CN106786472A - A kind of digital arc extinction cabinet - Google Patents
A kind of digital arc extinction cabinet Download PDFInfo
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- CN106786472A CN106786472A CN201510834117.4A CN201510834117A CN106786472A CN 106786472 A CN106786472 A CN 106786472A CN 201510834117 A CN201510834117 A CN 201510834117A CN 106786472 A CN106786472 A CN 106786472A
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- arc
- digital
- suppressing controller
- extinction cabinet
- voltage
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Abstract
The present invention provides a kind of digital arc extinction cabinet, including：Housing, it is arranged on the arc-suppressing controller of enclosure interior, detection means and control protective unit, the detection means includes being arranged on voltage transformer summation current transformer, the control protective unit includes door electromagnetic lock, disconnecting link electromagnetic lock, isolation switch, high breaking high-tension fuse, overvoltage protection device, high-voltage and current-limitation fuse and vacuum contactor, the output end connection arc-suppressing controller of the voltage transformer summation current transformer, the output end connection control protective unit of the arc-suppressing controller, RS495 interfaces are set on the arc-suppressing controller, the extinguishing arc control sets a harmonic elimination and secondary microcomputer harmonic elimination device.Digital arc extinction cabinet quick action of the present invention, can immediately extinguish electric arc, and can effectively limit arc grounding over-voltage.
Description
Technical field
The present invention relates to overvoltage crowbar protection field, and in particular to a kind of digital arc extinction cabinet.
Background technology
The method of operation of isolated neutral is used mostly in the distribution system of 3~35kV, when there is earth fault, it is allowed to continue to run with two hours, such as ratify through higher level relevant department, can also extend.But code is clearly defined for the concept of " singlephase earth fault ", if singlephase earth fault is metallic earthing, faulted phase voltage is reduced to zero, the voltage-to-ground of remaining two-phase will raise to line voltage UL, thus the insulation against ground level of electrical equipment such as transformer, voltage/current transformer, breaker and cable etc. of this kind of power network, can meet the long-term requirement for bearing line voltage effect without damage.But, if singlephase earth fault is arc grounding, the earth current of general 3~10KV power networks is more than 30A, the earth current of 35KV power networks is more than 10A, electric arc is just difficult to extinguish, cause the transient change of operation of power networks state, cause electromagnetic energy saturation, produce ferromagnetic resonance, and cause perfect phase voltage raise, its overvoltage is generally 3.15~3.5 times of phase voltage, here it is arc overvoltage and ferro-resonance over-voltage, the reliability of this safe operation and power supply to power system makes a big impact, very harmful.
The content of the invention
A kind of problem that the present invention exists for above-mentioned prior art, it is proposed that digital arc extinction cabinet.
The present invention provide technical scheme be：A kind of digital arc extinction cabinet, including：Housing, it is arranged on the arc-suppressing controller of enclosure interior, detection means and control protective unit, the detection means includes being arranged on voltage transformer summation current transformer, the control protective unit includes door electromagnetic lock, disconnecting link electromagnetic lock, isolation switch, high breaking high-tension fuse, overvoltage protection device, high-voltage and current-limitation fuse and vacuum contactor, the output end connection arc-suppressing controller of the voltage transformer summation current transformer, the output end connection control protective unit of the arc-suppressing controller, RS495 interfaces are set on the arc-suppressing controller, the extinguishing arc control sets a harmonic elimination and secondary microcomputer harmonic elimination device.
Further, the housing also includes impact protector mechanism.
Further, observation window is set on the housing.
Further, the hull outside sets display device, and the output end of the arc-suppressing controller is connected by display driver circuit with the display device.
Further, the display device includes on off state display control device, including powered display, and opening and closing state is indicated, and earthed switch is indicated, and energy storage is indicated, and handcart position is indicated, voice anti-fault prompting, and humiture numerical value shows.
Beneficial effects of the present invention are：Digital arc extinction cabinet quick action, rapidity can be acted in 30ms, greatly shorten the duration of single-phase earthing electric arc, can immediately extinguish electric arc after digital arc extinction cabinet action, and can effectively limit arc grounding over-voltage.Allow capacitance current continue through at least more than 2 hours, user can complete transfer load switch operation after handling failure circuit；The defencive function of digital arc extinction cabinet not by power network scale and the method for operation influenceed.
Brief description of the drawings
Fig. 1 is a kind of digital arc extinction cabinet overall structure block diagram proposed by the present invention；
Fig. 2 is a kind of digital arc extinction cabinet cut-away view proposed by the present invention.
Specific embodiment
The present invention is described further below in conjunction with accompanying drawing.
Referring to Fig. 1 and Fig. 2, wherein Fig. 1 is a kind of digital arc extinction cabinet overall structure block diagram proposed by the present invention；Fig. 2 is a kind of digital arc extinction cabinet cut-away view proposed by the present invention.
As depicted in figs. 1 and 2, a kind of digital arc extinction cabinet, including：Housing 1, it is arranged on the arc-suppressing controller 2 of enclosure interior, detection means 3 and control protective unit 4, the detection means 3 includes being arranged on the summation current transformer 32 of voltage transformer 31, the control protective unit 4 includes door electromagnetic lock 41, disconnecting link electromagnetic lock 42, isolation switch 43, high breaking high-tension fuse 44, overvoltage protection device 45, high-voltage and current-limitation fuse 46 and vacuum contactor 47, the output end connection arc-suppressing controller 2 of the summation current transformer 32 of the voltage transformer 31, the output end connection control protective unit 4 of the arc-suppressing controller 2, RS495 interfaces 5 are set on the arc-suppressing controller 2, the extinguishing arc control 2 sets a harmonic elimination and secondary microcomputer harmonic elimination device 6.
Further, the housing 1 also includes impact protector mechanism 7.
Further, observation window 8 is set on the housing 1.
Further, the outside of the housing 1 sets display device 9, and the output end of the arc-suppressing controller 2 is connected by display driver circuit with the display device 9.
Further, the display device 9 includes on off state display control device, including powered display, and opening and closing state is indicated, and earthed switch is indicated, and energy storage is indicated, and handcart position is indicated, voice anti-fault prompting, and humiture numerical value shows.
In the embodiment of the present invention, when system occurs single-phase arc grounding failure, digital arc extinction cabinet can put into the vacuum contactor of failure phase in 30ms, and faulted phase voltage drops to zero, and the electric arc of trouble point extinguishes therewith, and digital arc extinction cabinet sends actuating signal.
Such as it is used for overhead transmission line, can sets and be disconnected automatically through 4-5s vacuum contactors, be such as transient fault, then system recovers normal operation, be such as permanent fault, vacuum contactor puts into and no longer disconnect, plays a part of forever to limit voltage again.
After system failure circuit cuts off, manually need to control to make digital arc extinction cabinet recover normal condition automatically by SR or a distant place.
When after the digital arc extinction cabinet action caused due to a variety of causes by digital arc extinction cabinet two-phase grounding fault, high-voltage and current-limitation fuse quickly cuts off the earth point in digital arc extinction cabinet in 1-2ms, prevent the consequence of line to line fault, do not interfere with system and normally run.
Voltage transformer in digital arc extinction cabinet can provide secondary voltage signal to other indicating meters and protective relaying device etc., and digital arc extinction cabinet is configured with RS485 interfaces, can realize data remote by bus.Digital arc extinction cabinet can record 20 times of event of failure generation, device action state and related accidents parameter.Digital arc extinction cabinet also sets up a harmonic elimination and secondary microcomputer harmonic elimination device, to limit resonance overvoltage.
Digital arc extinction cabinet can install the line selection device for low current based on maximal increment method principle of the special design of our company additional, realize automatic route selection function, with before and after arc extinction, only faulty line zero-sequence current changes maximum principle come failure judgement circuit, can overcome the shortcomings of that conventional line selection apparatus are present, route selection accuracy rate when making arc grounding is greatly improved.
The present invention is described in detail above, but the invention is not restricted to above-mentioned implementation method, in the ken that those of ordinary skill in the art possess, can also be made a variety of changes on the premise of present inventive concept is not departed from.Not departing from the spirit and scope of the present invention can make many other changes and remodeling.It should be appreciated that the invention is not restricted to specific implementation method, the scope of the present invention is defined by the following claims.
Claims (5)
1. a kind of digital arc extinction cabinet, it is characterised in that including：Housing（1）, it is arranged on the arc-suppressing controller of enclosure interior（2）, detection means（3）And control protective unit（4）, the detection means（3）Including being arranged on voltage transformer（31）Summation current transformer（32）, the control protective unit（4）Including door electromagnetic lock（41）, disconnecting link electromagnetic lock（42）, isolation switch（43）, high breaking high-tension fuse（44）, overvoltage protection device（45）, high-voltage and current-limitation fuse（46）And vacuum contactor（47）, the voltage transformer（31）Summation current transformer（32）Output end connection arc-suppressing controller（2）, the arc-suppressing controller（2）Output end connection control protective unit（4）, the arc-suppressing controller（2）Upper setting RS495 interfaces（5）, the arc-suppressing controller（2）Harmonic elimination and secondary microcomputer harmonic elimination device are set（6）.
2. a kind of digital arc extinction cabinet according to claim 1, it is characterised in that：The housing（1）Also include impact protector mechanism（7）.
3. a kind of digital arc extinction cabinet according to claim 1, it is characterised in that：The housing（1）Upper setting observation window（8）.
4. a kind of digital arc extinction cabinet according to claim 1, it is characterised in that：The housing（1）Outside sets display device（9）, the arc-suppressing controller（2）Output end pass through display driver circuit and the display device（9）Connection.
5. a kind of digital arc extinction cabinet according to claim 1, it is characterised in that：The display device（9）Including on off state display control device, including powered display, opening and closing state is indicated, and earthed switch is indicated, and energy storage is indicated, and handcart position is indicated, voice anti-fault prompting, and humiture numerical value shows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510834117.4A CN106786472A (en) | 2015-11-24 | 2015-11-24 | A kind of digital arc extinction cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510834117.4A CN106786472A (en) | 2015-11-24 | 2015-11-24 | A kind of digital arc extinction cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106786472A true CN106786472A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510834117.4A Pending CN106786472A (en) | 2015-11-24 | 2015-11-24 | A kind of digital arc extinction cabinet |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2808688A1 (en) * | 2005-02-21 | 2014-12-03 | Adaptive Regelsysteme Gesellschaft mbH | Method for determining a parameter of an electrical network |
| CN204089006U (en) * | 2014-09-21 | 2015-01-07 | 安徽海美特电力设备有限公司 | A kind of novel switched arc extinction cabinet |
| CN204156351U (en) * | 2014-12-18 | 2015-02-11 | 江苏华通电气科技有限公司 | A kind of arc-extinguishing harmonic-eliminating equipment |
| CN204333950U (en) * | 2014-12-22 | 2015-05-13 | 安徽凯川电力保护设备有限公司 | A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment |
| US20150318693A1 (en) * | 2014-04-30 | 2015-11-05 | John Richard Archer | Coil with Shunt Impedance for Arc Suppression using an Alternating Current Power Source or a Direct Current Power Source |
| CN204794071U (en) * | 2015-08-01 | 2015-11-18 | 安徽彼德森电气设备有限公司 | Digital arc extinction cabinet |
-
2015
- 2015-11-24 CN CN201510834117.4A patent/CN106786472A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2808688A1 (en) * | 2005-02-21 | 2014-12-03 | Adaptive Regelsysteme Gesellschaft mbH | Method for determining a parameter of an electrical network |
| US20150318693A1 (en) * | 2014-04-30 | 2015-11-05 | John Richard Archer | Coil with Shunt Impedance for Arc Suppression using an Alternating Current Power Source or a Direct Current Power Source |
| CN204089006U (en) * | 2014-09-21 | 2015-01-07 | 安徽海美特电力设备有限公司 | A kind of novel switched arc extinction cabinet |
| CN204156351U (en) * | 2014-12-18 | 2015-02-11 | 江苏华通电气科技有限公司 | A kind of arc-extinguishing harmonic-eliminating equipment |
| CN204333950U (en) * | 2014-12-22 | 2015-05-13 | 安徽凯川电力保护设备有限公司 | A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment |
| CN204794071U (en) * | 2015-08-01 | 2015-11-18 | 安徽彼德森电气设备有限公司 | Digital arc extinction cabinet |
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Application publication date: 20170531 |
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| WD01 | Invention patent application deemed withdrawn after publication |