EP1986302A1 - Leistungsbackup in einem Antriebssystem für einen Schutzschalter und Schutzschalter - Google Patents

Leistungsbackup in einem Antriebssystem für einen Schutzschalter und Schutzschalter Download PDF

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Publication number
EP1986302A1
EP1986302A1 EP07445016A EP07445016A EP1986302A1 EP 1986302 A1 EP1986302 A1 EP 1986302A1 EP 07445016 A EP07445016 A EP 07445016A EP 07445016 A EP07445016 A EP 07445016A EP 1986302 A1 EP1986302 A1 EP 1986302A1
Authority
EP
European Patent Office
Prior art keywords
unit
circuit breaker
drive unit
power backup
drive
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.)
Withdrawn
Application number
EP07445016A
Other languages
English (en)
French (fr)
Inventor
Johan Blom
Alexander Tenzelius
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.)
ABB Technology AG
Original Assignee
ABB Technology AG
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 ABB Technology AG filed Critical ABB Technology AG
Priority to EP07445016A priority Critical patent/EP1986302A1/de
Priority to CN200880013388A priority patent/CN101669261A/zh
Priority to PCT/EP2008/054646 priority patent/WO2008132058A1/en
Publication of EP1986302A1 publication Critical patent/EP1986302A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01H33/36—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor

Definitions

  • the invention generally relates to the field of high voltage circuit breakers.
  • the invention is related to an improved means for keeping a drive unit of a circuit breaker drive system energized during power failure.
  • Protective relays are used throughout electrical power distribution systems for providing protection and control.
  • the protective relays detect and isolate faults on transmission and distribution lines by opening and closing circuit breakers. Circuit breakers are thus an important part of power distribution systems and protect the electrical systems from damage caused by for example overload or short circuit.
  • the circuit breaker is operated by a suitable drive system, which performs the opening and closing of the circuit breaker.
  • the circuit breaker comprises contact devices arranged to interrupt the currents and a mechanism for opening and closing the contact devices.
  • Figure 1 illustrates a known three-pole circuit breaker.
  • the circuit breaker comprises three breaker poles 1, 2, 3 each having a circuit breaker contact device.
  • the three poles 1, 2, 3 of the circuit breaker are mounted on a common support frame 4, which also supports the mechanism for opening and closing the contact devices.
  • the mechanism is in the illustrated case a motor 5 controlled by a drive unit 6.
  • the drive unit 6 is therefore kept energized for a short period of time even after a power failure. This is, in the prior art solution, accomplished by using an energy storage unit and an energy-charging unit of the drive unit 6.
  • the energy storage unit and the energy charging unit are in normal operation used for providing operating energy to the motor 5 in order to move the circuit breaker contacts between the open and closed positions.
  • the energy storage unit is dimensioned so as to meet the requirements for operating the circuit breaker. This in turn means that the user cannot choose the length of the time period during which the drive unit 6 is self powered after a power failure. To enlarge the energy storage unit, i.e. to over dimension it in order to keep the drive unit 6 energized in case of power failure is an expensive solution.
  • a drive unit for a circuit breaker comprises a control unit for controlling opening and closing operations of the circuit breaker.
  • the drive unit is characterised in that it comprises a separate power backup unit for providing power backup to the control unit during a power failure.
  • the energy storage unit of the drive unit is used only for operating the circuit breaker, whereby no energy needs to be taken from the energy storage unit in order to drive the control electronics. Further yet, no special charging unit is required and a simplified charging unit can be used. This provides a more cost-efficient solution. Still further, the separate power backup unit makes it possible to customise the hold up time of the control electronics in case of a power failure.
  • high capacitive capacitors are used as the separate power backup unit. This provides a reliable power backup having a long service life and being able to withstand varying outdoor temperatures. Further, the use of high capacitive capacitors makes it possible to perform a discharge operation of the energy in the energy storage unit in case of a service of the circuit breaker even during a complete power loss. The discharge can be made through the motor and the discharge can be performed fast. An improved security is thereby provided and it is possible to perform a service at shorter notice than in the prior art solution, where the energy storage unit has to self discharge during several hours.
  • the separate power backup unit is arranged to also power a display unit of the drive unit. Important information may thereby be shown also in case of a power failure.
  • a circuit breaker comprising a drive unit as above, whereby advantages similar to the above are achieved.
  • the operating mechanism or actuator means for opening and closing the contact devices of the circuit breaker can be of different types, for example implemented by a spring, or hydraulic or pneumatic technologies or of a motorized type.
  • the present invention is related to motorized drive systems, wherein the servomotor driving the operating actuator of the circuit breaker is controlled via electronics.
  • the servomotor is used to directly drive the operating actuator of the circuit breaker.
  • FIG. 2 illustrates an embodiment of a circuit breaker 10 in accordance with the present invention.
  • the circuit breaker 10 comprises a drive unit 11, an energy transmission 12 and one or more circuit breaker poles 13 (only one shown in the figure).
  • the breaker pole 13 comprises contact devices for opening (tripping) and closing the circuit breaker 10.
  • the energy transmission 12 is arranged to open and close (trip and close) the circuit breaker contacts.
  • the energy transmission 12 comprises a servomotor directly or by mechanical links moving the circuit breaker contacts.
  • a control unit 17 of the drive unit 11 digitally controls the servomotor.
  • a motor resolver is the interface between the control unit 17 and the servomotor. The connections between the different parts are indicated in the figure by arrows.
  • the invention is concerned with the drive unit 11 of the circuit breaker 10.
  • the drive unit 11 comprises a charging unit 14, an energy buffer, which is in the following denoted capacitor unit 15, a converter unit 16, a control unit 17 and an I/O (input/output) unit 18.
  • the capacitor unit 15 provides feeding current to the servomotor of the circuit breaker 10.
  • the capacitor unit 15 comprises a number of series/parallel connected electrolytic capacitors.
  • the capacitor unit 15 may comprise two groups connected in series, and wherein each group consists of 6 capacitors connected in parallel. The number of capacitors is chosen in dependence on the load and in order to meet the requirements for operating sequences specified in international standards.
  • the charging unit 14 is arranged to charge the capacitor unit 15. When a circuit breaker operation is performed, power is drawn from the capacitor unit 15. The voltage thereby decreases and the charging unit 14 is then activated for recharging the capacitor unit 15.
  • the charging unit 14 is connected to a main supply (ac) and an additional supply (dc) serving as a backup.
  • the converter unit 16 converts the dc voltage from the capacitor unit 15 to a controlled switched ac voltage required by the servomotor.
  • the control unit 17 comprises one or more microprocessors for controlling the function of the circuit breaker 10. Examples of such functions include: to control and regulate the motor during operation, to take care of the communication, to monitor, the I/O functionality etc.
  • the I/O unit 18 provides an interface between the drive unit 11 and the user. Trip and close commands (indicated in the figure by a respective arrow) are received from a substation or a control centre and forwarded to the control unit 17, which then effectuates the required operations by transmitting suitable signals.
  • the drive unit 11 further comprises a power backup unit 19 for powering the control unit 17 during a power failure. It is thereby possible for the motor drive to be operational for some time even though the main supply to the drive unit 11 is lost.
  • FIG 3 illustrates schematically the arrangement of the separate power backup unit 19 of the drive unit 11.
  • the power backup unit 19 is connected to the charging unit 14 and to the control unit 17.
  • the power backup unit 19 preferably comprises one or more high capacitance capacitor modules, which have a high energy density when compared to common capacitors.
  • a high capacitance capacitor is charged very fast and provides a reliable operation. Further, it is suitable for use in environments with temperatures ranging from -50°C and +70°C, has favorable maintenance costs and also has a long service life.
  • a high capacitance capacitor module may have values in the range of a few Farad (F) up to as much as 500 F.
  • the power backup unit 19 comprises batteries of lead acid, lithium-ion, NiMH or other type.
  • the high capacitance capacitor modules are preferred.
  • the present invention also enables the customizing of the "holdup time", i.e. the time during which the control unit 17 is operable even in case of a power failure on the main supply. By adding more capacitors or larger capacitors, the user can achieve an increased service time of the motor drive during a complete loss of supply.
  • the power backup unit 19 may be arranged to also power a display unit of the drive unit 11.
  • the control panel of a drive unit does not display any information during a power failure, since it is not powered during such failures.
  • the power backup unit 19 can be connected so as to also power a local user control panel (not shown in the figures). The whole control panel may be energized or only parts of it.
  • the present invention also brings about an improved security for performing maintenance work on the circuit breaker 10.
  • the capacitor unit 15 can be discharged very rapidly through the servomotor. Such discharge can be done within a minute, or even within approximately 30 seconds. Faults can thus be repaired quickly and an improved security is provided during the on-site maintenance.
  • the power backup unit 19 is a separate unit.
  • the word "separate" is to be interpreted that the power backup unit 19 is provided so as to have the sole task of providing a backup energy to the drive unit 11 in case of a power failure. That is, the power backup unit 19 is normally not used during the usual operation of the circuit breaker 10.
  • the circuit breaker 10 described above is preferably a high voltage circuit breaker, suitable for outdoor use.
  • high voltage is generally meant, in power transmission work, 72,500 V and higher.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP07445016A 2007-04-25 2007-04-25 Leistungsbackup in einem Antriebssystem für einen Schutzschalter und Schutzschalter Withdrawn EP1986302A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07445016A EP1986302A1 (de) 2007-04-25 2007-04-25 Leistungsbackup in einem Antriebssystem für einen Schutzschalter und Schutzschalter
CN200880013388A CN101669261A (zh) 2007-04-25 2008-04-17 用于断路器的驱动单元中的功率备用和断路器
PCT/EP2008/054646 WO2008132058A1 (en) 2007-04-25 2008-04-17 Power backup in a drive unit for a circuit breaker, and a circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07445016A EP1986302A1 (de) 2007-04-25 2007-04-25 Leistungsbackup in einem Antriebssystem für einen Schutzschalter und Schutzschalter

Publications (1)

Publication Number Publication Date
EP1986302A1 true EP1986302A1 (de) 2008-10-29

Family

ID=38434008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07445016A Withdrawn EP1986302A1 (de) 2007-04-25 2007-04-25 Leistungsbackup in einem Antriebssystem für einen Schutzschalter und Schutzschalter

Country Status (3)

Country Link
EP (1) EP1986302A1 (de)
CN (1) CN101669261A (de)
WO (1) WO2008132058A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102904224A (zh) * 2012-09-25 2013-01-30 珠海许继电气有限公司 一种配电网故障快速保护系统
WO2015082629A1 (en) * 2013-12-04 2015-06-11 Eaton Industries (Netherlands) B.V. Semi voltage dependent circuit breaker
WO2017001371A1 (en) * 2015-06-30 2017-01-05 Eaton Industries (Netherlands) B.V. Combination of an electromagnetic switch, a controller and an external power supply

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2437348T3 (es) * 2010-03-18 2014-01-10 Abb Technology Ag Unidad de interruptor y método relacionado
DE102017211900B4 (de) * 2017-07-12 2020-02-20 Siemens Aktiengesellschaft Leistungsschalter und Verfahren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510658A (en) * 1993-05-12 1996-04-23 Honda Giken Kogyo Kabushiki Kaisha Circuit breaker device for electric vehicle
US20050135030A1 (en) * 2003-12-23 2005-06-23 Jonas John P. Switchgear with embedded electronic controls
FR2865572A1 (fr) * 2004-01-23 2005-07-29 Alstom T & D Sa Dispositif de commande de dispositif de coupure d'energie electrique
EP1589628A2 (de) * 2004-04-19 2005-10-26 ABB Service S.r.l Elektronisches Schutzgerät für Selbstschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510658A (en) * 1993-05-12 1996-04-23 Honda Giken Kogyo Kabushiki Kaisha Circuit breaker device for electric vehicle
US20050135030A1 (en) * 2003-12-23 2005-06-23 Jonas John P. Switchgear with embedded electronic controls
FR2865572A1 (fr) * 2004-01-23 2005-07-29 Alstom T & D Sa Dispositif de commande de dispositif de coupure d'energie electrique
EP1589628A2 (de) * 2004-04-19 2005-10-26 ABB Service S.r.l Elektronisches Schutzgerät für Selbstschalter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102904224A (zh) * 2012-09-25 2013-01-30 珠海许继电气有限公司 一种配电网故障快速保护系统
CN102904224B (zh) * 2012-09-25 2015-09-30 珠海许继电气有限公司 一种配电网故障快速保护系统
WO2015082629A1 (en) * 2013-12-04 2015-06-11 Eaton Industries (Netherlands) B.V. Semi voltage dependent circuit breaker
CN106415968A (zh) * 2013-12-04 2017-02-15 伊顿工业(荷兰)有限公司 半电压依赖型断路器
CN106415968B (zh) * 2013-12-04 2019-03-08 伊顿工业(荷兰)有限公司 半电压依赖型断路器
US10355471B2 (en) 2013-12-04 2019-07-16 Eaton Intelligent Power Limited Semi voltage dependent circuit breaker with earth fault and overcurrent protection
WO2017001371A1 (en) * 2015-06-30 2017-01-05 Eaton Industries (Netherlands) B.V. Combination of an electromagnetic switch, a controller and an external power supply

Also Published As

Publication number Publication date
CN101669261A (zh) 2010-03-10
WO2008132058A1 (en) 2008-11-06

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