EP0257291A1 - 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
EP0257291A1
EP0257291A1 EP87110408A EP87110408A EP0257291A1 EP 0257291 A1 EP0257291 A1 EP 0257291A1 EP 87110408 A EP87110408 A EP 87110408A EP 87110408 A EP87110408 A EP 87110408A EP 0257291 A1 EP0257291 A1 EP 0257291A1
Authority
EP
European Patent Office
Prior art keywords
winding
stage
stages
voltage
parallel
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.)
Granted
Application number
EP87110408A
Other languages
German (de)
English (en)
Other versions
EP0257291B1 (fr
Inventor
Werner Dr. 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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to AT87110408T priority Critical patent/ATE61886T1/de
Publication of EP0257291A1 publication Critical patent/EP0257291A1/fr
Application granted granted Critical
Publication of EP0257291B1 publication Critical patent/EP0257291B1/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
    • 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
    • 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

Definitions

  • the invention relates to a circuit arrangement for large power transformers with an undervoltage, an overvoltage master and a step winding in connection and counter-connection as well as with a star-point step switching device, a capacitor in series with a resistor being provided electrically in parallel with the step winding, which together form an RC Represent link and by their dimensioning significantly reduce the resonance amplitudes of the connection point of the step winding to the high-voltage main winding against earth.
  • Windings of transformers have certain natural resonance frequencies. If the frequency matches, an oscillating switching voltage applied from the outside can excite these natural vibrations and lead to very high internal stresses for the insulation of the winding.
  • an oscillating switching voltage applied from the outside can 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 fluctuations influence the end of the main winding in certain positions of the tap changer, especially in counter-connection, and also lead to voltage increases here and thereby endanger the insulation.
  • n C the capacitive transmission ratio of the main / step winding
  • n T the inductive transmission ratio of the main / step winding (less than zero for counter-switching)
  • Q the quality at the natural frequency of the step winding
  • the invention is therefore based on the object of providing an arrangement for the harmless reception of overvoltages on transformer windings originating from oscillating switching voltages and thereby further reducing the space required compared to that of the known solution.
  • this object is achieved in a circuit arrangement of the type mentioned above in that the RC element consisting of the capacitor and the resistor is only connected in parallel to a single stage of the multi-stage winding and that the transformer coupling of this stage with the other stages also in these occurring resonance amplitudes are reduced.
  • Advantageous embodiments of the invention consist in that the RC element is connected in parallel with an odd number of stages to an electrically located in the middle between the first and the last stage of the stage winding, or in that the RC element with an even number of stages is connected in parallel to a stage electrically located at the center of the stage winding.
  • the circuit arrangement according to the invention is very advantageous because it simultaneously ensures optimum protection of the step winding against oscillating switching impulse voltages with a minimal space requirement. Surprisingly, it has been found that when using an appropriately dimensioned and quite space-consuming RC element with an improved effectiveness, the overall arrangement requires a reduced volume compared to the known arrangement.
  • An undervoltage winding 12, a high-voltage main winding 13 and a step winding 14 with taps 0 to 10 are arranged in a conventional manner, concentrically around a core leg 11, from the inside outwards.
  • the taps 0 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 ends of the step winding 14 are connected to fixed contacts in a turner 18, the movable contact of which lies at the low-voltage end of the high-voltage master 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 leads or taps 5 and 6 of the step winding 14, which greatly reduces the capacitively transmitting voltage.
  • the capacitor 19 is preceded by a damping resistor 20 for damping its charging currents and for reducing the quality factor.
  • the capacitor 19 and the damping resistor 10 together form an RC element.
  • the volume required jointly for the step winding and the RC element drops compared to an arrangement in which the entire step winding or each individual step of the step winding is connected to an RC element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Power Conversion In General (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Keying Circuit Devices (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP87110408A 1986-07-30 1987-07-17 Dispositif de connexions pour transformateurs de grande puissance Expired - Lifetime EP0257291B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87110408T ATE61886T1 (de) 1986-07-30 1987-07-17 Schaltungsanordnung fuer leistungsgrosstransformatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3625845 1986-07-30
DE3625845 1986-07-30

Publications (2)

Publication Number Publication Date
EP0257291A1 true EP0257291A1 (fr) 1988-03-02
EP0257291B1 EP0257291B1 (fr) 1991-03-20

Family

ID=6306352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110408A Expired - Lifetime EP0257291B1 (fr) 1986-07-30 1987-07-17 Dispositif de connexions pour transformateurs de grande puissance

Country Status (7)

Country Link
EP (1) EP0257291B1 (fr)
AT (1) ATE61886T1 (fr)
BR (1) BR8703907A (fr)
DE (1) DE3768736D1 (fr)
ES (1) ES2020972B3 (fr)
GR (1) GR3001869T3 (fr)
PT (1) PT85439B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997001883A1 (fr) * 1995-06-28 1997-01-16 Swichtec Power Systems Limited Transformateur a prises avec un circuit resonnant
WO1997039463A1 (fr) * 1996-04-16 1997-10-23 Gennady Alexandrovich Markov Transformateur
RU2299486C1 (ru) * 2005-12-09 2007-05-20 Савелкова Елена Валентиновна Трехфазный трансформаторный агрегат
EP0763833B2 (fr) † 1995-09-14 2012-12-05 Bombardier Transportation GmbH Transformateur pour un véhicule à propulsion électrique
EP2549645A1 (fr) * 2011-07-21 2013-01-23 Telefonaktiebolaget LM Ericsson (publ) Agencement de filtre de transformateur
CN102945735A (zh) * 2012-11-06 2013-02-27 保定天威集团有限公司 一种带调压器的预充磁变压器及其制作方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR102021020237A2 (pt) * 2021-10-08 2023-04-18 Reson Energy Ltda Transformador elétrico com primário ressonante e secundário indutivo e método de fabricação do mesmo

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1658664A (en) * 1927-07-06 1928-02-07 Gen Electric Variable-ratio transformer
US1809895A (en) * 1928-10-08 1931-06-16 Frazer W Gay Protective system for transformers
CH275245A (de) * 1948-11-11 1951-05-15 Ceskoslovenske Z Tezkeho Stroj Schwingungsfreier Transformator.
FR2007394A1 (fr) * 1968-04-05 1970-01-09 Licentia Gmbh
FR2103536A1 (fr) * 1970-08-26 1972-04-14 Westinghouse Electric Corp
US3668511A (en) * 1971-02-16 1972-06-06 Mc Graw Edison Co Self energizing tap switch for electronic tap changer
DE2117422A1 (de) * 1971-04-08 1972-10-12 Schorch Gmbh Regeltransformator mit stoßspan nungsgeschutzter Stufenwicklung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3338149A1 (de) * 1983-10-20 1985-05-02 Transformatoren Union Ag, 7000 Stuttgart Schaltungsanordnung fuer leistungsgrosstransformatoren

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1658664A (en) * 1927-07-06 1928-02-07 Gen Electric Variable-ratio transformer
US1809895A (en) * 1928-10-08 1931-06-16 Frazer W Gay Protective system for transformers
CH275245A (de) * 1948-11-11 1951-05-15 Ceskoslovenske Z Tezkeho Stroj Schwingungsfreier Transformator.
FR2007394A1 (fr) * 1968-04-05 1970-01-09 Licentia Gmbh
FR2103536A1 (fr) * 1970-08-26 1972-04-14 Westinghouse Electric Corp
US3668511A (en) * 1971-02-16 1972-06-06 Mc Graw Edison Co Self energizing tap switch for electronic tap changer
DE2117422A1 (de) * 1971-04-08 1972-10-12 Schorch Gmbh Regeltransformator mit stoßspan nungsgeschutzter Stufenwicklung

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997001883A1 (fr) * 1995-06-28 1997-01-16 Swichtec Power Systems Limited Transformateur a prises avec un circuit resonnant
AU716573B2 (en) * 1995-06-28 2000-03-02 Swichtec Power Systems Limited Resonance tapped transformer
EP0763833B2 (fr) † 1995-09-14 2012-12-05 Bombardier Transportation GmbH Transformateur pour un véhicule à propulsion électrique
WO1997039463A1 (fr) * 1996-04-16 1997-10-23 Gennady Alexandrovich Markov Transformateur
RU2299486C1 (ru) * 2005-12-09 2007-05-20 Савелкова Елена Валентиновна Трехфазный трансформаторный агрегат
EP2549645A1 (fr) * 2011-07-21 2013-01-23 Telefonaktiebolaget LM Ericsson (publ) Agencement de filtre de transformateur
US9548155B2 (en) 2011-07-21 2017-01-17 Telefonaktiebolaget Lm Ericsson (Publ) Transformer filter arrangement
CN102945735A (zh) * 2012-11-06 2013-02-27 保定天威集团有限公司 一种带调压器的预充磁变压器及其制作方法

Also Published As

Publication number Publication date
PT85439A (pt) 1988-07-29
EP0257291B1 (fr) 1991-03-20
GR3001869T3 (en) 1992-11-23
ES2020972B3 (es) 1991-10-16
PT85439B (pt) 1993-09-30
BR8703907A (pt) 1988-04-05
DE3768736D1 (de) 1991-04-25
ATE61886T1 (de) 1991-04-15

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