EP3796346A1 - Bloc de compensation pour bobines à noyau d'air et transformateurs - Google Patents

Bloc de compensation pour bobines à noyau d'air et transformateurs Download PDF

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Publication number
EP3796346A1
EP3796346A1 EP19198956.5A EP19198956A EP3796346A1 EP 3796346 A1 EP3796346 A1 EP 3796346A1 EP 19198956 A EP19198956 A EP 19198956A EP 3796346 A1 EP3796346 A1 EP 3796346A1
Authority
EP
European Patent Office
Prior art keywords
block
compensating
air choke
choke coil
air
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.)
Pending
Application number
EP19198956.5A
Other languages
German (de)
English (en)
Inventor
Peter GRIEBLER
Klaus Pointner
Helmut Reisinger
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
Original Assignee
Siemens Energy Global GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Priority to EP19198956.5A priority Critical patent/EP3796346A1/fr
Priority to BR112022005367A priority patent/BR112022005367A2/pt
Priority to CN202080074476.3A priority patent/CN114631160A/zh
Priority to US17/762,818 priority patent/US20220344094A1/en
Priority to PCT/EP2020/074201 priority patent/WO2021058229A1/fr
Publication of EP3796346A1 publication Critical patent/EP3796346A1/fr
Pending legal-status Critical Current

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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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H01F37/005—Fixed inductances not covered by group H01F17/00 without magnetic core
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

Definitions

  • Dry-insulated air reactors are used, for example, in electrical systems for energy transmission and in power supply systems of industrial plants in order to protect these systems or to increase their performance.
  • current limiting chokes are used to limit short-circuit currents in areas of power networks which, due to their low network impedance, have very high short-circuit currents in the event of a fault, such as in substations in the area of multi-fed busbars.
  • the task of the series-connected current-limiting chokes is to limit the short-circuit power through the additional impedance in power networks so that circuit breakers can safely interrupt the short-circuit current in the event of a fault.
  • a typical air choke coil like the one in the WO 2009/126977 is described, has concentric winding layers, which are held at their upper and lower axial ends by a holding star, which is composed of several star-shaped, radially arranged arms, so-called star leaves.
  • a large number of individual star blades can be used, which are only located in the area below and above the winding layers, in order to save star blade material.
  • the opposing holding stars or star leaves are tensioned against one another with the aid of spacer strips or tension bandages running between the winding layers in order to hold the winding layers.
  • the star blades and spacer bars are used as winding aids at the same time by first clamping the lower star blades on a rotating device and then building the winding layers on top, with a set of spacer bars being mounted in between
  • the invention is therefore based on the object of improving the structure of air choke coils in such a way that the formation of gaps due to settlement can be reduced.
  • the current limiting choke according to Fig. 1 has concentrically arranged windings reinforced with glass fiber reinforced epoxy resin, of which only the outer winding layer is visible.
  • the windings are fixed by star holders, the arms of which extend in the radial direction from the coil axis beyond the radius of the outer winding.
  • a compensation block is now inserted between one winding end and an upper star arm of the air choke coil.
  • this compensation block has a sandwich structure with an upper block of insulating material, a lower block of insulating material and an elastomer block lying in between.
  • the star arms have a rectangular recess, the width of which corresponds to the width of the compensation blocks and the height of which corresponds to part of the height of the upper insulating material block of the compensation blocks.
  • the compensating blocks have a groove for receiving the section of the star arms above the rectangular recess.
  • This positive connection fixes the compensation blocks in their position and prevents them from slipping.
  • the tensioning device can consist, for example, of threaded pins which protrude through the sandwich structure of the compensating block and press the compensating blocks together by means of screws.
  • clamping devices based on clamps, riveted connections or with snap locks are also conceivable.
  • the preferred use of the compensating blocks according to the invention relates to air choke coils, but it is also possible for the windings of transformers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Insulating Of Coils (AREA)
EP19198956.5A 2019-09-23 2019-09-23 Bloc de compensation pour bobines à noyau d'air et transformateurs Pending EP3796346A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19198956.5A EP3796346A1 (fr) 2019-09-23 2019-09-23 Bloc de compensation pour bobines à noyau d'air et transformateurs
BR112022005367A BR112022005367A2 (pt) 2019-09-23 2020-08-31 Bloco de compensação para reatores e transformadores com núcleo de ar
CN202080074476.3A CN114631160A (zh) 2019-09-23 2020-08-31 用于空气扼流线圈和变压器的补偿块
US17/762,818 US20220344094A1 (en) 2019-09-23 2020-08-31 Compensation block for air-core reactors and transformers
PCT/EP2020/074201 WO2021058229A1 (fr) 2019-09-23 2020-08-31 Bloc de compensation pour inducteurs et transformateurs à noyau d'air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19198956.5A EP3796346A1 (fr) 2019-09-23 2019-09-23 Bloc de compensation pour bobines à noyau d'air et transformateurs

Publications (1)

Publication Number Publication Date
EP3796346A1 true EP3796346A1 (fr) 2021-03-24

Family

ID=68051708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19198956.5A Pending EP3796346A1 (fr) 2019-09-23 2019-09-23 Bloc de compensation pour bobines à noyau d'air et transformateurs

Country Status (5)

Country Link
US (1) US20220344094A1 (fr)
EP (1) EP3796346A1 (fr)
CN (1) CN114631160A (fr)
BR (1) BR112022005367A2 (fr)
WO (1) WO2021058229A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2934719A1 (de) * 1978-08-31 1980-03-13 Hitachi Ltd In vergussbauweise hergestellter transformator
EP0084412A1 (fr) * 1982-01-20 1983-07-27 TRENCH ELECTRIC, a Division of Guthrie Canadian Investments Limited Bobine de self, à noyau d'air avec croisillons à faibles pertes incorporés
DE20105608U1 (de) * 2001-03-27 2001-11-08 Siemens Ag Abstützvorrichtung für ein elektrisches Bauteil in Form einer Spule
DE102008010548A1 (de) * 2008-02-22 2009-08-27 Abb Technology Ag Zwei- oder mehrphasiger Transformator
WO2009126977A1 (fr) 2008-04-18 2009-10-22 Trench Austria Gmbh Blindage électrostatique pour composant pour transmission d'électricité en courant continu haute tension
EP2973621A1 (fr) 2013-03-15 2016-01-20 Trench Austria GmbH Système d'égalisation du pas des couches d'enroulements d'une bobine de self à air

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2934719A1 (de) * 1978-08-31 1980-03-13 Hitachi Ltd In vergussbauweise hergestellter transformator
EP0084412A1 (fr) * 1982-01-20 1983-07-27 TRENCH ELECTRIC, a Division of Guthrie Canadian Investments Limited Bobine de self, à noyau d'air avec croisillons à faibles pertes incorporés
DE20105608U1 (de) * 2001-03-27 2001-11-08 Siemens Ag Abstützvorrichtung für ein elektrisches Bauteil in Form einer Spule
DE102008010548A1 (de) * 2008-02-22 2009-08-27 Abb Technology Ag Zwei- oder mehrphasiger Transformator
WO2009126977A1 (fr) 2008-04-18 2009-10-22 Trench Austria Gmbh Blindage électrostatique pour composant pour transmission d'électricité en courant continu haute tension
EP2973621A1 (fr) 2013-03-15 2016-01-20 Trench Austria GmbH Système d'égalisation du pas des couches d'enroulements d'une bobine de self à air

Also Published As

Publication number Publication date
BR112022005367A2 (pt) 2022-06-14
CN114631160A (zh) 2022-06-14
WO2021058229A1 (fr) 2021-04-01
US20220344094A1 (en) 2022-10-27

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