EP3963612B1 - Schalteranordnung mit antriebssystem und verfahren zum antreiben eines schalters - Google Patents

Schalteranordnung mit antriebssystem und verfahren zum antreiben eines schalters Download PDF

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Publication number
EP3963612B1
EP3963612B1 EP20721208.5A EP20721208A EP3963612B1 EP 3963612 B1 EP3963612 B1 EP 3963612B1 EP 20721208 A EP20721208 A EP 20721208A EP 3963612 B1 EP3963612 B1 EP 3963612B1
Authority
EP
European Patent Office
Prior art keywords
drive shaft
switch
values
switch assembly
shaft
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
EP20721208.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3963612A1 (de
Inventor
Benjamin Dittmann
Eugen NAGEL
Sebastian Schmid
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 EP3963612A1 publication Critical patent/EP3963612A1/de
Application granted granted Critical
Publication of EP3963612B1 publication Critical patent/EP3963612B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • H01H2003/266—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor having control circuits for motor operating switches, e.g. controlling the opening or closing speed of the contacts
    • 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

Definitions

  • the invention relates to a switch arrangement with a switch and a drive system for the switch as well as a method for driving a switch.
  • switches for different tasks and with different requirements. In order to operate the respective switches, they must be driven by a drive system. These switches include on-load tap changers, load diverter switches, selectors, double reversers, reversers, pre-selectors, circuit breakers, load switches or isolating switches.
  • on-load tap-changers are used for uninterrupted switching between different winding taps of an electrical device, such as a power transformer or a controllable choke. This can be used to change the transformation ratio of the transformer or the inductance of the choke, for example. Double reversing switches are used to reverse the polarity of windings during power transformer operation.
  • a switch arrangement comprising a switch, in particular an on-load tap changer, and a drive system for the switch, the drive system including a drive shaft which connects the drive system to the switch; a motor with a rotor for driving the drive shaft; and a feedback system which is configured to determine at least two values for a position of the drive shaft; to generate a feedback signal based on the at least two values; and a control device which is configured to influence an operation of the motor depending on the feedback signal.
  • the improved concept is based on the idea of equipping a drive shaft for driving the switch with a feedback system that is able to detect at least two values for a position of the drive shaft.
  • the operation of the motor is influenced based on a feedback signal that is generated depending on both values.
  • a switch arrangement is specified with a switch and a drive system for the switch.
  • the drive system has a drive shaft which connects the drive system to the switch, a motor for driving the drive shaft and a feedback system.
  • the feedback system is designed to determine at least two values for a position of the drive shaft and to generate a feedback signal based on the at least two values.
  • the drive system has a control device which is designed to influence an operation of the motor depending on the feedback signal.
  • the switch can be designed as a load tap changer or a load diverter switch or a selector or a double reversing switch or a reversing switch or a pre-selector or a circuit breaker or a load switch or a disconnector.
  • values for the position of the drive shaft also includes those values of measured quantities from which the position of the drive shaft can be clearly determined, if necessary within a tolerance range.
  • the control device can check the plausibility of the position determination or compare the two values, thereby increasing the reliability of the position determination and reducing the corresponding residual risk of incorrect position determination.
  • a partial failure of the feedback device such that only one value can be determined for the position of the drive shaft, does not necessarily lead to the immediate shutdown of the drive shaft.
  • At least the switch can still be moved to a safe operating position in a controlled manner despite the partial failure.
  • this increases the operational reliability of the drive system, the switch and the equipment.
  • determining two values for the position of the drive shaft increases safety by reliably detecting a partial failure, and availability because a circuit can be safely completed despite the partial failure.
  • the drive system serves to drive a shaft of the switch, e.g. on-load tap-changer or a corresponding component of the on-load tap-changer.
  • This causes the on-load tap-changer to carry out one or more operations, for example a switchover between two winding taps of an operating device or parts of the switchover, such as a Load switching, a selector operation, a pre-selector operation or a double reversing operation.
  • the drive shaft is connected directly or indirectly, in particular via one or more gears, to the switch, in particular to the shaft of the switch.
  • the drive shaft is connected directly or indirectly, in particular via one or more gears, to the load diverter switch, selector, double reverser, reverser, circuit breaker, load switch or disconnector, in particular the shaft of the load diverter switch, selector, double reverser, reverser, circuit breaker, load switch or disconnector.
  • the drive shaft is connected directly or indirectly, in particular via one or more gears, to the motor, in particular to a motor shaft of the motor.
  • a position, in particular an absolute position, of the motor shaft corresponds to a position, in particular an absolute position, of the drive shaft. This means that the position of the motor shaft can be clearly deduced from the position of the drive shaft, possibly within a tolerance range.
  • the action includes controlling, regulating, braking, accelerating or stopping the motor.
  • the control can include, for example, position control, speed control, acceleration control or torque control.
  • the drive system represents a servo drive system.
  • the drive system comprises a monitoring unit which is designed to monitor the one or more operations of the switch, on-load tap changer, load diverter switch, selector, double reverser, reverser, preselector, circuit breaker, load switch or disconnector based on the feedback signal.
  • the monitoring particularly comprises monitoring as to whether individual operations or parts thereof are carried out correctly, in particular within predefined time windows.
  • the control device comprises a control unit and a power unit for the controlled or regulated energy supply of the motor.
  • the control unit is designed to control the power unit depending on at least a setpoint, in particular a position, speed or acceleration setpoint.
  • the power unit is designed as a converter or servo converter or as an equivalent electronic, in particular fully electronic, unit for drive machines.
  • control device contains the feedback system in whole or in part.
  • the feedback system is designed to determine a first value of the at least two values for the position of the drive shaft according to a first method and to determine a second value of the at least two values for the position of the drive shaft according to a second method, wherein the two methods can differ from one another. This creates at least one redundancy or even a diverse redundancy, which further increases operational reliability.
  • the two methods can be based on the same or different technical or physical principles or use the same or different components (hardware components).
  • one of the at least two values for the position of the drive shaft is a first value for an absolute position of the drive shaft.
  • another of the at least two values for the position of the drive shaft is a second value for an absolute position of the drive shaft.
  • the first and second values for the absolute position of the drive shaft can, for example, be compared by the control device. If there is a significant deviation, the control device can issue an error message or initiate a safety measure.
  • one of the at least two values for the position of the drive shaft is an incremental value for a position of the drive shaft or a value for a relative position of the drive shaft.
  • the first and/or second value for the absolute position can then be determined by the control device be compared with the incremental or relative value, whereby the plausibility of the first and/or second value for the absolute position can be checked.
  • the control device can issue an error message and/or initiate a safety measure.
  • the feedback system is configured to determine a rotor position of the motor and to determine one of the at least two values for the position of the drive shaft depending on the rotor position.
  • the rotor position is an angular range in which a rotor of the motor is located, optionally combined with a number of complete rotations of the rotor.
  • the position or absolute position of the motor shaft can be determined with an accuracy of at least 180°, for example by the control device.
  • the control device By reducing the gear ratio using one or more gears, the accuracy of the position of the drive shaft that can be achieved is significantly greater.
  • the evaluation by the control device corresponds to a virtual encoder function in a way. Even if an absolute encoder in the feedback system fails completely, at least emergency operation can be maintained and/or the switch, in particular the on-load tap changer, can be brought into a safe position.
  • the feedback system includes an absolute value encoder that is designed and arranged to detect the absolute position of the drive shaft or an absolute position of another shaft that is connected to the drive shaft and to generate at least one output signal based on the detected position.
  • the feedback system is designed to determine one of the at least two values for the position of the drive shaft, in particular the first and/or the second value for the absolute position, based on the at least one output signal.
  • the absolute encoder is attached directly or indirectly to the motor shaft, the drive shaft or a shaft coupled thereto.
  • the absolute encoder has a first output for outputting the first or second value for the absolute position and a second output for outputting the incremental or relative value for the position.
  • absolute encoder includes both devices that determine two values for the position in different ways and devices that contain two separate encoders, at least one of which is an absolute encoder.
  • the absolute encoder comprises a multi-turn encoder.
  • the absolute encoder is configured to detect the position of the drive shaft or the position of the further shaft using a first scanning method.
  • the absolute encoder is configured to additionally detect the position of the drive shaft or the position of the further shaft using a second scanning method which is independent of the first scanning method.
  • the first or second sensing method includes an optical, a magnetic, a capacitive, a resistive or an inductive sensing method.
  • the first scanning method differs from the second scanning method.
  • the absolute encoder is positively connected to the drive shaft, the motor shaft or the further shaft.
  • the absolute encoder is additionally connected to the drive shaft, the motor shaft or the other shaft in a force-fitting or material-fitting manner, for example by an adhesive connection.
  • the positive and additional material or force-fitting connection further increases the fastening of the absolute encoder and ultimately the operational reliability.
  • a method for driving an on-load tap changer comprises determining at least two values for an absolute position of a drive shaft for driving the on-load tap changer, generating a feedback signal based on the at least two values and controlling a motor for driving the on-load tap changer depending on the feedback signal.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of a switch arrangement 1 according to the improved concept with a switch 17 and a drive system 3, which is connected to the switch 17 via a drive shaft 16.
  • the switch 17 can be an on-load tap changer, load changeover switch, selector, double reverser, reverser, preselector, circuit breaker, load switch or disconnector.
  • the drive system 3 contains a motor 12, which can drive the drive shaft 16 via a motor shaft 16 and optionally via a gear 15.
  • a control device 2 of the drive system 3 comprises a power section 11, which contains, for example, a converter (not shown here), for the controlled or regulated energy supply of the motor 12, and a control unit 10 for controlling the power section 11, for example via a bus 18.
  • the drive system 3 has a sensor system 13, which serves as a feedback system 4 or is part of the feedback system 4 and is connected to the power section 11. Furthermore, the sensor system 13 is directly or indirectly coupled to the drive shaft 16.
  • the encoder system 13 is designed to detect a first value for a position, namely an angular position, for example an absolute angular position, of the drive shaft 16.
  • the encoder system 13 can comprise, for example, an absolute encoder, in particular a multi-turn absolute encoder, which is attached to the drive shaft 16, the motor shaft 14 or another shaft whose position is clearly related to the absolute Position of the drive shaft 16 is attached.
  • the position of the drive shaft 16 can be clearly determined from the position of the motor shaft 14, for example via a transmission ratio of the gearbox 15.
  • the fastening of the absolute encoder is designed, for example, as a combination of a positive connection with a force-fitting and/or material-fitting connection.
  • the feedback system 4 is also designed to detect a second value for the position of the drive shaft 16.
  • the sensor system 13 can be configured to detect the second value, in particular using a method which differs from a method by which the first value for the position of the drive shaft 16 is detected.
  • control device 2 can be set up to determine the second value from a rotor position of the motor 12, effectively thus having a virtual sensor for detecting the second value.
  • a rotor position of the motor 12 can be used. Since the strength of the feedback varies periodically, the rotor position can be determined approximately, in particular by means of signal analysis, for example FFT analysis. Since a full revolution of the drive shaft 16 corresponds to a large number of revolutions of the rotor, the position of the drive shaft 16 can be deduced from this with much greater accuracy.
  • the control device in particular the control unit 10 and/or the power unit 11, is designed to control or regulate the motor 12 depending on a feedback signal which the feedback system generates based on the first and the second value.
  • the control device 2 for example the control unit 10, can, for example, compare the two values for the position of the drive shaft 16 and/or carry out a plausibility check of the position determination.
  • FIG 2 shows a schematic representation of another exemplary embodiment of a switch arrangement 1 according to the improved concept, which is based on the embodiment according to Figure 1 based on.
  • the switch device 1 optionally has a control cabinet 21 within which the control unit 10, the power unit 11 and an optional human-machine interface 19 are arranged.
  • the human-machine interface 19 is connected to the control unit 10 and can be used, for example, for control, maintenance or configuration purposes during or outside of operation.
  • the motor 12, the motor shaft 14, the encoder system 13 and/or the gearbox 15 can be arranged inside or outside the control cabinet.
  • the switch arrangement 1, in particular the control unit 10, is coupled to a safety device 20, which comprises, for example, a circuit breaker, in order to disconnect the switch arrangement 1 or an electrical device to which the switch arrangement 1 is assigned from a power network, for example in the event of an error or a malfunction of the switch arrangement 1.
  • a safety device 20 which comprises, for example, a circuit breaker, in order to disconnect the switch arrangement 1 or an electrical device to which the switch arrangement 1 is assigned from a power network, for example in the event of an error or a malfunction of the switch arrangement 1.
  • a switch arrangement 1 increases the operational reliability of the drive system 3, the switch 17 and the equipment.
  • the described double position determination and corresponding adjustments reduce the residual risk of incorrect position determination.

Landscapes

  • Control Of Electric Motors In General (AREA)
  • Lock And Its Accessories (AREA)
EP20721208.5A 2019-05-15 2020-04-23 Schalteranordnung mit antriebssystem und verfahren zum antreiben eines schalters Active EP3963612B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019112711.4A DE102019112711A1 (de) 2019-05-15 2019-05-15 Schalteranordnung mit antriebssystem und verfahren zum antreiben eines schalters
PCT/EP2020/061276 WO2020229120A1 (de) 2019-05-15 2020-04-23 Schalteranordnung mit antriebssystem und verfahren zum antreiben eines schalters

Publications (2)

Publication Number Publication Date
EP3963612A1 EP3963612A1 (de) 2022-03-09
EP3963612B1 true EP3963612B1 (de) 2024-06-05

Family

ID=70456775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20721208.5A Active EP3963612B1 (de) 2019-05-15 2020-04-23 Schalteranordnung mit antriebssystem und verfahren zum antreiben eines schalters

Country Status (8)

Country Link
US (1) US20220216014A1 (pt)
EP (1) EP3963612B1 (pt)
JP (1) JP2022533594A (pt)
KR (1) KR20220006649A (pt)
CN (1) CN113853663A (pt)
BR (1) BR112021021001A2 (pt)
DE (1) DE102019112711A1 (pt)
WO (1) WO2020229120A1 (pt)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6713984B1 (en) * 1998-12-16 2004-03-30 Abb Ab Operating device for driving and controlling an electrical switching apparatus
BRPI0715824B8 (pt) * 2006-08-25 2022-12-13 Abb Technology Ltd Gabinete de acionamento de motor em um comutador de derivação em carga e comutador de derivação em carga
MX2013011089A (es) * 2011-03-27 2014-05-01 Abb Technology Ag Cambiador de toma con un sistema de activación mejorado.

Also Published As

Publication number Publication date
JP2022533594A (ja) 2022-07-25
EP3963612A1 (de) 2022-03-09
US20220216014A1 (en) 2022-07-07
CN113853663A (zh) 2021-12-28
BR112021021001A2 (pt) 2021-12-14
KR20220006649A (ko) 2022-01-17
DE102019112711A1 (de) 2020-11-19
WO2020229120A1 (de) 2020-11-19

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