EP2079086B1 - Electric transformer unit - Google Patents

Electric transformer unit Download PDF

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Publication number
EP2079086B1
EP2079086B1 EP08021702.9A EP08021702A EP2079086B1 EP 2079086 B1 EP2079086 B1 EP 2079086B1 EP 08021702 A EP08021702 A EP 08021702A EP 2079086 B1 EP2079086 B1 EP 2079086B1
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EP
European Patent Office
Prior art keywords
fans
transformer unit
transformer
common
fan
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.)
Not-in-force
Application number
EP08021702.9A
Other languages
German (de)
French (fr)
Other versions
EP2079086A2 (en
EP2079086A3 (en
Inventor
Tobias Stirl
Martin Ellerik
Günther Hoba
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General Electric Technology GmbH
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General Electric Technology GmbH
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Publication date
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Publication of EP2079086A2 publication Critical patent/EP2079086A2/en
Publication of EP2079086A3 publication Critical patent/EP2079086A3/en
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Publication of EP2079086B1 publication Critical patent/EP2079086B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0233—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels
    • F28D1/024—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels with an air driving element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling

Definitions

  • the invention relates to an electrical transformer unit with an oil-filled transformer, in the transformer housing a plurality of coil windings are housed with one or more of the oil flowed throughderadiator / en, and with a plurality of the cooling radiators associated fans, wherein a common Power supply is provided for all fans.
  • a transformer unit is for example from the GB 768 517 A known. It is also known to connect the individual fans of such a transformer unit with an example remote control cabinet and from there on and off individually. For example, if there are ten fans, either none or only one or two and so on or all fans can be turned on. In this way, with the help of the fan, an air flow can be generated, the strength of which is adjustable in ten stages.
  • the object of the invention is to improve the control of the fan and to reduce the component required for this purpose.
  • a transformer unit according to claim 1.
  • any control and / or regulation of the speed of the fan is possible.
  • a common power supply is provided for all fans, which has a single common line from the fans to a remote control cabinet.
  • a bus is provided which connects all the fans in series with each other and with the remote control cabinet.
  • the component cost can be reduced.
  • the motor protection switch and overload protection can be assigned decentralized to the individual fans.
  • the component cost is reduced in the remote control cabinet.
  • FIG. 1 shows a schematic view of an embodiment of an electrical transformer unit according to the invention with a plurality of fans
  • FIG. 2 shows a schematic plan view of the transformer unit of FIG. 1 with a first embodiment according to the invention an electrical wiring of the fan
  • FIG. 3 shows a schematic circuit diagram for a second inventive embodiment of an electrical wiring of the fan FIG. 1
  • a transformer unit 10 is shown that includes a single- or multi-phase electrical transformer 11 that houses a plurality of coil windings (not shown) in a transformer housing 12.
  • the transformer housing 12 is filled with an oil 13, in particular with an insulating transformer oil. During operation of the transformer 11, this oil 13 is heated.
  • the oil 13 is passed from the transformer housing 12 via pipes 14 to one or more, arranged outside of the transformer housing 12deradiator / en 15 and from there back into the transformer housing 12.
  • a pump 16 interposed for the purpose of generating the described oil circuit.
  • the cooling radiators 15 From the cooling radiators 15, the heat contained in the oil is absorbed and discharged to the outside in the ambient air. So that the heat is dissipated from the immediate vicinity of the cooling radiators, electric fans 17 are provided, with the aid of which an air flow is generated, with which the heat emitted by the cooling radiators 15 heat is dissipated in the wider environment.
  • the fans 17 are associated with the radiators 15 and are thus arranged in the immediate vicinity of the radiators 15.
  • the fans 17 are arranged below the cooling radiators 15, so that an air flow in a vertical direction from bottom to top through the cooling radiators 15 is formed.
  • a plurality of fans 18 may be provided, which generate an air flow in the horizontal direction.
  • a plurality of the fans 17, 18 are provided. For example, 10 airs can be arranged in a row. This arrangement of fans can also be provided on the opposite, not shown in the figure page of the transformer 11. But it is also any other arrangement of a plurality of fans 17, 18 conceivable, if with these fans, the heat emitted by the radiators 15 heat can be dissipated in the wider environment.
  • the transformer unit 10 one or more sensors are present, with which the temperature of the oil 13 and / or the temperature of the transformer housing 12 and / or the temperature of the radiators 15 and / or the temperature of the radiators 15th flowing air and / or the like can be measured. Furthermore, one or more sensors are provided with which the current flowing through the coil windings of the transformer 11 and / or voltage applied to the coil windings voltage and / or the like can be measured.
  • FIG. 2 is a circuit diagram for the electrical wiring of the fan 17, 18 of the FIG. 1 shown.
  • the number of fans 17, 18 can be arbitrary.
  • the plurality of fans 17, 18 are arranged in each case in a row on the two longitudinal sides of the transformer 11.
  • the successive fans 17, 18 are connected to each other via a ring line 19.
  • the successive fans 17, 18 form a series circuit.
  • the ring line 19 includes on the one hand electrical lines for a common power supply of the fan 17, 18 and on the other hand, a bus and / or one or more digital and / or analog signal line / s for the control of the fan 17, 18. All these lines can preferably in one be led common cable.
  • the ring line 19 opens from both sides into a control cabinet 20.
  • the cabinet 20 means are provided to the electrical lines for the power supply of the To supply fans 17, 18 with the required electrical voltage.
  • This electrical voltage is preferably fed from both sides into the ring line 19.
  • all the fans 17, 18 can be supplied even with an interruption of the ring line 19 with the electrical voltage and thus continue to operate.
  • control means are included to supply the bus and / or the signal line / s with control signals for the fans 17, 18. It can be provided that the control signals are fed into the bus and / or the signal line (s) only from one side, that the first fan is a so-called master and the subsequent fans are so-called slaves, and that the master controls itself and the slaves or regulates. Alternatively it can be provided that the control or regulation is carried out in the control cabinet 20 or by a higher-level control, and that the control signals are fed from both sides into the bus and / or the signal line / s.
  • Each of the fans 17, 18 is designed such that it is infinitely adjustable in dependence on an input signal to an arbitrary speed between zero and a maximum speed.
  • the input signal can be fed to the respective fan 17, 18 via the bus and / or the signal line (s).
  • the input signal may be an analog or digital signal.
  • each of the fans 17, 18 another input signal can be fed, so that the various fans can be operated at any different speeds.
  • Each of the fans 17, 18 is provided with a control and / or regulation, with which the actual speed of the fan 17, 18 is set to that speed, the is specified by means of the input signal for the respective fan 17, 18. Furthermore, each of the fans 17, 18 is provided with protective devices, for example with a motor protection switch or an overload protection or the like.
  • the sensor signals measured by the sensor or sensors are processed, for example, by a higher-level control, for example, depending on the temperature of the oil 13 and / or depending on the current flowing in the coil windings a speed for the fan 17, 18 to determine. It is understood that other dependencies of the determination of the speed can be used.
  • all fans 17, 18 operate at a single speed or for each of the fans 17, 18 to determine a separate speed in each case depending on the aforementioned sensor signals and the individual fans 17, 18 then operate independently.
  • the speed determined for all fans 17, 18 or the speeds determined for the individual fans 17, 18 are transmitted to the fans 17, 18 via the bus and / or the control line (s).
  • the individual fans 17, 18 then adjust their actual speed continuously to the predetermined speed.
  • the predetermined speed (s) may vary depending on individual or several different sensor signals be determined.
  • the control or regulation can be carried out such that as far as possible none of the fans 17, 18 runs at its maximum speed, but that as far as possible all fans 17, 18 are operated at a speed which is less than the maximum speed. This contributes to the noise reduction.
  • FIG. 3 is a circuit diagram for the electrical wiring of the fan 17, 18 of the FIG. 1 shown.
  • the number of fans 17, 18 can - as explained - be arbitrary.
  • All fans 17, 18 are connected to a common power supply, which consists of a common terminal 21 for all fans 17, 18 and a single common line 22.
  • the entire power supply has at least two electrical lines 23, 24, but may also be formed in three or more phases.
  • the common connection 21 is present in the immediate area of the fans 17, 18, so that the length of the lines 23, 24 from the individual fans 17, 18 to the common connection 21 is small. From the common connection 21, the common line 22 leads, for example, in the direction of a remote control cabinet.
  • the length of this single common line 22 may be substantially greater than the length of the lines 23, 24 from the individual fans 17, 18 to the common terminal 21.
  • a bus and / or an analog and / or digital signal line 25 is provided, which connects all fans 17, 18 in series with each other.
  • the length of the bus or the signal line 25 between the individual fans 17, 18 is rather low, while the length of the bus or the signal line 25 from the last of the fan 17, 18, for example, to a remote control cabinet can be much larger than the aforesaid length between the fans 17, 18.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transformer Cooling (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Description

Die Erfindung betrifft eine elektrische Transformator-Einheit mit einem mit Öl gefüllten Transformator, in dessen Transformatorgehäuse eine Mehrzahl von Spulenwindungen untergebracht sind, mit einem oder mehreren von dem Öl durchflossenen Kühlradiator/en, und mit einer Mehrzahl von den Kühlradiatoren zugeordneten Lüftern, wobei eine gemeinsame Spannungsversorgung für alle Lüfter vorgesehen ist.
Eine derartige Transformator-Einheit ist beispielsweise aus der GB 768 517 A bekannt.
Weiter ist es bekannt, die einzelnen Lüfter einer derartigen Transformator-Einheit mit einem beispielsweise entfernt angeordneten Schaltschrank zu verbinden und von dort aus einzeln ein- und auszuschalten. Sind beispielsweise zehn Lüfter vorhanden, so können entweder keiner oder nur einer oder zwei und so weiter oder alle Lüfter eingeschaltet werden. Auf diese Weise kann mit Hilfe der Lüfter ein Luftstrom erzeugt werden, dessen Stärke in zehn Stufen einstellbar ist.The invention relates to an electrical transformer unit with an oil-filled transformer, in the transformer housing a plurality of coil windings are housed with one or more of the oil flowed through Kühlradiator / en, and with a plurality of the cooling radiators associated fans, wherein a common Power supply is provided for all fans.
Such a transformer unit is for example from the GB 768 517 A known.
It is also known to connect the individual fans of such a transformer unit with an example remote control cabinet and from there on and off individually. For example, if there are ten fans, either none or only one or two and so on or all fans can be turned on. In this way, with the help of the fan, an air flow can be generated, the strength of which is adjustable in ten stages.

Weiterer Stand der Technik ist aus der EP 1 470 948 A1 , der US 2007/0188282 A1 und der DE 10 2005 060 635 A1 bekannt.Further prior art is known from EP 1 470 948 A1 , of the US 2007/0188282 A1 and the DE 10 2005 060 635 A1 known.

Aufgabe der Erfindung ist es, die Steuerungsmöglichkeit der Lüfter zu verbessern und den hierzu erforderlichen Bauteileaufwand zu verringern.The object of the invention is to improve the control of the fan and to reduce the component required for this purpose.

Diese Aufgabe wird durch eine Transformator-Einheit gemäß dem Anspruch 1 gelöst. Mit Hilfe der stufenlosen Einstellbarkeit ist eine beliebige Steuerung und/oder Regelung der Drehzahl der Lüfter möglich. Gleichzeitig wird zusammen mit dieser Maßnahme eine gemeinsame Spannungsversorgung für alle Lüfter vorgesehen, die eine einzige gemeinsame Leitung von den Lüftern zu einem entfernt angeordneten Schaltschrank aufweist. Damit wird der Bauteileaufwand wesentlich vermindert. Weiterhin ist ein Bus vorgesehen, der alle Lüfter seriell miteinander und mit dem entfernt angeordneten Schaltschrank verbindet. Auch auf diese Weise kann der Bauteileaufwand verringert werden. Vorzugsweise können die Motorschutzschalter und Überlastsicherungen dezentral den einzelnen Lüftern zugeordnet sein. Damit wird der Bauteileaufwand in dem entfernt angeordneten Schaltschrank vermindert.This object is achieved by a transformer unit according to claim 1. With the help of stepless adjustability any control and / or regulation of the speed of the fan is possible. At the same time together with this measure, a common power supply is provided for all fans, which has a single common line from the fans to a remote control cabinet. Thus, the component cost is significantly reduced. Furthermore, a bus is provided which connects all the fans in series with each other and with the remote control cabinet. Also in this way the component cost can be reduced. Preferably, the motor protection switch and overload protection can be assigned decentralized to the individual fans. Thus, the component cost is reduced in the remote control cabinet.

Weitere Merkmale, Anwendungsmöglichkeiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung, die in den Figuren der Zeichnung dargestellt sind.Other features, applications and advantages of the invention will become apparent from the following description of embodiments of the invention, which are illustrated in the figures of the drawing.

Figur 1 zeigt eine schematische Ansicht eines Ausführungsbeispiels einer erfindungsgemäßen elektrischen Transformator-Einheit mit einer Mehrzahl von Lüftern, Figur 2 zeigt eine schematische Draufsicht auf die Transformator-Einheit der Figur 1 mit einem ersten erfindungsgemäßen Ausführungsbeispiel einer elektrischen Verdrahtung der Lüfter, und Figur 3 zeigt einen schematischen Schaltplan für ein zweites erfindungsgemäßes Ausführungsbeispiel einer elektrischen Verdrahtung der Lüfter der Figur 1.
In der Figur 1 ist eine Transformator-Einheit 10 gezeigt, die einen ein-oder mehrphasigen elektrischen Transformator 11 aufweist, bei dem in einem Transformatorgehäuse 12 eine Mehrzahl von Spulenwindungen (nicht gezeigt) untergebracht sind. Unter anderem zur Kühlung dieser Spulenwindungen ist das Transformatorgehäuse 12 mit einem Öl 13, insbesondere mit einem isolierenden Transformator-Öl gefüllt.
Im Betrieb des Transformators 11 wird dieses Öl 13 erwärmt. Zur Kühlung wird das Öl 13 aus dem Transformatorgehäuse 12 über Rohrleitungen 14 zu einem oder mehreren, außerhalb des Transformatorgehäuses 12 angeordneten Kühlradiator/en 15 geführt und von dort wieder zurück in das Transformatorgehäuse 12. Gegebenenfalls ist beispielsweise in einer der Rohrleitungen 14 eine Pumpe 16 zum Zwecke der Erzeugung des beschriebenen Ölkreislaufs zwischengeschaltet. FIG. 1 shows a schematic view of an embodiment of an electrical transformer unit according to the invention with a plurality of fans, FIG. 2 shows a schematic plan view of the transformer unit of FIG. 1 with a first embodiment according to the invention an electrical wiring of the fan, and FIG. 3 shows a schematic circuit diagram for a second inventive embodiment of an electrical wiring of the fan FIG. 1 ,
In the FIG. 1 For example, a transformer unit 10 is shown that includes a single- or multi-phase electrical transformer 11 that houses a plurality of coil windings (not shown) in a transformer housing 12. Among other things, for cooling these coil windings, the transformer housing 12 is filled with an oil 13, in particular with an insulating transformer oil.
During operation of the transformer 11, this oil 13 is heated. For cooling, the oil 13 is passed from the transformer housing 12 via pipes 14 to one or more, arranged outside of the transformer housing 12 Kühlradiator / en 15 and from there back into the transformer housing 12. Where appropriate, for example in one of the pipes 14, a pump 16 interposed for the purpose of generating the described oil circuit.

Von den Kühlradiatoren 15 wird die in dem Öl enthaltene Wärme aufgenommen und nach außen in die Umgebungsluft abgegeben. Damit die Wärme aus der unmittelbaren Umgebung der Kühlradiatoren abgeführt wird, sind elektrische Lüfter 17 vorgesehen, mit deren Hilfe ein Luftstrom erzeugt wird, mit dem die von den Kühlradiatoren 15 abgegebene Wärme in die weitere Umgebung abgeführt wird. Die Lüfter 17 sind den Radiatoren 15 zugeordnet und sind damit in der unmittelbaren Nachbarschaft der Radiatoren 15 angeordnet.From the cooling radiators 15, the heat contained in the oil is absorbed and discharged to the outside in the ambient air. So that the heat is dissipated from the immediate vicinity of the cooling radiators, electric fans 17 are provided, with the aid of which an air flow is generated, with which the heat emitted by the cooling radiators 15 heat is dissipated in the wider environment. The fans 17 are associated with the radiators 15 and are thus arranged in the immediate vicinity of the radiators 15.

Vorzugsweise sind die Lüfter 17 unterhalb der Kühlradiatoren 15 angeordnet, so dass ein Luftstrom in vertikaler Richtung von unten nach oben durch die Kühlradiatoren 15 entsteht.Preferably, the fans 17 are arranged below the cooling radiators 15, so that an air flow in a vertical direction from bottom to top through the cooling radiators 15 is formed.

Alternativ oder zusätzlich können mehrere Lüfter 18 vorgesehen sein, die einen Luftstrom in horizontaler Richtung erzeugen.Alternatively or additionally, a plurality of fans 18 may be provided, which generate an air flow in the horizontal direction.

Aufgrund der baulichen Größe des Transformators 11 sind eine Mehrzahl der Lüfter 17, 18 vorgesehen. So können beispielsweise 10 Lüfte in einer Reihe angeordnet sein. Diese Anordnung von Lüftern kann auch auf der gegenüberliegenden, in der Figur nicht dargestellten Seite des Transformators 11 vorgesehen sein. Es ist aber auch jegliche andere Anordnung einer Mehrzahl von Lüftern 17, 18 denkbar, sofern mit diesen Lüftern die von den Kühlradiatoren 15 abgegebene Wärme in die weitere Umgebung abgeführt werden kann.Due to the structural size of the transformer 11, a plurality of the fans 17, 18 are provided. For example, 10 airs can be arranged in a row. This arrangement of fans can also be provided on the opposite, not shown in the figure page of the transformer 11. But it is also any other arrangement of a plurality of fans 17, 18 conceivable, if with these fans, the heat emitted by the radiators 15 heat can be dissipated in the wider environment.

In nicht-dargestellter Weise sind bei der Transformator-Einheit 10 ein oder mehrere Sensoren vorhanden, mit denen die Temperatur des Öls 13 und/oder die Temperatur des Transformatorgehäuses 12 und/oder die Temperatur der Radiatoren 15 und/oder die Temperatur der die Radiatoren 15 durchströmenden Luft und/oder dergleichen gemessen werden kann. Weiterhin sind ein oder mehrere Sensoren vorhanden, mit denen der durch die Spulenwindungen des Transformators 11 fließende Strom und/oder die an den Spulenwindungen anliegende Spannung und/oder dergleichen gemessen werden kann.In a manner not shown, the transformer unit 10, one or more sensors are present, with which the temperature of the oil 13 and / or the temperature of the transformer housing 12 and / or the temperature of the radiators 15 and / or the temperature of the radiators 15th flowing air and / or the like can be measured. Furthermore, one or more sensors are provided with which the current flowing through the coil windings of the transformer 11 and / or voltage applied to the coil windings voltage and / or the like can be measured.

In der Figur 2 ist ein Schaltplan für die elektrische Verdrahtung der Lüfter 17, 18 der Figur 1 gezeigt. Die Anzahl der Lüfter 17, 18 kann beliebig sein.In the FIG. 2 is a circuit diagram for the electrical wiring of the fan 17, 18 of the FIG. 1 shown. The number of fans 17, 18 can be arbitrary.

In der Figur 2 sind die Mehrzahl der Lüfter 17, 18 in jeweils einer Reihe an den beiden Längsseiten des Transformators 11 angeordnet. Die aufeinanderfolgenden Lüfter 17, 18 sind über eine Ringleitung 19 miteinander verbunden. Insoweit bilden die aufeinanderfolgenden Lüfter 17, 18 eine Serienschaltung.In the FIG. 2 the plurality of fans 17, 18 are arranged in each case in a row on the two longitudinal sides of the transformer 11. The successive fans 17, 18 are connected to each other via a ring line 19. In that regard, the successive fans 17, 18 form a series circuit.

Die Ringleitung 19 beinhaltet einerseits elektrische Leitungen für eine gemeinsame Spannungsversorgung der Lüfter 17, 18 sowie andererseits einen Bus und/oder eine oder mehrere digitale und/oder analoge Signalleitung/en für die Steuerung der Lüfter 17, 18. All diese Leitungen können vorzugsweise in einem gemeinsamen Kabel geführt sein.The ring line 19 includes on the one hand electrical lines for a common power supply of the fan 17, 18 and on the other hand, a bus and / or one or more digital and / or analog signal line / s for the control of the fan 17, 18. All these lines can preferably in one be led common cable.

Die Ringleitung 19 mündet von beiden Seiten in einen Schaltschrank 20.The ring line 19 opens from both sides into a control cabinet 20.

In dem Schaltschrank 20 sind Mittel vorgesehen, um die elektrischen Leitungen für die Spannungsversorgung der Lüfter 17, 18 mit der erforderlichen elektrischen Spannung zu versorgen. Diese elektrische Spannung wird vorzugsweise von beiden Seiten in die Ringleitung 19 eingespeist. Damit können sämtliche Lüfter 17, 18 auch bei einer Unterbrechung der Ringleitung 19 mit der elektrischen Spannung versorgt und damit weiterbetrieben werden.In the cabinet 20 means are provided to the electrical lines for the power supply of the To supply fans 17, 18 with the required electrical voltage. This electrical voltage is preferably fed from both sides into the ring line 19. Thus, all the fans 17, 18 can be supplied even with an interruption of the ring line 19 with the electrical voltage and thus continue to operate.

In dem Schaltschrank 20 sind Steuermittel enthalten, um den Bus und/oder die Signalleitung/en mit Steuersignalen für die Lüfter 17, 18 zu versorgen. Dabei kann vorgesehen sein, dass die Steuersignale nur von einer Seite in den Bus und/oder die Signalleitung/en eingespeist werden, dass der erste Lüfter einen sogenannten Master und die nachfolgenden Lüfter sogenannte Slaves darstellen, und dass der Master sich selbst und die Slaves steuert oder regelt. Alternativ kann vorgesehen sein, dass die Steuerung oder Regelung in dem Schaltschrank 20 oder von einer übergeordneten Steuerung durchgeführt wird, und dass die Steuersignale von beiden Seiten in den Bus und/oder die Signalleitung/en eingespeist werden.In the control cabinet 20 control means are included to supply the bus and / or the signal line / s with control signals for the fans 17, 18. It can be provided that the control signals are fed into the bus and / or the signal line (s) only from one side, that the first fan is a so-called master and the subsequent fans are so-called slaves, and that the master controls itself and the slaves or regulates. Alternatively it can be provided that the control or regulation is carried out in the control cabinet 20 or by a higher-level control, and that the control signals are fed from both sides into the bus and / or the signal line / s.

Jeder der Lüfter 17, 18 ist derart ausgebildet, dass er in Abhängigkeit von einem Eingangssignal stufenlos auf eine beliebige Drehzahl zwischen Null und einer Maximaldrehzahl einstellbar ist. Das Eingangssignal ist dem jeweiligen Lüfter 17, 18 über den Bus und/oder die Signalleitung/en zuführbar. Das Eingangssignal kann ein analoges oder digitales Signal sein. Weiterhin ist jedem der Lüfter 17, 18 ein anderes Eingangssignal zuführbar, so dass die verschiedenen Lüfter mit beliebigen unterschiedlichen Drehzahlen betrieben werden können.Each of the fans 17, 18 is designed such that it is infinitely adjustable in dependence on an input signal to an arbitrary speed between zero and a maximum speed. The input signal can be fed to the respective fan 17, 18 via the bus and / or the signal line (s). The input signal may be an analog or digital signal. Furthermore, each of the fans 17, 18 another input signal can be fed, so that the various fans can be operated at any different speeds.

Jeder der Lüfter 17, 18 ist mit einer Steuerung und/oder Regelung versehen, mit der die tatsächliche Drehzahl des Lüfters 17, 18 auf diejenige Drehzahl eingestellt wird, die mittels des Eingangssignals für den jeweiligen Lüfter 17, 18 vorgegeben wird. Weiterhin ist jeder der Lüfter 17, 18 mit Schutzeinrichtungen versehen, beispielsweise mit einem Motorschutzschalter oder einer Überlastsicherung oder dergleichen.Each of the fans 17, 18 is provided with a control and / or regulation, with which the actual speed of the fan 17, 18 is set to that speed, the is specified by means of the input signal for the respective fan 17, 18. Furthermore, each of the fans 17, 18 is provided with protective devices, for example with a motor protection switch or an overload protection or the like.

Im Betrieb der Transformator-Einheit 10 werden die von dem oder den Sensoren gemessenen Sensorsignale beispielsweise von einer übergeordneten Steuerung verarbeitet, um beispielsweise in Abhängigkeit von der Temperatur des Öls 13 und/oder in Abhängigkeit von dem in den Spulenwindungen fließenden Strom eine Drehzahl für die Lüfter 17, 18 zu bestimmen. Es versteht sich, dass auch andere Abhängigkeiten der Ermittlung der Drehzahl zugrunde gelegt werden können.During operation of the transformer unit 10, the sensor signals measured by the sensor or sensors are processed, for example, by a higher-level control, for example, depending on the temperature of the oil 13 and / or depending on the current flowing in the coil windings a speed for the fan 17, 18 to determine. It is understood that other dependencies of the determination of the speed can be used.

Dabei ist es möglich, sämtliche Lüfter 17, 18 mit einer einzigen Drehzahl zu betreiben oder für jeden der Lüfter 17, 18 eine separate Drehzahl jeweils in Abhängigkeit der vorgenannten Sensorsignale zu bestimmen und die einzelnen Lüfter 17, 18 dann unabhängig voneinander zu betreiben.It is possible, all fans 17, 18 operate at a single speed or for each of the fans 17, 18 to determine a separate speed in each case depending on the aforementioned sensor signals and the individual fans 17, 18 then operate independently.

Die für alle Lüfter 17, 18 ermittelte Drehzahl oder die für die einzelnen Lüfter 17, 18 ermittelten Drehzahlen werden über den Bus und/oder die Steuerleitung/en an die Lüfter 17, 18 übertragen. Die einzelnen Lüfter 17, 18 stellen dann ihre tatsächliche Drehzahl stufenlos auf die vorgegebene Drehzahl ein.The speed determined for all fans 17, 18 or the speeds determined for the individual fans 17, 18 are transmitted to the fans 17, 18 via the bus and / or the control line (s). The individual fans 17, 18 then adjust their actual speed continuously to the predetermined speed.

Damit ist eine stufenlose Einstellung der Drehzahl aller Lüfter 17, 18 möglich, und zwar auf eine gemeinsame Drehzahl oder auf voneinander unabhängige Drehzahlen für die einzelnen Lüfter 17, 18. Die vorgegebene/n Drehzahl/en können dabei in Abhängigkeit von einzelnen oder mehreren verschiedenen Sensorsignalen ermittelt werden. Die erforderliche elektrische Energie erhalten die Lüfter 17, 18 über die elektrischen Leitungen für die Spannungsversorgung.Thus, a continuous adjustment of the speed of all fans 17, 18 is possible, namely at a common speed or at mutually independent speeds for the individual fans 17, 18. The predetermined speed (s) may vary depending on individual or several different sensor signals be determined. The Required electrical energy obtained by the fans 17, 18 via the electrical lines for the power supply.

Die Steuerung oder Regelung kann derart ausgeführt sein, dass möglichst keiner der Lüfter 17, 18 auf seiner maximalen Drehzahl läuft, sondern dass möglichst alle Lüfter 17, 18 mit einer Drehzahl betrieben werden, die kleiner ist als die maximale Drehzahl. Dies trägt zur Geräuschminderung bei.The control or regulation can be carried out such that as far as possible none of the fans 17, 18 runs at its maximum speed, but that as far as possible all fans 17, 18 are operated at a speed which is less than the maximum speed. This contributes to the noise reduction.

Weiterhin kann bei der Steuerung oder Regelung vorgesehen sein, dass ein Ausfall eines Lüfters erkannt wird, und dass dann die Drehzahl der verbleibenden Lüfter gerade so erhöht wird, dass der Ausfall kompensiert wird. Damit wird die Betriebssicherheit erhöht.Furthermore, it can be provided in the control or regulation that a failure of a fan is detected, and that then the speed of the remaining fan is just increased so that the failure is compensated. This increases the reliability.

In der Figur 3 ist ein Schaltplan für die elektrische Verdrahtung der Lüfter 17, 18 der Figur 1 gezeigt. Die Anzahl der Lüfter 17, 18 kann - wie erläutert wurde - beliebig sein.In the FIG. 3 is a circuit diagram for the electrical wiring of the fan 17, 18 of the FIG. 1 shown. The number of fans 17, 18 can - as explained - be arbitrary.

Sämtliche Lüfter 17, 18 sind an eine gemeinsame Spannungsversorgung, die aus einem gemeinsamen Anschluss 21 für alle Lüfter 17, 18 und einer einzigen gemeinsamen Leitung 22 besteht. Die gesamte Spannungsversorgung weist zumindest zwei elektrische Leitungen 23, 24 auf, kann aber auch drei- oder mehrphasig ausgebildet sein.All fans 17, 18 are connected to a common power supply, which consists of a common terminal 21 for all fans 17, 18 and a single common line 22. The entire power supply has at least two electrical lines 23, 24, but may also be formed in three or more phases.

Der gemeinsame Anschluss 21 ist im unmittelbaren Bereich der Lüfter 17, 18 vorhanden, so dass die Länge der Leitungen 23, 24 von den einzelnen Lüftern 17, 18 zu dem gemeinsamen Anschluss 21 gering ist. Von dem gemeinsamen Anschluss 21 führt die gemeinsame Leitung 22 beispielsweise in Richtung zu einem entfernt angeordneten Schaltschrank.The common connection 21 is present in the immediate area of the fans 17, 18, so that the length of the lines 23, 24 from the individual fans 17, 18 to the common connection 21 is small. From the common connection 21, the common line 22 leads, for example, in the direction of a remote control cabinet.

Die Länge dieser einzigen gemeinsamen Leitung 22 kann wesentlich größer sein als die Länge der Leitungen 23, 24 von den einzelnen Lüftern 17, 18 zu dem gemeinsamen Anschluss 21.The length of this single common line 22 may be substantially greater than the length of the lines 23, 24 from the individual fans 17, 18 to the common terminal 21.

Weiterhin ist in der Figur 3 ein Bus und/oder eine analoge und/oder digitaler Signalleitung 25 vorgesehen, der alle Lüfter 17, 18 seriell miteinander verbindet. Die Länge des Buses bzw. der Signalleitung 25 zwischen den einzelnen Lüftern 17, 18 ist dabei eher gering, während die Länge des Buses bzw. der Signalleitung 25 von dem letzten der Lüfter 17, 18 beispielsweise zu einem entfernt angeordneten Schaltschrank wesentlich größer sein kann als die vorgenannte Länge zwischen den Lüftern 17, 18.Furthermore, in the FIG. 3 a bus and / or an analog and / or digital signal line 25 is provided, which connects all fans 17, 18 in series with each other. The length of the bus or the signal line 25 between the individual fans 17, 18 is rather low, while the length of the bus or the signal line 25 from the last of the fan 17, 18, for example, to a remote control cabinet can be much larger than the aforesaid length between the fans 17, 18.

Claims (5)

  1. Electrical transformer unit (10) with a transformer (11), which is filled with oil (13) and the transformer housing (12) of which contains multiple coil windings, with one or several cooling radiators (15) through which the oil (13) flows, and with a plurality of fans (17, 18) assigned to the radiators (15), wherein a common power supply is provided for all fans (17, 18), and wherein the rotation speed of all fans (17, 18) is fully adjustable,
    wherein each fan (17, 18) is configured such that it controls and/or regulates its actual rotation speed to the predefined rotation speed,
    wherein the common power supply for all fans (17, 18) consists of a common connection (21) for all fans (17, 18) and a single common line (22),
    wherein the common connection (21) is present in the immediate vicinity of the fans (17, 18),
    wherein the fans (17, 18) are connected to the common connection (21) via an electrical parallel circuit,
    wherein the single common line (22) leads from the fans (17, 18) to a remotely arranged switch cabinet, and
    wherein a bus and/or a control line is provided which connects all fans (17, 18) serially together and to the remotely arranged switch cabinet.
  2. Transformer unit (10) according to claim 1, wherein the rotation speed of all fans (17, 18) is fully adjustable depending on the temperature of the oil (13) and/or the current flowing through the coil windings.
  3. Transformer unit (10) according to claim 1 or 2, wherein all fans (17, 18) are fully and commonly adjustable.
  4. Transformer unit (10) according to claim 1 or 2, wherein each fan (17, 18) is fully adjustable independently of the other fans (17, 18).
  5. Transformer unit (10) according to any of the preceding claims, wherein the common power supply for all fans (17, 18) is configured as a ring line.
EP08021702.9A 2008-01-09 2008-12-15 Electric transformer unit Not-in-force EP2079086B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008003672A DE102008003672A1 (en) 2008-01-09 2008-01-09 Electric transformer unit

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EP2079086A2 EP2079086A2 (en) 2009-07-15
EP2079086A3 EP2079086A3 (en) 2011-01-26
EP2079086B1 true EP2079086B1 (en) 2018-03-28

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EP08021702.9A Not-in-force EP2079086B1 (en) 2008-01-09 2008-12-15 Electric transformer unit

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EP (1) EP2079086B1 (en)
DE (1) DE102008003672A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010006308A1 (en) 2010-01-30 2011-08-04 Maschinenfabrik Reinhausen GmbH, 93059 OLTC
DE102010046949A1 (en) 2010-09-29 2012-03-29 Maschinenfabrik Reinhausen Gmbh Vent valve for connection with pipe line and for e.g. hermetic transformer, has guide pin opening or closing vent dependent on level of liquid, permanent magnet arranged at lever, and counter magnet firmly arranged at housing
DE102012207844A1 (en) * 2012-05-10 2013-11-14 Alstom Technology Ltd. Arrangement with a transformer
CN106653291A (en) * 2017-01-10 2017-05-10 全球能源互联网研究院 System for performing forced circulating cooling on transformer through day and night temperature difference

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB768517A (en) * 1954-04-19 1957-02-20 Gen Electric Cooling system for induction apparatus
DE60029621T2 (en) 1999-11-17 2007-08-09 Trexco, LLC, Indianapolis DEVICE AND METHOD FOR COOLING POWER TRANSFORMERS
EP1470948A1 (en) * 2003-04-22 2004-10-27 ABB Sécheron SA Traction transformer and method for monitoring an operating status of a traction transformer
DE102005060635A1 (en) * 2005-12-13 2007-06-14 Siemens Ag Control method for cooling a technical system
US7567160B2 (en) * 2006-02-15 2009-07-28 American Superconductor Corporation Supplementary transformer cooling in a reactive power compensation system

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Title
None *

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Publication number Publication date
EP2079086A2 (en) 2009-07-15
DE102008003672A1 (en) 2009-07-16
EP2079086A3 (en) 2011-01-26

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