EP3258475A1 - Laststufenschalter für lineares schalten - Google Patents

Laststufenschalter für lineares schalten Download PDF

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Publication number
EP3258475A1
EP3258475A1 EP16175104.5A EP16175104A EP3258475A1 EP 3258475 A1 EP3258475 A1 EP 3258475A1 EP 16175104 A EP16175104 A EP 16175104A EP 3258475 A1 EP3258475 A1 EP 3258475A1
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EP
European Patent Office
Prior art keywords
selector
tap
diverter switch
change
selector part
Prior art date
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.)
Granted
Application number
EP16175104.5A
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English (en)
French (fr)
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EP3258475B1 (de
Inventor
Stina Bertilsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Energy Ltd
Original Assignee
ABB Schweiz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP16175104.5A priority Critical patent/EP3258475B1/de
Priority to PCT/EP2017/064399 priority patent/WO2017216153A1/en
Priority to CN201780037457.1A priority patent/CN109313997B/zh
Priority to BR112018075735-7A priority patent/BR112018075735B1/pt
Publication of EP3258475A1 publication Critical patent/EP3258475A1/de
Application granted granted Critical
Publication of EP3258475B1 publication Critical patent/EP3258475B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/02—Details
    • H01H29/04—Contacts; Containers for liquid contacts

Definitions

  • the present invention relates to the field of power regulation, and in particular to on-load tap-changers and voltage regulation of power transformers by means of on-load tap-changers.
  • Tap-changers are used for controlling the output voltage of a transformer by providing the possibility of switching in or switching out additional turns in a transformer winding.
  • a tap-changer comprises a set of stationary contacts which are connectable to a number of taps of a regulating winding of a transformer, where the taps are located at different positions in the regulating winding.
  • a tap-changer further comprises at least one moveable contact which is connected to a current collector at one end, and connectable to one of the stationary contacts at another end.
  • Tap-changers are either on-load, i.e. operating while the transformer is energized, or off-load, i.e. operating while the transformer is not energized.
  • many tap-changers include a diverter device, by which a large transition resistor can be connected between the old and the new tap during the tap changing event.
  • a diverter-type tap-changer the electrical connection between the stationary contacts and an external contact is typically formed by a diverter switch together with a tap selector.
  • a diverter-switch tap-changer comprises a diverter switch as well as a tap selector. The tap selector is used to select the tap to which the load current is to be transferred, while the diverter switch is used to perform the commutation of the load current from the presently connected tap to the tap selected by the tap selector.
  • the transformer has a main winding and a regulating winding connected to the main winding.
  • the regulating winding includes the taps.
  • the regulating windings in the transformer can be connected to the main winding in different ways providing different types of regulation.
  • the windings can be arranged for linear regulation, plus-minus regulation, and coarse regulation.
  • FIG. 1 shows an example of linear regulation of transformer windings.
  • the windings comprise a main winding 1 and a regulating winding 2 connected to the main winding.
  • the regulating winding 2 is provided with a plurality of taps 3 connected to different parts of the regulating winding.
  • Each of the taps 3 is connected to stationary contact of a tap-changer.
  • the tap-changer has a movable contact 4 for connection to the stationary contacts and accordingly to the taps 3.
  • the movable contact 4 is being moved between the stationary contacts to connect different taps 3, and thereby choosing the number of connected turns of the regulating winding.
  • the linear arrangement is generally used on power transformers with moderate regulating ranges up to a maximum of 20%.
  • the tapped turns are added in series with the main winding and changes the transformer ratio.
  • the rated position can be any of the tap positions. Linear connection is normally possible up to 18 positions.
  • An advantage with the linear regulation is low load losses.
  • a disadvantage with the linear regulation is
  • FIG 2a shows an example of a prior art on-load tap-changer 10 adapted for linear regulation having a regulation range of 18 positions.
  • the on-load tap-changer 10 can suitably be connected to a regulating winding 12 having 18 taps.
  • the on-load tap-changer 10 comprises a tap selector 14 and a diverter switch 16 connected to the tap selector 14 and configured to switch between a first connection point x and a second connection point v.
  • the tap selector 14 comprises two current collectors in the form of a first contact ring H17 and a second contact ring V17 arranged at different vertical levels.
  • the first connection point x is connected to the first contact ring V17 and the second connection point v is connected to the second contact ring H17.
  • the tap selector 14 has 18 stationary contacts 19 given no. 1- 18 and two movable contacts denoted V and H.
  • the stationary contacts 19 are arranged at a distance from the contact rings in different radial directions, and the movable contacts V and H are arranged rotatable about the contact rings and adapted to electrically connect the stationary contacts 19 one at a time with the contact rings V17, H17.
  • the movable contact V is movable between the stationary contacts 19 given odd numbers
  • the movable contact H is movable between the stationary contacts 19 given even numbers.
  • the stationary contacts 19 given odd numbers are arranged in a first horizontal plane
  • the stationary contacts 19 given even numbers are arranged in a second horizontal plane arranged at a vertical distance from the first plane.
  • the movable contacts V, H are arranged at different vertical levels.
  • the movable contacts V and H are arranged to make electrical contact with the stationary contacts 19.
  • Each of the stationary contacts 19 are electrically connected to one of the taps 1 - 18 of the regulating winding 12.
  • Figure 2b shows a table including, for each of the 18 positions, information on which one of the movable contacts is used in the position, which one of the stationary contacts is connected to the movable contact in the position, and the position of the diverter switch in the position.
  • the movable contact V is electrically connected to the stationary contact 1
  • the diverter switch 16 is connected to the first connection point x.
  • the movable contact H is electrically connected to the stationary contact 2
  • the diverter switch 16 is connected to the second connection point v.
  • Figure 3 shows an example of plus-minus regulation of transformer windings.
  • a change over-selector 5 is arranged between the main winding 1 and the regulating winding 2 so that the main winding 1 is connected to a plus position or a minus position of the regulating winding depending on the position of the change-over selector.
  • the movable contact 4 is moving between the stationary contacts to connect different taps 3, and thereby choosing the number of connected turns of the regulating winding.
  • the number of connected turns is selected by switching the connection between the plus and the minus positions of the regulating winding and stepping up and down among the taps.
  • the regulating winding is added to or subtracted from the main winding so that the regulating range can be doubled, or the number of taps can be reduced.
  • FIG 4a shows an example of a prior art on-load tap-changer 24 adapted for plus/minus regulation having a regulation range of 23 positions.
  • the on-load tap-changer 24 can suitably be connected to a regulating winding 26 having thirteen taps 27.
  • the on-load tap-changer 24 comprises a tap selector 28 and a diverter switch 16 comprising a first connection point x and a second connection point v for connection to the tap selector 28.
  • the on-load tap-changer 24 further comprises a change-over selector 5 connected between the regulating winding 26 and the tap selector 28.
  • the tap selector 28 has 12 stationary contacts 30 given numbers 1 - 12 and two movable contacts V and H.
  • the stationary contacts given odd numbers are arranged on a first horizontal plane, and the stationary contacts given even numbers are arranged on a second horizontal plane at a distance from the first plane.
  • the movable contact V is movable between the stationary contacts 30 given odd numbers, i.e. no. 1, 3, 5, 7, 9, 11 and the movable contacts H is movable between the stationary contacts 30 given even numbers, i.e. no. 2, 4, 6, 8, 10, 12.
  • the stationary contact 12 is electrically connected to a tap 32 of the main winding
  • the change-over selector 5 is configured to switch between a first position (20-21) where the tap 32 of the main winding is connected to an upper part of the regulating winding, i.e. tap no. 21 of the regulating winding, and a second position (20-22) where the tap 32 of the main winding is connected to a lower part of the regulating winding, i.e. tap no. 21 of the regulating winding.
  • Figure 4b shows a table including, for each of the 23 positions, information on the state of the change-over switch 5, which one of the movable contacts is used in the position, which one of the stationary contacts is connected to the movable contact in the position, and the position of the diverter switch in the position.
  • the state of the change-over switch 5 is 20 - 21
  • the movable contact V is electrically connected to the stationary contact no. 1
  • the diverter switch 16 is connected to the first connection point x.
  • the change-over switch 5 switches to another state, i.e. between 20 - 21 and 20-22
  • the movable contact H is electrically connected to the stationary contact no. 12, which is connected to the tap 32 of the main winding
  • the diverter switch 16 is connected to the second connection point v.
  • HVDC transformers often have a large regulation range, normally from 25 to 35 positions. The load losses are evaluated in a position near the minus position.
  • Today most HVDC transformers are provided with plus/minus regulation that has higher load losses near the minus positions compared to linear or coarse regulations. The regulation is often placed close to the core. Linear connection is not possible due to the limited regulation range. Coarse regulation is often not possible for dielectric reasons or is too expensive since the regulation needs two windings.
  • a successive switching sequence of the stacked stationary contacts is accomplished by dividing the standard operating angle of the Geneva gear in half and using two electrically and mechanically coupled tap selector moving contacts staggered by this angle. Compared to a plus/minus connection, this solution grants lower load losses. However, this is a complex solution with two tap selectors connected with a mechanical shaft.
  • a disadvantage of this solution compared to other linear solutions is that the distance between electrically adjacent contacts is relatively small due to the fact that a blind position is added in between the fixed contacts. A small distance between contacts leads to reduced withstand of voltage.
  • this object is achieved by an on-load tap-changer as defined in claim 1.
  • the on-load tap-changer is adapted for linear switching and comprises:
  • the on-load tap-changer comprises one tap selector with at least two tap selector parts and the change-over selectors are arranged to select which one of the tap selector parts is connected to the diverter switch.
  • the change-over selectors are arranged to select which one of the tap selector parts is connected to the diverter switch.
  • the two change-over selectors connect the cables from the diverter switch to the first selector part in the selector unit.
  • the tap-changer uses the first selector part to connect the regulating winding of the transformer to the diverter switch during the first half of the regulation range.
  • the change-over selectors switch to connect the diverter switch to the second selector part of the selector unit.
  • the two change-over selectors connects the cables from the diverter switch to the second selector part in the selector unit.
  • the tap-changer uses the second selector part to connect the regulating winding to the diverter switch during the last half of the regulation range.
  • the benefit using linear connection compared to plus/minus connection is lower losses in the minus positions. This can also decrease the need of cooling equipment.
  • the invention is particularly useful for medium size High-Voltage Direct Current (HVDC) transformers, and will decrease the losses in the transformer in nominal position with more than 10% compared to the plus-minus connection.
  • HVDC High-Voltage Direct Current
  • a further benefit is that a one-phase linear tap selector can be achieved by connecting a traditional plus/minus three-phase tap selector in a new way.
  • the change-over selectors are connected between the regulating winding and the tap selector.
  • the change-over selectors are connected between the diverter switch and the tap selector parts. It is easy to rebuild a plus/minus three-phase tap-changer to a linear tap-changer according to the invention. Since a tap-changer with change-over selectors and diverter switch are standard components it is not so much work needed to implement the invention.
  • a change-over selector is a switch configured to switch between a first and a second position.
  • the change-over selectors are configured to move between a first and a second position, and the first selector part is connected to the diverter switch when the change-over selectors are in the first position and the second selector part is connected to the diverter switch when the change-over selectors are in the second position. It can be advantageous to move the change-over selectors synchronously to achieve a more reliable solution.
  • the diverter switch is configured to switch between a first connection point x and a second connection point v, and a first of the change-over selectors is connected to the first connection point x and a second of the change-over selectors is connected to the second connection point v.
  • each of the change-over selectors is configured to switch between connecting the diverter switch to the movable contacts of the first selector part and connecting the diverter switch to the movable contacts of the second selector part.
  • Each of the change-over selectors is connected to one of the movable contacts of the first selector part and to one of the movable contacts of the second selector part.
  • one of the change-over selector is configured to switch between connecting the first connection point of the diverter switch to one of the movable contacts of the first selector part and connecting the first connection point of the diverter switch to one of the movable contacts of the second selector part
  • the other of the change-over selector is configured to switch between connecting the second connection point of the diverter switch to one of the movable contacts of the first selector part and connecting the second connection point of the diverter switch to one of the movable contacts of the second selector part.
  • each of the change-over selectors are two-way switches having three connection points, and a first of the connection points is electrically connected to the diverter switch, a second of the connection points is electrically connected to one of the movable contacts of the first selector part, and a third of the connection points is electrically connected to one of the movable contacts of the second selector part, and the change-over selectors are arranged to switch between electrically connecting the diverter switch to the movable contacts of the first selector part, and electrically connecting the diverter switch to the movable contacts of the second selector part.
  • a two-way switch is meant a device is configured to upon command switch between electrically connecting a first connection point to a second connection point, and connecting the first connection point to a third connection point.
  • the on-load tap-changer comprises a third selector part having one stationary contact for connection to the regulating winding, wherein the third selector part is connected to the diverter switch and is by-passing the change-over selectors during switching between the first and second selector parts.
  • This embodiment makes it possible to switch between the first and second selector parts without breaking the current.
  • the diverter switch is connected to the third selector part while the change-over selectors is switching to the second selector part.
  • the diverter switch is connected to the third selector part while the change-over selectors is switching back to the first selector part.
  • each of the first and second selector parts has at least 9 stationary contacts. This embodiment enables linear regulation up to 19 positions.
  • each of the first and second selector parts has at least 13 stationary contacts. This embodiment enables linear regulation up to 27 positions.
  • each of the first and second selector parts has at least 17 stationary contacts. This embodiment enables linear regulation up to 35 positions.
  • this object is achieved by a method for switching the on-load tap-changer as defined in claim 10.
  • the method comprises:
  • the diverter switch is connected to a stationary contact of a third tap selector part while the change-over selectors are switching between the first and second selector parts.
  • the on-load tap-changer according to the invention can be used for linear voltage regulation of a power transformer.
  • this object is achieved by system for voltage regulation of a transformer as defined in claim 13.
  • the system comprises a transformer having a main winding and a regulating winding provided with a plurality of taps and connected to the main winding in series, and a tap-changer according to the invention connected to the taps of the regulating winding.
  • a contact of the diverter switch is connected to the main winding.
  • the benefits of this embodiment is that the regulating winding will be electrically closer to the main winding, and it is possible to place them physically closer to each other. Thus, the duct between regulating winding and main winding can be reduced.
  • the main winding is connected to one end of the regulating winding.
  • FIG. 5a shows a one phase on-load tap-changer 33 adapted for linear regulation according to an embodiment of the invention.
  • the on-load tap-changer 33 comprises a tap selector 34.
  • the tap selector 34 is used to select to which tap of a transformer winding the load current is to be transferred.
  • the tap selector 34 includes a first selector part 36, having a plurality of first stationary contacts 38 for connection to a regulating winding 40 and two movable contacts VA and HA adapted to connect to the stationary contacts 38.
  • the tap selector 34 also includes a second selector part 42 having a plurality of second stationary contacts 44 for connection to the regulating winding 40 and a first and a second movable contact VB, HB adapted to connect to the stationary contacts 44.
  • each of the first and second selector parts 36, 42 has 11 stationary contacts for connection to the regulating winding 40 of the transformer.
  • the regulating winding 40 of the transformer has a set of taps, and each of the fixed contact 38, 44 is connectable to one of the taps of the regulating winding 40.
  • the regulating winding 40 has 23 taps.
  • the regulating winding 40 is shown in figure 5a for illustrative purposes, and is normally not seen as a part of the tap-changer.
  • the on-load tap-changer 33 also comprises a diverter switch 16.
  • the diverter switch 16 is designed to be part of the electrical connection between the transformer and a connecting contact 54 of the tap-changer.
  • the diverter switch 16 is connected to the tap selector 34 for providing tap changing.
  • the diverter switch can be sequentially operated to perform a switching operation between two taps of the regulating winding 40.
  • the diverter switch 16 is used to perform the commutation of the load current from the presently connected tap to a tap selected by the tap selector 34.
  • the diverter switch 16 is connected between the connecting contact 54 and the tap selector 34.
  • the diverter switch 16 comprises a first connection point x for electrical connection to a current collector of the tap selector, a second connection point v for electrical connection to another current collector of the tap selector, and a third connection point for electrical connection to the connecting contact 54 of the tap-changer.
  • the on-load tap-changer 33 comprises a first change-over selector 46 and a second change-over selector 48 connected between the diverter switch 16 and the first and the second selector parts 36, 42.
  • the change-over selectors 46, 48 are arranged to select between connecting the diverter switch 16 to the first selector part 36 and connecting the diverter switch 16 to the second selector part 42.
  • the change-over selectors 46, 48 are switched synchronously.
  • the change-over selectors can also be moved independently.
  • Each of the change-over selectors 46, 48 can be two-way switches having three connection points 50A, 50B, 50C and 52A, 52B, 52C.
  • change-over selectors are configured to switch between electrically connecting a first connection point to a second connection point and connecting the first connection point to a third connection point.
  • first connection points 50A, 52A are electrically connected to the diverter switch 16
  • second connection points 50B, 52B are electrically connected to one of the movable contacts VA, HA of the first selector part 36
  • third connection points 50C, 52C are electrically connected to one of the movable contacts VB, HB of the second selector part 42.
  • the change-over selectors 46, 48 are arranged to switch between electrically connecting the diverter switch 16 to the movable contacts VA, HA of the first selector part, and electrically connecting the diverter switch to the movable contacts VB, HB of the second selector part.
  • the first connection point 50A of the first change-over selector 46 is stationary connected to the connection point x of the diverter switch 16.
  • the first connection point 52A of the second change-over selector 48 is stationary connected to the connection point v of the diverter switch 16.
  • Each of the change-over selectors 46, 48 comprises a movable arm having one end connected to the first connection point 50A, 52A. The other end of the movable arm is arranged movable between the second connection points 50B, 52B and the third connection points 50C, 52C.
  • the second connection point 50B of the first change-over selector 46 is connected to the first selector part 36, and the third connection point 50C is connected to the second selector part 42.
  • the second connection point 52B of the second change-over selector 48 is connected to the first selector part 36 and the third connection point 52C is connected to the second selector part 42.
  • the change-over selectors 46, 48 are connected to the second connection points 50B, 52B, the change-over selectors are in a first position, and when the change-over selectors are connected to the third connection points 50C, 52C, the change-over selectors are in a second position.
  • the change-over selectors 46, 48 are moving between the first and the second positions, and the first selector part 36 is connected to the diverter switch 16 when the change-over selectors 46, 48 are in the first positions and the second selector part 42 is connected to the diverter switch 16 when the change-over selector 46,48 are in the second position.
  • the change-over selectors are configured to switch between connecting the connection points x and v of the diverter switch to the first selector part 36 and the second selector part 42.
  • the movable contacts VA, HA, VB, HB in the tap selectors 36, 42 are adapted to connect to different stationary taps.
  • the movable contact VA of the first selector part 36 is movable between the stationary contacts 38 given odd numbers, i.e. no. 1,3,5,7,9,11
  • the movable contacts HA of the first selector part is movable between the stationary contacts 38 given even numbers, i.e. no. 2,4,6,8,10.
  • the movable contact VB of the second selector part is movable between the second stationary contacts 44 given odd numbers, i.e. no. 13, 15, 17, 19, 21, 23
  • the movable contact HB of the first selector part is movable between the second stationary contacts 44 given even numbers, i.e. no. 14, 16, 18, 20, 22.
  • Each of the first and second selector part 36, 42 comprises two current collectors V17, H17 and V18, H18.
  • the current collectors are contact rings.
  • Each of the movable contacts VA, VB, HA, HB, HC is connected to one of the current collector V17, H17, V18, H18, H19, such as a contact ring.
  • the first selector part 36 comprises the current collectors V17 and H17
  • the second selector part 42 comprises the current collectors V18 and H18.
  • the current collector V17 is connected to the movable contact VA and the second connection point 50B.
  • the current collector H17 is connected to the movable contact HA and the second connection point 52B.
  • the current collector V18 is connected to the movable contact VB and the third connection point 52C.
  • the current collector H18 is connected to the movable contact HB and the third connection point 50C.
  • different stationary contacts become available for connection.
  • the current collector H19 is connected to the movable contact HC and the first connection point 52A.
  • the tap selector 34 may comprise a third selector part 60, as shown in figure 5a .
  • the third selector part 60 has one stationary contact 62 for connection to the regulating winding 40.
  • the stationary contact 62 represents position no 12.
  • the third selector part 60 comprises a current collector H19 and a movable contact HC connected to the current collector H19.
  • the movable contact HC is configured to connect the stationary contact 62 to the current collector H19.
  • the third selector part 60 is electrically connected to the diverter switch 16.
  • the current collector H19 of third selector part 60 is connected to connecting point v of the diverter switch 16.
  • the third selector part can bypass the change-over selectors during switching between the first and second selector parts.
  • the diverter switch While switching between the first and the second selector parts 36, 42, the diverter switch is electrically connected to the stationary contact 62 in the third selector part 60 and is by-passing the change-over selectors 46, 48.
  • the movable contacts HA, HB In order to switch between the first and the second selector parts 36, 42 the movable contacts HA, HB must be in a blind position where they are not electrically connected to the regulating winding. In this embodiment, such positions of the movable contacts are shown in figure 5a .
  • the contact 62 is electrically connected to the connection point v at the diverter switch.
  • the movable contact HC is in a blind positions. With a blind position is meant a position without any stationary contact. When the movable contact is in a blind position, the movable contact is not connected to any of the stationary contacts.
  • Figure 5b shows a table illustrating how the tap-changer is stepped up and down among the 23 positions.
  • the table includes, for each of the 23 positions, information on the current position of the change-over selector, which one of the movable contacts is used in the position, which one of the stationary contacts is connected to the movable contact in the position, and the position of the diverter switch in the position.
  • the change-over selectors 46,48 are in the first position
  • the movable contact VA is electrically connected to the stationary contact no. 1
  • the diverter switch 16 is connected to the first connection point x.
  • the change-over selectors 46, 48 switch to the other position, i.e.
  • the two change-over selectors are switched to the first position so that the diverter switch is connected to the first selector part, and the movable contacts 38 of the first selector part are repeatedly moved between stationary contacts of the first selector part, i.e. from the first stationary contact no. 1 until the movable contact VA has connected the last stationary contact no. 11 of the first selector part. Then the movable contact HA and the movable contact HB of the second selector part are moved to the blind positions and the movable contact HC is moving to position 12.
  • the diverter switch is electrically connected to the third selector part 60 while the change-over selectors are switching between the first and second selector parts.
  • the two change-over selectors are switched to the second position so that the diverter switch is connected to the second selector part. Then, the movable contacts 44 of the second selector part are repeatedly moved between stationary contacts of the second selector part, i.e. from the first stationary contact no. 13 until the movable contact VB has connected the last stationary contact no. 23 of the second selector part. The same procedure is repeated in reverse order when the tap-changer is stepped down from position 23 to position 1.
  • the first and second selector parts 36, 42 are arranged on top of each other and at different vertical levels.
  • the first selector part 36 is arranged above then second selector part 42, or vice versa.
  • This embodiment provides a compact tap selector and saves space.
  • all three tap selector parts 36, 42, 60 are arranged on top of each other and at different vertical levels in order to save space.
  • the regulation shown in figure 5a can be connected in two different ways.
  • First alternative is to connect main winding to contact 23 of regulating winding 40 and contact 54 of the tap-changer 33 to terminal or other winding.
  • the connection to contact 54 is normally a cable connected to a neutral terminal or another terminal.
  • contact 1 of the regulation winding 40 is connected to a terminal, and the contact 54 of the tap-changer 33 is connected to the main winding.
  • the advantage with this embodiment is that the duct between regulating winding and main winding can be reduced.
  • Figure 6 shows a system for voltage regulation comprising a transformer winding and a tap-changer according to an embodiment of the invention.
  • the transformer has a main winding 1 and a regulating winding 40 provided with a plurality of taps 1- 23 and connected to the main winding 1 in series.
  • the system further comprises the tap-changer 33 having 23 stationary contacts connected to the taps 1 - 23 of the regulating winding.
  • the stationary contacts no. 1 - 11 of the first selector part are connected to the taps 1 - 11 of the regulating winding 40.
  • the stationary contacts no. 13 - 23 of the second selector part are connected to the taps 13 - 23 of the regulating winding, and the stationary contact no. 12 of the third selector part is connected to the tap 12 of the regulating winding 40.
  • contact 23 of the regulating winding is connected to neutral terminal, and the contact 54 of the diverter switch 16 of the tap-changer 33 is connected to a bottom part of the main winding 1.
  • the bottom part of the regulating winding can also be connected to a terminal.
  • Some transformer designs may have problem with unwanted large oscillations in the regulating winding when few or no turns are carrying current. This can be decreased considerably by splitting the winding in two halves. For example, if this is done for the design described in figure 5a .
  • the regulating winding 40 would be divided at contact 12.
  • One additional contact is gained by splitting the winding.
  • the additional contact is located on the part of the winding with the lower number of contacts.
  • a third change-over selector is added.
  • the third change-over selector is moved at the same time as the first and second change-over selectors. At position 1 to 11, the third change-over selector connects the additional contact to contact 12. At position 13 to 23 the third change-over selector connects the additional contact to contact 23.
  • This solution can be done in a second version.
  • the first and second selector parts can have more than 10 stationary contacts.
  • the first and second selector parts may have 17 stationary contacts each. In this case, the number of possible regulation positions will be 35.
  • the invention is not limited to transformer applications, but can also be used in other applications, such as for variable reactors.

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  • Housings And Mounting Of Transformers (AREA)
  • Control Of Electrical Variables (AREA)
EP16175104.5A 2016-06-17 2016-06-17 Laststufenschalter für lineares schalten Active EP3258475B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16175104.5A EP3258475B1 (de) 2016-06-17 2016-06-17 Laststufenschalter für lineares schalten
PCT/EP2017/064399 WO2017216153A1 (en) 2016-06-17 2017-06-13 An on-load tap-changer adapted for linear switching
CN201780037457.1A CN109313997B (zh) 2016-06-17 2017-06-13 适用于线性切换的有载抽头变换器及其切换方法和用途
BR112018075735-7A BR112018075735B1 (pt) 2016-06-17 2017-06-13 Alterador de derivação em carga adaptado para comutação linear, método para comutar o alterador de derivação em carga, uso de um alterador de derivação em carga e sistema para regulação de tensão

Applications Claiming Priority (1)

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EP16175104.5A EP3258475B1 (de) 2016-06-17 2016-06-17 Laststufenschalter für lineares schalten

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EP3761328A1 (de) * 2019-07-01 2021-01-06 ABB Power Grids Switzerland AG Elektromagnetische induktionsvorrichtung mit laststufenschalter

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE1178511B (de) * 1962-08-15 1964-09-24 Bbc Brown Boveri & Cie Stufenschalteinrichtung fuer Regeltransformatoren und Drosselspulen
US3250864A (en) * 1962-07-04 1966-05-10 Reinhausen Maschf Scheubeck Regulating transformers having a large number of taps
EP2584576A1 (de) * 2011-10-20 2013-04-24 ABB Technology Ltd Vorauswahlbetätigungsvorrichtung für einen Vorwähler in einem Stufenwähler

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Publication number Priority date Publication date Assignee Title
DE102014012266B4 (de) * 2014-08-22 2024-10-02 Maschinenfabrik Reinhausen Gmbh Schaltanordnung mit zwei Laststufenschaltern, elektrische Anlage mit einer derartigen Schaltanordnung sowie deren Verwendung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250864A (en) * 1962-07-04 1966-05-10 Reinhausen Maschf Scheubeck Regulating transformers having a large number of taps
DE1178511B (de) * 1962-08-15 1964-09-24 Bbc Brown Boveri & Cie Stufenschalteinrichtung fuer Regeltransformatoren und Drosselspulen
EP2584576A1 (de) * 2011-10-20 2013-04-24 ABB Technology Ltd Vorauswahlbetätigungsvorrichtung für einen Vorwähler in einem Stufenwähler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DR-AXEL KRAMER: "ON-LOAD TAP-CHANGERS FOR POWER TRANSFORMERS", 2014, pages: 198 - 199

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EP3258475B1 (de) 2021-02-17
BR112018075735B1 (pt) 2023-04-25
BR112018075735A2 (pt) 2019-03-26
BR112018075735A8 (pt) 2022-12-27
WO2017216153A1 (en) 2017-12-21
CN109313997B (zh) 2019-12-31
CN109313997A (zh) 2019-02-05

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