CN116783676A - Switch module and on-load tap changer with a switch module - Google Patents
Switch module and on-load tap changer with a switch module Download PDFInfo
- Publication number
- CN116783676A CN116783676A CN202180087756.2A CN202180087756A CN116783676A CN 116783676 A CN116783676 A CN 116783676A CN 202180087756 A CN202180087756 A CN 202180087756A CN 116783676 A CN116783676 A CN 116783676A
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- switching
- load
- switch module
- switch
- plate
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- 238000004804 winding Methods 0.000 claims abstract description 30
- 238000012546 transfer Methods 0.000 claims abstract description 22
- 238000010079 rubber tapping Methods 0.000 claims abstract 3
- 238000012986 modification Methods 0.000 description 15
- 230000004048 modification Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 10
- 238000011161 development Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000012777 electrically insulating material Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0044—Casings; Mountings; Disposition in transformer housing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/08—Arrangements to facilitate replacement of a switch, e.g. cartridge housing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to a switching module (10) for an on-load tap changer (20) for switching a winding tap (N) of a step transformer (1) 1 、……、N J 、……、N N ) And a switching module for switching between the switching modules, the switching module comprising: a selector unit (30) for powerless pre-selection of the selected winding tap (N J ) Applying; a load transfer switch unit (40) for tapping a load from a previous winding (N J1 ) Actually switching to the preselected winding tap (N J ) Applying; -a plate (50) on which the selector unit (30) and the load transfer switch unit (40) are arranged; wherein the load transfer switch unit (40) is provided on a separate box (60), theThe cassette is releasably connected to the plate (50).
Description
Technical Field
The invention relates to a switching module for an on-load tap changer for uninterrupted switching between winding taps of a step transformer and to an on-load tap changer having such a switching module.
Background
On-load tap changers enable the transmission ratio of the transformer to be changed under load and are sufficiently known from the prior art. The on-load tap-changer typically has a load transfer switch and a selector. For uninterrupted switching, the load transfer switch is equipped with switching devices, for example vacuum switching tubes and switching resistors, which are arranged in a cylinder-shaped container filled with oil. The selector is typically arranged below the load transfer switch container and is made up of a plurality of rods arranged in a circle. On these bars, contacts are provided in different planes, which serve as connectors for the adjusting winding. Within the selector, two selector arms are fixed to one switch post. These selector arm contacts make contact on the lever. The load transfer switch and the selector are connected to each other via a transmission. The motor drive is arranged on the outside of the adjustable transformer and is connected to the on-load tap changer via a connecting rod.
In another construction of the on-load tap-changer, the so-called load selector, which is structurally different from the on-load tap-changer described in the previous paragraph, but is also known, the functions of the selector and the switch are combined in one switch. This means: the selector and the load transfer switch are not spatially separated from each other but are disposed in a common oil container.
The following applies to both structures: the load changeover switch or the load selector may be detached from the oil container during an upcoming repair or maintenance work. This is done from above via the cover of the transformer housing.
At the same time, in addition to the two described configurations, there are new forms of tap changers which have a fundamentally different design without an oil container and thus require new approaches for maintenance or repair.
Disclosure of Invention
It is therefore an object of the present invention to provide a solution for repairing and maintaining an on-load tap changer and/or an on-load tap changer assembly without an oil container, which solution enables a quick and easy replacement of the on-load tap changer service-related or repair-required on-load tap changer assembly.
The object is achieved by the respective subject matter of the independent claims. Other embodiments are the subject matter of the dependent claims.
According to a first aspect of the development, a switching module for an on-load tap changer for uninterrupted switching between winding taps of a step transformer is provided.
The switch module includes: a selector unit for powerless pre-selection onto a selected winding tap, a load switching unit for actually switching a load from a previous winding tap onto the preselected winding tap, and a board on which the selector unit and the load switching unit arrangement are arranged.
The load transfer switch unit is arranged on a separate box, which is releasably connected to the plate.
The load transfer switch unit of the on-load tap-changer is a component that determines the switching power of the on-load tap-changer, i.e. the limited number of possible transfer processes to be performed, and is thus in particular service-dependent. By providing the switching device of the load changeover switch on a separate releasable unit, the unit can be easily replaced together with the switching device without modification or dismantling measures having to be taken on the tap changer.
The plate and the cassette may be constructed in any manner and method, for example as a plate-shaped injection molding. The plates and the box may be constructed of plastic, such as thermoplastic or fiberglass reinforced plastic, or any other electrically insulating material.
According to a preferred embodiment, the load transfer switching unit comprises at least one vacuum switching tube and/or at least one power electronic switching element and/or at least one mechanical switching element, which may be configured as a bridge switch, for example. The power electronic switching device may be configured, for example, as an IGBT and/or a thyristor.
The bridge switch may be configured in any manner, such as a rotary switch, a sliding switch, or a flip switch. The bridge switch may be operated by linear or rotational movement.
The selector unit may be constructed in any manner and method and has, for example, one or more movable selector contacts. The movable selector contacts may be configured in any manner and method, such as radially movable contact fingers. Manipulation of the movable selector contact may also be performed in any manner and method, for example via a maltese wheel or a gear. Furthermore, the selector has a plurality of fixed contacts, which can be connected to winding taps of the adjustable transformer. The fixed contact may be arranged on the plate in any manner and method such that the fixed contact can be brought into contact with the movable selector contact or contacts. The stationary contacts are arranged, for example, radially on the plate.
According to another embodiment, the cartridge has a first side and a second side opposite the first side. The at least one vacuum switching tube and/or the at least one electronic switching element are arranged on the first side. The at least one mechanical switching element is arranged on the second side.
According to another embodiment, the plate has a recess with an open side, which recess comprises means for guiding on at least two inner walls, via which means for guiding at least two side walls of the cassette can be inserted into the recess, so that the cassette is fixed in the inserted state and flush with the plate.
The means for guiding may be configured in any way and method, for example as a groove in connection with the guide rail and/or the roller.
For inserting and extracting the cartridge, a handle is preferably provided on the cartridge.
The cassette may be secured in the recess of the plate by suitable means. This may be done, for example, with bolts and/or with other locking means, both to move the bolts through the cassette and to move the bolts through the plate.
According to another embodiment, the switch module has at least one electrical interface via which a first wire assigned to the cassette and a second wire assigned to the board can be connected to each other. Here, the arrangement means in particular that the plate or the cassette remains in the pulled-out state of the cassette.
The electrical interface may be constructed in any manner and method.
According to one embodiment, the electrical interface is configured as a threaded connection.
According to another embodiment, the electrical interface is configured as a contact system comprising a contact bridge, a first plug contact assigned to the cartridge and a second plug contact assigned to the plate. The first plug contact is releasably connected to the contact bridge. In particular, the first plug contact can be plugged and/or inserted into the contact bridge, and the contact bridge is arranged on the board.
The contact bridge may be constructed in any manner and method. The contact bridge can be formed, for example, from two fixed contacts which are arranged at a distance from one another and opposite one another such that the plug contacts can be plugged and/or inserted between the fixed contacts. The fixed contacts can be held in place, for example, by means of guide pins and can be pressed against one another and against the inserted plug contacts by means of spring forces, so that the fixed contacts are electrically bridged and electrically connected to one another.
According to a second aspect of the development, an on-load tap changer for uninterrupted switching between winding taps of a step transformer is presented. The on-load tap-changer comprises at least one switching module constructed according to the first aspect of the development.
According to a preferred embodiment, the on-load tap changer for the second and third phases to be regulated of the step transformer has a second and a third switching module which are constructed according to the first aspect of the development.
Drawings
The invention is described in detail below with reference to the drawings by means of exemplary embodiments. Identical or functionally identical components may be provided with the same reference numerals. The same components or components having the same functions may be described only with respect to the drawings in which they first appear. The description need not be repeated in subsequent figures. The drawings illustrate only embodiments of the invention and are not intended to limit the invention to the embodiments shown.
In the accompanying drawings
FIG. 1 illustrates a schematic diagram of an exemplary embodiment of an on-load tap changer;
fig. 2 shows a perspective view of an exemplary embodiment of a switching module according to a modification;
fig. 3 shows a detailed view of an exemplary embodiment of a switching module according to a modification;
fig. 4 shows a perspective view of a detailed view of an exemplary embodiment of a cassette of a switch module according to a modification;
FIG. 5 shows another detailed view of the cartridge of FIG. 4 according to a modification;
fig. 6 shows a perspective view of a detailed view of another exemplary embodiment of a cassette of a switch module according to a modification;
FIG. 7 shows another detailed view of the cartridge of FIG. 6 according to a modification;
fig. 8 shows another detailed view of the switching module of the embodiment of fig. 6 and 7 according to a modification;
fig. 9 shows a perspective view of an exemplary embodiment of an on-load tap changer with a switching module according to a modification.
Detailed Description
An exemplary embodiment of an on-load tap changer 20 for a step transformer 1 is schematically shown in fig. 1. The variable transformer 1 has a main winding 2 and a regulating winding 3 with different winding taps N 1 、……、N J 、……、N N The winding taps are turned on or off by the on-load tap-changer 20. To this end, the on-load tap changer 20 includes: a selector 30, which can contact different winding taps N of the regulating winding 3 by means of two movable selector contacts 1 、……、N J 、……、N N The method comprises the steps of carrying out a first treatment on the surface of the And a load transfer switch 40 that performs the actual load transfer from the currently on winding tap to the new preselected winding tap. In the position of the load changeover switch 40 shown in fig. 1, the load current is tapped from the currently switched-on winding tap N J+1 Flows to the load lead 21 via the corresponding selector contact and load transfer switch 40.
Fig. 2 shows a perspective view of an exemplary embodiment of a switching module according to a further development. The switch module 10 includes a plate 50 constructed of plastic, such as fiberglass reinforced plastic or other electrically insulating material. The plate 50 is configured as a milling part which is produced later by means of an injection molding method. A selector unit 30 and a load changeover switch unit 40 are provided on the board 50. A non-power fixed contact 31 is preselected via a selector unit 30, which in turn is electrically connected to a winding tap (not shown) of the adjustable transformer. The load transfer switch unit 40 is located on a separate box 60 which is inserted into the recess 51 of the plate 50 and is flush with the plate 50.
Furthermore, the drive unit 25 on the board 50 is substantially disposed between the selector unit 30 and the load changeover switch unit 40. The drive unit 25 is fixedly connected to a drive shaft (not shown). The drive shaft and thus the drive unit 25 is driven by a motor drive (not shown).
A detailed view of an exemplary embodiment of a switching module according to a modification is shown in fig. 3. Here, the cartridge 60 is in the pulled-out state. By means of the handle 64, the cartridge 60 can be inserted into the recess 51 of the plate 50 and can be extracted. For this purpose, the plate 50 has means 53 for guiding, which are embodied here as grooves, on the inner wall 52 of the recess 51. In this way, service-related switching devices of the load transfer switch unit 40 may be simply removed from the board 50, replaced or repaired and reloaded via the cassette 60.
Fig. 4 and 5 show perspective views of detailed views of an exemplary embodiment of a cassette of a switch module according to a modification, respectively.
The box 60 to which the switching devices of the load changeover switch unit 40 are mounted is shown in detail in the two figures. Fig. 4 shows a first side 61 of the cassette 60 provided with the vacuum interrupter 41, and fig. 5 shows a second side 62 of the cassette 60 carrying the mechanical switching element 42, which is configured as a linearly actuable bridge switch. The cassette 60 further comprises a plurality of wires 11 extending from the first side 61 partly through the cassette 60 to the second side 62 and an interface 13 for electrical connection with a corresponding second wire (not shown) provided to the board 50. According to this embodiment, the electrical interface 13 is configured as a threaded connection. The threaded connection is provided in close proximity to the box 60 in order to ensure good access to the electrical connection for maintenance.
The box 60 is also made of plastic, for example glass-fibre reinforced plastic or other electrically insulating material, and is for example constructed as a milling piece or manufactured by injection moulding. On the side walls 63 of the box 60 there are provided guide rails 65 which co-operate with grooves 53 on the inner walls 52 of the hollows 51 of the plate 50 (see fig. 3).
Fig. 6 and 7 show perspective views of detailed views of another exemplary embodiment of a cassette of a switch module according to a modification, respectively. This embodiment is similar to the variants of fig. 4 and 5, so only differences are discussed in the following.
According to this embodiment, the electrical interface 13 is configured as a contact system. Thus, instead of a connection for a threaded connection, the wires 11 each have a plug contact 15 at one end. The plug contact can be plugged into a contact bridge 14, which is shown in detail in fig. 8. The contact bridge 14 is formed by two fixed contacts 17 which are arranged opposite one another at a distance from one another. The fixed contact 17 is held in place by a guide pin 18. The first plug contact 15 assigned to the first conductor 11 on the cassette 60 and the second plug contact 16 assigned to the second conductor 12 on the board 50 are plugged between the fixed contacts 17 of the contact bridge 14 in the inserted state of the cassette 60. The fixed contacts 17 are pressed onto the plug contacts 15 and 16 via a spring 19 arranged between a stop 80 of the guide pin 18 and a respective one of the fixed contacts 17, so that the fixed contacts 17 are electrically bridged and connected to each other.
Fig. 9 shows a perspective view of an exemplary embodiment of an on-load tap changer with a switching module according to a modification.
In fig. 9, the on-load tap changer 20 is configured in three phases and has a total of three switching modules 10, each of which comprises a plate 50 and a cassette 60, each of which is configured in accordance with the embodiments shown in fig. 2 to 8. The plates 50 are arranged in a longitudinal direction L of the on-load tap-changer 20 along the drive shaft 22 in a superimposed and spaced apart relationship and are held in this position by means of the support frame 23. The drive shaft 22 also extends in the longitudinal direction L of the on-load tap-changer 20 and drives all three phases of the on-load tap-changer 20 in the same way by means of the motor drive 24.
Assume that: the present disclosure and many of its attendant advantages will be understood by the foregoing description. Furthermore, it is evident that: various modifications may be made in the shape, construction and arrangement of the components without departing from the disclosed subject matter or without sacrificing all of its material advantages. The described embodiments are merely illustrative and such modifications are included in the following claims. Furthermore, it is self-evident that: the invention is defined by the following claims.
List of reference numerals
1. Adjustable transformer
2. Main winding
3. Regulating winding
10. Switch module
11. First wire
12. Second conducting wire
13. Electrical interface
14. Contact bridge
15. First plug contact
16. Second plug contact
17. Fixed contact
18. Guide pin
19. Spring
20. On-load tap-changer
21. Load lead
22. Driving shaft
23. Supporting frame
24. Motor driving device
25. Driving unit
30. Selector unit
31 30 fixed contact
40. Load transfer switch unit
41. Vacuum switch tube
42. Mechanical switching element
50. Board board
51. Blank part
52 51 inner wall of
53. Device for guiding
60. Box (B)
61 60 on a first side
62 60 on a second side
63 60 side wall
64. Handle
65. Guide rail
80. Stop piece
N 1 、……、N J 、……、N N 3 winding tap
The longitudinal direction of the L-load tap changer.
Claims (8)
1. Switching module (10) for an on-load tap changer (20) for tapping (N) a winding of a step transformer (1) 1 、……、N J 、……、N N ) And a switching module for switching between the switching modules, the switching module comprising:
a selector unit (30) for powerless pre-selection of the selected winding tap (N J ) Applying;
a load transfer switch unit (40) for tapping a load from a previous winding (N J1 ) Actually switching to the preselected winding tap (N J ) Applying;
-a plate (50) on which the selector unit (30) and the load transfer switch unit (40) are arranged;
wherein,,
the load transfer switch unit (40) is provided on a separate box (60) which is releasably connected to the plate (50).
2. The switch module (10) according to the preceding claim, wherein,
the load transfer switching unit (40) comprises at least one vacuum switching tube (41) and/or at least one power electronic switching element and/or at least one mechanical switching element (42), in particular a bridge switch.
3. The switch module (10) according to claim 1 or 2, wherein,
the cartridge (60) has a first side (61) and a second side (62) opposite the first side (61);
the at least one vacuum switching tube (41) and/or the at least one electronic switching element are arranged on the first side (61) and the at least one mechanical switching element (42) is arranged on the second side (62).
4. The switch module (10) according to any of the preceding claims, wherein,
the plate (50) has a recess (51) with an open side, which comprises means (53) for guiding on at least two inner walls (52), via which means at least two side walls (63) of the cassette (60) can be inserted into the recess (51) such that the cassette (60) is fixed in the inserted state and is flush with the plate (50).
5. The switch module (10) according to any of the preceding claims, wherein,
the switch module (10) has at least one electrical interface (13) via which a first line (11) assigned to the box (60) and a second line (12) assigned to the board (50) can be connected to each other.
6. The switch module of claim 5 wherein,
the electrical connection (13) is designed as a threaded connection.
7. The switch module of claim 5 wherein,
the electrical interface (13) is designed as a contact system comprising a contact bridge (14), a first plug contact (15) associated with the cartridge (60) and a second plug contact (16) associated with the plate (50), the first plug contact (16) being releasably connected to the contact bridge (14).
8. For winding tap (N) of adjustable transformer (1) 1 、……、N J 、……、N N ) An on-load tap changer (20) with uninterrupted switching between, said on-load tap changer comprising at least oneThe switching module (10) according to any one of claims 1 to 7.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021100145.5A DE102021100145B3 (en) | 2021-01-07 | 2021-01-07 | SWITCHING MODULE AND ON-LOAD TAP SWITCH WITH SWITCHING MODULE |
| DE102021100145.5 | 2021-01-07 | ||
| PCT/EP2021/084479 WO2022148583A1 (en) | 2021-01-07 | 2021-12-07 | Switching module, and on-load tap changer comprising a switching module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116783676A true CN116783676A (en) | 2023-09-19 |
Family
ID=79024878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180087756.2A Pending CN116783676A (en) | 2021-01-07 | 2021-12-07 | Switch module and on-load tap changer with a switch module |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4264650A1 (en) |
| CN (1) | CN116783676A (en) |
| DE (1) | DE102021100145B3 (en) |
| WO (1) | WO2022148583A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9728327B2 (en) * | 2012-11-13 | 2017-08-08 | Shanghai Huaming Power Equipment Co., Ltd | External on-load tap changer |
| DE102014102263B3 (en) * | 2014-02-21 | 2015-04-23 | Maschinenfabrik Reinhausen Gmbh | On-load tap-changer with a housing and a replaceable switching module |
| JP6282547B2 (en) * | 2014-07-15 | 2018-02-21 | 株式会社東芝 | Load tap changer |
| CN109411255B (en) | 2018-12-12 | 2024-08-02 | 浙江腾龙电器有限公司 | Single-resistor single-vacuum on-load capacity-regulating voltage-regulating tap switch |
| CN111463038A (en) | 2019-01-22 | 2020-07-28 | 济南爱迪电气设备有限公司 | Special on-load voltage regulating switch for distribution transformer and on-load voltage regulating distribution transformer |
| CN110098081A (en) | 2019-05-28 | 2019-08-06 | 浙江腾龙电器有限公司 | A kind of on-load voltage regulating switch |
-
2021
- 2021-01-07 DE DE102021100145.5A patent/DE102021100145B3/en active Active
- 2021-12-07 WO PCT/EP2021/084479 patent/WO2022148583A1/en active Application Filing
- 2021-12-07 CN CN202180087756.2A patent/CN116783676A/en active Pending
- 2021-12-07 EP EP21830987.0A patent/EP4264650A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP4264650A1 (en) | 2023-10-25 |
| DE102021100145B3 (en) | 2022-04-07 |
| WO2022148583A1 (en) | 2022-07-14 |
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