CN101635221A - Extra-high voltage breaker and extra-high over-voltage preventing system with same - Google Patents
Extra-high voltage breaker and extra-high over-voltage preventing system with same Download PDFInfo
- Publication number
- CN101635221A CN101635221A CN200910146235A CN200910146235A CN101635221A CN 101635221 A CN101635221 A CN 101635221A CN 200910146235 A CN200910146235 A CN 200910146235A CN 200910146235 A CN200910146235 A CN 200910146235A CN 101635221 A CN101635221 A CN 101635221A
- Authority
- CN
- China
- Prior art keywords
- fracture
- extra
- breaker
- voltage
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000000452 restraining effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Abstract
The invention discloses an extra-high voltage breaker and an extra-high over-voltage preventing system. The extra-high voltage breaker is provided with a resistive circuit and comprises a brake-separating resistor, a brake-separating fracture and a main fracture of a breaker of the brake-separating fracture, wherein the brake-separating resistor is connected with the brake-separating fracture in series to form the resistive circuit; and the resistive circuit is connected in parallel with the main fracture of the breaker of the brake-separating fracture to form the breaker with the brake-separating resistor. The invention plays the roles of restraining the operation over-voltage during the brake-separating operation of the extra-high voltage breaker by adding the brake-separating resistor and the brake-separating fracture; and in addition, the invention is further matched with an arrester device for use so as to form the extra-high over-voltage preventing system, thereby more effectively restraining the brake-separating operation over-voltage of the extra-high voltage breaker.
Description
Technical field
The present invention relates to the extra-high voltage grid field, relate in particular to circuit breaker and extra-high over-voltage preventing electric system in the extra-high voltage grid with this circuit breaker.
Background technology
Ultra high voltage english abbreviation UHV.In China, ultra high voltage is meant the electric pressure that exchanges 1000 kilovolts and direct current ± 800 kilovolt.The extra-high-speed pressure energy promotes the conveying capacity of China's electrical network greatly.The data that provide according to State Grid Corporation of China show that a loop extra-high voltage direct-current electrical network can send 6,000,000 kilowatts of electric weight, are equivalent to 5 to 6 times of existing 500 Kilovolt Direct Current nets, and to send electrical distance also be 2 to 3 times of the latter, so efficient improves greatly.In addition,, carry the electric weight of same power according to State Grid Corporation of China's measuring and calculating, can be if adopt extra high voltage line to transmit electricity than the land resource that adopts 500 kilovolts of supertension lines savings 60%.
The overvoltage of electric power system is meant because internal fault, switching manipulation or be struck by lightning, and causes the instantaneous or long-term voltage that is higher than the specified permission voltage of electrical network and may causes electric device to damage to raise.Wherein fault or moment in when operation take place be called switching overvoltage.Overvoltage can constitute a threat to electric grid operating and related work personnel's life security, also can cause great destruction to grid equipment simultaneously.Because magnitude of voltage is higher, and therefore, the destruction that the overvoltage in the extra-high voltage grid causes can be more serious, loss also can be bigger in the extra-high voltage grid environment.The insulation breakdown of electric line and electric equipment also may take place, and the normal operation of electric power system is wrecked.In order to guarantee the safe operation of electric power system, must take various technical safety measuress conscientiously, carry out overvoltage protection, so that the harm that overvoltage causes drops to bottom line.
At present, on over-voltage mode on the circuit breaker, adopted the structural design that switching-on resistance is set on arc control device, the switching overvoltage that this design can only limiting circuit breaker produces, the overvoltage that produces in the time of can not the limiting circuit breaker separating brake when closing a floodgate.
Can partly limit the switching overvoltage that separating brake produces though the mode of lightning arrester is set in transmission line, lightning arrester is arranged in the transmission line, and lightning arrester restriction switching overvoltage mainly is to be used in the following circuit of superhigh pressure voltage grade.For extra high voltage line, lightning arrester mainly plays anti-lightning strike effect, be mainly used in the tripping rate with lightning strike that reduces transmission line, and be not the effect of mainly playing the restriction switching overvoltage, therefore can not guarantee completely gate-dividing super-voltage to be limited in require below horizontal.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is a kind of breaker in extra high voltage is provided and the extra-high over-voltage preventing electric system with this circuit breaker, comes more effectively to limit the gate-dividing super-voltage of breaker in extra high voltage.
For achieving the above object, the invention provides following technical scheme: a kind of breaker in extra high voltage, comprise sub-gate resistance, separating brake fracture, main fracture and operating mechanism, wherein:
Described sub-gate resistance and the separating brake fracture composition resistance circuit that is connected in series;
Described resistance circuit and main fracture are connected in parallel;
Described operating mechanism connects described separating brake fracture and main fracture, and described separating brake fracture is disconnected than described main fracture time-delay.
Preferably, described resistance circuit and described main fracture fixation connect as one.
Preferably, described resistance circuit connects as one by insulate support and flange and described main fracture fixation.
Preferably, described sub-gate resistance is connected in series by resistor disc and forms.
Preferably, described operating mechanism is adjusted valve for time-delay.
Preferably, described time-delay design duration is 30ms.
A kind of extra-high over-voltage preventing electric system with breaker in extra high voltage is characterized in that described breaker in extra high voltage comprises sub-gate resistance, separating brake fracture, main fracture and operating mechanism, wherein:
Described sub-gate resistance and the separating brake fracture composition resistance circuit that is connected in series;
Described resistance circuit and main fracture are connected in parallel.
Described operating mechanism connects described fracture of separating brake and main fracture, and described separating brake fracture is disconnected than described main fracture time-delay.
Preferably, with in the transmission line that described circuit breaker links to each other be equiped with the lightning arrester that is used to limit switching overvoltage.
Preferably, in the transmission line at described circuit breaker two ends, all be equiped with the lightning arrester that is used to limit switching overvoltage.
From technique scheme as seen, set up the sub-gate resistance and the sub-gate resistance fracture device that are connected in parallel with main fracture in embodiments of the present invention, and, by operating mechanism the resistance fracture is disconnected than main fracture time-delay.Make thus, between described time delay, because the recovery voltage of main circuit is mainly by being applied on the sub-gate resistance with main fracture parallel resistor circuit, thereby reduced main fracture and born superpotential burden, and mainly discharged energy, thereby played the effect that has suppressed the switching overvoltage of breaker in extra high voltage when sub-switching operation by sub-gate resistance;
In addition, by insulation support and flange with resistance circuit with lead to open circuit and be fixed together, make the breaker structure compactness, thereby effectively dwindled the volume of described circuit breaker, made things convenient for the installation and the use of circuit breaker;
In addition, described circuit breaker and lightning arrester are united use, form the extra-high over-voltage preventing electric system of dual overvoltage protection.The effect of anti-overvoltage is further strengthened.Thereby can more effectively guarantee the normal operation of extra-high voltage grid system and protection relevant device and personnel's safety.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The circuit breaker schematic diagram of the band breaking resistor that Fig. 1 is provided for the embodiment of the invention one;
The sub-gate resistance fracture schematic diagram that Fig. 2 is provided for the embodiment of the invention one;
Work preface schematic diagram during sub-switching operation that Fig. 3 is provided for the embodiment of the invention one;
The schematic diagram that circuit breaker that Fig. 4 is provided for the embodiment of the invention two and lightning arrester are united use.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The invention provides a kind of anti-overvoltage system and be applied to the breaker in extra high voltage of this system.
Embodiment one
As shown in Figure 1, embodiment provides a kind of circuit breaker, and this circuit breaker is equiped with resistance circuit, can effectively limit the switching overvoltage when doing sub-switching operation.
In 1100 kilovolts power grid environment, be provided with the circuit breaker that has sub-gate resistance.Described circuit breaker comprises main circuit 1 and resistance circuit 2.Resistance circuit 2 is connected in parallel on the main circuit 1, and described resistance circuit 2 is made up of sub-gate resistance 21 and resistance fracture 22 polyphones.Sub-gate resistance 21 is to be made up of the resistor disc of 40 polyphones, series connection back one phase circuit breaker with the total resistance of resistance be 600 Ω.Described resistance fracture makes moving contact 42 and fixed contact 41 finish by actuating insulated tension pole 4 and is connected and the action that separates as shown in Figure 2.
Fig. 3 is the sub-switching operation process schematic diagram of band sub-gate resistance circuit breaker.When separating brake, disconnect main fracture 51 earlier, main circuit 5 is disconnected.This moment, resistance circuit 6 was a power-on circuit.In main fracture 51 is disconnected to the period of separating brake fracture 61 disconnections, because the recovery voltage of main circuit is mainly by being applied on the sub-gate resistance with main fracture 51 parallel resistor circuit 6, thereby reduced main fracture 51 and born superpotential burden, and mainly discharged energy, thereby played the effect that has suppressed the switching overvoltage of breaker in extra high voltage when sub-switching operation by sub-gate resistance.By using time-delay to adjust valve, off resistance fracture 61 after main fracture 51 disconnects 30ms disconnects sub-gate resistance circuit 6.So far, sub-switching operation is finished.
Embodiment two
Preferably, as shown in Figure 1, in embodiment one described band sub-gate resistance circuit breaker, the two ends of sub-gate resistance circuit 2 respectively with insulation support 23 and conductor assembling 3 open circuit by flange and the master of circuit breaker and 1 be connected and be fixed together.The weight that is used for bearing resistance is supported in insulation, because the weight of described resistance is heavier, will select the higher backing material of compression strength so select for use to insulate when supporting here.By integrated design with resistance circuit and main fracture, make the compact conformation of circuit breaker, smaller volume helps using and installing more.
Embodiment three
As shown in Figure 4, embodiment provides a kind of extra-high over-voltage preventing electrical voltage system, this system has band sub-gate resistance circuit breaker, this resistance breaker is identical with the foregoing description one or embodiment two described circuit breakers, and is equiped with the lightning arrester 7 that is used to limit switching overvoltage in the transmission line at two ends in the described circuit breaker.When sub-switching operation, described lightning arrester 7 uses simultaneously with the described circuit breaker that has sub-gate resistance, when the sub-switching operation overvoltage forms, forms the extra-high over-voltage preventing electrical voltage system with dual operation overvoltage Limiting function.Thereby more effectively limit switching overvoltage.
Among the present invention, parallel connection has resistance circuit in the circuit breaker in the ultra high voltage circuit, and is connected in series the separating brake fracture on breaking resistor.When doing open-circuit operation, be to disconnect main fracture under the situation of path to postpone to disconnect the separating brake fracture then what keep resistance circuit earlier.By above-mentioned device and operating sequence, when main fracture disconnects,, be in channel status so be disconnected to separating brake fracture off period circuit at main fracture because described separating brake fracture postpones to disconnect.Because the recovery voltage of main circuit mainly by being applied on the sub-gate resistance with main fracture parallel resistor circuit, bears superpotential burden thereby reduced main fracture, and has mainly discharged energy by sub-gate resistance.Also just effectively limited switching overvoltage by this.In the present invention, by insulation support and flange with the sub-gate resistance circuit with lead the design of opening circuit and being fixed together, make the compact conformation of circuit breaker, reduced the volume of circuit breaker.Further, unite use, form extra-high over-voltage preventing electric system with duplicate protection by the technical scheme of using lightning arrester to limit switching overvoltage in scheme among the embodiment one and the prior art.Make the switching overvoltage restriction effect of ultra high voltage further strengthen.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1, a kind of breaker in extra high voltage is characterized in that, comprises sub-gate resistance, separating brake fracture, main fracture and operating mechanism, wherein:
Described sub-gate resistance and the separating brake fracture composition resistance circuit that is connected in series;
Described resistance circuit and main fracture are connected in parallel;
Described operating mechanism connects described separating brake fracture and main fracture, and described separating brake fracture is disconnected than described main fracture time-delay.
2, according to the described circuit breaker of claim 1, it is characterized in that: described resistance circuit and described main fracture fixation connect as one.
3, according to the described circuit breaker of claim 2, it is characterized in that: described resistance circuit connects as one by insulate support and flange and described main fracture fixation.
4, according to the described circuit breaker of claim 1, it is characterized in that: described sub-gate resistance is connected in series by resistor disc and forms.
5, according to the described circuit breaker of claim 1, it is characterized in that: described operating mechanism is adjusted valve for time-delay.
6, according to the described circuit breaker of claim 5, it is characterized in that: described time-delay design duration is 30ms.
7, a kind of extra-high over-voltage preventing electric system with breaker in extra high voltage is characterized in that, described breaker in extra high voltage comprises sub-gate resistance, separating brake fracture, main fracture and operating mechanism, wherein:
Described sub-gate resistance and the separating brake fracture composition resistance circuit that is connected in series;
Described resistance circuit and main fracture are connected in parallel.
Described operating mechanism connects described fracture of separating brake and main fracture, and described separating brake fracture is disconnected than described main fracture time-delay.
8, according to the described extra-high over-voltage preventing electric system of claim 7, it is characterized in that: be equiped with the lightning arrester that is used to limit switching overvoltage in the transmission line that described circuit breaker links to each other.
9, described according to Claim 8 extra-high over-voltage preventing electric system is characterized in that: all be equiped with the lightning arrester that is used to limit switching overvoltage in the transmission line at described circuit breaker two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910146235A CN101635221A (en) | 2009-06-24 | 2009-06-24 | Extra-high voltage breaker and extra-high over-voltage preventing system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910146235A CN101635221A (en) | 2009-06-24 | 2009-06-24 | Extra-high voltage breaker and extra-high over-voltage preventing system with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101635221A true CN101635221A (en) | 2010-01-27 |
Family
ID=41594372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910146235A Pending CN101635221A (en) | 2009-06-24 | 2009-06-24 | Extra-high voltage breaker and extra-high over-voltage preventing system with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101635221A (en) |
Cited By (3)
| 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 |
| CN105957778A (en) * | 2016-06-01 | 2016-09-21 | 中国西电电气股份有限公司 | Connection structure of SF6 breaker closing resistor and explosion chamber |
| CN114783816A (en) * | 2021-12-23 | 2022-07-22 | 平高集团有限公司 | Circuit breaker |
-
2009
- 2009-06-24 CN CN200910146235A patent/CN101635221A/en active Pending
Cited By (5)
| 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 |
| CN105957778A (en) * | 2016-06-01 | 2016-09-21 | 中国西电电气股份有限公司 | Connection structure of SF6 breaker closing resistor and explosion chamber |
| CN105957778B (en) * | 2016-06-01 | 2018-02-23 | 中国西电电气股份有限公司 | A kind of attachment structure of SF6 breaker closings resistance and arc-chutes |
| CN114783816A (en) * | 2021-12-23 | 2022-07-22 | 平高集团有限公司 | Circuit breaker |
| CN114783816B (en) * | 2021-12-23 | 2024-02-23 | 平高集团有限公司 | Circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103208788B (en) | Intelligent Dynamic power network neutral point earthing method and the complete sets of equipment | |
| US9054557B2 (en) | Voltage balancing of symmetric HVDC monopole transmission lines after earth faults | |
| CN105680411A (en) | DC solid state circuit breaker and broken circuit control method | |
| CN203800578U (en) | High-voltage direct-current circuit breaker | |
| CN202651781U (en) | Neutral point integrated grounding complete device | |
| CN2884641Y (en) | Overvoltage limit and small current earthing selective integrator of power transfer and distribution system | |
| CN203895978U (en) | Neutral ground protection system used for medium-voltage power grid | |
| CN201699161U (en) | Contact-type ground bar | |
| CN202353174U (en) | Combined protector of high-voltage current limiting fuse | |
| CN206533122U (en) | A kind of high-voltage and current-limitation device based on current limliting zinc oxide FR | |
| CN101635221A (en) | Extra-high voltage breaker and extra-high over-voltage preventing system with same | |
| CN201478821U (en) | Overvoltage protector for indirect neutral point-grounding power system in three-phase power grid | |
| CN108448551A (en) | A kind of exchange current limiter and its current-limiting method | |
| CN209184242U (en) | It is a kind of to dispatch controllable power network neutral point earthing or grounding means | |
| CN206628823U (en) | A kind of FSR high capacity and high speed switchgearses | |
| CN102290805A (en) | Electric arc grounding overvoltage limiting device applied to medium-voltage distribution system | |
| CN201536087U (en) | Extra-high voltage circuit breaker | |
| CN109038531A (en) | It is a kind of to dispatch controllable power network neutral point earthing or grounding means and its control method | |
| CN106921149A (en) | A kind of FSR high capacity and high speed switchgearses | |
| CN101055989A (en) | Virtual grounding power transmission and distribution system | |
| CN210693223U (en) | Voltage transformer isolation combination device applied to uninterrupted operation | |
| CN204012700U (en) | Power network neutral point grounding system | |
| CN206697931U (en) | A kind of arc-extinguishing harmonic-eliminating and overvoltage protection | |
| CN206850417U (en) | One kind is based on LC parallel resonance depth current-limiting apparatus | |
| CN2556830Y (en) | Short-circuit current combined limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20100127 |