WO2014056694A1 - Changeur de prises en charge équipé d'une bobine de réaction et procédé pour faire fonctionner un changeur de prises en charge - Google Patents

Changeur de prises en charge équipé d'une bobine de réaction et procédé pour faire fonctionner un changeur de prises en charge Download PDF

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Publication number
WO2014056694A1
WO2014056694A1 PCT/EP2013/069440 EP2013069440W WO2014056694A1 WO 2014056694 A1 WO2014056694 A1 WO 2014056694A1 EP 2013069440 W EP2013069440 W EP 2013069440W WO 2014056694 A1 WO2014056694 A1 WO 2014056694A1
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WO
WIPO (PCT)
Prior art keywords
tap
switching element
load
branch
switching
Prior art date
Application number
PCT/EP2013/069440
Other languages
German (de)
English (en)
Inventor
Dieter Dohnal
Original Assignee
Maschinenfabrik Reinhausen Gmbh
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 Maschinenfabrik Reinhausen Gmbh filed Critical Maschinenfabrik Reinhausen Gmbh
Publication of WO2014056694A1 publication Critical patent/WO2014056694A1/fr

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Classifications

    • 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
    • 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
    • H01H9/54—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

Definitions

  • the present invention relates to an on-load tap changer with Ticklerwindung for uninterrupted load switching from a tap tap to the next stage tapping of a tapped transformer.
  • the on-load tap changer has a tickler winding for uninterrupted load switching from a tap tap to a next stage tap of a tap transformer.
  • the on-load tap changer has a main branch and an auxiliary branch, both of which are connected to a load discharge.
  • the main branch has a first selector contact and the auxiliary branch has a second selector contact.
  • the invention relates to a method for operating a tap changer.
  • tap changers two different basic switching principles exist worldwide: On the one hand, the relatively slow switching reactor switch, which is still dominant in the USA today. Switching impedances, for example in the form of
  • Switching resistors are provided which prevent a step short circuit during the changeover. In this principle of switching these transfer resistors are charged only for a very short period of time. A operating according to the reactor switching principle tap changer, also on the
  • N and n + 1 are adjacent taps of the tap winding of the transformer.
  • the tap changer has moving selector contacts and switching impedances, also called over-reactances. Between the two branches a vacuum switching cell is connected, wherein the corresponding connection for the load dissipation is made by a bypass switch.
  • the bypass switch can - depending on the position - each of the two movable
  • the bypass switch Connect the selector contacts both individually and together with the load derivation. He It has two fixed bypass contacts and two movable bypass contacts.
  • the movable bypass contacts are hinged together and connected to the load lead.
  • Each of the two fixed bypass contacts is electrically connected to one of the movable selector contacts on each side thereof facing the vacuum switch cell.
  • the bypass switch bridges the two fixed bypass contacts and connects them together with the load derivation.
  • this connection between the two fixed bypass contacts and thus the movable selector contacts is interrupted; in the switching sequence shown in Fig. 1, the bypass switch connects only to the original
  • FIG. 1 Another known embodiment of an on-load tap changer, which also operates according to the reactor switching principle, is shown in FIG. This shows a this
  • n and n + 1 are here the adjacent taps of the tap winding of the transformer.
  • MTSi and MTS 2 are the movable selector contacts to be operated at the switch, X-, and X 2 are the over-reactances.
  • the load derivative Y is arranged between the reactances X 1 and X 2 .
  • the selector contact MTS 2 can be moved to the tap n + 1 without current, then closes the load path MSV 2 .
  • a stationary position is established and switched to level B.
  • the Studentsltreaktanzen X-, and X 2 limit the circulating current l c to a permissible for the current path of the transformer and the switch value.
  • Switching impedances are always designed so that they can limit the circulating current generated when switching over in the "bridging position"
  • the taps of the step winding allow there a grading in 1, 25% jumps; By switching on the tickler winding, a switchable graduation of 0.625% is achieved.
  • a tap changer with Ticklerwindung known, which is provided for BeClten fixed stage contacts.
  • This tap changer has two selector contacts, wherein one of the selector contacts is connected in series with a Ticklerwindung and a resistance to the load transfer. The second selector contact is connected via a switch with load derivation. Both load branches are connected immediately before the load dissipation via an antiparallel-connected thyristor pair.
  • a disadvantage of the tap changers with Ticklerwindung lies mainly in the switch contacts. If these are designed as simple mechanical switching contacts, the burn-up occurring during the switching is very large. This causes the Tap-changer is very maintenance-intensive.
  • the object of the invention is to provide an on-load tap-changer for uninterrupted load switching, which is simple in construction while still ensuring a high degree of safety and reliability.
  • the object of the invention is to provide a method for operating an on-load tap-changer for uninterrupted load switching, which ensures a high degree of safety and reliability in load switching.
  • Figure 1 is a known from the prior art embodiment of an on-load tap changer according to the reactor switching principle;
  • FIG. 2 e an on-load tap changer according to the invention with a tickler winding
  • Figure 6 shows an inventive on-load tap-changer with two
  • Figure 7 shows an inventive on-load tap-changer with three
  • FIG. 2 illustrates an on-load tap-changer 1 according to the invention. This has a main branch 2 and an auxiliary branch 3.
  • the main branch 2 consists of a
  • the auxiliary branch 3 has a second switching element 6.
  • Selector contact 7 and a second selector contacts 8 are formed in this example as a unit with the on-load tap-changer 1, but can also be designed as separate components.
  • the first selector contact 7 with the main display 3 and the second selector contact 8 with the auxiliary branch 3 is mechanically electrically connected.
  • the second selector contact 8 provides an electrically conductive connection between a tap tap n and the load lead 10 via the auxiliary branch 3 with the second
  • the Ticklerwindung 4 Since the turns of the Ticklerwindung 4 are aligned against the turns of the tap winding 9, not actually switched voltage is delivered to the load dissipation 10. In the exemplary embodiment, the Ticklerwindung 4 exactly half as many
  • this step only half a tap tapping n was switched on instead of one whole.
  • the auxiliary branch 3 or at least the second selector contact 8, which is connected to it in an electrically conductive manner is moved onto the step tap n + 1.
  • the current is passed through the auxiliary branch 3 to the load dissipation, so that a full stage tap is switched on.
  • FIG. 3 shows an embodiment of the invention in which the first and second switching elements 5, 6 are designed as thyristors.
  • the first and second switching elements 5, 6 are designed as thyristors.
  • This can be implemented in a single element, a so-called commutation cell.
  • thyristors By using thyristors, a very fast switching can be realized. This is particularly important, since switching takes place in the exact zero crossing of the sinusoid of the current and thus no circulating current.
  • other fast switching elements such as IGBT ' s are suitable.
  • FIG. 5 shows a further embodiment according to the invention of the on-load tap-changer 1, which has a tickler winding 4.
  • This Ticklerwindung 4 is connected in series with an ohmic resistance 13.
  • the Ticklerwindung 4 with the first selector contact 7 with a tap tap n and the ohmic resistance 13 is electrically connected to a first terminal 14.1 of a bypass switching element 14.
  • This arrangement forms the main branch 2.
  • a changeover switching element 15 By the Umstellschaltelement 15, it is possible to connect the second selector contact 8 via a line 16 to a second terminal 14.2 of the bypass switching element 14.
  • This arrangement forms the auxiliary branch 3.
  • a first terminal 15.1 of the Umstellschaltelements 15 with a connection point 17 which is located between the Ticklerwindung 4 and the switching resistor 13 is connected.
  • This arrangement forms the auxiliary branch 18.
  • the switching switching element 15 allows the connection of the first terminal 15.1 or the second terminal 15.2 to connect either the first selector contact 7 via the tickler winding 4 or the second selector contact 8 directly to the line 16.
  • bypass switching element 14 By bypassing the first and / or the second terminal 14.1 and / or 14.2, the bypass switching element 14 connects the main branch 2, the auxiliary branch 3 or both simultaneously with the load lead 10. For this, however, the changeover switching element 15 must be connected to the second terminal 15.2.
  • the on-load tap-changer 1 has an interrupting switching element 19, which connects the main branch 2, between the over-resistance 13 and bypass switching element 14, and the auxiliary branch 3, between Umstellschaltelement 15 and bypass switching element 14, in the closed state.
  • the switching element 15 In the stationary state, the switching element 15 is connected to its second terminal 15.2.
  • the bypass switching element 14 contacts its second terminal 14.2 and the interruption switching element 9 is opened.
  • the current flow runs via the auxiliary branch 3 to the load discharge 10.
  • the changeover from a step tap n to an adjacent step tap n + 1 takes place in the following switching steps:
  • Interrupt switch element 19 is closed
  • Changeover switching element 15 switch from the second connection 15.2 to the first connection 15.1;
  • Interrupt switch element 19 is closed
  • Bypass switching element 14 switch from the first terminal 14.1 to the second terminal 14.2, wherein when switching short term both terminals 14.1 and
  • Auxiliary branch 3 or at least the second selector contact 8 switch to the stage tapping n + 1.
  • the current is passed through the connected turns between the tap n and n + 1 and the Ticklerwindung 4 to the load discharge 10.
  • the turns of the tickler winding 4 counteract the
  • Windings of the step winding 9 are aligned, thus only half of the
  • Windings which lie between the stage taps n and n + 1, connected to the load discharge 10. In order to be able to switch on the entire stage, the following switching steps are necessary:
  • Interrupt switch element 19 will close
  • Open circuit element 19 is opened.
  • Step taps n and n + 1 is done.
  • FIG. 6 shows a further embodiment according to the invention of the on-load tap-changer 1, which has a tickler winding 4 as a switching-over reactance.
  • This Ticklerwindung 4 is connected in series with a switching resistor 13 and an interrupting switching element 20.
  • the Ticklerwindung 4 is electrically connected to the first selector contact 7 with a tap tap n and the interruption switching element 20 to the load discharge 10.
  • the switching resistor 13 is disposed between the tickler winding 4 and the breaker switching element 20. This arrangement forms the main branch 2.
  • the voltage applied to the tap n, second selector contact 8 is connected to the terminal 15.2 of the Umstellschaltelements 15.
  • Umstellschaltelement 15 it is possible to connect the second selector contact 8 via an interrupt switching element 21 with the load discharge 10. However, this is only possible if the breaker switch 21 is in the closed state.
  • This arrangement forms the auxiliary branch 3.
  • the secondary branch 18 is formed by the conductive connection between the first terminal 15.1 of the Umstellschaltelements 15 with a connection point 17, which is located between the Ticklerwindung 4 and the switching resistor 13.
  • the current In the stationary state, i. before the start of a changeover from a tap tap n to a next tap tap n + 1, the current first flows from the tap winding 9 via the tap tap n via the auxiliary branch 3 to the load discharge line 10.
  • the interrupt switch element 21 is closed and the switchover switch element 15 connects its second connection 15.2.
  • the interruption switching element 20 in the main branch 2 is open.
  • Interrupt switch element 20 is closed
  • Changeover switching element 15 switch from the second connection 15.2 to the first connection 15.1;
  • Interrupt switch element 21 is closed
  • Interrupt switch element 20 is opened;
  • the current is conducted via the connected windings between the step tap n and n + 1 and the tickler winding 4 to the load discharge 10. Since, as already described in FIG. 2, the turns of the tickler winding 4 are oriented counter to the turns of the step winding 9, only half of the windings which are between the two
  • Step taps n and n + 1 are connected to the load lead 10. In order to be able to switch on the entire stage, the following switching steps are necessary:
  • Interrupt switch element 20 is closed
  • Interrupt switch element 21 is opened
  • Interrupt switch element 20 is opened. Also in this embodiment, the connection of all turns between the stage taps n and n + 1 is done after the last switching step.
  • the main branch 2 or at least the first selector contact 7 is first fed to the adjacent tap tap n + 1.
  • the interrupt switch element 20 of the main branch 2 is closed and then the breaker switch element 21 is opened.
  • the current now flows from for the load transfer 10 via the main branch 3 with the Ticklerwindung 4 and the switching resistor 13.
  • the Umstellschaltelement 15 switches to its first terminal 15.1. As soon as this is done first the
  • the second selector contact 8 is connected directly to the load lead 10 via an interrupt switch element 23.
  • This subassembly 18 is composed of the transient resistor 13 and an interruption switching element 24 connected in series with it. In this case, the transient resistance 13 is connected to the connection point 17 and the interruption switching element 24 to the load dissipation 10.
  • the interruption switching element 23 of the auxiliary branch 3 is closed, and the interruption switching elements 22 and 24 of the main branch 2 and the sub-branch 18 are opened.
  • the current flow runs via the auxiliary branch 3 to the load discharge 10.
  • Interrupt switch element 23 is opened
  • the current is passed through the connected turns between the tap n and n + 1 and the Ticklerwindung 4 to the load discharge 10.
  • the turns of the tickler winding 4 counteract the
  • Windings of the step winding 9 are aligned, thus only half of the
  • Windings which lie between the stage taps n and n + 1, connected to the load discharge 10. In order to be able to switch on the entire stage, the following switching steps are necessary:
  • Interrupt switch element 24 is closed
  • Interrupt switch element 22 is opened
  • Interrupt switch element 23 is closed
  • Step taps n and n + 1 is done.
  • the use of a Ticklerwindung 4 is particularly advantageous because it sits on the core of the transformer and thus does not need to be arranged as a separate component. This saves material costs for the turns and the core.
  • a Ticklerwindung 4 requires less space than a separate Kochretreaktanz, especially since this is only half as large. The size of the entire transformer is reduced considerably.
  • Ticklerwindung 4 in conjunction with thyristors as switching elements makes Kochltreaktanzen to limit the resulting switching from a tap tap n to the next step tap n + 1 resulting circular currents superfluous. Due to the fast and exact wiring of the thyristors, the current flow can be performed exactly in the zero crossing of the sinusoid. The use of permanent skin contacts increases the life of the thyristors and reduces their size, since the current is passed over these after completion of the switching process. The use of Ticklerwindung 4 in conjunction with simple mechanical switches in the form of bypass switching elements or Umstellschaltmaschinen and vacuum interrupters in the form of interruption switching elements with a resistive Overload resistor is also advantageous.
  • Vacuum interrupters belong to the switching devices with particularly high overload capacity and electrical life.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

L'invention concerne un changeur de prises en charge (1) équipé d'une bobine de réaction (4) et un procédé pour faire fonctionner un changeur de prises en charge (1) équipé d'une bobine de réaction (4). Le changeur de prises en charge (1) sert à commuter en charge sans interruption d'une prise (n) à une prise (n+1) suivante d'un transformateur à gradins (T). Le changeur de prises en charge (1) comporte une branche principale (2) et une branche auxiliaire (3) reliées l'une et l'autre à une ligne de sortie de charge (10). La branche principale (2) contient un premier contact de sélecteur (7) et la branche auxiliaire (3) contient un deuxième contact de sélecteur (8). La bobine de réaction (4) est disposée dans la branche principale (2) entre le premier contact de sélecteur (7) et la ligne de sortie de charge (10).
PCT/EP2013/069440 2012-10-09 2013-09-19 Changeur de prises en charge équipé d'une bobine de réaction et procédé pour faire fonctionner un changeur de prises en charge WO2014056694A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012109581.7 2012-10-09
DE201210109581 DE102012109581A1 (de) 2012-10-09 2012-10-09 Laststufenschalter mit Ticklerwindung und Verfahren zum Betrieb eines Laststufenschalters

Publications (1)

Publication Number Publication Date
WO2014056694A1 true WO2014056694A1 (fr) 2014-04-17

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PCT/EP2013/069440 WO2014056694A1 (fr) 2012-10-09 2013-09-19 Changeur de prises en charge équipé d'une bobine de réaction et procédé pour faire fonctionner un changeur de prises en charge

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WO (1) WO2014056694A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015106178A1 (de) * 2015-04-22 2016-10-27 Maschinenfabrik Reinhausen Gmbh Laststufenschalter
US20200043650A1 (en) * 2016-10-21 2020-02-06 Kabushiki Kaisha Toshiba On-load tap changing apparatus and on-load tap changing system
DE102017215460A1 (de) * 2017-09-04 2019-03-07 Siemens Aktiengesellschaft Anordnung zum Anschluss an ein Hochspannungsnetz mit einstellbarer Impedanz
CN112908652B (zh) * 2021-01-08 2023-02-10 南京南瑞继保电气有限公司 有载分接开关及其控制方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201938A (en) * 1978-10-02 1980-05-06 Siemens-Allis, Inc. Voltage regulator which eliminates arcing during tap changes
DE19518272C1 (de) 1995-05-18 1996-10-24 Reinhausen Maschf Scheubeck Stufenschalter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19743865C1 (de) 1997-10-04 1999-04-15 Reinhausen Maschf Scheubeck Stufenschalter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201938A (en) * 1978-10-02 1980-05-06 Siemens-Allis, Inc. Voltage regulator which eliminates arcing during tap changes
DE19518272C1 (de) 1995-05-18 1996-10-24 Reinhausen Maschf Scheubeck Stufenschalter

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"ELECTRIC POWER TRANSFORMER ENGINEERING", 1 January 2004 (2004-01-01), XP055099554, Retrieved from the Internet <URL:http://prof.usb.ve/bueno/Libros/Electric%20Power%20Transformer%20Engineering.pdf> [retrieved on 20140130] *
ZEITSCHRIFT, SIEMENS ENERGY & AUTOMATION TECHNOLOGY, March 1986 (1986-03-01), pages 16 - 18

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