EP2981979B1 - Verfahren zur durchführung eines umschaltvorgangs in einem laststufenschalter - Google Patents

Verfahren zur durchführung eines umschaltvorgangs in einem laststufenschalter Download PDF

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Publication number
EP2981979B1
EP2981979B1 EP14716255.6A EP14716255A EP2981979B1 EP 2981979 B1 EP2981979 B1 EP 2981979B1 EP 14716255 A EP14716255 A EP 14716255A EP 2981979 B1 EP2981979 B1 EP 2981979B1
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EP
European Patent Office
Prior art keywords
switching
voltage
phase
electric drive
during
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.)
Active
Application number
EP14716255.6A
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German (de)
English (en)
French (fr)
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EP2981979A1 (de
Inventor
Thomas Strof
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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Publication of EP2981979A1 publication Critical patent/EP2981979A1/de
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F5/00—Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
    • 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 a method for performing a switching operation in an on-load tap changer between winding taps of a tapped transformer.
  • On-load tap-changers have been in worldwide use for many years for uninterrupted switching between different winding taps of tapped transformers in large numbers. So-called reactor switches, which are particularly common in North America, have a switching reactance, which allows a slow, continuous switching.
  • On-load tap changers according to the resistance fast-switching principle usually consist of a selector for powerless selection of the respective winding tap of the tapped transformer to be switched to, and a diverter switch for the actual switching from the previous to the new, preselected winding tapping.
  • the diverter switch usually has switching contacts and resistance contacts.
  • the switch contacts are used for direct connection of the respective winding tap with the load dissipation, the resistor contacts for short-term wiring, d. H. Bridging by means of one or more switching resistors.
  • Such on-load tap changer with vacuum interrupters is for example from the DE 10 2009 043 171 A1 known.
  • a diverter switch carries a drivable by a power storage drive shaft with at least one cam.
  • the cam has a plurality of control cams, wherein two arranged on the cam front control cams have a deviating from a circular contour contour on the type of cam on the contact one each connected via a rocker arm with a vacuum interrupter roller is performed, the profiled contour of the respective control cam taps.
  • this on-load tap-changer requires a spring energy storage for sudden switching by means of the contact system.
  • known energy storage are mounted at the beginning of each actuation of the on-load tap-changer by a drive shaft, that is stretched.
  • the known energy storage consist essentially of a lift carriage and a jump carriage, between which power storage springs are arranged as energy storage.
  • Such energy storage are, for example, the DE 198 55 860 C1 as well as the DE 28 06 282 B1 removable.
  • the on-load tap-changers are used for a long time, it often happens that the pressure or tension springs break and thus prevent a changeover.
  • the shift shaft thus does not rotate completely and the switch contacts do not reach their end position. In the worst case, this can lead to the destruction of the entire tapped transformer.
  • the object of the invention is therefore to provide a method for performing a switching operation in an on-load tap-changer, in order to increase the safety of on-load tap-changers.
  • the general inventive idea consists in a method for carrying out a changeover operation of an on-load tap changer, which subdivide the switching sequence underlying the switching operation in several phases, the critical and uncritical switching states of each switch contacts used to monitor each of these phases during a switching operation and in dependence on a parameterized in a controller decision logic that processes the detected at the beginning of an intended switching operation by a voltage monitoring device value of the supply voltage as basis for decision and only then starts the switching or enters the next defined phase of the switching, when a supply voltage is detectable and
  • a voltage drop of the mains or supply voltage and thus in case of failure of the power supply of the electric drive, during a switching operation using the existing in the capacitors of the control energy overcomes each identified for a switching sequence critical switching states of the respective switching contacts over by the next, as uncritically identified phase of the switching states is switched.
  • a voltage monitoring device checks whether a voltage is applied to a selected phase line. If the voltage is not applied, the changeover is aborted and continued when the voltage is applied.
  • an electric drive is actuated via a controller which opens the second switching contact.
  • the power supply to the electric drive is monitored by a controller.
  • a voltage dip in the power supply of the electric drive energy from the capacitors of the controller is used to fully open the second switching contact.
  • an adjacent winding tap is approached by a second selector contact.
  • the electric drive is actuated via a controller and thereby the second switching contact is closed.
  • the power supply of the electric drive is monitored by the controller and the energy from capacitors of the controller is used to fully close the second switching contact at a voltage dip of the power supply of the electric drive.
  • the first selector contact is applied to one winding tap and the second selector contact is applied to the adjacent winding tap.
  • the first and the second switching contact are closed. During this time, a circulating current Ik is created.
  • the continuation of the switchover is checked by the voltage monitoring device as to whether a voltage is applied to a selected phase line. If the voltage is not present, the changeover is aborted, and the voltage continues.
  • the seventh, following phase an adjacent winding tap is approached by the first selector contact.
  • the electric drive is actuated via a controller and the first switching contact is closed.
  • the power supply of the electric drive is monitored by a controller and used in a voltage dip in the power supply of the electric drive, the energy from capacitors of the controller to fully close the first switching contact.
  • the switching is completed.
  • FIG. 1 shows a schematic view of an on-load tap changer with necessary means for performing a switching operation, in which critical positions are avoided.
  • FIGS. 2a-2i is an exemplary switching operation of an on-load tap changer, which operates on the reactor switching principle, mapped.
  • FIG. 3 shows a schematic flowchart with different phases during a switching operation.
  • FIG. 1 is an on-load tap-changer 1, according to the reactor switching principle, which is located in a tapped transformer 2, shown.
  • the step-up transformer 2 has a high-voltage side 3, to which the on-load tap-changer 2 is arranged, and an undervoltage side 4. Both the high-voltage side 3 and the low-voltage side 4 each have three phase lines L1, L2, L3, I1, I2, I3.
  • the on-load tap-changer 1 is actuated by an electric drive 5.
  • a controller 6 initiates the individual switching operations of the electric drive 5.
  • the controller 6 is connected via a controller 7 to the electric drive 5 and to a voltage monitoring device 8, referred to below as SUV 8.
  • the SUV 8 monitors the voltage of the individual phase lines I1, I2 and I3 on the low-voltage side 4.
  • the power supply of the electric drive 5 via one of these phase lines I1 the low-voltage side 4 via a line 9. However, this is each of the located on the undervoltage side 4 phase line I1, I2, or I
  • buffer capacitors are arranged, which are able to store a defined amount of energy. These are often components of the controller 6, but can also be retrofitted.
  • the Energy from a phase line I1, I2, or I3 used to open or close the located in the interior of the on-load tap changer 1 switching contacts V1, V2, in particular vacuum interrupters.
  • the critical positions arise during this switching process, in particular during the so-called hard opening or hard closing of the switching contacts. Hard opening or closing occurs when the contacts are under load, ie they carry a current. This creates arcs inside the switching contacts, which have an effect on the life of the contacts and can even lead to destruction if the burning time is too long.
  • FIGS. 2a-2i is an exemplary switching operation of an on-load tap-changer 1, which operates on the reactor switching principle shown.
  • the on-load tap-changer 1 consists of a first and a second switching contact V1 and V2, a first and a second movable selector contact W1 and W2 and a first and a second over-reacting X1 and X2.
  • a load dissipation Y is disposed between the first and second reactances X1 and X2.
  • the switching operation takes place from a first tap n a step winding to an adjacent second winding tap n + 1 a step winding of a tapped transformer 2, wherein an intermediate position n + 1/2 is allowed as a stationary operating position.
  • FIG. 2b the second switching contact V2 is opened, so that the second selector contact W2 can first be disconnected from the winding tapping n currentless.
  • the selector contact W2 moves to the second tap n + 1.
  • Figure 2d the switching contact V2 is closed. This leads to the so-called circular current Ik, FIG. 2e ,
  • the reactances X1 and X2 allow the on-load tap-changer 1 to remain in this position. This position is referred to as intermediate n + 1/2.
  • phase (I) FIG. 2a
  • the switchover is initiated.
  • the second switching contact V2 is opened.
  • the third phase (III) Figure 2c the adjacent second winding tap n + 1 is approached by the second selector contact W2.
  • phase four (IV) the second switching contact V2 is closed.
  • phase five (V) Figure 2d
  • both switch contacts V1 and V2 are closed.
  • phase six (VI) will the first switching contact V1 opened.
  • phase seven (VII) Figure 2g
  • the first selector contact W1 drives the adjacent second winding tap n + 1.
  • phase eight (VIII) of the first switching contact V1 is closed.
  • phase nine (IX) the switching process is completed.
  • the method according to the invention is represented by a schematic flow chart.
  • the SUV 8 upon initiation of the switching operation in the first phase (I), the SUV 8 first of all checks whether a voltage is applied to the phase line I1, I2, I3 selected for the energy supply. If this is not the case, the switching operation is not performed and the on-load tap-changer 1 remains in this position or the entire tapped transformer 2 is switched off. If a voltage is applied, the electric drive 5 is actuated via the controller 6.
  • the second switching contact V2 is opened.
  • This phase is to be regarded as a critical switching state, since it can come to a not completely open second switching contact V2 for non-extinction of the arc.
  • the controller 7 monitors during this time the power supply of the electric drive 5. If it comes during this phase (II) to a voltage dip, so a failure of the power supply, this is detected by the grain roller 7 and using the existing energy in the controller 6, from the previously charged capacitors, compensated, ie the second switching contact V2 is fully opened.
  • phase (III) When the opening is completed, in the third phase (III), the adjacent tap n + 1 is approached by the second selector contact W2.
  • phase four (IV) the power supply is monitored by the controller 7.
  • This phase (IV) is also to be regarded as a critical switching state, since it can lead to pre-ignition and subsequent non-extinction of the arc at a not completely closed second switching contact V2.
  • this is detected by the grain roller 7 and compensated by means of the energy present in the controller 6, from the previously charged capacitors, i. the second switching contact V2 is completely closed.
  • the fifth phase (V) ie after the second switching contact V2 has been closed, the so-called circular current Ik arises. This switching state is not critical.
  • phase six Before the opening of the first switching contact V1, ie phase six (VI), it is checked again whether a voltage is applied to the phase line I1, I2, I3 selected for the energy supply is applied. If this is not the case, the switching process is not performed and the on-load tap-changer remains in this position or the entire tapped transformer is switched off. In phase seven (VII), the adjacent tap n + 1 is approached. In the eighth phase (VIII), the first switching contact V1 is closed. The controller 7 monitors during this time the power supply of the electric drive 5. If it comes during this phase to a voltage dip, ie a failure of the power supply, this is detected by the grain roller 7 and with the help of existing in the controller 6, already pre-charged capacitors compensated. In the last phase, the switching process is completed.
  • Phases of switching I - Initiation of a changeover Checking the voltage of a selected phase line by means of SUV - Carrying out the changeover with applied voltage - Abort of the changeover when voltage is not present II - Actuation of the electric drive by means of control - Opening the second switching contact - Monitoring the voltage using a controller - Use of the energy of the capacitors from the controller at voltage dip for complete opening of the second Schaltempoes III - Approaching the adjacent winding tap by the second selector contact IV - Actuation of the electric drive by means of control - Close the second switching contact - Monitoring the voltage using a controller - Use of the energy of the capacitors from the controller at voltage dip for complete closing of the second Schaltempoes V - Stay with completely closed switching contacts - Origin of the circulating current - Checking the voltage of a selected phase line by means of SUV - Carrying out the changeover with applied voltage - Abort of the changeover when voltage is not present VI - Actuation of the electric drive

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)
  • Protection Of Transformers (AREA)
  • Keying Circuit Devices (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
EP14716255.6A 2013-04-04 2014-03-21 Verfahren zur durchführung eines umschaltvorgangs in einem laststufenschalter Active EP2981979B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310103360 DE102013103360A1 (de) 2013-04-04 2013-04-04 Verfahren zur Durchführung eines Umschaltvorgangs in einem Laststufenschalter
PCT/EP2014/055733 WO2014161729A1 (de) 2013-04-04 2014-03-21 Verfahren zur durchführung eines umschaltvorgangs in einem laststufenschalter

Publications (2)

Publication Number Publication Date
EP2981979A1 EP2981979A1 (de) 2016-02-10
EP2981979B1 true EP2981979B1 (de) 2017-08-16

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EP14716255.6A Active EP2981979B1 (de) 2013-04-04 2014-03-21 Verfahren zur durchführung eines umschaltvorgangs in einem laststufenschalter

Country Status (12)

Country Link
US (1) US9513654B2 (zh)
EP (1) EP2981979B1 (zh)
JP (1) JP6275244B2 (zh)
KR (1) KR102167439B1 (zh)
CN (1) CN105164770B (zh)
BR (1) BR112015024604B1 (zh)
DE (1) DE102013103360A1 (zh)
ES (1) ES2647825T3 (zh)
HK (1) HK1214677A1 (zh)
RU (1) RU2658290C2 (zh)
UA (1) UA118102C2 (zh)
WO (1) WO2014161729A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100263A1 (de) * 2013-01-11 2014-07-31 Maschinenfabrik Reinhausen Gmbh Laststufenschalter mit einer Verbindung zum Ölvolumen eines Transformators
JP6438028B2 (ja) * 2013-08-27 2018-12-12 マシイネンフアブリーク・ラインハウゼン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング 負荷時タップ切換器、電圧制御用タップ付変成器及びタップ付変成器での切換実施方法
DE102015102727A1 (de) * 2015-02-25 2016-08-25 Maschinenfabrik Reinhausen Gmbh Verfahren zum Ändern der aktiven Windungszahl einer Regelwicklung in einer elektrischen Anlage und elektrische Anlage mit einer Regelwicklung
JP2019067989A (ja) * 2017-10-04 2019-04-25 株式会社日立製作所 負荷時タップ切換装置の診断装置、負荷時タップ切換装置の診断方法、変圧器の診断装置

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DE1802253A1 (de) * 1968-10-10 1970-05-14 Siemens Ag Anordnung zur kurzschlussfesten Lastumschaltung bei einem Stufentransformator
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Also Published As

Publication number Publication date
CN105164770B (zh) 2017-05-10
RU2015146988A (ru) 2017-05-12
CN105164770A (zh) 2015-12-16
KR102167439B1 (ko) 2020-10-20
ES2647825T3 (es) 2017-12-26
RU2015146988A3 (zh) 2018-03-22
JP6275244B2 (ja) 2018-02-07
RU2658290C2 (ru) 2018-06-20
US9513654B2 (en) 2016-12-06
DE102013103360A1 (de) 2014-10-09
EP2981979A1 (de) 2016-02-10
KR20150140308A (ko) 2015-12-15
BR112015024604A2 (pt) 2017-07-18
JP2016519922A (ja) 2016-07-07
HK1214677A1 (zh) 2016-07-29
UA118102C2 (uk) 2018-11-26
WO2014161729A1 (de) 2014-10-09
BR112015024604B1 (pt) 2021-01-19
US20160018840A1 (en) 2016-01-21

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