CN201536087U - Extra-high voltage circuit breaker - Google Patents
Extra-high voltage circuit breaker Download PDFInfo
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- CN201536087U CN201536087U CN2009201652011U CN200920165201U CN201536087U CN 201536087 U CN201536087 U CN 201536087U CN 2009201652011 U CN2009201652011 U CN 2009201652011U CN 200920165201 U CN200920165201 U CN 200920165201U CN 201536087 U CN201536087 U CN 201536087U
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- circuit breaker
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- 230000007246 mechanism Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000002265 prevention 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
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Abstract
The utility model discloses an extra-high voltage circuit breaker and an extra-high voltage over-power prevention system, wherein the circuit breaker is provided with a resistance circuit, which comprises a sub gate resistance, a sub gate fracture, and a main fracture of the circuit breaker, wherein the sub gate resistance and the sub gate fracture are connected in serials into the resistance circuit, and the main fracture of the resistance circuit and the main fracture of the sub gate circuit breaker are connected in parallel to form the circuit breaker with the sub gate resistance. Since the sub gate resistance and the sub gate fracture are added and the sub gate fracture is arranged into a delay sub gate relative to the main fracture, the utility model limits the over-voltage operation when the extra-high voltage circuit breaker carries out the sub gate operation. Further, the utility model can be matched with an arrester to combine an extra-high voltage over-power prevention system, and more effectively limits the over-voltage of the sub gate operation of the extra-high voltage circuit breaker.
Description
Technical field
The utility model relates to the extra-high voltage grid field, relates in particular to the circuit breaker in the extra-high voltage grid.
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.
The utility model content
In view of this, the purpose of the utility model embodiment is to provide a kind of breaker in extra high voltage, comes more effectively to limit the gate-dividing super-voltage of breaker in extra high voltage.
For achieving the above object, the utility model 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, in the utility model embodiment, set up the sub-gate resistance and the sub-gate resistance fracture device that are connected in parallel with main fracture, 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 utility model embodiment 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 embodiment more of the present utility model, 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 utility model embodiment one;
The sub-gate resistance fracture connection status schematic diagram that Fig. 2 a is provided for the utility model embodiment one;
The sub-gate resistance fracture separated position schematic diagram that Fig. 2 b is provided for the utility model embodiment one;
Separating brake circuit first view during sub-switching operation that Fig. 3 a is provided for the utility model embodiment one;
Separating brake circuit second view during sub-switching operation that Fig. 3 b is provided for the utility model embodiment one;
The schematic diagram that circuit breaker that Fig. 4 is provided for the utility model embodiment two and lightning arrester are united use.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of anti-overvoltage system and has been 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 shown in Fig. 2 a and Fig. 2 b.
Fig. 3 a and Fig. 3 b are the sub-switching operation process schematic diagram of band sub-gate resistance circuit breaker.When separating brake, shown in Fig. 3 a, 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.Shown in Fig. 3 b, adjust valve by using time-delay, 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.
In the utility model, 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 utility model, 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 utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (9)
1. a 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. the 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 |
|---|---|---|---|
| CN2009201652011U CN201536087U (en) | 2009-07-01 | 2009-07-01 | Extra-high voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201652011U CN201536087U (en) | 2009-07-01 | 2009-07-01 | Extra-high voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201536087U true CN201536087U (en) | 2010-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201652011U Expired - Lifetime CN201536087U (en) | 2009-07-01 | 2009-07-01 | Extra-high voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201536087U (en) |
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2009
- 2009-07-01 CN CN2009201652011U patent/CN201536087U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100728 |