EP0424632A1 - Device and method for switching on-load tap changers - Google Patents

Device and method for switching on-load tap changers Download PDF

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Publication number
EP0424632A1
EP0424632A1 EP90116312A EP90116312A EP0424632A1 EP 0424632 A1 EP0424632 A1 EP 0424632A1 EP 90116312 A EP90116312 A EP 90116312A EP 90116312 A EP90116312 A EP 90116312A EP 0424632 A1 EP0424632 A1 EP 0424632A1
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EP
European Patent Office
Prior art keywords
switching
current
load
contacts
load branch
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.)
Granted
Application number
EP90116312A
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German (de)
French (fr)
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EP0424632B1 (en
Inventor
Alexander Bleibtreu
Josef Neumeyer
Hans-Henning Dipl.-Ing. Lessmann-Mieske
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Priority to AT90116312T priority Critical patent/ATE103102T1/en
Publication of EP0424632A1 publication Critical patent/EP0424632A1/en
Application granted granted Critical
Publication of EP0424632B1 publication Critical patent/EP0424632B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current

Definitions

  • the invention relates to an arrangement for load switching according to the preamble of claim 1, and to an associated method.
  • Such a switching arrangement is known from DE-C 25 20 670.
  • both switching contacts can act as a main or resistance switching contact depending on the switching direction and thus the contact erosion progresses evenly with both switching contacts, regardless of whether the corresponding transformer to be switched often with the full load current, which leads to excessive erosion of the Main switch contact leads, or at idle, with a very low load current with a correspondingly low erosion of this contact.
  • a disadvantage of the known circuit is that the single-pole changeover switch, which, depending on the direction of rotation of the drive, matches the function of the switching contacts as the main or resistance switching contact. switches the entire load current that leads to load dissipation.
  • the object of the invention is to change the known switching arrangement so that only a minimum of switching movements from the energy accumulator must be carried out in the shortest possible time and in rapid succession; the other switching operations should be possible without current and thus be able to take place before or after its dissolution, regardless of the energy accumulator.
  • the step transformer to be switched is provided with tap steps 1, 2, 3; in the arrangement shown in FIG. 1, the two load branches, each of which has two switching contacts lying in series, are located between two tap stages 2, 3, on the one hand the contact 4.1 in series with the contact 7, on the other hand the contact 4.2 in series with the contact 6. In this parallel connection, a continuous current contact 8, 9 is connected in parallel.
  • a switching resistor 5 is arranged between the contacts of each load branch.
  • the two contacts 4.1, 4.2 of each load branch, each facing the tap selector, are designed as a common double-pole changeover switch 4; the other two contacts 6, 7 of the load conductor facing each load branch are power switching contacts which are mechanically coupled to the continuous current contacts 8, 9.
  • Steps i) to p) show a further, analogous switching step back to the starting position.
  • FIG. 3 Another exemplary arrangement for load switching is shown in FIG. 3.
  • the two individually operable continuous current contacts 8, 9 are replaced by a single changeover contact, which connects the contacts 8, 9 facing the tap stages 2, 3 in each load branch, acting as a bypass with the load lead 10.
  • the continuous current contact designed as a changeover contact is mechanically coupled to the other contacts in such a way that the same process sequence results.
  • FIG. 4 again shows the corresponding switching sequence when switching to another tap level (steps a - h) and back again (steps i - p).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Slide Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

A device for switching on-load tap changers, two series switching contacts being arranged in each load path in such a manner that the switching contacts located on the side of the tap changer are constructed as double-pole changeover switches, the changeover contact allocated to the live load path always being closed in the quiescent state. The other contacts are constructed as power switching contacts; they and the additional continuous current contacts are mechanically positively controlled. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Anordnung zur Lastumschaltung gemäß dem Oberbegriff des 1. Patentanspruches, sowie auf ein zugehöriges Verfahren.The invention relates to an arrangement for load switching according to the preamble of claim 1, and to an associated method.

Eine solche Umschaltanordnung ist aus DE-C 25 20 670 bekannt.Such a switching arrangement is known from DE-C 25 20 670.

Sie hat den Vorteil, daß beide Schaltkontakte in Abhängigkeit von der Schaltrichtung als Haupt- oder Widerstandsschaltkontakt wirken können und dadurch der Kontaktabbrand bei beiden Schaltkontakten gleichmäßig fortschreitet, unabhängig davon, ob der entsprechende zu schaltende Transformator häufig mit dem vollen Laststrom, was zu starkem Abbrand des Hauptschalt­kontaktes führt, oder bei Leerlauf, mit einem sehr geringen Laststrom mit entsprechend geringem Abbrand dieses Kontaktes, beansprucht wird. Nachteilig an der bekannten Schaltung ist, daß der einpolige Umschalter, der in Abhängigkeit von der Drehrichtung des Antriebes die Funktionszuordnung der Schaltkontakte als Haupt- oder Widerstandsschaltkontakt trifft. den gesamten Laststrom, der zur Lastableitung führt, schaltet.It has the advantage that both switching contacts can act as a main or resistance switching contact depending on the switching direction and thus the contact erosion progresses evenly with both switching contacts, regardless of whether the corresponding transformer to be switched often with the full load current, which leads to excessive erosion of the Main switch contact leads, or at idle, with a very low load current with a correspondingly low erosion of this contact. A disadvantage of the known circuit is that the single-pole changeover switch, which, depending on the direction of rotation of the drive, matches the function of the switching contacts as the main or resistance switching contact. switches the entire load current that leads to load dissipation.

Daher ist es erforderlich, daß dieser Schaltvorgang möglichst schnell erfolgt, weswegen auch bei der bekannten Umschalt­anordnung der Umschalter zeitlich vor den Schaltkontakten vom Kraftspeicherantrieb bewegt wird. Dies bedeutet jedoch, daß einerseits ein Teil der im Kraftspeicher vorhandenen Energie bereits für die Betätigung des Umschalters aufgewandt werden muß und somit für eine sichere Betätigung der eigentlichen Schaltkontakte nicht mehr zur Verfügung steht und andererseits sich die Gesamtschaltzeit von einer Stufe zur anderen, für die der Kraftspeicher ausgelegt sein muß, um die Schaltzeit des Umschalters verlängert, die zur Schaltzeit der nacheinander betätigten Haupt- bzw. Widerstandskontakte hinzukommt.It is therefore necessary for this switching operation to take place as quickly as possible, which is why, in the known switching arrangement, the changeover switch is moved in time by the energy storage drive before the switching contacts. However, this means that, on the one hand, part of the energy present in the energy store must already be used to actuate the switch and is therefore no longer available for safe actuation of the actual switch contacts, and on the other hand the total switching time from one stage to the other, for which the energy accumulator must be designed, is extended by the switching time of the changeover switch, which is added to the switching time of the successively actuated main or resistance contacts.

Zusammenfassend betrachtet, müssen demnach zahlreiche Schalt­handlungen in möglichst rascher Folge ablaufen; dieser Ablauf, d.h. die Kontaktbetätigungen, stellen hohe Anforderungen an den Kraftspeicher, verkomplizieren dessen Aufbau und erhöhen die Störanfälligkeit und Fehlerhäufigkeit des gesamten Lastschalters.In summary, numerous switching operations must take place in the fastest possible sequence; this process, i.e. the contact actuations place high demands on the energy accumulator, complicate its construction and increase the susceptibility to faults and the frequency of errors of the entire circuit breaker.

Aufgabe der Erfindung ist es, die bekannte Umschaltanordnung so zu verändern, daß nur ein Minimum an Schaltbewegungen vom Kraftspeicher in möglichst kurzer Zeit und rascher Folge ausgeführt werden muß; die übrigen Schalthandlungen sollen stromlos möglich sein und damit unabhängig vom Kraftspeicher vor oder nach dessen Auflösung erfolgen können.The object of the invention is to change the known switching arrangement so that only a minimum of switching movements from the energy accumulator must be carried out in the shortest possible time and in rapid succession; the other switching operations should be possible without current and thus be able to take place before or after its dissolution, regardless of the energy accumulator.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen der Ansprüche 1 und 2 angegebenen Mittel bzw. Verfahrens­schritte gelöst.This object is achieved according to the invention by the means or method steps indicated in the characterizing part of claims 1 and 2.

Die Erfindung soll nachstehend an Ausführungsbeispielen näher erläutert werden.

  • Fig. 1 zeigt eine erste beispielhafte Anordnung zur Lastumschaltung
  • Fig. 2 zeigt den dazugehörigen Schaltablauf
  • Fig. 3 zeigt eine zweite beispielhafte Anordnung zur Leistungsumschaltung
  • Fig. 4 zeigt wiederum den dazugehörigen Schaltablauf.
The invention will be explained in more detail below using exemplary embodiments.
  • Fig. 1 shows a first exemplary arrangement for load switching
  • Fig. 2 shows the associated switching sequence
  • Fig. 3 shows a second exemplary arrangement for power switching
  • Fig. 4 again shows the associated switching sequence.

Der zu schaltende Stufentransformator ist mit Anzapfstufen 1, 2, 3 versehen; zwischen zwei Anzapfstufen 2, 3 befinden sich bei der in Fig. 1 dargestellten Anordnung die beiden Lastzweige, die jeweils zwei in Reihe liegende Schaltkontakte aufweisen, einerseits der Kontakt 4.1 in Reihe mit dem Kontakt 7, andererseits der Kontakt 4.2 in Reihe mit dem Kontakt 6. In dieser Parallelschaltung ist jeweils ein Dauerstromkontakt 8, 9 parallelgeschaltet.The step transformer to be switched is provided with tap steps 1, 2, 3; in the arrangement shown in FIG. 1, the two load branches, each of which has two switching contacts lying in series, are located between two tap stages 2, 3, on the one hand the contact 4.1 in series with the contact 7, on the other hand the contact 4.2 in series with the contact 6. In this parallel connection, a continuous current contact 8, 9 is connected in parallel.

Zwischen den Kontakten jedes Lastzweiges ist ein Überschalt­widerstand 5 angeordnet.A switching resistor 5 is arranged between the contacts of each load branch.

Die beiden jeweils dem Stufenwähler zugewandten Kontakte 4.1, 4.2 jedes Lastzweiges sind als gemeinsamer doppelpoliger Umschalter 4 ausgebildet; bei den anderen beiden, der Lastableitung 10 zugewandten Kontakten 6, 7 jedes Lastzweiges handelt es sich um Leistungsschaltkontakte, die mechanisch mit den Dauerstromkontakten 8, 9 gekoppelt sind.The two contacts 4.1, 4.2 of each load branch, each facing the tap selector, are designed as a common double-pole changeover switch 4; the other two contacts 6, 7 of the load conductor facing each load branch are power switching contacts which are mechanically coupled to the continuous current contacts 8, 9.

In Fig. 2 ist das Verfahren zur Lastumschaltung unter Verwendung der in Fig. 1 dargestellten Anordnung gezeigt:

  • a) der Dauerstromkontakt 9 ist geschlossen, der Strom fließt über ihn von der Anzapfstufe 3 zur Ableitung 10
  • b) der Leistungsschaltkontakt 7 des stromführenden Lastzweiges schließt, der Strom fließt sowohl über 9 als auch über 7
  • c) der Dauerstromkontakt 9 öffnet, der Strom fließt ausschließlich über 7
  • d) der Leistungsschaltkontakt 6 des mit der Anzapfstufe 2, auf die umgeschaltet werden soll, verbundenen Lastzweiges schließt
  • e) der Leistungsschaltkontakt 7 öffnet; der Strom fließt über 4.1, den Überschaltwiderstand 5 und 8
  • f) der Dauerstromkontakt 8 schließt; der Strom fließt von der Anzapfstufe 2 über 8 zur Ableitung 10, gleichzeitig fließt ein Ausgleichsstrom von der Anzapfstufe 3 über 4.1 und den Überschaltwiderstand 5 sowie 6
  • g) der Leistungsschaltkontakt 6 öffnet; der Strom fließt ausschließlich von der Anzapfstufe 2 über 8 zur Lastableitung 10
  • h) der doppelpolige Umschalter 4 wechselt, d.h. Schalter 4.1 wird geöffnet und Schalter 4.2 wird geschlossen. Die Umschaltung ist beendet.
FIG. 2 shows the method for load switching using the arrangement shown in FIG. 1:
  • a) the permanent current contact 9 is closed, the current flows through it from the tap 3 to the derivative 10
  • b) the power switch contact 7 of the current-carrying load branch closes, the current flows both via 9 and via 7
  • c) the permanent current contact 9 opens, the current flows exclusively via 7
  • d) the power switching contact 6 of the load branch connected to the tap stage 2 to which the switch is to be made closes
  • e) the power switch contact 7 opens; the current flows over 4.1, the contact resistance 5 and 8
  • f) the continuous current contact 8 closes; the current flows from tap stage 2 via 8 to discharge line 10, at the same time a compensating current flows from tap stage 3 via 4.1 and the contact resistance 5 and 6
  • g) the power switch contact 6 opens; the current flows exclusively from tap stage 2 via 8 to load conductor 10
  • h) the double-pole changeover switch 4 changes, ie switch 4.1 is opened and switch 4.2 is closed. The switchover is complete.

Die Schritte i) bis p) zeigen einen weiteren, analog ablaufenden Schaltschritt zurück in die Ausgangsposition.Steps i) to p) show a further, analogous switching step back to the starting position.

In der Fig. 3 ist eine andere beispielhafte Anordnung zur Lastumschaltung gezeigt.Another exemplary arrangement for load switching is shown in FIG. 3.

Hierbei sind die beiden einzeln betätigbaren Dauerstromkontakte 8, 9 durch einen einzigen Umschaltkontakt ersetzt, der die in jedem Lastzweig den Anzapfstufen 2, 3 zugewandten Kontakte 8, 9 direkt als Bypass wirkend mit der Lastableitung 10 verbindet. Bei dieser Ausführungsform ist der als Umschalt­kontakt ausgebildete Dauerstromkontakt mechanisch so mit den anderen Kontakten gekoppelt, daß sich der gleiche Verfahrens­ablauf ergibt.Here, the two individually operable continuous current contacts 8, 9 are replaced by a single changeover contact, which connects the contacts 8, 9 facing the tap stages 2, 3 in each load branch, acting as a bypass with the load lead 10. In this embodiment, the continuous current contact designed as a changeover contact is mechanically coupled to the other contacts in such a way that the same process sequence results.

Fig. 4 zeigt wiederum den entsprechenden Schaltablauf beim Schalten auf eine andere Anzapfstufe (Schritte a - h) und wieder zurück (Schritte i - p).FIG. 4 again shows the corresponding switching sequence when switching to another tap level (steps a - h) and back again (steps i - p).

Bei beiden Schaltungsvarianten ist aus den Schaltabläufen ersichtlich, daß lediglich die Leistungsschaltkontakte 6, 7 zur raschen Lichtbogenlöschung möglichst schnell durch den Federkraftspeicher betätigt werden müssen. Sowohl beim doppelpoligen Umschalter 4 als auch bei den Dauerstromkontakten 8, 9 bzw. dem Dauerstromkontakt hingegen ist die Schaltge­schwindigkeit unkritisch, so sie in jedem Fall leistungsfrei geschaltet werden.In both circuit variants, it can be seen from the switching sequences that only the power switching contacts 6, 7 have to be actuated as quickly as possible by the spring force accumulator in order to extinguish the arc quickly. In the case of the double-pole changeover switch 4 as well as in the case of the continuous current contacts 8, 9 or the continuous current contact, however, the switching speed is not critical, so that they are switched in a power-free manner in any case.

Claims (2)

1. Anordnung zur Lastumschaltung für Lastschalter von Stufenschaltern für Stufentransformatoren, die die Umschaltung von einem zunächst stromführenden Lastzweig auf einen stromübernehmenden Lastzweig gestattet, wobei beide Lastzweige mittels eines Stufenwählers an je eine Anzapfstufe des Stufentransformators geschaltet sind und wobei jeder Lastzweig zwei in Reihe liegende Schaltkontakte aufweist, zu denen ein für die Dauerstrom­führung bestimmter Dauerstromkontakt parallelgeschaltet ist und wobei ein jeweils an die Verbindungsstelle der beiden Schaltkontakte jedes Lastzweiges angeschlossener beim Umschaltvorgang kurzzeitig einschaltbarer Überschalt­widerstand zwischen den beiden Lastzweigen liegt,
dadurch gekennzeichnet,
daß die beiden auf der Seite des Stufenwählers liegenden Schaltkontakte als doppelpoliger Umschalter ausgebildet sind, wobei im Ruhezustand stets der dem stromführenden Lastzweig zugeordnete Umschaltkontakt geschlossen ist und daß die beiden anderen auf der Seite der Lastableitung liegenden Schaltkontakte als Leistungsschaltkontakte ausgebildet sind, wobei diese Leistungsschaltkontakte und die beiden Dauerstromkontakte als mechanisch zwangsgesteuerte Kontakte ausgebildet sind, derart, daß in der Ruhestellung lediglich der Dauerstromkontakt des stromführenden Lastzweiges geschlossen ist.1. Arrangement for load switching for load switches of tap changers for step transformers, which allows switching from an initially live load branch to a current-carrying load branch, whereby both load branches are connected to a tap of the step transformer by means of a step selector and each load branch has two switching contacts in series , to which a continuous current contact intended for continuous current routing is connected in parallel, and a switching resistor which can be briefly switched on during the switching process is connected between the two load branches and is connected to the connection point of the two switching contacts of each load branch,
characterized,
that the two switch contacts on the side of the tap selector are designed as double-pole changeover switches, the switch contact assigned to the current-carrying load branch is always closed in the idle state and that the other two switch contacts on the side of the load dissipation are designed as power switch contacts, these power switch contacts and the Both continuous current contacts are designed as mechanically positively controlled contacts, such that only the continuous current contact of the current-carrying load branch is closed in the rest position. 2. Verfahren zur Lastumschaltung unter Verwendung der Anordnung nach Anspruch 1,
gekennzeichnet durch nachstehende Schaltfolge beim Umschaltvorgang von einem stromführenden Lastzweig auf einen stromübernehmenden Lastzweig: I. Der Leistungsschaltkontakt des stromführenden Lastzweiges schließt II. Der Dauerstromkontakt des stromführenden Lastzweiges öffnet III. Der Leistungsschaltkontakt des stromüber­nehmenden Lastzweiges schließt IV. Der Leistungsschaltkontakt des stromführenden Lastzweiges öffnet V. Der Dauerstromkontakt des stromübernehmenden Lastzweiges schließt VI. Der Leistungsschaltkontakt des stromübernehmenden Lastzweiges öffnet VII. Der doppelpolige Umschalter wechselt. 2. A method for load switching using the arrangement according to claim 1,
characterized by the following switching sequence when switching from a current-carrying load branch to a current-accepting load branch: I. The power switch contact of the live load branch closes II. The continuous current contact of the live load branch opens III. The power switch contact of the current-carrying load branch closes IV. The power switch contact of the live load branch opens V. The continuous current contact of the current-carrying load branch closes VI. The power switching contact of the current-carrying load branch opens VII. The double-pole switch changes.
EP90116312A 1989-10-27 1990-08-25 Device and method for switching on-load tap changers Expired - Lifetime EP0424632B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90116312T ATE103102T1 (en) 1989-10-27 1990-08-25 ARRANGEMENT AND METHOD OF LOAD SWITCHING FOR LOAD SWITCHES OF TAP SWITCHES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3935866 1989-10-27
DE3935866A DE3935866A1 (en) 1989-10-27 1989-10-27 ARRANGEMENT AND METHOD FOR LOAD SWITCHING FOR LOAD SWITCHES OF TAPE SWITCHES

Publications (2)

Publication Number Publication Date
EP0424632A1 true EP0424632A1 (en) 1991-05-02
EP0424632B1 EP0424632B1 (en) 1994-03-16

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EP90116312A Expired - Lifetime EP0424632B1 (en) 1989-10-27 1990-08-25 Device and method for switching on-load tap changers

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EP (1) EP0424632B1 (en)
JP (1) JPH0463411A (en)
AT (1) ATE103102T1 (en)
BG (1) BG50840A3 (en)
DE (2) DE3935866A1 (en)
ES (1) ES2049878T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6272465B1 (en) * 1994-11-02 2001-08-07 Legerity, Inc. Monolithic PC audio circuit
US6246774B1 (en) 1994-11-02 2001-06-12 Advanced Micro Devices, Inc. Wavetable audio synthesizer with multiple volume components and two modes of stereo positioning

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520670C3 (en) * 1975-05-09 1979-10-25 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg Switching arrangement for diverter switches from step switches for step transformers
EP0116748A1 (en) * 1983-01-07 1984-08-29 Mitsubishi Denki Kabushiki Kaisha On-load tap changer
DE3322497A1 (en) * 1983-06-22 1985-01-10 Transformatoren Union Ag, 7000 Stuttgart Circuit arrangement for devices for setting the voltage under load on transformers and inductor coils

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT400496B (en) * 1987-06-25 1996-01-25 Elin Oltc Gmbh Stufenschalter THYRISTOR LOAD SWITCH

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520670C3 (en) * 1975-05-09 1979-10-25 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg Switching arrangement for diverter switches from step switches for step transformers
EP0116748A1 (en) * 1983-01-07 1984-08-29 Mitsubishi Denki Kabushiki Kaisha On-load tap changer
DE3322497A1 (en) * 1983-06-22 1985-01-10 Transformatoren Union Ag, 7000 Stuttgart Circuit arrangement for devices for setting the voltage under load on transformers and inductor coils

Also Published As

Publication number Publication date
ATE103102T1 (en) 1994-04-15
ES2049878T3 (en) 1994-05-01
BG50840A3 (en) 1992-11-16
DE3935866A1 (en) 1991-05-02
EP0424632B1 (en) 1994-03-16
JPH0463411A (en) 1992-02-28
DE59005004D1 (en) 1994-04-21

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