CN101557093B - Small voltaic arc large current DC switch - Google Patents
Small voltaic arc large current DC switch Download PDFInfo
- Publication number
- CN101557093B CN101557093B CN2009100425744A CN200910042574A CN101557093B CN 101557093 B CN101557093 B CN 101557093B CN 2009100425744 A CN2009100425744 A CN 2009100425744A CN 200910042574 A CN200910042574 A CN 200910042574A CN 101557093 B CN101557093 B CN 101557093B
- Authority
- CN
- China
- Prior art keywords
- switch
- current
- voltage
- transformer
- power supply
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 238000004804 winding Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 3
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 8
- 230000006378 damage Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Abstract
The invention discloses a small voltaic arc large current DC switch. The switch comprises an AC power supply, a voltage and frequency regulating device, a voltage transformer, a DC switch contact terminal, a capacitor and a load. The AC power supply is connected with one end of the voltage and frequency regulating device, the other end of the voltage and frequency regulating device is connected with the output winding of the voltage transformer, the DC switch is serially connected with the input winding of the voltage transformer, then parallelly connected with the capacitor, and then seriallyconnected between the AC power supply and the load. When the DC switch is cut off under a heavy fault current working condition, the DC switch contact terminal is overlapped with alternating-current of corresponding magnitude to create an artificial zero crossing point, the characteristic of small negative semi-wave amplitude of the overlapped current is used to trigger the switch to work, thus effectively inhibiting the generation of voltaic arc and prolonging the service life of the switch.
Description
Technical field
The present invention relates to a kind of dc switch, particularly a kind of small voltaic arc large current DC switch.
Background technology
There is a general problem in heavy DC switch cubicle in the existing electric power supply system for subway, and the electric arc that promptly produces during fault trip has a strong impact on the useful life of switch cubicle.External product generally is that twice back of fault tripping operation just must be changed, and home products only can bear once tripping operation.Behind the dc switch fault trip, switch itself just must be changed by electrical arc erosion, and the replacing of dc switch directly influences the normal operation of subway.Domestic subway is repeatedly stopped transport, has been produced very big economic loss and social influence owing to the damage of heavy DC switch causes the subway section not supply power.The technical problem of existing heavy DC switch cubicle most critical is the problem that how to solve direct-current arc.Because during the action of the direct-current switch cabinet in the rail of city the separating brake of carrying is arranged all, operating current is very big, and direct current can not utilize current zero-crossing point to come arc extinguishing as interchange, so the destruction that electric arc produces during separating brake is very big.
Summary of the invention
Heavy DC switch recycling rate of waterused is low in existing subway and the light rail systems, involving great expense causes the technical problem of city rail fluctuation of service in order to solve, and the present invention provides a kind of small voltaic arc large current DC switch.The present invention can not only increase the number of times of heavy DC switch fault tripping operation back recycling, can also reduce the production cost greatly, guarantees city rail system safety stable operation, practices thrift the operation cost of relevant enterprise.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: comprise AC power, voltage regulation and frequency modulation device, transformer, dc switch contact, electric capacity, load; One end of AC power and voltage regulation and frequency modulation device joins; The output winding of the other end of voltage regulation and frequency modulation device and transformer joins; Dc switch is connected in series parallelly connected with electric capacity with the input winding of transformer again; Be serially connected with again between DC power supply and the load; Electric capacity and transformer form series resonance, and promptly
C is an electric capacity, and L is the reactance of transformer secondary output winding.
The technique effect of patent of the present invention is: after the present invention adopts the direct current fault current of the dc switch of will flowing through to be added on the resonance current, make up lifting of resonance current, thereby positive half wave is very big; Negative half-wave is very little; Like this, just produced artificial zero crossing, the proper timing in the negative half-wave of electric current triggers dc switch makes it disjunction; Make that the electric arc that produces is very little; Avoid infringement, eliminate the destruction of electric arc basically, thereby prolong the useful life of heavy DC switch switch contact to switch contact.
Below in conjunction with accompanying drawing patent of the present invention is further specified.
Description of drawings
Fig. 1 is a structure chart of the present invention.
Fig. 2 is the ac/ac frequency converter that the tuning modulation device adopts among the present invention.
Fig. 3 (a) is independent direct current fault current, (b) is the stack of artificial alternating current and direct current fault current.
Embodiment
Referring to Fig. 1, the present invention includes AC power 1, DC power supply 2, dc switch contact 3, voltage regulation and frequency modulation device 4, transformer 5, electric capacity 6, load 7.One end of AC power 1 and voltage regulation and frequency modulation device 4 joins, and the output winding of the other end of voltage regulation and frequency modulation device 4 and transformer 5 joins, and it is parallelly connected with electric capacity 6 that dc switch 3 and the input winding of transformer 5 are connected in series again, is serially connected with between DC power supply 2 and the load 7 again.
When supporting protection system is measured the immediate current of the dc switch of flowing through when fault (for example load short circuits) takes place; The voltage regulation and frequency modulation device produces the alternating voltage of respective magnitudes fast; This voltage is added in the loop that the reactance on dc switch, electric capacity and transformer time limit forms, if capacitor C and reactance L when angular frequency satisfied
then in this loop, will form series resonance.
Shown in Fig. 3 (b), after the direct current fault current of the dc switch of flowing through is added on this resonance current, make up lifting of resonance current, thereby positive half wave is very big, negative half-wave is very little, like this, has just produced artificial zero crossing.Proper timing in the negative half-wave of electric current triggers dc switch makes it disjunction, makes that the electric arc that produces is very little, avoids the infringement to switch contact.Through selecting suitable ac power frequency, the sensitivity action of cooperative mechanical switch can be controlled at electric arc in the very desirable scope.This scheme combines traditional arc extinguishing technology, can electric arc be controlled in the very little scope, eliminates the destruction of electric arc to switch contact basically, thereby prolongs the useful life of heavy DC switch.
Claims (1)
1. small voltaic arc large current DC switch; It is characterized in that: comprise AC power, voltage regulation and frequency modulation device, transformer, dc switch contact, electric capacity, load; One end of AC power and voltage regulation and frequency modulation device joins; The output winding of the other end of voltage regulation and frequency modulation device and transformer joins; It is parallelly connected with electric capacity that dc switch and the input winding of transformer are connected in series again, is serially connected with between DC power supply and the load again, and electric capacity and transformer secondary output winding form series resonance; Promptly
C is an electric capacity, and L is the reactance of transformer secondary output winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100425744A CN101557093B (en) | 2009-01-21 | 2009-01-21 | Small voltaic arc large current DC switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100425744A CN101557093B (en) | 2009-01-21 | 2009-01-21 | Small voltaic arc large current DC switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101557093A CN101557093A (en) | 2009-10-14 |
| CN101557093B true CN101557093B (en) | 2012-05-09 |
Family
ID=41175091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100425744A Expired - Fee Related CN101557093B (en) | 2009-01-21 | 2009-01-21 | Small voltaic arc large current DC switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101557093B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102655319B (en) * | 2012-04-26 | 2014-11-12 | 华中科技大学 | Direct-current circuit breaker capable of reducing forward superimposed current |
| CN103117196B (en) * | 2013-01-17 | 2015-11-04 | 国网智能电网研究院 | One seals in coupling inductance high voltage DC breaker and control method thereof |
| CN103487732B (en) * | 2013-09-24 | 2015-11-04 | 许继集团有限公司 | Alterating and direct current compression testing device and method between the valve end of modular multilevel converter valve |
| CN104464464A (en) * | 2014-12-15 | 2015-03-25 | 广东电网有限责任公司电力科学研究院 | Arc generation device working on basis of parallel resonance mode |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2802813Y (en) * | 2005-05-27 | 2006-08-02 | 王川 | Series compensation type non-consumption current-limiting reactor |
| CN101164212A (en) * | 2005-05-06 | 2008-04-16 | 埃伦贝格尔及珀恩斯根有限公司 | Circuit breaker system |
-
2009
- 2009-01-21 CN CN2009100425744A patent/CN101557093B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164212A (en) * | 2005-05-06 | 2008-04-16 | 埃伦贝格尔及珀恩斯根有限公司 | Circuit breaker system |
| CN2802813Y (en) * | 2005-05-27 | 2006-08-02 | 王川 | Series compensation type non-consumption current-limiting reactor |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2008-235056A 2008.10.02 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101557093A (en) | 2009-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101521374B (en) | Short-circuit current limiting device of magnetic saturation reactor | |
| CN104579070B (en) | Contactless on-load automatic regulating distribution transformer and the method for carrying out automatic Regulation | |
| WO2012062929A3 (en) | Power inverter for feeding electric energy from a dc power generator into an ac grid with two power lines | |
| CN101557093B (en) | Small voltaic arc large current DC switch | |
| CN104038124B (en) | Exciter control system based on double Exciting Windings for Transverse Differential Protection | |
| CN104104143A (en) | Parallel-connected quiescent voltage restorer for isolating transient voltage fault of power system | |
| CN203660492U (en) | Microcomputer comprehensive protection device having active/passive automatic switching function | |
| CN105375634A (en) | Monitoring system of high voltage switch cabinet | |
| KR20170026695A (en) | Hybrid energy storage system | |
| CN202749184U (en) | Pre-magnetizing device for transformer of high-power wind power complete machine test bench | |
| CN101951018A (en) | Emergency supply with photovoltaic synchronization feeding function | |
| CN106602598B (en) | A kind of intelligent power supply system of the accessory power supply of grid-connection device | |
| CN217406243U (en) | Middle-high voltage direct-hanging device and power supply switching circuit thereof | |
| CN201663041U (en) | High-impedance transformer for solar power generation | |
| CN110365101B (en) | Electric energy quality treatment device | |
| CN204615638U (en) | A kind of the soft of high-voltage cascade frequency converter opens circuit | |
| CN204258326U (en) | A kind of photovoltaic generating system | |
| CN201766406U (en) | AC/DC hot standby power supply source | |
| CN203522530U (en) | Contactor power supply circuit of grid-connected inversion circuit | |
| CN203817592U (en) | Inverter welder circuit powered by generator | |
| CN201174578Y (en) | Energy storage circuit break self-cutting leakage protection switch | |
| CN204118710U (en) | Power distribution cabinet safety protective circuit | |
| CN203135453U (en) | Self-commutation reactive power compensator based on current source converter | |
| CN201946985U (en) | 10 kV power system intelligence dynamic reactive power compensation switch device | |
| CN102957130B (en) | A kind of tandem type field circuit breaker demagnetization circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID HUNAN ELECTRIC POWER COMPANY HUNAN HUAD Effective date: 20140108 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Luo Longfu Inventor after: Ma Fang Inventor after: Zhang Zhiwen Inventor after: Xiong Zhiyao Inventor after: Xu Jiazhu Inventor after: Li Yong Inventor after: Dong Shuda Inventor after: Zhou Hongyu Inventor after: Chen Yuehui Inventor after: Zhou Guandong Inventor before: Luo Longfu Inventor before: Zhang Zhiwen Inventor before: Xiong Zhiyao Inventor before: Xu Jiazhu Inventor before: Li Yong Inventor before: Dong Shuda Inventor before: Zhou Hongyu |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LUO LONGFU ZHANG ZHIWEN XIONG ZHIYAO XU JIAZHU LI YONG DONG SHUDA ZHOU HONGYU TO: LUO LONGFU ZHANG ZHIWEN XIONG ZHIYAO XU JIAZHU LI YONG DONG SHUDA ZHOU HONGYU CHEN YUEHUI ZHOU GUANDONG MA FANG |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140108 Address after: Yuelu District City, Hunan province 410082 Changsha Lushan Road No. 2 Patentee after: Hunan University Patentee after: State Grid Hunan Electric Power Company Patentee after: Hunan Huada Electrician Hi-Tech Co., Ltd. Address before: Yuelu District City, Hunan province 410082 Changsha Lushan Road No. 2 Patentee before: Hunan University |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20200121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |