[go: up one dir, main page]

WO2011103909A1 - Commutateur à gradins - Google Patents

Commutateur à gradins Download PDF

Info

Publication number
WO2011103909A1
WO2011103909A1 PCT/EP2010/007935 EP2010007935W WO2011103909A1 WO 2011103909 A1 WO2011103909 A1 WO 2011103909A1 EP 2010007935 W EP2010007935 W EP 2010007935W WO 2011103909 A1 WO2011103909 A1 WO 2011103909A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
semiconductor switching
scsb
scsa
load
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.)
Ceased
Application number
PCT/EP2010/007935
Other languages
German (de)
English (en)
Inventor
Oliver BRÜCKL
Udo Hertel
Armin Hirthammer
Anatoli Saveliev
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 WO2011103909A1 publication Critical patent/WO2011103909A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • 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

Definitions

  • the invention relates to a tap changer with semiconductor switching elements for uninterrupted switching between winding taps of a tapped transformer.
  • a tap changer with semiconductor switching elements which is designed as a hybrid switch, is known from WO 01/22447.
  • This known tap changer has a hybrid switch
  • the mechanical part which is the actual subject of WO 01/22447, has mechanical switching contacts; central part is a moving one
  • the object of the invention is to provide a tap changer of the type mentioned, which is simple in construction, has a high reliability and in which it is not necessary to have to switch only exactly at the zero crossing of the load current. It is another object of the invention to provide such a tap changer, which can be used as a standard device for a variety of tapped transformers, without the need for a transformer-specific adaptation.
  • the invention is based on two semiconductor switching units, each switching unit having two antiparallel-connected IGBTs. Each individual IGBT is assigned a parallel connected varistor.
  • the varistor is dimensioned such that the varistor voltage is less than the maximum blocking voltage of the respective parallel IGBT, but greater than the maximum instantaneous value of the step voltage.
  • the semiconductor switching units are switched on and off by mechanical contacts and can be connected to the load discharge.
  • Figure 1 shows a tap changer according to the invention in a schematic representation
  • Figure 1a is a schematic representation of alternative contact training
  • Figure 2 shows the semiconductor switching units of such a tap changer according to the invention in
  • FIG. 4 further developed semiconductor switching units
  • FIG. 5 shows a possible implementation of a device according to the invention
  • FIG. 6 shows an enlarged detailed representation of the semiconductor switching units shown in FIG.
  • Figure 7 shows another, particularly advantageous device implementation.
  • FIG. 1 shows a tap changer according to the invention. Shown here are two load branches A and B, which can be connected with two winding taps of a tapped transformer by a respective mechanical contact. Each of the two load branches A and B has a mechanical
  • Main contact MCa or MCb which carries the current of the respectively connected load branch in stationary operation and establishes a direct connection to a load lead LA.
  • each load branch A or B Parallel to the respective main contact MCa, MCb, each load branch A or B has a series connection of a further mechanical contact TCa, TCb and in each case a semiconductor switching unit SCSa, SCSb.
  • the semiconductor switching units SCSa, SCSb are electrically connected to one another and lead to a mechanical transition contact TC whose other side is connected to the load lead LA.
  • FIG. 1a shows a tap changer according to the invention, again having two load branches A and B.
  • the mechanical contacts TCa, TCb and TC already explained are designed here as double-break contacts.
  • FIG. 2 shows the two semiconductor switching units SCSa and SCSb in detail.
  • These two semiconductor switching units SCSa, SCSb represent the actual semiconductor switch SCS. It consists of the following components: In total, four IGBTs T1... T4 are provided, of which two are in each path. The IGBT's are driven in pairs. In the case where the load path A is the turn-off side, first, the IGBTs T1 and T2 are turned on. Since the current direction in the Umschaltmoment is random, the IGBT's are connected in series against each other. During the changeover to the other load branch or path B, the IGBTs 1 and 2 are switched off and the IGBTs of the other side are switched on almost simultaneously. Parallel to each IGBT T1 ... T4 diodes D1 ... D4 are provided. In parallel, there is a Varistor Varl ... Var4 connected in each case. These varistors are used to discharge or charge the stray impedances
  • FIG. 3 shows a further developed embodiment of such a semiconductor switch SCS.
  • a protection varistor Var5 or Var6 is provided in each branch parallel to the respective semiconductor switching unit SCSa, SCSb, and a current sensor IS1 is provided in series therewith. Normally these protection varistors Var5 and Var6 are not active. However, contrary to expectations, one or more of the illustrated varistors
  • Var1 ... Var4 or IGBT's T1 ... T4 should go into a high-impedance state in the event of a fault, the current is passed through the Var Varistors Var6 or Var6 in the respective branch.
  • the voltage is limited so that the tap changer can successfully complete at least the already started switching operation without damage.
  • the additional built-in current sensor IS1 is simultaneously effective in both paths. During the regular, error-free switching of the
  • Tap-changer remains de-energized. In the case of an error, however, a flowing current is detected by it, which can trigger an error signal. This makes it possible in a simple way to signal to the outside that there is a fault in the tap changer. At the same time, this current can also be used to block the tap changer in a known manner and to prevent further circuits until the fault is rectified.
  • Var Var, Var6 varistors are also an aO protection.
  • FIG. 4 shows a further developed circuit of a semiconductor switch SCS.
  • the two (shown in the circuit below) sides of the semiconductor switching units SCSa, SCSb are not directly connected to each other electrically and thus do not lead directly to the transitional contact TC shown in Figure 1, but have in each branch nor a parallel circuit of a fuse F1 or F2 and an additional resistor R1 or R2.
  • the fuses F1, F2 prevent a short circuit between the transformer taps.
  • the respective current is then passed through the resistors R1, R2 if the fuses F1 and / or F2 respond in the event of a fault.
  • the resistors R1, R2 are dimensioned so that in case of failure, the existing voltages remain limited so that in turn the mechanical contact system can end without switching the switch.
  • voltage sensors VS1, VS2 are still indicated in parallel in each branch and can serve to detect the respective electrical state in path A or B.
  • FIG. 5 shows a possible embodiment of the tap changer according to the invention, which is shown schematically in FIGS. 1 and 1a.
  • different, parallel to each other solid electrical contact paths are provided. All contact paths can be arranged both linearly and circularly, the tap changer can thus work translationally as well as rotationally with the same functional principle; the figure shows only the scheme.
  • the two winding taps A and B are again shown, which can be connected by the tap changer and form a first contact track.
  • a second contact track which is electrically connected to the input of the second semiconductor switching unit SCSb, as well as a third contact track, which is electrically connected to the input of the first semiconductor switching unit SCSa.
  • the other two sides, i. H. electrical outputs of the semiconductor switching units SCSa, SCSb are electrically connected together. They lead here to a fourth contact track.
  • a fifth contact track is a possible embodiment of the tap changer according to the invention.
  • Contact tracks is realized by jointly arranged on a movable contact carrier KT contact bridges K1 ... K4.
  • the contact bridge K4 corresponds to the respective main contact MCa or MCb shown in FIG. 1 or 1a; it connects the respective stationary state
  • the contact bridge K1 corresponds to the contact TCa and connects during the switching briefly the side A with the first semiconductor switching unit SCSa, as well connects the contact bridge K2, which corresponds to the contact TCb, the page B with the second semiconductor switching unit SCSb.
  • the direction of movement of the contact carrier KT is indicated by an arrow.
  • FIG. 6 once again shows the electronic assemblies shown on the right in FIG. 5 and later also in FIG. H.
  • Semiconductor switching units SCSa, SCSb in an enlarged view.
  • the four IGBTs T1 ... T4 are shown, two of them in each path in series against each other. Further, for each IGBT T1 ... T4, a diode D1 ... D4 is provided in parallel with the diodes (D1, D2; D3, D4) connected in opposition to each other; in turn, in each case, a varistor Varl ... Var4 is connected in parallel.
  • D1, D2; D3, D4 the diodes
  • Phase 1 Stationary operation at tap A.
  • the current flows through the closed contact MCa to the load lead LA.
  • the semiconductor switching units SCSa, SCSb remain switched off since all other mechanical switches are open.
  • Phase 2 switching on the electronics.
  • the mechanical contacts TCa, TCb and TC are turned on almost simultaneously.
  • the semiconductor switch SCS is thus over the
  • Step voltage supplied with electrical energy is the Step voltage supplied with electrical energy.
  • Phase 3 Switch on the semiconductor switching module SCSa. Since the electrical resistance of the mechanical contact group is low in comparison to that of the semiconductor devices and the other electronic components, the current is initially passed through the mechanical contact MCa.
  • Phase 4 Opening the main contact MCa. The current is thereby passed through the semiconductor switching unit SCSa.
  • Phase 5 The electronics switch over.
  • the semiconductor switching unit SCSa is turned off; the semiconductor switching unit SCSb is turned on and takes over the power supply.
  • Phase 6 The mechanical contact MCb of the other side B is switched on and now takes over the power supply.
  • Phase 7 Turn off the semiconductor switching unit SCSb. As soon as the mechanical contact MCb is closed, the electronics switch off the semiconductor switching unit SCSb of this branch.
  • Phase 8 Turn off all electronics.
  • the mechanical contacts TCa, TCb and TC are switched off almost simultaneously. All electronic components are disconnected from the power supply, ie the step voltage.
  • the load current is from Side B via the closed mechanical main contact MCb directly to
  • FIG. 7 shows a further, particularly advantageous device-specific embodiment of a tap-changer according to the invention.
  • winding taps here n, n + 1, n + 2, shown, which are electrically connected to elongated, thin pencil-like, fixed contact fingers KF1 ... KF3.
  • These contact fingers KF1 ... KF3 opposite each other, also trained elongate contact fingers AF1 ... AF3 are provided, which are conductively connected to each other and form the load dissipation LA.
  • Above the horizontal lying in a plane contact fingers KF1 ... KF3 and AF1 ... AF3 on both sides of a here indicated by dashes contact carrier KT is provided, which is movable perpendicular to the longitudinal extent of the contact fingers. The direction of movement is again symbolized by an arrow.
  • contact pieces are arranged, which are fixed on the contact carrier KT and are moved in a fixed geometric arrangement with each other with this.
  • this is the contact piece MC, which connects the respective winding tap directly in steady-state operation, which is shown in FIG. 7, to the opposite contact finger of the load lead LA.
  • two separate further contact pieces TCa and TCb are provided laterally and symmetrically arranged thereon.
  • the contact piece TCa is electrically connected to the input of the first semiconductor switching unit SCSa.
  • the second contact piece TCb is electrically connected to the input of the second semiconductor switching unit SCSb.
  • contact piece TC is provided, which is electrically connected to the output of the two semiconductor switching units SCSa, SCSb.
  • the explained further contact pieces - in addition to the contact piece MC - are geometrically arranged such that, depending on the switching direction, upon movement of the contact carrier KT, the contact piece TCa or TCb briefly one of
  • the contact piece TC on the other side is geometrically arranged such that it is switched during a switching, i. H. Actuation of the contact carrier KT, briefly making contact with one of the contact fingers AF1 ... AF3 of the load lead LA produces. In stationary operation, all these contacts TCa, TCb, TC are not switched; the electrical connection takes place directly from the respectively connected winding tap, here n + 1, to the load lead LA
  • the narrow in the direction of movement contacts designed as a contact finger
  • the wide in the direction of movement movable contacts designed as a contact piece

Landscapes

  • Electronic Switches (AREA)

Abstract

La présente invention concerne un commutateur à gradins comprenant des éléments de commutation à semi-conducteur, chacune de deux trajectoires de charge présentant un contact principal mécanique qui est traversé par un courant permanent et présentant une unité de commutation à semi-conducteur destinée à réaliser la commutation de charge réelle. L'invention a également pour objet des agencements structuraux particuliers d'un tel commutateur à gradins.
PCT/EP2010/007935 2010-02-24 2010-12-23 Commutateur à gradins Ceased WO2011103909A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010008972.9 2010-02-24
DE201010008972 DE102010008972A1 (de) 2010-02-24 2010-02-24 Stufenschalter

Publications (1)

Publication Number Publication Date
WO2011103909A1 true WO2011103909A1 (fr) 2011-09-01

Family

ID=43757881

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/007935 Ceased WO2011103909A1 (fr) 2010-02-24 2010-12-23 Commutateur à gradins

Country Status (2)

Country Link
DE (1) DE102010008972A1 (fr)
WO (1) WO2011103909A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013131581A1 (fr) * 2012-03-09 2013-09-12 Siemens Aktiengesellschaft Dispositif de commutation d'un courant continu dans un pôle d'un réseau de tension continue

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD40772A1 (de) * 1964-03-18 1965-08-25 Lastumschalter für Transformatoren und Drosselspulen
WO1997005536A1 (fr) 1995-08-01 1997-02-13 N.V. Eneco Procede et dispositif de reglage et de regulation continus du rapport de spires d'un transformateur et transformateur pourvu d'un tel dispositif
WO2001022447A1 (fr) 1999-09-20 2001-03-29 Abb Ab Dispositif de commutation electrique, procede de controle du dispositif et utilisation du dispositif
WO2010022751A1 (fr) * 2008-08-27 2010-03-04 Maschinenfabrik Reinhausen Gmbh Procédé de commutation sans interruption entre des prises de bobinage d'un transformateur à gradins

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD40772A1 (de) * 1964-03-18 1965-08-25 Lastumschalter für Transformatoren und Drosselspulen
WO1997005536A1 (fr) 1995-08-01 1997-02-13 N.V. Eneco Procede et dispositif de reglage et de regulation continus du rapport de spires d'un transformateur et transformateur pourvu d'un tel dispositif
WO2001022447A1 (fr) 1999-09-20 2001-03-29 Abb Ab Dispositif de commutation electrique, procede de controle du dispositif et utilisation du dispositif
WO2010022751A1 (fr) * 2008-08-27 2010-03-04 Maschinenfabrik Reinhausen Gmbh Procédé de commutation sans interruption entre des prises de bobinage d'un transformateur à gradins

Also Published As

Publication number Publication date
DE102010008972A1 (de) 2011-08-25

Similar Documents

Publication Publication Date Title
DE102010008973B4 (de) Stufenschalter des Hybridtyps mit Halbleiterschaltelementen
EP0375687B1 (fr) Commutateur de reglage en charge a thyristors
EP2417613B1 (fr) Sélecteur en charge à commutation avec éléments semi-conducteurs
DE102012107446B4 (de) Lastumschalter, Laststufenschalter und Verfahren zum Umschalten eines Laststufenschalters
EP2524385B1 (fr) Procédé de mesure du temps de commutation sur un commutateur à gradins en charge et circuit de mesure du temps de commutation
WO2016169826A1 (fr) Commutateur en charge, procédé d'actionnement d'un commutateur en charge et installation électrique comprenant un commutateur en charge
DE102018119163A1 (de) Laststufenschalter zur unterbrechungslosen umschaltung zwischen wicklungsanzapfungen eines stufentransformators sowie stufentransformator
DE102011010388A1 (de) Stufenschalter
EP4173012B1 (fr) Changeur de prises en charge et méthode de fonctionnement d'un tel changeur de prises en charge
EP2638553A1 (fr) Commutateur à gradins
WO2015176918A1 (fr) Dispositif de commutation pour transformateur à gradins et procédé permettant de faire fonctionner un dispositif de commutation de ce type
DE102019115970A1 (de) Laststufenschalter
WO2011103907A1 (fr) Commutateur à gradins
EP3050067B1 (fr) Changeur de prises
EP1593574B1 (fr) Système de commande d'aiguillages d'un poste d'aiguillage électronique
WO2011103909A1 (fr) Commutateur à gradins
DE10344142B3 (de) Laststufenschalter mit Motorantrieb
DE102018113982B4 (de) Laststufenschalter und verfahren zur betätigung eines laststufenschalters
EP0124904A2 (fr) Commutateur à gradins
EP4226403B1 (fr) Changeur de prises en charge et procédé pour actionner un changeur de prises en charge
EP4200886B1 (fr) Changeur de prises en charge et procédé pour actionner un changeur de prises en charge
DE2255830A1 (de) Schaltungsanordnung zum unterbrechungslosen lastumschalten bei stufentransformatoren
DE102020132772A1 (de) Laststufenschalter
DE2056234A1 (de) Stufenregeleinrichtung fur Transfor matoren und Drosselspulen
DE1208659B (de) Schaltungsanordnung zur UEberwachung von einander ausschliessenden Signalzustaenden fuer Strassenverkehrssignalanlagen

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10801143

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 10801143

Country of ref document: EP

Kind code of ref document: A1