EP3427276B1 - Transformator mit einsteckbaren hochspannungsdurchführungen - Google Patents

Transformator mit einsteckbaren hochspannungsdurchführungen Download PDF

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Publication number
EP3427276B1
EP3427276B1 EP17720444.3A EP17720444A EP3427276B1 EP 3427276 B1 EP3427276 B1 EP 3427276B1 EP 17720444 A EP17720444 A EP 17720444A EP 3427276 B1 EP3427276 B1 EP 3427276B1
Authority
EP
European Patent Office
Prior art keywords
bushing
voltage
section
plug
housing
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.)
Active
Application number
EP17720444.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3427276A1 (de
Inventor
Christian ETTL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Energy Global GmbH and Co KG
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Siemens Energy Global GmbH and Co KG
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Publication date
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Publication of EP3427276A1 publication Critical patent/EP3427276A1/de
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Publication of EP3427276B1 publication Critical patent/EP3427276B1/de
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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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/94—Holders formed as intermediate parts for linking a counter-part to a coupling part

Definitions

  • the invention relates to an electrical device for connection to a high-voltage network with a housing that can be filled with an insulating liquid, in which a core with at least one winding is arranged, a bushing attached to the housing, and a high-voltage bushing that can be inserted into the bushing.
  • Such an electrical device is, for example, from DE 10 2007 022 641 A1 already known.
  • a transformer is disclosed which has sockets into which bushings for connecting the transformer to a high-voltage network can be inserted.
  • the transformer is designed as a so-called traveling transformer, which is designed in such a way that it can be transported between different locations with as little assembly effort as possible while maintaining a specified profile.
  • the previously known electrical device has the disadvantage that the pluggable bushings are only designed for voltages in the lower high-voltage range.
  • the FR 2 113 911 A1 discloses a transformer electrical apparatus having two windings 26 and 28 each enclosing a core portion which are parts of a closed iron circuit. The windings are thus inductively coupled to one another.
  • core windings are arranged in a housing or tank which is filled with an insulating fluid.
  • Each winding is connected via a connecting line to the high-voltage conductor of a high-voltage bushing, the insertion section of which extends through a through-opening in the cover of the tank into the oil-filled interior of the tank. It is attached to the cover with the aid of an attachment section.
  • the length L1 from the attachment section to the free end of the insertion section L1 is given as approximately two meters.
  • the length of the pillar section of the bushing extending from the fastening means to an outdoor connection is five meters.
  • the EP 2 442 321 A1 relates to a calotte for a high-voltage lead-out.
  • the DE 12 82 170 B describes a removable bushing for power transformers, wherein the bushing can be releasably attached to the transformer tank with fasteners. A separation point is provided between the connecting line and the bushing so that the bushing can be easily installed. However, the insertion end of the high-voltage bushing extends into the oil-filled tank of the transformer 10 .
  • the EP 2 431 982 B1 describes a high-voltage bushing with a plug contact.
  • the bushing can be plugged into a bushing so that the plug contact of the bushing is electrically conductively connected to a contact part of the socket.
  • the contact part is in turn connected to a primary winding of the transformer via a connecting line which extends inside a transformer housing.
  • the bushing socket is firmly mounted on the transformer housing and seals the transformer housing from the outside. In this way, the transformer housing can be easily transported without a bushing.
  • the bushing is simply plugged into the socket on site. This speeds up the commissioning of the transformer. A complex electrical connection between the high-voltage bushing and the winding is avoided.
  • the object of the invention is to provide an electrical device of the type mentioned at the outset that can also be used at higher voltages.
  • the high-voltage bushing has a fastening section with which it can be fastened to the housing and/or to the bushing socket and from which it extends with a column section in a longitudinal direction over a length L2 to a high-voltage connection, wherein the length L2 is greater than three meters.
  • an electrical device for example a transformer or a choke, which is designed for voltages above 150 kV.
  • the high-voltage bushing is dimensioned accordingly for this.
  • the high-voltage bushing has a fastening section with which the high-voltage bushing can be fixed or fastened to the housing of the electrical device.
  • a pillar section of the high-voltage bushing which extends longitudinally from the fastening section to a high-voltage connection at the free end of the high-voltage bushing, has a length L2 of more than 3 meters.
  • High-voltage bushings in this voltage range have not previously been designed as plug-in components. The electrical insulation required for this was classified as too complex.
  • an electrical device with a plug-in bushing is also provided in higher voltage ranges for the first time. The weights that occur are absorbed by the fastening section.
  • the pillar section expediently extends perpendicularly or at right angles to a horizontal housing cover of the housing, so that the weight of the high-voltage bushing is introduced directly from above, ie vertically, into the bushing socket.
  • the weight of the bushing thus ensures a high contact pressure within the socket, so that in this way good insulation is provided by a solid-state composite.
  • the high-voltage bushing is connected to the bushing socket by means of an expedient, detachable connection, for example a screw connection.
  • the high-voltage bushing leads via an insertion section that is provided for insertion into the bushing socket.
  • the high-voltage bushing has an insertion section that also extends in said longitudinal direction, with which the high-voltage bushing extends into the bushing socket over a length L1, the length L1 being shorter than 600 mm.
  • the plug-in section of the high-voltage bushing has been shortened compared to comparable high-voltage bushings in the same voltage range. This shortening enables a correspondingly shorter bushing which, in other words, extends less deeply into the housing of the electrical device, ie into its oil chamber. With this version, there is no need to mount a current transformer on the bushing.
  • each bushing has a fastening section for fastening to the housing, with a hollow receiving section made of an electrically non-conductive insulating material extending into the housing, with a metallic contact part being arranged in a closed and tapered end area of the receiving section, which extends through the insulating material of the receiving section extends or extends it towards the closed end area.
  • each bushing socket has an open end approximately at the level of the housing cover, which allows insertion of the plug-in section of the high-voltage bushing.
  • a receiving section extends from the fastening section of the bushing into the interior of the housing, with the receiving section being made of an insulating material that provides the necessary insulation between the contact piece, which is at a high voltage potential during operation, and the housing of the transformer, which is located on is at ground potential.
  • the receiving section and the plug-in section are designed to complement one another, so that due to the dead weight of the high-voltage bushing, the plug-in section is pressed firmly against the inner wall of the receiving section, in order to avoid voltage peaks between the high-voltage bushing and the plug-in socket.
  • the contact part is advantageously connected to a winding via a winding connection line which extends inside the housing.
  • the winding connection line is equipped with a current transformer. Due to the fact that the current transformer is arranged inside the housing, the current transformer no longer has to be integrated into the wiring harness in a time-consuming process when the electrical device is installed on site. In other words, the electrical device according to the invention can be put into operation quickly on site. Complex installation of current transformers is avoided with this design. Conveniently are Mounting openings provided in the housing to allow access to the or the current transformer after draining the insulating liquid.
  • the plug-in section of the high-voltage bushing is encased by a viscous insulator, with a high-voltage conductor extending through the viscous insulator or, in other words, the casing, at the free end of the plug-in section.
  • the viscous or highly viscous insulator as the outer shell, ensures adequate electrical insulation between the insulating and dimensionally stable solids of the plug-in socket and the plug-in section lying against one another.
  • the insulator is expediently a pasty, lubricious substance with flow properties.
  • the viscous insulator Due to the flow properties, the viscous insulator is pressed into the joint between the plug-in section of the high-voltage bushing and the receiving section of the bushing and fills it completely.
  • the receiving section has a sufficiently large additional volume with free spaces into which the viscous insulator can be pressed. In this way, air pockets between the plug-in section and the receiving section, which result in high electrical field strengths, can be avoided.
  • FIG. 1 shows a perspective view of an embodiment of the electrical device according to the invention, which is designed as a transformer 1 here.
  • the transformer 1 shown there has a housing 2 which is equipped with a cooling module 3, an expansion tank 4, an auxiliary power module 5 and high-voltage bushings 6, 7, 8.
  • the components or modules mentioned are detachably connected to one another and can therefore be easily dismantled and transported independently of one another.
  • arresters 9 which have a non-linear resistance within their arrester housing, which changes over from a non-conductive state to a conductive state in the event of overvoltages and thus protects the components connected in parallel to it.
  • the high-voltage bushings 6, 7 and 8 are each designed as plug-in high-voltage bushings and their insertion end can be inserted into suitable bushing sockets 10.
  • the bushings 10 are of rotationally symmetrical design and delimit a cavity which is open towards the housing cover but is closed on one side and which is designed to complement the plug-in section of the respective high-voltage bushing 6 , 7 , 8 .
  • the bushings 10 are also attached to the housing 2 in a fluid-tight manner, so that the interior or oil space of the single-phase transformer 1 is hermetically, ie air-tight and liquid-tight, sealed off from the outside atmosphere.
  • a line bolt that cannot be seen in the figure is held as a contact part, which, when the high-voltage bushing 6, 7 or 8 is inserted into the respective bushing 10, is in conductive contact with the high-voltage conductor that extends through the respective high-voltage bushing 6, 7, 8 .
  • Said line bolt extends into the interior of the housing 2, ie into its oil chamber, where it is in contact with a winding connection line, which thus electrically connects the bushing socket to the respective high-voltage or low-voltage winding of the transformer 1.
  • a pillar section 12 extends from the fastening connection 11 to a high-voltage connection 13, which in the exemplary embodiment shown is an outdoor connection.
  • FIG figure 2 shows the housing 2 of the transformer 1 according to FIG figure 1 in a top view.
  • the housing 2 has three plug-in sockets 10, which are figure 2 all are sealed fluid-tight with a lid.
  • Fluid-tight here means that the cover closes the openings in an airtight and liquid-tight manner by means of appropriate sealing means.
  • figure 3 shows a bushing 10 and a high-voltage bushing 8 in a sectional side view, the high-voltage bushing 8 being inserted into the bushing 10 with an insertion section 22 .
  • the bushing 10 has a fastening section 14 with which it is fixedly mounted on a cover 15 of the housing 2 . Expedient screw connections are used for this purpose, for example.
  • sealing means (not shown in the figures) are required, which are clamped between the cover 15 and the fastening section 14 designed as a flange.
  • Each feedthrough socket 10 further includes a receiving portion 16 made of an electrically non-conductive material.
  • the receiving section 16 tapers towards a closed end 17 .
  • the wall of the receiving section 16 is penetrated by a bolt-shaped contact part 18 .
  • the contact part 18 is connected to a winding connecting line 20 and a shielding cap 21 as shielding on its section which protrudes into the interior 19 or oil chamber of the housing 2 .
  • the winding connection line 20 is also fitted with a current transformer 26, which is figure 4 is shown.
  • the current transformer 26 is thus permanently installed in the housing and is used to detect an electric current flowing via the winding connection line 20 to or from the respective winding.
  • the insertion section 22 extends from the fastening section 11 of the high-voltage bushing 8 into the receiving section 16 of the bushing socket 10 .
  • the plug-in section 22 is designed to be complementary in shape to the receiving section 16, so that the two components fit together with a perfect fit and air or other inclusions can be avoided.
  • the distance between the fastening section and the free end of the high-voltage bushing 8 is denoted as L1.
  • FIG. 4 shows in an example not falling under the claims, the feedthrough socket 10 in an
  • FIG figure 5 shows the housing 2 of the transformer 1 according to FIG figure 1 in a side view.
  • the two high-voltage bushings 6 and 8 can be seen in this view, which are inserted into their associated bushing sockets 10 .
  • the column section 12 extends over a length L2 that, according to the invention, is greater than 3 meters, so that the high-voltage bushings 6, 8 are fit for sufficiently high voltages and have a sufficiently high dielectric strength.
  • the plug-in section 22 has a jacket 25 made of a viscous insulator, which extends the plug-in section 22 to the outside completes, with only the high-voltage conductor 24 protruding from the jacket 25.
  • the viscous insulator of the jacket 25 rests against the inside of the receiving section 16, with the viscous jacket 25 filling up free spaces between the plug-in socket and the plug-in section of the high-voltage bushing, so that air pockets and thus high electric field strengths are avoided.
  • FIG 6 shows the rotationally symmetrical plug-in socket 10 from above.
  • the fastening section 14 is again designed as a conventional flange connection, it also being evident that the receiving section 16 extends downwards from the fastening section 14, i.e. into the oil or interior space 19, with the receiving section 16 tapering to a closed end.
  • the contact part 18 can be seen at the closed end.
  • the contact part 18 is designed as a sleeve and is therefore closed on one side.
  • the inside diameter of the sleeve 18 is slightly larger than the outside diameter of the conductor 24, with resilient contact fingers providing a sufficiently good electrical contact.
  • the receiving section 16 consists of a wall made of an insulating material that is not electrically conductive. During operation, the contact part 18 is at a high-voltage potential, with the housing 2 and thus also the housing cover 15 and the fastening section 14 being at ground potential.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Insulators (AREA)
EP17720444.3A 2016-04-29 2017-04-26 Transformator mit einsteckbaren hochspannungsdurchführungen Active EP3427276B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016207405.9A DE102016207405A1 (de) 2016-04-29 2016-04-29 Transformator mit einsteckbaren Hochspannungsdurchführungen
PCT/EP2017/059845 WO2017186751A1 (de) 2016-04-29 2017-04-26 Transformator mit einsteckbaren hochspannungsdurchführungen

Publications (2)

Publication Number Publication Date
EP3427276A1 EP3427276A1 (de) 2019-01-16
EP3427276B1 true EP3427276B1 (de) 2022-01-19

Family

ID=58645053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17720444.3A Active EP3427276B1 (de) 2016-04-29 2017-04-26 Transformator mit einsteckbaren hochspannungsdurchführungen

Country Status (7)

Country Link
US (1) US10685772B2 (pt)
EP (1) EP3427276B1 (pt)
CN (1) CN109074938B (pt)
BR (1) BR112018071961B1 (pt)
CA (1) CA3022260C (pt)
DE (1) DE102016207405A1 (pt)
WO (1) WO2017186751A1 (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200343033A1 (en) 2018-01-15 2020-10-29 Siemens Aktiengesellschaft Transportable power transformer unit
DE102018200587A1 (de) 2018-01-15 2019-07-18 Siemens Aktiengesellschaft Kabeltrommel für ein Hochspannungskabel
DE102018201224A1 (de) * 2018-01-26 2019-08-01 Siemens Aktiengesellschaft Steckbare Hochspannungsdurchführung und elektrisches Gerät mit der steckbaren Hochspannungsdurchführung
DE102018201477A1 (de) * 2018-01-31 2019-08-01 Siemens Aktiengesellschaft Elektrisches Gerät mit Zwischenstück
DE102018211741A1 (de) * 2018-07-13 2020-01-16 Siemens Aktiengesellschaft Elektrische Steckeinrichtung und Anordnung mit einer elektrischen Steckeinrichtung

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DE1282170B (de) 1964-08-25 1968-11-07 Licentia Gmbh Abnehmbare Durchfuehrung fuer Hoechstspannungs-Transformatoren
US3621426A (en) 1970-11-12 1971-11-16 Westinghouse Electric Corp Transformer with bushing compartment
US3914467A (en) * 1971-06-22 1975-10-21 Matsushita Electric Ind Co Ltd Method of making resin encapsulated electric coil
US4298853A (en) * 1980-03-27 1981-11-03 General Electric Company Compact high voltage shunt reactor
JPS60154511A (ja) 1984-01-25 1985-08-14 Toshiba Corp 変圧器
US6696925B1 (en) * 2002-02-15 2004-02-24 Lynn-Edward Professional Services, Inc. Electrical revenue meter and instrument transformers mobile station
DE102007022641A1 (de) 2007-05-15 2008-11-20 Areva Energietechnik Gmbh Elektrischer Transformator
EP2431982B1 (de) * 2010-09-21 2014-11-26 ABB Technology AG Steckbare Durchführung und Hochspannungsanlage mit einer solchen Durchführung
EP2445321A1 (en) 2010-10-13 2012-04-25 Innovation & Infinity Global Corp. Conductive circuits for a touch panel and the manufacturing method thereof
EP2442321B1 (de) 2010-10-15 2012-12-05 ABB Technology AG Durchführung für Hochspannungsausleitungen in Öltransformatoren
CN201975241U (zh) * 2010-12-29 2011-09-14 天威云南变压器股份有限公司 油浸式变压器
JP5925443B2 (ja) * 2011-08-02 2016-05-25 株式会社東芝 静止誘導電気機器およびその製造方法
PL2850624T3 (pl) * 2012-05-14 2016-10-31 Transformator z pomieszczeniem dla izolatora przepustowego
US9601912B2 (en) * 2014-06-23 2017-03-21 Schneider Electric USA, Inc. Compact transformer bushing
CA3154851C (en) * 2014-10-24 2024-06-04 Abb Power Grids Switzerland Ag A hardened inductive device and systems and methods for protecting the inductive device from catastrophic events
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Also Published As

Publication number Publication date
WO2017186751A1 (de) 2017-11-02
EP3427276A1 (de) 2019-01-16
CA3022260C (en) 2021-02-16
CN109074938B (zh) 2023-04-07
BR112018071961B1 (pt) 2023-04-25
CN109074938A (zh) 2018-12-21
CA3022260A1 (en) 2017-11-02
US20170316862A1 (en) 2017-11-02
DE102016207405A1 (de) 2017-11-02
BR112018071961A2 (pt) 2019-02-05
US10685772B2 (en) 2020-06-16

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