CN1003024B - Vacuum on-load tap-switch with secondary energy storage device - Google Patents
Vacuum on-load tap-switch with secondary energy storage device Download PDFInfo
- Publication number
- CN1003024B CN1003024B CN85107436A CN85107436A CN1003024B CN 1003024 B CN1003024 B CN 1003024B CN 85107436 A CN85107436 A CN 85107436A CN 85107436 A CN85107436 A CN 85107436A CN 1003024 B CN1003024 B CN 1003024B
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- China
- Prior art keywords
- switch
- reversing switch
- vacuum
- energy storage
- storage device
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- 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.)
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Abstract
The present invention belongs to an electric switch. Usually, an on-load tapping switch is a device for a transformer to carry out tapping transformation under the state of excitation. The fracture capacitance of a vacuum unit of a common vacuum on-load tapping switch is the product of quadruplex load current and tapping voltage. The present invention uses a second energy storing device, which makes the fracture capacitance of the vacuum unit reduced by 4 times. Simultaneously, tungsten-copper alloy is respectively inlaid on contactors of a main reversing switch and a resistor side reversing switch. Therefore, the switch has double arc interruption capability, high reliability, protection simplification and no occurrence of short circuit in tapping. Thus, the switch can be used for a large capacity transformer with higher voltage grade.
Description
The invention belongs to appliance switch.
Usually on load tap changer is to be used for transformer carries out the tap conversion under excited state a kind of device, to reach the purpose of adjusting voltage.Loaded switch is when carrying out the tap conversion, and transition contact will be to producing electric arc, and its arc-extinguishing medium is generally used transformer oil, vacuum etc.Vacuum on-load operation switch has multiple typical circuit design by the classification of vacuum unit number.When vacuum element number is less than 3, just needs to increase some auxiliary switches (also claiming reversing switch) and match with it, to guarantee the necessary working procedure of on-load voltage regulation.When adopting two vacuum units, need two reversing switches and match as arc-control device.For example openly to specially permit described in the clear 55-110014 of communique are typical examples as accompanying drawing 1,2 to Japan Patent, and I is the odd number side of on load tap changer in the accompanying drawing, and II is the even numbers side of on load tap changer, and R is a resistance, and 9 is resistance side reversing switch, V
S1Be vacuum unit V
S2Be vacuum unit, 18 is main reversing switch, and 19 is shorting switch, and 20 is program switch.These two kinds of circuit, V in the accompanying drawing 1
S1With 9 are asymmetric working procedures, promptly as being asymmetric by central shaft in the accompanying drawing.Mix between this asymmetric working procedure is and symmetry is worked and carry out, promptly will finish in the still imperfect tense asymmetric program of symmetrical working procedure 19.Thereby in tens milliseconds, finish so complicated change action, structurally can't realize.Have only resistance side reversing switch 9 to be asymmetric working procedure in the accompanying drawing 2, other are the symmetric form working procedure.And the working procedure of resistance side reversing switch 9 was finished before other symmetrical working procedure, and the work characteristics by 9 is called sort circuit to give selects circuit.Bearing the arc extinguishing function in the symmetry working procedure, thereby must rapid movement.The deadline of general whole procedure has only tens milliseconds, and so Duan time is finished by a mechanical energy storing device rapid movement, and program can only move reciprocatingly in less than 90 ° circumference.And asymmetric working procedure 9 still to finish with an energy storage device be difficult to realize.For example Japan Patent is openly speciallyyed permit and was once proposed for the clear 55-132021 of communique number to adopt the microinching drive resistance side reversing switch 9 of drive shaft to realize giving first selection, though sort circuit structurally can be implemented vacuum unit V
S2The task of drop-out current is heavier, promptly will cut-off load current I
LAnd the circulating current I that is produced during transition between tap
cVector and, when power-factor of load cos φ=1, its value is I
Vs2=2I
LThe moment of arc extinction, act on (be commonly referred to as fracture) between contact the attempt make the voltage of arc reignition can reach U
Vs2=2U
s(U
sBe tapping voltage), this voltage U
Vs2Be called the recovery voltage between fracture.Obviously act on the fracture capacity P between fracture
Vs2=U
Vs2I
Vs2=4I
LU
s, the fracture capacity of visible vacuum unit is bigger than normal, thereby when the on load tap changer capacity increases, must change the vacuum unit of larger capacity, the specification of vacuum unit is increased, be unfavorable for product quality management and generalization, standardized designs, and cause the useful life can not be very high.
The present invention has done concrete improvement at above-mentioned shortcoming, adopts the two reversing on load tap changeres of two vacuum units that have second energy storage device, its typical circuit and working procedure such as accompanying drawing 3, U among the figure
sBe tapping voltage, I
LBe load current, other symbols are identical with accompanying drawing 1,2.The asymmetric program of sort circuit, resistance side reversing switch 9 adopts and carries out after symmetrical program is finished, and promptly asymmetrical working procedure is the back choosing, and it is just in time opposite with aforementioned circuit, and the title sort circuit selects circuit after being.The detailed operation process as shown in Figure 4, the meaning of the symbology in the accompanying drawing is the same with accompanying drawing 1,2,3.(a) is the normal operation position in the I side in the accompanying drawing 4, load current I
LDraw by short circuit contact 19; (b) open for short circuit contact 19, load current is by main reversing switch 18, vacuum unit V
S2Draw; (c) be vacuum unit V
S2Closed; (d) be vacuum unit V
S2Open, when arc extinction, load current I steering resistance side reversing switch 9 is through resistance R, vacuum unit V
S1Draw.At this moment, vacuum unit V
S2Drop-out current is load current I
L, the recovery voltage on its fracture is load current I
LPressure drop on the resistance R of flowing through, obviously its fracture capacity P
Vs2=I
LR
oI
L=U
sI
L; (e) be that main reversing switch 18 is swung to the II side by the I side, at this moment, this switch is at vacuum unit V
S2Down action of open-circuit condition is so drop-out current not plays the bridge joint effect on the circuit; (f) be vacuum unit V
S2Closure, at this moment load current I
LChange to the II side by I immediately, because voltage U between tap
sEffect, produced a circulating current I
c, its value is determined by the size of R, is worked as R=U
s/ I
LThe time; I
c=U
s/ R=I
L; (g) be vacuum unit V
S1Open drop-out current I
Sv1=I
c=I
L, the recovery voltage U between fracture
Sv1U
s, obviously the fracture capacity also is P
Sv1=I
LU
s, load current I
LCurrent through line is constant; (h) be shorting switch 19 closures, load current is drawn through shorting switch 19 by the II side; (k) resistance side reversing switch 9 is at vacuum unit V
S1Swing to the II side by I under the open-circuit condition, thereby finished the overall process of being switched to II by the tap I, vice versa.After selecting circuit after main points of the present invention as seen from the above analysis are to adopt, the fracture capacity of vacuum unit has only 1/4th of aforementioned capacity, the fracture load of loaded switch is alleviated greatly, thereby the onesize vacuum unit of use and aforementioned circuit design, its scope of application has increased greatly, only the capacity difference of shorting switch 19.So not only be convenient to the management of product quality, also reduced cost, standardization, the seriation of vacuum on-load operation switch are implemented easily.
Realize the detail design of foregoing circuit, having only an energy storage device also is to be difficult to realize that first energy storage device can only be finished the working procedure part of symmetry, and must consider in addition for asymmetric program reversing switch 9.Therefore the present invention has just introduced the notion of second energy storage device, this is an outstanding feature of the present invention, and it implements sketch as shown in Figure 5, and 2 is rivet among the figure, 3 is steel plate washer, 4 is the protruding dish of arc, and 5 is quick rotating shaft, 17 for key etc. these all belong to the parts on first energy storage device, and 1 be insulation framework among the figure, 6 is rocking arm, and 7 is spring hanging plate, and 8 is main spring, 10 is the reversing switch contact, 11 is flexible connection piece, and 12 is the tungsten copper contact, and 13 for striking the post surely, 14 is the tungsten copper contact, 15 is the retaining nail, and 16 is bumper, and 21 is that axle etc. has been formed second energy storage device.It is one and crosses the stored energy mechanism that the dead point discharges, it also is the specialized agency that is provided with for asymmetric program, second energy storage device is that the quick rotating shaft 5 that first energy storage device drives is provided with the protruding dish 4 of arc, the protruding dish 4 of its arc is insulators that have steel skeleton, when it drives rocking arm 6 revolutions, guarantee rocking arm 6 mutually insulateds on the three-phase.Rotating shaft 5 is under first energy storage device drives fast, when rotating with angular velocity omega in a direction indicated by the arrow, α angle of elder generation's idle running always drives the retaining nail 15 of rocking arm 6 then, rocking arm 6 is rotated in the direction of arrows, at this moment, reversing switch 9 also is failure to actuate, the just 8 beginning energy storage of the main spring in second energy storage device, when the center of axle * reversing switch 9 is passed through at rocking arm 6 centers, reversing switch 9 under the effect of main spring 8, the I side of the contact 14 that speeds away around axle 21 to the II side rotate the movement velocity of reversing switch 9 and cut-off distance be give according to the rated capacity of on load tap changer earlier given.After rocking arm 6 is broken through the dead point, under the pulling force of main spring 8, continue to rotate forward, be cushioned 16 stop of retaining at last, thereby structurally finished asymmetric working procedure requirement, circuit of the present invention is implemented.Reverse operating (being that II is to the I side) situation is identical.
Because main reversing switch 18 and resistance side reversing switch 9 are driven by first, second energy storage device respectively, obviously the both is the switch of rapid movement, so it is not difficult that the both is designed to have the switch that cut-offs load current.Consider that vacuum unit is out of order gas leakage can not cut-off electric arc the time, from the program of accompanying drawing 3 as seen, during the reversing switch action, on the contact of reversing switch, must produce electric arc, thereby reversing switch contact 12,14 of the present invention studs with the tungsten-copper alloy of anti-electric arc respectively, thereby makes on load tap changer have the ability of dual current interruption.Even vacuum unit is out of order, switch still can operate as normal, thereby the reliability of on load tap changer is improved greatly.
Because reversing switch has the ability of drop-out current, thereby the fault detect of vacuum on-load operation switch is simplified greatly.The protection relay of general on load tap changer fault detect has only the tripping operation contact, just can only detect the fault that is produced when loaded switch grease chamber internal pressure sharply increases.The present invention adopts the signal contact of the Buchholz relay that general transformer uses to detect, and the function of signal contact is to collect the gas of loaded tap switch oil chamber interior, and relay just sends signal when gas increases.When vacuum unit was out of order, the reversing switch contact must produce electric arc, and electric arc will decompose transformer oil and produce gas.After Buchholz relay is collected gas, will move.Whether thereby it is working properly to detect vacuum unit.Because reversing switch has the ability of cut-offfing electric arc, thereby do not have short circuit generation between tap, this also is different from an important feature of other vacuum on-load operation switch.
In sum, it is light that vacuum on-load operation switch of the present invention has the current interruption load, has dual current interruption ability, the reliability height, and protection is simplified, and short circuit takes place between no tap, thereby can be used in the high-power transformer of high voltage grade.
Claims (2)
1, a kind of vacuum on-load operation switch has odd number side I and even numbers side II, is provided with shorting switch 19 between the two, resistance side reversing switch 9, vacuum unit V
S1, V
S2With main reversing switch 18, it is characterized in that for resistance side reversing switch 9 is provided with second energy storage device separately, so that make reversing switch 9 always after symmetrical working procedure is finished, carry out fast and reliable and switch.
2,, it is characterized in that this resistance side reversing switch 9 that has second energy storage device is being supported by insulation framework 1 to strike the post 13 surely reversing switch 9, axle 21, rocking arm 6 and bumper 16 according to the described vacuum on-load operation switch of claim 1; On rocking arm 6, be provided with retaining nail 15, reversing switch 9 is provided with reversing switch contact 10 and tungsten copper contact 12, be provided with tungsten copper contact 14 on 13 striking the post surely, main spring 8 hangs on reversing switch 9 and the rocking arm 6 by spring hanging plate 7, and by axle 21, surely strike the post 13 and retaining nail 15 make it the location, when first stored energy mechanism discharges, when driving the protruding dish of arc 4 rotation alpha angles, the protruding dish 4 of arc will promote rocking arm 6 and rotate, main spring 8 is stretched and energy storage, and when the inclined to one side mistake of spring tension direction central shaft 21, reversing switch 9 switches to opposite side around axle 21 by a side under torsional interaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85107436A CN1003024B (en) | 1985-09-18 | 1985-09-18 | Vacuum on-load tap-switch with secondary energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85107436A CN1003024B (en) | 1985-09-18 | 1985-09-18 | Vacuum on-load tap-switch with secondary energy storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107436A CN85107436A (en) | 1986-07-02 |
| CN1003024B true CN1003024B (en) | 1989-01-04 |
Family
ID=4795629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85107436A Expired CN1003024B (en) | 1985-09-18 | 1985-09-18 | Vacuum on-load tap-switch with secondary energy storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003024B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832075A (en) * | 2011-06-15 | 2012-12-19 | 上海华明电力设备集团有限公司 | Double vacuum tube transition circuit of vacuum on-load tap-changer |
| CN113745014B (en) * | 2021-07-27 | 2022-10-04 | 中国电力科学研究院有限公司 | On-load tap-changer's reciprocating type switching mechanism |
-
1985
- 1985-09-18 CN CN85107436A patent/CN1003024B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85107436A (en) | 1986-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| CI01 | Correction of invention patent gazette |
Correct: Shenyang Transformer Factory False: Shenyang Transformer Mfg. Factory Number: 7 Page: 75 Volume: 2 |
|
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ERR | Gazette correction |
Free format text: CORRECT FROM: SHENYANG TRANSFORMER MFG. FACTORY TO: SHENYANG TRANSFORMER FACTORY; FROM: LIAOYANG CITY PATENT OFFICE TO: SHEN YANGSHI PATENT OFFICE |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |