CN2490756Y - Crystal break pipe AC high-voltage switch - Google Patents
Crystal break pipe AC high-voltage switch Download PDFInfo
- Publication number
- CN2490756Y CN2490756Y CN 01245408 CN01245408U CN2490756Y CN 2490756 Y CN2490756 Y CN 2490756Y CN 01245408 CN01245408 CN 01245408 CN 01245408 U CN01245408 U CN 01245408U CN 2490756 Y CN2490756 Y CN 2490756Y
- Authority
- CN
- China
- Prior art keywords
- diode
- thyristor
- branch road
- trigger
- branch
- 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
Images
Abstract
The utility model discloses a crystal break pipe AC high-voltage switch which comprises a thyristor connected with an AC circuit in series, and particularly a main thyristor branch (3), a forced inversion branch (4), and an anti-parallel diode branch (2) joining the AC circuit in series and striding between a diode bridge (1) consisting of D1, D2, D3, D4 diodes. The trigger (31) of the main thyristor branch (3) and the trigger (41) of the forced inversion branch (4) are interlocked with each other. The forced inversion branch (4) comprises a capacitance C1 and a charger (42) which are in parallel connection and then are connected in series with an inductance L1 and a thyristor TH2. The charger (42) has the input terminal of a rectification bridge (421) connected with a transformer TR1, the output terminal is connected with both ends of the capacitance C1 through the inductance L1 and a resistor R1, and an anti-parallel diode D10 strides between the two ends of the output terminal. The utility model can be widely used as a compound switch and an overcurrent protection switch in regular electric networks.
Description
One, technical field
The utility model relates to a kind of thyristor and exchanges high-voltage switch gear.
Two, background technology
Overcurrent has very large harm to electric power system, and it can cause line voltage to descend, even mains breakdown; And also very serious to the harm of power equipment such as generator, transformer, motor etc., it can reduce equipment life greatly, even burning apparatus.At present, people often use ordinary tap or various protection switch in order to cut off overcurrent and to realize conventional electrical network switching; They belong to mechanical switch mostly, are made of mechanical action arm and contact.But mechanical switch exists many deficiencies, and at first, it is long to turn-off the required time, and is general all greater than 20 milliseconds; Secondly, have the arcing phenomenon during shutoff, the damage or the inefficacy of switch are caused in the contact of very easily ablating; Once more, produce very strong electromagnetic interference and switching manipulation overvoltage during shutoff; The 4th, the mechanical stress of switch is big, and very strong vibrations and noise are arranged during action, thereby its useful life, reliability short, that turn-off was also low, the maintenance cost height of operation.In order to address this problem, the solid-state switch that the use thyristor is arranged and develop, it is that reverse parallel connection connects a pair of thyristor in ac circuit, utilize the zero-crossing switching characteristic of thyristor to realize the shutoff of solid-state switch, but this also has the long and low deficiency of reliability of turn-off time, and needing 10 milliseconds turn-off time is very disadvantageous for electrical network.
Three, summary of the invention
The technical problems to be solved in the utility model provides a kind of thyristor to exchange high-voltage switch gear for overcoming weak point of the prior art.
The technical scheme that is adopted comprises the thyristor that is connected in series in the ac circuit, the output span that particularly is serially connected with diode bridge in the ac circuit, that be made of diode D1, D2, D3, D4 is connected to main thyristor branch road and forced commutation branch road, and the trigger of the trigger of said main thyristor branch road and said forced commutation branch road is linkage interlocked.As the further improvement of technical scheme, the anode that described main thyristor branch road is thyristor TH1 is connected with the negative pole of diode D1, D2, negative electrode is connected with the positive pole of diode D3, D4, be connected with trigger between gate pole and negative electrode; Described forced commutation branch road is to be connected in series with inductance L 1, thyristor TH2 after capacitor C 1, the charger parallel connection, the negative terminal of charger is connected with the negative pole of diode D1, D2, and the negative electrode of thyristor TH2 is connected with the positive pole of diode D3, D4, be connected with trigger between gate pole and negative electrode; Described charger is that the input termination transformer TR1, output of rectifier bridge connects the two ends of capacitor C 1 through inductance L 2, resistance R 1, and the two ends cross-over connection of said output has anti-and diode D10; The output span of described diode bridge is connected to anti-and diode branch; The negative pole that described anti-also diode branch is diode D5 is connected with the negative pole of diode D1, D2, positive pole is connected with the positive pole of diode D3, D4.
With respect to prior art, owing to be serially connected with in the ac circuit, by diode D1, D2, D3, the output span of the diode bridge that D4 constitutes is connected to main thyristor branch road and forced commutation branch road, and the trigger of the trigger of main thyristor branch road and forced commutation branch road is linkage interlocked, this scheme that combines with the natural zero-crossing shutoff of turn-offing of in diode bridge, will forcing, make that the diode bridge extrinsic current can be two-way, but the thyristor in the bridge is unidirectional all the time, realize the one-way flow of bidirectional current in bridge, thereby in bridge, realize the function of two-way shutoff outside the bridge with the unidirectional thyristor switch, shortened the turn-off time widely, making it only is about 1 millisecond, and when forcing shutoff to lose efficacy, natural zero-crossing turn-offs and begins to work, so have dual turn-off function, has greatly improved the reliability of turn-offing; Again because charger is the input termination transformer TR1 of rectifier bridge, output connects capacitor C 1 through inductance L 2, resistance R 1 two ends, the two ends cross-over connection of output has anti-and diode D10, current reversal loop wherein (being made of resistance R 1, inductance L 2 and diode D10) is after capacitance voltage is reverse, it makes capacitance voltage once more rapidly oppositely, improved the utilance of capacitance energy storage greatly, the charging interval and the capacity of charger have been reduced, and need not control, simple in structure, cheap characteristics are arranged again simultaneously; Again because the output span of diode bridge is connected to anti-and diode branch, both lowered the reverse recovery current when thyristor TH1 forces shutoff greatly, in reversely restoring process, provide lower reverse voltage (about several volts) for thyristor TH1 again, and guarantee the holding time of reverse voltage greater than the turn-off time of thyristor TH1, guarantee the reliable turn-off of thyristor TH1, also reduced the electromagnetic interference and the superpotential possibility of switching manipulation that produce when switch turn-offs simultaneously; The 4th, whole switch also has characteristics such as contactless, that noise is low, control is simple, and circuit topology is simple, reliability is high, and is non-maintaining; The 5th, this switch is equally applicable in the bidirectional, dc pulsation system.
Four, description of drawings
Fig. 1 is a kind of basic structure schematic diagram of the present utility model.
Fig. 2 is a kind of basic electrical schematic diagram of charger among Fig. 1.
Five, embodiment
Below in conjunction with accompanying drawing optimal way of the present utility model is described in further detail.
Electric power system for 3KV, if electric current is 1000A to the maximum, a specific embodiment then of the present utility model can be referring to Fig. 1, Fig. 2, the diode bridge 1 that is connected into by diode D1, D2, D3, D4 (its model is ZP6KV/2KA) is connected in series in the ac circuit, output span at this diode bridge 1 is connected to anti-and diode branch 2, main thyristor branch road 3 and forced commutation branch road 4, and wherein the trigger 31 of main thyristor branch road 3 is linkage interlocked with the trigger 41 of forced commutation branch road 4.Anti-and diode branch 2 is made of diode D5.Main thyristor branch road 3 is made of thyristor TH1 (its model is KP6KV/2KA), trigger 31.Forced commutation branch road 4 is connected in series with inductance L 1, thyristor TH2 (its model is KP6KV/2KA) by charger 42, capacitor C 1 back in parallel, and trigger 41 constitutes; Wherein, charger 42 connects the two ends of capacitor C 1 for the input termination transformer TR1 of the rectifier bridge 421 is made up of diode D6-D9, output through inductance L 2, resistance R 1, and the two ends cross-over connection of output has instead also diode D10.
During use, the charger 42 in the forced commutation branch road 4 gives change of current capacitor C 1 charging; The trigger 31 of thyristor TH1 is sent pulse, triggering and conducting thyristor TH1 with make trigger 41 lockings, the utility model is in conducting state.When ac circuit generation overcurrent, or receive when requiring signal that the utility model turn-offs, the trigger 41 of thyristor TH2 produces pulses, and triggering and conducting thyristor TH2 and make trigger 31 lockings simultaneously makes it forbid sending triggering signal; Energy stored is released by inductance L 1, thyristor TH2, TH1 on the change of current this moment capacitor C 1, forces the electric current on the thyristor TH1 to descend rapidly, until zero passage, enters the reverse recovery stage of thyristor TH1; At this moment anti-and diode D5 begins conducting, thereby has applied an about reverse voltage of about 1 volt at the two ends of thyristor TH1, and the reverse recovery current on thyristor TH1 is then very little; Further decline along with electric current in the concussion loop of capacitor C 1, inductance L 1, diode D5 composition, when electric current during less than ac circuit electric current I L, diode D5 turn-offs, IL only flows through forced commutation branch road 4, because forced commutation branch road 4 is capacitive branch, and its intrinsic concussion frequency is far above power frequency, the decline process of loop current is accelerated greatly, decline zero passage along with electric current, thyristor TH2 also is turned off, thereby ac circuit electric current I L is turned off, and has realized the turn-off function that forces of the present utility model.Turn-off failure even force, ac circuit electric current I L also can be with the frequency decline zero passage of 50HZ, because the triggering signal of thyristor TH1 is closed, so ac circuit electric current I L is by zero-crossing switching.
Claims (6)
1, a kind of thyristor exchanges high-voltage switch gear, comprise the thyristor that is connected in series in the ac circuit, it is characterized in that: the output span that is serially connected with diode bridge (1) in the ac circuit, that be made of diode D1, D2, D3, D4 is connected to main thyristor branch road (3) and forced commutation branch road (4), and the trigger (31) of said main thyristor branch road (3) and the said trigger (41) of change of current branch road (4) that chases after by force are for linkage interlocked.
2, switch according to claim 1 is characterized in that main thyristor branch road (1) is for the anode of thyristor TH1 is connected with the negative pole of diode D1, D2, negative electrode is connected with the positive pole of diode D3, D4, gate pole is connected trigger (31) with negative electrode.
3, switch according to claim 1, it is characterized in that forced commutation branch road (4) is connected in series with inductance L 1, thyristor TH2 for capacitor C 1, charger (42) back in parallel, the negative terminal of charger (42) is connected with the negative pole of diode D1, D2, and the negative electrode of thyristor TH2 is connected with the positive pole of diode D3, D4, gate pole is connected trigger (41) with negative electrode.
4, switch according to claim 3 is characterized in that charger (42) connects the two ends of capacitor C 1 for the input termination transformer TR1 of rectifier bridge (421), output through inductance L 2, resistance R 1, and the two ends cross-over connection of said output has anti-and diode D10.
5, switch according to claim 1 is characterized in that the output span of diode bridge (1) is connected to anti-and diode branch (2).
6, switch according to claim 5 is characterized in that anti-also diode branch (2) is for the negative pole of diode D5 is connected with the negative pole of diode D1, D2, positive pole is connected with the positive pole of diode D3, D4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01245408 CN2490756Y (en) | 2001-08-14 | 2001-08-14 | Crystal break pipe AC high-voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01245408 CN2490756Y (en) | 2001-08-14 | 2001-08-14 | Crystal break pipe AC high-voltage switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2490756Y true CN2490756Y (en) | 2002-05-08 |
Family
ID=33656667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01245408 Expired - Fee Related CN2490756Y (en) | 2001-08-14 | 2001-08-14 | Crystal break pipe AC high-voltage switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2490756Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023312A (en) * | 2012-11-14 | 2013-04-03 | 国网智能电网研究院 | MMC (Modular Multi-level Converter) converter valve submodule device based on thyristor device and controlling method of submodule device |
| CN105140219A (en) * | 2015-09-18 | 2015-12-09 | 中国工程物理研究院电子工程研究所 | Two-way withstand voltage silicon carbide solid-state switch |
| CN112713755A (en) * | 2020-12-04 | 2021-04-27 | 北京星航机电装备有限公司 | Quick turn-off method and system for bidirectional thyristor |
-
2001
- 2001-08-14 CN CN 01245408 patent/CN2490756Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023312A (en) * | 2012-11-14 | 2013-04-03 | 国网智能电网研究院 | MMC (Modular Multi-level Converter) converter valve submodule device based on thyristor device and controlling method of submodule device |
| WO2014075614A1 (en) * | 2012-11-14 | 2014-05-22 | 国家电网公司 | Thyristor-device-based mmc converter valve submodule device and control method thereof |
| CN103023312B (en) * | 2012-11-14 | 2014-12-31 | 国网智能电网研究院 | MMC (Modular Multi-level Converter) converter valve submodule device based on thyristor device and controlling method of submodule device |
| CN105140219A (en) * | 2015-09-18 | 2015-12-09 | 中国工程物理研究院电子工程研究所 | Two-way withstand voltage silicon carbide solid-state switch |
| CN105140219B (en) * | 2015-09-18 | 2018-01-26 | 中国工程物理研究院电子工程研究所 | Two-way pressure resistant silicon carbide solid-state switch |
| CN112713755A (en) * | 2020-12-04 | 2021-04-27 | 北京星航机电装备有限公司 | Quick turn-off method and system for bidirectional thyristor |
| CN112713755B (en) * | 2020-12-04 | 2022-04-19 | 北京星航机电装备有限公司 | Quick turn-off method and system for bidirectional thyristor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107834505B (en) | The artificial zero passage high voltage DC breaker of current-limiting type self-charging type and its cutoff method | |
| CN102348310A (en) | Multi-path LED load power supply circuit | |
| CN1073304C (en) | Two-wire power supply electronic switch | |
| CN201584755U (en) | Current switching-on device for neutral point direct-current blocking equipment of transformer | |
| CN212969451U (en) | Three-level BOOST device | |
| CN2490756Y (en) | Crystal break pipe AC high-voltage switch | |
| CN2577503Y (en) | Over voltage protection device of single-phase bridge inverter for medium voltage frequency transformer | |
| CN111614068A (en) | Bidirectional cut-off current-limiting type hybrid direct current breaker | |
| CN2512162Y (en) | Thyristor high voltage A.C. switch | |
| CN2602543Y (en) | Soft switch circuit without depletion absorption | |
| CN115549028A (en) | Series hybrid circuit breaker based on double-coupling inductor | |
| CN115498609A (en) | Quick transfer switch | |
| CN114583936A (en) | Circuit protection method based on direct current bus capacitor and vehicle-mounted controller control system | |
| CN203135819U (en) | Auxiliary turn-off device for thyristor | |
| CN2604828Y (en) | Delay switch | |
| CN217720717U (en) | Circuit for reducing power-on impact current | |
| CN2457725Y (en) | DC controller of AC contactor | |
| CN103441699B (en) | A kind of high-power semiconductor opening switch | |
| CN105743370B (en) | A kind of superconducting energy storage current transformer and its modulation system | |
| CN219351290U (en) | Quasi Z source unified power flow controller with current limiting protection | |
| CN2393301Y (en) | Electronic ballast for tabelike fluorescent lamp | |
| CN2448666Y (en) | Electric locomotive dc converter | |
| CN217445278U (en) | Frequency-changing speed regulator for three-phase AC motor with mixed switch | |
| CN219513964U (en) | Alternating current soft start circuit of three-level energy storage converter | |
| CN111276954B (en) | Self-adaptive fault current limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |