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EP3172817A1 - Système anti-effluves pour machine électrique - Google Patents

Système anti-effluves pour machine électrique

Info

Publication number
EP3172817A1
EP3172817A1 EP15748019.5A EP15748019A EP3172817A1 EP 3172817 A1 EP3172817 A1 EP 3172817A1 EP 15748019 A EP15748019 A EP 15748019A EP 3172817 A1 EP3172817 A1 EP 3172817A1
Authority
EP
European Patent Office
Prior art keywords
corona
protection system
electrical
corona shielding
electrical machine
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
Application number
EP15748019.5A
Other languages
German (de)
English (en)
Inventor
Bernhard Klaussner
Jiri Lang
Steffen Lang
Alexander Litinsky
Guido Schmidt
Christian SCHULZ-DROST
Klaus Schäfer
Christian Staubach
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 AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP3172817A1 publication Critical patent/EP3172817A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges

Definitions

  • Corona protection system for an electric machine The invention relates to a corona protection system for an electrical machine with external corona protection and end corona protection.
  • the electrical machine is a high voltage machine, preferably a generator for the generation ⁇ supply of electrical energy and / or an electric motor and / or other electrical equipment with a higher rated voltage, such as in particular a transformer, a bushing or cable.
  • a powerful generator such as a turbogenerator, in particular has a stator (stator) with a (stator) laminated core and a plurality of generator grooves in which the generator winding is located on.
  • the main insulation of this generator winding against the laminated core is an electrically highly stressed system.
  • high voltages are generated which must be dissipated in the insulating volume between the conductor bar at high voltage and the laminated core lying at ground potential.
  • At the edges of the sheets in the laminated core thereby field overshoots, which in turn cause partial discharges. These partial discharges lead locally to very strong heating when hitting the insulation system.
  • the organic materials of the insulation system including the materials of the external corona protection system, are successively decomposed into low-modulus, volatile products, for example in carbon dioxide.
  • outer corona ⁇ An important part of Isolationssytems is the so-called outer corona ⁇ (AGS). It is with larger generators and electric motors ⁇ ren directly onto the surface of the generations Torwicklungsisolation applied.
  • the outer corona environmentally currently holds carbon black and graphite-containing tapes or La ⁇ bridge.
  • the external corona protection must have a certain square resistance, which lies in a certain range. If it is too low, the laminated cores can be electrically short-circuited, which can lead to high induced circulating currents, which close over the ends of the laminated core and the outer corona protection and lead to high-current arcs. If the resistance is too high, high-voltage spark erosion may occur.
  • a capacitive-resistive field control is used to reduce the field strength increase in the area of the end of the glow plug.
  • the capacitive control is bewerkstel ⁇ ligt through the insulating materials of the insulating system, while the resistive protection control by the Endenglimm- (EGS) is accomplished.
  • EGS Endenglimm-
  • the surface coverings typically have a quadratic electrical resistance of approximately 10 to 10 ohms.
  • the Glimmschutzsystem invention is a Glimmschutzsystem, which is advantageously for an electric Ma ⁇ machine, preferably an alternator for generating electrical energy and / or electric motor and / or other electrical equipment with a higher loading ⁇ rated voltage as in particular a transformer, a bushing or a cable is formed.
  • the corona protection system according to the invention has an outer corona protection and an end corona protection.
  • both the outer corona shielding and the end corona shielding are formed with the same corona shielding material which has a nonlinear field strength-dependent electrical resistance.
  • the non-linear field strength-dependent electrical resistance corona discharge material is a partial discharge resistant EGS band, as is known in particular from the published patent application DE 10 2010 009462 AI.
  • this EGS-band over the entire length of the nal ⁇ for AGS and EGS is applied to a main insulation of a stator winding of the electrical machine, wound around the main insulation in particular.
  • the EGS band usually has a non-linear electrical abutment ⁇ was characteristic to enable efficient potential control at the end of the outer corona.
  • t is the electrical resistance in a Häbe ⁇ ranging from 0.1 to 0.3 kV / mm 10 4 to 10 7 Gm.
  • the EGS band Due to the out ⁇ shaped nonlinear field strength-dependent electrical resistance of the EGS band can this use also in the groove area of the stator winding.
  • the radial field strength above the main insulation of the stator winding is up to approximately 3 kV / mm, depending on a position of the stator winding within the laminated core.
  • the EGS band thus is highly conductive at high loading ⁇ operating field strengths and thus close the phase connections and acts as an additional AGS location.
  • the EGS band is very high resistance and acts as an additional insulating layer.
  • the EGS material may also be formed as EGS lacquer instead of an EGS tape.
  • the corona protection system according to the invention is consequently particularly easy to form. In particular, by means of the same
  • the inventive glow ⁇ protection system is particularly simple design therefore.
  • a particularly close electrical connection between end corona protection and external corona protection is realized.
  • an AGS-Leitvlieslage is formed together with the Endenglimmtik.
  • external corona shielding, at least in part, and end corona shielding, at least in part, are made of the same
  • Corona protection material formed formed. Especially in this development, a particularly simple production and a particularly close electrical coupling of admirglimmschutz and Endenglimm- protection is ensured.
  • ⁇ OF INVENTION Glimmschutzsystem to the invention is expediently at least a portion of the outer corona and at least a portion of the end corona shielding formed with an EGS tape and / or with an EGS paint as described above.
  • the Glimmschutzsystems Glimmschutzmaterial at a more lower electrical resistance, the stronger electrical equipment box of the electrical machine, be ⁇ is insensitive in wel ⁇ chem the Glimmtikmaterial, in particular during operation.
  • the electrical resistance of the corona shielding material in the region of the external corona protection is sufficiently low in order to avoid or reduce potential peaks along the length of a conductor rod of the stator winding.
  • the electrical resistance of the corona shielding material is sufficiently high, so that the corona shielding material forms an additional insulating layer which effectively reduces or avoids potential peaks in this area.
  • the Glimmschutzmaterial on a matrix and an intra ⁇ half of the matrix arranged filler.
  • the matrix is expediently a polymeric matrix, in particular a plastic matrix and / or resin.
  • the polymeric matrix is a thermoplastic and / or a doromer and / or an elastomer.
  • the filler comprises partially charge-resistant and electrically conductive particles.
  • the particles comprise a partial charge-resistant core and a partial charge-resistant coating that is conductive.
  • globular particles are to be understood as meaning those particles in which the dimensions in different spatial directions differ by less than a factor of at most 3, expediently at most 1.5.
  • ⁇ purpose advantageously understood to mean those particles below planar particles whose dimension, at least one spatial direction by a factor of at least 3, preferably at least 5, of the dimensions in one, preferably in two different mutually perpendicular directions.
  • the filler is advantageously formed with mica.
  • the matrix has glass fibers.
  • at least part of the glow protection system forms
  • Corona protection material a tape and / or a varnish.
  • the electrical machine according to the invention has a glow protection system as described above.
  • the electric machine is a high voltage machine.
  • the electric machine is a generator for generating electrical energy and / or an electric motor and / or other electrical equipment with a higher rated voltage such as in particular a transformer, a bushing or a cable.
  • the glowproofing material is arranged, at least in part, on a main insulation of the electrical machine.
  • the main insulation is expediently arranged on a conductor bar and / or on a stator winding of the electrical machine.
  • the electrical machine according to the invention has at least one conductor bar and a corona shielding system as described above, the corona shielding material of the glow shielding system being applied at least partially to the or at least one of the conductor bars and / or its electrical insulation or to the winding bar or at least at least one of the conductor bars and / or its / its electrical insulation is arranged

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

L'invention concerne un système anti-effluves pour une machine électrique, qui comprend une protection anti-effluves extérieure et une protection anti-effluves d'extrémité. La protection anti-effluves extérieure et la protection anti-effluves d'extrémité se composent l'une comme l'autre du même matériau anti-effluves,qui présente une résistance électrique dépendant non linéairement de l'intensité de champ. Ladite machine électrique présente un tel système de protection anti-effluves.
EP15748019.5A 2014-09-25 2015-08-03 Système anti-effluves pour machine électrique Ceased EP3172817A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014219439.3A DE102014219439A1 (de) 2014-09-25 2014-09-25 Glimmschutzsystem für eine elektrische Maschine
PCT/EP2015/067785 WO2016045844A1 (fr) 2014-09-25 2015-08-03 Système anti-effluves pour machine électrique

Publications (1)

Publication Number Publication Date
EP3172817A1 true EP3172817A1 (fr) 2017-05-31

Family

ID=53794214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15748019.5A Ceased EP3172817A1 (fr) 2014-09-25 2015-08-03 Système anti-effluves pour machine électrique

Country Status (7)

Country Link
US (1) US11081923B2 (fr)
EP (1) EP3172817A1 (fr)
JP (1) JP2017536791A (fr)
CN (1) CN106716788B (fr)
DE (1) DE102014219439A1 (fr)
RU (1) RU2686680C2 (fr)
WO (1) WO2016045844A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3240150A1 (fr) * 2016-04-25 2017-11-01 Siemens Aktiengesellschaft Machine electrique et procede de demontage et de production d'une machine electrique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011083214A1 (de) * 2011-09-22 2013-03-28 Siemens Aktiengesellschaft Elektrische Leitungseinrichtung, Endenglimmschutzanordnung und Verfahren zum Herstellen eines Endenglimmschutzes

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JPS5759306A (en) 1980-09-27 1982-04-09 Hitachi Ltd Electrically insulated coil
JPS6122733A (ja) * 1984-07-09 1986-01-31 Toshiba Corp 高圧回転電機コイル
DE4218927A1 (de) 1992-06-10 1993-12-16 Asea Brown Boveri Hochspannungsisolation für Statorwicklungen elektrischer Maschinen
DE4218928A1 (de) 1992-06-10 1993-12-16 Asea Brown Boveri Glimmschutzanordnung für die Statorwicklung einer elektrischen Maschine
DE4218969A1 (de) 1992-06-10 1993-12-16 Asea Brown Boveri Verfahren zur Fixierung von Wickelköpfen elektrischer Maschinen und Mittel zur Durchführung des Verfahrens
JPH06217484A (ja) 1993-01-19 1994-08-05 Toshiba Corp 絶縁コイル
RU2088024C1 (ru) 1993-07-07 1997-08-20 Акционерное общество открытого типа "Электросила" Стержень обмотки статора высоковольтной электрической машины
JP3548655B2 (ja) 1996-10-09 2004-07-28 株式会社東芝 高電圧機器
DE19822137A1 (de) * 1998-05-16 1999-11-18 Asea Brown Boveri Hochspannungsisolierte Statorwicklung
US6242825B1 (en) 1998-11-25 2001-06-05 Hitachi, Ltd. Electric rotating machine with reduced thickness and volume of insulation
CN1338141A (zh) 1999-01-18 2002-02-27 西门子公司 导电体,涡轮发电机以及用于为一个导电体建立外部辉光放电保护的方法
SE0003037D0 (sv) * 2000-08-29 2000-08-29 Abb Ab Elektrisk maskin
CA2344564C (fr) 2000-09-14 2008-07-22 General Electric Canada Inc. Ensemble isolant de champs electriques a effet progressif, pour machine dynamo-electrique
RU2291542C2 (ru) 2001-05-03 2007-01-10 Дженерал Электрик Кэнада Инк. Система изоляции со ступенчатым электрическим полем для динамоэлектрической машины
JP4420274B2 (ja) 2003-09-04 2010-02-24 シチズンホールディングス株式会社 時計用表示板
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DE102011083228A1 (de) 2011-09-22 2013-03-28 Siemens Aktiengesellschaft Isoliersysteme mit verbesserter Teilentladungsbeständigkeit, Verfahren zur Herstellung dazu
EP2582018A1 (fr) * 2011-10-14 2013-04-17 Siemens Aktiengesellschaft Stator d'une machine électrique doté d'une protection contre l'effet de couronne passante
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Also Published As

Publication number Publication date
DE102014219439A1 (de) 2016-03-31
RU2017113770A3 (fr) 2018-10-25
RU2686680C2 (ru) 2019-04-30
US11081923B2 (en) 2021-08-03
CN106716788B (zh) 2020-07-10
US20170294817A1 (en) 2017-10-12
WO2016045844A1 (fr) 2016-03-31
JP2017536791A (ja) 2017-12-07
CN106716788A (zh) 2017-05-24
RU2017113770A (ru) 2018-10-25

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