WO2015062838A1 - Dry-type transformer coil and dry-type transformer - Google Patents
Dry-type transformer coil and dry-type transformer Download PDFInfo
- Publication number
- WO2015062838A1 WO2015062838A1 PCT/EP2014/071714 EP2014071714W WO2015062838A1 WO 2015062838 A1 WO2015062838 A1 WO 2015062838A1 EP 2014071714 W EP2014071714 W EP 2014071714W WO 2015062838 A1 WO2015062838 A1 WO 2015062838A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dry
- coil
- type transformer
- transformer
- radially
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
Definitions
- the invention relates to a dry-type transformer coil comprising a hollow-cylindrical coil with at least one radially inner and one radially outer winding.
- the invention also relates to a dry type transformer comprising a transformer core having at least two core legs.
- dry-type transformers for example in the rated voltage range of 6 kV, 10 kV, 20 kV, 30 kV, do without a special insulation medium such as oil.
- a special insulation medium such as oil.
- their construction can be simplified on the one hand in an advantageous manner.
- the use of air as an insulating medium due to their limited isolation ability increased insulation distances to live components.
- appropriate coolant for removing the heat loss occurring during operation of the dry transformer are provided, for example, axially extending cooling channels, which are usually arranged between radially adjacent winding segments.
- a dry-type transformer coil of the aforementioned type is characterized in that on the radially outer surface of the coil an at least partially encircling barrier structure extending at least over its axial length with at least one layer of strips of an insulating material and at least one is provided radially from this supported barrier wall, wherein the radially outermost barrier wall has an electrical screen.
- the basic idea of the invention is to realize the contact protection of a dry-type transformer coil in that its outer surface is provided with a barrier structure at least on the manually achievable surface areas, which is designed such that the stress load occurring during operation is maintained.
- a barrier structure at least on the manually achievable surface areas, which is designed such that the stress load occurring during operation is maintained.
- the structure of the barrier structure of insulating strips and the protective wall carried therefrom is similar to the construction of a cooling channel typically arranged between radially adjacent winding segments of a dry transformer coil and thus particularly easy to integrate into the radial outer surface of the dry transformer coil.
- strip material for example, glass fiber reinforced strips of a composite material are suitable, which are ideally arranged along the axial extent of the coil on the radially outer surface.
- the thereby radially supported barrier wall can be made for example of shell-like segments of a cylinder made of an insulating material, this simplifies the production in a special way.
- Such resin-impregnated fiber rovings which are also known under the name "prepreg" in a dry intermediate state of the resin, are heated to a polymerization temperature after the actual winding process and form a mechanically very strong structure during the cooling process which are also useful as cooling channels in an advantageous manner.
- the electric screen is designed as a metallic shield or as a metallization.
- a metallic shield for example, the radial outer surface or inner surface of the barrier structure is provided with a conductive sheet or a conductive foil, but it is also possible in principle to wrap such a metallic shield directly into the radially supported barrier wall, for example when using fiber rovings. This advantageously increases the mechanical stability of the dry-type transformer coil according to the invention.
- a metal layer is applied to the actually electrically insulating radially supported barrier wall, for example by vapor deposition or else the application of a metallically conductive lacquer material.
- the barrier structure encloses the coil in its entirety.
- the touching of the entire radial outer surface of the dry transformer coil allows safe.
- the connections of the radially outer winding are guided on the face side out of the coil. As a result, the integrity of the electrical screen is not compromised.
- the object according to the invention is also achieved by a dry-type transformer comprising a transformer core with at least two core limbs, wherein a dry-type transformer coil according to the invention is arranged around at least one of the at least two core limbs and wherein their respective electrical shield is connected to ground potential.
- a dry-type transformer coil according to the invention is arranged around at least one of the at least two core limbs and wherein their respective electrical shield is connected to ground potential.
- the wall of a housing without additional isolation distance can be built up directly to the radial outer surface of a respective dry-type transformer coil.
- the dry-type transformer has mechanical components which are earthed and which also constitute a mechanical contact protection for the surface regions of a respective dry-type transformer coil
- a corresponding barrier structure can in principle also be dispensed with in these surface regions.
- the electrical screens of at least two adjacent dry-transformer coils are not executed completely at least in partial regions of coil surfaces facing one another.
- the electrical screens are designed and electrically connected to one another in such a way that the at least two adjacent dry-type transformer coils are enveloped by the connected screen.
- Fig. 2 shows a first exemplary dry-type transformer as well
- FIG. 3 shows a second exemplary dry-type transformer.
- the dry-transformer coil 10 comprises a hollow-cylindrical radially inner winding 12 and an adjoining radially outer winding 14, which are nested one inside the other.
- a barrier structure is arranged completely around the radially outer surface of the coil formed by the windings 12, 14.
- the barrier structure has a plurality of star-like around the central axis of the coil and along its axial extent extending strips 16, through which a ring-like arranged around this barrier wall 18 is radially supported.
- the axial length of the barrier wall 18 slightly exceeds the axial length of the coil in order to increase the frontal protection against contact.
- an electrical shield 20 is metallized, which is connected to ground potential 24. In this way, a safe contact with the radial outer surface of the dry-transformer coil is also during their operation allows.
- the hollow cylindrical dry-type transformer coil is arranged around a core leg 26 of a transformer core.
- FIG. 2 shows a first exemplary dry-type transformer 30 in a sectional view.
- a dry-type transformer coil 32, 34, 36 is arranged to three parallel arranged in a common plane core leg of a three-limbed transformer core.
- Each dry-transformer coil 32, 34, 36 has a barrier structure with an electric screen, which is not completely formed around the respective dry-transformer coil, but is interrupted in partial regions of mutually facing coil surfaces of adjacent dry-type transformer coils.
- the electrical shields respectively integrated in the barrier structures are mechanically and electrically connected together to form a grounded shell-like shield 42, which surrounds the three dry-transformer coils 32, 34, 36 in a band-like manner and ensures a safe contact with the accessible surface areas of the dry-transformer coils 32, 34, 36 is.
- FIG. 3 shows a second exemplary dry-type transformer 50 in a sectional view. This essentially corresponds to the dry transformer 30 shown in FIG. 2.
- a dry-type transformer coil 52, 54, 56 according to the invention is arranged in each case around three core limbs of a three-limb transformer core arranged in parallel in a common plane.
- Each dry-transformer coil 52, 54, 56 has a separately grounded 64 electric screen 58, 60, 62, which is not fully pronounced around the respective dry-transformer coil, but is interrupted in some areas. Since the electrical screens are not mechanically connected to each other, theoretically contacting of mutually facing coil surfaces of adjacent dry-transformer coils 52, 54, 56 is possible, but unintentional contact is precluded due to the difficult accessibility of the respective surface areas. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
Trockentransformatorspule und Trockentransformator Dry transformer coil and dry-type transformer
Beschreibung description
Die Erfindung betrifft eine Trockentransformatorspule, umfassend eine hohlzylindrische Spule mit wenigstens einer radial innen liegenden und einer radial außen liegenden Wicklung. Die Erfindung betrifft auch einen Trockentransformator, umfassend einen Transformatorkern mit wenigstens zwei Kernschenkeln. The invention relates to a dry-type transformer coil comprising a hollow-cylindrical coil with at least one radially inner and one radially outer winding. The invention also relates to a dry type transformer comprising a transformer core having at least two core legs.
Es ist allgemein bekannt, dass Trockentransformatoren, beispielsweise im Nennspannungsbereich von 6kV, 10kV, 20kV, 30kV, ohne ein spezielles Isolationsmedium wie beispielsweise Öl auskommen. Hierdurch lässt sich deren Konstruktion auf der einen Seite in vorteilhafter Weise vereinfachen. Auf der anderen Seite bedingt die Verwendung von Luft als Isolationsmedium aufgrund von deren begrenzter Isolationsfähigkeit vergrößerte Isolationsabstände zu spannungsführenden Bauteilen. Darüber hinaus sind auch entsprechende Kühlmittel zum Abtransport der im Betrieb auftretenden Verlustwärme des Trockentransformators vorzusehen, beispielsweise axial verlaufende Kühlkanäle, welche üblicher Weise zwischen radial benachbarten Wicklungssegmenten angeordnet sind. It is generally known that dry-type transformers, for example in the rated voltage range of 6 kV, 10 kV, 20 kV, 30 kV, do without a special insulation medium such as oil. As a result, their construction can be simplified on the one hand in an advantageous manner. On the other hand, the use of air as an insulating medium due to their limited isolation ability increased insulation distances to live components. In addition, appropriate coolant for removing the heat loss occurring during operation of the dry transformer are provided, for example, axially extending cooling channels, which are usually arranged between radially adjacent winding segments.
Ein inhärenter Berührungsschutz eines Trockentransformators, wie beispielsweise bei der Anordnung eines Transformators in einem mit Öl gefüllten Kessel, ist nicht gegeben. Als nachteilig erweist sich hierbei, dass dies zu einer Gefährdung des Bedien- und Wartungspersonals führt, weil spannungsführende Komponenten aufgrund von Nachlässigkeit unbeabsichtigt berührt werden könnten. Eine bekannte Anordnung eines Transformators in einem geerdeten Gehäuse stellt zwar einerseits einen wirksamen Berührungsschutz dar, führt aber andererseits zu einer nachteilig erhöhten Baugröße des Transformators mit Gehäuse, weil selbstverständlich auch alle benötigten dielektrischen Abstände zwischen den spannungsführenden Komponenten des Transformators und dem geerdeten Gehäuse einzuhalten sind. Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, eine Trockentransformatorspule und einen Trockentransformator mit verbessertem Berührungsschutz anzugeben. An inherent protection against contact of a dry transformer, such as in the arrangement of a transformer in an oil-filled boiler, is not given. A disadvantage here proves that this leads to a threat to the operating and maintenance personnel, because live components could be touched accidentally due to negligence. Although a known arrangement of a transformer in a grounded housing on the one hand provides an effective protection against contact, but on the other hand leads to a disadvantageously increased size of the transformer with housing, because of course, all the required dielectric distances between the live components of the transformer and the grounded housing must be observed. Based on this prior art, it is an object of the invention to provide a dry-type transformer coil and a dry-type transformer with improved contact protection.
Diese Aufgabe wird gelöst von einer Trockentransformatorspule der eingangs genannten Art. Diese ist dadurch gekennzeichnet, dass an der radial äußeren Oberfläche der Spule eine zumindest teilweise umlaufende und sich wenigstens über deren axiale Länge erstreckende Barrierenstruktur mit wenigstens einer Lage Leisten aus einem isolierenden Material und wenigstens einer radial von diesen abgestützten Barrierewandung vorgesehen ist, wobei die radial äußerste Barrierewandung einen elektrischen Schirm aufweist. This object is achieved by a dry-type transformer coil of the aforementioned type. This is characterized in that on the radially outer surface of the coil an at least partially encircling barrier structure extending at least over its axial length with at least one layer of strips of an insulating material and at least one is provided radially from this supported barrier wall, wherein the radially outermost barrier wall has an electrical screen.
Die Grundidee der Erfindung besteht darin, den Berührungsschutz einer Trockentransformatorspule dadurch zu realisieren, dass deren äußere Oberfläche zumindest an den manuell erreichbaren Oberflächenbereichen mit einer Barrierenstruktur versehen wird, welche derart ausgelegt ist, dass die im Betrieb auftretende Spannungsbelastung gehalten ist. Somit ist es ermöglicht, die radial äußerste Barrierenwandung mit einem geerdeten elektrisch leitfähigen Schirm zu versehen, der gefahrlos von einer ebenfalls auf Erdpotential befindlichen Person berührt werden kann. Der Aufbau der Barrierenstruktur aus isolierenden Leisten und davon getragener Schutzwandung ist dem Aufbau eines typischerweise zwischen radial benachbarten Wicklungssegmenten einer Trockentransformatorspule angeordneten Kühlkanals ähnlich und damit besonders einfach auch in die radiale Außenfläche der Trockentransformatorspule zu integrieren. The basic idea of the invention is to realize the contact protection of a dry-type transformer coil in that its outer surface is provided with a barrier structure at least on the manually achievable surface areas, which is designed such that the stress load occurring during operation is maintained. Thus, it is possible to provide the radially outermost barriers wall with a grounded electrically conductive screen that can be safely touched by a person also at ground potential person. The structure of the barrier structure of insulating strips and the protective wall carried therefrom is similar to the construction of a cooling channel typically arranged between radially adjacent winding segments of a dry transformer coil and thus particularly easy to integrate into the radial outer surface of the dry transformer coil.
Als Leistenmaterial sind beispielsweise glasfaserverstärkte Leisten aus einem Verbundwerkstoff geeignet, welche idealerweise längs der axialen Erstreckung der Spule auf deren radial äußeren Oberfläche angeordnet sind. Die dadurch radial abgestützte Barrierenwandung kann beispielsweise aus schalenähnlichen Segmenten eines Zylinders aus einem Isolationsmaterial gefertigt sein, dies vereinfacht die Herstellung in besonderer Weise. Es ist aber auch erfindungsgemäß optional vorgesehen, die radial abgestützte Barrierenwandung zumindest teilweise aus einem gewickelten Bandmaterial wie einem mit Harz imprägniertem Faserroving herzustellen oder auch die gegebenenfalls vorhandenen schalenähnlichen Segmente radial au- ßen damit zu fixieren. Derartige harzgetränkte Faserrovings, welche in einem trockenen Zwischenzustand des Harzes auch unter dem Namen„Prepreg" bekannt sind, werden nach dem eigentlichen Wickelvorgang auf eine Polymerisationstemperatur erhitzt und bilden beim Abkühlvorgang eine mechanisch sehr feste Struktur. Typischerweise sind durch die Barrierenstruktur axial verlaufende kanalähnliche Hohlräume gebildet, welche in vorteilhafter Weise auch als Kühlkanäle nutzbar sind. As strip material, for example, glass fiber reinforced strips of a composite material are suitable, which are ideally arranged along the axial extent of the coil on the radially outer surface. The thereby radially supported barrier wall can be made for example of shell-like segments of a cylinder made of an insulating material, this simplifies the production in a special way. However, it is also optionally provided according to the invention to at least partially produce the radially supported barrier wall from a wound strip material such as a resin impregnated fiber roving, or else to radially outwardly present shell-like segments. to fix it with it. Such resin-impregnated fiber rovings, which are also known under the name "prepreg" in a dry intermediate state of the resin, are heated to a polymerization temperature after the actual winding process and form a mechanically very strong structure during the cooling process which are also useful as cooling channels in an advantageous manner.
Gemäß einer weiteren Ausgestaltungsform der erfindungsgemäßen Trockentransformatorspule ist der elektrische Schirm als metallischer Schirm oder als Metallisierung ausgeführt. Im Falle eines metallischen Schirms ist beispielsweise die radiale Außenfläche oder Innenfläche der Barrierenstruktur mit einem leitfähigen Blech oder einer leitfähigen Folie versehen, es ist aber prinzipiell auch möglich, einen derartigen metallischen Schirm direkt in die radial abgestützte Barrierenwandung mit einzuwickeln, beispielsweise bei Verwendung von Faserrovings. Dies erhöht in vorteilhafter Weise die mechanische Stabilität der erfindungsgemäßen Trockentransformatorspule. According to a further embodiment of the dry-type transformer coil according to the invention, the electric screen is designed as a metallic shield or as a metallization. In the case of a metallic shield, for example, the radial outer surface or inner surface of the barrier structure is provided with a conductive sheet or a conductive foil, but it is also possible in principle to wrap such a metallic shield directly into the radially supported barrier wall, for example when using fiber rovings. This advantageously increases the mechanical stability of the dry-type transformer coil according to the invention.
Im Falle einer Metallisierung wird auf die eigentlich elektrisch isolierende radial abgestützte Barrierenwandung eine Metallschicht aufgetragen, beispielsweise durch Aufdampfung oder auch das Auftragen eines metallisch leitfähigen Lackmaterials. In the case of a metallization, a metal layer is applied to the actually electrically insulating radially supported barrier wall, for example by vapor deposition or else the application of a metallically conductive lacquer material.
Einer weiteren Variante der erfindungsgemäßen Trockentransformatorspule folgend ragen zumindest Teile der Barrierenstruktur über die axialen Enden der hohlzylindrischen Spule heraus. Hierdurch ist in vorteilhafter Weise ein zusätzlicher Berührungsschutz der Trockentransformatorspule auch in ihren Stirnbereichen erreicht. Following a further variant of the dry-type transformer coil according to the invention, at least parts of the barrier structure project beyond the axial ends of the hollow-cylindrical coil. As a result, an additional protection against contact of the dry transformer coil is achieved in their forehead areas in an advantageous manner.
Gemäß einer bevorzugten Erfindungsvariante umschließt die Barrierenstruktur die Spule vollumfänglich. Hierdurch das Berühren der gesamten radialen Außenfläche der Trockentransformatorspule gefahrlos ermöglicht. Dies ist insbesondere dann von Vorteil, wenn keine um die Spule verbaute Struktur eines Transformators vorhanden ist, welche für einen Teilbereich der Spulenoberfläche einen Berührungsschutz darstellt. Gemäß einer weiteren Variante der erfindungsgemäßen Trockentransformatorspule sind die Anschlüsse der radial äußeren Wicklung stirnseitig aus der Spule geführt. Hierdurch wird die Integrität des elektrischen Schirmes nicht gefährdet. According to a preferred variant of the invention, the barrier structure encloses the coil in its entirety. As a result, the touching of the entire radial outer surface of the dry transformer coil allows safe. This is particularly advantageous if there is no structure of a transformer built around the coil, which constitutes a contact protection for a subregion of the coil surface. According to a further variant of the dry-type transformer coil according to the invention, the connections of the radially outer winding are guided on the face side out of the coil. As a result, the integrity of the electrical screen is not compromised.
Die erfindungsgemäße Aufgabe wird auch gelöst durch einen Trockentransformator, umfassend einen Transformatorkern mit wenigstens zwei Kernschenkeln, wobei um mindestens einen der wenigstens zwei Kernschenkel eine erfindungsgemäße Trockentransformatorspule angeordnet ist und wobei deren jeweiliger elektrischer Schirm mit Erdpotential verbunden ist. Der erfindungsgemäße Berührungsschutz der radialen Außenflächen der Spulen führt in vorteilhafter Weise zu einer Reduktion der Baugröße des Trockentransformators, da auf ein Gehäuse, in welchen der Trockentransformator integriert ist, verzichtet werden kann. The object according to the invention is also achieved by a dry-type transformer comprising a transformer core with at least two core limbs, wherein a dry-type transformer coil according to the invention is arranged around at least one of the at least two core limbs and wherein their respective electrical shield is connected to ground potential. The contact protection according to the invention of the radial outer surfaces of the coils advantageously leads to a reduction in the size of the dry-type transformer, since a housing in which the dry-type transformer is integrated can be dispensed with.
Aber auch bei Verwendung eines Gehäuses kann dieser aufgrund der erfindungsgemäßen Barrierenstruktur kleiner ausgeführt werden als ohne erfindungsgemäße Barrierenstruktur, weil dann innerhalb des Gehäuses deutlich weniger Bereiche mit kritischen Potentialdifferenzen vorhanden sind. So kann beispielsweise die Wandung eines Gehäuses ohne zusätzlichen Isolationsabstand bis direkt an die radiale Außenfläche einer jeweiligen Trockentransformatorspule gebaut werden. But even when using a housing, this can be made smaller due to the barrier structure according to the invention than without barrier structure according to the invention, because then significantly fewer areas with critical potential differences are present within the housing. Thus, for example, the wall of a housing without additional isolation distance can be built up directly to the radial outer surface of a respective dry-type transformer coil.
Für den Fall, dass der Trockentransformator mechanische Komponenten aufweist, welche geerdet sind und welche in sich auch einen mechanischen Berührungsschutz für die Oberflächenbereiche von einer jeweiligen Trockentransformatorspule darstellen, kann in diesen Oberflächenbereichen prinzipiell auch auf eine entsprechende Barrierenstruktur verzichtet werden. In the event that the dry-type transformer has mechanical components which are earthed and which also constitute a mechanical contact protection for the surface regions of a respective dry-type transformer coil, a corresponding barrier structure can in principle also be dispensed with in these surface regions.
Dies ist beispielsweise bei Teilbereichen gegeneinander zugewandter Spulenoberflächen benachbart angeordneter Trockentransformatorspulen der Fall. Hier ist zumindest ein unbeabsichtigtes Berühren ausgeschlossen, weil diese Bereiche zu der den Trockentransformator umschließenden Hüllkontur nach innen zurückgesetzt sind. Deshalb ist in einer Erfindungsvariante vorgesehen, dass die elektrischen Schirme von wenigstens zwei benachbarten Trockentransformatorspulen zumindest in Teilbereichen gegeneinander zugewandter Spulenoberflächen nicht vollumfänglich ausgeführt sind. Gemäß einer besonders bevorzugten Ausgestaltungsform des erfindungsgemäßen Trockentransformators sind die elektrischen Schirme derart ausgestaltet und elektrisch miteinander verbunden, dass die wenigstens zwei benachbarten Trockentransformatorspulen hüllenähnlich von dem verbundenen Schirm umschlossen sind. Hierdurch sind alle manuell erreichbaren Bereiche der Spulenoberflächen ohne Risiko berührbar. This is the case, for example, in the case of partial regions of coil surfaces facing one another, arranged adjacent to those of the dry-type transformer coils. Here, at least accidental contact is excluded, because these areas are set back to the enveloping the dry transformer enveloping profile inside. Therefore, in a variant of the invention, it is provided that the electrical screens of at least two adjacent dry-transformer coils are not executed completely at least in partial regions of coil surfaces facing one another. According to a particularly preferred embodiment of the dry-type transformer according to the invention, the electrical screens are designed and electrically connected to one another in such a way that the at least two adjacent dry-type transformer coils are enveloped by the connected screen. As a result, all manually reachable areas of the coil surfaces can be touched without risk.
Weitere vorteilhafte Ausgestaltungsmöglichkeiten sind den weiteren abhängigen Ansprüchen zu entnehmen. Further advantageous embodiment possibilities can be found in the further dependent claims.
Anhand der in den Zeichnungen dargestellten Ausführungsbeispiele sollen die Erfindung, weitere Ausführungsformen und weitere Vorteile näher beschrieben werden. Reference to the embodiments illustrated in the drawings, the invention, further embodiments and other advantages will be described in detail.
Es zeigen: Show it:
Fig. 1 eine exemplarische Trockentransformatorspule, 1 shows an exemplary dry-type transformer coil,
Fig. 2 einen ersten exemplarischen Trockentransformator sowie Fig. 2 shows a first exemplary dry-type transformer as well
Fig. 3 einen zweiten exemplarischen Trockentransformator. 3 shows a second exemplary dry-type transformer.
Fig. 1 zeigt eine exemplarische erfindungsgemäße Trockentransformatorspule 10 in einer Draufsicht. Die Trockentransformatorspule 10 umfasst eine hohlzylindrische radial innere Wicklung 12 und eine daran anschließende radial äußere Wicklung 14, welche ineinander verschachtelt sind. Um die radial äußere Oberfläche der durch die Windungen 12, 14 gebildeten Spule ist vollumfänglich eine Barrierenstruktur angeordnet. Die Barrierenstruktur weist mehrere sternähnlich um die Mittelachse der Spule und längs deren axialer Erstreckung verlaufende Leisten 16 auf, durch welche eine ringähnlich um diese herum angeordnete Barrierenwandung 18 radial abgestützt ist. Die axiale Länge der Barrierenwandung 18 übersteigt geringfügig die axiale Länge der Spule, um auch stirnseitig den Berührungsschutz zu erhöhen. Direkt auf der radialen Außenfläche der Barrierenwandung 18 ist ein elektrischer Schirm 20 aufmetallisiert, welcher mit Erdpotential 24 verbunden ist. Auf diese Weise ist ein gefahrloses Berühren der radialen Außenfläche der Trockentransformatorspule auch während deren Betrieb ermöglicht. Die hohlzylindrische Trockentransformatorspule ist um einen Kernschenkel 26 eines Transformatorkerns angeordnet. 1 shows an exemplary inventive dry-type transformer coil 10 in a plan view. The dry-transformer coil 10 comprises a hollow-cylindrical radially inner winding 12 and an adjoining radially outer winding 14, which are nested one inside the other. A barrier structure is arranged completely around the radially outer surface of the coil formed by the windings 12, 14. The barrier structure has a plurality of star-like around the central axis of the coil and along its axial extent extending strips 16, through which a ring-like arranged around this barrier wall 18 is radially supported. The axial length of the barrier wall 18 slightly exceeds the axial length of the coil in order to increase the frontal protection against contact. Directly on the radial outer surface of the barrier wall 18, an electrical shield 20 is metallized, which is connected to ground potential 24. In this way, a safe contact with the radial outer surface of the dry-transformer coil is also during their operation allows. The hollow cylindrical dry-type transformer coil is arranged around a core leg 26 of a transformer core.
Fig. 2 zeigt einen ersten exemplarischen Trockentransformator 30 in einer Schnittansicht. Um drei parallel in einer gemeinsamen Ebene angeordnete Kernschenkel eines dreischenkligen Transformatorkerns ist jeweils eine erfindungsgemäße Trockentransformatorspule 32, 34, 36 angeordnet. Jede Trockentransformatorspule 32, 34, 36 weist eine Barrierenstruktur mit einem elektrischen Schirm auf, welcher nicht vollumfänglich um die jeweilige Trockentransformatorspule ausgeprägt ist, sondern in Teilbereichen gegeneinander zugewandter Spulenoberflächen benachbarter Trockentransformatorspulen unterbrochen ist. Die in die Barrierenstrukturen jeweils integriertem elektrischen Schirme sind mechanisch und elektrisch miteinander zu einem geerdeten 44 hüllenähnlichen Schirm 42 verbunden, welcher die drei Trockentransformatorspulen 32, 34, 36 bandähnlich umschließt und durch welchen ein gefahrloses Berühren der zugänglichen Oberflächenbereiche der Trockentransformatorspulen 32, 34, 36 gewährleistet ist. FIG. 2 shows a first exemplary dry-type transformer 30 in a sectional view. To three parallel arranged in a common plane core leg of a three-limbed transformer core each have a dry-type transformer coil 32, 34, 36 is arranged. Each dry-transformer coil 32, 34, 36 has a barrier structure with an electric screen, which is not completely formed around the respective dry-transformer coil, but is interrupted in partial regions of mutually facing coil surfaces of adjacent dry-type transformer coils. The electrical shields respectively integrated in the barrier structures are mechanically and electrically connected together to form a grounded shell-like shield 42, which surrounds the three dry-transformer coils 32, 34, 36 in a band-like manner and ensures a safe contact with the accessible surface areas of the dry-transformer coils 32, 34, 36 is.
Fig. 3 zeigt einen zweiten exemplarischen Trockentransformator 50 in einer Schnittansicht. Dieser entspricht im Wesentlichen dem in der Figur 2 gezeigten Trockentransformator 30. Um drei parallel in einer gemeinsamen Ebene angeordnete Kernschenkel eines dreischenkligen Transformatorkerns ist jeweils eine erfindungsgemäße Trockentransformatorspule 52, 54, 56 angeordnet. Jede Trockentransformatorspule 52, 54, 56 weist einen separat geerdeten 64 elektrischen Schirm 58, 60, 62 auf, welcher nicht vollumfänglich um die jeweilige Trockentransformatorspule ausgeprägt, sondern in Teilbereichen unterbrochen ist. Da die elektrischen Schirme nicht mechanisch miteinander verbunden sind ist theoretisch zwar ein Berühren gegeneinander zugewandter Spulenoberflächen benachbarter Trockentransformatorspulen 52, 54, 56 möglich, ein unbeabsichtigtes Berühren jedoch aufgrund der schweren Zugänglichkeit der betreffenden Oberflächenbereiche ausgeschlossen. Bezugszeichenliste 3 shows a second exemplary dry-type transformer 50 in a sectional view. This essentially corresponds to the dry transformer 30 shown in FIG. 2. A dry-type transformer coil 52, 54, 56 according to the invention is arranged in each case around three core limbs of a three-limb transformer core arranged in parallel in a common plane. Each dry-transformer coil 52, 54, 56 has a separately grounded 64 electric screen 58, 60, 62, which is not fully pronounced around the respective dry-transformer coil, but is interrupted in some areas. Since the electrical screens are not mechanically connected to each other, theoretically contacting of mutually facing coil surfaces of adjacent dry-transformer coils 52, 54, 56 is possible, but unintentional contact is precluded due to the difficult accessibility of the respective surface areas. LIST OF REFERENCE NUMBERS
10 exemplarische Trockentransformatorspule 10 exemplary dry-type transformer coil
12 radial innen liegende Wicklung 12 radially inner winding
14 radial außen liegende Wicklung 14 radially outer winding
16 Leisten 16 bars
18 radial abgestützte Barrierenwandung 18 radially supported barrier wall
20 elektrischer Schirm 20 electric screen
22 kanalähnlicher Hohlraum 22 channel-like cavity
24 Erd potential 24 earth potential
26 Kernschenkel 26 core thighs
30 erster exemplarischer Trockentransformator 30 first exemplary dry-type transformer
32 erste Spule von erstem Trockentransformator 32 first coil of first dry-type transformer
34 zweite Spule von erstem Trockentransformator 34 second coil of the first dry-type transformer
36 dritte Spule von erstem Trockentransformator 36 third coil of first dry-type transformer
38 erster Teilbereich gegeneinander zugewandter Spulenoberflächen 38 first portion of mutually facing coil surfaces
40 zweiter Teilbereich gegeneinander zugewandter Spulenoberflächen40 second portion of mutually facing coil surfaces
42 hüllenähnlich verbundene Schirme 42 sheath-like connected umbrellas
44 Erd potential 44 earth potential
50 zweiter exemplarischer Trockentransformator 50 second exemplary dry-type transformer
52 erste Spule von zweitem Trockentransformator 52 first coil of second dry-type transformer
54 zweite Spule von zweitem Trockentransformator 54 second coil of second dry-type transformer
56 dritte Spule von zweitem Trockentransformator 56 third coil of second dry-type transformer
58 Schirm von erster Spule 58 screen of first coil
60 Schirm von zweiter Spule 60 screen from second coil
62 Schirm von dritter Spule 62 screen from third coil
64 Erd potential 64 earth potential
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13005136.0 | 2013-10-29 | ||
| EP13005136.0A EP2869313B1 (en) | 2013-10-29 | 2013-10-29 | Dry transformer coil and dry transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015062838A1 true WO2015062838A1 (en) | 2015-05-07 |
Family
ID=49515155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2014/071714 Ceased WO2015062838A1 (en) | 2013-10-29 | 2014-10-10 | Dry-type transformer coil and dry-type transformer |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2869313B1 (en) |
| ES (1) | ES2639111T3 (en) |
| WO (1) | WO2015062838A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10886054B2 (en) * | 2017-01-25 | 2021-01-05 | Delta Electronics (Shanghai) Co., Ltd | High-voltage transformer and electronic power apparatus |
| CN113168958A (en) * | 2018-11-29 | 2021-07-23 | Abb电网瑞士股份公司 | dry-type transformer |
| US11250990B2 (en) | 2017-01-25 | 2022-02-15 | Delta Electronics (Shanghai) Co., Ltd | High-voltage transformer and electronic power apparatus |
| US11417456B2 (en) | 2017-01-25 | 2022-08-16 | Delta Electronics (Shanghai) Co., Ltd | High-voltage transformer and electronic power apparatus |
| US11515080B2 (en) | 2017-01-25 | 2022-11-29 | Delta Electronics (Shanghai) Co., Ltd | Transformer, coil unit and electronic power apparatus |
| WO2023077604A1 (en) * | 2021-11-02 | 2023-05-11 | 山东电工电气集团智能电气有限公司 | Dry-type transformer coil winding method, dry-type transformer coil and dry-type transformer |
| US20230326649A1 (en) * | 2020-04-14 | 2023-10-12 | Siemens Energy Global GmbH & Co. KG | Electrical device having a tank with a convex bulging portion |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109215950B (en) * | 2018-11-06 | 2021-03-12 | 江西北斗变电科技有限公司 | Supporting structure for improving short-circuit resistance of transformer and implementation method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3142029A (en) * | 1960-08-22 | 1964-07-21 | Gen Electric | Shielding of foil wound electrical apparatus |
| EP0199280A2 (en) * | 1985-04-19 | 1986-10-29 | Siemens Aktiengesellschaft | Contacting metal covered plastic parts of a coil form |
| CN2463937Y (en) * | 2001-02-13 | 2001-12-05 | 云南变压器电气股份有限公司 | Semi-closed dry type transformer |
| WO2006103193A2 (en) * | 2005-04-01 | 2006-10-05 | Siemens Aktiengesellschaft | Transformer provided with an electrical shielding |
| WO2008033249A2 (en) * | 2006-09-11 | 2008-03-20 | Abb Technology Ag | Dry-type transformer with shielded core/coil assembly and method of manufacturing the same |
| CN100411074C (en) * | 2004-08-07 | 2008-08-13 | 常州华迪特种变压器有限公司 | Three-phase dry-type transformer |
| DE102008011802A1 (en) * | 2008-02-27 | 2009-09-03 | Siemens Aktiengesellschaft | Throttling arrangement with a coil having a first and a second partial winding |
| WO2009126977A1 (en) * | 2008-04-18 | 2009-10-22 | Trench Austria Gmbh | Electrostatic screen for an hvdct component |
| EP2428967A1 (en) * | 2010-09-08 | 2012-03-14 | ABB Technology AG | Transformer coil |
-
2013
- 2013-10-29 ES ES13005136.0T patent/ES2639111T3/en active Active
- 2013-10-29 EP EP13005136.0A patent/EP2869313B1/en active Active
-
2014
- 2014-10-10 WO PCT/EP2014/071714 patent/WO2015062838A1/en not_active Ceased
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3142029A (en) * | 1960-08-22 | 1964-07-21 | Gen Electric | Shielding of foil wound electrical apparatus |
| EP0199280A2 (en) * | 1985-04-19 | 1986-10-29 | Siemens Aktiengesellschaft | Contacting metal covered plastic parts of a coil form |
| CN2463937Y (en) * | 2001-02-13 | 2001-12-05 | 云南变压器电气股份有限公司 | Semi-closed dry type transformer |
| CN100411074C (en) * | 2004-08-07 | 2008-08-13 | 常州华迪特种变压器有限公司 | Three-phase dry-type transformer |
| WO2006103193A2 (en) * | 2005-04-01 | 2006-10-05 | Siemens Aktiengesellschaft | Transformer provided with an electrical shielding |
| WO2008033249A2 (en) * | 2006-09-11 | 2008-03-20 | Abb Technology Ag | Dry-type transformer with shielded core/coil assembly and method of manufacturing the same |
| DE102008011802A1 (en) * | 2008-02-27 | 2009-09-03 | Siemens Aktiengesellschaft | Throttling arrangement with a coil having a first and a second partial winding |
| WO2009126977A1 (en) * | 2008-04-18 | 2009-10-22 | Trench Austria Gmbh | Electrostatic screen for an hvdct component |
| EP2428967A1 (en) * | 2010-09-08 | 2012-03-14 | ABB Technology AG | Transformer coil |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10886054B2 (en) * | 2017-01-25 | 2021-01-05 | Delta Electronics (Shanghai) Co., Ltd | High-voltage transformer and electronic power apparatus |
| US11250990B2 (en) | 2017-01-25 | 2022-02-15 | Delta Electronics (Shanghai) Co., Ltd | High-voltage transformer and electronic power apparatus |
| US11417456B2 (en) | 2017-01-25 | 2022-08-16 | Delta Electronics (Shanghai) Co., Ltd | High-voltage transformer and electronic power apparatus |
| US11515080B2 (en) | 2017-01-25 | 2022-11-29 | Delta Electronics (Shanghai) Co., Ltd | Transformer, coil unit and electronic power apparatus |
| CN113168958A (en) * | 2018-11-29 | 2021-07-23 | Abb电网瑞士股份公司 | dry-type transformer |
| US20230326649A1 (en) * | 2020-04-14 | 2023-10-12 | Siemens Energy Global GmbH & Co. KG | Electrical device having a tank with a convex bulging portion |
| WO2023077604A1 (en) * | 2021-11-02 | 2023-05-11 | 山东电工电气集团智能电气有限公司 | Dry-type transformer coil winding method, dry-type transformer coil and dry-type transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2869313A1 (en) | 2015-05-06 |
| EP2869313B1 (en) | 2017-05-31 |
| ES2639111T3 (en) | 2017-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2869313B1 (en) | Dry transformer coil and dry transformer | |
| EP2636113B1 (en) | Electrical shieldingg arrangement for an interface of a line for a hvdc transmission component | |
| EP2428967B1 (en) | Transformer coil | |
| WO2012092941A1 (en) | Transformer winding with cooling channel | |
| DE69718516T2 (en) | CONTROLLABLE INDUCTOR | |
| EP2927923B1 (en) | Dry transformer load switch | |
| EP2793244B1 (en) | Dry transformer coil and dry transformer | |
| EP1529296B1 (en) | Winding arrangement | |
| DE2050769A1 (en) | Insulating spacer | |
| EP2827346B1 (en) | Dry type transformer | |
| EP2866235B1 (en) | High voltage transformer | |
| EP3353795B1 (en) | High-voltage device | |
| EP3093938B1 (en) | High voltage implementation system | |
| EP3001437B1 (en) | Feedthrough system | |
| EP2764521A1 (en) | Surge arrester | |
| DE102008011802A1 (en) | Throttling arrangement with a coil having a first and a second partial winding | |
| DE19612931C2 (en) | Winding arrangement of a transformer or a choke | |
| EP2369602B1 (en) | Assembly with at least two coils axially stacked on the same core leg | |
| EP3076409B1 (en) | Electrical connection between separated windings | |
| EP3001433B1 (en) | Pin-isolator adapted for a transformer | |
| DE102014209262B3 (en) | The spark gap arrangement | |
| DE2251933C3 (en) | Method and device for the production of dry-insulated tube sputter for transformers, chokes or the like. Induction devices with two or more layers and cooling channels | |
| CH660812A5 (en) | Overvoltage suppressor having metal-oxide varistors, and a method for its production | |
| WO2015172804A1 (en) | High-voltage feedthrough and method for the production thereof | |
| EP0088934A1 (en) | Disc coil winding with interleaved singular or double coils |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14783814 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 14783814 Country of ref document: EP Kind code of ref document: A1 |