WO2022122535A1 - Laststufenschalter - Google Patents
Laststufenschalter Download PDFInfo
- Publication number
- WO2022122535A1 WO2022122535A1 PCT/EP2021/083934 EP2021083934W WO2022122535A1 WO 2022122535 A1 WO2022122535 A1 WO 2022122535A1 EP 2021083934 W EP2021083934 W EP 2021083934W WO 2022122535 A1 WO2022122535 A1 WO 2022122535A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- load tap
- tap changer
- contact
- connection
- module
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims description 28
- 230000007704 transition Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000034 method Methods 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
- H01H9/0027—Operating mechanisms
-
- 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
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
-
- 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
- H01H9/0016—Contact arrangements for tap changers
Definitions
- the invention relates to an on-load tap changer for uninterrupted switching between winding taps of a control winding.
- On-load tap changers are known from the prior art and usually have a diverter switch and a selector.
- the diverter switch with the vacuum interrupters and the transition resistors is arranged in a cylindrical vessel.
- the selector is made up of a large number of sticks arranged in a circle. Contacts are arranged on different levels on these bars, which serve as connections for a control winding. Inside the selector, two selector arms are attached to a switching column. These make contact with the contacts on the rods.
- Diverter switch and selector are connected to each other via a gear.
- the motor drive is located on the outside of the tap-changer and is connected to the on-load tap-changer via a linkage. This structure requires a lot of space, is complex and expensive.
- the object of the invention is therefore to create an on-load tap changer that is simple and compact in design, ensures safe operation and can be used variably and in a variety of ways.
- the invention proposes an on-load tap changer comprising
- Each module can be configured in any way, e.g., as a switching resistor, a reactance, a bridge, or a combination of switching resistor, reactance, or bridge.
- the on-load tap-changer can be used either as an on-load tap-changer based on the resistance quick-switching principle or a Provide on-load tap changer according to the reactor switching principle.
- a module in the main branch which is designed as a switching resistor
- a reactor switch is created. This does not change the basic design of the on-load tap changer itself. Voters, contacts, etc.
- on-load tap-changer type is selected.
- the rigid basic construction remains flexible and can be used in many ways. Even the actuation time of both switch types remains the same and does not need to be adjusted.
- on-load tap changers are actuated quickly according to the resistance quick-switching principle and on-load tap changers slowly according to the reactor switching principle.
- connections on the main branch and auxiliary branch can be designed in different ways. These can be in the form of terminals, plug contacts, stranded wires or any other electrically conductive contact point. These only have to make it possible to equip the main branch and the auxiliary branch with different modules.
- the modules can be designed in any way and can be attached directly to the on-load tap changer itself, for example, or can be arranged in the vicinity of the on-load tap changer.
- a module which is designed as a bridge or transition resistor, is preferably attached directly to the on-load tap changer itself.
- a module designed as a reactance can be arranged in the immediate vicinity, e.g. under or next to the on-load tap changer in the tapped transformer.
- the modules can be designed in any way and have, for example, connections that are designed as clamps, plug contacts, stranded wires or any other electrically conductive contact point.
- the connections of the modules correspond to the connections in the auxiliary branch and in the main branch.
- the on-load tap changer can be designed as a reactor switch if a module designed as a reactance is connected to the first connection and the second connection, and
- the on-load tap changer can be designed as a high-speed resistance switch if a module designed as a bridge is connected to the first connection and a module designed as a switching resistor is connected to the second connection. It is preferably specified that
- the main branch and the auxiliary branch are connected to fixed contacts of different winding taps of a control winding.
- the actuation usually takes place directly via a motor drive or a manual drive.
- a spring energy store can also be arranged between the on-load tap changer and the motor drive or manual drive, which is wound up by the motor drive or the manual drive and the spring energy store then actuates the on-load tap changer.
- the on-load tap changer assumes a stationary position after its actuation, in which the main branch and the auxiliary branch contact the same fixed contacts or different fixed contacts of winding taps;
- the on-load tap changer assumes a stationary position after it has been actuated, in which the main branch and the auxiliary branch contact the same fixed contacts of winding taps.
- the on-load tap changer is actuated in a few seconds, alternatively in one second, preferably in less than 500 milliseconds, particularly preferably in 300 milliseconds, if the on-load tap changer is designed as a high-speed resistance switch.
- the on-load tap changer assumes a stationary position in which a tapped transformer is then operated. This stationary position is assumed before a switchover begins and also after a switchover is completed.
- the first moving contact and the second moving contact are in the stationary position on the same fixed contact.
- the two moving sound clocks are on the adjacent winding tap, i.e. also on the same fixed contact.
- the switching element and the changeover contact are also actuated during the changeover.
- the on-load tap changer is actuated in a few seconds, alternatively in one second, preferably in less than 500 milliseconds, particularly preferably in 300 milliseconds, if the on-load tap changer is designed as a reactor switch.
- a stationary position is possible here, in which the first moving contact is connected to a first fixed contact and the second moving contact is connected to another, adjacent fixed contact. Of the Changeover switch then contacts all changeover contacts. This position is the so-called "bridging position".
- the state or position of the on-load tap-changer in which no individual elements are actuated is referred to as the stationary position.
- the stationary position is also an operating position in which no control takes place and the control transformer or transformer is in control mode. Furthermore, the stationary position is an operating position in which a winding tap of the control transformer is engaged and a continuous current flows through the main branch.
- the on-load tap-changer has at least two moving contacts.
- the moving contacts can be designed in any way as required, for example as contacts that can be moved linearly or rotationally in one or different planes.
- the moving contacts can be designed as selector contacts of a fine selector.
- the on-load tap changer can be designed in any way and have at least one bridging changeover switch.
- the bridging changeover switch can be designed as a rotary switch, in which the movable central contact is rotated, or a pull switch, in which the movable central contact is pulled or pressed.
- the center contact does not make contact with the second changeover contact in the first position and does not make contact with the first changeover contact in the second position.
- the changeover switch comprises a first movable central contact connected to the third changeover contact and a second movable central contact connected to the third changeover contact; in the first position the first and/or second center contact contacts the first changeover contact, in the second position the second and/or first center contact contacts the second changeover contact and in the bridging position the first center contact contacts the first changeover contact and the second center contact contacts the second changeover contact.
- the changeover switch with two middle contacts reaches the bridging position by one of the Center contacts the first changeover contact and the other center contact contacts the second changeover contact. In a first or second position, at least one of the central contacts must make contact with the first or second changeover contact.
- the central contacts do not contact the second changeover contact in the first position and do not contact the first changeover contact in the second position.
- the on-load tap changer can be designed in any way and have at least one switching element.
- the switching element is designed as a vacuum interrupter, oil interrupter or semiconductor switching element, which can be an IGBT or thyristor, for example.
- Each fixed contact has at least two contact surfaces
- the first contact surface is associated with the first moving contact and the second contact surface is associated with the second moving contact.
- the contact surfaces can be designed in any way and, for example, lie in a common plane or in different planes and/or protrude in the same direction or in different directions and/or be designed in one or more parts.
- the third changeover contact is or can be connected to a load dissipation device.
- FIG. 1 shows an on-load tap changer with a first connection and a second connection
- FIG. 2 three different modules for the first and the second connection of the on-load tap changer
- FIG. 3 shows an on-load tap changer according to the resistance quick switching principle
- FIG. 4 shows an on-load tap changer based on the reactor switching principle
- FIG. 5 shows an on-load tap changer with a first and a second connection
- Figure 6 an on-load tap changer.
- FIG. 1 shows a schematic of an electrical system which, for example, forms a control transformer or transformer and which, for example, includes a control winding 12 and an on-load tap changer 1 designed according to a preferred embodiment for uninterrupted switching between winding taps n, n+1 of the control winding 12.
- This on-load tap changer 1 has a changeover switch 2 designed according to a first embodiment with a first, second and third changeover contact 2.1, 2.2, 2.3 and a movable center contact 2.4, which is connected to a load dissipation device 3 of the system.
- This changeover switch 2 is designed as a bridging changeover switch 2 .
- the changeover switch 2 contacts the first changeover contact 2.1 in a first position, the second changeover contact 2.2 in a second position and both changeover contacts 2.1, 2.2 in a bridging position. This connects the first and third changeover contact 2.1, 2.3 in the first position, the second and third changeover contact 2.2, 2.3 in the second position and the first, second and third changeover contact 2.1, 2.2, 2.3 in the bridging position.
- Two of the fixed contacts 4, 5 are connected to an associated winding tap 50, 60.
- the number of fixed contacts depends on the number of winding taps.
- Each fixed contact 4, 5 has at least two contact surfaces 4.1, 4.2, 5.1, 5.2.
- the on-load tap changer 1 has at least two moving contacts 6, 7, each of which can selectively contact at least one of the fixed contacts 4, 5.
- the first contact surface 4.1, 5.1 is always assigned to the first moving contact 6 and the second contact surface 4.2, 5.2 is always assigned to the second moving contact 7.
- a main branch 8 connects the first moving contact 6 to the first changeover contact 2.1.
- An auxiliary branch 9 connects the second moving contact 7 to the second changeover contact 2.2.
- the main branch 8 has a first connection 30 and the auxiliary branch 9 has a second connection 40 .
- the on-load tap changer 1 can be equipped accordingly via the connections 30, 40.
- connection 30 in the main branch 8 is bridged by means of a module 10 designed as a bridge 22 and a transition resistor 20 is connected to the auxiliary branch 9 via the connection 40 .
- a module 10 with a reactance 21 is connected to the terminals 30, 40 in the main branch 8 and in the auxiliary branch 9.
- the first terminal 30 separates the main branch 8 between the first moving contact 6 and before the connection to the switching element 11.
- the second connection 40 separates the auxiliary branch 9 between the second moving contact 7 and before the connection to the switching element 11 .
- the main branch 8 and the auxiliary branch 9 can be connected to one another via the switching element 11 .
- the switching element 11 is preferably designed as a vacuum interrupter, semiconductor switching element or simple oil contact.
- FIG. 2 shows a schematic representation of three modules 10 which can be connected to the first or second connection 30, 40.
- the module 10 can be designed as a switching resistor 20, a reactance 21 or a bridge 22.
- FIG. 3 shows the on-load tap changer 1 in the variant as a high-speed resistance switch.
- a module 10 embodied as a bridge 22 is inserted in the first connection 30 and a module 10 embodied as a transition resistor 20 is inserted in the second connection 40 .
- the stationary position is only given when the two moving contacts 6, 7 and thus the main branch 8 and the auxiliary branch 9 always contact the same fixed contact 4, 5 and thus the same winding tap 50, 60.
- the on-load tap changer 1 is actuated via a drive 13.
- the moving contacts 6, 7 are thereby essentially moved from a first winding tap 50 to a second adjacent winding tap 60 in a fixed Rhine sequence using the switching element 11 and the changeover switch 2.
- Actuation usually takes place within a few seconds or even faster.
- a continuous current flows from the control winding 12 via the fixed contact 4, in particular the first contact surface 4.1, the first moving contact 6, the main branch 8 with the first connection 30, via the changeover switch 2, in particular the first changeover contact 2.1, the first movable central contact 2.4, the third changeover contact 2.3, to the load dissipation 3.
- FIG. 4 shows the on-load tap changer 1 in the variant as a reactor switch.
- a module 10 in the form of a reactance 21 is connected to the first connection 30 and to the second connection.
- this embodiment of the on-load tap changer 1 there is a stationary position when the two moving contacts 6, 7 and thus the main branch 8 and the auxiliary branch 9 make contact with the same fixed contact 4, 5 and thus the same winding tap 50, 60.
- Another stationary position of this embodiment is when the two moving contacts 6, 7 and thus the main branch 8 and the auxiliary branch 9 contact different fixed contacts 4, 5 and thus different winding taps 50, 60.
- the on-load tap changer 13 is also actuated here via the drive 13.
- FIG. 5 shows the connections 30, 40 of the on-load tap changer 1.
- the first connection 30 has a first terminal 31 and a second terminal 32 .
- the second connection 40 has a third 41 and a fourth terminal 42 .
- the modules 10 and thus a switching resistor 20, bridge 22 or reactance 21 can be connected to the terminals 31, 32, 41, 42.
- the modules 10 have respective terminals that correspond to the first, second, third and fourth terminals 31 , 32 , 41 , 42 .
- FIG. 6 shows a three-phase on-load tap changer 1 with three switching modules 23 in a control transformer 70.
- Each switching module 23 includes a plate 24.
- On each plate 24 are a selector with the first and the second moving contact 6, 7, a preselector and a diverter switch with two terminals 30, 40 for the modules 10, the main branch 8, the auxiliary branch 9, the switch 2 and the switching element 11 are arranged.
- the drive 13 is designed as a motor drive and is arranged on the upper side of the on-load tap changer. The drive 13 actuates a drive shaft, by which the individual components of the switching modules 23 are actuated.
Landscapes
- Housings And Mounting Of Transformers (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/254,605 US20240021380A1 (en) | 2020-12-09 | 2021-12-02 | On-load tap-changer |
KR1020237021813A KR20230118119A (ko) | 2020-12-09 | 2021-12-02 | 온-부하 탭 절환기 |
CN202180082266.3A CN116601733A (zh) | 2020-12-09 | 2021-12-02 | 有载分接开关 |
MX2023006837A MX2023006837A (es) | 2020-12-09 | 2021-12-02 | Cambiador de tomas con regulacion de carga. |
EP21824360.8A EP4248475A1 (de) | 2020-12-09 | 2021-12-02 | Laststufenschalter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020132772.2A DE102020132772A1 (de) | 2020-12-09 | 2020-12-09 | Laststufenschalter |
DE102020132772.2 | 2020-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022122535A1 true WO2022122535A1 (de) | 2022-06-16 |
Family
ID=78851302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/083934 WO2022122535A1 (de) | 2020-12-09 | 2021-12-02 | Laststufenschalter |
Country Status (7)
Country | Link |
---|---|
US (1) | US20240021380A1 (de) |
EP (1) | EP4248475A1 (de) |
KR (1) | KR20230118119A (de) |
CN (1) | CN116601733A (de) |
DE (1) | DE102020132772A1 (de) |
MX (1) | MX2023006837A (de) |
WO (1) | WO2022122535A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2374974A (en) * | 1942-10-22 | 1945-05-01 | Gen Electric | Electric circuit |
DE3146970A1 (de) * | 1980-12-01 | 1982-06-09 | Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa | Lastschaltvorrichtung |
DE102012107080B3 (de) * | 2012-08-02 | 2013-10-10 | Maschinenfabrik Reinhausen Gmbh | Stufenschalter |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE659464C (de) | 1934-05-01 | 1938-05-04 | Siemens Schuckertwerke Akt Ges | Verfahren und Vorrichtung fuer das UEberschalten von einer Anzapfstelle zur anderen bei Stufentransformatoren unter Zuhilfenahme von Blindwiderstaenden |
DE1638555U (de) | 1952-03-05 | 1952-05-21 | Hansa Metallwerke Ag | Mischbatterie-anschlussgehaeuse fuer reihen-waschanlagen. |
DD72826A1 (de) | 1969-02-12 | 1970-05-05 | Lastumschalter für Transformatoren und Drosselspulen | |
US4081741A (en) | 1975-10-29 | 1978-03-28 | Asea Aktiebolag | On-load tap changer |
-
2020
- 2020-12-09 DE DE102020132772.2A patent/DE102020132772A1/de active Pending
-
2021
- 2021-12-02 WO PCT/EP2021/083934 patent/WO2022122535A1/de active Application Filing
- 2021-12-02 CN CN202180082266.3A patent/CN116601733A/zh active Pending
- 2021-12-02 KR KR1020237021813A patent/KR20230118119A/ko unknown
- 2021-12-02 MX MX2023006837A patent/MX2023006837A/es unknown
- 2021-12-02 EP EP21824360.8A patent/EP4248475A1/de active Pending
- 2021-12-02 US US18/254,605 patent/US20240021380A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2374974A (en) * | 1942-10-22 | 1945-05-01 | Gen Electric | Electric circuit |
DE3146970A1 (de) * | 1980-12-01 | 1982-06-09 | Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa | Lastschaltvorrichtung |
DE102012107080B3 (de) * | 2012-08-02 | 2013-10-10 | Maschinenfabrik Reinhausen Gmbh | Stufenschalter |
Also Published As
Publication number | Publication date |
---|---|
CN116601733A (zh) | 2023-08-15 |
DE102020132772A1 (de) | 2022-06-09 |
MX2023006837A (es) | 2023-06-22 |
US20240021380A1 (en) | 2024-01-18 |
KR20230118119A (ko) | 2023-08-10 |
EP4248475A1 (de) | 2023-09-27 |
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