CN202275787U - Three-fracture series type high voltage DC breaker - Google Patents
Three-fracture series type high voltage DC breaker Download PDFInfo
- Publication number
- CN202275787U CN202275787U CN2011203812173U CN201120381217U CN202275787U CN 202275787 U CN202275787 U CN 202275787U CN 2011203812173 U CN2011203812173 U CN 2011203812173U CN 201120381217 U CN201120381217 U CN 201120381217U CN 202275787 U CN202275787 U CN 202275787U
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- fracture
- phase
- breaker
- circuit
- control device
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- 230000010355 oscillation Effects 0.000 claims abstract description 26
- 238000013016 damping Methods 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims description 31
- 239000003990 capacitor Substances 0.000 claims description 8
- 239000012212 insulator Substances 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Abstract
The utility model provides a three-fracture series type high voltage DC breaker, comprising a three-phase breaker, an oscillation loop and a lightning arrester. The three-phase breaker comprises three single-phase breakers, the fractures of the three single-phase breakers are in series connections orderly via connecting buses, the three-phase breaker is in parallel connections with the oscillation loop and the lightning arrester separately, and the fracture of each single-phase breaker is in parallel connection with an RC voltage-sharing loop. In the utility model, by making the fractures of the three single-phase breakers in series connections to form a three-fracture series structure, the three-fracture series type high voltage DC breaker has the effects of high drop-out voltage, large drop-out current, short break time, etc., can fully satisfy the requirements of the ultrahigh voltage and extra-high voltage DC power transmission engineering. In addition, the oscillation loop in the utility model is used to generate an oscillation current, the lightning arrester is used to absorb circuit energy and limit overvoltage after the current is cut, and an RC damping loop is used to improve the voltage-sharing between the fractures of the single-phase breakers.
Description
Technical field
The utility model belongs to the high-voltage dc transmission electrical domain, is specifically related to a kind of three fracture tandem HVDC circuit breakers.
Background technology
In ultra, extra-high voltage direct-current transmission engineering, dc circuit breaker is one of vital equipment.Ultra, extra-high voltage direct-current transmission engineering electric pressure high, transmission capacity is big, therefore in case break down, the AC system that direct current system itself is connected with it all produces significant impact, therefore must in time excise the fault point.The dc circuit breaker action response is fast, can reduce trouble duration to greatest extent, reduces the impact to the AC/DC transmission system of fault.Yet ultra, extra-high voltage direct-current transmission engineering electric pressure improves constantly, and drop-out current requires increasingly high, and transmission capacity constantly increases, and correspondingly the connecting-disconnecting function to dc circuit breaker requires also to improve constantly.Traditional single break dc circuit breaker connecting-disconnecting function is difficult to improve again, therefore, needs ultra in order to satisfy, the extra-high voltage direct-current transmission engineering, the utility model proposes a kind of multi-break cascaded structure dc circuit breaker with the equal hydraulic circuit of RC damping.
The utility model content
In order to overcome the above-mentioned defective of prior art, the purpose of the utility model is to propose a kind of three fracture tandem HVDC circuit breakers with advantages such as drop-out voltage height, drop-out current are big, switch off time is short.
The three fracture tandem HVDC circuit breakers of the utility model are realized through following technical scheme:
A kind of three fracture tandem HVDC circuit breakers; This dc circuit breaker comprises three-phase breaker, oscillation circuit and lightning arrester; Said three-phase breaker comprises three single-phase circuit breakers; Connect successively through connection bus between the fracture of three single-phase circuit breakers, said three-phase breaker is in parallel with oscillation circuit and lightning arrester respectively, and the incision position of each single-phase circuit breaker is parallel with the equal hydraulic circuit of a RC respectively.
Wherein, said oscillation circuit comprises the inductance L and the capacitor C of mutual series connection.
Wherein, said equal hydraulic circuit comprises the damping capacitor Cs and the damping resistance Rs of mutual series connection.
Wherein, Said single-phase circuit breaker comprises arc control device, post insulator, operating mechanism case and outlet board; Said arc control device are fixed on the operating mechanism case through post insulator; The upper/lower terminal of said arc control device is respectively equipped with an outlet board, is provided with fracture that is formed by dynamic and static contact and the equal hydraulic circuit of RC that is in parallel with this fracture in the said arc control device, and an end of the connection bus of drawing in the moving contact in the arc control device and the outlet board is electrically connected; One end of the connection bus of drawing in the fixed contact in the arc control device and another outlet board is electrically connected, and said moving contact receives the operating mechanism in the operating mechanism case to drive, realize the synchronous switching off of fracture.
Wherein, all be filled with the SF that is used for arc extinguishing in the arc control device of said each single-phase circuit breaker
6Gas.
Wherein, the operating mechanism in the said operating mechanism case adopts permanent magnet mechanism, spring operating mechanism, hydraulic mechanism or pneumatic mechanism.
The beneficial effect of the utility model is:
Effects such as 1) dc circuit breaker of the utility model adopts the fracture series connection of three single-phase circuit breakers to constitute three fracture cascaded structures, has the drop-out voltage height, and drop-out current is big, switch off time is short can satisfy needs ultra, the extra-high voltage direct-current transmission engineering fully; In addition, the oscillation circuit in the utility model is used to produce oscillating current; Lightning arrester in the utility model, being used for having no progeny at the electric current branch absorbs circuit energy and over-voltage; RC damping circuit in the utility model is used to improve all pressures between the fracture of each single-phase circuit breaker.
2) dc circuit breaker of the utility model adopts the sulfur hexafluoride gas arc extinguishing, and the arc extinguishing ability is strong; The utility model employing operating mechanism is controlled each single-phase circuit breaker of mutual series connection and is cut-off simultaneously, and the action synchronism is good.
Description of drawings
Fig. 1 is the circuit theory diagrams of the three fracture tandem HVDC circuit breakers of the utility model;
Fig. 2 is the syndeton sketch map of three fractures;
Among the figure, 1-arc control device, 2-post insulator, 3-operating mechanism case, 4-outlet board, 5-connection bus.
Embodiment
Below in conjunction with accompanying drawing the three fracture tandem HVDC circuit breakers of the utility model are done further detailed explanation.
The three fracture tandem HVDC circuit breakers of the utility model adopt the direct current of passive superposition oscillating current to cut-off mode, force electric current to produce zero crossing, and finally reach the purpose of electric current disjunction.Its structure is as shown in Figure 1, and this dc circuit breaker mainly is made up of three parts: 1. multi-break circuit breaker; 2. oscillation circuit; 3. dissipative cell (lightning arrester), the multi-break circuit breaker is in parallel with oscillation circuit and dissipative cell respectively.
Three-phase breaker in this example can adopt by three single-phase circuit breakers among Fig. 2 and be in series, and it has the advantage that drop-out voltage height, drop-out current are big, switch off time is short, can satisfy operating mode demand ultra, the extra-high voltage direct-current transmission engineering fully; Also can adopt interchange three-phase breaker ripe in the prior art, its mode of connection is simpler, more reliable and standardization.The effect of each fracture is the disjunction that realizes electric current at the superposition current over-zero constantly in this three-phase breaker.As shown in Figure 2; Each single-phase circuit breaker includes arc control device 1, post insulator 2, operating mechanism case 3 and outlet board 4, and arc control device 1 are fixed on the operating mechanism case 3 through post insulator 2, and the upper/lower terminal of arc control device is respectively equipped with an outlet board 4; Be provided with fracture that forms by dynamic and static contact and the equal hydraulic circuit of RC that is in parallel with this fracture in the arc control device; The equal hydraulic circuit of RC is made up of the damping capacitor Cs and the damping resistance Rs of mutual series connection, adopts the RC damping circuit all to press between three fractures, avoids three fractures to bear different overvoltage; It is too big to cause wherein certain fracture to bear overvoltage numerical value, causes arc reignition or loss fracture equipment between fracture.One end of the connection bus 5 of drawing in the moving contact in the arc control device and the outlet board is electrically connected; One end of the connection bus 5 of drawing in the fixed contact in the arc control device and another outlet board is electrically connected; The other end of this connection bus stretches in the outlet board of next single-phase circuit breaker and with the moving contact of this single-phase circuit breaker again and is electrically connected; So repeatedly; Promptly realize the series connection of each fracture in three single-phase circuit breakers, be parallel with oscillation circuit and dissipative cell between connection bus 5 free ends of in the outlet board 4 of two single-phase circuit breakers of outermost, drawing, realized that three-phase breaker and oscillation circuit, dissipative cell are in parallel through connection bus 5.All be filled with SF in the arc control device 1 of each single-phase circuit breaker
6Gas carries out arc extinguishing, makes circuit breaker have stronger arc extinguishing ability.Moving contact in each single-phase circuit breaker receives the operating mechanism in the operating mechanism case 3 to drive, realize the synchronous switching off of fracture, and the action synchronism is good, and this operating mechanism can adopt permanent magnet mechanism, spring operating mechanism, hydraulic mechanism or pneumatic mechanism.
Oscillation circuit in this example adopts the LC oscillation circuit that is made up of inductance L, capacitor C series connection usually, and it is used to produce oscillating current, and R representes the equivalent resistance in this oscillation circuit among Fig. 2.
Dissipative cell in this example generally adopts lightning arrester, is good to select metal oxide arrester MOV for use especially, and it is used for having no progeny at the electric current branch and absorbs circuit energy and over-voltage.
The detailed process of dc circuit breaker disjunction direct current is following: 1. force the current over-zero stage: begin separately at this stage fracture; The fracture two ends produce electric arc; Arc voltage is added on the oscillation circuit, and oscillation circuit produces positive and negative increasing oscillation electric current, and this oscillating current superposition is on the direct current of fracture; Along with the increase of oscillating current amplitude, the superposition electric current produces zero crossing on the fracture.2. fracture medium recovery stage: fracture is in the zero crossing blow-out of superposition electric current, and fracture separates fully.3. energy absorption stage: fracture fully separately after; External current is to the capacitor charging of oscillation circuit; When oscillation circuit voltage reaches the operation voltage of metal oxide arrester; The lightning arrester conducting consumes the energy that line inductance and tank capacitor are stored, and finally realizes the complete disjunction of direct current.
Multi-break circuit breaker employing multi-break cascaded structure is a vital part in the utility model.Because the electric arc of each fracture is negative resistance character, arc voltage increases with electric current and descends, and institute is superimposed on the fracture arc current so that oscillation circuit produces the increasing oscillation electric current, makes direct current produce zero crossing.The dc circuit breaker of available technology adopting single break structure, the arc voltage of its fracture is relatively low, breaking capacity a little less than, be not suitable for the big electric current of disjunction.Utility model people is through evidence; Owing to adopt three fracture cascaded structures in this example; So on each fracture, just can produce higher arc voltage in the interrupting process, so oscillation circuit oscillating current amplitude gathers way soon, the superposition current over-zero of fracture is rapid; It is easier to cut-off big electric current, promptly can satisfy the needs of extra-high voltage direct-current transmission.Higher if desired arc voltage requirement can increase single-phase circuit breaker according to the actual requirements again, forms the multi-break circuit breaker.
Should be noted that at last: above embodiment only in order to the explanation the utility model technical scheme but not to its restriction; Although the utility model has been carried out detailed explanation with reference to the foregoing description; Under the those of ordinary skill in field be to be understood that: still can make amendment or be equal to replacement the embodiment of the utility model; And do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (6)
1. fracture tandem HVDC circuit breaker; This dc circuit breaker comprises three-phase breaker, oscillation circuit and lightning arrester; It is characterized in that: said three-phase breaker comprises three single-phase circuit breakers; Connect successively through connection bus (5) between the fracture of three single-phase circuit breakers, said three-phase breaker is in parallel with oscillation circuit and lightning arrester respectively, and the incision position of each single-phase circuit breaker is parallel with the equal hydraulic circuit of a RC respectively.
2. three fracture tandem HVDC circuit breakers as claimed in claim 1, it is characterized in that: said oscillation circuit comprises the inductance L and the capacitor C of mutual series connection.
3. three fracture tandem HVDC circuit breakers as claimed in claim 1, it is characterized in that: said equal hydraulic circuit comprises the damping capacitor Cs and the damping resistance Rs of mutual series connection.
4. three fracture tandem HVDC circuit breakers as claimed in claim 1; It is characterized in that: said single-phase circuit breaker comprises arc control device (1), post insulator (2), operating mechanism case (3) and outlet board (4); Said arc control device (1) are fixed on the operating mechanism case (3) through post insulator (2); The upper/lower terminal of said arc control device is respectively equipped with an outlet board (4); Be provided with fracture that forms by dynamic and static contact and the equal hydraulic circuit of RC that is in parallel with this fracture in the said arc control device (1); One end of the connection bus (5) of drawing in the moving contact in the arc control device and the outlet board is electrically connected, and an end of the connection bus (5) of drawing in the fixed contact in the arc control device and another outlet board is electrically connected, and said moving contact receives the operating mechanism in the operating mechanism case (3) to drive, realize the synchronous switching off of fracture.
5. three fracture tandem HVDC circuit breakers as claimed in claim 4, it is characterized in that: the arc control device of said each single-phase circuit breaker all are filled with the SF that is used for arc extinguishing in (1)
6Gas.
6. three fracture tandem HVDC circuit breakers as claimed in claim 4 is characterized in that: the operating mechanism in the said operating mechanism case (3) adopts permanent magnet mechanism, spring operating mechanism, hydraulic mechanism or pneumatic mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203812173U CN202275787U (en) | 2011-09-30 | 2011-09-30 | Three-fracture series type high voltage DC breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203812173U CN202275787U (en) | 2011-09-30 | 2011-09-30 | Three-fracture series type high voltage DC breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202275787U true CN202275787U (en) | 2012-06-13 |
Family
ID=46196129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203812173U Expired - Lifetime CN202275787U (en) | 2011-09-30 | 2011-09-30 | Three-fracture series type high voltage DC breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202275787U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117188A (en) * | 2013-01-17 | 2013-05-22 | 国网智能电网研究院 | High-speed switch for direct current breaker |
| WO2013189173A1 (en) * | 2012-06-18 | 2013-12-27 | 国家电网公司 | Resistance device for high-voltage circuit-breaker, and high-voltage circuit breaker |
| CN104810200A (en) * | 2015-05-19 | 2015-07-29 | 成都恒科瑞恩智能电气科技有限公司 | Super-quick vacuum switch device |
| CN105244208A (en) * | 2015-08-31 | 2016-01-13 | 国家电网公司 | Multi-break high-voltage direct current breaker |
| CN108933065A (en) * | 2018-06-20 | 2018-12-04 | 国网山东省电力公司滨州市沾化区供电公司 | A kind of dc circuit breaker separating brake structure |
| CN109036951A (en) * | 2018-08-29 | 2018-12-18 | 浙江紫光电器有限公司 | A kind of module of multi-break high-voltage circuitbreaker |
-
2011
- 2011-09-30 CN CN2011203812173U patent/CN202275787U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013189173A1 (en) * | 2012-06-18 | 2013-12-27 | 国家电网公司 | Resistance device for high-voltage circuit-breaker, and high-voltage circuit breaker |
| CN103117188A (en) * | 2013-01-17 | 2013-05-22 | 国网智能电网研究院 | High-speed switch for direct current breaker |
| CN104810200A (en) * | 2015-05-19 | 2015-07-29 | 成都恒科瑞恩智能电气科技有限公司 | Super-quick vacuum switch device |
| CN105244208A (en) * | 2015-08-31 | 2016-01-13 | 国家电网公司 | Multi-break high-voltage direct current breaker |
| CN108933065A (en) * | 2018-06-20 | 2018-12-04 | 国网山东省电力公司滨州市沾化区供电公司 | A kind of dc circuit breaker separating brake structure |
| CN109036951A (en) * | 2018-08-29 | 2018-12-18 | 浙江紫光电器有限公司 | A kind of module of multi-break high-voltage circuitbreaker |
| CN109036951B (en) * | 2018-08-29 | 2024-04-16 | 浙江紫光电器有限公司 | Module of multi-fracture high-voltage circuit breaker |
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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: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140324 Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140324 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140324 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |