CN201576636U - Parallel-connection circuit breaker based on tightly-coupling hollow reactor - Google Patents
Parallel-connection circuit breaker based on tightly-coupling hollow reactor Download PDFInfo
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- CN201576636U CN201576636U CN2009202686299U CN200920268629U CN201576636U CN 201576636 U CN201576636 U CN 201576636U CN 2009202686299 U CN2009202686299 U CN 2009202686299U CN 200920268629 U CN200920268629 U CN 200920268629U CN 201576636 U CN201576636 U CN 201576636U
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- tightly coupled
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- air reactor
- circuit breaker
- coupled air
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- 238000010168 coupling process Methods 0.000 title abstract description 13
- 238000005859 coupling reaction Methods 0.000 title abstract description 13
- 239000012212 insulator Substances 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- -1 ground floor Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000011229 interlayer Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 description 6
- 230000004907 flux Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a parallel-connection circuit breaker based on a tightly-coupling hollow reactor, which belongs to the field of high-capacity circuit breaker devices and aims at automatically equalizing current and limiting current and realizing the parallel-connection running of the circuit breakers through the tightly-coupling hollow reactor. Current input terminals of two arms of the tightly-coupling hollow reactor are mounted on the same side of the reactor, are short-circuited and connected to a system through the welding with a wire board; current output terminals of the two arms are welded with the wire board and then are connected with two circuit breakers respectively; the other terminals of the circuit breakers are short-circuited and are connected with the system, so that the whole parallel-connection circuit breaker device based on the tightly-coupling hollow reactor is connected into the system in series; and the wire board at the output terminal of the tightly-coupling hollow reactor is supported by a strut insulator and is fixed on a prefabricated platform. In the utility model, the circuit breakers are connected in parallel by the tightly-coupling hollow reactor so as to doubly break short circuit current and improve the whole breaking capacity.
Description
Technical field
The utility model relates to a kind of parallel circuit breaker based on tightly coupled air reactor, belongs to high-voltage large-capacity circuit breaker assembly field.
Background technology
Along with the high speed development of electric power system, short circuit current level sharply increases, and the rupturing capacity of original switchgear can not meet the demands; Simultaneously; based on the station service reliability and excise requirements such as fault fast; installing generator outlet circuit breaker (GCB) is considered in increasing power plant; but high-rating generator outlet short circuit current is big; domestic GCB product rupturing capacity does not meet the demands; even imported product meets the demands, but its price is extremely expensive, and protection brings obstacle to generator outlet.
The short circuit current of electric power system is also increasing, after especially 500kV transformer station short circuit current sharply increases, causes transformer station to install that rupturing capacity is not enough fully.The 500kV short circuit current of Guangdong, Fujian two province's electrical network distant views will reach 70kA, and 220kV system short-circuit electric current may surpass 80kA, and this has exceeded the connecting-disconnecting function of the maximum 63kA of circuit breaker of homemade maximum rupturing capacity.Though existing abroad connecting-disconnecting function surpasses the circuit breaker of 100kA, it is few to produce this model number of devices in the world, and price is inevitable high.
At present the circuit breaker of voltage levels mostly is gas-break switch, solves the excessive direct method of short circuit current no more than improving the connecting-disconnecting function of existing gas-break switch.But, in the short time gas-break switch connecting-disconnecting function is increased to hundreds of kilo-amperes, the very big difficulty of technical existence by existing conventional 63kA grade.
The circuit breaker parallel technology can significantly improve circuit breaker interrupting capacity.Improving the circuit breaker breaking capacity by a plurality of arc control device parallel waies, can significantly improve the current capacity and the short circuit current breaking capacity of circuit breaker under existence conditions, is a kind of feasible scheme therefore.But, directly, still can not solve the excessive problem of short circuit current with the circuit breaker not same period of the problem that has operation in parallel; Not only synchronization dependability is low to realize the circuit breaker parallel connection with synchronous holding device, and cost is very high, does not therefore up to the present obtain promoting; Though adopt the parallel way of direct series inductance can guarantee current-sharing effect preferably, inductance can increase normal operation impedance, reduces the circuit conveying capacity greatly, and can improve use cost.Therefore above-mentioned scheme poor reliability in parallel can not satisfy the requirement that parallel connection is cut-off.
Chinese patent 200710052947.7 " parallel circuit breaker " is though mentioned the parallel technology of circuit breaker, but only be confined to a kind of conceptual design, and its reactor part is confined to core type reactor, has the inherent defect of iron-core reactors such as saturated, heating during work.
Chinese patent 200810197118.2 " hollow coupling reactor " is though have circuit breaker components in parallel---the design philosophy of mutual reactor, but in concrete structure, do not consider heat radiation, in actual motion, must cause serious consequence, thereby not have feasibility.
The utility model content
The purpose of this utility model is to provide a kind of parallel circuit breaker based on tightly coupled air reactor, this circuit breaker utilization has the little tightly coupled air reactor of energy consumption under the high degree of coupling, the normal operating conditions, use in conjunction with circuit breaker, can effectively realize the automatic current equalizing and the current-limiting function of reactor, thereby realize circuit breaker parallel connection truly, increase exponentially the ability that circuit breaker bears rated current and short circuit current.
The technical solution of the utility model is: based on the parallel circuit breaker of tightly coupled air reactor, it is characterized in that: form by tightly coupled air reactor and circuit breaker in parallel, its connected mode is: the current input terminal of tightly coupled air reactor two arms is in the same side of reactor, and short circuit, by welding the system of being connected into mutually with terminal block, the current output terminal of two arms by with terminal block mutually postwelding be connected with two circuit breakers respectively, the other end short circuit of circuit breaker also is connected with system, thereby whole release unit series connection connecting system in parallel based on tightly coupled air reactor, tightly coupled air reactor output terminal block supports with post insulator, is fixed on the prefabricated platform.
Aforesaid parallel circuit breaker based on tightly coupled air reactor is characterized in that: circuit breaker in parallel is high-voltage large-capacity gas arc control device circuit breakers, totally two, and parallel connection.
Aforesaid parallel circuit breaker based on tightly coupled air reactor, it is characterized in that: tightly coupled air reactor is cylinder type, is made of terminal block, post insulator and some individual layer inductance coils respectively.
The aforesaid disconnected type road of parallel connection device based on tightly coupled air reactor, it is characterized in that: all individual layer inductance coils are by solid conductor coiling or bundle conductor and around forming, hierarchal arrangement, the interlayer turn-to-turn all has insulation, the coaxial arrangement of these inductance coils, have a central shaft, and equal turn numbers, thereby reach tightly coupled purpose.
Aforesaid parallel circuit breaker based on tightly coupled air reactor, it is characterized in that: when electric current is flowed through all inductance coils, the magnetic direction of responding in the adjacent inductance coil is opposite, all induce the inductance coil parallel connection of magnetic direction in the same way, an arm that is equivalent to tightly coupled air reactor, the all individual layer inductance coil of each arm is around to identical, connection parallel with one another.
Aforesaid parallel circuit breaker based on tightly coupled air reactor, it is characterized in that: each of tightly coupled air reactor layer have only same around to inductance coil, adjacent inductance coil around on the contrary, innermost layer with tightly coupled air reactor is a ground floor, outermost layer is last one deck meter, it between the ground floor and the second layer layer insulation pressure-resistant material, ground floor, insulating material and the second layer are one altogether and seal, also be that first is sealed, be heat radiation air air flue between sealing and sealing, by that analogy, sealing until outermost.
Aforesaid parallel circuit breaker based on tightly coupled air reactor is characterized in that: the tightly coupled air reactor inductance coil is an air-core inductance, thereby guarantees good linearty.
The beneficial effects of the utility model are: based on the parallel circuit breaker device of tightly coupled air reactor, the level that circuit breaker cut-offs short circuit current under the equal electric pressure that has been doubled and redoubled, the whole connecting-disconnecting function of raising system, and the utility model can not bring extra impedance to system circuit substantially under nominal situation, very little to the influence of system.And when breaking down, utilize inductive reaction, realize the automatic current equalizing of two branch roads, thereby realize the automatic parallel connection of circuit breaker, even circuit breaker is inconsistent operate time, tightly coupled air reactor automatic current limiting under the effect of coupling inductance, also can the bonding branch breaker normally cut-off reached the purpose that the small parameter circuit breaker cut-offs big short circuit current.
Description of drawings
Fig. 1 is two individual layer inductance coil coiling mode schematic diagrames during one of the utility model tightly coupled air reactor is sealed.
Fig. 2 for one of the utility model tightly coupled air reactor seal in two individual layer inductance coils and dielectric voltage withstand material position concern vertical view.
Fig. 3 for one of the utility model tightly coupled air reactor seal in axial plane cutaway view in two individual layer inductance coils and dielectric voltage withstand material position relation and the electric current input/output terminal conductor connected mode.
Fig. 4 for the utility model only contain two seal based on axial plane cutaway view in the circuit breaker in parallel of tightly coupled air reactor.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
Description of symbols among Fig. 1: 1,2,3,4 be the individual layer inductance coil.
Description of symbols among Fig. 2: 5-dielectric voltage withstand material, 6-is around to two opposite individual layer inductance coils.
Description of symbols among Fig. 4: 7-dielectric voltage withstand material, 8-air, 9,11,13, the 15-current input terminal, 10,12,14, the 16-current output terminal, 17,19-circuit breaker input, 18,20-circuit breaker output.
As shown in Figure 1, two individual layer inductance coil 1-2,3-4 during of tightly coupled air reactor seals, 1-2,3-4 be around on the contrary, makes that the flow direction that produces in the two individual layer inductance coils is opposite when individual layer inductance coil 1, individual layer inductance coil 3 ends pass in the same way electric current.The conductor that each individual layer inductance coil uses or be solid conductor, or for the division winding and around forming.
As shown in Figure 2, determine the turn-to-turn insulation of coil and the dielectric voltage withstand grade of layer insulation, by dielectric voltage withstand material 5, seal around being collectively referred to as one to two opposite individual layer inductance coils 6 according to the electric pressure of coil place system.
As shown in Figure 3, one seal, for reducing requirement to two individual layer inductance coil layer insulations, stipulate that it all is to flow to output from input that two coil currents flow to, promptly flow to individual layer inductance coil 2 from individual layer inductance coil 1, flow to individual layer inductance coil 4 from individual layer inductance coil 3, or all flow to input from output; Guarantee so axially be between the approaching wire turn in same position or position, voltage is as far as possible little.Because two coil winding-directions are opposite, when two coils passed through equal-sized electric current, the magnetic flux that two coils produce was cancelled out each other.
As shown in Figure 4, seal for being one between dielectric voltage withstand material, current input terminal 11 and the current output terminal 12 between current input terminal 9 and the current output terminal 10, seal for being one between dielectric voltage withstand material, current input terminal 15 and the current output terminal 16 between current input terminal 13 and the current output terminal 14, two are heat radiation air air flue between sealing, and the power consumption the when horizontal range of air flue is worked with tightly coupled air reactor is relevant.Link to each other with system one end behind two current input terminals of sealing 9, current input terminal 11, current input terminal 13, the current input terminal 15 mutual short circuits, two current output terminals of sealing are by around to identical then short circuit, around connecting to the opposite principle that then disconnects, be current output terminal 10 and current output terminal 14 short circuits, output for tightly coupled air reactor one arm, link to each other with a circuit breaker input 17, current output terminal 12 and current output terminal 16 short circuits, be the output of another arm of tightly coupled air reactor, link to each other with another circuit breaker input 19.Be connected into system's other end behind the circuit breaker output 18 of two circuit breakers in parallel, circuit breaker output 20 short circuits.
Inductance coil in sealing adopts the coiling of aluminium (copper) matter lead, is soaked into by epoxy resin after handling through certain external insulation, through solidifying to form integral body again.
Three-phase structure of the present utility model is independent, and every phase all comprises the gas-break switch of a both arms tightly coupled air reactor and two parallel connections, and these device parameters are identical, and the structure unanimity is so can illustrate its principle mutually by one.The circuit breaker in parallel that described device uses does not have class limitations, when electric pressure is low, can adopt the vacuum circuit-breaker that generally uses; And when electric pressure is higher, can adopt gas-break switchs such as widely used SF6.
In order to guarantee the current-sharing effect of described device, the asymmetric rate of impedance of the every arm of used tightly coupled air reactor is in 3%.When electric current flowed into release unit in parallel based on the both arms tightly coupled air reactor, two circuit breakers were born the normal current and the short circuit current of system jointly.Because the close coupling structure that adopts, each all can produce the opposite magnetic flux of direction in sealing tightly coupled air reactor.When system normally moves, because tightly coupled air reactor symmetrical configuration, coupling inductance externally shows with the form of leakage reactance, its value is very little, its loss can be ignored, and the circuit breaker parameters in parallel that links to each other with tightly coupled air reactor is also consistent, thereby has guaranteed that system power evenly flows through two arms and the circuit breaker in parallel of tightly coupled air reactor.
During system short-circuit fault, if flowing through the size of current of two circuit breakers in parallel equates, the magnetic flux equal and opposite in direction that two branch currents produce in tightly coupled air reactor two arms, direction is opposite, externally present leakage flux, tightly coupled air reactor only shows as leakage reactance in system, can not increase the burden of system; If size of current does not wait in two the road, then in tightly coupled air reactor two arms, can generate the electromotive force of alternation, by the law of electromagnetic induction as can be known, this electromotive force makes two branch currents be tending towards equal, when thereby this tightly coupled air reactor can guarantee system short-circuit fault, the circuit breaker of two branch roads is divided equally system power, and the model of this parallel connection circuit breaker should be in full accord, and can select parameters such as its rated capacity, short circuit current is 1/2nd of system parameters.
During system short-circuit fault, if the reasons such as inconsistent or separate unit circuit breaker failure of moving arc-extinguishing chamber of circuit breaker in parallel cause when having only a branch road conducting, tightly coupled air reactor presents the single armed reactance, than high 2～3 orders of magnitude of the leakage reactance under the close coupling state, can effectively limit the electric current that flows through tightly coupled air reactor single armed and separate unit arc-extinguishing chamber of circuit breaker.
Claims (7)
1. based on the parallel circuit breaker of tightly coupled air reactor, it is characterized in that: form by tightly coupled air reactor and circuit breaker in parallel, its connected mode is: the current input terminal of tightly coupled air reactor two arms is in the same side of reactor, and short circuit, by welding the system of being connected into mutually with terminal block, the current output terminal of two arms by with terminal block mutually postwelding be connected with two circuit breakers respectively, the other end short circuit of circuit breaker also is connected with system, thereby whole release unit series connection connecting system in parallel based on tightly coupled air reactor, tightly coupled air reactor output terminal block supports with post insulator, is fixed on the prefabricated platform.
2. the parallel circuit breaker based on tightly coupled air reactor according to claim 1 is characterized in that: circuit breaker in parallel is high-voltage large-capacity gas arc control device circuit breakers, totally two, and parallel connection.
3. the parallel circuit breaker based on tightly coupled air reactor according to claim 1, it is characterized in that: tightly coupled air reactor is cylinder type, is made of terminal block, post insulator and some individual layer inductance coils respectively.
4. tightly coupled air reactor according to claim 3 is characterized in that: all individual layer inductance coils are by solid conductor coiling or bundle conductor and around forming hierarchal arrangement, the interlayer turn-to-turn all has insulation, the coaxial arrangement of these inductance coils has a central shaft, and equal turn numbers.
5. tightly coupled air reactor according to claim 3, it is characterized in that: when electric current is flowed through all inductance coils, the magnetic direction of responding in the adjacent inductance coil is opposite, all induce the inductance coil parallel connection of magnetic direction in the same way, an arm that is equivalent to tightly coupled air reactor, the all individual layer inductance coil of each arm is around to identical, connection parallel with one another.
6. tightly coupled air reactor according to claim 3, it is characterized in that: each of tightly coupled air reactor layer have only same around to inductance coil, adjacent inductance coil around on the contrary, innermost layer with tightly coupled air reactor is a ground floor, outermost layer is last one deck meter, it between the ground floor and the second layer layer insulation pressure-resistant material, ground floor, insulating material and the second layer are one altogether and seal, also be that first is sealed, be heat radiation air air flue between sealing and sealing, by that analogy, sealing until outermost.
7. tightly coupled air reactor according to claim 3 is characterized in that: the tightly coupled air reactor inductance coil is an air-core inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202686299U CN201576636U (en) | 2009-10-29 | 2009-10-29 | Parallel-connection circuit breaker based on tightly-coupling hollow reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202686299U CN201576636U (en) | 2009-10-29 | 2009-10-29 | Parallel-connection circuit breaker based on tightly-coupling hollow reactor |
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| Publication Number | Publication Date |
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| CN201576636U true CN201576636U (en) | 2010-09-08 |
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| CN2009202686299U Expired - Lifetime CN201576636U (en) | 2009-10-29 | 2009-10-29 | Parallel-connection circuit breaker based on tightly-coupling hollow reactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814402B (en) * | 2009-10-29 | 2012-10-10 | 国网电力科学研究院 | Parallel type circuit breakers based on tightly coupled air reactor |
| CN105958431A (en) * | 2016-06-07 | 2016-09-21 | 广州供电局有限公司 | Protection device for limiting fault current on low voltage side of transformer |
| CN108597813A (en) * | 2018-07-10 | 2018-09-28 | 北京电力设备总厂有限公司 | The structure of close coupling split reactor |
-
2009
- 2009-10-29 CN CN2009202686299U patent/CN201576636U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814402B (en) * | 2009-10-29 | 2012-10-10 | 国网电力科学研究院 | Parallel type circuit breakers based on tightly coupled air reactor |
| CN105958431A (en) * | 2016-06-07 | 2016-09-21 | 广州供电局有限公司 | Protection device for limiting fault current on low voltage side of transformer |
| CN108597813A (en) * | 2018-07-10 | 2018-09-28 | 北京电力设备总厂有限公司 | The structure of close coupling split reactor |
| CN108597813B (en) * | 2018-07-10 | 2024-02-23 | 北京电力设备总厂有限公司 | Structure of tightly-coupled split reactor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID ELECTRIC POWER RESEARCH INSTITUTE HUAZH Free format text: FORMER OWNER: HUAZHONG SCINECE AND TECHNOLOGY UNIV Owner name: WUHAN NARI CO., LTD. OF STATE GRID ELECTRIC POWER Free format text: FORMER OWNER: STATE GRID ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20110616 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210003 NO. 8, NANRUI ROAD, NANJING CITY, JIANGSU PROVINCE TO: 430074 NO. 143, LUOYU ROAD, HONGSHAN DISTRICT, WUHAN CITY, HUBEI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110616 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Co-patentee after: State Grid Electric Power Research Insititute Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Co-patentee after: Huazhong University of Science and Technology Address before: Nanjing City, Jiangsu Province, 210003 South Shui Road No. 8 Co-patentee before: Huazhong University of Science and Technology Patentee before: State Grid Electric Power Research Insititute |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160721 Address after: 430074 Hubei city of Wuhan province Wuchang Luo Yu Road, No. 143 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee after: Huazhong University of Science and Technology Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee before: State Grid Electric Power Research Insititute Patentee before: Huazhong University of Science and Technology |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100908 |
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| CX01 | Expiry of patent term |