EP1465221A1 - Arrangement for monitoring a tap changer - Google Patents

Arrangement for monitoring a tap changer Download PDF

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Publication number
EP1465221A1
EP1465221A1 EP04003100A EP04003100A EP1465221A1 EP 1465221 A1 EP1465221 A1 EP 1465221A1 EP 04003100 A EP04003100 A EP 04003100A EP 04003100 A EP04003100 A EP 04003100A EP 1465221 A1 EP1465221 A1 EP 1465221A1
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EP
European Patent Office
Prior art keywords
monitoring
sensor
tap changer
aow
arrangement
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EP04003100A
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German (de)
French (fr)
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EP1465221B1 (en
Inventor
Dieter Dr. Dohnal
Karsten Dr. Viereck
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Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
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Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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Publication of EP1465221A1 publication Critical patent/EP1465221A1/en
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    • 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
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication
    • 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
    • H01H2009/0061—Monitoring tap change switching devices

Definitions

  • the invention relates to a monitoring system for tap changers, in which the load switching in each phase to be switched is carried out by means of at least one vacuum interrupter.
  • Vacuum interrupters For tap changers where instead of conventional mechanical contacts for load switching Vacuum interrupters can be used in a monitoring and security system Analogy to monitoring mechanical contacts under oil - in many cases it makes sense that ensures that in the event of a fault, if one vacuum interrupter when switching to another Level does not open in time or does not open at all and the tapping change is therefore not without performance an operation becomes impossible. In such a case, a non-opening Vacuum interrupter there is strong arcing on the mechanical contacts, what leads to increased burn-off on these contacts. Frequent switching under an arc This can lead to faults at the tap changer, but in any case to a critical one Operating condition that should be avoided.
  • each vacuum interrupter is in the power supply one current transformer each, which has an output voltage for one transmitting diode (LED) of an optical fiber.
  • the current transformers report via the respective optical fibers, at the end of which there are light receivers, whether there is a current flow in the respective branch or not. Certain inspection times are provided for this. So at the time of Sequence of movements each time the tap changer is operated, in which the vacuum interrupters are straight have opened, but the inefficient movement of the level selector has not yet started Status of the vacuum interrupter checked. At this point occurs in one of the phases to be switched a current flow indicates a defective - because not open - vacuum interrupter, and a phase-related error message is generated.
  • the object of the invention is therefore to overcome the disadvantages of the known monitoring system avoid and to specify such a generic system that a non-contact External vacuum interrupters can be monitored.
  • the surface acoustic wave used in this invention (A kustician O bermati w Ellen-) sensors, as a SAW (S urface A Custic W ave) sensors referred to, are known per se. So far, however, no suggestion has been made or no attempt has been made to use them on tap changers in a suitable manner.
  • Known AOW sensors usually consist of a LiNbO 3 substrate, which is arranged in a metal or ceramic housing, as is used for integrated circuits. Such a sensor can be read wirelessly via radio; the propagation losses to the AOW sensor are extremely low and the sensor does not require any energy supply for signal processing. In addition to the actual AOW sensor located at the measurement location, a query unit is required for radio polling.
  • High-frequency pulses in the frequency range between 100 MHz and 3 GHz are emitted by an oscillator of this interrogation unit via an antenna.
  • On the AOW sensor itself there is an interdigital transducer connected to an antenna and in many cases several reflectors.
  • the interdigital transducer usually in the form of a comb, is excited by the received high-frequency electromagnetic pulse, and an acoustic surface wave is generated via the piezoelectric effect. This surface wave is partially reflected at the reflectors, so that it reaches the interdigital transducer again. There it is converted back and emitted via the antenna of the AOW sensor and can be received by the interrogation unit.
  • the pulse sequence emitted by the AOW sensor which is received by the interrogation unit, initially contains, as information, a specific, specific bit pattern of the sensor which is used to identify it.
  • a single interrogation unit can therefore receive the information from a large number of different AOW sensors and assign it to the individual sensors.
  • a change in a relevant physical quantity on the sensor leads to a change in the speed of the described surface wave propagating on the sensor or also to a change in the geometric spacing of the reflectors. This results in a change in the pulse duration, which is recorded and evaluated in the interrogation device and which allows conclusions to be drawn about the corresponding physical variable or its change in the environment of the respective AOW sensor.
  • Such an AOW sensor is described in detail in WO 96/33423 from SIEMENS AG.
  • Such AOW sensor is also already known from WO 96/33417 by the same applicant for current measurement on electrical devices connected to high voltage use.
  • this type of current transformer application there is a magneto-sensitive element provided that is coupled to the surface wave structures.
  • One known per se Arrangement can be particularly advantageous for a monitoring device according to the invention be used.
  • the figure shows the schematic structure of a monitoring device according to the invention.
  • the upper area indicates the oil tank 1 of a tap changer in which there are three Vacuum interrupters V1 ... V3 are located - for each phase U, V, W there is one in this example Vacuum interrupter provided.
  • the invention is not limited to such an arrangement; the monitoring device according to the invention is suitable for any electrical circuit of tap changers with any number of such vacuum interrupters per phase. It should the status of the vacuum interrupters V1 ... V3 is checked at certain times, d. H. determine whether they are actually open. If this is not the case in the event of an error, flows in the corresponding branch a stream.
  • an AOW sensor S1 ... S3 provided outside of the oil tank 1 of the Step switch.
  • an interrogation unit 2 which has an oscillator and an antenna.
  • the oscillator emits high-frequency pulses via the antenna to the AOW sensors S1 ... S3.
  • There they generate a surface acoustic wave in a manner known per se which, after they has been reflected by the reflectors within the respective sensor, emitted back again and is received by the interrogation unit 2.
  • the one sent by the query unit 2 high-frequency radiation is indicated by a dashed line.
  • S3 radiation transmitted back is represented by dotted lines; the different Puncturing is intended to indicate the specific bit pattern that query unit 2 has Sensor-specific assignment allowed.
  • This changed pulse transit time of the signal emitted by the corresponding sensor is from the Interrogation unit 2 is recorded, assigned to the respective sensor as error information and as information given to the monitoring unit 3 known from the prior art.
  • the interrogation unit 2 and the monitoring unit 3 can rather be outside the tap changer 1, for example, in the area of the motor drive or elsewhere.

Abstract

A radio interrogatable surface acoustic wave sensor (S1,...S3) is provided for each phase of the switch, near to the respective vacuum switching tubes (V1,...V3). An interrogating device (2) is provided outside the multistage switch, and emits and receives high frequency radiation. The interrogating unit is electrically connected to a monitoring unit (3).

Description

Die Erfindung betrifft ein Überwachungssystem für Stufenschalter, bei denen die Lastumschaltung in jeder zu schaltenden Phase mittels mindestens einer Vakuumschaltröhre erfolgt.The invention relates to a monitoring system for tap changers, in which the load switching in each phase to be switched is carried out by means of at least one vacuum interrupter.

Eine solche Anordnung ist aus der DE 40 09 038 A1 bereits bekannt.Such an arrangement is already known from DE 40 09 038 A1.

Bei Stufenschaltern, bei denen statt herkömmlicher mechanischer Kontakte zur Lastumschaltung Vakuumschaltröhren Anwendung finden, kann ein Überwachungs- und Sicherheitssystem - in Analogie zur Überwachung mechanischer Kontakte unter Öl - in vielen Fällen sinnvoll sein, das gewährleistet, dass im Fehlerfall, wenn eine Vakuumschaltröhre beim Umschalten auf eine andere Stufe nicht rechtzeitig bzw. gar nicht öffnet und der Wechsel der Anzapfungen damit nicht leistungslos erfolgen kann, eine Betätigung unmöglich wird. In einem solchen Fall einer nicht öffnenden Vakuumschaltröhre kommt es zu starker Lichtbogenbildung an den mechanischen Kontakten, was erhöhten Abbrand an diesen Kontakten zur Folge hat. Beim oftmaligen Schalten unter Lichtbogen kann es in der Folge zu Störungen am Stufenschalter, auf alle Fälle jedoch zu einem kritischen Betriebszustand kommen, der vermieden werden sollte.For tap changers where instead of conventional mechanical contacts for load switching Vacuum interrupters can be used in a monitoring and security system Analogy to monitoring mechanical contacts under oil - in many cases it makes sense that ensures that in the event of a fault, if one vacuum interrupter when switching to another Level does not open in time or does not open at all and the tapping change is therefore not without performance an operation becomes impossible. In such a case, a non-opening Vacuum interrupter there is strong arcing on the mechanical contacts, what leads to increased burn-off on these contacts. Frequent switching under an arc This can lead to faults at the tap changer, but in any case to a critical one Operating condition that should be avoided.

Die erwähnte DE 40 09 038 A1 beschreibt ein solches Überwachungssystem, das als "Monitoringsystem" bekannt geworden ist, für Stufenschalter des Reaktorschalter-Typs.The aforementioned DE 40 09 038 A1 describes such a monitoring system, which as "Monitoring system" has become known for tap changers of the reactor switch type.

Bei diesem bekannten Überwachungssystem ist in der Stromzuführung jeder Vakuumschaltröhre jeweils ein Stromwandler angeordnet, der eine Ausgangsspannung für jeweils eine Sendediode (LED) eines Lichtwellenleiters liefert. Die Stromwandler melden dabei über die jeweiligen Lichtwellenleiter, an deren Ende sich Lichtempfänger befinden, ob im jeweiligen Zweig ein Stromfluss vorhanden ist oder nicht. Dafür sind bestimmte Kontrollzeitpunkte vorgesehen. So wird in dem Zeitpunkt des Bewegungsablaufes bei jeder Betätigung des Stufenschalters, in dem die Vakuumschaltröhren gerade geöffnet haben, jedoch die leistungslose Bewegung des Stufenwählers noch nicht begonnen hat, der Status der Vakuumschaltröhre geprüft. Tritt zu diesem Zeitpunkt in einer der zu schaltenden Phasen ein Stromfluss auf, deutet dies auf eine defekte - weil nicht geöffnete - Vakuumschaltröhre hin, und es wird eine phasenbezogene Fehlermeldung generiert.In this known monitoring system, each vacuum interrupter is in the power supply one current transformer each, which has an output voltage for one transmitting diode (LED) of an optical fiber. The current transformers report via the respective optical fibers, at the end of which there are light receivers, whether there is a current flow in the respective branch or not. Certain inspection times are provided for this. So at the time of Sequence of movements each time the tap changer is operated, in which the vacuum interrupters are straight have opened, but the inefficient movement of the level selector has not yet started Status of the vacuum interrupter checked. At this point occurs in one of the phases to be switched a current flow indicates a defective - because not open - vacuum interrupter, and a phase-related error message is generated.

Dieses Überwachungssystem hat sich bewährt und ist seit vielen Jahren bei den von der Reinhausen Manufacturing Inc., USA hergestellten Stufenschaltern vom Typ "RMV" im Einsatz. Ein gewisser Nachteil dieses Systems besteht jedoch darin, dass die beschriebene Statusinformation über die jeweils zu überwachende Vakuumschaltröhre, die mittels Stromwandlern erfolgt, über jeweils einen Lichtwellenleiter nach außen geführt werden muss. Die beschriebenen Lichtwellenleiter müssen also durch das ölgefüllte Innere des Stufenschalters geführt werden, was nicht nur die dielektrische Spannungsfestigkeit mindert, sondern auch spezielle Abdichtungen erfordert.This monitoring system has proven itself and has been with von der Reinhausen for many years Manufacturing Inc., USA manufactured "RMV" type tap changers in use. Someone specific The disadvantage of this system, however, is that the status information described about the Each vacuum interrupter to be monitored, which is carried out by means of current transformers, via one Optical fiber must be led outside. The optical fibers described must therefore through the oil-filled interior of the tap changer, which is not only the dielectric Dielectric strength decreases, but also requires special seals.

Aufgabe der Erfindung ist es demnach, die Nachteile des bekannten Überwachungssystemes zu vermeiden und ein solches gattungsgemäßes System anzugeben, das eine berührungslose Überwachung der jeweiligen Vakuumschaltröhre von außen gestattet.The object of the invention is therefore to overcome the disadvantages of the known monitoring system avoid and to specify such a generic system that a non-contact External vacuum interrupters can be monitored.

Diese Aufgabe wird durch ein Überwachungssystem mit den Merkmalen des ersten Patentanspruches gelöst.This object is achieved by a monitoring system with the features of the first claim solved.

Die erfindungsgemäß verwendeten AOW(Akustische Oberflächenwellen-)Sensoren, auch als SAW(Surface Acustic Wave)-Sensoren bezeichnet, sind an sich bekannt. Bisher jedoch ist noch nicht der Vorschlag gemacht oder der Versuch unternommen worden, sie auf geeignete Weise an Stufenschaltern einzusetzen. Bekannte AOW-Sensoren bestehen üblicherweise aus einem LiNbO3-Substrat, das in einem Metall- oder Keramikgehäuse, wie es für integrierte Schaltkreise verwendet wird, angeordnet ist. Ein solcher Sensor lässt sich über Funk drahtlos auslesen; die Ausbreitungsverluste auf den AOW-Sensor sind äußerst gering, und der Sensor benötigt keine Energieversorgung für die Signalverarbeitung. Zur Funkabfrage ist neben dem eigentlichen AOW-Sensor, der sich am Messort befindet, eine Abfrageeinheit erforderlich. Von einem Oszillator dieser Abfrageeinheit werden hochfrequente Impulse im Frequenzbereich zwischen 100 MHz und 3 GHz über eine Antenne abgestrahlt. Auf dem AOW-Sensor selbst befinden sich ein mit einer Antenne verbundener Interdigitalwandler sowie in vielen Fällen mehrere Reflektoren. Der Interdigitalwandler, üblicherweise kammförmig ausgebildet, wird durch den empfangenen hochfrequenten elektromagnetischen Impuls angeregt, und es wird über den piezoelektrischen Effekt eine akustische Oberflächenwelle erzeugt. Diese Oberflächenwelle wird an den Reflektoren teilweise reflektiert, so dass sie wieder den Interdigitalwandler erreicht. Dort wird sie zurückgewandelt und über die Antenne des AOW-Sensors abgestrahlt und kann von der Abfrageeinheit empfangen werden. Die vom AOW-Sensor abgestrahlte Impulsfolge, die von der Abfrageeinheit empfangen wird, enthält zunächst einmal als Information ein bestimmtes spezifisches Bitmusters des Sensors, das zu dessen Identifizierung dient. Eine einzige Abfrageeinheit kann also die Informationen von einer Vielzahl verschiedener AOW-Sensoren empfangen und den einzelnen Sensoren zuordnen. Zum anderen führt eine Änderung einer relevanten physikalischen Größe am Sensor zu einer Geschwindigkeitsveränderung der beschriebenen, sich auf dem Sensor ausbreitenden Oberflächenwelle oder auch zur Veränderung des geometrischen Abstandes der Reflektoren. Daraus ergibt sich eine Änderung der Impulslaufzeit, die im Abfragegeräte erfasst und ausgewertet wird und Rückschlüsse auf die entsprechende physikalische Größe bzw. deren Änderung im Umfeld des jeweiligen AOW-Sensors gestattet. Ein solcher AOW-Sensor ist ausführlich in der WO 96/33423 der SIEMENS AG beschrieben. The surface acoustic wave used in this invention (A kustische O berflächen w Ellen-) sensors, as a SAW (S urface A Custic W ave) sensors referred to, are known per se. So far, however, no suggestion has been made or no attempt has been made to use them on tap changers in a suitable manner. Known AOW sensors usually consist of a LiNbO 3 substrate, which is arranged in a metal or ceramic housing, as is used for integrated circuits. Such a sensor can be read wirelessly via radio; the propagation losses to the AOW sensor are extremely low and the sensor does not require any energy supply for signal processing. In addition to the actual AOW sensor located at the measurement location, a query unit is required for radio polling. High-frequency pulses in the frequency range between 100 MHz and 3 GHz are emitted by an oscillator of this interrogation unit via an antenna. On the AOW sensor itself there is an interdigital transducer connected to an antenna and in many cases several reflectors. The interdigital transducer, usually in the form of a comb, is excited by the received high-frequency electromagnetic pulse, and an acoustic surface wave is generated via the piezoelectric effect. This surface wave is partially reflected at the reflectors, so that it reaches the interdigital transducer again. There it is converted back and emitted via the antenna of the AOW sensor and can be received by the interrogation unit. The pulse sequence emitted by the AOW sensor, which is received by the interrogation unit, initially contains, as information, a specific, specific bit pattern of the sensor which is used to identify it. A single interrogation unit can therefore receive the information from a large number of different AOW sensors and assign it to the individual sensors. On the other hand, a change in a relevant physical quantity on the sensor leads to a change in the speed of the described surface wave propagating on the sensor or also to a change in the geometric spacing of the reflectors. This results in a change in the pulse duration, which is recorded and evaluated in the interrogation device and which allows conclusions to be drawn about the corresponding physical variable or its change in the environment of the respective AOW sensor. Such an AOW sensor is described in detail in WO 96/33423 from SIEMENS AG.

Aus der WO 96/33417 der gleichen Anmelderin ist es auch bereits bekannt, einen solchen AOW-Sensor zur Stromstärkemessung an auf Hochspannung liegenden elektrischen Einrichtungen zu verwenden. Bei dieser Anwendung nach Art eines Stromwandlers ist ein magneto-sensitives Element vorgesehen, das mit den Oberflächenwellenstrukturen gekoppelt ist. Eine solche per se bekannte Anordnung kann besonders vorteilhaft für eine erfindungsgemäße Überwachungseinrichtung verwendet werden.Such AOW sensor is also already known from WO 96/33417 by the same applicant for current measurement on electrical devices connected to high voltage use. In this type of current transformer application, there is a magneto-sensitive element provided that is coupled to the surface wave structures. One known per se Arrangement can be particularly advantageous for a monitoring device according to the invention be used.

Nachfolgend soll die Erfindung an Hand eines Ausführungsbeispieles noch näher erläutert werden. Die Figur zeigt den schematischen Aufbau einer erfindungsgemäßen Überwachungseinrichtung. Im oberen Bereich ist das Ölgefäß 1 eines Stufenschalters angedeutet, in dem sich drei Vakuumschaltröhren V1... V3 befinden - für jede Phase U, V, W ist in diesem Beispiel eine Vakuumschaltröhre vorgesehen. Die Erfindung ist jedoch nicht auf eine solche Anordnung beschränkt; die erfindungsgemäße Überwachungseinrichtung eignet sich für jede beliebige elektrische Schaltung von Stufenschaltern mit jeder beliebigen Zahl von solchen Vakuumschaltröhren pro Phase. Es soll hierbei zu bestimmten Zeitpunkten der Status der Vakuumschaltröhren V1... V3 überprüft, d. h. festgestellt werden, ob sie tatsächlich geöffnet haben. Ist dies im Fehlerfall nicht der Fall, fließt im entsprechenden Zweig ein Strom. Zur Erfassung dieses Stromes ist jeweils im Bereich jeder Vakuumschaltröhre ein AOW-Sensor S1...S3 vorgesehen. Diese AOW-Sensoren erfordern, wie weiter oben bereits dargestellt, keine separate Energieversorgung. Außerhalb des Ölgefäßes 1 des Stufenschalters befindet sich eine Abfrageeinheit 2, die einen Oszillator und eine Antenne aufweist. Der Oszillator strahlt hochfrequente Impulse über die Antenne hin zu den AOW-Sensoren S1...S3. Dort erzeugen sie auf an sich bekannte Weise eine akustische Oberflächenwelle, die, nachdem sie von den Reflektoren innerhalb des jeweiligen Sensors reflektiert worden ist, wieder zurück abgestrahlt und von der Abfrageeinheit 2 empfangen wird. Die von der Abfrageinheit 2 ausgesandte hochfrequente Strahlung ist durch eine Strichlinie angedeutet. Die von den einzelnen AOW-Sensoren S1...S3 zurück übermittelte Strahlung ist jeweils durch Punktlinien dargestellt; die unterschiedliche Punktierung soll dabei auf das spezifische Bitmuster hinweisen, das der Abfrageeinheit 2 eine sensorspezifische Zuordnung gestattet. Fließt im Fehlerfall, bei dem eine der Vakuumschaltröhren zum entsprechenden Abfragezeitpunkt nicht geöffnet ist, ein Strom durch den entsprechenden Zweig, so beeinflusst das elektromagnetische Feld im jeweiligen Leiter die Geschwindigkeit der sich auf dem jeweiligen Sensor ausbreitenden Oberflächenwelle und führt zu einer Änderung der Impulslaufzeit. Diese geänderte Impulslaufzeit des vom entsprechenden Sensor abgestrahlten Signales wird von der Abfrageeinheit 2 erfasst, als Fehlerinformation dem jeweiligen Sensor zugeordnet und als Information an die aus dem Stand der Technik bekannte Überwachungseinheit 3 gegeben.The invention will be explained in more detail below using an exemplary embodiment. The figure shows the schematic structure of a monitoring device according to the invention. in the The upper area indicates the oil tank 1 of a tap changer in which there are three Vacuum interrupters V1 ... V3 are located - for each phase U, V, W there is one in this example Vacuum interrupter provided. However, the invention is not limited to such an arrangement; the monitoring device according to the invention is suitable for any electrical circuit of tap changers with any number of such vacuum interrupters per phase. It should the status of the vacuum interrupters V1 ... V3 is checked at certain times, d. H. determine whether they are actually open. If this is not the case in the event of an error, flows in the corresponding branch a stream. To detect this current, everyone is in the area Vacuum interrupter an AOW sensor S1 ... S3 provided. These AOW sensors require how to proceed Already shown above, no separate energy supply. Outside of the oil tank 1 of the Step switch is an interrogation unit 2, which has an oscillator and an antenna. The oscillator emits high-frequency pulses via the antenna to the AOW sensors S1 ... S3. There they generate a surface acoustic wave in a manner known per se which, after they has been reflected by the reflectors within the respective sensor, emitted back again and is received by the interrogation unit 2. The one sent by the query unit 2 high-frequency radiation is indicated by a dashed line. The from the individual AOW sensors S1 ... S3 radiation transmitted back is represented by dotted lines; the different Puncturing is intended to indicate the specific bit pattern that query unit 2 has Sensor-specific assignment allowed. Flows in the event of a fault in which one of the vacuum interrupters a current is not open at the corresponding query time, a current through the corresponding branch, So the electromagnetic field in the respective conductor influences the speed on the respective sensor propagating surface wave and leads to a change in the pulse transit time. This changed pulse transit time of the signal emitted by the corresponding sensor is from the Interrogation unit 2 is recorded, assigned to the respective sensor as error information and as information given to the monitoring unit 3 known from the prior art.

Zu bestimmten, von der Schaltbewegung des Stufenschalters gesteuerten Kontrollzeitpunkten, zu denen jeweils einer von zwei Synchronkontakten RSW-1 oder RSW-2 betätigt wird, erfolgt ein Signalvergleich in einer Erkennungslogik # 1, die einen Systemfehler des Überwachungssystems erkennt, bzw. in einer Erkennungslogik # 2, die einen etwaigen Ausfall einer Vakuumschaltröhre V1...V3 erkennt. Im Ergebnis dieses Vergleichs melden Anzeigen K1...K3 immer dann eine Störung der entsprechenden Vakuumschaltröhre V1...V3, wenn zum Überprüfungszeitpunkt, zu dem alle Vakuumschaltröhren geöffnet sein sollten, in dieser Phase ein Stromfluss gemeldet wird. Eine weitere Anzeige K4 gibt ein Signal, wenn ein Systemfehler vorliegt.At certain control points controlled by the switching movement of the tap changer each of which is activated by one of two synchronous contacts RSW-1 or RSW-2 Signal comparison in a detection logic # 1, which shows a system error of the monitoring system detects, or in a detection logic # 2, the possible failure of a vacuum interrupter V1 ... V3 recognizes. As a result of this comparison, displays K1 ... K3 always report a fault the corresponding vacuum interrupter V1 ... V3, if at the time of inspection, at which all Vacuum interrupters should be open, a current flow is reported in this phase. Another Display K4 gives a signal when there is a system error.

Durch die Erfindung ist damit keinerlei Verbindung mehr mittels Lichtleitern oder anderen Übertragungsmedien vom Inneren des Stufenschalters nach außen erforderlich. Die Abfrageeinheit 2 als auch die Überwachungseinheit 3 können vielmehr außerhalb des Stufenschalters 1, beispielsweise im Bereich des Motorantriebes oder an anderer Stelle, angeordnet werden.With the invention, there is no longer any connection by means of light guides or others Transmission media required from the inside of the tap changer to the outside. The interrogation unit 2 and the monitoring unit 3 can rather be outside the tap changer 1, for example, in the area of the motor drive or elsewhere.

Claims (1)

Anordnung für ein Überwachungssystem an mit Vakuumschaltröhren zur Lastumschaltung arbeitenden Stufenschaltern,
dadurch gekennzeichnet, dass in jeder zu schaltenden Phase des Stufenschalters im Bereich jeder Vakuumschaltröhre (V1 ,...,V3) jeweils ein funkabfragbarer AOW-Sensor (S1,..., S3) angeordnet ist,
dass außerhalb des Stufenschalters eine Abfrageeinheit (2) vorgesehen ist, die eine hochfrequente Strahlung aussenden als auch empfangen kann
und dass die Abfrageeinheit (2) mit einer Überwachungseinheit (3) elektrisch in Verbindung steht.Arrangement for a monitoring system on tap changers working with vacuum interrupters for load switching,
characterized in that a radio-interrogable AOW sensor (S1, ..., S3) is arranged in each phase of the tap changer to be switched in the area of each vacuum interrupter (V1, ..., V3),
that an interrogation unit (2) is provided outside the tap changer, which can transmit and receive high-frequency radiation
and that the interrogation unit (2) is electrically connected to a monitoring unit (3).
EP04003100A 2003-04-03 2004-02-12 Arrangement for monitoring a tap changer Expired - Lifetime EP1465221B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10315205 2003-04-03
DE10315205 2003-04-03

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EP1465221A1 true EP1465221A1 (en) 2004-10-06
EP1465221B1 EP1465221B1 (en) 2006-10-04

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US (1) US6965217B2 (en)
EP (1) EP1465221B1 (en)
AT (1) ATE341826T1 (en)
DE (1) DE502004001631D1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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WO2012025420A1 (en) * 2010-08-27 2012-03-01 Siemens Aktiengesellschaft Method for retrieving a data point of a switch
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US8643221B2 (en) 2010-06-08 2014-02-04 Siemens Energy, Inc. Retrofit kit, circuitry and method for reconfiguring a tap changer to avoid electrical arcing
EP2691968B1 (en) 2011-03-27 2014-12-03 ABB Technology AG Tap changer with an improved monitoring system
CN103563032B (en) 2011-03-27 2017-05-10 Abb技术有限公司 Tap changer with an improved drive system

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WO2006048370A1 (en) * 2004-11-02 2006-05-11 Siemens Aktiengesellschaft Method and device for determining the position of electric conductor elements of an electric energy transmitting device
WO2012025420A1 (en) * 2010-08-27 2012-03-01 Siemens Aktiengesellschaft Method for retrieving a data point of a switch
US9354713B2 (en) 2010-08-27 2016-05-31 Siemens Aktiengesellschaft Method for retrieving a data point of a switch
WO2013156208A3 (en) * 2012-04-16 2014-08-07 Maschinenfabrik Reinhausen Gmbh Method and system for examining a tap changing device of a transformer

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ATE341826T1 (en) 2006-10-15
EP1465221B1 (en) 2006-10-04
US20040196010A1 (en) 2004-10-07
US6965217B2 (en) 2005-11-15
DE502004001631D1 (en) 2006-11-16

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