CN201266573Y - High-voltage vacuum breaker - Google Patents
High-voltage vacuum breaker Download PDFInfo
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- CN201266573Y CN201266573Y CNU2008201913820U CN200820191382U CN201266573Y CN 201266573 Y CN201266573 Y CN 201266573Y CN U2008201913820 U CNU2008201913820 U CN U2008201913820U CN 200820191382 U CN200820191382 U CN 200820191382U CN 201266573 Y CN201266573 Y CN 201266573Y
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model relates to a high voltage vacuum circuit breaker, which belongs to a protective device of a power system, solves the problem of dynamic and static voltage balancing of series operation of vacuum switches and increases the reliability of series breaking of the vacuum switches. The utility model adopts a three phase independent structure, each phase consists of 2 to 20 switch units which are connected in series, each switch unit consists of a vacuum switch module, a zinc oxide lightning rod and a resistance capacitance voltage balancing component which are connected in parallel; the resistance capacitance voltage balancing component consists of a voltage balancing capacitor, a current-limiting resistor and a voltage balancing resistor, and the voltage balancing capacitor is connected with the current-limiting resistor in series and then is connected with the voltage balancing resistor in parallel. By paralleling the voltage balancing resistor, the voltage balancing capacitor, the current-limiting resistor and the zinc oxide lightning rod to every vacuum switch, the high voltage vacuum circuit breaker solves the problem of dynamic and static voltage balancing of series operation of the vacuum switches and can increase the reliability of series breaking of the vacuum switches effectively.
Description
Technical field
The utility model belongs to electric system protection device, particularly a kind of high-pressure vacuum breaker.
Background technology
At present, sulphur hexafluoride (SF6) circuit breaker that is most widely used at present in high pressure, superhigh pressure and big current domain more than 110 kilovolts will be owing to the environmental protection reason will be limited to use gradually, and vacuum is considered to insulation, the arc-extinguishing medium that most probable replaces sulphur hexafluoride.But because the special nature of vacuum medium causes present this vacuum switch module and other vacuum circuit-breaker only to be applicable to that voltage is the mesolow occasion below 35 kilovolts.
The name that Dalian University of Technology has is called the patent of " a kind of optically controlled modular high-pressure vacuum switch ", the patent No. 01127930, Granted publication CN1185668C; This patent constitutes high-pressure vacuum switch by the light controlled vacuum switch module series connection, each module is finished the connection and the disjunction of electric current with vacuum interrupter, operating mechanism directly links to each other with arc control device, taking out energy with the induction by current coil from load current is charge in batteries, controlling this storage battery by photoelectric device is operating mechanism power supply, each module by optical fiber in the cold end Synchronization Control.
Wherein light controlled vacuum switch module such as Fig. 2, shown in Figure 3, when the left end cap lead-in wire 6 process vacuum interrupters 7 of high-tension current from module, induction by current coil 11 went between 8 o'clock to right end cap, induce secondary current in the induction by current coil 11, carry out floating charge through Switching Power Supply 20 for storage battery 22, and boost by DC to DC converter shown in Figure 3 21, make energy storage capacitor 19 keep charged state, 19 discharges of controller 12 control energy storage capacitors, energy storage capacitor 19 joins with the magnet exciting coil of operating mechanism 10, the take-off lever of operating mechanism 10 directly links to each other with the moving conductive rod of vacuum interrupter 7, the control signal of cold end imports controller 12 through input optical fibre 16, photo-electric conversion element in the via controller 12 becomes the triggering signal of electronic power switch device, electric energy in the energy storage capacitor is discharged in the magnet exciting coil of operating mechanism 10, finishes the actuating of vacuum interrupter 7.
Vacuum switch module is connected simply to improve the working voltage grade of vacuum switch, can there be intermodule sound attitude voltage problem of uneven distribution, may cause indivedual arc control device to bear higher voltage, thereby repeatedly restriking or re-breakdown phenomenon after the blow-out appears when cut-offfing in the vacuum switch module that causes connecting, and reduces and cut-offs the probability of success.
Summary of the invention
The utility model provides a kind of high-pressure vacuum breaker, solves the moving static state voltage equipoise problem of vacuum switch series operation, improves the reliability that the vacuum switch series connection is cut-off.
A kind of high-pressure vacuum breaker of the present utility model adopts the three-phase absolute construction, and each comprises the vacuum switch module of series connection and resistance, capacitor element mutually, it is characterized in that:
Each is composed in series by 2～20 switch elements, and each switch element all presses the assembly parallel connection to constitute by described vacuum switch module and zinc oxide arrester, capacitance-resistance;
Described capacitance-resistance all presses assembly to be made of equalizing capacitance, current-limiting resistance and grading resistor, and is after equalizing capacitance and the current-limiting resistance series connection, in parallel with grading resistor again.
Described high-pressure vacuum breaker is characterized in that:
Described vacuum switch module comprises vacuum interrupter, operating mechanism, operating power, controller, optical fiber interface; The indoor fixed contact of vacuum extinction is electrically connected with end lead-in wire, moving contact is electrically connected with other end lead-in wire, moving contact is driven by operating mechanism, operating mechanism is electrically connected with controller, controller receives external control signal by optical fiber interface, control operation power drives operating mechanism, operating power provides power supply for operating mechanism, controller.
Described high-pressure vacuum breaker is characterized in that:
In the described vacuum switch module, operating power is made up of induction by current coil, isolating switch, Switching Power Supply, storage battery, DC to DC converter, energy storage capacitor, the output of induction by current coil is sent into Switching Power Supply through isolating switch, after the Switching Power Supply rectification, storage battery is carried out floating charge, and boost by DC to DC converter, energy storage capacitor is charged.
When the dynamic and static contact of vacuum switch module vacuum interrupter is in closure state, operating power is directly passed through the induction by current coil from high-voltage side bus power taking energy, charge a battery through becoming the low-voltage direct source after Switching Power Supply rectification, filtering and the voltage stabilizing, and after DC to DC converter inversion and rectification, charge to energy storage capacitor.
After the high-pressure vacuum breaker action, the dynamic and static contact of vacuum switch module vacuum interrupter temporarily is in gate-dividing state or works as the grid power blackout time more in short-term, and the induction by current coil can't directly take out energy from power network current, can continue power supply by storage battery; But, will adopt insulating power supply to guarantee reliably to get energy based on electro-optical conversion when the dynamic and static contact of vacuum arc control device is in gate-dividing state than length or when the grid power blackout time is oversize.
For the series vacuum switch module, because the difference of element voltage rate of change parameter d v/dt and the difference of recovery time, cause opening with turn off process in the element voltage distribution of bearing inhomogeneous, extreme case may can all be added on the vacuum switch module by branch voltage down, give the vacuum switch module shunt capacitance can deboost rate of change dv/dt, for electric capacity in the limit switch contact closure process influences current changing rate di/dt by the element discharge, give the capacitances in series current-limiting resistance again, form the RC capacitance-resistance and absorb equalizer circuit.
Simultaneously, give each vacuum switch module zinc oxide arrester in parallel.Like this, behind arc in the process of medium recovery, certain vacuum switch module arc control device bears recovery voltage when too high, zinc oxide arrester in parallel with it action earlier, recovery voltage between restriction vacuum switch module arc control device contact, avoid arc control device to restrike or thump and wear, thereby the arc control device of series connection are finished breaking course jointly.Compare the series operation mode of all being pressed by capacitor merely, under auxiliary all pressure effects of zinc oxide arrester, interrupting process more can reduce the number of times that the bang of vacuum switch module arc control device is worn, and improves the series connection connecting-disconnecting function.
The utility model passes through to each vacuum switch module grading resistor in parallel, equalizing capacitance and elements such as current-limiting resistance and zinc oxide arrester, solve the moving static state voltage equipoise problem of vacuum switch series operation, can effectively improve the reliability that the vacuum switch series connection is cut-off.
Description of drawings
Fig. 1 is the utility model embodiment schematic diagram;
Among the figure, vacuum switch module 1, zinc oxide arrester 2, equalizing capacitance 3, current-limiting resistance 4, grading resistor 5.
Fig. 2 is for constituting vacuum switch module structural representation of the present utility model;
Among the figure, left end cap lead-in wire 6, vacuum interrupter 7, right end cap lead-in wire 8, power conversion unit and storage battery 9, operating mechanism 10, induction by current coil 11, controller 12, insulation crust 13, optical fiber interface 14.
Fig. 3 is the schematic diagram that is electrically connected of vacuum switch module;
Among the figure, the position transducer 15 of operating mechanism take-off lever, input optical fibre 16, output optical fibre 17, isolating switch 18, energy storage capacitor 19, Switching Power Supply 20, DC to DC converter 21, storage battery 22, photoelectricity send energy port 23, operating power 24.
Embodiment
Fig. 1 is an embodiment of the present utility model, is composed in series by two switch elements, and each switch element all presses the assembly parallel connection to constitute by vacuum switch module 1 and zinc oxide arrester 2, capacitance-resistance; Capacitance-resistance all presses assembly to be made of equalizing capacitance 3, current-limiting resistance 4 and grading resistor 5, and is after equalizing capacitance 3 and current-limiting resistance 4 series connection, in parallel with grading resistor 5 again.
Grading resistor 5 plays all pressure effects; Equalizing capacitance 3, current-limiting resistance 4 series arms play series connection dynamic voltage balancing effect, wherein current-limiting resistance 4 for electric capacity in the limit switch contact closure process by the discharging current of switch contact; Simultaneously grading resistor 5 constitutes the loop with equalizing capacitance 3, current-limiting resistance 4 series arms, is used in the bleed off operation transient process electric field energy of storage in the equalizing capacitance 3.Simultaneously, rationally choose residual voltage of arrester at the two ends of each vacuum switch module 1 zinc oxide arrester in parallel, recovery voltage amplitude between the limiting circuit breaker fracture, thus reduce the possibility of restriking or thumping and wearing.Realize the reliable series operation of a plurality of vacuum switch modules 1.
In the present embodiment, vacuum switch module 1 parameter: 40.5kV-1250A-31.5kA, the capacitance of equalizing capacitance 3 are 2nF; The resistance value of current-limiting resistance 4 is 1k Ω; Zinc oxide arrester 2 residual voltage 40kV.Two switch elements constitute a 72.5kV-1250A-31.5kA vacuum circuit-breaker.
As shown in Figure 2, vacuum switch module of the present utility model comprises left end cap lead-in wire 6, vacuum interrupter 7, right end cap lead-in wire 8, power conversion unit and storage battery 9, operating mechanism 10, induction by current coil 11, controller 12, insulation crust 13, optical fiber interface 14; Wherein, power conversion unit and storage battery 9 and induction by current coil 11 constitute operating power, fixed contact in the vacuum interrupter 7 is electrically connected left end cap lead-in wire 6, moving contact is electrically connected right end cap lead-in wire 8, moving contact is driven by operating mechanism 10, operating mechanism 10 is electrically connected with controller 12, controller 12 receives external control signal by optical fiber interface 14, control operation power drives operating mechanism 10, operating power provides power supply for operating mechanism 10, controller 12, and above-mentioned each parts place in the insulation crust 13.
Operating mechanism can be made of permanent magnet and coil.
As shown in Figure 3, in the vacuum switch module, operating power 24 is made up of induction by current coil 11, isolating switch 18, Switching Power Supply 20, storage battery 22, DC to DC converter 21, energy storage capacitor 19, wherein Switching Power Supply 20, storage battery 22, DC to DC converter 21, energy storage capacitor 19 common power conversion unit and the storage batterys of forming among Fig. 29; 11 outputs of induction by current coil are sent into Switching Power Supply 20 through isolating switch 18, after Switching Power Supply 20 rectifications storage battery 22 are carried out floating charge, and boost by DC to DC converter 21, to energy storage capacitor 19 chargings.Reserving between induction by current coil 11 and isolating switch 18 that photoelectricity send can port 23, under the dynamic and static contact of high-pressure vacuum breaker does not have situation that electric current passes through for a long time, send and can send energy for storage battery 22 and energy storage capacitor 19 by port 23 from photoelectricity.
As Fig. 2, shown in Figure 3, when vacuum switch module vacuum interrupter moves, when fixed contact is in closure state, high-tension current is from left end cap lead-in wire 6 process vacuum interrupters 7, induction by current coil 11 is to right end cap lead-in wire 8, induce secondary current in the induction by current coil 11, carry out floating charge through Switching Power Supply 20 for storage battery 22, and boost by DC to DC converter 21, make energy storage capacitor 19 keep charged state, energy storage capacitor 19 joins by the magnet exciting coil of controller 12 controls with operating mechanism 10, the take-off lever of operating mechanism 10 directly links to each other with the moving conductive rod of vacuum interrupter 7, the control signal of cold end imports controller 12 through input optical fibre 16, photo-electric conversion element in the via controller 12 becomes the triggering signal of electronic power switch device, electric energy in the energy storage capacitor 19 is discharged in the magnet exciting coil of operating mechanism 10, finishes the actuating of vacuum interrupter 7.
Induction by current coil 11 adopts ring-like core construction, and the secondary current that induces is sent into Switching Power Supply 20 and storage battery 22, and is in turn connected into from tool type power supply.Make the output of induction by current coil 11 too high when overload or short circuit take place, and when making the charging voltage of storage battery 22 exceed preset range, controller 12 will control isolating switch 18 and cut off the path that induction by current coils 11 arrive Switching Power Supply 20.Isolating switch 18 adopts the technical grade relay.
Claims (3)
1. high-pressure vacuum breaker adopts the three-phase absolute construction, and each comprises the vacuum switch module of series connection and resistance, capacitor element mutually, it is characterized in that:
Each is composed in series by 2～20 switch elements, and each switch element all presses the assembly parallel connection to constitute by described vacuum switch module and zinc oxide arrester, capacitance-resistance;
Described capacitance-resistance all presses assembly to be made of equalizing capacitance, current-limiting resistance and grading resistor, and is after equalizing capacitance and the current-limiting resistance series connection, in parallel with grading resistor again.
2. high-pressure vacuum breaker as claimed in claim 1 is characterized in that:
Described vacuum switch module comprises vacuum interrupter, operating mechanism, operating power, controller, optical fiber interface; The indoor fixed contact of vacuum extinction is electrically connected with end lead-in wire, moving contact is electrically connected with other end lead-in wire, moving contact is driven by operating mechanism, operating mechanism is electrically connected with controller, controller receives external control signal by optical fiber interface, control operation power drives operating mechanism, operating power provides power supply for operating mechanism, controller.
3. high-pressure vacuum breaker as claimed in claim 1 or 2 is characterized in that:
In the described vacuum switch module, operating power is made up of induction by current coil, isolating switch, Switching Power Supply, storage battery, DC to DC converter, energy storage capacitor, the output of induction by current coil is sent into Switching Power Supply through isolating switch, after the Switching Power Supply rectification, storage battery is carried out floating charge, and boost by DC to DC converter, energy storage capacitor is charged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201913820U CN201266573Y (en) | 2008-10-10 | 2008-10-10 | High-voltage vacuum breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201913820U CN201266573Y (en) | 2008-10-10 | 2008-10-10 | High-voltage vacuum breaker |
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| Publication Number | Publication Date |
|---|---|
| CN201266573Y true CN201266573Y (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201913820U Expired - Fee Related CN201266573Y (en) | 2008-10-10 | 2008-10-10 | High-voltage vacuum breaker |
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| CN (1) | CN201266573Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364655A (en) * | 2011-11-17 | 2012-02-29 | 武汉大学 | Dynamic voltage sharing device of multi-break vacuum circuit breaker and parameter selection method for dynamic voltage sharing device |
| CN103280819A (en) * | 2013-05-31 | 2013-09-04 | 国家电网公司 | Paralleling reactor compensation loop of transformer substation and compensation method of paralleling reactor compensation loop of transformer substation |
| GB2531935A (en) * | 2014-10-24 | 2016-05-04 | The General Electric Company | Interrupter module |
-
2008
- 2008-10-10 CN CNU2008201913820U patent/CN201266573Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364655A (en) * | 2011-11-17 | 2012-02-29 | 武汉大学 | Dynamic voltage sharing device of multi-break vacuum circuit breaker and parameter selection method for dynamic voltage sharing device |
| CN103280819A (en) * | 2013-05-31 | 2013-09-04 | 国家电网公司 | Paralleling reactor compensation loop of transformer substation and compensation method of paralleling reactor compensation loop of transformer substation |
| CN103280819B (en) * | 2013-05-31 | 2014-12-03 | 国家电网公司 | Paralleling reactor compensation loop of transformer substation and compensation method of paralleling reactor compensation loop of transformer substation |
| GB2531935A (en) * | 2014-10-24 | 2016-05-04 | The General Electric Company | Interrupter module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20101010 |