CN104134569A - Series-connection double-fracture switching capacitor bank vacuum switch - Google Patents
Series-connection double-fracture switching capacitor bank vacuum switch Download PDFInfo
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- CN104134569A CN104134569A CN201410388213.6A CN201410388213A CN104134569A CN 104134569 A CN104134569 A CN 104134569A CN 201410388213 A CN201410388213 A CN 201410388213A CN 104134569 A CN104134569 A CN 104134569A
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- control device
- arc control
- vacuum switch
- electric capacity
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Abstract
The invention discloses a series-connection double-fracture switching capacitor bank vacuum switch which comprises a middle metal conductor, a first arc extinguishing chamber and a second arc extinguishing chamber. The first arc extinguishing chamber and the second arc extinguishing chamber are the same in shape structure and size. The middle metal conductor is connected with the movable end of the first arc extinguishing chamber and the static end of the second arc extinguishing chamber in series. The vacuum switch further comprises a first capacitor and a second capacitor, wherein the first capacitor and the second capacitor are different in specification, model and capacitance value. The first capacitor is connected with the first arc extinguishing chamber in parallel. The second capacitor is connected with the second arc extinguishing chamber in parallel. As a large number of experimental results show, on the basis that the arc extinguishing chambers are the same in shape structure and size, the arc extinguishing chambers are connected with the first capacitor and the second capacitor in parallel, the first capacitor and the second capacitor are different in specification, model and capacitance value, and therefore the purpose of balancing voltage distribution can be achieved, and the probability of postignition is greatly reduced; the capacitors small in capacitance value are low in cost and small in size, and the size of the vacuum switch can also be smaller.
Description
Technical field
the present invention relates to vacuum switch field, refer to especially a kind of series connection double-fracture opening-closing capacitor bank vacuum switch.
Background technology
In recent years, vacuum circuit-breaker with its long service life, can frequently cut-off, without advantages such as oil, few maintenances, in electric power system, be widely used, therefore also wish to replace oil-minimum breaker opening-closing capacitor bank with vacuum circuit-breaker.As everyone knows, vacuum switch can produce the switching overvoltage of various complexity in the process of opening-closing capacitor bank, if the performance of vacuum circuit-breaker is perfect not, easily occur restriking, can produce high overvoltage, bring serious harm to power equipment, limited vacuum circuit-breaker in this application on the one hand.
Application number is: 201320308095.4 utility model patent discloses and in one, pressed opening-closing capacitor bank vacuum switch structure, by the first arc control device, the second arc control device and middle electric-conductor are set, connected by middle electric-conductor with the top of the second arc control device in the bottom of the first arc control device.Can make two arc control device breaking arc that is simultaneously swift in motion, born the voltage of an original fracture by two fractures, make it have higher withstand voltage level, can bear the impact of the switching overvoltage after switched capacitor device group.This vacuum switch structure probability of also vacuum switch can only being restriked is in theory reduced to 0.0625%, cannot really realize zero and restrike, and still has in actual use potential safety hazard.Meanwhile, for the voltage that two arc control device of balance bear, often need to, at two each electric capacity that specifications and models are identical, capacitance is equal in parallel of arc control device, carry out balanced voltage with this and distribute.This electric capacity is all large electric capacity conventionally, and cost is higher, and volume is also larger, makes the volume of vacuum switch also larger.
Summary of the invention
For solving the problem of above-mentioned existence, the invention provides a kind of series connection double-fracture opening-closing capacitor bank vacuum switch, adopt 2 shunt capacitances of the low capacity value of different model specification, different capacitances, reach the uniform object of dividing potential drop that makes two vacuum interrupters, solve single capacitor and thrown, cut the problem that capacitor group is restriked, save greatly cost, increased substantially the fail safe of vacuum switch, there is considerable economic benefit.
The present invention adopts following technical scheme: a kind of series connection double-fracture opening-closing capacitor bank vacuum switch, comprise intermetallic metal conductor, shape and structure and measure-alike the first arc control device and the second arc control device, the moved end of the first arc control device and the quiet end of described the second arc control device described in described intermetallic metal conductor series connection, the first electric capacity and the second electric capacity that also comprise different size model, different capacitances, described the first electric capacity is in parallel with described the first arc control device; Described the second electric capacity is in parallel with the second arc control device.2 fractures itself have higher withstand voltage level, can bear the impact of the switching overvoltage after opening-closing capacitor bank, by experimental results demonstrate, on arc control device shape and structure and measure-alike basis, for the first electric capacity and second electric capacity of the low capacity value of double arc extinguishing chambers different size model in parallel, different capacitances, can reach the object that balanced voltage distributes, significantly reduce the probability of restriking.The electric capacity of low capacity value, cost is low, and volume is little, and the volume of vacuum switch also can littleization.
Preferably, the capacitance of described the first electric capacity is 20pf～400pf; The capacitance of described the second electric capacity is 70pf～500pf.The experiment proved that, the electric capacity of the low capacity value that capacitance is 20pf～400pf, all presses effectively, and cost is low, and volume is little, and the volume of vacuum switch also can littleization.
Further, the electric capacity difference of described the first electric capacity and the second electric capacity is 50pf.Now all press effect best.
Further, also comprise the short conductors of connection second movable end of arc extinguishing chamber and switch wire outlet terminal, between moved end and short conductors between the moved end of the first arc control device and intermetallic metal conductor and/or at the second arc control device, being provided with W type is flexible coupling, it is the annular soft copper sheet that a cross section is " W " type that described W type is flexible coupling, in it, ring is fixedly connected with the moved end of described the first arc control device or described the second arc control device, and its outer shroud is fixedly connected with corresponding described intermetallic metal conductor or described short conductors.
Further, the moving conductive rod on the moved end of described the first arc control device or described the second arc control device is coaxial with the interior ring that W type is flexible coupling, and described moving conductive rod equates with the diameter of interior ring; Described moving conductive rod is socketed on interior ring.The interior ring that W type is flexible coupling is coaxial with the moving conductive rod of arc control device, can ensure that aligning of moving conductive rod when vacuum switch is installed is vertical, has improved moving conductive rod and the W type synchronism of action that is flexible coupling, thereby has reduced to greatest extent the probability of restriking.
Further, in described intermetallic metal conductor and short conductors, be respectively equipped with the sleeve of conduction, the moved end of described the first arc control device and W type are flexible coupling and/or the moved end of the second arc control device and W type are flexible coupling is socketed on respectively in corresponding sleeve, and the outer shroud that described W type is flexible coupling is connected with sleeve lining.Moved end and the W type of sleeve socket arc control device are flexible coupling, and can play the effect of shielding, fix W type simultaneously and are flexible coupling, and the quiet end of the moved end of the first arc control device and the second arc control device is connected.
Further, also comprise long conductor, the quiet end of described long conductor connecting valve inlet wire and the first arc control device.
Further, also comprise the first insulated tension pole, the second insulated tension pole and operating mechanism, one end of described the first insulated tension pole is connected with the moved end of described the first arc control device, and the other end is connected with described operating mechanism; One end of described the second insulated tension pole is connected with the moved end of described the second arc control device, and the other end is connected with described operating mechanism.
Further, described the second arc control device are arranged on the side-lower of described the first arc control device, and described the first insulated tension pole and described the second insulated tension pole be arranged in parallel.
Preferably, switch end of incoming cables and/or switch wire outlet terminal are provided with full skirt.Can strengthen creepage distance, thereby meet the requirement in each height above sea levels such as 1000m, 1500m, 2000m, 2500m, 3000m.
Usefulness of the present invention is:
1, there is high withstand voltage level, under the horizontal 118KV/1min of industrial frequency withstand voltage, lightning impulse 215KV condition, there are 5KA, 10 KA, 15 KA, 20 KA close zero conclusion (of pressure testing) of restriking of shoving, and also have the short circuit current of cut-offfing 31.5KA ability.That domestic first hand has been broken through throwing, cut the back-to-back 400A of cut-offfing of capacitor group, 20KA zero record of restriking that shoves down;
2, adopt 2 shunt capacitances of the low capacity value of different model specification, different capacitances, reach the uniform object of dividing potential drop that makes two vacuum interrupters, solve single capacitor and thrown, cut the problem that capacitor group is restriked, increase substantially the fail safe of vacuum switch, low capacity value electric capacity has been saved cost greatly, has considerable economic benefit; The volume of vacuum switch also can littleization;
3, W type is flexible coupling and connects moved end and the sleeve of arc control device, in it, ring is coaxial with the moving conductive rod of arc control device, can ensure that aligning of moving conductive rod when vacuum switch is installed is vertical, improve moving conductive rod and the W type synchronism of action that is flexible coupling, thereby reduced to greatest extent the probability of restriking; Sleeve also plays shielding action simultaneously;
4, applied widely, can realize 12KV, 24KV, 27.5KV, the 40.5KV vacuum switch switched capacitor for aspects such as electric power, wind-powered electricity generation, metallurgy, improve the stability of fail safe and the power supply operation of switched capacitor.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the local enlarged diagram that W type of the present invention is flexible coupling;
Reference numeral: 1, the first arc control device; 2, the second arc control device; 3, the first electric capacity; 4, the second electric capacity; 5, intermetallic metal conductor; 6, W type is flexible coupling; 7, short conductors; 8, long conductor; 9, full skirt; 10, sleeve.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As shown in Figure 1, series connection double-fracture opening-closing capacitor bank vacuum switch, comprise intermetallic metal conductor 5, shape and structure and measure-alike the first arc control device 1 and the second arc control device 2, intermetallic metal conductor 5 the connect moved end of the first arc control device 1 and the quiet end of described the second arc control device 2, the first arc control device 1 the first electric capacity 3 in parallel, the second arc control device 2 the second electric capacity 4, the first electric capacity 3 in parallel and the second electric capacity 4 are different size model, different capacitance.Wherein, 2 fractures itself have higher withstand voltage level, can bear the impact of the switching overvoltage after opening-closing capacitor bank, by experimental results demonstrate, on arc control device shape and structure and measure-alike basis, for double arc extinguishing chambers different size model in parallel, the first electric capacity 3 and second electric capacity 4 of the low capacity value of different capacitances, can reach the object that balanced voltage distributes, significantly reduce the probability of restriking, at the horizontal 118KV/1min of industrial frequency withstand voltage, under lightning impulse 215KV condition, there is 5KA, 10 KA, 15 KA, 20 KA close zero conclusion (of pressure testing) of restriking of shoving.The electric capacity of low capacity value, all presses effectively, and cost is low, and volume is little, and the volume of vacuum switch also can littleization.
The capacitance of the first electric capacity 3 is 20pf～400pf; The capacitance of the second electric capacity 4 is 70pf～500pf.In the time that the first electric capacity 3 is 50pf, the second electric capacity 4 can be 100pf.The experiment proved that, in the time that the electric capacity difference of the first electric capacity 3 and the second electric capacity 4 is 50pf, now all press effect best.
Short conductors 7 connects the second arc control device 2 moved ends and switch wire outlet terminal, in the present embodiment, between the moved end and intermetallic metal conductor 5 of the first arc control device 1, and between the moved end and short conductors 7 of the second arc control device 2, all be provided with W type and be flexible coupling 6, as shown in Figure 2, it 6 be a cross section is the annular soft copper sheet of " W " type that W type is flexible coupling, the interior ring that W type is flexible coupling is fixedly connected with the moved end of the second arc control device with the first arc control device respectively, and outer shroud is fixedly connected with the inwall of the sleeve 10 in corresponding intermetallic metal conductor 5 and short conductors 7 respectively, realize the series connection conduction of the quiet end of the first movable end of arc extinguishing chamber 1 and the second arc control device 2.
Be flexible coupling 6 interior ring of moving conductive rod on the moved end of the first arc control device 1 and the second arc control device 2 and W type is coaxial, and moving conductive rod equates with the diameter of interior ring; Moving conductive rod is socketed on interior ring.Be flexible coupling 6 interior ring of W type is coaxial with the moving conductive rod of arc control device, can ensure that aligning of moving conductive rod when vacuum switch is installed is vertical, has improved moving conductive rod and the W type synchronism of 6 actions that is flexible coupling, thereby has reduced to greatest extent the probability of restriking.
The moved end of the first arc control device and W type are flexible coupling and are socketed in the sleeve of intermetallic metal conductor 5, and the moved end of the second arc control device and W type are flexible coupling and are socketed in the sleeve of short conductors 7.Moved end and the W type of sleeve socket arc control device are flexible coupling, and can play the effect of shielding, fix W type simultaneously and are flexible coupling, and the quiet end of the moved end of the first arc control device 1 and the second arc control device 2 is electrically connected.
Also can be only in the moved end of the first arc control device 1 or the moved end of the second arc control device 2 W type be set be separately flexible coupling 6, also can reach the object that reduces the probability of restriking.
The quiet end of long conductor 8 connecting valve inlet wires and the first arc control device 1.
Further, in above-mentioned series connection double-fracture opening-closing capacitor bank vacuum switch, also comprise the first insulated tension pole, the second insulated tension pole and operating mechanism, one end of the first insulated tension pole is connected with the moved end of the first arc control device, and the other end is connected with described operating mechanism; One end of the second insulated tension pole is connected with the moved end of the second arc control device, and the other end is connected with operating mechanism.
The second arc control device 2 are arranged on the side-lower of described the first arc control device 1, and the first insulated tension pole and described the second insulated tension pole be arranged in parallel.
Full skirt 9 also can be set on switch end of incoming cables and/or switch wire outlet terminal.Can strengthen creepage distance, thereby meet the requirement in each height above sea levels such as 1000m, 1500m, 2000m, 2500m, 3000m.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; in the form and details the present invention is made a variety of changes, be protection scope of the present invention.
Claims (10)
1. a series connection double-fracture opening-closing capacitor bank vacuum switch, comprise intermetallic metal conductor, shape and structure and measure-alike the first arc control device and the second arc control device, the moved end of the first arc control device and the quiet end of described the second arc control device described in described intermetallic metal conductor series connection, it is characterized in that, the first electric capacity and the second electric capacity that also comprise different size model, different capacitances, described the first electric capacity is in parallel with described the first arc control device; Described the second electric capacity is in parallel with the second arc control device.
2. series connection double-fracture opening-closing capacitor bank vacuum switch as claimed in claim 1, is characterized in that, the capacitance of described the first electric capacity is 20pf～400pf; The capacitance of described the second electric capacity is 70pf～500pf.
3. will remove the series connection double-fracture opening-closing capacitor bank vacuum switch as described in 2 as right, it is characterized in that, the electric capacity difference of described the first electric capacity and the second electric capacity is 50pf.
4. the series connection double-fracture opening-closing capacitor bank vacuum switch as described in claim 1-3 any one, it is characterized in that, also comprise the short conductors of connection second movable end of arc extinguishing chamber and switch wire outlet terminal, between the moved end and intermetallic metal conductor of the first arc control device, and/or between the moved end and short conductors of the second arc control device, being provided with W type is flexible coupling, it is the annular soft copper sheet that a cross section is " W " type that described W type is flexible coupling, in it, ring is fixedly connected with the moved end of described the first arc control device or described the second arc control device, its outer shroud is fixedly connected with corresponding described intermetallic metal conductor or described short conductors.
5. series connection double-fracture opening-closing capacitor bank vacuum switch as claimed in claim 4, it is characterized in that, moving conductive rod on the moved end of described the first arc control device or described the second arc control device is coaxial with the interior ring that W type is flexible coupling, and described moving conductive rod equates with the diameter of interior ring; Described moving conductive rod is socketed on interior ring.
6. series connection double-fracture opening-closing capacitor bank vacuum switch as claimed in claim 5, it is characterized in that, in described intermetallic metal conductor and short conductors, be respectively equipped with the sleeve of conduction, the moved end of described the first arc control device and W type are flexible coupling and/or the moved end of the second arc control device and W type are flexible coupling is socketed on respectively in corresponding sleeve, and the outer shroud that described W type is flexible coupling is connected with sleeve lining.
7. series connection double-fracture opening-closing capacitor bank vacuum switch as claimed in claim 6, is characterized in that, also comprises long conductor, the quiet end of described long conductor connecting valve inlet wire and the first arc control device.
8. series connection double-fracture opening-closing capacitor bank vacuum switch as claimed in claim 7, it is characterized in that, also comprise the first insulated tension pole, the second insulated tension pole and operating mechanism, one end of described the first insulated tension pole is connected with the moved end of described the first arc control device, and the other end is connected with described operating mechanism; One end of described the second insulated tension pole is connected with the moved end of described the second arc control device, and the other end is connected with described operating mechanism.
9. series connection double-fracture opening-closing capacitor bank vacuum switch as claimed in claim 8, is characterized in that, described the second arc control device are arranged on the side-lower of described the first arc control device, and described the first insulated tension pole and described the second insulated tension pole be arranged in parallel.
10. series connection double-fracture opening-closing capacitor bank vacuum switch as claimed in claim 1, is characterized in that, switch end of incoming cables and/or switch wire outlet terminal are provided with full skirt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388213.6A CN104134569A (en) | 2014-08-08 | 2014-08-08 | Series-connection double-fracture switching capacitor bank vacuum switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388213.6A CN104134569A (en) | 2014-08-08 | 2014-08-08 | Series-connection double-fracture switching capacitor bank vacuum switch |
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| Publication Number | Publication Date |
|---|---|
| CN104134569A true CN104134569A (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410388213.6A Pending CN104134569A (en) | 2014-08-08 | 2014-08-08 | Series-connection double-fracture switching capacitor bank vacuum switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749367A (en) * | 2017-10-30 | 2018-03-02 | 许继集团有限公司 | A kind of vacuum switch and breaker |
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| US3147356A (en) * | 1961-03-15 | 1964-09-01 | Joslyn Mfg & Supply Co | Circuits for switches having series connected interrupter sections |
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| CN203983141U (en) * | 2014-08-08 | 2014-12-03 | 麦克奥迪（厦门）电气股份有限公司 | Series connection double-fracture opening-closing capacitor bank vacuum switch |
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2014
- 2014-08-08 CN CN201410388213.6A patent/CN104134569A/en active Pending
Patent Citations (6)
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| US3147356A (en) * | 1961-03-15 | 1964-09-01 | Joslyn Mfg & Supply Co | Circuits for switches having series connected interrupter sections |
| US4204101A (en) * | 1977-06-22 | 1980-05-20 | Gould Inc. | Hybrid circuit breaker with varistor in parallel with vacuum interrupter |
| CN201259863Y (en) * | 2008-07-02 | 2009-06-17 | 深圳市光辉电器实业有限公司 | Cap type soft connection for vacuum circuit breaker |
| CN202332692U (en) * | 2011-11-17 | 2012-07-11 | 武汉大学 | Dynamic pressure-equalizing device for multi-fracture high-pressure vacuum circuit breaker |
| CN103325609A (en) * | 2013-05-31 | 2013-09-25 | 陈波 | Vacuum switch for medium-voltage switching capacitor bank |
| CN203983141U (en) * | 2014-08-08 | 2014-12-03 | 麦克奥迪（厦门）电气股份有限公司 | Series connection double-fracture opening-closing capacitor bank vacuum switch |
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| 舒胜文等: "双断口真空断路器的瞬态恢复电压分配机理与均压电容研究", 《电网技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107749367A (en) * | 2017-10-30 | 2018-03-02 | 许继集团有限公司 | A kind of vacuum switch and breaker |
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Application publication date: 20141105 |
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