CN204633340U - A kind of quick combined capacitor fling-cut switch - Google Patents
A kind of quick combined capacitor fling-cut switch Download PDFInfo
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- CN204633340U CN204633340U CN201520347489.XU CN201520347489U CN204633340U CN 204633340 U CN204633340 U CN 204633340U CN 201520347489 U CN201520347489 U CN 201520347489U CN 204633340 U CN204633340 U CN 204633340U
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- contactor
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- thyristor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model relates to the Technology of Dynamic Reactive Power Compensation field of electric equipment, particularly relates to a kind of quick combined capacitor fling-cut switch.Quick combined capacitor fling-cut switch, comprise two bidirectional thyristors in parallel and N road cut-in and cut-off contactor group, wherein N is more than or equal to 2, all selection contactor (KJ1) inputs link together and form switching bus, it is characterized in that: described bidirectional thyristor in parallel is connected between phase line and switching bus, wherein each road cut-in and cut-off contactor comprises selection contactor (KJ1), perform contactor (KJ2), electric capacity output connects zero line or an other road phase line, electric capacity input is respectively with selection contactor (KJ1) with perform contactor (KJ2) output and be connected, the input of contactor (KJ1) is selected to be connected with the output of two parallel thyristors, the phase line that the input performing contactor (KJ2) is connected with bidirectional thyristor is connected.The features such as it is high that the utility model has reliability, and maintainability is good.
Description
Technical field
The utility model relates to the Technology of Dynamic Reactive Power Compensation field of electric equipment, particularly relates to a kind of Combined electric capacity fling-cut switch based on large-capacity dynamic reactive power compensating.
Background technology
Capacitor fling-cut switch, as the important switch block for switched capacitor in reactive-load compensation equipment, is one of the focus in reactive power compensation technology field always.Traditional fling-cut switch mainly contains static Non-energy-consumption electromechanical contactors, thyristor and combination switch etc., often apply as single loop capacitor switching, but all there is certain defect, as contactor, during switching can not operating passing zero, fragile, switching loss large, mechanical endurance and switching frequency very limited; Thyristor, keep-process has larger quiescent dissipation, and caloric value is large, withstand shock ability, and fragile, cost is high; Combination switch, the load-bearing capacity of bearing is less, and control mode is single, and cost is higher.
Application number is the utility model patent of 201420228674.2, discloses a kind of Combined electric capacity fling-cut switch, relates to the improvement of capacitor fling-cut switch.Technical scheme adopts a plurality of static Contactor without energy-consuming group comprising thyristor, be made up of dissimilar contactor, adopts a thuristor throw-in and throw-off multichannel Capacitor banks.The beneficial effect of this utility model is that N road contactor group shares a capacitor switching loop, and the voltages such as the process of input employing or no-voltage drop into, add the effect of current-limiting inductance and continued flow switch, reduce shoving of capacitor switching branch road, increase the capacitor switching ability in single switching loop, decrease contactor group total loop number, reduce system cost.
Traditional capacitor fling-cut switch is all the mode adopting single switching, utilizes static Contactor without energy-consuming, thyristor and combination switch etc., realizes single loop capacitor switching, all there is certain defect.And above-mentioned Combined type fling-cut switch utilizes single thyristor and the direct switched capacitor of contactor group, although improve the useful life of fling-cut switch to a certain extent, reduce system cost, but because every phase loop all only shares a thyristor, causing switching action next time to wait until, last switching action all completes just can carry out, and the make-break operation time of contactor is all long, in hundreds of millisecond magnitude, for the dynamic passive compensation application requiring dynamic response time shorter, the dynamic characteristic of this switch is often difficult to meet the demands, directly cause reactive power compensation poor effect.And N road contactor group relies on same thuristor throw-in and throw-off, cause thuristor throw-in and throw-off too frequent, easily cause damage, particularly when site of deployment ambient temperature is higher, the reliability of thyristor is lower, once there be a thyristor to damage, whole system will be caused all cannot to run.
Summary of the invention
For the deficiency of background technology, the purpose of this utility model is, provides a kind of quick combined capacitor fling-cut switch.The utility model adopts cut-in and cut-off contactor group to have the low on-resistance mode of contact to run, share two switching loops by N road cut-in and cut-off contactor group and realize capacitor switching, two thyristors shared participate in switching operation in turn, system according to required compensating reactive power capacity determine to drop into electric capacity number, control corresponding switching loop and switch.
Because N road contactor group shares two capacitor switching loops, when this switching action does not complete, just can carry out switching action next time according to actual needs, the dynamic characteristic of switch is improved, simultaneously, because every phase loop participates in switching by two thyristor rotations, the switching frequency of single thyristor is made to have dropped half, so the probability that single thyristor damages also reduces greatly, even if certain thyristor has damaged, another one thyristor can also continue separately to participate in switching, and be unlikely to cause whole system to run, only this phase loop becomes the shared thuristor throw-in and throw-off of N road contactor group.Whether normal operating conditions is in for thyristor, present control system is easy to just can judge by state feedback, when certain thyristor damages, control system can by closing the thyristor that the shielding of switching gate control signal damages, the concurrent alarm signal that is out of order, according to warning message, field personnel just can notify that the technical staff of manufacturer ascertains the reason and keeps in repair, another advantage of this technical scheme visible is, before technical staff reaches the spot maintenance, system is as usual normal to be run, unaffected.For jumbo reactive compensation system, as long as many operations of system one day, the economic benefit of generation is all considerable.So although this technical scheme makes the hardware cost of device itself increase to some extent, but the part that cost increases only accounts for about 1% of whole system hardware cost, and ratio is quite low, and the raising of system reliability and maintainability also displaced cost, even can obtain higher benefit.
For realizing above-mentioned target, the technical scheme that the utility model adopts is: a kind of quick combined capacitor fling-cut switch, comprise two bidirectional thyristors in parallel and N road cut-in and cut-off contactor group, wherein N is more than or equal to 2, all selection contactor KJ1 inputs link together and form switching bus, it is characterized in that: described bidirectional thyristor in parallel is connected between phase line and switching bus, wherein each road cut-in and cut-off contactor comprises selection contactor KJ1, perform contactor KJ2, electric capacity output connects zero line or an other road phase line, electric capacity input is respectively with selection contactor KJ1 with perform contactor KJ2 output and be connected, the input of contactor KJ1 is selected to be connected with the output of two parallel thyristors, the phase line that the input performing contactor KJ2 is connected with bidirectional thyristor is connected.
Quick combined capacitor fling-cut switch as above, is characterized in that: every phase loop adopts two bidirectional thyristors to carry out switching in turn, and the operation of this switching is without the need to waiting until that last time, switching operated, and the switching operation of two-way thyristor is completely independent.Its beneficial effect is: two-way thyristor is mutually unaffected, and dynamic is strong.Meanwhile, the switching frequency of each thyristor have dropped half, so the probability that single thyristor damages also reduces greatly.
Quick combined capacitor fling-cut switch as above, is characterized in that: when certain thyristor in certain phase loop damages, the thyristor that control system is damaged by closing the shielding of switching gate control signal, and another one thyristor continues separately to participate in switching.Its beneficial effect is: whole system is run as usual, and reliability is high, maintainable good.
Combined type fling-cut switch as above, it is characterized in that: described selection contactor is all perform identical action with performing contactor in circuit, but be not simultaneously, switching action is each and drops into or excision one tunnel, and N road electric capacity drops into be needed to perform the action of N input.
The beneficial effects of the utility model are:
(1) every phase loop adopts two bidirectional thyristors in parallel to carry out switching in turn, the operation of this switching is without the need to waiting until that last time, switching operated, simultaneously, the switching frequency of each thyristor have dropped one times, and the technical program is significantly strengthened by the dynamic characteristic of Combined type fling-cut switch and the probability that single thyristor damages also reduces greatly.
(2) when certain thyristor in certain phase loop damages, the thyristor that control system is damaged by the switching gate control signal shielding of closing thyristor, makes it exit switching loop, another one thyristor continues separately to participate in switching, whole system is run as usual, and reliability is high, maintainable good.Before technical staff reaches the spot handling failure, equipment, without the need to shutting down, can continue to produce economic benefit, and the function of equipment and fail safe is not affected substantially.
Accompanying drawing explanation
Fig. 1 is system configuration theory of constitution schematic diagram of the present utility model.
Fig. 2 is the system schema schematic diagram of the utility model embodiment.
Embodiment
Description of reference numerals: KZ1, KZ2 are thyristor, KJ1 and KJ2 is contactor, and A1, A2 represent the 1st tunnel, No. 2nd contactor respectively.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
The utility model provides one Combined electric capacity fling-cut switch fast, comprises connecting the N road contactor group of Capacitor banks and two thyristors in parallel are formed, N road contactor group respectively by selection contactor KJ1 with perform contactor KJ2 and form, as shown in Figure 2.The utility model adopts thuristor throw-in and throw-off, adopts cut-in and cut-off contactor group to have the low on-resistance mode of contact to run.Share two switching loops by N road cut-in and cut-off contactor group and realize capacitor switching.Two thyristors shared participate in switching operation in turn.System according to required compensating reactive power capacity determine to drop into electric capacity number, control corresponding switching loop and switch.Each thyristor all drops into when both end voltage zero passage own, excises when capacitance current zero passage.The first via can be divided into drop into stage, the second tunnel input stage for whole switching process and the first via excises the stage, the stage is excised on the second tunnel.First via input excision operation drops into excise with the second tunnel and operates completely independently, unaffected mutually, carries out switching operation in turn.
Following contactor KJ1 represents all selection contactors in the 1st tunnel, the 2nd road to N road; Contactor KJ2 represents all execution contactors in the 1st tunnel, the 2nd road to N road, system according to required compensating reactive power capacity determine to drop into electric capacity number, control corresponding switching loop and switch.Such as, as needs drop into first three road electric capacity, then first three road selects contactor to perform identical action in circuit, and the selection contactor on other roads does not then perform.Contactor is selected to be all perform identical action in circuit with performing contactor, but not simultaneously, switching action is each only input or excision one tunnel, that is first three road electric capacity drops into the input action (two thyristors use in turn) needing execution three times same, N road electric capacity drops into be needed to perform the action of N input, this is the way that everybody follows, and object is to ensure the level and smooth of input process, instead of whole input of being rushed forward by required electric capacity or excision.
It is specific as follows that the first via drops into phase process: Systematical control selects contactor KJ1 to drop into and feedback states signal in the suitable moment, thyristor KZ1 dropped into and feedback states signal in the voltage zero-cross moment, perform contactor KJ2 to drop into and feedback states signal, now electric current runs branch road by the change of current of switching loop to conducting, at capacitance current zero crossing successively cutoff thyristor KZ1 and selection contactor KJ1, and feedback states signal, complete the first via and drop into the stage.
First via excision phase process is specific as follows: now, the building-out capacitor of certain branch road is run branch road by conducting and is performed contactor KJ2 and hangs in electrical network, contactor KJ1 is selected to drop into and feedback states signal control, thyristor KZ1 dropped into and feedback states signal in the voltage zero-cross moment, after switching branch road has controlled, control to disconnect and perform contactor KJ2 and feedback states signal, excise thyristor KZ1 successively and select contactor KJ1 and feed back, complete first via excision process.
It is specific as follows that phase process is dropped on second tunnel: Systematical control selects contactor KJ1 to drop into and feedback states signal in the suitable moment, thyristor KZ2 dropped into and feedback states signal in the voltage zero-cross moment, perform contactor KJ2 to drop into and feedback states signal, now electric current runs branch road by the change of current of switching loop to conducting, at capacitance current zero crossing successively cutoff thyristor KZ2 and selection contactor KJ1, and feedback states signal, complete the second tunnel and drop into the stage.
Second tunnel excision phase process is specific as follows: now, the building-out capacitor of certain branch road is run branch road by conducting and is performed contactor KJ2 and hangs in electrical network, contactor KJ1 is selected to drop into and feedback states signal control, thyristor KZ2 dropped into and feedback states signal in the voltage zero-cross moment, after switching branch road has controlled, control to disconnect and perform contactor KJ2 and feedback states signal, excise thyristor KZ2 successively and select contactor KJ1 and feed back, complete the second tunnel excision process.
As shown in Figure 1, quick combined capacitor fling-cut switch of the present utility model, comprise two bidirectional thyristors in parallel and N road cut-in and cut-off contactor group, wherein N is more than or equal to 2, all selection contactor KJ1 inputs link together and form switching bus, described bidirectional thyristor in parallel is connected between phase line and switching bus, wherein each road cut-in and cut-off contactor comprises selection contactor KJ1, performs contactor KJ2, electric capacity output connects zero line or an other road phase line, and electric capacity input is respectively with selection contactor KJ1 with perform contactor KJ2 output and be connected; The input of contactor KJ1 is selected to be connected with the output of two parallel thyristors; The phase line that the input performing contactor KJ2 is connected with bidirectional thyristor is connected.(with reference to Figure of description, top is input, and below is output, and equally, one end, top of each contactor, thyristor, electric capacity is input, and one end, below is output).
These are only embodiment of the present utility model, be not limited to the utility model, therefore, all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., all should be included within right of the present utility model.
Claims (4)
1. a quick combined capacitor fling-cut switch, comprise two bidirectional thyristors in parallel and N road cut-in and cut-off contactor group, wherein N is more than or equal to 2, all selection contactor (KJ1) inputs link together and form switching bus, it is characterized in that: described bidirectional thyristor in parallel is connected between phase line and switching bus, wherein each road cut-in and cut-off contactor comprises selection contactor (KJ1), perform contactor (KJ2), electric capacity output connects zero line or an other road phase line, electric capacity input is respectively with selection contactor (KJ1) with perform contactor (KJ2) output and be connected, the input of contactor (KJ1) is selected to be connected with the output of two parallel thyristors, the phase line that the input performing contactor (KJ2) is connected with bidirectional thyristor is connected.
2. quick combined capacitor fling-cut switch as claimed in claim 1, it is characterized in that: every phase loop adopts two bidirectional thyristors to carry out switching in turn, the operation of this switching is without the need to waiting until that last time, switching operated, and the switching operation of two-way thyristor is completely independent.
3. quick combined capacitor fling-cut switch as claimed in claim 1, it is characterized in that: when certain thyristor in certain phase loop damages, the thyristor that control system is damaged by closing the shielding of switching gate control signal, another one thyristor continues separately to participate in switching.
4. quick combined capacitor fling-cut switch as claimed in claim 1, it is characterized in that: described selection contactor is all perform identical action with performing contactor in circuit, but not simultaneously, switching action is each only input or excision one tunnel, and electric capacity input in N road needs to perform N time and drops into action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520347489.XU CN204633340U (en) | 2015-05-27 | 2015-05-27 | A kind of quick combined capacitor fling-cut switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520347489.XU CN204633340U (en) | 2015-05-27 | 2015-05-27 | A kind of quick combined capacitor fling-cut switch |
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| Publication Number | Publication Date |
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| CN204633340U true CN204633340U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520347489.XU Expired - Fee Related CN204633340U (en) | 2015-05-27 | 2015-05-27 | A kind of quick combined capacitor fling-cut switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109263287A (en) * | 2018-08-15 | 2019-01-25 | 珠海艾派克微电子有限公司 | RC switching circuit, electrical storage device and printing material replace component |
-
2015
- 2015-05-27 CN CN201520347489.XU patent/CN204633340U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109263287A (en) * | 2018-08-15 | 2019-01-25 | 珠海艾派克微电子有限公司 | RC switching circuit, electrical storage device and printing material replace component |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20210527 |
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| CF01 | Termination of patent right due to non-payment of annual fee |