EP0411171B1 - Alimentation selon les besoins pour une installation de commutation à moyenne tension - Google Patents

Alimentation selon les besoins pour une installation de commutation à moyenne tension Download PDF

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Publication number
EP0411171B1
EP0411171B1 EP89114115A EP89114115A EP0411171B1 EP 0411171 B1 EP0411171 B1 EP 0411171B1 EP 89114115 A EP89114115 A EP 89114115A EP 89114115 A EP89114115 A EP 89114115A EP 0411171 B1 EP0411171 B1 EP 0411171B1
Authority
EP
European Patent Office
Prior art keywords
voltage
windings
conductor
intermediate transformer
transformers
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
EP89114115A
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German (de)
English (en)
Other versions
EP0411171A1 (fr
Inventor
Erwin Dipl.-Ing. Hartmann (Fh)
Werner Dipl.-Ing. Heiss
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.)
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8201697&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0411171(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT89114115T priority Critical patent/ATE86049T1/de
Priority to EP89114115A priority patent/EP0411171B1/fr
Priority to ES198989114115T priority patent/ES2040943T3/es
Priority to DE8989114115T priority patent/DE58903615D1/de
Priority to NO903364A priority patent/NO177445C/no
Publication of EP0411171A1 publication Critical patent/EP0411171A1/fr
Application granted granted Critical
Publication of EP0411171B1 publication Critical patent/EP0411171B1/fr
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Classifications

    • 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

Definitions

  • the invention relates to a self-supply for a medium-voltage switchgear.
  • a device for feeding a mercury vapor rectifier in which a main and an additional transformer can be connected to one another via a formation switch.
  • the windings of the two transformers are each connected in star.
  • This device is designed for the application (supply of a mercury vapor rectifier) and requires special transformers. In the event of faults in the three-phase network, the faults are transmitted by the device.
  • the object of the present invention is to provide a self-supply that does not require a separate self-transformer.
  • the voltage converters which are present in each medium-voltage switchgear and which are used for data acquisition and which have a thermal load which is many times higher than that required for data acquisition are used to supply the power supply network.
  • the voltage transformers transmit - fully in the sense of theirs actual task - also faulty states. For example, in the case of a ground fault in a three-phase medium-voltage network, the voltage in one pole is approximately zero, whereas in the two undisturbed poles the voltage increases ⁇ 3 times. This voltage state is not permitted in a self-supply network.
  • the invention provides for an intermediate transformer to be connected to the secondary windings of the voltage converters, the input windings of which are connected in a triangle. Since the vector triangle of the secondary voltages of the voltage transformers is retained on the primary side in the event of an earth fault, the intermediate transformer also has its normal magnetic excitation in this operating case, ie the voltage between the conductors is retained.
  • the output winding of the intermediate transformer is connected in a star or in a zigzag, the star point being earthed in each case. This means that three single-phase voltages and a three-phase system with a fully resilient neutral conductor are available for the switchgear's own grid, in which earth faults in the medium-voltage network have no effect.
  • a personal supply according to claim 2 can advantageously be used both in single-pole encapsulated gas-insulated switchgear and in air-insulated switchgear.
  • an earth fault in the medium-voltage network can also be seen in the case of an own supply according to claim 2.
  • a voltage converter set 2 with its primary windings 211, 221, 231 is connected to the conductors L1, L2, L3 of this medium-voltage network 1.
  • the voltage converter set 2 consists of three single-pole insulated voltage converters 21, 22, 23, the primary windings 211, 221, 231 and the secondary windings 212, 222, 232 of which are each connected to form a star connection with an earthed star point.
  • the secondary windings 212, 222, 232 are connected to input windings 41, 43, 45 of an intermediate transformer 4, the input windings 41, 43, 45 being connected in a triangle.
  • the intermediate transformer 4 is connected with its output windings 42, 44, 46 to the power grid 5 of the medium-voltage switchgear.
  • the output windings 42, 44, 46 are connected in star.
  • the output windings 42, 44, 46 can also be connected in a zigzag.
  • a zigzag connection is advantageous in the event of extreme unbalanced loads, since a zigzag connection results in better load distribution on the individual output windings 42, 44, 46 of the intermediate transformer 4.
  • the self-supply network with any network form can be used for the "protective measures against dangerous body currents" (VDE 0100, part 410, IEC publication 364-4-41 and 364) with the star point -4-47) can be connected, ie the network types IT, TN and TT as well as the permitted combinations.
  • VDE 0100, part 410, IEC publication 364-4-41 and 364 with the star point -4-47
  • the star point of the output windings 42, 44, 46 is grounded and a PEN conductor is brought out for the connection of a TN network.
  • FIG 2 1 also denotes a three-phase medium-voltage network.
  • a voltage converter set 3 with its primary windings 311, 321 is connected to the conductors L1, L2, L3 of this medium-voltage network 1.
  • the voltage converter set 3 consists of two bipolar isolated voltage converters 31, 32 (both poles are fully isolated from earth). Each voltage converter 31, 32 is connected with the one terminal pole of its primary winding 311 or 321 to a conductor L1 or L3 of the medium-voltage network 1; the other connection poles of the primary windings 311, 321 are connected together to the still free conductor L2.
  • the secondary windings 312, 322 of the voltage converters 31, 32 are connected to ground with their one connection pole and connected to an input winding 41 or 45 of the intermediate transformer 4 with their other connection poles.
  • the remaining input winding 43 is connected to the grounded star point of the secondary windings 312, 322 of the voltage converters 31, 32.
  • the circuit design of the intermediate transformer 4 is identical to the structure of the intermediate transformer in FIG. 1 and is already described there.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Telephone Function (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Electronic Switches (AREA)
  • Control Of Electrical Variables (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Dc-Dc Converters (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Relay Circuits (AREA)
  • Ac-Ac Conversion (AREA)

Claims (6)

  1. Alimentation en besoin propre pour une installation de coupure à moyenne tension présentant les caractéristiques suivantes :
    - un jeu (2;3) de transformateurs de tension est raccordé, par ses enroulements primaires (211,221,231; 311,321), à un réseau triphasé à moyenne tension (1) et est raccordé, par ses enroulements secondaires (212,222,232; 312,332), à des enroulements d'entrée (41,43,45) d'un transformateur intermédiaire (4),
    - les enroulements d'entrée (41,43,45) du transformateur intermédiaire (4) sont branchés en triangle,
    - les enroulements de sortie (42,44,46) du transformateur intermédiaire (4) sont branchés en étoile ou en zig-zag, et à ces enroulements est raccordé le réseau auxiliaire de l'installation de coupure à moyenne tension.
  2. Alimentation en besoin propre suivant la revendication 1, dans laquelle le jeu (2) de transformateurs de tension est constitué par trois transformateurs de tension (21,22,23) isolés de façon unipolaire et dont les enroulements primaires (211,221,231) et les enroulements secondaires (212,222,232) sont branchés respectivement en étoile et que les deux neutres des montages en étoile sont raccordés à la terre.
  3. Alimentation en besoin propre suivant la revendication 1, présentant les caractéristiques suivantes :
    - le jeu (3) de transformateurs de tension est constitué par deux transformateurs de tension (31,32) isolés de façon bipolaire,
    - chaque transformateur de tension (31,32) est raccordé, par un pôle de raccordement de son enroulement primaire (311; 321), respectivement à un conducteur (L1;L3) du réseau triphasé à moyenne tension (1), et les autres pôles de raccordement des enroulements primaires (311,321) sont raccordés en commun au conducteur encore libre (L2),
    - les enroulements secondaires (321,322) des transformateurs de tension (31,32) sont raccordés, par des premiers pôles de raccordement, en commun à la terre et, par leurs autres pôles de raccordement, respectivement à un enroulement d'entrée (41;45) du transformateur intermédiaire (4), dont l'autre enroulement d'entrée (43) est raccordé au neutre, relié à la terre, des enroulements secondaires (312,322) des transformateurs de tension (31,32).
  4. Alimentation en besoin propre suivant la revendication 2, dans laquelle les transformateurs de tension (21,22,23) isolés de façon unipolaire sont conçus pour une tension nominale secondaire (tension conducteur-terre) de 100/√3 V et que le transformateur intermédiaire (4) est conçu pour une tension d'entrée (tension conducteur-conducteur) de 200 V.
  5. Alimentation en besoin propre suivant la revendication 2, dans laquelle les transformateurs de tension (21,22,23) isolés de façon unipolaire sont conçus pour une tension nominale secondaire (tension conducteur-conducteur) égale à 220 V et le transformateur intermédiaire (4) est conçu pour une tension d'entrée (tension conducteur-conducteur) égale à 380 V.
  6. Alimentation en besoin propre suivant une ou plusieurs des revendications précédentes, dans laquelle les enroulements de sortie (42,44,46) du transformateur intermédiaire (4) sont conçus respectivement pour une tension de sortie (tension conducteur-terre/tension conducteur-conducteur) égale à 220/380 V.
EP89114115A 1989-07-31 1989-07-31 Alimentation selon les besoins pour une installation de commutation à moyenne tension Expired - Lifetime EP0411171B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT89114115T ATE86049T1 (de) 1989-07-31 1989-07-31 Eigenbedarfsversorgung fuer eine mittelspannungsschaltanlage.
EP89114115A EP0411171B1 (fr) 1989-07-31 1989-07-31 Alimentation selon les besoins pour une installation de commutation à moyenne tension
ES198989114115T ES2040943T3 (es) 1989-07-31 1989-07-31 Abastecimiento del consumo propio para una instalacion de conexion de tension media.
DE8989114115T DE58903615D1 (de) 1989-07-31 1989-07-31 Eigenbedarfsversorgung fuer eine mittelspannungsschaltanlage.
NO903364A NO177445C (no) 1989-07-31 1990-07-30 Selvforsyning i mellomspennings apparatanlegg

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89114115A EP0411171B1 (fr) 1989-07-31 1989-07-31 Alimentation selon les besoins pour une installation de commutation à moyenne tension

Publications (2)

Publication Number Publication Date
EP0411171A1 EP0411171A1 (fr) 1991-02-06
EP0411171B1 true EP0411171B1 (fr) 1993-02-24

Family

ID=8201697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114115A Expired - Lifetime EP0411171B1 (fr) 1989-07-31 1989-07-31 Alimentation selon les besoins pour une installation de commutation à moyenne tension

Country Status (5)

Country Link
EP (1) EP0411171B1 (fr)
AT (1) ATE86049T1 (fr)
DE (1) DE58903615D1 (fr)
ES (1) ES2040943T3 (fr)
NO (1) NO177445C (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105896783B (zh) * 2016-05-20 2018-05-29 杨建华 一种用于单相220v和二相380v的双电源电机

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH180181A (de) * 1934-11-27 1935-10-15 Oerlikon Maschf Einrichtung zur Speisung eines Quecksilberdampfgleichrichters mit p.n Anoden durch einen Haupttransformator mit einer n-phasigen Sekundärwicklung und mit p parallel arbeitenden Anoden pro Phase.
CH234652A (de) * 1942-03-28 1944-10-15 Licentia Gmbh Aus Einphasentransformatoren bestehender Mehrphasen-Grosstransformator.

Also Published As

Publication number Publication date
ATE86049T1 (de) 1993-03-15
NO177445B (no) 1995-06-06
ES2040943T3 (es) 1993-11-01
NO903364L (no) 1991-02-01
EP0411171A1 (fr) 1991-02-06
NO177445C (no) 1995-09-13
DE58903615D1 (de) 1993-04-01
NO903364D0 (no) 1990-07-30

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