EP0510474B1 - Dispositif d'ajustage - Google Patents

Dispositif d'ajustage Download PDF

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Publication number
EP0510474B1
EP0510474B1 EP92106344A EP92106344A EP0510474B1 EP 0510474 B1 EP0510474 B1 EP 0510474B1 EP 92106344 A EP92106344 A EP 92106344A EP 92106344 A EP92106344 A EP 92106344A EP 0510474 B1 EP0510474 B1 EP 0510474B1
Authority
EP
European Patent Office
Prior art keywords
windings
winding
group
stepped
transformer
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
EP92106344A
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German (de)
English (en)
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EP0510474A1 (fr
Inventor
Dusan Dipl.-Ing. Pertot
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0510474A1 publication Critical patent/EP0510474A1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers
    • 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 device for adjusting the phase shift between the voltages of at least two three-phase networks according to the preamble of claim 1.
  • a three-phase network coupling transformer according to the preamble of claim 1 is known, in which the upper and lower voltage windings are each connected to a step winding, the taps of the respective tap changer of upper and lower voltage windings each form a common star point .
  • the step windings can each be reversed, so that the voltage vector in this network coupling transformer a step winding on the high-voltage side by + 60 ° or -120 ° and the voltage vector of a step winding on the low-voltage side is rotated by -60 ° or + 120 ° and vice versa with respect to the voltage vector of the respective main winding.
  • a disadvantage of this design is that when the step windings are switched at 60 ° and at 120 °, unequal angles arise between the voltages of the networks to be connected.
  • This transformer can only be used for setting the phase shift in both directions without changing the ratio, i.e. can only be used at small angles.
  • the invention has for its object to eliminate the disadvantages mentioned above.
  • the object is achieved according to the invention with a device according to the features of claim 1. In this way, a symmetrical change in the bias voltage is possible without changing the transmission ratio. Large phase shift angles can be set.
  • Preferred embodiments of the device are specified in claims 2 and 3. These designs are particularly simple in their construction and are particularly suitable for those applications in which an economy circuit cannot be used and a transformer set is not economically viable.
  • the phase shift can be adjusted in very fine steps.
  • the embodiments according to claims 6 and 7 can be used with advantage if a large setting range for the phase shift is required. The above advantages apply mutatis mutandis to the solution according to claim 8.
  • phase shift In meshed high-voltage networks, there is often the need to influence the active power distribution as required in addition to the reactive power flow control by changing the voltage level (insertion of a "longitudinal additional voltage” in the voltage system). This is achieved by changing the voltage phase shift angle (hereinafter phase shift for short) by inserting a "transverse additional voltage” in the voltage system.
  • transformers or transformer sets are used for a gradual adjustment of the phase shift under load - also called cross-voltage regulator.
  • the device 1 shows a basic arrangement for this.
  • Two three-phase networks A, B are connected to one another via a device 1 a for setting the angle of the phase shift between the voltages of the three-phase networks A, B.
  • the device 1a contains a transformer 3, which galvanically separates the three-phase networks A, B from one another.
  • the device 1a allows either the three-phase networks A, B to be coupled to one another with a predetermined phase shift, or - if there is no phase shift - this is set using the device 1a.
  • the device can be used both for the ratio 1: 1 and for ratios different from 1: 1 of the transformer.
  • FIG. 2 shows a device 1b for use according to FIG. 1, which comprises only one transformer 3a.
  • the transformer 3a has a first and a second group of windings 6u, 6v, 6w and 6r, 6s, 6t, which can also be referred to as primary and secondary windings or overvoltage and undervoltage windings.
  • first and a second group of windings 6u, 6v, 6w and 6r, 6s, 6t which can also be referred to as primary and secondary windings or overvoltage and undervoltage windings.
  • only the first group of windings 6u, 6v, 6w and the components assigned to them are referred to.
  • the explanations apply mutatis mutandis to the second group.
  • the individual windings 6u, 6v, 6w of the first group are each formed as a main winding and are each arranged together with a step winding 8u, 8v, 8w on one leg of the core of the transformer 3a.
  • the step windings 8u, 8v, 8w of the first group are connected to the star point 10a of the first group via a neutral point tap changer which includes the tap changers 9u, 9v, 9w.
  • the ends of the step windings 8u, 8v, 8w facing the windings 6u, 6v, 6w are connected cyclically interchanged with the windings 6u, 6v, 6w via switches 7u, 7v, 7w designed as a common selector.
  • the switches 7u, 7v, 7w of the selector do not effect - as in the prior art - the connection and disconnection of the step windings 8u, 8v, 8w, but switch the step windings 8u, 8v, 8w from an adjacent phase when actuated Winding 6u, 6v, 6w to the other neighboring phase in the sense of a cyclical exchange.
  • the switch position "+" shown, for. B. the winding 6v via the switch 7u, the step winding 8u and the step switch 9u connected to the star point 10a.
  • the voltage vector of the step winding 8u has the same direction as the voltage vector of the winding 6u.
  • the tap changer 9u is in the switching position n, in which the desired bias voltage has a maximum value.
  • the switches 7u, 7v, 7w can be actuated. If the tap changers 9u, 9v, 9w are in position K, the switches 7u, 7v, 7w of the selector can be switched to position "-" after a further switching command, causing a reversal of the voltage on the tap winding 8u of, for example, + 120 ° -120 ° compared to the voltage of the winding 6v is effected.
  • the desired direction of the phase shift can thus be specified with the selector.
  • the switching sequence described is achieved mechanically by a reversing gear.
  • the tap changers 9u to 9t can be driven simultaneously by a common motor drive.
  • the device 1c additionally comprises a switching group selector 11r, 11s, 11t for the second group of windings 6r, 6s, 6t.
  • the switching group selector 11r, 11s, 11t can be designed as a motorized or manually operated changeover switch. However, it can also be implemented, for example, with screw connections (reclamping device).
  • the switching group selector 11r, 11s, 11t causes the switching group of the transformer 3b to be changed twice by cyclically interchanging the phases.
  • the shift group selector 11r, 11s, 11t can initially shift the phase angle by ⁇ 120 °. This setting is made in a de-energized state. After this "rough prefix"
  • the phase switch 9u, 9v, 9w or 9r, 9s, 9t and the switches 7u, 7v, 7w or 7r, 7s, 7t can be used to fine-tune the phase angle so that, for example, a setting range of +60 to 180 ° is achievable. In this way, a phase shift of up to ⁇ 180 ° can be set.
  • a switching group selector can also be provided for both groups of step windings 8u, 8v, 8w or 8r, 8s, 8t. 3 can also be modified such that the transformer 3b has the switching group Yy6 instead of Yy0.
  • FIGS. 4 shows an adjusting device 1d which comprises two transformers 3c, 3d.
  • the transformers 3c, 3d form a transformer set, one transformer serving as an excitation transformer 3c and the other transformer serving as an additional transformer 3d.
  • the windings 6u to 6t of both transformers 3c, 3d, which are connected to the three-phase networks A, B, are each designed in accordance with the explanations according to FIGS. 2 and 3.
  • the first group of windings 6u, 6v, 6w is arranged on the excitation transformer 3c and the second group of windings 6r, 6s, 6t on the additional transformer 3d.
  • the "secondary-side" coupling windings 13u, 13v, 13w, or 13r, 13s, 13t are each connected in star and connected to one another.
  • the coupling windings 13r, 13s, 13t of the additional transformer 3d additionally have a vector group selector 11r, 11s, 11t, which allows the phase shift to be adjusted five times in steps of 60 °. In this way, setting ranges can be selected that overlap.
  • the switch group selector of all the designs shown can also be designed as a diverter or as a clamping device.
  • the adjustment range of the device 1c can thus encompass 360 °, an overlap of the individual 60 ° steps by a further 60 ° being possible.
  • This embodiment has the advantage that an adjustment of the phase angle under load overlapping adjustment range is possible.
  • the coupling windings 13u, 13v, 13w of the excitation transformer 3c can also be connected in a triangle, so that the transformer set has the switching group Yy0 or Yy6.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Cereal-Derived Products (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Vehicle Body Suspensions (AREA)
  • Ac-Ac Conversion (AREA)
  • Control Of Electrical Variables (AREA)

Claims (8)

  1. Dispositif (1d) pour régler le déphasage entre les tensions d'au moins deux réseaux triphasés (A,B), comportant des premier et second groupes d'enroulements de transformateur (6r à 6w), qui sont associés chacun à l'un des réseaux triphasés (A,B), chaque enroulement (6r à 6w) de chaque groupe étant relié au point neutre (10a,10b) du groupe respectif par l'intermédiaire d'un enroulement à gradins pouvant être commuté (8r à 8w), caractérisé par le fait que les enroulements à gradins (8r à 8w) associés à un groupe peuvent être commutés de façon cyclique et que les deux groupes d'enroulements (6r à 6w) ayant leurs enroulements à gradins respectifs (8r à 8w) font partie de transformateurs distincts (3c,3d), les transformateurs (3c,3d) étant reliés entre eux par l'intermédiaire d'enroulements de couplage (13r à 13w). (Figure 4).
  2. Dispositif suivant la revendication 1, caractérisé par le fait que les enroulements à gradins (8r à 8w) peuvent être commutés de telle sorte que le vecteur de tension de chaque enroulement à gradins (8r à 8w) soit tourné soit de + 120°, soit de - 120° par rapport au vecteur de tension de l'enroulement (6r à 6w) qui lui est raccordé.
  3. Dispositif suivant la revendication 1 ou 2, caractérisé par le fait que les enroulements à gradins (8r à 8w) peuvent être commutés au moyen de commutateurs (9r à 9w) de gradins, les commutateurs (9r à 9w) de gradins ayant un dispositif commun d'entraînement à moteur.
  4. Dispositif suivant la revendication 3, caractérisé par le fait qu'entre les commutateurs (9r à 9w) de gradins et le dispositif d'entraînement à moteur est disposée une boîte de renversement de marche pour un actionnement alterné des commutateurs (9r à 9w) de gradins des deux groupes.
  5. Dispositif suivant l'une des revendications 1 à 4, caractérisé par le fait qu'au moins un groupe d'enroulements (6r à 6t) ou d'enroulements de couplage (13r, 13s, 13t) comporte un sélecteur de groupe de commutation (11r à 11t)
  6. Dispositif suivant la revendication 5, caractérisé par le fait que le sélecteur de groupe de commutation (11r à 11t) peut être commuté selon des pas de ± 120°.
  7. Dispositif suivant la revendication 5, caractérisé par le fait que le sélecteur de groupe de commutation (11r à 11t) peut être commuté selon plusieurs pas de +60° ou -60°.
  8. Dispositif (1a,1b,1c) pour régler le déphasage entre les tensions d'au moins deux réseaux triphasés (A,B), comportant des premier et second groupes d'enroulements de transformateur (6r à 6w), qui sont associés chacun à l'un des réseaux triphasés (A,B), chaque enroulement (6r à 6w) de chaque groupe étant relié au point neutre (10a,10b) du groupe respectif par l'intermédiaire d'un enroulement à gradins pouvant être commuté (8r à 8w), les deux groupes d'enroulements (6r à 6w) ayant de leurs enroulements à gradins (8r à 8w) faisant partie d'un transformateur commun (3,3a,3b), caractérisé par le fait que les enroulements à gradins (8r à 8w) peuvent être commutés de telle sorte que le vecteur de tension de chaque enroulement à gradins (8r à 8w) est pivoté soit de +120°, soit de -120° par rapport au vecteur de tension de l'enroulement (6r à 6w) qui est raccordé audit enroulement, que les enroulements à gradins (8r à 8w) peuvent être commutés au moyen de commutateurs de gradins, les commutateurs de gradins (9r à 9w) ayant un dispositif d'entraînement commun à moteur, et entre les commutateurs de gradins (9r à 9w) et le dispositif d'entraînement à moteur est disposé une boîte de renversement de marche pour un actionnement alterné des commutateurs de gradins (9r à 9w) des deux groupes.
EP92106344A 1991-04-23 1992-04-13 Dispositif d'ajustage Expired - Lifetime EP0510474B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4113243 1991-04-23
DE4113243 1991-04-23

Publications (2)

Publication Number Publication Date
EP0510474A1 EP0510474A1 (fr) 1992-10-28
EP0510474B1 true EP0510474B1 (fr) 1995-11-22

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EP92106344A Expired - Lifetime EP0510474B1 (fr) 1991-04-23 1992-04-13 Dispositif d'ajustage

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EP (1) EP0510474B1 (fr)
AT (1) ATE130699T1 (fr)
DE (1) DE59204391D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19632172A1 (de) * 1996-08-09 1998-02-12 Asea Brown Boveri Drehstromtransformator
DE19748146A1 (de) * 1997-10-31 1999-05-06 Asea Brown Boveri Drehstromtransformator
ES2786255T3 (es) * 2013-12-05 2020-10-09 Reinhausen Maschf Scheubeck Disposición de conmutación

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1763020B1 (de) * 1968-03-23 1971-08-26 Reinhausen Maschf Scheubeck Schaltanordnung zur Laengs- und Querspannungsregelung eines dreiphasigen Stufentransformators
DE2034638A1 (de) * 1970-07-13 1972-01-20 Transformatorenwerk August Lep Anordnung einer Stufenregelwicklung für 90 Grad - Querregulierung bei Stern- und Offenschaltung in Drehstromtransformatoren
DE3047521C2 (de) * 1980-12-17 1985-06-27 Schorch GmbH, 4050 Mönchengladbach Dreiphasiger Netzkupplungstransformator
JPH0779063B2 (ja) * 1988-08-15 1995-08-23 三菱電機株式会社 位相調整変圧器

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Publication number Publication date
ATE130699T1 (de) 1995-12-15
EP0510474A1 (fr) 1992-10-28
DE59204391D1 (de) 1996-01-04

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