CN103021642A - On-load tapping switch - Google Patents
On-load tapping switch Download PDFInfo
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- CN103021642A CN103021642A CN2011102791649A CN201110279164A CN103021642A CN 103021642 A CN103021642 A CN 103021642A CN 2011102791649 A CN2011102791649 A CN 2011102791649A CN 201110279164 A CN201110279164 A CN 201110279164A CN 103021642 A CN103021642 A CN 103021642A
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- pressure regulation
- power switch
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- 238000010079 rubber tapping Methods 0.000 title abstract 6
- 230000033228 biological regulation Effects 0.000 claims abstract description 70
- 238000004804 winding Methods 0.000 claims abstract description 62
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 3
- 230000037361 pathway Effects 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000011438 cord wood Substances 0.000 description 6
- 239000012467 final product Substances 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
The invention provides an on-load tapping switch. The on-load tapping switch comprises a switch control loop and bypass loops, wherein the switch control loop consists of an electronic power switch basic assembly and is connected with an outgoing line of a transformer regulating winding; the bypass loops are connected with two ends of the switch control loop in parallel; the electronic power switch basic assembly comprises a path switch pathway which consists of electronic power switches and a crossing switch pathway which consists of electronic power switches; one end of a path switch is connected with the outgoing line of one end of the transformer regulating winding in series and is further connected with one end of a crossing switch in parallel; the other end of the crossing switch is connected with the next group basic assembly in series; a connection line led from the serial connection point is connected with the other end of the regulating winding, so that the on-load tapping switch can bear any high pressure regulation. The on-load tapping switch provided by the invention is simple in control method, can reduce the use quantity of the electronic power switches in the electronic on-load tapping switch, thereby reducing the manufacturing cost.
Description
Technical field
The present invention relates to the on load tap changer technology that the transformer on load voltage is adjusted in the electric power system, arc suppression coil is transferred the switching technology such as circle.
Background technology
At present, the voltage adjustment in the operation of power networks mainly relies on on-load tap changers of transformers and realize, and existing on load tap changer is mechanical type.Although it is ripe that mechanical type on load tap changer technology is tending towards, its intrinsic problem can't solve, and is difficult to break through.Intrinsic problem is: when (1) is adjusted electrical network is produced overvoltage and impact inevitable; (2) easily produce electric arc in the handoff procedure, make the transformer oil polarization, cause frequent maintenance; (3) can not be fast, the frequent adjusting; (4) unsuitable phase-splitting is regulated.
After powerful electronic power switch (bidirectional triode thyristor, thyristor etc.) comes out, Chinese scholars, engineers and technicians attempt to substitute the mechanical type on load tap changer with the turn-on and turn-off characteristic of electronic power switch.This substituting is feasible on the principle, but how to substitute, and technology, economy are just feasible but to have become problem, so that studies more than 20 year, and technology still there is not moulding.
General Study is started with from directly substituting, and illustrates:
The transformer voltage amplitude of accommodation of traditional structure is ± 10%, single phase winding is formed by connecting by main winding L0 and 8 pressure regulation windings (regulated quantity of each pressure regulation winding is 2.5% for L1, L2---L8), 9 lead-out wires form 9 tap branch roads (K0, K2---K8); Or be formed by connecting by main winding L0 and 16 pressure regulation windings (regulated quantity of each pressure regulation winding is 1.25% for L1, L2---L16), 17 lead-out wires form 17 tap branch roads (K0, K2---K16).
Directly substitute shunting switch with the bi-directional electric power electronic switch, alternative connection principle is seen accompanying drawing 1 (8 single-phase elementary diagrams of pressure regulation winding).Draw from elementary diagram, this alternative wiring is clear, and is simple.
By analyzing this new problem, the maximum steady state voltage problem of every branch road of having produced that directly substitute.When the conducting of K0 branch road, K4 branch road maximum steady state voltage is 4 times of single pressure regulation winding, and the maximum steady state voltage of K8 branch road is the twice of K4 branch road, 8 times of single pressure regulation winding; When the conducting of K8 branch road, K4 branch road maximum steady state voltage is 4 times of single pressure regulation winding, and the maximum steady state voltage of K0 branch road is the twice of K4 branch road, 8 times of single pressure regulation winding.If the voltage-regulation amplitude is ± 10%, then branch road maximum steady state voltage=0.2 * rated voltage
Only bear branch road maximum steady state voltage with a bidirectional triode thyristor such as each branch road, bidirectional triode thyristor (the repetitive peak reverse voltage V that produces at present
RRMMaximum can only be accomplished 8000V), can only satisfy this wiring of 10KV electric pressure and use, but economy is bad.35KV and above can only adopt multistage controllable silicon in serial connection to bear branch road maximum steady state voltage.Solve the pressure-bearing problem with the multitube series connection, not only economic index is bad, and it is too many number of devices to have occurred again, produces pipe series connection use problem, causes technical sophistication.
Above-mentioned technology, economic two large problems are perplexing the researcher just, are difficult to break through to the 35KV electric pressure so that this substitutes.
Summary of the invention
In sum, if find the shunting switch electrical main connecting wire form that reduces branch road maximum steady state voltage, to technical solution, economic two large problems, certainly useful.
Main contents of the present invention are as follows:
On load tap changer of the present invention comprises electronic power switch infrastructure component switch control circuit that form, that link to each other with the transformer regulating winding leading-out wire, be connected in parallel on the bypass loop at switch control circuit two ends, described electronic power switch infrastructure component comprises the channel selector path that is made of electronic power switch and the switch ways of passing by on one's way that is made of electronic power switch; One end of channel selector is connected with described transformer regulating winding one end lead-out wire, and way switch one end is in parallel again with excessively, crosses the other end of way switch and connects with next group infrastructure component; It is connected in series a line of drawing at a place and is connected with the other end of pressure regulation winding.
The electronic power switch infrastructure component can connect into alphabetical n shape assembly by a channel selector with by a mistake way switch, and channel selector and mistake way switch are respectively on the two legs of n; With two n shape assemblies, it is crossed way switch and connects to form m shape assembly by connecting, and it is connected in series a place and draws a line; Switch control circuit can have N electronic power switch infrastructure component to be in series, wherein N 〉=1; The electronic power switch of electronic power switch infrastructure component is bidirectional triode thyristor or thyristor.
Compare with the mechanical type on load tap changer, mechanical intrinsic problem has not had; Compare with direct substituted type with mixed type, the present invention has the following advantages:
1, with the electronic power switch device of minimum number, solve the on-load voltage regulation problem of each electric pressure, cost is minimum.
2, cordwood system type pressure regulation n modular construction is simple, and wiring is clear.
3, cordwood system type n pressure regulation unit control method is simple, motion device minimum number, only 2.
4, cordwood system type pressure regulation n assembly connects the number no requirement (NR), can select as required, and the transformer that requires for extraordinary pressure regulation provides convenience, flexibly pressure regulation means.
Description of drawings:
1,8 single-phase elementary diagram of pressure regulation winding of accompanying drawing.
Accompanying drawing 2, electronic building block type pressure regulation n assembly and package assembling thereof.
Accompanying drawing 3, arbitrarily N the on load tap changer key wiring diagram that the pressure regulation units in series forms.
Accompanying drawing 4, electronic building block type pressure regulation m assembly and package assembling thereof.
The on load tap changer electrical wiring schematic diagram that the series connection of 5,4 m pressure regulation of accompanying drawing assembly forms.
Embodiment:
By analyzing, the branch road steady state voltage increases, and affected by pressure regulation winding electric gas connected mode, if change its connected mode, just can effectively reduce each branch road maximum steady state voltage.
The present invention utilizes the existing ripe electronic power switch of producing, for example bidirectional triode thyristor or thyristor, change traditional connected mode, by it is carried out multiple combination, form a kind of novel on load tap changer, and by the simple lead-out wire form that changes the transformer regulating winding, make electronic building block type pressure regulation assembly, reach with minimum electronic power switch device, solve the transformer on-load voltage regulating problem of each electric pressure, effectively reduced each branch road maximum steady state voltage.
, disconnected on request at inner transformer main winding and the pressure regulation winding that connects of transformer originally, formed a plurality of independent pressure regulation windings, and each was independently drawn at pressure regulation winding head and the tail two ends, directly do not connect on each pressure regulation winding is electric.On load tap changer and pressure regulation winding correspondence are joined, consist of the pressure regulation assembly.
The electronic power switch infrastructure component of on load tap changer of the present invention can connect into alphabetical n shape assembly by a channel selector with by a mistake way switch, and channel selector and mistake way switch are respectively on the two legs of n.N shape assembly has three terminals, and the upper left corner is terminal 1, and the lower end of the left leg of n assembly is terminal KL, and the lower end of the right leg of n assembly is terminal K1, and two electronic power switches are on the two legs of n; The pressure regulation n assembly of on load tap changer is connected in series by cordwood system type, sees accompanying drawing 2; A shutoff in service, conducting, each other a locking.When the K1 conducting, the institute's pressure regulation winding that connects access, because K2 is off state, electric current flows by pressure regulation winding and path electronic power switch.When K1 turn-offed, the pressure regulation winding that connects withdrawed from, and because K2 is conducting state, electric current flows by the electronic power switch of passing by on one's way.
The maximum steady state voltage that K1, K2 bear is the voltage that a pressure regulation winding produces.
Peg graft for convenient, can encapsulate the n assembly, n assembly after the encapsulation has four terminals, be respectively: the left and right leg of n assembly claims terminal KL to be connected the terminal that is connected with the pressure regulation winding with K1), former upper left corner terminal 1 (tandem connection terminal) is drawn terminal K1 a terminal 2 (tandem connection terminal) again from the upper right corner.
A n assembly and a pressure regulation winding connect into a n pressure regulation unit; The left end lead-out wire of a pressure regulation winding of terminal KL connection transformer of n assembly behind the right-hand member lead-out wire of a pressure regulation winding of terminal K1 connection transformer, is drawn a terminal 2, forms n pressure regulation unit, with the access of control pressure regulation winding with withdraw from.Path electronic power switch conducting in the n pressure regulation unit, the electronic power switch of passing by on one's way turn-offs, and the pressure regulation winding accesses main electric loop, has increased the Transformer Winding number of turn; The path electronic power switch turn-offs in the n pressure regulation unit, the electronic power switch conducting of passing by on one's way, and the pressure regulation winding withdraws from main electric loop, has reduced the Transformer Winding number of turn.
By the on load tap changer key wiring diagram that any N pressure regulation units in series forms, see accompanying drawing 3.The right terminal 2 of n pressure regulation unit and 1 series connection of next pressure regulation unit left terminal, string is formed with on-load shunting switch to satisfying the pressure regulation proportion requirement; Pressure regulation is simple, as heightens secondary voltage, withdraws from the winding in former limit and gets final product, as turn down secondary voltage, drops into the winding in former limit and gets final product.
For reducing the lead-out wire number of transformer regulating winding, can change, with two n shape assemblies, it is crossed way switch and connects to form m shape assembly by connecting, it is connected in series a place and draws a line, forms electronic building block type pressure regulation m assembly and package assembling thereof, sees accompanying drawing 4.
Wherein: two adjacent pressure regulation windings, after inner abutting end connects, draw a line; A line is respectively drawn at two ends in addition, totally three lead-out wires; Two electronic building block type n assemblies, mirror image connects, and forms the m assembly, and the m assembly after the encapsulation has five terminals, terminal 1 and 2 (tandem connection terminal); Terminal KL, KL1 are connected the terminal that is connected with the pressure regulation winding with K1); Three terminal KL, KL1 of m assembly and K1 with are connected three lead-out wires of a pressure regulation winding and connect, form m pressure regulation unit.
After the series connection of 4 m assemblies, and to be connected a pressure regulation winding and to connect, the on load tap changer electrical schematic diagram of formation is seen accompanying drawing 5.
Its connected mode also can be to be connected on demand on load tap changer by n assembly and m assembly.Each pressure regulation branch road maximum steady state voltage is minimum, be the voltage that a pressure regulation winding produces, and each branch road steady state voltage equates.The access of a pressure regulation winding or withdraw from only needs to change in the n assembly by the control switch loop that 2 electronic power switches turn-off and conducting state gets final product the motion device minimum number.
Can there be N electronic power switch infrastructure component to be in series in the on load tap changer switch control circuit in above-mentioned several connected mode, wherein N 〉=1.
The present invention also increases bypass loop in regulating loop, when dropping into to solve transformer, the initial Input of pressure regulation winding is seen bypass segment in the accompanying drawing 5.Bypass loop is comprised of a circuit breaker and shunting device, sees bypass segment in the accompanying drawing 5.Behind the electronic power switch of passing by on one's way that conducting is all, circuit breaker disconnects bypass loop.Detect by current over-zero, send control command, the electronic power switch of passing by on one's way of cordwood system type pressure regulation n assembly is turn-offed, the conducting of path electronic power switch makes the access of pressure regulation winding, until satisfy voltage request; When needs access pressure regulation winding, repeated for the 5th step.If withdraw from the pressure regulation winding, detect by current over-zero, send control command, the path electronic power switch of cordwood system type pressure regulation n assembly is turn-offed, the electronic power switch conducting of passing by on one's way is withdrawed from the pressure regulation winding.
When the transformer secondary voltage is on the low side, need to heighten, just send the instruction of withdrawing from a pressure regulation winding in former limit (high-pressure side), reduce former limit winding access number, increase no-load voltage ratio, reach the purpose of heightening secondary voltage.When the transformer secondary voltage is higher, need to turn down, just send the instruction of a pressure regulation winding of access in former limit (high-pressure side), increase former limit winding access number, reduce no-load voltage ratio, reach the purpose of turning down secondary voltage.
All wiring of above-mentioned accompanying drawing are single-phase, and the three-phase connection principle is similar.
On load tap changer of the present invention also can connect the winding configuration equipment such as arc suppression coil.
The connected mode of on load tap changer of the present invention is not limited to the connected mode of n shape as herein described or m shape, and other roughly the same connections that belong to this design all fall within protection scope of the present invention.
Claims (5)
1. on load tap changer, comprise electronic power switch infrastructure component switch control circuit that form, that link to each other with the transformer regulating winding leading-out wire, be connected in parallel on the bypass loop at switch control circuit two ends, it is characterized in that: described electronic power switch infrastructure component comprises the channel selector that is made of electronic power switch and the excessively way switch that is made of electronic power switch; One end of channel selector is connected with described transformer regulating winding one end lead-out wire, and way switch one end is in parallel again with excessively, crosses the other end of way switch and connects with next group infrastructure component; It is connected in series a line of drawing at a place and is connected with the other end of pressure regulation winding.
2. on load tap changer according to claim 1 is characterized in that: the electronic power switch infrastructure component can and be crossed way switch by one by a channel selector connect into alphabetical n shape assembly, channel selector and cross way switch respectively on the two legs of n.
3. on load tap changer according to claim 2 is characterized in that: with two n shape assemblies, it is crossed way switch and connects to form m shape assembly by connecting, and it is connected in series a place and draws a line.
4. described on load tap changer according to claim 1-3, it is characterized in that: switch control circuit can have N electronic power switch infrastructure component to be in series, wherein N 〉=1.
5. on load tap changer according to claim 4, it is characterized in that: the electronic power switch of electronic power switch infrastructure component is bidirectional triode thyristor or thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110279164.9A CN103021642B (en) | 2011-09-20 | 2011-09-20 | A kind of load ratio bridging switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110279164.9A CN103021642B (en) | 2011-09-20 | 2011-09-20 | A kind of load ratio bridging switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103021642A true CN103021642A (en) | 2013-04-03 |
| CN103021642B CN103021642B (en) | 2017-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110279164.9A Expired - Fee Related CN103021642B (en) | 2011-09-20 | 2011-09-20 | A kind of load ratio bridging switch |
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| Country | Link |
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| CN (1) | CN103021642B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113317A (en) * | 2014-06-12 | 2014-10-22 | 山东大学 | Bypass auxiliary on-load tap-changer and method thereof |
| CN105826063A (en) * | 2016-05-30 | 2016-08-03 | 东北农业大学 | Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1244358A (en) * | 1967-12-06 | 1971-09-02 | Egon Scheubeck | Improvements in on-load tap-changing arrangements for three phase transformers |
| CN2896468Y (en) * | 2006-06-02 | 2007-05-02 | 郑州大学 | Staged loaded pressure-regulation switch |
| CN101430967A (en) * | 2008-08-21 | 2009-05-13 | 上海华明电力设备制造有限公司 | Thyristor resistor transition switching on-load tap-changer |
| CN102208265A (en) * | 2011-03-01 | 2011-10-05 | 中国农业大学 | On-load tapping switch of composite switching-type transformer |
-
2011
- 2011-09-20 CN CN201110279164.9A patent/CN103021642B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1244358A (en) * | 1967-12-06 | 1971-09-02 | Egon Scheubeck | Improvements in on-load tap-changing arrangements for three phase transformers |
| CN2896468Y (en) * | 2006-06-02 | 2007-05-02 | 郑州大学 | Staged loaded pressure-regulation switch |
| CN101430967A (en) * | 2008-08-21 | 2009-05-13 | 上海华明电力设备制造有限公司 | Thyristor resistor transition switching on-load tap-changer |
| CN102208265A (en) * | 2011-03-01 | 2011-10-05 | 中国农业大学 | On-load tapping switch of composite switching-type transformer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113317A (en) * | 2014-06-12 | 2014-10-22 | 山东大学 | Bypass auxiliary on-load tap-changer and method thereof |
| WO2015188645A1 (en) * | 2014-06-12 | 2015-12-17 | 山东大学 | Bypass auxiliary on-load tap-changer and method thereof |
| CN104113317B (en) * | 2014-06-12 | 2017-02-15 | 山东大学 | Bypass auxiliary on-load tap-changer and method thereof |
| CN105826063A (en) * | 2016-05-30 | 2016-08-03 | 东北农业大学 | Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer |
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| CN103021642B (en) | 2017-03-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100191 room Executive Hotel, Garden Road, Beijing, Haidian District, room 30, 6418 Applicant after: Zhang Wei Applicant after: Yuan Jiatao Address before: 100096, Beijing, Haidian District Qinghe Longgang Road, Lane 2, building 12, unit 1211 Applicant before: Zhang Wei Applicant before: Yuan Jiatao |
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Addressee: Zhang Wei Document name: Notification of Passing Examination on Formalities |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Yu Inventor after: Huang Naiping Inventor after: Zhou Qingdao Inventor after: Wang Zhenming Inventor after: Li Hongping Inventor before: Yuan Jiatao Inventor before: Zhang Wei |
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| COR | Change of bibliographic data | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170120 Address after: 464100 Pingqiao Town, Pingqiao District, Henan, China, Applicant after: Datang XinYang Electric Power Generation Co., Ltd. Address before: 100191 room Executive Hotel, Garden Road, Beijing, Haidian District, room 30, 6418 Applicant before: Zhang Wei Applicant before: Yuan Jiatao |
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| CF01 | Termination of patent right due to non-payment of annual fee |