EP3928339B1 - Hochspannungs-leistungsschaltersystem - Google Patents

Hochspannungs-leistungsschaltersystem Download PDF

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Publication number
EP3928339B1
EP3928339B1 EP20707002.0A EP20707002A EP3928339B1 EP 3928339 B1 EP3928339 B1 EP 3928339B1 EP 20707002 A EP20707002 A EP 20707002A EP 3928339 B1 EP3928339 B1 EP 3928339B1
Authority
EP
European Patent Office
Prior art keywords
crankshaft
circuit breaker
movement
voltage circuit
rotation
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
EP20707002.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3928339A1 (de
EP3928339C0 (de
Inventor
Paul Gregor Nikolic
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 Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global 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 Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Publication of EP3928339A1 publication Critical patent/EP3928339A1/de
Application granted granted Critical
Publication of EP3928339C0 publication Critical patent/EP3928339C0/de
Publication of EP3928339B1 publication Critical patent/EP3928339B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • 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
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3094—Power arrangements internal to the switch for operating the driving mechanism using spring motor allowing an opening - closing - opening [OCO] sequence

Definitions

  • the invention relates to a high-voltage circuit-breaker system according to the preamble of patent claim 1.
  • So-called short circuit breakers are defined for fault clearance in high and extra-high voltage networks, i.e. at voltages over 110 kilovolts in overhead lines. If a short-circuit is caused, for example, by a falling tree, a falling branch or a large bird, the switch interrupts the short-circuit current within a very short time. The circuit breaker switches off in a time of approx. 300 milliseconds and thus separates the area in which the short circuit occurs from the rest of the network. Since short circuits of this type often regenerate themselves, for example because the element causing the short circuit has burned off, the circuit breaker is closed again after a defined time, which is generally less than one second. If it is determined that the short circuit no longer occurs, the circuit breaker remains closed.
  • the switch must be opened again very quickly, i.e. also within approx. 300 milliseconds, in order to prevent further damage to the network. This opening then remains stationary for the time being until the cause has been remedied manually.
  • Such functionality which usually corresponds to the specifications of the network operator, is called open-close-open functionality, abbreviated O-C-O.
  • the object of the invention is to provide a circuit breaker system for a high-voltage application which has the open-close-open functionality and, compared to the prior art, has a technically less complex and compact drive system for a number of circuit breakers.
  • the high-voltage circuit breaker system according to the invention with an auto-reclosing function which results in an opening, closing and reopening movement of a contact system, comprises precisely this contact system which is mechanically connected to a drive system.
  • the drive system has a drive assembly.
  • the drive system also includes a drive shaft, which is designed in the form of a crankshaft. This crankshaft is connected to a moving contact of the contact system via a connecting rod.
  • the invention is characterized in that the cycle of the opening, closing and renewed opening movement of the contact system takes place through a unidirectional rotary movement of the crankshaft.
  • the advantage of the invention is that a drive unit performs the required opening, closing and further opening process via the crankshaft in a unidirectional rotary movement during one revolution of a shaft can.
  • This construction makes it possible to use simple drive units, such as electric motors or spiral springs. This significantly reduces the technical effort involved in constructing the drive unit. Due to the reduced technical complexity, the corresponding drive units can also be made more cost-effective.
  • a crankshaft is a shaft with one or more cranks that describe an eccentric rotary movement with respect to the axis of rotation of the shaft.
  • a push rod or connecting rod may be attached to the cranks, thereby converting rotational movement of the crankshaft into translational movement.
  • a crank can be a conventional elongated lever, but a crank can also be designed in the form of an extender disk.
  • An auto-reclosing function of a circuit breaker is, in the event of a short circuit, to open the power line for a short time, on the order of less than half a second, to short it out again for a similar period of time, after which it is possible to check whether a short circuit is still present, and to open it again , if there is still a short circuit. Should the short circuit clear during the first interrupt interval, the circuit breaker will remain in the closed position.
  • mechanically connected means that there is a mechanical connection for the transmission of a force, an impulse or an action between two systems, for example via movable connections such as bearings or joints, but also via fixed connections such as material or non-positive connections or from combinations of movable and fixed connections.
  • the crankshaft is designed in such a way that, starting from a closed position of the contact system to an open position of the contact system, a unidirectional rotary movement is performed, which is between 150° and 210° with respect to its axis of rotation.
  • a rotary movement of 180° between the closed position and the open position is advantageous. Due to geometrical requirements and taking into account opening and closing times, the optimum rotational movement for the opening process can be in a range that deviates from 180°, that is between 150° and 210°.
  • the crankshaft is designed in such a way that for the cycle of opening, closing and renewed opening movement of the contact system, a unidirectional rotary movement is performed with respect to the axis of rotation of the crankshaft, which is between 350° and 360° plus 10°.
  • a unidirectional rotary movement is performed with respect to the axis of rotation of the crankshaft, which is between 350° and 360° plus 10°.
  • an increased or reduced contact pressure between contacts of the contact system can, for example, be implemented by over-rotation or under-rotation, that is to say 10° less than 360° or 10° more than 360°.
  • the crankshaft is preferably designed in such a way that a crank pin which is eccentric with respect to the axis of rotation is arranged on a crank and describes a circular movement about the axis of rotation of the crankshaft during the rotary movement of the crankshaft. It is also useful that this crank pin is aligned parallel to the axis of rotation. Furthermore, the crank pin can be surrounded by a plain bearing of the connecting rod, thus ensuring the transmission of power and the conversion of the rotary movement into a translatory movement.
  • the crankshaft has at least three cranks, which has the advantage that a number of circuit breakers can be operated simultaneously by a drive shaft, ie by the crankshaft and by a drive.
  • the term three cranks means that at least three pins are present, each of which is surrounded by a pair of cranks and rotate at an eccentric distance from the axis of rotation of the crankshaft.
  • crank and pair of cranks have equivalent meanings, since when using more than one crank or pair of cranks and a rotational movement of almost or more than 360°, pairs of cranks are inevitably required in order not to block the rotational movement of the connecting rod.
  • cranks or pairs of cranks have different rotational directions with respect to the axis of rotation of the crankshaft.
  • the first crank or the first pair of cranks preferably points in one direction
  • the second pair of cranks points in a second direction, which is offset in the order of 180° to the first crank.
  • the third crank again preferably points in the direction of the first crank.
  • three circuit breakers can be operated by a common crankshaft and a common drive. It is also possible to move the circuit breakers closer to one another due to the offset design of the cranks, since they are arranged offset, which results in a roughly triangular arrangement of the circuit breakers. In this way, a great deal of installation space can be saved when accommodating the circuit breakers.
  • FIG. 1 1 is a schematic representation of a high voltage circuit breaker system having a contact system 4 arranged in a housing 42.
  • the housing 42 is basically designed to be gas-tight; an insulating gas can be present inside the housing, which can be, for example, sulfur hexafluoride or a fluoroketone or a fluoronitrile. However, the insulating gas can also be synthetic, cleaned air.
  • the circuit breaker 2 can also include a vacuum tube.
  • the contact system 4 has a fixed contact 44 and a moving contact 14 .
  • the moving contact 14 is connected to a contact bolt 40 which in turn is mechanically connected to a crankshaft 10 via a connecting rod 12 .
  • the push rod 12 can be designed, for example, in the form of a conventional connecting rod.
  • the connecting rod 12 has a sliding bearing 38 or 40 at each of its ends, with the sliding bearing 38 being fastened to a pin 34 which is part of the crankshaft 10 .
  • the journal 34 is framed by two cranks 32 which bring about the eccentric arrangement of the journal 34 from an axis of rotation 30 of the crankshaft 10 .
  • the crankshaft 10 in turn is part of a drive system 6 which includes a drive unit 8 in addition to the crankshaft 10 .
  • Various drive technologies can be used for the drive unit 8 .
  • an electric motor can ensure the drive, but spiral springs can also be used.
  • the crankshaft 10 is supported in bearings 48 .
  • the drive unit 8 is designed in such a way that it moves in a direction of rotation 16 so that the crankshaft 10 also performs a unidirectional rotary movement along the arrow 16 . If this rotary movement 16 about the axis of rotation 30 of the crankshaft 10 takes place once by 360°, this leads to the results as shown in FIGS figures 2 , 3 and 4 is shown, first to an opening movement along the arrow 20 according to figure 2 , wherein for the maximum opening width of the contact system 4, ie the maximum movement of the moving contact 4, a 180° rotary movement of the crankshaft 10 along the direction of rotation 16 takes place.
  • a tripping unit (not shown here) gives the signal for a further 180° movement of the crankshaft 10, as per FIG figure 4 along the arrow 24 means a further opening movement.
  • the cycle which includes an opening, closing and reopening process, is completed.
  • the high-voltage circuit breaker 2 initially remains open at this point.
  • this cycle is illustrated schematically along a time axis. At the time before and at time T 0 there is no short circuit or any other confirmation of the network, so that the high-voltage circuit breaker 2 is closed in its basic position.
  • the switch is switched back to normal figure 3 closed, this is present at time T 2 . If the event causing the short circuit is still present, there is a further opening movement up to time T 3 , according to FIG figure 4 .
  • FIG 5 a circuit breaker system 2 is shown in which three circuit breakers 3 are arranged next to one another and are jointly driven by a drive system 6 .
  • the crankshaft 10 according to figure 5 has three cranks 32 which are each connected to a circuit breaker 3 .
  • the three circuit breakers 3 are switches for the individual phases of a power grid, which can be used to switch in the circuit breaker system 2 with a drive system 6 at the same time.
  • the processes of the rotary movement along the arrow 16 correspond to what is described with reference to FIGS.
  • FIG 6 an analog circuit breaker system 2 is shown, which basically carries out the same movement sequences as is already the case with regard to the Figures 1 to 4 is described.
  • the system 2 differs in the shape of the crankshaft 10, the crank 32 of the crankshaft 10 being designed in the form of an eccentric disk and being arranged at one end of the crankshaft 10.
  • the crank pin 34 is arranged on the crank 32 in the form of an eccentric disc without a counter bearing in a second crank.
  • FIG. 8 a cross section through a crankshaft 10 in the area of the crank pin 34 between two cranks 32 is shown. It is shown how the slide bearing 38, which in turn is connected to a push rod 12, is arranged around the crank pin 34. It is in figure 8 also evident how the crank pin 34 describes a rotational movement 36 eccentrically to the axis of rotation 30 and can complete a unidirectional rotation of initially 360° for opening and closing and then, if necessary, by a further 180°.
  • the end of the push rod 12, which is provided with a further slide bearing (see FIG. 1, reference number 46), is in engagement with the contact pin 40, which is not shown in detail here.
  • Such a circuit breaker system also has a contact system 4', which includes a fixed contact 44' and a moving contact 14', which in turn is operatively connected to a contact pin 40'.
  • the contact system 4' is surrounded by a housing 42'.
  • the cycle opening-closing and reopening which is illustrated by the arrows 20', 22', is designed by a complex spring mechanism, with two spring accumulators 50-I and 50-II via a Rocker arms 52 are connected, which is shown here very schematically.
  • the rocker arm 52 has the effect that when the contact system 4' is opened, a spring-loaded accumulator 50-I is relieved and, in return, the spring-loaded accumulator 50-II is tensioned. This process is reversed with a further opening or closing movement.
  • This is an extremely complex mechanical arrangement that can be implemented alternatively by the technically simpler embodiment of the crankshaft 10 described.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
EP20707002.0A 2019-03-29 2020-02-17 Hochspannungs-leistungsschaltersystem Active EP3928339B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019204441.7A DE102019204441A1 (de) 2019-03-29 2019-03-29 Hochspannungs-Leistungsschaltersystem
PCT/EP2020/054044 WO2020200566A1 (de) 2019-03-29 2020-02-17 Hochspannungs-leistungsschaltersystem

Publications (3)

Publication Number Publication Date
EP3928339A1 EP3928339A1 (de) 2021-12-29
EP3928339C0 EP3928339C0 (de) 2023-08-16
EP3928339B1 true EP3928339B1 (de) 2023-08-16

Family

ID=69699840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20707002.0A Active EP3928339B1 (de) 2019-03-29 2020-02-17 Hochspannungs-leistungsschaltersystem

Country Status (5)

Country Link
US (1) US12014890B2 (zh)
EP (1) EP3928339B1 (zh)
CN (1) CN113748475B (zh)
DE (1) DE102019204441A1 (zh)
WO (1) WO2020200566A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019204441A1 (de) 2019-03-29 2020-10-01 Siemens Aktiengesellschaft Hochspannungs-Leistungsschaltersystem
DE102019204443A1 (de) 2019-03-29 2020-10-01 Siemens Aktiengesellschaft Stromunterbrechersystem
WO2023168388A1 (en) * 2022-03-03 2023-09-07 Sensata Technologies Inc. Multi-switch contactor assembly
US20240096570A1 (en) * 2022-09-19 2024-03-21 Eaton Intelligent Power Limited Bi-stable assembly for a switchable electrical apparatus
GB2628188A (en) * 2023-03-14 2024-09-18 Eaton Intelligent Power Ltd Actuating mechanism for a device

Family Cites Families (18)

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DE2543107C3 (de) * 1975-09-25 1978-07-20 Siemens Ag, 1000 Berlin Und 8000 Muenchen Einrichtung zur Antriebssteuerung für hydraulisch betätigte Hochspannungs-Leistungsschalter
CA1091732A (en) * 1976-04-28 1980-12-16 Westinghouse Electric Corporation Circuit breaker apparatus including jack shaft support
CH660931A5 (de) 1983-03-28 1987-05-29 Bbc Brown Boveri & Cie Hochspannungsschalter.
US4940026A (en) * 1987-05-13 1990-07-10 Fisher Martin A Internal combustion engine with balancing forces
DE3874500D1 (de) * 1987-12-14 1992-10-15 Sprecher Energie Ag Federkraftspeicherantrieb fuer einen hochspannungsschalter.
KR100390795B1 (ko) * 2000-12-04 2003-07-10 엘지산전 주식회사 진공 차단기
DE102006001241A1 (de) * 2006-01-06 2007-07-12 Siemens Ag Schaltstelle eines elektrischen Schaltgerätes sowie Verfahren zum Bewegen eines Schaltstückes einer Schaltstelle
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KR101100707B1 (ko) * 2009-12-31 2012-01-02 엘에스산전 주식회사 진공차단기
EP2421017B1 (en) 2010-08-13 2017-10-04 ABB Schweiz AG Medium voltage circuit breaker arrangement operated by special transmission means
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DE102019204441A1 (de) 2019-03-29 2020-10-01 Siemens Aktiengesellschaft Hochspannungs-Leistungsschaltersystem

Also Published As

Publication number Publication date
EP3928339A1 (de) 2021-12-29
WO2020200566A1 (de) 2020-10-08
CN113748475B (zh) 2024-03-08
US12014890B2 (en) 2024-06-18
EP3928339C0 (de) 2023-08-16
CN113748475A (zh) 2021-12-03
DE102019204441A1 (de) 2020-10-01
US20220189722A1 (en) 2022-06-16

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