EP0141296B1 - Dispositif de connexions pour transformateurs de grande puissance - Google Patents

Dispositif de connexions pour transformateurs de grande puissance Download PDF

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Publication number
EP0141296B1
EP0141296B1 EP84112034A EP84112034A EP0141296B1 EP 0141296 B1 EP0141296 B1 EP 0141296B1 EP 84112034 A EP84112034 A EP 84112034A EP 84112034 A EP84112034 A EP 84112034A EP 0141296 B1 EP0141296 B1 EP 0141296B1
Authority
EP
European Patent Office
Prior art keywords
winding
circuit arrangement
capacitor
point
step winding
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
Application number
EP84112034A
Other languages
German (de)
English (en)
Other versions
EP0141296A1 (fr
Inventor
Werner Dr. Dipl.-Ing. Stein
Walter Dr. Dipl.-Ing. Müller
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.)
Transformatoren Union AG
Original Assignee
Transformatoren Union AG
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 Transformatoren Union AG, Siemens AG filed Critical Transformatoren Union AG
Priority to AT84112034T priority Critical patent/ATE29333T1/de
Publication of EP0141296A1 publication Critical patent/EP0141296A1/fr
Application granted granted Critical
Publication of EP0141296B1 publication Critical patent/EP0141296B1/fr
Expired 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
    • H01F27/343—Preventing or reducing surge voltages; oscillations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings

Definitions

  • the invention relates to a circuit arrangement for large power transformers with an undervoltage, a high-voltage master and a step winding in connection and counter-connection, with an RC element for the step winding and with a star-point step switching device, the step winding consisting for example of two electrically parallel, center-symmetrical parts , and goes z. B. from DE-A-21 17 522.
  • Windings of transformers have certain natural resonance frequencies.
  • a vibrating switching voltage applied from the outside can, if the frequency matches, excite these natural vibrations and lead to very high internal stresses for the insulation of the winding.
  • the vibrations with the natural frequency of the step winding can be particularly unpleasant.
  • These voltage vibrations also influence the end of the main winding in certain positions of the tap changer, especially in counter-switching, and also lead to voltage increases here and thereby endanger the insulation.
  • the invention is therefore based on the object of providing an arrangement for the harmless absorption of overvoltages originating from oscillating switching voltages by transformer windings, without forcing an enlargement of the transformer core window, and at the same time restricting the remaining space requirements to the bare minimum.
  • this object is achieved for a circuit arrangement specified at the outset by the combination of features specified in the characterizing part of claim 1.
  • a very advantageous embodiment of the invention consists in that the capacitor is constructed from the individual stages of partial capacitors connected in parallel and electrically in series with one another and thereby effectively dampens the natural frequencies of a higher atomic number of the stage winding.
  • the circuit arrangement according to the invention is very advantageous because it ensures optimum protection of the step winding against oscillating switching impulse voltages.
  • additional damping is advantageously achieved without the winding losses being measurably increased at the operating frequency.
  • the step winding 14 is composed of two electrically parallel parts which are arranged spatially symmetrically to a center input (1).
  • Levels 1 to 10 can be selected by contact arms 15 of a selector 16 and one of the contact arms 15 is connected to the star point of the transformer by an uninterrupted switching load switch 17.
  • the center input and the ends of the step winding 14 are connected to fixed contacts in a turner 18, the movable contact of which is at the low-voltage end of the high-voltage main winding 13.
  • the voltages of the windings 13 and 14 are added in the switching position of the inverter 18 shown in dashed lines and subtracted in the switching position shown in solid lines.
  • a capacitor 19 is now connected between the center connection of the step winding 14 and the star point of the transformer, which greatly reduces the capacitively transmitted voltage.
  • a damping resistor 20 is connected upstream of the capacitor 19 in order to dampen its charging currents and to reduce the quality factor.
  • FIG. 2 shows an arrangement in which the capacitor is divided into partial capacitors 21.
  • the use of a capacitor bank made up of partial capacitors 21 also enables the production of the same from double-coiled coils from a strip conductor made of a resistance alloy. Additional damping of the step winding 14 is thus possible without measurably increasing the losses occurring at the operating frequency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Power Conversion In General (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (4)

1. Montage pour des transformateurs de puissance avec un enroulement réel basse tension (12), un enroulement réel haute tension (13) et un enroulement en gradins (14) en montage série et en opposition, avec un circuit RC pour l'enroulement en gradins, ainsi qu'avec un dispositif à commutation en gradins (15, 16, 17), caractérisé par le fait
qu'entre le point de raccordement médian (1) de l'enroulement en gradins (14) associé à l'enroulement réel haute tension (13) et le point neutre du transformateur, il est prévu, électriquement en parallèle sur les gradins de l'enroulement en gradins (14), montés en opposition pour le passage du courant, un condensateur (19) en série avec une résistance (20);
que le condensateur (19) et la résistance (20) réduisent, du fait de leur dimensionnement, considérablement les amplitudes de résonance du point de branchement médian (14) par rapport à la terre; et
que le condensateur (19 ou 21) est constitué par des conducteurs plats enroulés en spirale et fait avec un alliage résistif qui, par sa constitution, contribue également à réduire les amplitudes de résonance du point de raccordement médian (1).
2. Montage selon la revendication 1, caractérisé par le fait que le condensateur est subdivisé en des condensateurs partiels (21) montés en parallèle entre les différents gradins (1-10) de l'enroulement en gradins (14), et reliés en série entre eux.
3. Montage selon la revendication 2, caractérisé par le fait que les capacités des condensateurs partiels (21) sont égales entre elles.
4. Montage selon la revendication 2 ou 3, caractérisé par le fait que tous les condensateurs partiels (21) associés à une même phase d'un transformateur polyphasé, sont rassemblés en un groupe de construction particulier, de la forme d'une colonne et séparé de l'enroulement à gradins (14).
EP84112034A 1983-10-20 1984-10-08 Dispositif de connexions pour transformateurs de grande puissance Expired EP0141296B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112034T ATE29333T1 (de) 1983-10-20 1984-10-08 Schaltungsanordnung fuer leistungsgrosstransformatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833338149 DE3338149A1 (de) 1983-10-20 1983-10-20 Schaltungsanordnung fuer leistungsgrosstransformatoren
DE3338149 1983-10-20

Publications (2)

Publication Number Publication Date
EP0141296A1 EP0141296A1 (fr) 1985-05-15
EP0141296B1 true EP0141296B1 (fr) 1987-09-02

Family

ID=6212335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112034A Expired EP0141296B1 (fr) 1983-10-20 1984-10-08 Dispositif de connexions pour transformateurs de grande puissance

Country Status (7)

Country Link
US (1) US4678927A (fr)
EP (1) EP0141296B1 (fr)
JP (1) JPS60107812A (fr)
AT (1) ATE29333T1 (fr)
BR (1) BR8405289A (fr)
CA (1) CA1239189A (fr)
DE (2) DE3338149A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2020972B3 (es) * 1986-07-30 1991-10-16 Siemens Ag Colocacion de interruptor para transformadores grandes de potencia.
DE3908841A1 (de) * 1989-03-17 1990-09-20 Siemens Ag Anordnung zur daempfung hochfrequenter schwingungen einer elektrischen spannung
US5798876A (en) * 1995-02-09 1998-08-25 Canon Kabushiki Kaisha Lens barrel with peripheral parts of first and second lenses in contact
RU2112295C1 (ru) * 1995-11-29 1998-05-27 Александров Георгий Николаевич Управляемый шунтирующий реактор (варианты)
DE19634824A1 (de) * 1996-08-28 1998-03-12 Siemens Ag Elektrische Maschine
US5844791A (en) * 1997-06-30 1998-12-01 Mte Corporation Single-phase harmonic filter system
US6069413A (en) * 1998-10-26 2000-05-30 Herrick; Kennan C. Apparatus for generating an alternating magnetic field
DE10345659B4 (de) * 2003-09-25 2005-11-10 Siemens Ag Gießharz-Transformator
CN102568789A (zh) * 2012-03-28 2012-07-11 沈阳全密封变压器股份有限公司 多级调容变压器用圆筒式线圈结构

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE680283C (de) * 1933-07-23 1939-08-26 Telefunken Gmbh Als kombiniertes Widerstands- und Kapazitaetselement aufgebauter elektrischer Kondensator

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2172677A (en) * 1939-09-12 Electric protective device
GB311893A (en) * 1928-04-03 1929-05-23 Graham Amplion Ltd Improvements in or relating to means employed for supplying current or potentials from mains to utilization means
DE732163C (de) * 1934-10-24 1943-02-23 Koch & Sterzel Ag Stufenspannungswandleranordnung fuer hohe Spannungen zum Pruefen von Wandlern
US2395116A (en) * 1943-09-13 1946-02-19 Automatic Elect Lab Surge suppressor circuits
US2547614A (en) * 1948-09-24 1951-04-03 Gen Electric Saturable reactor arc prevention circuit
GB1031813A (en) * 1961-11-10 1966-06-02 English Electric Co Ltd Improvements in or relating to transformer tap-changers
US3419792A (en) * 1966-02-01 1968-12-31 Ohio Crankshaft Co Device for controlling the power factor in the output circuit of a generator
US3684949A (en) * 1967-10-20 1972-08-15 Sanken Electric Co Ltd Voltage regulator utilizing thyristor switch means
US3601622A (en) * 1969-04-17 1971-08-24 Bell Telephone Labor Inc Contact protection using charge storage diodes
DE2117422A1 (de) * 1971-04-08 1972-10-12 Schorch Gmbh Regeltransformator mit stoßspan nungsgeschutzter Stufenwicklung
JPS5118189B2 (fr) * 1972-03-24 1976-06-08
DE2222546C3 (de) * 1972-05-08 1979-10-31 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektrisches RC-Bauelement
DE2300896C3 (de) * 1973-01-09 1975-09-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Widerstands-Kondensator-Einheit
DE2328375C3 (de) * 1973-06-04 1978-12-14 Transformatoren Union Ag, 7000 Stuttgart Kondensatorbatterie zur Spannungssteuerung an Wicklungen von Transformatoren und Drosseln
US4041357A (en) * 1976-05-21 1977-08-09 Rca Corporation High voltage protection circuit
US4090225A (en) * 1977-01-21 1978-05-16 Mcgraw-Edison Company Fail-safe circuit for tap-changing transformer regulating system
JPS6050587B2 (ja) * 1977-07-15 1985-11-09 大阪曹達株式会社 ライニング方法
US4389691A (en) * 1979-06-18 1983-06-21 Power Management Corporation Solid state arc suppression device
US4363060A (en) * 1979-12-19 1982-12-07 Siemens-Allis, Inc. Arcless tap changer for voltage regulator
DE3126972C2 (de) * 1981-07-08 1985-05-09 Transformatoren Union Ag, 7000 Stuttgart Schaltungsanordnung für die Wicklungen eines Doppelstocktransformators
US4459629A (en) * 1981-11-23 1984-07-10 General Electric Company Electric circuit breaker utilizing semiconductor diodes for facilitating interruption
US4392173A (en) * 1981-12-14 1983-07-05 Ford Aerospace & Communications Corporation Circuit for reducing voltage stress across a transformer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE680283C (de) * 1933-07-23 1939-08-26 Telefunken Gmbh Als kombiniertes Widerstands- und Kapazitaetselement aufgebauter elektrischer Kondensator

Also Published As

Publication number Publication date
DE3465818D1 (en) 1987-10-08
US4678927A (en) 1987-07-07
EP0141296A1 (fr) 1985-05-15
JPH0416005B2 (fr) 1992-03-19
CA1239189A (fr) 1988-07-12
JPS60107812A (ja) 1985-06-13
ATE29333T1 (de) 1987-09-15
DE3338149A1 (de) 1985-05-02
BR8405289A (pt) 1985-08-27

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