EP0315835B1 - Transformateur de tension à haute tension - Google Patents

Transformateur de tension à haute tension Download PDF

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Publication number
EP0315835B1
EP0315835B1 EP88117960A EP88117960A EP0315835B1 EP 0315835 B1 EP0315835 B1 EP 0315835B1 EP 88117960 A EP88117960 A EP 88117960A EP 88117960 A EP88117960 A EP 88117960A EP 0315835 B1 EP0315835 B1 EP 0315835B1
Authority
EP
European Patent Office
Prior art keywords
voltage
winding
low
electrode
metal screen
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.)
Expired - Lifetime
Application number
EP88117960A
Other languages
German (de)
English (en)
Other versions
EP0315835A1 (fr
Inventor
Norbert Dipl.-Ing. Fh Preissinger
Hermann Dipl.-Ing. Fh Eberlein
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.)
Trench Germany GmbH
Original Assignee
MWB Messwandler Bau 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 MWB Messwandler Bau AG filed Critical MWB Messwandler Bau AG
Priority to AT88117960T priority Critical patent/ATE85725T1/de
Publication of EP0315835A1 publication Critical patent/EP0315835A1/fr
Application granted granted Critical
Publication of EP0315835B1 publication Critical patent/EP0315835B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/24—Voltage transformers
    • H01F38/26—Constructions

Definitions

  • the present invention relates to a high-voltage voltage converter, in particular a combined high-voltage current and voltage converter in a head design, according to the preambles of claims 1 and 8.
  • Such high-voltage converters are known per se.
  • it is customary to mount the active parts of the converter consisting of core, high and low voltage winding on an insulating column and to surround them with a head housing.
  • the insulating column is attached to a foot section that supports the terminal box with the terminal board for the converter's rejects.
  • the secondary leads from the converter head housing to the terminal board are therefore relatively long. This applies in particular to combined high-voltage current and voltage transformers in the design according to the own DE-A-36 08 390.9, in which the voltage transformer is arranged above the current transformer.
  • the present invention ensures that a very large capacitance is formed between the metal shield of the high voltage winding and the lead electrode of the voltage converter.
  • the lead electrode is electrically connected to the outer shield electrode in the shortest possible way and therefore with very little inductance. This reliably prevents the metal shield of the high-voltage winding from rising to impermissibly high values and prevents impermissibly high transient overvoltages from being coupled into the low-voltage winding.
  • a combined high-voltage current and voltage converter is shown. It consists of a base part 1 with a terminal box 3 containing a terminal board 2. On the base part 1, a support insulator 4 is arranged tightly and firmly, which carries a metal end plate 5 at the top. On the latter is a U-shaped primary conductor 6 with the legs 7, 8 and the base 9 attached, one leg 8 is electrically conductively connected to the end plate 5 and the other leg 7 is brought out in an electrically insulating manner and can be contacted from the outside.
  • the base 9 of the primary conductor 6 is surrounded concentrically by a secondary winding 10 with a plurality of cores.
  • the primary conductor 6 and secondary winding 10 form a high-voltage current transformer, the secondary leads of which are led to the terminal board 2.
  • the connections 11 of the legs 7, 8 and thus the end plate 5 are at high voltage potential.
  • a high-voltage voltage converter 12 is arranged above the high-voltage current transformer 6, 10. It is electrically connected, for example, to a connector 13 with the former, the outlets of the voltage converter 12 being arranged in the connector 13 and then - like the secondary outlets of the current converter 6, 10 - being guided to the terminal board 2.
  • the voltage converter 12 consists in a known manner of an iron core 15 made of magnetizable material.
  • the high-voltage winding 16 is applied around its one leg as a cylinder, step or trapezoidal winding. This is concentrically surrounded by a low-voltage winding 17.
  • These active parts of the entire voltage converter 12 are surrounded concentrically by an annular or cylindrical shielding electrode 18 which is at ground potential.
  • a pot-shaped one- or multi-part housing 19 is tightly and firmly attached, which surrounds both transducers 6, 10 and 12 together and is at high voltage potential.
  • FIG. 2 shows a section of the voltage converter of a combined high-voltage current and voltage converter in a head design according to FIG. 1.
  • this voltage converter can also be used without being combined with a current converter.
  • the last turn or turn position of the two-stage high-voltage winding 16 surrounding the iron core is provided with a slotted metal screen 20 which extends over its winding length.
  • the latter consists of a layer of highly electrically conductive material, for example copper, silver or zinc, or of a metal covering in the form of a metal foil or a metal cylinder.
  • the metal screen 20 is slotted in a manner known per se in the direction of the longitudinal axis W of the winding in order to prevent the occurrence of short-circuit currents.
  • a lead 21 is electrically connected to the metal screen 20 and leads to the terminal X for the high-voltage winding 16 in the terminal board 2.
  • a concentrically surrounding discharge electrode 22 which forms a large capacitance with the metal screen 20.
  • the space provided by the distance A is partially or completely filled with insulating tapes or foils, these being impregnated with the insulating gas or a liquid insulating medium of the present gas- or oil-insulated combined high-voltage current and voltage converter. It is sufficient to attach only a few insulation layers, for example 4 to 6 insulation layers with an insulation tape or insulation film thickness of 40 to 80 ⁇ , which results in a total distance A of 160 to 360 ⁇ . However, several insulating layers up to a maximum distance A of approximately 5 mm can also be provided.
  • the lead-off electrode 22 consists of an electrically conductive layer, in particular a metal layer or a metallic cylinder or a metal foil or steps thereof. When using metallic cylinder or metal foil electrodes, these can be glued and / or bandaged, for example by means of an insulating bandage winding.
  • the coaxial low-voltage winding 17 is arranged above the discharge electrode 22 at a relatively large distance B, which is primarily determined by the necessary fastening and support elements 24. This is provided with a grounded metallic shield 25, which preferably surrounds the low-voltage winding 17 on all sides, but whose cylindrical parts are also slotted in the direction of the longitudinal axis W of the low-voltage winding 17 and in the circumferential direction in order to prevent short-circuit currents.
  • the shield 25 of the low-voltage winding 17 is electrically conductively connected to the shielding electrode 18, which is connected to earth potential, via a, preferably a plurality of connecting brackets 26 distributed over the circumference, with little inductance.
  • the discharge electrode 22 is also connected to the shielding electrode 18 via at least one, but preferably via a plurality of short, as wide as possible connecting lines 27 distributed around the circumference.
  • the connection should be as inductive as possible, so it must be as short as possible.
  • the secondary outlets 28, 29 of the low-voltage winding 17 are like the outlet 21 for the metal screen 20 led to the terminal board 2. This can be done together while maintaining an insulation level of 3 kV within the discharge pipe.
  • the risk of breakdowns in the case of transient, high-frequency processes as a result of coupling in to high potential to the terminals in the terminal box 3 is effectively excluded by the measures according to the invention.
  • FIG. 3 which shows a modification of the high-voltage voltage converter according to FIG. 2, the same parts are identified with the same reference numbers as in FIG. 2.
  • the metal shield 20 of the high-voltage winding 16 is electrically conductively contacted by means of electrically conductive connection elements 20 b distributed over the circumference of the high-voltage winding 16 with at least one further metallic coating 20 a on the support body 30 of the low-voltage winding 17 and by means of the lead 21 connected to the terminal X for the high-voltage winding 16. Details can be found in particular in FIGS. 4 and 5.
  • the electrical insulation between the metallic coating 20 a or between the metallic coatings 20 a and the discharge electrode (s) 22 a preferably corresponds to the embodiment as was described in more detail in FIG. 2. Even in the embodiment According to FIG. 3, the lead electrode or lead electrodes 22 a are connected in an electrically conductive manner to the shielding electrode 18 via one or more connecting leads 27 a in the shortest way, that is to say with little inductance.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Coils Or Transformers For Communication (AREA)

Claims (8)

  1. Transformateur de tension à haute tension notamment transformateur combiné de tension et de courant à haute tension, à construction en tête, avec un noyau (15) auquel est appliquée la haute tension, et qui est entouré coaxialement par un enroulement de haute tension (16) muni d'un écran métallique (20), fendu, ainsi que d'un enroulement basse tension (17) entourant également de manière coaxiale ce noyau, ainsi qu'une électrode formant écran (18) coaxial, mise à la masse, et qui entoure l'enroulement de haute tension et de basse tension, transformateur caractérisé en ce que :
    - l'écran métallique (20) est relié par la conduite de sortie (21) à la borne de raccordement (X) de l'enroulement de haute tension (16),
    - à faible distance (A) allant au maximum jusqu'à 5 mm, de l'écran métallique (20), il y a une électrode de dérivation (22) entourant l'écran de manière concentrique, cette électrode étant isolée électriquement par rapport à l'écran métallique (20),
    - l'électrode de dérivation (22) est reliée de manière électrique par une ou plusieurs lignes de branchement (27), suivant le chemin le plus court, c'est-à-dire à faible inductivité, avec l'électrode (18) formant écran :
    - l'enroulement basse tension (17) est également muni d'un écran (25) métallique usuellement fendu, cet écran étant lui-même relié de manière électriquement conductrice avec faible inductivité à l'électrode (18) formant écran.
  2. Transformateur de tension à haute tension selon la revendication 1, caractérisé en ce que la distance (A) entre l'écran métallique (20) et l'électrode de dérivation (22) est formée en totalité ou en partie par plusieurs couches d'un matériau isolant (23) en forme de ruban ou de feuille.
  3. Transformateur de tension de haute tension selon la revendication 1 ou 2, caractérisé en ce que l'électrode de dérivation (22) se compose d'une couche conductrice appliquée sur un corps isolant et qui est coupée dans la direction de l'axe de l'enroulement (W).
  4. Transformateur de tension de haute tension selon la revendication 1 ou 2, caractérisé en ce que l'électrode de dérivation (22) se compose d'un cylindre métallique destiné à être emmanché sur le matériau isolant (23), ce cylindre étant fendu suivant la direction de l'axe (W) de l'enroulement.
  5. Transformateur de tension de haute tension selon la revendication 4, caractérisé en ce que le cylindre métallique est collé sur le matériau isolant (23) et/ou fixé par un enroulement en forme de bandage isolant, extérieur sur le matériau isolant (23) de l'écran métallique (20).
  6. Transformateur de tension de haut tension selon l'une des revendications 1 à 5, caractérisé en ce que la conduite de sortie (21) pour la borne de branchement (X) de l'enroulement de haute tension (16) isolé par rapport au boîtier (19) et aux conduites de sortie (28, 29) de l'enroulement de basse tension (17) pour être conduites à une plaque à bornes (2) commune.
  7. Transformateur de tension de haute tension selon l'une des revendications 1 à 6, caractérisé en ce qu'il est sous la pression d'un gaz isolant.
  8. Transformateur de tension de haute tension notamment transformateur de tension et de courant de haute tension du type à tête, avec un noyau (15) soumis à la haute tension, qui est entouré coaxialement par un enroulement de haute tension (16) muni d'un écran métallique (20), fendu et un enroulement basse tension (17) entourant également de manière coaxiale ce noyau ainsi qu'une électrode d'écran (18), coaxiale, mise à la masse et entourant l'enroulement de haute tension et de basse tension, transformateur caractérisé en ce que :
    - l'écran métallique de l'enroulement de haute tension (16) est en contact électrique avec au moins un autre revêtement métallique (20a) sur le corps de support (30) de l'enroulement basse tension (17) et est relié par la ligne de sortie (21) à la borne de raccordement (X) de l'enroulement haute tension (16);
    - au moins une électrode de dérivation (22a) est montée de manière électriquement isolée, à une faible distance (A) allant au maximum jusqu'à 5 mm d'au moins l'un des autres revêtements métalliques (20a) sur l'enroulement basse tension (17) et entoure celle-ci de façon concentrique,
    - la ou les électrodes de dérivation (22a) est reliée par une ou plusieurs lignes de branchement (27a) suivant le chemin le plus court, c'est-à-dire à faible inductance, à l'électrode formant écran (18) par une liaison électrique.
EP88117960A 1987-11-09 1988-10-28 Transformateur de tension à haute tension Expired - Lifetime EP0315835B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88117960T ATE85725T1 (de) 1987-11-09 1988-10-28 Hochspannungsspannungswandler.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3737989 1987-11-09
DE3737989A DE3737989C1 (de) 1987-11-09 1987-11-09 Hochspannungsspannungswandler

Publications (2)

Publication Number Publication Date
EP0315835A1 EP0315835A1 (fr) 1989-05-17
EP0315835B1 true EP0315835B1 (fr) 1993-02-10

Family

ID=6340108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117960A Expired - Lifetime EP0315835B1 (fr) 1987-11-09 1988-10-28 Transformateur de tension à haute tension

Country Status (20)

Country Link
US (1) US4845453A (fr)
EP (1) EP0315835B1 (fr)
JP (1) JP2693188B2 (fr)
KR (1) KR0127019B1 (fr)
CN (1) CN1020018C (fr)
AR (1) AR244019A1 (fr)
AT (1) ATE85725T1 (fr)
AU (1) AU601135B2 (fr)
BR (1) BR8805790A (fr)
CA (1) CA1303693C (fr)
DD (1) DD283474A5 (fr)
DE (2) DE3737989C1 (fr)
ES (1) ES2040308T3 (fr)
HU (1) HU200029B (fr)
IN (1) IN171971B (fr)
RU (1) RU2046427C1 (fr)
TR (1) TR24104A (fr)
UA (1) UA25892A1 (fr)
YU (1) YU47634B (fr)
ZA (1) ZA888251B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR8700893A (pt) * 1986-03-13 1987-12-22 Messwandler Bau Ag Transformador combinado de alta tensao e de corrente de alta tensao
DE3737989C1 (de) * 1987-11-09 1989-05-11 Messwandler Bau Ag Hochspannungsspannungswandler
CH682190A5 (fr) * 1991-04-22 1993-07-30 Asea Brown Boveri
JPH0992127A (ja) * 1995-09-19 1997-04-04 Hitachi Ltd 漏電遮断器
US8005314B2 (en) * 2005-12-09 2011-08-23 Amnis Corporation Extended depth of field imaging for high speed object analysis
WO2010061399A1 (fr) * 2008-11-27 2010-06-03 Areva T&D India Ltd. Transformateur de courant
CN101982858A (zh) * 2010-10-13 2011-03-02 中国人民解放军国防科学技术大学 磁浮列车用电抗器
CN102737828B (zh) * 2011-04-13 2015-08-26 华东电力试验研究院有限公司 带暂态过电压监测单元的电容式电压互感器
CN104576006B (zh) * 2015-01-08 2016-09-28 大连第二互感器集团有限公司 一种能减少局部放电的电流互感器及其制造方法
DE102015216860A1 (de) * 2015-09-03 2017-03-09 Siemens Aktiengesellschaft Felgenelektrode und Wicklungsanordnung eines Messwandlers
DE102016216499B4 (de) * 2016-09-01 2018-04-19 Siemens Aktiengesellschaft Spannungswandlereinheit mit einem Aktivteilgehäuse
PL3559963T3 (pl) * 2016-12-21 2022-02-07 Abb Power Grids Switzerland Ag Zespolony transformator miernikowy prądowy i napięciowy do zastosowań wysokiego napięcia

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699987C (de) * 1934-09-30 1940-12-11 Aeg Hochspannungstransformator, insbesondere Spannungswandler
US2170048A (en) * 1935-03-20 1939-08-22 Edison Inc Thomas A Coupled circuit system
US3028569A (en) * 1959-08-31 1962-04-03 Gen Electric Open core potential transformer
DE1227140B (de) * 1962-09-26 1966-10-20 Siemens Ag Spannungswandler mit einem Stabkern
US3173115A (en) * 1962-10-26 1965-03-09 Westinghouse Electric Corp High voltage potential transformer
US3699488A (en) * 1972-02-28 1972-10-17 Allis Chalmers Distribution transformer having static shield
DE2452056B2 (de) * 1974-11-02 1978-02-09 Messwandler-Bau Gmbh, 8600 Bamberg Induktiver spannungswandler fuer eine mittels isoliergas vollisolierte, metallgekapselte hochspannungsschaltanlage
DE3608390A1 (de) * 1986-03-13 1987-09-17 Messwandler Bau Ag Kombinierter hochspannungsstrom- und -spannungswandler
BR8700893A (pt) * 1986-03-13 1987-12-22 Messwandler Bau Ag Transformador combinado de alta tensao e de corrente de alta tensao
DE3737989C1 (de) * 1987-11-09 1989-05-11 Messwandler Bau Ag Hochspannungsspannungswandler

Also Published As

Publication number Publication date
BR8805790A (pt) 1989-08-01
US4845453A (en) 1989-07-04
UA25892A1 (uk) 1999-02-26
JP2693188B2 (ja) 1997-12-24
DE3737989C1 (de) 1989-05-11
CA1303693C (fr) 1992-06-16
DD283474A5 (de) 1990-10-10
EP0315835A1 (fr) 1989-05-17
YU201588A (en) 1991-02-28
AR244019A1 (es) 1993-09-30
JPH01258405A (ja) 1989-10-16
RU2046427C1 (ru) 1995-10-20
AU2479788A (en) 1989-05-11
AU601135B2 (en) 1990-08-30
HU200029B (en) 1990-03-28
CN1020018C (zh) 1993-03-03
ES2040308T3 (es) 1993-10-16
CN1036477A (zh) 1989-10-18
KR890008865A (ko) 1989-07-12
KR0127019B1 (ko) 1998-04-02
ZA888251B (en) 1989-08-30
DE3878404D1 (de) 1993-03-25
IN171971B (fr) 1993-02-27
TR24104A (tr) 1991-03-18
ATE85725T1 (de) 1993-02-15
HUT49746A (en) 1989-10-30
YU47634B (sh) 1995-12-04

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