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EP2671128A2 - Stepping switch - Google Patents

Stepping switch

Info

Publication number
EP2671128A2
EP2671128A2 EP12701516.2A EP12701516A EP2671128A2 EP 2671128 A2 EP2671128 A2 EP 2671128A2 EP 12701516 A EP12701516 A EP 12701516A EP 2671128 A2 EP2671128 A2 EP 2671128A2
Authority
EP
European Patent Office
Prior art keywords
series
semiconductor switching
branch
winding
switching units
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.)
Withdrawn
Application number
EP12701516.2A
Other languages
German (de)
French (fr)
Inventor
Jochen Von Bloh
Stefan Engel
Dieter Dohnal
Karsten Viereck
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
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, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP2671128A2 publication Critical patent/EP2671128A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
    • G05F1/16—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices combined with discharge tubes or semiconductor devices
    • G05F1/20—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/12—Hand implements, e.g. litter pickers
    • E01H1/1206—Hand implements, e.g. litter pickers for picking up excrements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/257—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
    • H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/12—Hand implements, e.g. litter pickers
    • E01H2001/122—Details
    • E01H2001/1293—Walking cane or the like, i.e. implements allowing handling while in an upright position
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection

Definitions

  • the invention relates to a tap changer for voltage regulation with semiconductor switching elements.
  • Control winding parts which are combined in a certain number of series wound winding groups, each winding group two or three parallel connected
  • Each control winding part is provided with a contactless switching element.
  • the secondary winding of the transformer consists of a group of series-connected control winding parts, wherein each control winding part contains four contactless switching elements.
  • the arrangement is equipped such that the direction of the voltage at the terminals of the control winding part reversible as well as optionally the entire control winding part can be bridged.
  • From DE 25 08 013 A is a further device for the stepwise switching of
  • semiconductor switching elements in fact assume the function of the mechanical selector arm in classical, mechanical tap changers.
  • semiconductor switching elements can individual winding taps of the control windings itself switched on or off. It is also possible to divide the control winding into partial windings, which can be switched on separately.
  • the object of the invention is to provide a tap changer with semiconductor switching elements, which is simple. Furthermore, he should have a modular, expandable structure. Finally, the tap changer according to the invention is intended to enable a high level of control safety and accuracy even when individual switching elements fail, virtually as an emergency operation.
  • the general inventive idea is to build the tap changer modular and selectively connect or disconnect different partial windings of the control winding.
  • the tap changer according to the invention comprises two switch assemblies, wherein the first
  • Switching assembly consists of a parallel connection of two switching branches and in each switching branch are each two series-connected semiconductor switching elements. Between the two switching branches, a first part winding is connected.
  • the second switching module consists of a parallel connection of three switching branches, wherein in each switching branch in turn are each two series-connected semiconductor switching elements. Between the first and second as well as between the second and third switching branch are further electrical part windings, which - are magnetically coupled to the control winding - as well as the first part of the winding, d. H. are applied to the respective transformer legs.
  • the electrical partial windings are dimensioned differently.
  • a local winding has a specific number of windings in a switching module
  • the other two electrical partial windings have winding numbers that are a multiple.
  • the tap changer according to the invention a large number of voltage gradations can be achieved with only a few components for targeted closing or countersharing of the individual partial windings.
  • the tap changer according to the invention is furthermore a redundant generation of individual Partial voltages possible; In the case of failure of individual switching elements, which can never be excluded in practical operation, the regulation can still essentially be continued.
  • Figure 1 shows a first embodiment of a tap changer according to the invention
  • Figure 2 shows a second embodiment
  • FIG. 3 shows a special dimensioning of the tap changer shown in FIG.
  • Figure 4 shows a special dimensioning of the tap changer shown in Fig. 2
  • FIG. 5 shows a first semiconductor switching element
  • FIG. 6 shows a second semiconductor switching element
  • FIG. 7 shows a third semiconductor switching element.
  • FIG. 1 shows a first tap changer according to the invention.
  • the first switch assembly A in turn has a parallel connection of two branches 1 and 2.
  • the first branch 1 two semiconductor switching units S1, S2 are provided in series.
  • two further semiconductor switching units S3, S4 are provided in series with one another.
  • a first partial winding W1 of the control winding is arranged between the two series-connected semiconductor switching units S1, S2 in the first branch 1 and the two series-connected semiconductor switching units S3, S4 in the second branch 2, a first partial winding W1 of the control winding is arranged.
  • the second switch assembly B has a parallel circuit of three branches 3, 4 and 5.
  • In the third branch 3 are connected in series to each other two semiconductor switching units S5, S6, in the fourth branch 4 are connected in series to each other two semiconductor switching units S7, S8 and fifth Branch 5 in series with each other two semiconductor switching units S9, S10 provided.
  • S8 in the fourth branch 4 and the two series-connected semiconductor switching units S9, S10 in the fifth branch 5 a third partial winding W3 is arranged.
  • the second switch assembly B is electrically connected to the load lead LA.
  • Figure 2 shows a second embodiment of a tap changer according to the invention, in which the first switching assembly A is electrically connected to the load lead LA.
  • FIG. 3 shows the tap changer from FIG. 1 with a particularly advantageous dimensioning.
  • the position of the individual components corresponds to the illustration in Figure 1, to the reference numerals has been omitted accordingly for reasons of clarity. It is shown here that the first
  • Partial winding W1 of the switch assembly A seven times the number of turns of the second partial winding W2 of the switch assembly B has; the third partial winding W3 likewise of the switch assembly B has twice the number of turns of the second partial winding W2.
  • the semiconductor switching units S5, S6, S9 and S10 can be in each case connected in series as a series circuit of here 3 separate semiconductor switches and the semiconductor switching units S7 and S8 as a series circuit from here 2 separate
  • Semiconductor switches train. This requires a total of 44 individual semiconductor switches.
  • Figure 4 shows the tap changer of Figure 2 with a likewise particularly advantageous
  • Switching assembly B has six times the number of turns of the first partial winding W1. Through targeted connection and counter-switching of the three partial windings W1... W3, a total of 21 voltage levels can thus also be generated here.
  • the semiconductor switching units S7 and S8 in each case as a series circuit of here 6 separate semiconductor switches and the semiconductor switching units S5, S6, S9, S10 each as a series circuit of 9 separate semiconductor switches here. This is a total of 52 individual
  • Figure 5 shows a single switch, the antiparallel switched thyristor pair, as
  • FIG. 6 shows a series connection of two individual semiconductor switches Sa and Sb, which can yield one of the semiconductor switching elements S1... S10.
  • Figure 7 shows a series connection of four individual semiconductor switches Sa ... Sd, which can also give one of the Halbleiterschaltelemete S1 ... S10.
  • the individual semiconductor switches are shown here by way of example as antiparallel-connected thyristor pairs; In the context of the invention, other known semiconductor switches, IGBTs, for example, are also possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Power Conversion In General (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Electrical Variables (AREA)
  • Keying Circuit Devices (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

The invention relates to a stepping switch for voltage control, comprising semiconductor switch elements on a variable transformer having associated regulating windings. The stepping switch has a modular design, wherein each module comprises a respective sub-winding of the regulating winding which can be activated or deactivated by semiconductor switch elements.

Description

Stufenschalter  step switch
Die Erfindung betrifft einen Stufenschalter zur Spannungsregelung mit Halbleiter-Schaltelementen. The invention relates to a tap changer for voltage regulation with semiconductor switching elements.
Bereits die DE 22 48 166 A beschreibt einen regelbaren Transformator mit Halbleiter- Schaltelementen. Dabei besteht die Sekundärwicklung aus einer bestimmten Anzahl von Already DE 22 48 166 A describes a controllable transformer with semiconductor switching elements. In this case, the secondary winding consists of a certain number of
Regelwicklungsteilen, die in einer gewissen Anzahl von in Serie geschalteten Wicklungsgruppen zusammengefasst sind, wobei jede Wicklungsgruppe zwei oder drei parallel geschaltete Control winding parts, which are combined in a certain number of series wound winding groups, each winding group two or three parallel connected
Regelwicklungsteile enthält. Dabei ist jeder Regelwicklungsteil mit einem kontaktlosen Schaltelement versehen. In dieser Schrift ist auch eine andere Variante beschrieben, wobei die Sekundärwicklung des Transformators aus einer Gruppe von in Serie geschalteten Regelwicklungsteilen besteht, wobei jedes Regelwicklungsteil vier kontaktlose Schaltelemente enthält. Die Anordnung ist derart ausgestattet, dass die Richtung der Spannung an den Klemmen des Regelwicklungsteiles umkehrbar sowie auch wahlweise der gesamte Regelwicklungsteil überbrückbar ist. Contains control winding parts. Each control winding part is provided with a contactless switching element. In this document, another variant is described, wherein the secondary winding of the transformer consists of a group of series-connected control winding parts, wherein each control winding part contains four contactless switching elements. The arrangement is equipped such that the direction of the voltage at the terminals of the control winding part reversible as well as optionally the entire control winding part can be bridged.
Aus der DE 25 08 013 A ist eine weitere Vorrichtung zur stufenweisen Schaltung der From DE 25 08 013 A is a further device for the stepwise switching of
Sekundärspannung eines Transformators bekannt. Auch hierbei ist die Sekundärwicklung in Secondary voltage of a transformer known. Again, the secondary winding is in
Teilwicklungen gruppiert, wobei ebenfalls Halbleiter-Schaltelemente zur Umschaltung vorgesehen werden können. Partial windings grouped, wherein also semiconductor switching elements can be provided for switching.
Die DE 197 47 712 C2 beschreibt eine Anordnung eines Stufenschalters ähnlicher Art an einen als Spartransformator ausgebildeten Stufentransformator. Hierbei sind ebenfalls einzelne Wicklungsteile vorgesehen, die einzeln und voneinander unabhängig beschaltbar sind. Neben festen Anzapfungen der Regelwicklung sind bei dieser Anordnung zusätzlich separate Wicklungsteile an- bzw. zuschaltbar. DE 197 47 712 C2 describes an arrangement of a tap changer of a similar kind to a stepped transformer designed as an autotransformer. Here, individual winding parts are also provided, which are individually and independently connected. In addition to fixed taps of the control winding separate winding parts are also switched on or added in this arrangement.
Aus der WO 95/27931 sind verschiedene Ausführungsformen eines weiteren Stufenschalters zur unterbrechungslosen Lastumschaltung bekannt, wobei ebenfalls Thyristoren als Schaltelemente dienen. Mittels antiparallel geschalteter Thyristorpaare sind dabei unterschiedliche Wicklungsteile einer Stufenwicklung als Teil der Sekundärwicklung des jeweiligen Stufentransformators zu- oder abschaltbar. Zur Realisierung einer möglichst feinstufigen Spannungsregelung bei einer begrenzten Zahl vorhandener Wicklungsanzapfungen wird in dieser Schrift ferner ein als„discrete circle modulation" bezeichnetes Verfahren vorgeschlagen, bei dem die Thyristoren derart angesteuert werden, dass sich Zwischenwerte der Sekundärspannung ergeben. From WO 95/27931 various embodiments of another tap changer for uninterrupted load switching are known, with thyristors also serve as switching elements. By means of antiparallel-connected thyristor pairs, different winding parts of a step winding can be connected or disconnected as part of the secondary winding of the respective step transformer. In order to realize the finest possible voltage regulation with a limited number of existing winding taps, this document also proposes a method called "discrete circle modulation" in which the thyristors are controlled such that intermediate values of the secondary voltage result.
Bei den aus dem Stand der Technik bekannten Lösungen übernehmen Halbleiter-Schaltelemente de facto die Funktion des mechanischen Wählerarmes bei klassischen, mechanischen Stufenschaltern. Mittels der Halbleiter-Schaltelemente können einzelne Wicklungsanzapfungen der Regelwicklungen selbst zu- oder abgeschaltet werden. Es ist auch möglich, die Regelwicklung in Teilwicklungen zu unterteilen, die separat zugeschaltet werden können. In the solutions known from the prior art, semiconductor switching elements in fact assume the function of the mechanical selector arm in classical, mechanical tap changers. By means of the semiconductor switching elements can individual winding taps of the control windings itself switched on or off. It is also possible to divide the control winding into partial windings, which can be switched on separately.
Nachteilig bei diesem Stand der Technik sind der hohe Schaltungsaufwand und die notwendige spezielle Anpassung der Halbleiter-Schaltelemente. A disadvantage of this prior art, the high circuit complexity and the necessary special adaptation of the semiconductor switching elements.
Ein weiterer Nachteil des Standes der Technik besteht darin, dass beim Ausfall einzelner Halbleiter- Schaltelemente keine Regelung oder jedenfalls keine befriedigende Regelung mehr möglich ist.  Another disadvantage of the prior art is that in case of failure of individual semiconductor switching elements no regulation or at least no satisfactory regulation is possible.
Aufgabe der Erfindung ist es, einen Stufenschalter mit Halbleiter-Schaltelementen anzugeben, der einfach aufgebaut ist. Weiterhin soll er einen modularen, erweiterbaren Aufbau besitzen. Schließlich soll der erfindungsgemäße Stufenschalter eine hohe Regelsicherheit und -genauigkeit auch beim Ausfall einzelner Schaltelemente, quasi als Notbetrieb, ermöglichen. The object of the invention is to provide a tap changer with semiconductor switching elements, which is simple. Furthermore, he should have a modular, expandable structure. Finally, the tap changer according to the invention is intended to enable a high level of control safety and accuracy even when individual switching elements fail, virtually as an emergency operation.
Diese Aufgabe wird durch einen Stufenschalter mit den Merkmalen des ersten Patentanspruches gelöst. Die Unteransprüche betreffen besonders vorteilhafte Weiterbildungen der Erfindung. This object is achieved by a tap changer having the features of the first claim. The subclaims relate to particularly advantageous developments of the invention.
Die allgemeine erfinderische Idee besteht darin, den Stufenschalter modular aufzubauen und unterschiedliche Teilwicklungen der Regelwicklung gezielt zu- bzw. gegenzuschalten. The general inventive idea is to build the tap changer modular and selectively connect or disconnect different partial windings of the control winding.
Der erfindungsgemäße Stufenschalter umfasst zwei Schaltbaugruppen, wobei die erste The tap changer according to the invention comprises two switch assemblies, wherein the first
Schaltbaugruppe aus einer Parallelschaltung von zwei Schaltzweigen besteht und sich in jedem Schaltzweig jeweils zwei in Reihe geschaltete Halbleiter-Schaltelemente befinden. Zwischen den beiden Schaltzweigen ist eine erste Teilwicklung geschaltet. Die zweite Schaltbaugruppe besteht aus einer Parallelschaltung von drei Schaltzweigen, wobei sich in jedem Schaltzweig wiederum jeweils zwei in Reihe geschaltete Halbleiter-Schaltelemente befinden. Zwischen erstem und zweitem sowie zwischen zweitem und drittem Schaltzweig befinden sich weitere elektrische Teilwicklungen, die - ebenso wie die erste Teilwicklung - mit der Regelwicklung magnetisch gekoppelt sind, d. h. auf dem jeweiligen Trafoschenkel aufgebracht sind. Switching assembly consists of a parallel connection of two switching branches and in each switching branch are each two series-connected semiconductor switching elements. Between the two switching branches, a first part winding is connected. The second switching module consists of a parallel connection of three switching branches, wherein in each switching branch in turn are each two series-connected semiconductor switching elements. Between the first and second as well as between the second and third switching branch are further electrical part windings, which - are magnetically coupled to the control winding - as well as the first part of the winding, d. H. are applied to the respective transformer legs.
Erfindungsgemäß sind die elektrischen Teilwicklungen unterschiedlich dimensioniert.  According to the invention, the electrical partial windings are dimensioned differently.
Weist in einer Schaltbaugruppe eine dortige Teilwicklung eine bestimmte Zahl von Windungen auf, besitzen die anderen beiden elektrischen Teilwicklungen Windungszahlen, die ein Mehrfaches darstellen.  If a local winding has a specific number of windings in a switching module, the other two electrical partial windings have winding numbers that are a multiple.
Es ist im Rahmen der Erfindung möglich, die Zahl der einzelnen Schaltbaugruppen, die in der Gesamtheit den erfindungsgemäßen Stufenschalter bilden, zu variieren.  It is possible within the scope of the invention to vary the number of individual switching assemblies that form the tap changer according to the invention in their entirety.
Beim erfindungsgemäßen Stufenschalter sind mit nur wenigen Bauteilen zum gezielten Zu- bzw. Gegenschaiten der einzelnen Teilwicklungen eine große Zahl von Spannungsstufungen erreichbar. Beim erfindungsgemäßen Stufenschalter ist weiterhin eine redundante Erzeugung einzelner Teilspannungen möglich; beim im praktischen Betrieb nie auszuschließenden Ausfall einzelner Schaltelemente kann die Regelung dennoch im Wesentlichen fortgeführt werden. In the tap changer according to the invention, a large number of voltage gradations can be achieved with only a few components for targeted closing or countersharing of the individual partial windings. In the tap changer according to the invention is furthermore a redundant generation of individual Partial voltages possible; In the case of failure of individual switching elements, which can never be excluded in practical operation, the regulation can still essentially be continued.
Die Erfindung soll nachstehend an Hand von Zeichnungen beispielhaft noch näher erläutert werden. Es zeigen: The invention will be explained in more detail by way of example with reference to drawings. Show it:
Figur 1 eine erste Ausführungsform eines erfindungsgemäßen Stufenschalters Figure 1 shows a first embodiment of a tap changer according to the invention
Figur 2 eine zweite Ausführungsform Figure 2 shows a second embodiment
Figur 3 eine besondere Dimensionierung des in Fig. 1 gezeigten Stufenschalters FIG. 3 shows a special dimensioning of the tap changer shown in FIG
Figur 4 eine besondere Dimensionierung des in Fig. 2 gezeigten Stufenschalters Figure 4 shows a special dimensioning of the tap changer shown in Fig. 2
Figur 5 ein erstes Halbleiterschaltelement FIG. 5 shows a first semiconductor switching element
Figur 6 ein zweites Halbleiterschaltelement FIG. 6 shows a second semiconductor switching element
Figur 7 ein drittes Halbleiterschaltelement. FIG. 7 shows a third semiconductor switching element.
Figur 1 zeigt einen ersten erfindungsgemäßen Stufenschalter. FIG. 1 shows a first tap changer according to the invention.
Zwischen dem festen, ungeregelten Teil der Wicklung R und der Lastableitung LA ist der hier gezeigte Stufenschalter angeordnet. Er besitzt zwei in Reihe geschaltete Schaltbaugruppen A und B. Die erste Schaltbaugruppe A ihrerseits besitzt eine Parallelschaltung von zwei Zweigen 1 und 2. Im ersten Zweig 1 sind in Reihenschaltung zueinander zwei Halbleiter-Schalteinheiten S1 , S2 vorgesehen. Im parallelen zweiten Zweig 2 sind in Reihenschaltung zueinander zwei weitere Halbleiter- Schalteinheiten S3, S4 vorgesehen. Zwischen den beiden in Reihe geschalteten Halbleiter- Schalteinheiten S1 , S2 im ersten Zweig 1 und den beiden in Reihe geschalteten Halbleiter- Schalteinheiten S3, S4 im zweiten Zweig 2 ist eine erste Teilwicklung W1 der Regelwicklung angeordnet.  Between the fixed, unregulated part of the winding R and the load lead LA of the tap changer shown here is arranged. It has two series-connected switch assemblies A and B. The first switch assembly A in turn has a parallel connection of two branches 1 and 2. In the first branch 1, two semiconductor switching units S1, S2 are provided in series. In the parallel second branch 2, two further semiconductor switching units S3, S4 are provided in series with one another. Between the two series-connected semiconductor switching units S1, S2 in the first branch 1 and the two series-connected semiconductor switching units S3, S4 in the second branch 2, a first partial winding W1 of the control winding is arranged.
Die zweite Schaltbaugruppe B besitzt eine Parallelschaltung von drei Zweigen 3, 4 und 5. Im dritten Zweig 3 sind in Reihenschaltung zueinander zwei Halbleiter-Schalteinheiten S5, S6 , im vierten Zweig 4 sind in Reihenschaltung zueinander zwei Halbleiter-Schalteinheiten S7, S8 und im fünften Zweig 5 in Reihenschaltung zueinander zwei Halbleiter-Schalteinheiten S9, S10 vorgesehen. Zwischen den beiden in Reihe geschalteten Halbleiter-Schalteinheiten S5, S6 im dritten Zweig 3 und den beiden in Reihe geschalteten Halbleiter-Schalteinheiten S7, S8 im vierten Zweig 4 ist eine zweite Teilwicklung W2 der Regelwicklung und zwischen den beiden in Reihe geschalteten Halbleiter-Schalteinheiten S7, S8 im vierten Zweig 4 und den beiden in Reihe geschalteten Halbleiter-Schalteinheiten S9, S10 im fünften Zweig 5 ist eine dritte Teilwicklung W3 angeordnet. Bei dieser Ausführungsform ist die zweite Schaltbaugruppe B mit der Lastableitung LA elektrisch verbunden. The second switch assembly B has a parallel circuit of three branches 3, 4 and 5. In the third branch 3 are connected in series to each other two semiconductor switching units S5, S6, in the fourth branch 4 are connected in series to each other two semiconductor switching units S7, S8 and fifth Branch 5 in series with each other two semiconductor switching units S9, S10 provided. Between the two series-connected semiconductor switching units S5, S6 in the third branch 3 and the two series-connected semiconductor switching units S7, S8 in the fourth branch 4 is a second partial winding W2 of the control winding and between the two series-connected semiconductor switching units S7 . S8 in the fourth branch 4 and the two series-connected semiconductor switching units S9, S10 in the fifth branch 5, a third partial winding W3 is arranged. In this embodiment, the second switch assembly B is electrically connected to the load lead LA.
Figur 2 zeigt eine zweite Ausführungsform eines erfindungsgemäßen Stufenschalters, bei der die erste Schaltbaugruppe A mit der Lastableitung LA elektrisch verbunden ist. Figure 2 shows a second embodiment of a tap changer according to the invention, in which the first switching assembly A is electrically connected to the load lead LA.
Figur 3 zeigt den Stufenschalter aus Figur 1 mit einer besonders vorteilhaften Dimensionierung. Die Lage der einzelnen Bauteile entspricht der Darstellung in Figur 1 , auf die Bezugszeichen wurde demgemäß aus Gründen der Übersichtlichkeit verzichtet. Es ist hier gezeigt, dass die erste FIG. 3 shows the tap changer from FIG. 1 with a particularly advantageous dimensioning. The position of the individual components corresponds to the illustration in Figure 1, to the reference numerals has been omitted accordingly for reasons of clarity. It is shown here that the first
Teilwicklung W1 der Schaltbaugruppe A die siebenfache Windungszahl der zweiten Teilwicklung W2 der Schaltbaugruppe B aufweist; die dritte Teilwicklung W3 ebenfalls der Schaltbaugruppe B weist die doppelte Windungszahl der zweiten Teilwicklung W2 auf. Durch gezieltes Zu- und Gegenschalten der drei Teilwicklungen W1...W3 lassen sich damit insgesamt 21 Spannungsstufen erzeugen. Um die entsprechenden Schaltleistungen zu beherrschen, ist es vorteilhaft, die Halbleiter-Schalteinheiten S5, S6, S9 und S10 jeweils als Reihenschaltung aus hier 3 separaten Halbleiterschaltern und die Halbleiter-Schalteinheiten S7 und S8 jeweils als Reihenschaltung aus hier 2 separaten Partial winding W1 of the switch assembly A seven times the number of turns of the second partial winding W2 of the switch assembly B has; the third partial winding W3 likewise of the switch assembly B has twice the number of turns of the second partial winding W2. By selective connection and counter-switching of the three partial windings W1 ... W3 can thus generate a total of 21 voltage levels. In order to master the corresponding switching powers, it is advantageous for the semiconductor switching units S5, S6, S9 and S10 to be in each case connected in series as a series circuit of here 3 separate semiconductor switches and the semiconductor switching units S7 and S8 as a series circuit from here 2 separate
Halbleiterschaltern auszubilden. Damit sind insgesamt 44 einzelne Halbleiterschalter erforderlich. Semiconductor switches train. This requires a total of 44 individual semiconductor switches.
Figur 4 zeigt den Stufenschalter aus Figur 2 mit einer ebenfalls besonders vorteilhaften Figure 4 shows the tap changer of Figure 2 with a likewise particularly advantageous
Dimensionierung. Die Lage der einzelnen Bauteile entspricht der wiederum der Darstellung in Figur 2, auf die Bezugszeichen wurde demgemäß aus Gründen der Übersichtlichkeit auch hier verzichtet. Es ist hier gezeigt, dass die zweite Teilwicklung W2 der Schaltbaugruppe B die dreifache Windungszahl der ersten Teilwicklung W1 der Schaltbaugruppe A aufweist; die dritte Teilwicklung W3 der Dimensioning. The position of the individual components in turn corresponds to the representation in Figure 2, the reference numerals was accordingly omitted for reasons of clarity here. It is shown here that the second partial winding W2 of the switch assembly B has three times the number of turns of the first partial winding W1 of the switch assembly A; the third partial winding W3 of the
Schaltbaugruppe B weist die sechsfache Windungszahl der ersten Teilwicklung W1 auf. Durch gezieltes Zu- und Gegenschalten der drei Teilwicklungen W1...W3 lassen sich damit insgesamt auch hier 21 Spannungsstufen erzeugen. Um die entsprechenden Schaltleistungen zu beherrschen, ist es vorteilhaft, die Halbleiter-Schalteinheiten S7 und S8 jeweils als Reihenschaltung aus hier 6 separaten Halbleiterschaltern und die Halbleiter-Schalteinheiten S5, S6, S9, S10 jeweils als Reihenschaltung aus hier 9 separaten Halbleiterschaltern auszubilden. Damit sind insgesamt 52 einzelne Switching assembly B has six times the number of turns of the first partial winding W1. Through targeted connection and counter-switching of the three partial windings W1... W3, a total of 21 voltage levels can thus also be generated here. In order to master the corresponding switching powers, it is advantageous to design the semiconductor switching units S7 and S8 in each case as a series circuit of here 6 separate semiconductor switches and the semiconductor switching units S5, S6, S9, S10 each as a series circuit of 9 separate semiconductor switches here. This is a total of 52 individual
Halbleiterschalter erforderlich. Semiconductor switch required.
Es sind im Rahmen der Erfindung auch andere Dimensionierungen der Teilwicklungen W1...W3 als auch der Halbleiter-Schaltelemente S1...S10 möglich. Within the scope of the invention, other dimensions of the partial windings W1... W3 as well as of the semiconductor switching elements S1... S10 are also possible.
Figur 5 zeigt einen einzigen Schalter, der ein antiparallel geschaltetes Thyristorpaar, als Figure 5 shows a single switch, the antiparallel switched thyristor pair, as
Halbleiterschalteinheit aufweist. Figur 6 zeigt eine Reihenschaltung von zwei einzelnen Halbleiterschaltern Sa und Sb, die eines der Halbleiterschaltelemete S1...S10 ergeben können. Semiconductor switching unit has. FIG. 6 shows a series connection of two individual semiconductor switches Sa and Sb, which can yield one of the semiconductor switching elements S1... S10.
Figur 7 zeigt eine Reihenschaltung von vier einzelnen Halbleiterschaltern Sa...Sd, die ebenfalls eines der Halbleiterschaltelemete S1...S10 ergeben können. Figure 7 shows a series connection of four individual semiconductor switches Sa ... Sd, which can also give one of the Halbleiterschaltelemete S1 ... S10.
Die einzelnen Halbleiterschalter sind hier beispielhaft als antiparallel geschaltete Thyristorpaare dargestellt; es sind im Rahmen der Erfindung auch andere bekannte Halbleiter-Schalter, IGBTs etwa, möglich. The individual semiconductor switches are shown here by way of example as antiparallel-connected thyristor pairs; In the context of the invention, other known semiconductor switches, IGBTs, for example, are also possible.

Claims

Patentansprüche claims
1. Stufenschalter zur Spannungsregelung mit Halbleiter-Schaltelementen an einem 1. Tap changer for voltage regulation with semiconductor switching elements on one
Regeltransformator mit einer Regelwicklung,  Control transformer with a control winding,
wobei der Stufenschalter zwei in Reihe geschaltete Schaltbaugruppen (A, B) aufweist, wobei die erste Schaltbaugruppe (A) ihrerseits eine Parallelschaltung von zwei Zweigen (1 , 2) besitzt,  the tap changer having two switch assemblies (A, B) connected in series, the first switch assembly (A) in turn having a parallel connection of two branches (1, 2),
wobei im ersten Zweig (1) in Reihenschaltung zueinander zwei Halbleiter-Schalteinheiten (S1 , S2) und im parallelen zweiten Zweig (2) in Reihenschaltung zueinander zwei weitere  wherein in the first branch (1) in series with each other two semiconductor switching units (S1, S2) and in the parallel second branch (2) in series with each other two more
Halbleiter-Schalteinheiten (S3, S4) vorgesehen sind,  Semiconductor switching units (S3, S4) are provided,
wobei zwischen den beiden in Reihe geschalteten Halbleiter-Schalteinheiten (S1 , S2) im ersten Zweig (1) und den beiden in Reihe geschalteten Halbleiter-Schalteinheiten (S3, S4) im zweiten Zweig (2) eine erste Teilwicklung (W1) der Regelwicklung angeordnet ist, wobei die zweite Schaltbaugruppe (B) eine Parallelschaltung von drei Zweigen (3, 4 und 5) aufweist,  wherein between the two series-connected semiconductor switching units (S1, S2) in the first branch (1) and the two series-connected semiconductor switching units (S3, S4) in the second branch (2), a first part winding (W1) of the control winding arranged wherein the second switch assembly (B) comprises a parallel connection of three branches (3, 4 and 5),
wobei im dritten Zweig (3) in Reihenschaltung zueinander zwei Halbleiter-Schalteinheiten (S5, S6) , im vierten Zweig (4) in Reihenschaltung zueinander zwei Halbleiter-Schalteinheiten (S7, S8) und im fünften Zweig (5) in Reihenschaltung zueinander zwei Halbleiter-Schalteinheiten (S9, S10) vorgesehen sind,  wherein in the third branch (3) in series with each other two semiconductor switching units (S5, S6), in the fourth branch (4) in series with each other two semiconductor switching units (S7, S8) and in the fifth branch (5) in series with each other two semiconductors Switching units (S9, S10) are provided,
wobei zwischen den beiden in Reihe geschalteten Halbleiter-Schalteinheiten (S5, S6) im dritten Zweig (3) und den beiden in Reihe geschalteten Halbleiter-Schalteinheiten (S7, S8) im vierten Zweig (4) eine zweite Teilwicklung (W2) der Regelwicklung und zwischen den beiden in Reihe geschalteten Halbleiter-Schalteinheiten (S7, S8) im vierten Zweig (4) und den beiden in Reihe geschalteten Halbleiter-Schalteinheiten (S9, S10) im fünften Zweig (5) eine dritte Teilwicklung (W3) angeordnet ist  wherein between the two series-connected semiconductor switching units (S5, S6) in the third branch (3) and the two series-connected semiconductor switching units (S7, S8) in the fourth branch (4), a second part winding (W2) of the control winding and between the two series-connected semiconductor switching units (S7, S8) in the fourth branch (4) and the two series-connected semiconductor switching units (S9, S10) in the fifth branch (5) a third partial winding (W3) is arranged
und wobei eine der beiden Schaltbaugruppen (A oder B) mit der Lastableitung (LA) elektrisch verbunden ist.  and wherein one of the two switch assemblies (A or B) is electrically connected to the load lead (LA).
2. Stufenschalter nach Anspruch 1 , 2. tap changer according to claim 1,
dadurch gekennzeichnet,  characterized,
dass die Teilwicklungen (W1...W3) unterschiedliche Wicklungszahlen besitzen.  that the partial windings (W1 ... W3) have different numbers of turns.
3. Stufenschalter nach Anspruch 1 oder 2, 3. tap changer according to claim 1 or 2,
dadurch gekennzeichnet,  characterized,
dass mindestens eine der Halbleiter-Schalteinheiten (S1...S10) aus einer Reihenschaltung von zwei oder mehreren einzelnen Halbleiterschaltern besteht.  in that at least one of the semiconductor switching units (S1 ... S10) consists of a series connection of two or more individual semiconductor switches.
EP12701516.2A 2011-02-05 2012-01-30 Stepping switch Withdrawn EP2671128A2 (en)

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DE102011010388A DE102011010388A1 (en) 2011-02-05 2011-02-05 step switch
PCT/EP2012/051397 WO2012104232A2 (en) 2011-02-05 2012-01-30 Stepping switch

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BR112013018024A2 (en) 2019-09-24
AU2012213582A1 (en) 2013-08-29
US20140197816A1 (en) 2014-07-17
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DE202011110289U1 (en) 2013-05-28
WO2012104232A2 (en) 2012-08-09

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