WO2014202447A1 - Transformateur de réseau régional réglable - Google Patents

Transformateur de réseau régional réglable Download PDF

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Publication number
WO2014202447A1
WO2014202447A1 PCT/EP2014/062185 EP2014062185W WO2014202447A1 WO 2014202447 A1 WO2014202447 A1 WO 2014202447A1 EP 2014062185 W EP2014062185 W EP 2014062185W WO 2014202447 A1 WO2014202447 A1 WO 2014202447A1
Authority
WO
WIPO (PCT)
Prior art keywords
taps
contactor
transformer
local network
pass
Prior art date
Application number
PCT/EP2014/062185
Other languages
German (de)
English (en)
Inventor
Zsolt SUKOSD
Gerd Griepentrog
Karsten Handt
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP14731577.4A priority Critical patent/EP2989646B1/fr
Publication of WO2014202447A1 publication Critical patent/WO2014202447A1/fr

Links

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
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current

Definitions

  • the invention relates to an adjustable local network transformer for transforming a medium voltage, typically in the kV range, in a local network voltage, for example 400 V.
  • Energy distribution networks are subject in particular by the impedances of the network components and by changing loads voltage fluctuations. It is desirable to keep the fluctuations as low as possible.
  • a changeover of the turns ratio is used in transformers between the high and medium voltages. This compensates for the voltage fluctuations occurring during load changes by changing the transmission ratio between the high and medium voltages.
  • at least one of the windings of the transformer is provided with a Rei ⁇ hey of taps that can be electrically connected.
  • a mechanism is provided which makes the changeover between two selector positions without interruption even under load.
  • a Windungskurz gleich is ver ⁇ avoided by the flow of current is briefly via resistors ge ⁇ forced.
  • Photovoltaic systems wind power plants and biomass power plants or smaller cogeneration units. If the electricity generated can not be taken directly, it is necessary to feed it from the low-voltage grid, ie local area network, into the medium-voltage grid in order to enable low-loss transmission over long distances. For this purpose, it is necessary to use a variable translation transformer in the local power transformer. ratio, ie to provide an adjustable local power transformer.
  • the object of the present invention is to provide a controllable local power transformer which is of particularly simple construction. This object is achieved by a controllable local power transformer having the features of claim 1. Advantageous embodiments and further developments are specified in the dependent claims.
  • the controllable local power transformer according to the invention has a transformer winding on the side of the local network voltage, wherein an end portion of the transformer winding has at least two first taps and the other end of the transformer winding is connected to a second output terminal for the local network voltage.
  • the local network transformer has a connecting line between each of the taps and a first output terminal for the location ⁇ mains voltage, wherein in each of the connecting lines, a three-phase contactor is arranged.
  • the local network transformer comprises a second tap in the end region of
  • Transformer winding which is connected via a three-phase by-pass contactor with the first output terminal, wherein in series with the bypass contactor, a current-limiting element is connected.
  • the contactors in the connecting lines thus allow a selection of the transmission ratio of the Ortsnetztransforma ⁇ sector by a direct connection can be established between the first output terminal and different taps of the winding.
  • the second tap of the low-voltage side transformer winding via a bypass contactor is also ver ⁇ connected with the first output terminal of the local power transformer.
  • the controllable local power transformer created in this way has the advantage of a simplified construction compared to known local power transformers.
  • a Thyristorschaltelements in byway a Steue ⁇ tion for the thyristors expedient that with a time resolution in the range of 10 - 100 ys operates.
  • the by-pass contactor only needs a control accuracy in the range of 10 - 20 ms.
  • the Ortsnetztrans ⁇ formator in the by-pass comprises a current-limiting element, which can be implemented, for example, as a resistor or inductance.
  • the by-pass contactor is preferably one of the utility categories AC3 or AC4. Because of the short time the byway contactor remains on, it is possible to do this
  • the second tap is one of the first taps.
  • the local network ⁇ transformer preferably comprises three taps, of which the middle - in relation to their location on the winding - is connected to the bypass contactor. Alternatively, a different number of taps may be provided, for example, five taps or seven taps.
  • the Mauwegs- contactor is preferably connected to the middle of the taps. In one embodiment of the local power transformer, more than one by-pass with more than one by-pass contactor is provided. These are advantageously connected to the second, fourth, sixth etc. tap counted from the end of the winding.
  • the local network ⁇ transformer contains the local network ⁇ transformer a control device that automatically performs a control of the load switching.
  • the control device expediently means that allow Erken ⁇ tion when a switch should occur.
  • these may be means for determining voltage and / or current on the input or output side. By this it is determined whether a switchover is necessary nö ⁇ tig, for example, by increasing the output side load, the corresponding slight decrease in the output voltage is detected.
  • the control of the load switching can also be taken from outside the local power transformer before ⁇ .
  • the Ortsnetztransforma ⁇ tor expedient means that a control from the outside he ⁇ possible.
  • a preferred, but by no means limitative exporting ⁇ approximately example of the invention will be based on the
  • FIG. 1 shows a line switch in a controllable local power transformer 10, which is shown in single phase for a better overview.
  • the local power transformer 10 has a primary winding 100 and a secondary low-voltage side Wick ⁇ averaging one hundred and first
  • the voltage on the side of primary winding 100 is 10 kV by way of example, while a voltage of 400 V AC is output on the side of the seconding ⁇ därwicklung one hundred and first
  • a first output terminal 19 of the local network transformer 10 is connected to the taps 13, 14, 15 in a more complex manner in order to realize a changeover of the transmission ratio in the local network transformer 10.
  • a second output terminal 12 of the local power transformer 10 is connected to the beginning 11 of the secondary winding 101.
  • the secondary winding 101 has a first tap 13
  • the length of the secondary winding 101 used can be increased or decreased by 10%, if one starts from the middle of the three taps 14.
  • the output terminals are connected to the first output terminal 19 for the switching of the transmission ratio.
  • the contactors 16a, b, c make a connection between the first output terminal 19 and the first, second or third tap 13, 14, 15 ago.
  • the second tap 14 has another connection to the first output terminal 19 in parallel with the second contactor 16b via a byway contactor 17 on. This connection serves to enable an uninterrupted changeover, in which the current is briefly conducted via the by-pass contactor 17. In series with the bypass contactor 17, a current-limiting resistor 20 is arranged.
  • the by-pass contactor 17 In normal operation, the by-pass contactor 17 is opened, while one of the contactors 16a, b, c, a connection with one of the taps 13, 14, 15 is made. If a changeover take place, the by-pass contactor 17 is closed in order to keep the current flow without interruption. After a short waiting time, for example stored in a control, has expired, the currently closed contactor 16a, b, c is opened and another of the contactors 16a, b, c is closed, i. the connection to the currently active tap 13, 14, 15 interrupted and then the connection to another of the taps 13, 14, 15 made. Thereafter, the by-pass contactor 17 is opened again. Between the beginning of the individual switching operations, a short waiting time is expediently observed, for example, in the size of the middle
  • Switching times of the contactors 16a, b, c As a result, unintentional short circuits are avoided.
  • a signal of the actuating coils can be evaluated in order to determine a suitable switching time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

L'invention concerne un transformateur de réseau régional, comprenant : - un enroulement de transformateur du côté de la tension du réseau régional, une zone d'extrémité de l'enroulement de transformateur comprenant au moins deux premières prises et l'autre extrémité de l'enroulement de transformateur étant reliée à un deuxième raccordement de sortie pour la tension du réseau local, - une conduite de liaison entre chacune des prises et un premier raccordement de sortie pour la tension du réseau local, un contacteur triphasé étant disposé dans chacune des conduites de liaison, - une deuxième prise dans la zone d'extrémité de l'enroulement de transformateur, laquelle est reliée par un contacteur triphasé de dérivation au premier raccordement de sortie, - un élément de limitation de courant monté en série avec le contacteur de dérivation.
PCT/EP2014/062185 2013-06-20 2014-06-12 Transformateur de réseau régional réglable WO2014202447A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14731577.4A EP2989646B1 (fr) 2013-06-20 2014-06-12 Transformateur de réseau local réglable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211653.5 2013-06-20
DE102013211653.5A DE102013211653A1 (de) 2013-06-20 2013-06-20 Regelbarer Ortsnetztransformator

Publications (1)

Publication Number Publication Date
WO2014202447A1 true WO2014202447A1 (fr) 2014-12-24

Family

ID=50979738

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/062185 WO2014202447A1 (fr) 2013-06-20 2014-06-12 Transformateur de réseau régional réglable

Country Status (3)

Country Link
EP (1) EP2989646B1 (fr)
DE (1) DE102013211653A1 (fr)
WO (1) WO2014202447A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831121A1 (de) * 1998-07-11 2000-01-13 Helmut Hinzen Mehrstufige Anlaufschaltung mit Anlauftransformator für einen Drehstrom-Kurzschlußläufermotor
DE102008064487A1 (de) 2008-12-22 2010-06-24 Siemens Aktiengesellschaft Mittel-Niederspannungstransformator mit Stufenschaltung
CN202068191U (zh) * 2011-01-19 2011-12-07 西安盟创电器有限公司 村口增压器
DE202014001799U1 (de) * 2014-02-27 2014-03-12 Schaltbau Gmbh Trafostufenschalter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747712C2 (de) * 1997-10-29 2000-09-07 Reinhausen Maschf Scheubeck Anordnung eines Stufenschalters an einem Stufentransformator
AT501582B1 (de) * 2001-11-20 2007-05-15 Va Tech Elin Transformatoren G Verfahren zur regelung der elektrischen spannung in elektrischen versorgungsnetzen sowie einrichtung zur durchführung des verfahrens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831121A1 (de) * 1998-07-11 2000-01-13 Helmut Hinzen Mehrstufige Anlaufschaltung mit Anlauftransformator für einen Drehstrom-Kurzschlußläufermotor
DE102008064487A1 (de) 2008-12-22 2010-06-24 Siemens Aktiengesellschaft Mittel-Niederspannungstransformator mit Stufenschaltung
CN202068191U (zh) * 2011-01-19 2011-12-07 西安盟创电器有限公司 村口增压器
DE202014001799U1 (de) * 2014-02-27 2014-03-12 Schaltbau Gmbh Trafostufenschalter

Also Published As

Publication number Publication date
EP2989646B1 (fr) 2020-03-25
DE102013211653A1 (de) 2014-12-24
EP2989646A1 (fr) 2016-03-02

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