WO2001022447A1 - Dispositif de commutation electrique, procede de controle du dispositif et utilisation du dispositif - Google Patents

Dispositif de commutation electrique, procede de controle du dispositif et utilisation du dispositif Download PDF

Info

Publication number
WO2001022447A1
WO2001022447A1 PCT/SE2000/001759 SE0001759W WO0122447A1 WO 2001022447 A1 WO2001022447 A1 WO 2001022447A1 SE 0001759 W SE0001759 W SE 0001759W WO 0122447 A1 WO0122447 A1 WO 0122447A1
Authority
WO
WIPO (PCT)
Prior art keywords
switching
contact
members
contact member
conductor
Prior art date
Application number
PCT/SE2000/001759
Other languages
English (en)
Inventor
Tommy Larsson
Lahan Konov
Martin Johansson
Original Assignee
Abb Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abb Ab filed Critical Abb Ab
Priority to AU76935/00A priority Critical patent/AU7693500A/en
Publication of WO2001022447A1 publication Critical patent/WO2001022447A1/fr

Links

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

Definitions

  • An electric switching device a method for controlling the device and a use of the switching device
  • the present invention relates to an electric switching device for switching over a current path from a first electric conductor to a second electric conductor, comprising a first contact member and a set of second contact members, which are arranged after each other along a path, the first contact member being movably arranged in relation to the second contact members along said path for the achievement of an electric connection with each of these, said set of second contact members comprising two main contact members, each of which being connected to one of said conductors, and at least one switching contact member arranged between the main contact members, and the first contact member being arranged to allow the simultaneous contacting of two adjacent second contact members.
  • the switching device is particularly intended for switching over a current path between two electric conductors in such a case when the current should not be broken during the switching over.
  • the switching device is more closely intended to be used for switching over a current path in components in electric power plants or electric power networks.
  • the switching device is intended to be used for system voltages exceeding 1 kV.
  • the switching device is particularly intended for use as a load cou- pier in a tap changer for a transformer.
  • a so-called dry transformer is particularly referred to.
  • Such a transformer is de- scribed in the document WO 97/45847.
  • the windings here consist of a cable with an electrically conductive conductor, a semiconducting inner layer surrounding the conductor, an electrically insulating cable body surrounding the inner layer, and a semiconducting outer layer surrounding the cable body.
  • the inner layer is in electric contact with the conductor and has the same potential as this.
  • the potential of the outer layer is controllable and is normally set to zero by grounding of the outer layer.
  • Such a winding has the characteristic that it, in the cable body between the inner and the outer layer, encloses the electrical field that surrounds the conductor of the cable. Since the outer layer has a constant potential, adjacent turns of the winding do not have to be insulated from each other. If the potential of the outer layer furthermore is connected to ground, the wind- ings do not have to be insulated from the transformer core and the transformer can operate without any electrically insulating transformer oil, which results in a number of technical and environmental advantages.
  • the invention relates to a method for controlling the switching device according to the preamble of subsequent claim 16.
  • the switching over of the current path should be carried out in such a way that neither current interruption ensues nor step short-circuiting of the transformer takes place.
  • two switching contact members are arranged between the main contact members along said path. Each of these switching contact members is connected to the conductor from the adjacent main contact member via a resistor.
  • the contact members are furthermore arranged in said transformer oil. Arcs ensue during the movement of the first contact member, which has a destructive influence on the oil and wears out contact parts.
  • a primary purpose of the invention is to provide ways to design the device and the method so that the occurrence of arcs and problems related thereto are reduced in relation to previous technique during the switching over of a current path between two conductors.
  • a further purpose of the invention is to create prerequisites for a more controlled switching over of the current path.
  • the switching device comprises an arrangement, connected to said switching contact members and said two conductors, for connection and disconnection of said switching contact members to and from, respectively, said two conductors.
  • connection and disconnection By a suitable control of said connection and disconnection, the occurrence of arcs during the movement of the first contact member can be eliminated or at least strongly reduced.
  • an electric connection between said switching contact members and each of said conductors can be achieved and broken, prerequisites are furthermore created for carrying out the movement of the first contact member with a lower velocity in relation to the second contact members as compared to previous technique. This results in a reduced wear on the contact parts and possibilities of, for instance, interrupting the movement in case of an error.
  • the device comprises two switching contact members arranged be- tween the main contact members, and the switching arrangement being arranged for connecting and disconnecting each of these to and from, respectively, only one of said two electric conductors.
  • each of the switching contact mem- bers is arranged for connection and disconnection to and from, respectively, the conductor that connects to the main contact member that is arranged adjacent to the switching contact member.
  • the switching arrangement comprises two switching members, which are arranged for breaking and closing, respectively, the current paths between said switching contact members and the electric conductors.
  • Each of the switching members comprises an electric circuit, which connects two poles, a first of which is electri- cally connected to the switching contact member and a second of which is electrically connected to said conductors.
  • each switching member comprises a controllable power semiconductor device arranged to be controllable between said states of closing and breaking current paths.
  • the power semiconductor device also can be turned-off.
  • a power semiconductor device can for instance be an IGBT.
  • vacuum bottles are used instead of such power semiconductor devices, which implies that resistors have to be connected in series for the current to take the correct way and be limited in the respective state. The losses in these resistors are considerable. Thanks to the inventional arrangement of a controllable power semiconductor device instead of such vacuum bottles, the necessity of such resistors disappears and the losses in the switching arrangement itself can be reduced considerably.
  • the device comprises at least one arrangement for proving the function of one of said switching members.
  • the proving arrangement comprises a current source connected to the switching member and a means for current detection connected in series with the current source. In this way, by a suitable design of the proving arrangement as to the rest, it can be proved that the switching member is functioning.
  • the proving of the function is suitably carried out before as well as after the closing and breaking operation, respectively.
  • the device comprises a power member, suitably in the form of an electric motor, for the achievement of the movement of the first contact member in relation to the second contact members.
  • the power member is connected to a network.
  • the device comprises a member for storing electric energy, which is connected in paral- lei with the power member. In case of drop of the supply voltage from the network to the motor, the risk of the first contact member ending up in a position between the two main contact members is thereby reduced. In this way, the movement of the first contact member can be controlled in such a way that the differ- ent parts of the movement operation can be carried out in optimal time intervals.
  • connection and disconnection of said switching contact members to the first conductor and from the second conductor, respectively, is carried out at least essentially while the current through these, which is an alternating current, has a zero- crossing.
  • Zero-crossing here refers to that the current through said switching contact member goes towards zero and changes polarity, which takes place twice every twentieth millisecond in a 50 Hz-network.
  • the changing-over of said switching contact member from the first conductor to the second conductor is preferably carried out essentially instantaneously at the zero- crossing. In this way, the risk of arcs ensuing at the changing- over operation is practically eliminated.
  • Fig 1 illustrates schematically the switching device according to the preferred embodiment.
  • Fig 2 illustrates an example of an arrangement comprised in the switching device for proving the function of a switching member.
  • Fig 1 illustrates a switching device according to a preferred embodiment.
  • a first switching member 1 is displaceably arranged in relation to a set of stationary, second contact members 2, 3, 4, 5.
  • the first contact member 1 is more specifically displaceably arranged on a contact means 6 in electrical contact with the same.
  • the contact means 6 here consists of an electric contact rail and defines an essentially rectilinear movement path for the first contact member 1 .
  • Said set of second contact members comprises two main contact members 2, 5.
  • the main contact member 2 being the left one in the figure is constantly connected to a first electric conductor 7 and the main contact member 5 being the right one in the figure is constantly connected to a second electric conductor 8.
  • the contact means 6 is connected to a further electric conductor 9.
  • a branching 7a of the first conductor 7 leads via a switching arrangement 10 to a switching contact member 3 located between the main contact members 2, 5.
  • the switching contact member 3 is more specifically connected to the branching 7a via an electrically controlled switching member 1 1 .
  • a further switching contact member 4 is connected to a branching 8a from the second conductor 8 via an electrically controlled switching member 12.
  • Each of the switching members 1 1 , 12 mechanically connects two poles 13, 14, a first 13 of which is electrically connected to the switching contact member 3 and 4, respectively, and a second 14 of which is electrically connected to said conductors 7 and 8, respectively. Closing and breaking, respectively, of each of the switching members 1 1 , 12 is con- trolled by a control unit 15.
  • the electric motor 16 is connected to a network 17 for voltage supply.
  • a member 18 for storage of electric energy is connected in parallel with the electric motor 16.
  • the energy storage mem- ber consists, in the preferred example, of a capacitor, but can of course also consist of any other energy storage component, such as a battery.
  • the capacitor is chosen with a sufficient energy storage capability for being able to provide the electric motor 16 with sufficient electric energy for this to be able to move the first contact member 1 from the left main contact member 2 to the right main contact member 5. In this way, it is guaranteed that the first contact member 1 will not stop in a position between the main contact members 2, 5 in case of a volt- age drop off from the network 17.
  • the switching device is controlled in the following way:
  • the switching member 1 1 is made to electrically connect the switching contact member 3 and the first conductor 7. Thereafter, the first contact member 1 is moved to a position, in which it contacts the switching contact member 3. When the first contact member 1 drops the contact with the main contact member 2, the current path is led only to the first conductor 7 via the switching contact member 3 and the switching member 1 1 . Thereafter, the first contact member 1 is moved to a position, in which it is in electric contact with the left switching contact member 3 as well as the right switching contact member 4.
  • the switching member 1 1 When the current, which is an alternating current, has a zero- crossing , or at least within a relatively short time interval around the zero-crossing, the switching member 1 1 is made to break the current from the switching contact member 3 to the first con- ductor 7 and the switching member 12 is made to essentially simultaneously close the electric contact between the switching contact member 4 and the second conductor 8. In this way, the current path has now been switched over from the first conductor 7 to the second conductor 8.
  • the first contact member 1 is moved into electric contact with the right main contact member 5.
  • the switching member 12 is suitably made to break the electric connection between the switching contact member 4 and the second conductor 8.
  • the first contact member is arranged to contact to adjacent second contact members 2, 3, 4, 5 simultaneously during the movement.
  • Fig 2 illustrates an arrangement 19 for proving the function of one of said switching members 1 1 .
  • the proving arrangement 19 comprises a current source 20 and a current detection means 21 , connected in series with the current source 20.
  • the switching member 1 1 comprises a transistor 22 for effectuating said breaking and closing.
  • the transistor 22 more specifically consists of a so- called IGBT (Insulated Gate Bipolar Transistor).
  • the power source 20 consists of a transformer, which generates alternating current.
  • a rectifier diode 23 is connected in series with the transformer 20 between the transformer 20 and the current detection means 21 .
  • the diode 23 prevents voltages lying across said IGBT from carrying a current through the current detection means 21 , when the first contact member 1 is electrically connected with the pole 13 and said IGBT breaks the electric connection between the poles 13 and 14.
  • the current source 20 is connected to an input terminal in the form of a collector 25 in said IGBT 22.
  • An output terminal in the form of an emitter 25 in said IGBT is connected to the current detection means 21 .
  • the control unit 15, see Fig 1 is connected to a signal input terminal in the form of the gate 26 in said IGBT.
  • the switching member 1 1 comprises a member 27 for achieving that said IGBT in case of applied load current on the poles 13 and 14 only is traversed by a current in one direction.
  • the rectifier member consists of a rectifier bridge 27.
  • a diode 28 is connected in parallel with the current detection means 21 and is orientated in the opposite direction in relation to the diode 23.
  • the alternating current gen- erated by the transformer 20 is semi-rectified by the diode 23 and the current is detected by the current detection means 21 .
  • the current detection means 21 consists of a so-called op- toswitch.
  • the optoswitch in its turn comprises a light emitting diode 30.
  • the optoswitch furthermore comprises a photosensitive member 31 in the form of a phototransistor.
  • the phototransistor 31 in its turn generates a square wave when said current flows through the light emitting diode 30.
  • a resistance 32 is connected in series with the light emitting diode 30 in order to limit the current through the light emitting diode.
  • the diode 28 connected in parallel with the current detection means 21 makes sure that the voltage during loading of said IGBT 22 via the poles 13 and 14 is not lying across the current detection means 21 . Thanks to the above described internal constitution of the function proving arrangement 19, it is possible to prove said IGBT during load current via the poles 13, 14 as well as without connected load current.
  • said IGBT is arranged in such a state that it breaks an electric connection between the collector 24 and the emitter 25.
  • the current source 20 is connected for generation of the current. Since said IGBT does not close any electric connection between the collector 24 and the emitter 25, no current is detected by the current detection means 21 if said IGBT 22, the bridge 27 and the function proving arrangement is functioning. If, after all, the current detection means 21 detects a current, this indicates that said IGBT 22 conducts a current and that an error is present in the control unit or said IGBT.
  • the current detection means 21 When said IGBT 22 is arranged in a position, in which it closes the electric connection between the collector 24 and the emitter 25, the current detection means 21 will however detect a current if said IGBT 22, the bridge 27 and the components comprised in the function proving arrangement 19 are functioning when the current source generates a current. If no detection of current takes place in the current detection means 21 , this indicates that said IGBT, the bridge 27 or any of the components in the function proving arrangement 19 is not functioning.
  • the switching members 1 1 and 12 closes is suitably proved by means of the function proving arrangement 19 before the first contact member 1 is moved out of contact with the main contact member 2. Thereafter, the right switching member 12 is made to break and the first contact member 1 is moved to the switching contact member 3. Then the first contact member 1 is moved into the position, in which it is in contact with both switching contact members 3 and 4. The left switching member 1 1 is made to break and the right switching member 12 is made to close. Should the switching member 1 1 not function, the first contact member 1 is brought back into contact with only the switching contact member 3. In case of an error message for any of the switching members 1 1 and 12, the movement of the first contact member 1 can consequently be reversed. In order to achieve the above described controlling of the movement of the first contact member 1 , the control unit 15 is also arranged to control the power transmission from the electric motor 16 to the first contact member 1 .
  • the switching device comprises members 33 for detecting the position of the first contact member 1 .
  • the detection members 33 are arranged to detect that the first contact member 1 is in contact with the switching contact member 3 and the switching contact member 4, respectively. In this way the function of the switching members 1 1 and 12, respectively, can be proved at the very same moment as the first contact member 1 has been brought into electric contact with the switching contact member 3 and the switching contact member 4, respectively.
  • Said detection members can be designed in a number of different ways and the detection can for instance be carried out optically or mechanically.
  • the denomination switching member refers to different types of switches and said IGBT is only to be considered as an example of such a switch.
  • a switch is preferably used which does not require a galvanic separation of two metallic contacts. Therefore, an electric circuit with a semiconductor based switch for effectuating said breaking and closing is preferably used.
  • an electric circuit having a power semiconductor component such as a thy- ristor, MOSFET, GTO, IGCT or the above described IGBT, for effectuating said breaking and closing.
  • the above described electric switching device is preferably used as a load coupler in a tap changer for a transformer. It is in particular preferred to use the switching device in a dry transformer environment. Dry transformer environment refers to that the transformer winding is not arranged in any dielectric liquid, such as oil. By connecting a dry tap changer comprising the inven- tional load coupler to such a dry transformer, an arrangement is obtained which does not need said electrically insulating oil. This results in environment technical as well as maintenance technical advantages.
  • the diodes 23 and 28 are of such a type that they will not break down in case of a high voltage, such as several thousands of volts. It is emphasized that the embodiment dealt with above and illustrated in the drawing is only to be considered as exemplifying. Consequently, the invention can be implemented in other ways with the basic inventional idea being retained. It is particularly pointed out that men skilled in the art after having obtained knowledge about the inventional solution of course will be capable of performing different transformations of the exemplifying embodiment without for that sake going beyond the scope of the patent protection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Push-Button Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

L'invention concerne un dispositif de commutation électrique pour la commutation de trajet en cours depuis un premier conducteur électrique (7) vers un second conducteur électrique (8), qui comprend un premier contact (1) et une série de seconds contacts (2, 3, 4, 5) disposés l'un après l'autre suivant un trajet. Le premier contact (1) est disposé mobile par rapport aux seconds contacts, sur le trajet considéré, pour l'établissement d'une connexion électrique avec chacun de ces contacts. La série en question comprend deux contacts principaux (2, 5), chacun relié à l'un des conducteurs (7, 8), et au moins un contact de commutation (3, 4) placé entre les contacts principaux. Le premier contact (1) permet le contact simultané de deux contacts adjacents de la série de seconds contacts. En outre, le dispositif de commutation comprend un arrangement (10) relié au contact de commutation (3, 4) et aux deux conducteurs (7, 8) pour la connexion et la déconnexion du contact de commutation (3, 4) respectivement par rapport aux deux conducteurs (7, 8).
PCT/SE2000/001759 1999-09-20 2000-09-12 Dispositif de commutation electrique, procede de controle du dispositif et utilisation du dispositif WO2001022447A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU76935/00A AU7693500A (en) 1999-09-20 2000-09-12 An electric switching device, a method for controlling the device and a use of the switching device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9903392A SE9903392L (sv) 1999-09-20 1999-09-20 Elektrisk kopplingsanordning, förfarande för styrning av densamma och användning av kopplingsanordningen
SE9903392-0 1999-09-20

Publications (1)

Publication Number Publication Date
WO2001022447A1 true WO2001022447A1 (fr) 2001-03-29

Family

ID=20417080

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/001759 WO2001022447A1 (fr) 1999-09-20 2000-09-12 Dispositif de commutation electrique, procede de controle du dispositif et utilisation du dispositif

Country Status (3)

Country Link
AU (1) AU7693500A (fr)
SE (1) SE9903392L (fr)
WO (1) WO2001022447A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2873489A1 (fr) * 2004-07-20 2006-01-27 Areva T & D Sa Systeme de changement de prise de transformateur en charge
WO2010072623A1 (fr) * 2008-12-22 2010-07-01 Siemens Aktiengesellschaft Transformateur moyenne/basse tension à commutation plot par plot et son procédé d'utilisation
DE102010008973A1 (de) 2010-02-24 2011-08-25 Maschinenfabrik Reinhausen GmbH, 93059 Stufenschalter
DE102010008972A1 (de) 2010-02-24 2011-08-25 Maschinenfabrik Reinhausen GmbH, 93059 Stufenschalter
DE102010008974A1 (de) 2010-02-24 2011-08-25 Maschinenfabrik Reinhausen GmbH, 93059 Stufenschalter
US8289068B2 (en) 2008-08-27 2012-10-16 Maschinenfabrik Reinhausen Gmbh Method for switching without any interruption between winding taps on a tap-changing transformer
US8415987B2 (en) 2008-08-27 2013-04-09 Maschinenfabrik Reinhausen Gmbh Tap switch with semiconductor switching elements
US9557754B2 (en) 2014-04-22 2017-01-31 General Electric Company Load tap changer
US9570252B2 (en) 2014-01-27 2017-02-14 General Electric Company System and method for operating an on-load tap changer
WO2022053239A1 (fr) * 2020-09-09 2022-03-17 Maschinenfabrik Reinhausen Gmbh Changeur de prises en charge et procédé pour actionner un changeur de prises en charge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381213A (en) * 1966-03-29 1968-04-30 Westinghouse Electric Corp Tap changer apparatus
DE1901105A1 (de) * 1968-02-16 1969-10-02 Siemens Ag Schaltungsanordnung zum unterbrechungslosen Lastumschalten bei Stufentransformatoren
DE1803741A1 (de) * 1968-10-18 1970-07-30 Siemens Ag Anordnung zur Lastumschaltung bei Stufentransformatoren oder -drosseln
DE2209500A1 (de) * 1972-02-29 1973-09-06 Transformatoren Union Ag Schaltungsanordnung zum unterbrechungslosen lastumschalten bei stufentransformatoren
US5574385A (en) * 1994-04-28 1996-11-12 Ics Triplex, Inc. Testable solid state switch and related method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381213A (en) * 1966-03-29 1968-04-30 Westinghouse Electric Corp Tap changer apparatus
DE1901105A1 (de) * 1968-02-16 1969-10-02 Siemens Ag Schaltungsanordnung zum unterbrechungslosen Lastumschalten bei Stufentransformatoren
DE1803741A1 (de) * 1968-10-18 1970-07-30 Siemens Ag Anordnung zur Lastumschaltung bei Stufentransformatoren oder -drosseln
DE2209500A1 (de) * 1972-02-29 1973-09-06 Transformatoren Union Ag Schaltungsanordnung zum unterbrechungslosen lastumschalten bei stufentransformatoren
US5574385A (en) * 1994-04-28 1996-11-12 Ics Triplex, Inc. Testable solid state switch and related method

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1619698A3 (fr) * 2004-07-20 2006-03-01 Areva T&D SA Système de changement de prise transformateur en charge
US7355369B2 (en) 2004-07-20 2008-04-08 Areva T&D Sa On-load transformer tap changing system
FR2873489A1 (fr) * 2004-07-20 2006-01-27 Areva T & D Sa Systeme de changement de prise de transformateur en charge
US8289068B2 (en) 2008-08-27 2012-10-16 Maschinenfabrik Reinhausen Gmbh Method for switching without any interruption between winding taps on a tap-changing transformer
US8415987B2 (en) 2008-08-27 2013-04-09 Maschinenfabrik Reinhausen Gmbh Tap switch with semiconductor switching elements
CN102077306B (zh) * 2008-08-27 2013-03-27 赖茵豪森机械制造公司 可调式变压器的绕组分接头之间无中断的切换方法
WO2010072623A1 (fr) * 2008-12-22 2010-07-01 Siemens Aktiengesellschaft Transformateur moyenne/basse tension à commutation plot par plot et son procédé d'utilisation
RU2516462C2 (ru) * 2008-12-22 2014-05-20 Сименс Акциенгезелльшафт Трансформатор среднего и низкого напряжения со ступенчатым переключением и способ его эскплуатации
DE102010008972A1 (de) 2010-02-24 2011-08-25 Maschinenfabrik Reinhausen GmbH, 93059 Stufenschalter
WO2011103909A1 (fr) 2010-02-24 2011-09-01 Maschinenfabrik Reinhausen Gmbh Commutateur à gradins
WO2011103908A1 (fr) 2010-02-24 2011-09-01 Maschinenfabrik Reinhausen Gmbh Commutateur à gradins
CN102770929A (zh) * 2010-02-24 2012-11-07 赖茵豪森机械制造公司 分接开关
WO2011103907A1 (fr) 2010-02-24 2011-09-01 Maschinenfabrik Reinhausen Gmbh Commutateur à gradins
DE102010008974A1 (de) 2010-02-24 2011-08-25 Maschinenfabrik Reinhausen GmbH, 93059 Stufenschalter
DE102010008973A1 (de) 2010-02-24 2011-08-25 Maschinenfabrik Reinhausen GmbH, 93059 Stufenschalter
US9024596B2 (en) 2010-02-24 2015-05-05 Maschinenfrabrik Reinhausen GmbH Tap changer
DE102010008973B4 (de) * 2010-02-24 2015-11-05 Maschinenfabrik Reinhausen Gmbh Stufenschalter des Hybridtyps mit Halbleiterschaltelementen
CN102770929B (zh) * 2010-02-24 2015-12-02 赖茵豪森机械制造公司 分接开关
US9570252B2 (en) 2014-01-27 2017-02-14 General Electric Company System and method for operating an on-load tap changer
US9557754B2 (en) 2014-04-22 2017-01-31 General Electric Company Load tap changer
WO2022053239A1 (fr) * 2020-09-09 2022-03-17 Maschinenfabrik Reinhausen Gmbh Changeur de prises en charge et procédé pour actionner un changeur de prises en charge

Also Published As

Publication number Publication date
AU7693500A (en) 2001-04-24
SE9903392L (sv) 2001-03-21
SE9903392D0 (sv) 1999-09-20

Similar Documents

Publication Publication Date Title
US7355369B2 (en) On-load transformer tap changing system
CN105830344B (zh) 用于导通和切断电流的开关装置
CA2427039C (fr) Commutateur bidirectionnel haute vitesse a semiconducteurs
US8203319B2 (en) Transformer on-load tap changer using MEMS technology
Ängquist et al. A new dc breaker with reduced need for semiconductors
JP2008048588A (ja) 複合型超電導限流器
CN104362751B (zh) 一种智能切换开关
JP2008048588A5 (fr)
KR101233048B1 (ko) 한류기
WO2001022447A1 (fr) Dispositif de commutation electrique, procede de controle du dispositif et utilisation du dispositif
EP1991919A1 (fr) Changeur de prises en charge hybride et procede d'utilisation associe
CN108701556B (zh) 直流电压开关
GB2178255A (en) Solid state power controller with leakage current shunt circuit
US4652962A (en) High speed current limiting circuit interrupter
US10490365B2 (en) Direct-current switching device
EP3531523B1 (fr) Gestion de défaut
US8194378B2 (en) Line commutation type fault current limiter
CN112151252A (zh) 一种用于高压输电变压器的有载分接开关及其控制方法
RU2597998C2 (ru) Выключатель для участка передачи постоянного тока высокого напряжения
CN109417282B (zh) 半导体切断设备
RU2321945C2 (ru) Переключающее устройство для надежного переключения токовых цепей
CN103650086A (zh) 开关装置
KR101053665B1 (ko) 한류 장치
US20170344039A1 (en) Arcless Tap Changer Using Gated Semiconductor Devices
KR100981824B1 (ko) 고장 전류 구동 차단기

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ CZ DE DE DK DK DM DZ EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP