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WO2025016693A1 - Procédé d'actionnement d'un dispositif changeur de prises en charge, et dispositif changeur de prises en charge - Google Patents

Procédé d'actionnement d'un dispositif changeur de prises en charge, et dispositif changeur de prises en charge Download PDF

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Publication number
WO2025016693A1
WO2025016693A1 PCT/EP2024/068084 EP2024068084W WO2025016693A1 WO 2025016693 A1 WO2025016693 A1 WO 2025016693A1 EP 2024068084 W EP2024068084 W EP 2024068084W WO 2025016693 A1 WO2025016693 A1 WO 2025016693A1
Authority
WO
WIPO (PCT)
Prior art keywords
changer
load tap
control unit
load
temperature
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.)
Pending
Application number
PCT/EP2024/068084
Other languages
German (de)
English (en)
Inventor
Dominik PLITZKO
Thomas Hesse
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
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 Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of WO2025016693A1 publication Critical patent/WO2025016693A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0027—Operating mechanisms
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H2009/0061—Monitoring tap change switching devices

Definitions

  • the invention relates to a method for operating an on-load tap-changer device and an on-load tap-changer device.
  • the on-load tap-changer device comprises at least one on-load tap-changer with a load changeover switch with a second control unit, a motor and a control device with a first control unit.
  • the invention relates to an on-load tap-changer device for carrying out the method according to the invention.
  • On-load tap-changers are usually used to regulate voltage in different transformers. Most on-load tap-changers use simple mechanical contacts or vacuum interrupters to carry out the switching. A drive system is used to operate these on-load tap-changers, which winds up a spring energy storage device, which ultimately operates the on-load tap-changer. On-load tap-changers with semiconductor switching elements sometimes no longer require spring energy storage devices, so conventional drive systems are not suitable.
  • the invention proposes a method for operating an on-load tap-changer device comprising an on-load tap-changer comprising a load diverter switch with a second control unit, a motor and a control device with a first control unit, characterized by the following steps: in one step, a signal for switching the on-load tap-changer is received from the first control unit of the control device; that in one step, the second control unit is used to determine which first temperature is present in or on the on-load tap-changer; that in one step, the first control unit is used to select one of several driving profiles for the motor of the on-load tap-changer, which is based on the first temperature determined by the second control unit, on the basis of which a switchover or actuation is carried out; and that in one step, the switchover or actuation is carried out and monitored by means of the motor and the control device according to the selected driving profile.
  • the method makes it possible to operate an on-load tap-changer device and in particular the on-load tap-changer as a function of an external parameter, namely a temperature.
  • a temperature in particular can have a damaging effect on parts of the on-load tap-changer. This applies in particular during switching, when high currents flow through the on-load tap-changer and its individual parts or when high voltages are present on these individual parts.
  • a temperature determination before a switchover is used to select a driving profile. At lower temperatures, the on-load tap-changer can be operated normally. At high temperatures, switchovers are carried out more quickly.
  • the on-load tap-changer device can be designed in any desired manner and can, for example, comprise an on-load tap-changer with a motor and a control device.
  • the control device can be designed in any desired manner and can, for example, comprise a power supply and/or a first control unit.
  • the first control unit is preferably formed from one or more microcontrollers, wherein each microcontroller can have a separate computing unit and a memory. Furthermore, the first control unit can have a first communication element.
  • the signal for switching the on-load tap changer or for operating the on-load tap changer and thus the on-load tap changer device can preferably be received by the first control device.
  • This signal is preferably generated by a network measurement controller, a monitoring system or by manual input (not shown here) and transmitted by these to the first control device.
  • the method can be carried out in any way; preferably, after the identifier has been selected, pause times are adjusted in the second control device of the load changeover switch. These pause times determine when the semiconductor switching elements of the load changeover switch are actuated. The pause times depend on the previously determined identifier.
  • the method can be carried out in any way, but the driving profile is preferably selected based on the transmitted identifier. Since the identifier corresponds to a specific temperature or a temperature from a specific temperature range, the driving profile corresponds to the requirements of the temperature range.
  • Figure 1 shows an on-load tap-changer device with a transformer
  • Figure 2 is a detailed schematic representation of the on-load tap-changer device
  • Figure 4a shows a possible driving profile
  • Figure 4b shows another possible driving profile.
  • the transformer 10 is filled with an insulating medium, ie the on-load tap changer 1 and the control winding 20 are arranged in the insulating medium (insulating oil).
  • the motor 4 is preferably designed as a stepper motor.
  • Figure 2 shows a detailed schematic representation of the on-load tap-changer device 50, which comprises the on-load tap-changer 1 and the control device 6.
  • a motor 4 in the on-load tap-changer 1 is connected to the selector 2 of the on-load tap-changer 1 via the motor shaft 5.
  • the control device 6 comprises a power supply 61, which contains, for example, an AC/DC or DC/DC converter or a driver circuit (with a stepper motor driver for controlled or regulated control of the motor) for the controlled or regulated power supply of the motor 4.
  • the control device 6 has a sensor system (not shown here) which serves as a feedback system or is part of the feedback system and is connected to the control device 6 or the first control unit 62. Furthermore, the sensor system is directly or indirectly coupled to the motor shaft or the motor 4 (not shown).
  • the motor shaft can be connected directly to the drive shaft 5. Alternatively, the motor shaft corresponds to the drive shaft 5.
  • the control device 6, in particular the first control unit 62, is designed and configured to detect and monitor the voltages and/or currents present at the transformer 10, to calculate aggregated values and to specify by switching commands when the on-load tap changer device 50 is to be actuated.
  • the network measurement controller of the first control unit 62 can preferably be used for this purpose.
  • the encoder system is designed to detect at least a first value for a position, in particular an angular position, for example an absolute angular position, of the motor shaft.
  • the encoder system can comprise, for example, a Hall sensor and a magnet, wherein the magnet is attached to the motor shaft or another shaft whose position is clearly linked to the absolute position of the motor shaft, and the Hall sensor determines or monitors the position of the magnet.
  • the encoder system which is used as a feedback system, reports the position of the motor shaft 5 to the first control unit 62 and thus monitors whether the motor shaft 5 is correctly following the selected driving profile 70, 80 or is complying with the specified parameters.
  • the control device 6 has a temperature sensor 64, which is connected to the first control unit 62 or is part of the control unit 62. This is used to determine the temperature of the control device 6. This is preferably arranged in close proximity to the motor 4, i.e. the insulating medium in which the on-load tap changer 1 is arranged.
  • the load changeover switch 3 is used to carry out the actual load switching under load.
  • the load changeover switch 3 comprises a second control unit 31, several semiconductor switching elements, varistors and a second communication element 32.
  • the second control unit 31 is preferably designed as a microcontroller and, in addition to a computing unit, also has a memory.
  • the second control unit 31 can be designed and set up to determine its own temperature and thus the first temperature of the load changeover switch 3.
  • the load changeover switch 3 can have a temperature sensor with which the first temperature of the load changeover switch 3 can be determined. For both embodiments, it is assumed that the first temperature of the load changeover switch 3 corresponds to the temperature of the transformer 10 filled with insulating medium.
  • Figure 3 shows a process sequence for operating an on-load tap-changer device 50, in particular the implementation of a switchover of the on-load tap-changer 1 with the motor 4 by the control device 6.
  • a signal for "switching" is first sent to the control device 6.
  • the first control unit 62 of the first control device 6 receives a signal for switching the on-load tap-changer 1. This signal is generated by a network measurement controller, a monitoring system or by manual input (not shown here).
  • the on-load tap-changer 1 of the on-load tap-changer device 50 must, for example, be operated in order to adjust the output voltage of the transformer 10 (see Figure 1).
  • adjustment runs during maintenance are also conceivable, i.e. an operation of the on-load tap-changer 1 in service mode.
  • This temperature represents the insulation medium temperature in the transformer 10. If this temperature is not within a valid range, such as higher than -40° Celsius, alternatively -25° Celsius or lower than +120° Celsius, the switchover is aborted. If the measured temperature is within a specified or valid range, the next step 42 is carried out.
  • step 42 part of the actuation of the on-load tap changer 1 takes place.
  • the selector 2 is actuated by means of the motor 4 and the drive shaft 5 up to a certain point until the load changeover switch 3 is supplied with energy or an operating voltage is applied.
  • the drive shaft 5 is preferably rotated by 70°.
  • the selector 2 has two selector arms which, in the stationary state, contact a selector contact and are therefore at the same potential. At the start of the actuation, one of the selector arms is moved to a second selector contact which is at a different potential than the previous selector contact. This creates a potential difference between the selector arms, which supplies the load changeover switch 3 with energy.
  • a temperature determination or Temperature measurement is carried out on or in the load tap changer 1, in particular in or on the load diverter switch 3.
  • the second control unit 32 can have an integrated or separately designed temperature sensor for this purpose.
  • Based on the determined first temperature one of two identifiers A, B is selected in a next step 44 in the second control unit 32.
  • the second identifier B corresponds to a temperature in a temperature range greater than 100° Celsius ( ⁇ 100°C).
  • a next step 45 the corresponding identifier A or B is transmitted to the first communication element 63 of the first control unit 61 by means of the second communication element 32 and the optical fiber 8.
  • a corresponding driving profile 70, 80 is then selected in the next step 46 based on the transmitted identifier A, B.
  • this driving profile 70, 80 the further actuation of the on-load tap changer 1 is carried out or continued and monitored in step 47.
  • two identifiers A and B and correspondingly two driving profiles 70 and 80 are used.
  • the control unit 6 controls the motor 4, which acts on the selector 2 and the load changeover switch 3 of the on-load tap changer 1 via the drive shaft 5.
  • step 44 the sequence of the semiconductor switching elements to be actuated in the load diverter switch 3 is shortened or extended based on the determined identifier A or B by changing at least one waiting time in the switching sequence accordingly, i.e. shortening or extending it.
  • steps 43 to 46 neither the selector 2 is actuated by the motor 4 nor the load changeover switch 3, i.e. the motor 4 is stationary and does not drive any motor shaft or drive shaft.
  • steps 43 to 46 can be carried out while the drive shaft 5 is rotated in a range of 70° - 90°. A rotation of the drive shaft by 360° causes a complete actuation or switching of the on-load tap changer or the on-load tap changer device.
  • This simplified method allows the on-load tap-changer 1 or the on-load tap-changer device 50 to be operated with only two driving profiles 70, 80.
  • Different driving profiles 70, 80 are primarily necessary to operate the semiconductor switching elements in the load changeover switch 3 at high temperatures in the transformer for a shorter period of time. This extends the service life of the semiconductor switching elements and thus that of the entire on-load tap-changer device 50.
  • Figures 4a and 4b show possible driving profiles 70, 80 of the motor 4 after a selection based on the identifiers A and B, which were determined by the first temperature in the load changeover switch 3.
  • the time is plotted on the x-axis and the speed V on the y-axis.
  • the second driving profile 80 has significantly steeper flanks, ie the motor 4 is accelerated significantly more until it reaches the target speed.
  • the switching in the second driving profile 80 is completed significantly faster than in the first driving profile, preferably by up to 0.15 seconds.
  • the duration or running time of the first driving profile 70 is longer than that of the second driving profile 80.
  • Semiconductor switching elements in the load changeover switch 3 are thus loaded for a much shorter time, which is particularly advantageous at particularly high temperatures in the insulating

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

L'invention concerne un procédé d'actionnement d'un dispositif changeur de prises en charge (50) qui comprend un changeur de prises en charge (1) qui comprend un commutateur de transfert de charge (3) avec une seconde unité de commande (31), un moteur (4) et un dispositif de commande (6) avec une première unité de commande (62), ledit procédé étant caractérisé par les étapes suivantes : - dans une étape (40), un signal de commutation du changeur de prises en charge (1) est reçu par la première unité de commande (62) du dispositif de commande (6) ; - dans une étape (43), au moyen de la seconde unité de commande (31), une première température dans ou au niveau du changeur de prises en charge (1) est déterminée ; - dans une étape (46), au moyen de la première unité de commande (62), l'un d'une pluralité de profils d'entraînement (70, 80) pour le moteur (4) du changeur de prises en charge (1) est sélectionné, ledit profil d'entraînement étant basé sur la première température déterminée par la seconde unité de commande (31), sur la base de laquelle un transfert est effectué ; et - dans une étape (47), le transfert est effectué par le moteur (5) et le dispositif de commande (6) en fonction du profil d'entraînement sélectionné (70, 80).
PCT/EP2024/068084 2023-07-17 2024-06-27 Procédé d'actionnement d'un dispositif changeur de prises en charge, et dispositif changeur de prises en charge Pending WO2025016693A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023118790.2 2023-07-17
DE102023118790.2A DE102023118790A1 (de) 2023-07-17 2023-07-17 Verfahren zum Betätigen einer Laststufenschaltervorrichtung und Laststufenschaltervorrichtung

Publications (1)

Publication Number Publication Date
WO2025016693A1 true WO2025016693A1 (fr) 2025-01-23

Family

ID=91758773

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/068084 Pending WO2025016693A1 (fr) 2023-07-17 2024-06-27 Procédé d'actionnement d'un dispositif changeur de prises en charge, et dispositif changeur de prises en charge

Country Status (2)

Country Link
DE (1) DE102023118790A1 (fr)
WO (1) WO2025016693A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7444266B2 (en) * 2006-03-21 2008-10-28 Abb Technology Ltd. Control system for a transformer or reactor
US10742019B2 (en) * 2016-11-22 2020-08-11 Abb Power Grids Switzerland Ag Monitoring tap changer switching

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2704571B2 (ja) * 1991-12-13 1998-01-26 愛知電機株式会社 交流開閉装置
WO2018070023A1 (fr) * 2016-10-13 2018-04-19 株式会社東芝 Dispositif de commutation de prise en charge
DE102019112715B3 (de) * 2019-05-15 2020-10-01 Maschinenfabrik Reinhausen Gmbh Verfahren zum Durchführen einer Umschaltung eines Laststufenschalters mittels eines Antriebssystems und Antriebssystem für einen Laststufenschalter
DE102019112718A1 (de) * 2019-05-15 2020-11-19 Maschinenfabrik Reinhausen Gmbh Verfahren zum Durchführen einer Umschaltung von mindestens einem Schaltmittel eines Betriebsmittels und Antriebssystem für mindestens ein Schaltmittel eines Betriebsmittels
DE102020119344A1 (de) * 2020-07-22 2022-01-27 Maschinenfabrik Reinhausen Gmbh Laststufenschalter und verfahren zur betätigung eines laststufenschalters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7444266B2 (en) * 2006-03-21 2008-10-28 Abb Technology Ltd. Control system for a transformer or reactor
US10742019B2 (en) * 2016-11-22 2020-08-11 Abb Power Grids Switzerland Ag Monitoring tap changer switching

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DE102023118790A1 (de) 2025-01-23

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