CN103578843A - Non-reignition disconnector - Google Patents
Non-reignition disconnector Download PDFInfo
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- CN103578843A CN103578843A CN201310558335.0A CN201310558335A CN103578843A CN 103578843 A CN103578843 A CN 103578843A CN 201310558335 A CN201310558335 A CN 201310558335A CN 103578843 A CN103578843 A CN 103578843A
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- circuit breaker
- restriking
- resistance
- fracture
- voltage
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Abstract
The invention provides a non-reignition disconnector which comprises a disconnector arc extinguishing chamber, and further comprises a non-linear pressure-sensitive unit, and the non-linear pressure-sensitive unit is connected with an upper electrified portion and a lower electrified portion of a fracture of the disconnector arc extinguishing chamber in parallel. According to the non-reignition disconnector, the voltage difference between the two ends of the facture is leveled before backward voltage and recovery voltage of the fracture exceed a fracture withstand voltage level, and reignition is eliminated.
Description
Technical field
Patent of the present invention relates to electric equipment field, relates in particular to a kind of circuit breaker of not restriking.
Background technology
In the electrical network of each step voltage, all conveying circuit such as overhead wire, cable, all electric equipment elements such as generator, transformer, motor, reactor, capacitor, all control with circuit breaker (being commonly called as switch).These circuit breakers consist of fracture, arc control device, operating mechanism, are used for manually or automatic disconnection and closed normal operating current and short circuit current.All can arcing when two contacts of fracture disconnect, and in the arc control device of sealing arc extinguishing, complete disconnection process.Insulation in arc control device and arc-extinguishing medium have pressurization or the air that vacuumizes, oil, sulphur hexafluoride (SF6) etc.
The arcing process that fracture is observed on microcosmic ground, is all much within the arcing arc extinguishing period, and arc extinguishing occurs, and---restrike (bang is worn)---arc extinguishing---is restriked---arc extinguishing again until disconnect completely again.
When circuit breaker is restriked at every turn, can be all the process being recharged to circuit or load side by mains side, the mobile refraction of electric wave and reflection can produce the very high overvoltage of restriking.Its amplitude can reach the more than 3～4 times of high workload phase voltage, and frequency of oscillation reaches kilo hertz more than sesame, destroys the insulation of circuit and equipment, and the safe operation of electrical network and electric equipment are all caused to serious threat.In circuit breaker disconnects, when the voltage at fracture two ends (title recovery voltage) is too high, not only can causes and restrike, produce the overvoltage of restriking, also can make arc-extinguishing chamber of circuit breaker that outer flashover occurs, even arc control device blast.Circuit breaker is restriked is difficult to avoid the serious consequence brought with it, is one of difficult problem of each specialized departments such as scientific research in puzzlement power industry, design, manufacture, operation always.For example:
Certain ferrosilicon enterprise,, in switching transformer process, all there is circuit breaker blast for one 7,8 times in newly-built 35KV power distribution equipment.And cannot carry out Installation and Debugging handing-over; 35KV side circuit breaker in 500KV superhigh pressure load-center substation, when switching reactor or capacitor, often blasts, and is forced to use instead the 66KV circuit breaker of a high step voltage, and as the general whole nation of standard design; The 35KV system of certain steel plant, has selected World Famous Brand circuit breaker, 4 first after-explosions in service.Manufacturer is in-situ processing repeatedly, except replacing, can not propose other better corrective measures etc.This equipment breakdown takes place frequently, and goes out endless repeatly.
The overvoltage protection of China-styled Certain Industry Field standard DL/T620-1997 < < alternating-current electric device and insulation coordination > > 4.2.5 bar regulation: " when 3KV～66KV system is cut-off parallel condenser compensation device and worn as single-phase bang occurs circuit breaker, capacitor high-pressure side overvoltage to earth may surpass 4.0p.u.When cut-offfing front mains side and having single phase ground fault, this overvoltage will be higher.While cut-offfing, as there is two-phase bang, wear, between capacitor pole, overvoltage may surpass
operation parallel condenser compensation device, should adopt the circuit breaker of not thumping and wearing while cut-offfing.For the compensation arrangement that needs frequent switching, should install parallel condenser compensation device metal oxide arrester, as the single-phase bang of restriction, wear superpotential backup protection equipment.At mains side, there is single phase ground fault not require to compensate under the condition that device cut-offs operation, should adopt F1.Breaker operator frequent and may occur that bang is worn while cut-offfing or making process in contact while having bounce, should install parallel condenser compensation device metal oxide arrester F1 and F3 or F4.F3 or F4 are in order to limit the overvoltage occurring between capacitor pole when two-phase bang is worn.When the reactance Rate of parallel condenser compensation device reactor is not less than 12%, should adopt F4.”
The overvoltage protection of standard GB/T/T50064-2013 < < alternating-current electric device and insulation coordination design specification > > 4.2.7 bar regulation: " when nonloaded line cut-offs; wear as bang occurs circuit breaker, will produce nonloaded line gate-dividing super-voltage.Its restriction should meet the following requirements:
1) to the 110kV of scope I and 220kV system, should adopt the extremely low circuit breaker of heavy breakdown probability, prevent that the overvoltage of cut-offfing no-load over head line from surpassing 3.0p.u.; Cut-off cable line and may surpass 3.0p.u., should adopt the extremely low circuit breaker of heavy breakdown probability.
2), to the 66kV of scope I and following isolated neutral system or resonant earthed system, overvoltage when circuit breaker cut-offs nonloaded line and bang occurs wears is generally no more than 3.5p.u..Cut-off the existing single phase ground fault of front system, the overvoltage producing while using general breaker operator may surpass 4.0p.u., should adopt the extremely low circuit breaker of heavy breakdown probability.The low resistance earthing system of 6kV～35kV, the overvoltage when cut-offfing nonloaded line circuit breaker and bang occurring wear may reach 3.5p.u., should adopt the extremely low circuit breaker of heavy breakdown probability." 4.2.8 bar regulation: " in 6kV～66kV system, cut-off parallel condenser compensation device, if single-phase bang occurs circuit breaker while wearing, capacitor group overvoltage to earth may surpass 4.0p.u..When cut-offfing front mains side and having single phase ground fault, this overvoltage will be higher.While cut-offfing, as there is two-phase bang, wear, capacitor group interpolar overvoltage may surpass
(U
acrated voltage for capacitor group).Switching parallel condenser compensation device, should adopt the extremely low circuit breaker of heavy breakdown probability.Protection in support, should be by figure installing metal oxide arrester to limit single-phase bang through voltage.Generally can not consider that circuit breaker generation two-phase bang wears.”
These operation production practices and rules regulations all illustrates above: resolving the circuit breaker problem of (bang is worn) of restriking has been the problem of national level or even international aspect.At present, still do not have better way to resolve this difficult problem both at home and abroad, and just after the overvoltage of restriking occurs, take the safeguard measure of some standby, cure the symptoms, not the disease.
Summary of the invention
In order to solve existing technical problem in background technology, patent of the present invention has proposed a kind of circuit breaker of not restriking, and at fracture, occurs just the voltage difference at fracture two ends being evened up before reverse voltage, recovery voltage exceed fracture withstand voltage level, stops to restrike.
The technical solution of patent of the present invention is: the circuit breaker of not restriking, comprise arc-extinguishing chamber of circuit breaker, it is characterized in that: the described circuit breaker of not restriking also comprises non-linear pressure-sensitive unit, the upper and lower charged position of described non-linear pressure-sensitive unit and arc-extinguishing chamber of circuit breaker fracture also connects.
Said apparatus and breaker vacuum, SF6's or the oil-filled charged position of arc control device in parallel, this device comprises the non-linear piezo-resistance unit consisting of metal oxide.
Above-mentioned non-linear piezo-resistance unit is one or more non-linear piezo-resistances.
Above-mentioned a plurality of non-linear piezo-resistance is that series, parallel or series connection add parallel connection.
Above-mentioned non-linear piezo-resistance and arc-extinguishing chamber of circuit breaker are integrative-structure or Split type structure.
The shape of above-mentioned non-linear piezo-resistance is circle, ellipse, the square or polygonal of the porose or atresia in center.
Above-mentioned non-linear piezo-resistance is the solid articles of zinc oxide or zinc oxide and the synthetic sintering of other metal oxide.
The circuit breaker of not restriking of the present invention, it is a set of device that prevents that circuit breaker from restriking in parallel on breaker fracture, at fracture, occurs just the voltage difference at fracture two ends being evened up before reverse voltage, recovery voltage exceed fracture withstand voltage level, stops to restrike.
Accompanying drawing explanation
Fig. 1 is the structural representation of patent of the present invention;
Embodiment
Patent of the present invention has proposed not restrike circuit breaker, and the basic thinking addressing this problem is exactly that reverse voltage appears in fracture, before recovery voltage exceeds fracture withstand voltage level, the voltage difference at fracture two ends will be evened up.Be exactly in other words before restriking, give fracture an earial drainage bypass in parallel, voltage difference is lowered, destroy its condition of restriking, just can get twice the result with half the effort and stop to restrike.This just need to, within extremely short time that fracture disconnects, complete following process: contact of breaker start separate → to detect voltage between two contacts → trigger and start the action of shunting device → shunting device fracture bypass → bypass loop earial drainage, reduction fracture recovery voltage below withstand voltage level → circuit breaker completes sub-switching operation.
Specific embodiments is referring to Fig. 1, A, the B point at the upper and lower charged position of arc control device of 6～66KV circuit breaker, and connect one group of non-linear piezo-resistance, this resistance is the very big resistance of M Ω level before action.Circuit breaker is when open position, and the Current Control in resistance loop, below 1mA, can be considered loop obstructed; When circuit breaker is closing position, fracture is closed, and A, B point is by short circuit, and resistance loop also no current flows through.Only have circuit breaker to occur the higher-order of oscillation in disconnecting arcing process, at A, B point voltage, approach and be less than fracture when withstand voltage, non-linear piezo-resistance is experienced this voltage the conducting of moving, now resistance is reduced to tens of Ω suddenly with nanoscale speed, resistance loop flows through of short duration impulse current, and A, B two point voltages are the only voltage drop of electric current for this reason at this moment.And be controlled at below fracture withstand voltage level.The operation voltage U of nonlinear resistance
dadjust like this: it equals to be greater than the rated voltage U of circuit breaker
e.And consider the maximum working voltage of electrical network, the power-frequency overvoltage of electrical network and necessary margin of safety.Common desirable U
d>=(1.8～2.0) U
e.Formed voltage drop (residual voltage) U after nonlinear resistance action
c, be less than one minute withstand voltage U of power frequency of breaker fracture
n.And consider necessary nargin, U conventionally
c<(0.8～0.87) U
n.
In this case, circuit breaker can not restriked.Non-linear piezo-resistance can be the solid articles of zinc oxide or zinc oxide and the synthetic sintering of other metal oxide materials.Be shaped as circle, ellipse, square, polygonal etc., centre can porose or atresia, does slabbing, bar-shaped, plate-like etc., can be singly only, also can many serial or parallel connection, also can connect and add parallel connection.
It has following physical features: very responsive to being applied to ohmically voltage.When voltage is during lower than set point in advance, its resistance is very big.By electric current, it is microampere order; When voltage is during higher than design load, resistance diminishes on hundreds thousand of times of ground suddenly, and along with a small amount of of voltage raises, just makes to reach hundreds of to thousands of peaces by electric current.This nonlinear characteristic possesses repeatability, stability.After voltage is lower than set point, resistance can return to the maximum of original state again.Thousands of times repeat, and its character can not change substantially.The performance that has possessed long-term stable operation.Non-linear piezo-resistance can manufacture separate piece, externally in parallel with the arc control device of circuit breaker, combines together with arc control device.When electrical network is more than 35KV, while reaching 110,220,330KV, circuit breaker A, B, C three-phase are generally phase-splitting and independently manufacture installation.Now, nonlinear resistance separate piece directly can be attempted by respectively on each phase fracture of circuit breaker.
Claims (7)
1. the circuit breaker of not restriking, comprises arc-extinguishing chamber of circuit breaker, it is characterized in that: the described circuit breaker of not restriking also comprises non-linear pressure-sensitive unit, and the upper and lower charged position of described non-linear pressure-sensitive unit and arc-extinguishing chamber of circuit breaker fracture also connects.
2. the circuit breaker of not restriking according to claim 1, is characterized in that: described device and breaker vacuum, SF6's or the oil-filled charged position of arc control device in parallel, this device comprises the non-linear piezo-resistance unit consisting of metal oxide.
3. the circuit breaker of not restriking according to claim 1 and 2, is characterized in that:: described non-linear piezo-resistance unit is one or more non-linear piezo-resistances.
4. the circuit breaker of not restriking according to claim 3, is characterized in that:: described a plurality of non-linear piezo-resistances are that series, parallel or series connection add parallel connection.
5. the circuit breaker of not restriking according to claim 4, is characterized in that:: described non-linear piezo-resistance and arc-extinguishing chamber of circuit breaker are integrative-structure or Split type structure.
6. the circuit breaker of not restriking according to claim 5, is characterized in that:: the shape of described non-linear piezo-resistance is circle, ellipse, the square or polygonal of the porose or atresia in center.
7. the circuit breaker of not restriking according to claim 6, is characterized in that:: described non-linear piezo-resistance is the solid articles of zinc oxide or zinc oxide and the synthetic sintering of other metal oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558335.0A CN103578843A (en) | 2013-11-08 | 2013-11-08 | Non-reignition disconnector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558335.0A CN103578843A (en) | 2013-11-08 | 2013-11-08 | Non-reignition disconnector |
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| CN103578843A true CN103578843A (en) | 2014-02-12 |
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| CN201310558335.0A Pending CN103578843A (en) | 2013-11-08 | 2013-11-08 | Non-reignition disconnector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107179501A (en) * | 2017-06-20 | 2017-09-19 | 华北电力大学（保定） | A kind of single-phase circuit breaker separating brake repeated breakdown analogue experiment installation |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202138U (en) * | 1985-04-01 | 1986-03-26 | 中国科学院等离子体物理研究所 | Parallel zinc oxide over-voltage limiter for vacuum switch |
| FR2653611A1 (en) * | 1989-10-20 | 1991-04-26 | Alsthom Gec | Reactance circuit-breaker |
| CN1056373A (en) * | 1990-01-17 | 1991-11-20 | Gec阿尔斯托姆有限公司 | Produce the shunt reactor switch of low voltage impulse |
| FR2663474A1 (en) * | 1990-06-14 | 1991-12-20 | Alsthom Gec | Circuit breaker with a varistor for a high-voltage line |
| CN1063965A (en) * | 1989-11-29 | 1992-08-26 | Gec阿尔斯托姆公司 | The primary cut-out of band piezo-resistance |
| US5266758A (en) * | 1990-10-24 | 1993-11-30 | Gec Alsthom Sa | SF6 circuit breaker having an incorporated capacitor |
| CN2901563Y (en) * | 2006-05-08 | 2007-05-16 | 西安盟创电器有限公司 | Breaker protector |
| WO2011050832A1 (en) * | 2009-10-27 | 2011-05-05 | Abb Technology Ag | An hvdc breaker and control apparatus for controlling an hvdc breaker |
| CN203721607U (en) * | 2013-11-08 | 2014-07-16 | 西安盟创电器有限公司 | No-reignition breaker |
-
2013
- 2013-11-08 CN CN201310558335.0A patent/CN103578843A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202138U (en) * | 1985-04-01 | 1986-03-26 | 中国科学院等离子体物理研究所 | Parallel zinc oxide over-voltage limiter for vacuum switch |
| FR2653611A1 (en) * | 1989-10-20 | 1991-04-26 | Alsthom Gec | Reactance circuit-breaker |
| CN1063965A (en) * | 1989-11-29 | 1992-08-26 | Gec阿尔斯托姆公司 | The primary cut-out of band piezo-resistance |
| CN1056373A (en) * | 1990-01-17 | 1991-11-20 | Gec阿尔斯托姆有限公司 | Produce the shunt reactor switch of low voltage impulse |
| FR2663474A1 (en) * | 1990-06-14 | 1991-12-20 | Alsthom Gec | Circuit breaker with a varistor for a high-voltage line |
| US5266758A (en) * | 1990-10-24 | 1993-11-30 | Gec Alsthom Sa | SF6 circuit breaker having an incorporated capacitor |
| CN2901563Y (en) * | 2006-05-08 | 2007-05-16 | 西安盟创电器有限公司 | Breaker protector |
| WO2011050832A1 (en) * | 2009-10-27 | 2011-05-05 | Abb Technology Ag | An hvdc breaker and control apparatus for controlling an hvdc breaker |
| CN203721607U (en) * | 2013-11-08 | 2014-07-16 | 西安盟创电器有限公司 | No-reignition breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107179501A (en) * | 2017-06-20 | 2017-09-19 | 华北电力大学（保定） | A kind of single-phase circuit breaker separating brake repeated breakdown analogue experiment installation |
| CN107179501B (en) * | 2017-06-20 | 2023-11-17 | 华北电力大学（保定） | Single-phase breaker break-brake heavy-duty breakdown simulation experiment device |
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Application publication date: 20140212 |