CN204167900U - A kind of shunt capacitor switch restoring over-voltage suppresses circuit - Google Patents
A kind of shunt capacitor switch restoring over-voltage suppresses circuit Download PDFInfo
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- CN204167900U CN204167900U CN201420701742.2U CN201420701742U CN204167900U CN 204167900 U CN204167900 U CN 204167900U CN 201420701742 U CN201420701742 U CN 201420701742U CN 204167900 U CN204167900 U CN 204167900U
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- Prior art keywords
- circuit
- capacitor
- inhibitor
- circuit breaker
- voltage
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- 239000003990 capacitor Substances 0.000 title claims abstract description 119
- 239000003112 inhibitor Substances 0.000 claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000005611 electricity Effects 0.000 claims abstract description 8
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 8
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 5
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model discloses a kind of shunt capacitor switch restoring over-voltage and suppress circuit, this circuit comprises three-phase alternating current conveying circuit, each cross streams electricity conveying circuit comprises alternating-current voltage source, circuit breaker and the Capacitor banks of connecting successively respectively, Capacitor banks comprises N number of capacitor of connecting successively, N be not less than 1 positive integer; Each cross streams electricity conveying circuit also comprises in parallel with Capacitor banks, the inhibitor of direct voltage residual in releasing capacitor group.The utility model makes when circuit breaker disconnects Capacitor banks, the iron core of inhibitor is saturated fast, residual charge on Capacitor banks is discharged fast by inhibitor, reduce the restoring over-voltage at circuit breaker two ends, improve the reliability of circuit breaker, avoid the probability that circuit breaker is restriked, ensure that the normal operation of Shunt Capacitor Unit device, also ensure that the normal operation of alternating current conveying system.
Description
Technical field
The utility model relates to power supply conveying system technical field, particularly relates to a kind of shunt capacitor switch restoring over-voltage and suppresses circuit.
Background technology
Shunt capacitor, as capacitive element, is widely used in the reactive power compensation of electrical network, improves line voltage and power factor with this, reduces the loss of circuit.But, electric power system along with the change of load carry out Reactive-power control time, must corresponding point, close capacitor.When excising capacitor, easily there is the initial voltage polarity on capacitor and the opposite polarity situation of power system voltage, make circuit breaker two ends produce higher restoring over-voltage, circuit breaker is restriked, and Restriking overvoltage is by the insulation of serious threat shunt capacitor.
When circuit breaker disconnects shunt capacitor, residual charge on capacitor cannot discharge at short notice, one end of circuit breaker is made to bear system AC power frequency voltage, the other end bears the residual DC voltage of capacitor, namely the difference of the direct current residual voltage of system AC power frequency voltage and capacitor is born at breaker port two ends, circuit breaker is caused to bear higher restoring over-voltage for a long time, once the insulation recovery intensity of circuit breaker can not bear the restoring over-voltage added thereon, very easily produce arc reignition, cause accident to occur.
Therefore, how effectively to reduce the restoring over-voltage produced when circuit breaker disconnects, ensure that the normal operation of Shunt Capacitor Unit device and alternating current conveying system is the problem that those skilled in the art need to solve at present.
Utility model content
The purpose of this utility model is to provide a kind of shunt capacitor switch restoring over-voltage and suppresses circuit, reduce the restoring over-voltage at circuit breaker two ends, improve the reliability of circuit breaker, avoid the probability that circuit breaker is restriked, ensure that the normal operation of Shunt Capacitor Unit device, also ensure that the normal operation of alternating current conveying system.
For solving the problems of the technologies described above, the utility model provides a kind of shunt capacitor switch restoring over-voltage and suppresses circuit, described circuit comprises three-phase alternating current conveying circuit, each cross streams electricity conveying circuit comprises alternating-current voltage source, circuit breaker and the capacitor module of connecting successively respectively, described capacitor module comprises N number of Capacitor banks of connecting successively, each Capacitor banks comprises the capacitor of N number of parallel connection, described N be not less than 1 positive integer;
Each cross streams electricity conveying circuit described also comprises:
In parallel with described capacitor module, discharge the inhibitor of direct voltage residual on described capacitor module.
Preferably, described inhibitor comprises iron core and is wrapped in the primary winding on iron core.
Preferably, described inhibitor comprises iron core and the primary winding that is wrapped on iron core and secondary coil.
Preferably, the iron core of described inhibitor is amorphous alloy iron core.
Preferably, described circuit breaker is vacuum circuit-breaker or sulphur hexafluoride SF6 circuit breaker.
Preferably, described inhibitor is two sleeve structures.
Preferably, described alternating-current voltage source is 10kV.
Preferably, described alternating-current voltage source is 35kV.
Preferably, described n gets 4.
The utility model provides a kind of shunt capacitor switch restoring over-voltage and suppresses circuit, in this circuit, inhibitor is connected in parallel on the two ends of the capacitor module of place phase line, when circuit breaker disconnects Capacitor banks, the iron core of inhibitor is saturated fast, residual charge on Capacitor banks is discharged fast by inhibitor, reduce the restoring over-voltage at circuit breaker two ends, improve the reliability of circuit breaker, avoid the probability that circuit breaker is restriked, ensure that the normal operation of Shunt Capacitor Unit device, thus also just ensure that the normal operation of alternating current conveying system.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in prior art and embodiment below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of shunt capacitor switch restoring over-voltage suppression circuit that Fig. 1 provides for the utility model;
The structural representation of the another kind of shunt capacitor switch restoring over-voltage suppression circuit that Fig. 2 provides for the utility model;
The structural representation of a kind of inhibitor that Fig. 3 provides for the utility model;
The structural representation of the another kind of inhibitor that Fig. 4 provides for the utility model;
The structural representation of a kind of two sleeve pipes that Fig. 5 provides for the utility model;
The one phase equivalent circuit figure of system during the circuit breaker input that Fig. 6 provides for the utility model;
The one phase equivalent circuit figure of system during the circuit breaker disconnection that Fig. 7 provides for the utility model.
Embodiment
Core of the present utility model is to provide a kind of shunt capacitor switch restoring over-voltage and suppresses circuit, reduce the restoring over-voltage at circuit breaker two ends, improve the reliability of circuit breaker, avoid the probability that circuit breaker is restriked, ensure that the normal operation of Shunt Capacitor Unit device, also ensure that the normal operation of alternating current conveying system.
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one
Please refer to Fig. 1, the structural representation of a kind of shunt capacitor switch restoring over-voltage suppression circuit that Fig. 1 provides for the utility model, this circuit comprises:
Three-phase alternating current conveying circuit, each cross streams electricity conveying circuit comprises alternating-current voltage source, circuit breaker and the capacitor module of connecting successively respectively, includes N number of Capacitor banks of connecting successively in each capacitor module, N be not less than 1 positive integer.Wherein, alternating-current voltage source on first-phase alternating current circuit is Ea, circuit breaker is T1, capacitor module is C1, the Capacitor banks that capacitor module C1 comprises is C11, C12 ... C1N, alternating-current voltage source on second-phase alternating current circuit is Eb, circuit breaker is T2, capacitor module is C2, the Capacitor banks that capacitor module C2 comprises is C21, C22 ... C2N, the alternating-current voltage source on third phase alternating current circuit is Ec, and circuit breaker is T3, capacitor module is C3, and the Capacitor banks that capacitor module C3 comprises is C31, C32 ... C3N; Include the capacitor of N number of parallel connection in each Capacitor banks, N be not less than 1 positive integer.
Each cross streams electricity conveying circuit also comprises:
In parallel with capacitor module, the inhibitor of direct voltage residual in releasing capacitor module, comprising, with C11, C12 ... the inhibitor X1 of C1N parallel connection, with C21, C22 ... the inhibitor X2 of C2N parallel connection, and with C31, C32 ... the inhibitor X3 of C3N parallel connection.
Be that the place phase line of Ea explains the present embodiment for example below with alternating-current voltage source, phase line situation is identical therewith for all the other two phase lines, does not repeat them here.
Be understandable that, when circuit breaker T1 drops into Shunt Capacitor Unit C11, C12 ... during C1N, inhibitor X1 bears and Capacitor banks C11, C12 ... the alternating voltage that C1N is identical, and present high-impedance state, be equivalent to open circuit, Capacitor banks C11, C12 can not be affected ... the normal operation of C1N.
When circuit breaker T1 disconnects Shunt Capacitor Unit C11, C12 ... during C1N, the alternating voltage source of circuit breaker T1 bears system AC power frequency voltage, the residual DC voltage of capacitor is born in Capacitor banks side, namely the difference of the direct current residual voltage of system AC power frequency voltage and capacitor is born in breaker port both sides, circuit breaker T1 is caused to bear higher restoring over-voltage for a long time, and circuit breaker T1 disconnects Shunt Capacitor Unit C11, C12 ... during C1N, Capacitor banks C11 now, C12 ... C1N is approximately direct voltage source, inhibitor X1 is approximately in parallel with a direct voltage source, the iron core of inhibitor X1 is saturated fast, inhibitor X1 presents low resistive state, make Capacitor banks C11, C12 ... C1N discharges remaining direct voltage fast, Capacitor banks C11, C12 ... the residual DC voltage of C1N reduces rapidly, thus the restoring over-voltage at circuit breaker T1 two ends also reduces rapidly.
The utility model provides a kind of shunt capacitor switch restoring over-voltage and suppresses circuit, in this circuit, inhibitor is connected in parallel on the two ends of the capacitor module of place phase line, when circuit breaker disconnects capacitor module, the iron core of inhibitor is saturated fast, residual charge on capacitor module is discharged fast by inhibitor, reduce the restoring over-voltage at circuit breaker two ends, improve the reliability of circuit breaker, avoid the probability that circuit breaker is restriked, ensure that the normal operation of parallel capacitor device, thus also just ensure that the normal operation of alternating current conveying system.
Embodiment two
Please refer to Fig. 2, the structural representation of the another kind of shunt capacitor switch restoring over-voltage suppression circuit that Fig. 2 provides for the utility model, in the present embodiment, alternating-current voltage source is that 35kV, N get 4, and Capacitor banks comprises 4 capacitor modules of connecting successively.Capacitor module C1 comprises Capacitor banks C11, C12 ... C14, capacitor module C2 comprises capacitor C21, C22 ... C24, capacitor module C3 comprises Capacitor banks C31, C32 ... C34; Other parts can with reference to system configuration shown in figure 1.
In the present embodiment, inhibitor comprises iron core 11 and is wrapped in the primary winding 12 on iron core, and its structure as shown in Figure 3.
In addition, the concrete structure of inhibitor, except above-mentioned, can also be, inhibitor comprises iron core 11 and the primary winding 12 that is wrapped on iron core and secondary coil 13, and its structure as shown in Figure 4.
Be understandable that, releasing capacitor group residual DC voltage be primary winding 12, secondary coil 13 plays measurement effect, such as, can measure residual DC voltage or Capacitor banks C11, C12 of Capacitor banks ... electric current in the loop that C14 and inhibitor X1 forms.
It should be noted that in addition be no matter the iron core 11 of primary winding 12 or secondary coil 13 when alternating voltage effect, all present high impedance status, be equivalent to open circuit; When direct voltage effect, iron core 11 is saturated fast, and impedance reduces rapidly, presents low impedance state.
Further, the iron core of inhibitor is amorphous alloy iron core.
Be understandable that, amorphous alloy iron core has high saturated magnetic induction, make when circuit breaker disconnects Shunt Capacitor Unit, Capacitor banks is approximately direct voltage source, and inhibitor is approximately in parallel with a direct voltage source, the iron core of inhibitor is saturated fast, inhibitor presents low resistive state, and capacitor module discharges remaining direct voltage fast, therefore, the residual DC voltage of capacitor module reduces rapidly, thus the restoring over-voltage at circuit breaker two ends also reduces rapidly.
Further, inhibitor is two sleeve structures.
Please refer to Fig. 5, the structural representation of a kind of two sleeve pipes that Fig. 5 provides for the present embodiment.
As we know from the figure, two sleeve structures for inhibitor to be encapsulated, and amplify out X and A two terminals, X and A two terminals are connected in parallel on the both sides of capacitor module.
Be that the place phase line of Ea explains the present embodiment for example below with alternating-current voltage source, phase line situation is identical therewith for all the other two phase lines, does not repeat them here.
Please refer to Fig. 6 and Fig. 7, wherein, when the circuit breaker that Fig. 6 provides for the present embodiment drops into, the one phase equivalent circuit figure of system, Fig. 7 are the one phase equivalent circuit figure of system when circuit breaker that the present embodiment provides disconnects.
When circuit breaker T1 drops into Shunt Capacitor Unit C11, C12 ... during C14, inhibitor X1 bears and Capacitor banks C11, C12 ... the alternating voltage that C14 is identical, and present high-impedance state, be equivalent to open circuit, Capacitor banks C11, C12 can not be affected ... the normal operation of C14.
When circuit breaker T1 disconnects Shunt Capacitor Unit C11, C12 ... during C14, Capacitor banks C11, C12 ... C14 is approximately direct voltage source, inhibitor X1 is approximately in parallel with a direct voltage source, inhibitor X1 presents low resistive state, make Capacitor banks C11, C12 ... C14 discharges remaining direct voltage fast, Capacitor banks C11, C12 ... the residual DC voltage of C14 reduces rapidly, thus the restoring over-voltage at circuit breaker T1 two ends also reduces rapidly.
Further, in the present embodiment, circuit breaker T1 is vacuum circuit-breaker or sulphur hexafluoride SF6 circuit breaker.
Be understandable that, vacuum circuit-breaker is gained the name because the dielectric of contact gap after its arc-extinguishing medium and arc extinguishing is all high vacuum; Have volume little, lightweight, be applicable to frequent operation, advantage that arc extinguishing need not overhaul, therefore apply comparatively universal in power distribution network; Sulphur hexafluoride SF6 circuit breaker has that the life-span is long, insulation level is high and the advantage such as good seal performance, has now been widely used in superhigh pressure bulk power system.
Certainly, the utility model is also not limited in vacuum circuit-breaker or sulphur hexafluoride SF6 circuit breaker, can realize the circuit breaker of the utility model technique effect all within protection range of the present utility model.
In like manner, it is 35kV that the present embodiment does not limit alternating-current voltage source yet, and alternating-current voltage source can also be 10kV.
Be understandable that, a kind of shunt capacitor switch restoring over-voltage that the utility model provides suppresses circuit to be also not limited to 35kV ac power supply system, also be applicable to 10kV ac power supply system, specifically select the alternating-current voltage source of which kind of specification to be decided by actual conditions.
It should be noted that the specification of alternating-current voltage source is different, the capacitor number in every phase circuit also may be different, specifically select several capacitor to be determined by concrete actual conditions.
The utility model provides a kind of shunt capacitor switch restoring over-voltage and suppresses circuit, in this circuit, inhibitor is connected in parallel on the two ends of the capacitor module of place phase line, when circuit breaker drops into shunt capacitor module, inhibitor bears the alternating voltage identical with capacitor module, and present high-impedance state, be equivalent to open circuit, the normal operation of capacitor module can not be affected.When circuit breaker disconnects shunt capacitor module, capacitor module is approximately direct voltage source, inhibitor is approximately in parallel with a direct voltage source, the iron core of inhibitor is saturated fast, inhibitor presents low resistive state, capacitor module is made to discharge remaining direct voltage fast, the residual DC voltage of capacitor module reduces rapidly, thus the restoring over-voltage at circuit breaker two ends also reduces rapidly, improve the reliability of circuit breaker, avoid the probability that circuit breaker is restriked, ensure that the normal operation of parallel capacitor device, thus also just ensure that the normal operation of alternating current conveying system.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
In addition, also it should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a shunt capacitor switch restoring over-voltage suppresses circuit, it is characterized in that, described circuit comprises three-phase alternating current conveying circuit, each cross streams electricity conveying circuit comprises alternating-current voltage source, circuit breaker and the capacitor module of connecting successively respectively, described capacitor module comprises N number of Capacitor banks of connecting successively, each Capacitor banks comprises the capacitor of N number of parallel connection, described N be not less than 1 positive integer;
Each cross streams electricity conveying circuit described also comprises:
In parallel with described capacitor module, discharge the inhibitor of direct voltage residual on described capacitor module.
2. circuit according to claim 1, is characterized in that, described inhibitor comprises iron core and is wrapped in the primary winding on iron core.
3. circuit according to claim 1, is characterized in that, described inhibitor comprises iron core and the primary winding that is wrapped on iron core and secondary coil.
4. the circuit according to Claims 2 or 3, is characterized in that, the iron core of described inhibitor is amorphous alloy iron core.
5. circuit according to claim 4, is characterized in that, described circuit breaker is vacuum circuit-breaker or sulphur hexafluoride SF6 circuit breaker.
6. circuit according to claim 5, is characterized in that, described inhibitor is two sleeve structures.
7. circuit according to claim 6, is characterized in that, described alternating-current voltage source is 10kV.
8. circuit according to claim 6, is characterized in that, described alternating-current voltage source is 35kV.
9. circuit according to claim 8, is characterized in that, described N gets 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420701742.2U CN204167900U (en) | 2014-11-20 | 2014-11-20 | A kind of shunt capacitor switch restoring over-voltage suppresses circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420701742.2U CN204167900U (en) | 2014-11-20 | 2014-11-20 | A kind of shunt capacitor switch restoring over-voltage suppresses circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204167900U true CN204167900U (en) | 2015-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420701742.2U Expired - Fee Related CN204167900U (en) | 2014-11-20 | 2014-11-20 | A kind of shunt capacitor switch restoring over-voltage suppresses circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204167900U (en) |
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2014
- 2014-11-20 CN CN201420701742.2U patent/CN204167900U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 |