EP3513419B1 - Laststufenschalter, regeltransformator mit laststufenschalter und verfahren zum schalten eines laststufenschalters - Google Patents

Laststufenschalter, regeltransformator mit laststufenschalter und verfahren zum schalten eines laststufenschalters Download PDF

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Publication number
EP3513419B1
EP3513419B1 EP17767774.7A EP17767774A EP3513419B1 EP 3513419 B1 EP3513419 B1 EP 3513419B1 EP 17767774 A EP17767774 A EP 17767774A EP 3513419 B1 EP3513419 B1 EP 3513419B1
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EP
European Patent Office
Prior art keywords
selector
change
over
contact
setting
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.)
Active
Application number
EP17767774.7A
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German (de)
English (en)
French (fr)
Other versions
EP3513419A1 (de
EP3513419C0 (de
Inventor
Andreas Stocker
Marco Hörl
Christian Hammer
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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Publication of EP3513419A1 publication Critical patent/EP3513419A1/de
Application granted granted Critical
Publication of EP3513419B1 publication Critical patent/EP3513419B1/de
Publication of EP3513419C0 publication Critical patent/EP3513419C0/de
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Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
    • 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
    • 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
    • H01H9/0005—Tap change devices
    • H01H9/0027—Operating mechanisms
    • H01H9/0033—Operating mechanisms with means for indicating the selected tap or limiting the number of selectable taps

Definitions

  • the invention relates to an on-load tap-changer for a regulating transformer, a regulating transformer with such an on-load tap-changer and a method for switching such an on-load tap-changer.
  • an on-load tap-changer comprises a fine selector with N tap contacts, each of which is to be connected to an associated tap of a control winding of a control transformer, and no preselector.
  • This on-load tap-changer which is also referred to as a linear on-load tap-changer, therefore has a position control range of N positions and a control transformer with this on-load tap-changer has a voltage control range of N voltages.
  • a preselector in addition to its fine selector, which is also referred to as a tap selector.
  • a reversing switch makes it possible to connect the control winding of the control transformer either in the same direction or in the opposite direction to the unregulated winding of the control transformer, which is also referred to as the main winding.
  • a coarse selector or multiple coarse selector it is possible to switch a part of the main winding, which is also referred to as the coarse stage, or several coarse stages, on or off, i.e. to optionally connect or not connect at least one coarse stage to the control winding.
  • the linear on-load tap-changer comprises a reversing switch in addition to its fine selector with N tap contacts
  • the fine selector typically comprises a commutation contact to be connected to the main winding in addition to its tap contacts.
  • this on-load tap-changer typically has a position control range of 2xN+1 positions, namely a lower position control range of N positions in which the reversing switch is set such that it connects the control winding in opposite directions to the main winding, an upper position control range of N positions in which the reversing switch is set such that it connects the control winding in the same direction to the main winding, and a middle position which corresponds to the commutation contact and in which the fine selector bridges the control winding.
  • a A regulating transformer with this on-load tap changer typically has a voltage regulation range of 2xN+1 voltages.
  • the linear on-load tap-changer comprises a coarse selector in addition to its fine selector with N tap contacts
  • the fine selector typically comprises, in addition to its tap contacts, a commutation contact to be connected to the main winding.
  • this on-load tap-changer typically has a position control range of 2xN+1 positions, namely a lower position control range of N positions in which the coarse selector is set such that it does not connect the coarse step to the control winding, an upper position control range of N positions in which the coarse selector is set such that it connects the coarse step to the control winding, and a middle position which corresponds to the commutation contact and in which the fine selector bridges the control winding.
  • a control transformer with this on-load tap-changer then typically has a voltage control range of 2xN+1 voltages.
  • DE 1 178 511 A describes a tap changer for regulating transformers with a load changeover switch, reversing switch and two alternately de-energizing tap selectors.
  • Each tap selector comprises several fixed contacts that are connected to the regulated winding.
  • the left tap selector additionally comprises a fixed contact that is not connected to anything, and in particular neither to the regulated nor to the unregulated winding, and is referred to as the idle tap.
  • This known tap changer also comprises a changeover switch that establishes a temporary connection between the unregulated winding and the output of the load changeover switch.
  • the tap selectors are coupled to the reversing switch and the changeover switch via intermittent gears in such a way that the connection is established within the time interval in which the tap selector runs to the idle tap and the reversing switch switches from one end position to the other, and vice versa.
  • the reversing switch comprises a reversing switch arm which is connected to a contact 9 on the unregulated winding.
  • the changeover switch comprises a changeover switch arm which is connected to contact 9. The initial position of the contacts shows FIG. 2 . In this position, the reversing switch arm connects the fixed contact 7 at the lower end of the regulated winding with contact 9 on the unregulated winding.
  • the tap selector arms run from the fixed contact 1 to the fixed contact 7 or from the fixed contact 2 to the fixed contact 6, whereby the load switching is carried out via the load changeover switch.
  • the position of the FIG. 3 reached. In this position, the left tap selector arm contacts contact 6 and the right tap selector arm contacts contact 7, the reversing switch arm contacts contact 7, and the changeover switch arm contacts a left empty contact 0.
  • the load changeover switch establishes the connection to the right tap selector arm and contact 7.
  • the changeover switch arm goes from the left empty contact 0 to a middle contact A, which is connected to the output of the load changeover switch. Then the reversing switch arm goes from contact 7 to an empty contact 0.
  • the left tap selector arm runs from contact 6 to an empty step 8 of the tap selector.
  • the position of the FIG. 4 The right tap selector arm then moves from contact 7 to contact 1 after the load changeover switch has previously switched to the left tap selector arm and the idle stage 8.
  • the position of the FIG. 5 reached.
  • the reversing switch arm moves from empty contact 0 to contact 1 and the changeover switch arm from middle contact A to a right empty contact 0.
  • the left tap selector arm moves from contact 8 to contact 2 after the load changeover switch has previously switched back to the right selector arm and contact 1.
  • the reversing switch arm connects contact 1 at the upper end of the regulated winding with contact 9 on the unregulated winding.
  • the tap selectors then move from contact 1 to contact 7 or from contact 2 to contact 6 with continued switching.
  • the lowest position of the oppositely connected regulated winding is reached, whereby the smallest voltage is removed. The voltage is increased in the reverse order.
  • DE 197 43 864 C1 describes a step switch based on the reactor switching principle for uninterrupted load switching using vacuum switching cells.
  • fixed selector contacts are provided for each phase, which can be switched by moving selector contacts.
  • fixed preselector contacts are provided for each phase, which can be switched by a moving preselector contact.
  • fixed bypass contacts are provided for each phase, which can be switched by a moving bypass contact.
  • a vacuum switching cell is provided for each phase, which can be operated by means of an energy storage device.
  • a drive mechanism is provided for operating all moving contacts and all vacuum switching cells in the corresponding Switching sequence is provided.
  • the drive mechanism has a single Geneva wheel which can be driven by a Geneva driver connected to a drive shaft and is connected to the first insulating shaft in such a way that with each switching the first insulating shaft can be rotated through an angle which corresponds to a switching step.
  • the drive mechanism has first actuating means which act on the second insulating shaft and second actuating means which act on the third insulating shaft.
  • the first actuating means consist of a roller on the Geneva wheel and a corresponding lever. When the Geneva wheel is in a certain position, the roller engages in a cutout in the lever, and the second insulating shaft can thus be pivoted through a certain angle of rotation.
  • the second insulating shaft actuating the movable preselector contact is thus coupled to the drive shaft via the first actuating means, the Geneva wheel and the Geneva driver. Consequently, the first insulating shaft actuating the movable selector contacts and the second insulating shaft actuating the movable preselector contact are jointly coupled to the drive shaft via the Geneva wheel and the Geneva driver.
  • DE 960 303 C concerns a tap selector for transformer control systems. This has two selectors, a load switch and a reversing switch.
  • the transformer has an excitation winding and a tapped winding.
  • the fixed contacts of the selectors are arranged on insulating rods and in a circle around a shaft.
  • a blind contact is fitted under the fixed contacts of each selector.
  • the selectors each have movable contacts that are moved radially around an axis to switch the fixed contacts.
  • the load switch is arranged above the selector levels and the preselector is arranged below the selector levels.
  • EN 10 2013 110 653 A1 relates to a tap changer for a power transformer having at least one main winding and one control winding, with a preselector and a fine selector, which has at least one fine selector contact.
  • the fine selector has at least one auxiliary switch that can be operated independently of it and has at least one auxiliary switching element that contacts taps of the control winding at least largely without arcing. This makes it possible to carry out the switching operations of the tap changer largely without gas.
  • DE 29 36 534 A1 describes a contact arrangement in a tap selector for transformers, in which, according to a Figure 1 In the embodiment shown, a main winding, a fine winding provided with taps for selector arms for voltage adjustment and a coarse winding arranged on the same leg of the transformer are provided for each phase.
  • the selector arms are connected via a load changeover switch to the phase conductor of the transformer whose voltage is to be regulated.
  • a changeover switch is connected with its outer contacts to the beginning and end of the coarse winding.
  • the center contact of the changeover switch is connected to the center contact of a reversing switch, which in turn has outer contacts that are connected to the beginning and end of the fine winding.
  • an auxiliary tap is arranged in the path covered by the selector arms, which is electrically connected to the center contact of an auxiliary changeover switch, the outer contacts of which are connected to the beginning and end of the coarse winding.
  • a formulation of the type "A is connected to B” corresponds to a formulation of the type "A is connected to B"
  • a formulation of the type "A is connected to B” includes the meanings "A is directly electrically connected to B” and "A is indirectly, i.e. via C, electrically connected to B”
  • a formulation of the type "A is connected to B” has the meaning "A is directly electrically connected to B”.
  • This switching of the load changeover switch is the one that takes place when the selector should or must be switched.
  • the »normal « Switching of the load changeover switch under load also known as load switching.
  • the selector arms contact different selector fixed contacts and are therefore at different potentials, and the current path leading from the control winding to the discharge line changes without interruption from one selector arm to the other. Since this change should take place without interruption, both selector arms are typically connected to the discharge line for at least a short time, so that a circulating current flows through them, the load changeover switch and the control winding due to the different potentials applied to them.
  • the selector arms are therefore set during these switching operations of the load changeover switch and the preselector such that one of the selector arms contacts the commutation contact and the other selector arm does not contact any of the tap contacts.
  • one of the selector arms can contact the commutation contact and the other selector arm can be in an intermediate position between the commutation contact and one of the tap contacts, but both selector arms can also contact the commutation contact.
  • the selector arms can, for example, change their respective positions during these switching operations as long as the above condition is met, according to which one contacts the commutation contact and the other does not contact any of the tap contacts.
  • the preselector should or must be switched, for example, when the on-load tap-changer receives a switching command from a control device coupled to it to carry out a tap change from the currently set start position to a target position, and when a) the start position belongs to one of the position control ranges, for example to the lower or upper position control range, and the target position belongs to another of the position control ranges, for example to the upper or lower position control range, or when b) the start position is the middle position and the target position belongs to one of the position control ranges, or when c) the target position is the middle position and the start position belongs to one of the position control ranges.
  • This method allows the selector and load changeover switch to be operated simultaneously, at least for a certain period of time. This saves the additional time and control effort required to operate the selector, which significantly simplifies and speeds up the entire switching process of the on-load tap changer required for a tap change. This method also allows the The changeover of the load diverter switch ends before the changeover of the pre-selector begins, and thus the load diverter switch and pre-selector are operated one after the other.
  • the selector moving contact can be designed in any way as required, for example as a contact finger in a housing.
  • step a) can be started before, simultaneously with or after the start of step b).
  • step c) can be ended simultaneously with or after the start of step b) and/or before, simultaneously with or after the end of step b).
  • Step a') can, for example, be started before, simultaneously with or after step b').
  • Step c') can, for example, be ended simultaneously with or after step b') and/or before, simultaneously with or after the end of step b').
  • the changeover contact can be designed in any manner as required, for example like the movable center contact of a rotary switch, in which the movable center contact is rotated, or like the movable center contact of a pull switch, in which the movable center contact is pulled or pressed.
  • the separate coupling enables a simple and robust design as well as a flexible and easy adaptation of the on-load tap-changer and a significantly simplified and accelerated switching process of the on-load tap-changer and thus error-free function.
  • the preselector serves to connect the control winding to the main winding in different ways and can be designed in any way as required, for example as a reversing switch or coarse selector or multiple coarse selector.
  • the first coupling device can be designed in any manner as required and can comprise, for example, the preselector driver, the preselector Geneva wheel and the rocker.
  • Each of the proposed tap changers and each of the proposed control transformers can, for example, be designed and/or serve and/or be suitable for carrying out and/or being able to carry out one of the proposed methods.
  • FIG. 1 a preferred embodiment of an on-load tap changer 11 is shown schematically.
  • the on-load tap changer 11 is constructed according to the resistance principle and has three fine selectors 20, three preselectors 40 and three load changeover switches 60.
  • Each fine selector 20, each preselector 40 and each load changeover switch 60 is assigned to a specific phase of a regulating transformer ( FIG. 9 ).
  • a single-phase variant of the on-load tap changer 11 would therefore only comprise a fine selector 20, a pre-selector 40 and a load changeover switch 60.
  • Each fine selector 20 is mounted on a fine selector base plate 21, each pre-selector 40 on a pre-selector base plate 41, and each load changeover switch 60 on a load changeover switch base plate 61.
  • the individual base plates 21, 41, 61 preferably consist of an insulating material such as plastic or fiber-reinforced plastic (e.g. a mixture of polyamide or polyphthalamide with glass fibers). They are individually pushed onto at least one rod 16 and are held in place by this.
  • the plates 21, 41, 61 can also be attached in other ways, e.g. using spacers, molded-on webs or additional plates.
  • a common drive shaft 17 drives all fine selectors 20, pre-selector 40 and load changeover switch 60. In this embodiment, the drive shaft 17 extends through the plates 21, 41, 61.
  • the drive shaft 17 is preferably driven by a motor 19 via a bevel gear 18, but can also be driven directly, i.e. without an intermediate Gearbox which drives engine 19.
  • FIG. 2 FIG. 3 and FIG. 4 1 shows one of the fine selectors 20, which is designed according to a preferred embodiment.
  • the fine selector base plate 21 has a first side 211 and a second, opposite side 212.
  • FIG. 2 and 3 show the first page 211, on which nine voter contacts 200...208 ( FIG. 3 ) are arranged behind a first selector Geneva wheel 24. Five of these nine selector fixed contacts 200...208 are connected to five lines 22, via which they can be connected to associated taps of a control winding 13 of the control transformer.
  • the selector fixed contacts 200...208 extend from the first side 211 through the fine selector base plate 21 to the second side 212.
  • the selector fixed contacts 200...208 are preferably made of copper and are additionally silver-plated.
  • the first selector Geneva wheel 24 has a first selector arm 26 mounted so as to be radially movable on its rear side facing the fine selector base plate 21 and is mounted on a first bearing axis 25 so as to be rotatable about an axis 23.
  • the bearing axis 25 is designed as a separate part which is mechanically connected to the fine selector base plate 21.
  • the bearing axle 25 can be injection-molded during the manufacture of the fine selector base plate 21 and formed as a unit with it.
  • a first selector driver 27 is arranged next to the first selector Geneva wheel 24 and is driven via the drive shaft 17.
  • the first selector driver 27 has a first selector driver 28 which engages in the first selector Geneva wheel 24 and rotates it.
  • the first selector driver 27 When the fine selector 20 is operated, the first selector driver 27 is rotated by 360°. When interacting with the first selector Geneva wheel 24, during this complete rotation of the first selector driver 27, the first selector Geneva wheel 24 is only rotated incrementally, i.e. by a fraction of a complete rotation.
  • the combination of the first selector driver 27 and the first selector Geneva wheel 24 converts the continuous rotary motion of the first selector driver 27 into a step-by-step or step-by-step rotation of the first selector Geneva wheel 24.
  • the combination of Geneva wheel and driver enables both parts to lock against each other even in the idle state, i.e. before or after the fine selector 20 is operated.
  • FIG. 4 shows the second side 212 of the fine selector base plate 21.
  • a second selector Geneva wheel 34 with a second selector arm 36 (not shown) is mounted on the second side 212.
  • the second selector Geneva wheel 34 is also mounted on a second bearing axis 35 so as to be rotatable about the axis 23.
  • a second selector driver 37 is arranged next to the second selector Geneva wheel 34 and is operated by the same drive shaft 17 as the first selector driver 27.
  • the second selector driver 37 has a second selector driver 38 which engages in the second selector Geneva wheel 34 and thereby rotates it.
  • the second selector Geneva wheel 34 and thus the second selector arm 36 are driven step by step by the drive shaft 17 via the second selector driver 37 in a similar way to the first selector Geneva wheel 24 and the first selector arm 26.
  • the nine selector fixed contacts 200...208 are arranged analogously to the first side 211 behind the second selector Geneva wheel 34.
  • the remaining four selector fixed contacts 200...208 which are not connected to the five lines on the first side 211, are connected to four further lines 22, via which they can be connected to associated taps of the control winding 11.
  • FIG. 5 and FIG. 6 1 shows one of the preselectors 40, which is designed according to a preferred embodiment.
  • the preselector base plate 41 has a first side 411 and a second, opposite side 412.
  • FIG. 5 show the first side 411.
  • a preselector Geneva wheel 44 is attached to this, which is mounted on a first bearing axis 45 so as to be rotatable about a first axis 43.
  • the first bearing axis 45 is designed as a separate part that is mechanically connected to the preselector base plate 41.
  • the first bearing axis 45 can, however, be injection-molded onto the preselector base plate 41 during manufacture and can be formed as a unit with it.
  • a preselector driver 42 is arranged next to the preselector Geneva wheel 44 and is seated on the drive shaft 17 in a rotationally fixed manner.
  • the first preselector driver 42 has a first preselector driver 421 which can engage in the preselector Geneva wheel 44 and thereby rotates it step by step.
  • a rocker 46 is attached to the first side 411, which is mounted on a second bearing axis 48 so as to be pivotable about a second axis 47.
  • the second bearing axis 48 is also designed as a separate part that is mechanically connected to the preselector base plate 41. However, the second bearing axis 48 can be molded onto the preselector base plate 41 during manufacture and can be designed as a unit with it.
  • the rocker 46 has a mouth 461 that interacts with a second preselector driver 441 that protrudes from the back of the preselector Geneva wheel 44 that faces the preselector base plate 41.
  • FIG. 6 shows the second side 412 of the preselector base plate 41.
  • a first, a second and a third preselector fixed contact 401, 402, 403 of the preselector 40 are arranged on this.
  • the first and second preselector fixed contact 401, 402 are led from the first side 411 through the preselector base plate 41. up to the second page 412 and with Lines 49, via which they can be connected to the ends of the control winding 13.
  • the third preselector fixed contact 403 can be connected to a main winding via a line 49, which is led from the first side 411 through the preselector base plate 41 to the second side 412. 12 of the regulating transformer.
  • the preselector fixed contacts 401...403 are preferably made of copper and are additionally silver-plated.
  • the second side 412 comprises a preselector moving contact 404, which is spring-mounted in a contact housing 50.
  • the contact housing 50 is fixedly connected to the bearing axis 48 so that the pivoting movement of the rocker 46 is transmitted to the preselector moving contact 404. In the first position, this contacts the first preselector fixed contact 401, in the second position the second preselector fixed contact 402 and in the intermediate position neither of these two contacts.
  • the preselector driver 42 is rotated by 360° by the drive shaft 17.
  • the first preselector driver 421 engages the preselector Geneva wheel 44 with each complete rotation of the preselector driver 42 and moves it by a fraction of a complete rotation. This fraction corresponds to a switching operation of the fine selector 20 from a selector fixed contact 200...208 to an adjacent selector fixed contact 200...208.
  • the rocker 46 remains untouched because the second preselector driver 441 has not yet reached the position in which it engages in the mouth 461.
  • This preselector 40 can be used either as a reversing switch or as a coarse selector, depending on how it is connected to the control winding 13 and the main winding 12.
  • FIG. 7 and FIG. 8th 1 shows one of the load diverter switches 60, which is designed according to a preferred embodiment.
  • the load diverter switch base plate 61 is preferably made of an insulating material such as plastic or fiber-reinforced plastic (eg a mixture of polyamide or polyphthalamide with glass fibers) and has a first side 611 and a second, opposite side 612.
  • FIG. 7 shows the first side 611.
  • a switch 62 which in this embodiment is a vacuum interrupter is designed, fastened to the load changeover switch base plate 61 by means of holders 63.
  • the vacuum interrupter 62 comprises a fixed contact 621 and a moving contact 622, via which the vacuum interrupter 62 is opened or closed.
  • a cam disk 64 is attached to the drive shaft 17 in a rotationally fixed manner.
  • a rocker arm 65 is rotatably mounted in such a way that when the cam disk 64 is rotated, an end 651 of the rocker arm 65 moves along a contour 641 of the cam disk 64 and thereby actuates the vacuum interrupter 62, ie closes or opens via its moving contact 622.
  • the moving contact 622 is guided in a holder when actuated.
  • FIG. 8th shows the second side 612 of the load switch base plate 61.
  • a resistor 66 is arranged on the second side 612.
  • a first gear 67 which corresponds to the cam disk 64 on the first side 611, is rotatably mounted on the second side 612.
  • the drive shaft 17 In the example shown here, the cam disc 64, the load switch base plate 61 and the first gear 67 pass through and drive the cam disc 64 and the first gear 67.
  • a switching element 68 is provided, which is connected to a combination of a second gear 69, which is connected to the first gear 67 meshes and is driven by a connecting rod 70, is mounted on the second side 612.
  • the switching element 68 By actuating the drive shaft 17, the switching element 68 is actuated via the gears 67, 69 and the connecting rod 70. Here, the rotary motion of the drive shaft 17 is converted into a linear motion of the switching element 68.
  • the switching element 68 is designed as a bridging switch, for example, but can also be designed as a rotary switch, for example.
  • the arrangement of the individual parts, in particular the vacuum interrupter 62, the resistor 66 and the switching element 68, can be distributed over the first and/or the second side 611, 612 of the load diverter switch base plate 61 as required.
  • the vacuum interrupter 62 and the switching element 68 can also be actuated in any manner as required, for example via gears and/or Geneva wheels and/or connecting rods.
  • the on-load tap changer 11 comprises a first coupling device which couples the preselector 40 to the drive shaft 17, a second coupling device which couples the fine selector 20 to the drive shaft 17, and a third coupling device which couples the load diverter switch 60 to the drive shaft 17.
  • the first coupling device comprises the preselector driver 42, the preselector Geneva wheel 44 and the rocker 46.
  • the second coupling device comprises the selector drivers 27, 37 and the selector Geneva wheels 24, 34.
  • the third coupling device comprises the cam disc 64, the rocker arm 65, the gears 67, 69 and the connecting rod 70.
  • FIG. 9 is a circuit diagram for one phase of a first embodiment of a three-phase regulating transformer which controls the on-load tap changer 11 of the FIG. 1 and a main winding 12 and a control winding 13 with several taps.
  • the commutation contact 200 is connected to one end of the main winding 12, and the step contacts 201...208 are each connected to an associated tap of the control winding 13.
  • the preselector 40 is used as a reversing switch and serves to connect the control winding 13 optionally in the same direction or in opposite directions to the main winding 12.
  • the first preselector fixed contact 401 is connected to a first end of the control winding 13
  • the second preselector fixed contact 402 is connected to a second end of the control winding 13
  • the third preselector fixed contact 403 is connected to one end of the main winding 12 and permanently to the commutation contact 200.
  • the load diverter switch 60 comprises, in addition to the switch 62 and the resistor 66, a first connection 601, a second connection 602, and a movable changeover contact 604 which is connected to a discharge line 603 of the on-load tap changer 11 and the regulating transformer.
  • the changeover contact 604 is designed as a bridging switch and contacts the first connection 601 in a first position, the second connection 602 in a second position, and both connections 601, 602 in a bridging position. In the first position, it connects the discharge line 603 to the first connection 601, in the second position, the discharge line 603 to the second connection 602, and in the bridging position, both connections 601, 602 to the discharge line 603.
  • the first connection 601 is connected to the first selector arm 26 via a main branch 14.
  • the second terminal 602 is connected to the second selector arm 36 via an auxiliary branch 15, with the resistor 66 connected in series between them.
  • the switch 62 is connected between the terminals 601 and 602.
  • FIG. 9 and FIG. 9a to h shows a first embodiment of a switching sequence of a step switching of the on-load tap changer 11.
  • the on-load tap changer 11 switches, for example, from the commutation contact 200 to the eighth step contact 208, which can also be referred to as a switching from a position 9 to a position 8. of the on-load tap changer 11.
  • the selector arms 26, 36 contact the commutation contact 200 and the preselector 40 is in the first position.
  • the selector arms 26, 36 contact the eighth tap contact 208 and the preselector 40 is in the second position. Consequently, the preselector 40 must be operated in this tap switching.
  • the starting position for this switching sequence is in FIG. 9 In this initial position, the on-load tap changer 11 is in position 9, the load diverter switch 60 is in the first position and the switch 62 is closed.
  • a step a the preselector moving contact 404 is separated from the second preselector fixed contact 402 and thus brought into the intermediate position.
  • the on-load tap changer 11 is now in the position of FIG. 9a .
  • a step b the load changeover switch 60 is switched.
  • the changeover contact 604 is first set to the bridging position according to FIG. 9b1 and then continue to the second position according to FIG. 9b2
  • the switch 62 is then opened. This completes the first switching of the load changeover switch 60, during which no circulating current has flowed.
  • the preselector moving contact 404 is still in the intermediate position on the way to the first preselector fixed contact 401.
  • the on-load tap changer 11 is now in the position of FIG. 9b3 .
  • step c the preselector moving contact 404 is contacted with the first preselector fixed contact 401 and thus brought into the second position. This completes the switching of the preselector 40.
  • the on-load tap changer 11 is now in the position of FIG.9c .
  • a step d the first selector arm 26 is separated from the commutation contact 200 and contacted with the eighth tap contact 208.
  • the on-load tap changer 11 is now in the position of FIG. 9d .
  • a step e the switch 62 is closed so that the auxiliary branch 15 is connected to the main branch 14 via the switch 62 and a circulating current Ic flows through the on-load tap-changer 11 and the control winding 13.
  • the on-load tap-changer 11 is now in the position of FIG.9e .
  • a step f the changeover contact 604 is first again set to the bridging position according to FIG. 9f1 and then continue to the first position according to FIG. 9f2
  • the switch 62 is then opened again, whereby the auxiliary branch 15 and the main branch 14 are separated and the circuit current Ic ceases.
  • the on-load tap changer 11 is now in the position of FIG. 9f3 .
  • step g the second selector arm 36 is separated from the commutation contact 200 and contacted with the eighth tap contact 208.
  • the on-load tap changer 11 is now in the position of FIG. 9g .
  • a step h the switch 62 is closed. This completes the load switching to the tap contact 201 and also the tap switching from position 9 to position 8.
  • the on-load tap changer 11 is now in the end position of the FIG. 9am .
  • step switching is to be carried out in the opposite direction, i.e. from position 8 to position 9, the procedure shown in FIG. FIG. 9 to FIG. 9h described switching sequence in exactly the reverse order.
  • FIG. 10 shows a timing diagram of the switching sequence of the FIG. 9 to FIG. 9h
  • the rows arranged from top to bottom show the positions of the switch 62, the changeover contact 604, the first selector arm 26, the second selector arm 36 and the preselector moving contact 404 over time for a complete step change from position 8 to position 9 or vice versa.
  • the vertical dashed line marks the time at which the switching of the preselector 40 must be completed at the latest or may be started at the earliest, namely when one of the selector arms 26, 36 contacts the commutation contact 200 and the other selector arm no longer or still not contacted.
  • the timing diagram is to be read from right to left.
  • the timing diagram shows that first, according to step a, the preselector moving contact 404 is moved from the second position to the intermediate position, then according to sub-steps b1 and b2, the changeover contact 604 is moved from the first position to the bridge position and from there to the second position, then according to sub-step b3, the switch 62 is opened, and then according to step c, the preselector moving contact 404 is moved from the intermediate position to the first position.
  • this process takes place in exactly the reverse order.
  • FIG. 11 A timing diagram of a second embodiment of the switching sequence is shown. This embodiment is similar to the first embodiment in FIG. 11 , so that the differences are explained in more detail below.
  • the preselector moving contact 404 is moved to the intermediate position according to step a and then the changeover contact 604 is moved from the first position to the bridge position according to sub-step b1.
  • the preselector moving contact 404 is moved from the intermediate position to the first position according to step c, at the same time the changeover contact 604 is moved from the bridge position to the second position according to sub-step b2 and the switch 62 is then opened according to sub-step b3.
  • the switching of the preselector 40 is completed before the switching of the load changeover switch 60.
  • the switch 62 is actuated before the preselector moving contact 404.
  • FIG. 12 A timing diagram of a third embodiment of the switching sequence is shown. This embodiment is similar to the first embodiment in FIG. 11 , so that the differences are explained in more detail below. In this embodiment, when considering the switching sequence in both directions, the switching of the load changeover switch 60 and the preselector 40 are started and ended simultaneously.
  • FIG. 13 A circuit diagram for one phase of a second embodiment of the regulating transformer is shown. This embodiment is similar to the first embodiment of the FIG. 9 , so that the differences are explained in more detail below.
  • the main winding 12 comprises a tap 121, which forms the upper end of a coarse stage of the main winding 12.
  • the lower end of the main winding 12 forms the lower end of the coarse stage.
  • the preselector 40 is used as a coarse selector and serves to optionally connect the coarse stage to the control winding 13 or not.
  • the first preselector fixed contact 401 is connected to the lower end of the main winding 12 and permanently to the commutation contact 200.
  • the second preselector fixed contact 402 is connected to the tap 121 of the main winding 12.
  • the third preselector fixed contact 403 is connected to one end of the control winding 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Protection Of Transformers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Control Of Electrical Variables (AREA)
  • Keying Circuit Devices (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP17767774.7A 2016-09-16 2017-09-07 Laststufenschalter, regeltransformator mit laststufenschalter und verfahren zum schalten eines laststufenschalters Active EP3513419B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016117526.9A DE102016117526B3 (de) 2016-09-16 2016-09-16 Lasststufenschalter, Regeltransformator mit Laststufenschalter und Verfahren zum Schalten eines Laststufenschalters
PCT/EP2017/072402 WO2018050522A1 (de) 2016-09-16 2017-09-07 Laststufenschalter, regeltransformator mit laststufenschalter und verfahren zum schalten eines laststufenschalters

Publications (3)

Publication Number Publication Date
EP3513419A1 EP3513419A1 (de) 2019-07-24
EP3513419B1 true EP3513419B1 (de) 2024-05-08
EP3513419C0 EP3513419C0 (de) 2024-05-08

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US (1) US11177086B2 (ja)
EP (1) EP3513419B1 (ja)
JP (1) JP7136769B2 (ja)
KR (1) KR102439449B1 (ja)
CN (1) CN108475591B (ja)
AU (1) AU2017326303B2 (ja)
DE (1) DE102016117526B3 (ja)
MX (1) MX2019003024A (ja)
WO (1) WO2018050522A1 (ja)
ZA (1) ZA201901174B (ja)

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DE102018105097A1 (de) 2018-03-06 2019-09-12 Maschinenfabrik Reinhausen Gmbh Laststufenschalter und ortsnetztransformator mit einem laststufenschalter
DE102018130869A1 (de) 2018-12-04 2020-06-04 Maschinenfabrik Reinhausen Gmbh Lastumschalter für Laststufenschalter und Laststufenschalter
EP3758034A1 (en) * 2019-06-25 2020-12-30 ABB Power Grids Switzerland AG Multi-phase selector-preselector apparatus for on-load tap changer
DE102019130462B4 (de) 2019-11-12 2022-03-24 Maschinenfabrik Reinhausen Gmbh Wähler für Laststufenschalter sowie Laststufenschalter damit
DE102019131169B3 (de) * 2019-11-19 2021-02-18 Maschinenfabrik Reinhausen Gmbh Laststufenschalter und Stufentransformator mit Laststufenschalter
DE102020122453A1 (de) * 2020-08-27 2022-03-03 Maschinenfabrik Reinhausen Gmbh Laststufenschaltermodul
DE102020122450A1 (de) * 2020-08-27 2022-03-03 Maschinenfabrik Reinhausen Gmbh Schaltmodul und Laststufenschalter mit Schaltmodul

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Also Published As

Publication number Publication date
EP3513419A1 (de) 2019-07-24
US20190228922A1 (en) 2019-07-25
BR112019004732A2 (pt) 2019-05-28
CN108475591B (zh) 2021-12-14
US11177086B2 (en) 2021-11-16
WO2018050522A1 (de) 2018-03-22
AU2017326303B2 (en) 2022-08-04
JP2019533305A (ja) 2019-11-14
DE102016117526B3 (de) 2018-02-15
JP7136769B2 (ja) 2022-09-13
ZA201901174B (en) 2021-06-30
EP3513419C0 (de) 2024-05-08
MX2019003024A (es) 2019-07-01
AU2017326303A1 (en) 2019-05-02
KR102439449B1 (ko) 2022-09-01
KR20190045368A (ko) 2019-05-02
CN108475591A (zh) 2018-08-31

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