * | 1990-06-18 | 1992-02-19 | Nishimu Denshi Kogyo Kk | Automatic control method of switch in high-speed processing host station for fault-point locating and separating system |
| CN1672228A (en) * | 2002-06-14 | 2005-09-21 | 伊顿公司 | Shorting switch and system to eliminate arcing faults in power distribution equipment |
| CN101663803A (en) * | 2007-03-16 | 2010-03-03 | Abb技术有限公司 | Compact secondary substation comprising a fault protection system, a method for fault protection in a compact secondary substation, and a control unit for performing the method |
| CN202276147U (en) * | 2011-10-14 | 2012-06-13 | 安徽一天电气技术有限公司 | Arc extinguishing apparatus for avoiding direct grounding to extinguish arc and reset overvoltage |
| CN203504160U (en) * | 2013-10-22 | 2014-03-26 | 上海交通大学 | Arc protection system |
-
2014
- 2014-06-10 CN CN201410255320.1A patent/CN104022498A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477855A (en) * | 1981-07-10 | 1984-10-16 | Hitachi, Ltd. | Protecting system for transmission lines |
| JPH0449813A (en) * | 1990-06-18 | 1992-02-19 | Nishimu Denshi Kogyo Kk | Automatic control method of switch in high-speed processing host station for fault-point locating and separating system |
| CN1672228A (en) * | 2002-06-14 | 2005-09-21 | 伊顿公司 | Shorting switch and system to eliminate arcing faults in power distribution equipment |
| CN101663803A (en) * | 2007-03-16 | 2010-03-03 | Abb技术有限公司 | Compact secondary substation comprising a fault protection system, a method for fault protection in a compact secondary substation, and a control unit for performing the method |
| CN202276147U (en) * | 2011-10-14 | 2012-06-13 | 安徽一天电气技术有限公司 | Arc extinguishing apparatus for avoiding direct grounding to extinguish arc and reset overvoltage |
| CN203504160U (en) * | 2013-10-22 | 2014-03-26 | 上海交通大学 | Arc protection system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393577A (en) * | 2014-11-12 | 2015-03-04 | 南京南瑞继保电气有限公司 | Fast arc extinguisher, arc protection system and control method |
| CN104466702A (en) * | 2014-12-01 | 2015-03-25 | 广西电网有限责任公司玉林供电局 | 10kV switch cabinet rapid arc-control device |
| CN109921394A (en) * | 2019-04-15 | 2019-06-21 | 江苏太航信息科技有限公司 | A kind of shipboard automation device with failure removal function |
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Application publication date: 20140903 |