EP3053179A1 - Vorrichtung und verfahren zum schalten eines gleichstromes - Google Patents
Vorrichtung und verfahren zum schalten eines gleichstromesInfo
- Publication number
- EP3053179A1 EP3053179A1 EP13814053.8A EP13814053A EP3053179A1 EP 3053179 A1 EP3053179 A1 EP 3053179A1 EP 13814053 A EP13814053 A EP 13814053A EP 3053179 A1 EP3053179 A1 EP 3053179A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- capacitor
- branch
- switch
- operating current
- damping device
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims abstract description 68
- 238000013016 damping Methods 0.000 claims abstract description 37
- 239000004065 semiconductor Substances 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/548—Electromechanical and static switch connected in series
-
- 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
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
Definitions
- the invention relates to a device for switching a direct current.
- the device comprises an operating current branch, in which a mechanical switch is arranged, a circuit breaker connected to the operating current branch for interrupting the flow of current in the operating current branch, a capacitor branch arranged in a parallel circuit to the operating current branch, in which a capacitor is arranged, and a damping device, which is a resistance element includes.
- Switching devices of this type are usually connected to an electrical DC voltage line or a DC voltage network and serve to interrupt the direct current carrying line in the event of a fault.
- the mechanical switch and the circuit breaker are closed, so that the operating current flows through the operating current branch.
- the short-circuit current is commutated to the capacitor branch, whereby the capacitor is charged. In this case, a reverse voltage is built, whereby the device is de-energized.
- the damping device according to WO 2013/093066 A1 is arranged in parallel to the operating current branch and provided for enabling a re-connection of the device after a shutdown in the event of an error within a short time.
- the switching element In the known device is in a series circuit to the damping device, a further switching element. After a fault, the switching element can be closed with the circuit breaker open and the mechanical switch open, so that the capacitor can discharge via the damping device. This way is a fast one Restart the device allows.
- the same voltage dimensioning is necessary in the known device for the additional switching element, as for the circuit breaker, which should switch the current in the operating current branch. This leads to increased costs of the additional switching element.
- the object of the present invention is therefore to propose a device of the type mentioned, which is inexpensive.
- the damping device is arranged in the capacitor branch in a series circuit to the capacitor or in the operating current branch in a series circuit to the mechanical switch, wherein the damping device can be bridged by means arranged in a parallel circuit to the damping device bridging switch.
- the bypass switch is closed in normal operation. If an error occurs, the capacitor in the capacitor branch can be charged until the current drops to zero due to the counter-voltage built up.
- bypass switch can be opened so that the capacitor can discharge via the damping device as soon as the mechanical switch is closed again.
- the device according to the invention has the advantage that the dimensioning of the dielectric strength of the bypass switch can be reduced. Because after charging the capacitor and opening the circuit breaker, the entire capacitor voltage drops only transiently at the bypass switch alone. In this way, the overall cost of the device can be reduced, since the bypass switch does not have to be designed for a continuous voltage higher than the maximum capacitor voltage, but only for an impulse load during the discharging process.
- the resistance element of the damping device must be configured according to the energy optionally stored in the capacitor. Since an inductance can be assigned to each resistance element in addition to a resistance value, these two values must fulfill predetermined requirements for the desired time interval between the disconnection and the restarting.
- the resistance element has an electrical resistance and an inductance whose values allow a discharge of the fully charged capacitor via the damping device within a period of 50 ms to 500 ms, particularly preferably 100 ms to 250 ms.
- the damping device comprises a separate coil element.
- the coil element forms a parallel circuit with the resistance element.
- the damping device formed in this way limits the peak value of the discharge current and absorbs the energy stored in the capacitor particularly effectively.
- the device further comprises a varistor, for example a metal oxide varistor, which is connected in a parallel circuit to the capacitor and to the operating current branch.
- a limiting voltage can be defined, which can be maximally established when charging the capacitor.
- the varistor must be designed such that the limiting voltage is greater than a mains voltage of the DC voltage network to which the device is connected.
- the device further comprises a power semiconductor switch which is connected in series with the mechanical switch in the is arranged operating branch.
- the current in the operating current branch initially rises approximately linearly.
- the power semiconductor switch is set up to switch off in such a case with the smallest possible time delay, preferably in the microsecond range, whereby the further rising current is commutated into the capacitor branch.
- the opening of the mechanical switch is set in motion. The mechanical switch is then opened, so that the power semiconductor switch is not damaged by the high applied voltage (up to several hundred kilovolts).
- the device may be designed as a unidirectional or bidirectional switch.
- the use of the power electronic switch also results in advantageous that the mechanical switch can be opened without current (whereby arc generation can be avoided), and that the mechanical switch does not have to provide the necessary commutation voltage.
- the capacitor arranged in the capacitor branch preferably has a capacitance value which lies between 25 ⁇ and 200 ⁇ .
- the bypass switch is a mechanical circuit breaker.
- the mechanical disconnector uses, for example, an electromagnetic force to open and close its contacts.
- the bypass switch is a circuit breaker, for example, a conventional AC voltage switch.
- the bridging switch can always be switched in a currentless state of the device.
- the requirements for the switching time of the bypass switch are therefore in the usual range of AC technology, preferably in the range of less than 100 ms.
- the bypass switch in the operating current branch ange- is arranged to pre-charge by means of the device, for example, a cable, for example, a cable on the device, via the damping device.
- the bypass switch is opened before the line is connected by means of the circuit breaker. Any charge current thus flows through the attenuator, thereby reducing a peak and load on all components in the network.
- the bypass switch can be closed and normal operation can be started.
- bypass switch is arranged in the operating current branch, then a further advantage of the device can be seen in the fact that, in the event of a fault, a fault current is to be commutated from the operating current branch to the capacitor branch, if necessary immediately the mechanical switch and the bypass switch can be opened immediately.
- the invention relates to a method for switching the direct current by means of the device according to the species.
- the object of the invention is to propose an alternative method for switching the direct current by means of the device according to the species.
- the object is achieved by the method in which the bypass switch is opened in the event of a fault after opening the circuit breaker and the capacitor is discharged via the operating current branch and the damping device.
- the bypass switch is closed only after discharging the capacitor and after closing the circuit breaker. sen. If the bypass switch is arranged in the operating current branch, then the current flows after the device is switched on by closing the circuit breaker first for a limited time via the damping device. As a result, the current peak value and thus the load of a device connected downstream of the device can be reduced. For normal operation, the bypass switch is closed again after a predetermined time.
- FIG. 1 shows a schematic representation of a first exemplary embodiment of a device according to the invention
- Figure 2 shows a second embodiment of the device according to the invention in a schematic view.
- Figure 1 shows a first embodiment of the device 1 according to the invention for switching a direct current.
- the device 1 has two terminals 141, 142, by means of which the device 1 is connected to a DC voltage network.
- the current direction is indicated by the arrow 13.
- the device 1 comprises an operating current branch 2 and a capacitor branch 5, the capacitor branch 5 being connected in parallel to the operating current branch 2.
- the device 1 has a varistor branch 15, wherein the varistor branch 15 is arranged in a parallel connection to the capacitor branch 5 and to the operating current branch 2.
- a mechanical switch 3 and a power semiconductor switch 12 are arranged, wherein the mechanical switch 3 and the power semiconductor switch 12 are connected in a series circuit.
- a capacitor 6 is arranged.
- a metal oxide varistor 11 is arranged in the varistor branch 15, a metal oxide varistor 11 is arranged.
- the device 1 further comprises a damping device 7, which is arranged in a series circuit to the mechanical switch 3.
- a bypass switch 9 is arranged, by means of which the damping device can be bridged.
- the damping device 7 comprises a coil element 10 and a resistance element 8, the coil element 10 and the resistance element 8 being arranged in a parallel connection to one another.
- the mechanical switch 3 and the bypass switch 9 are designed as mechanical disconnectors.
- the power semiconductor switch 12 is designed such that the device 1 can be used as a bidirectional switch.
- the device 1 further comprises a circuit breaker 4, which is adapted to interrupt the flow of current in the operating current branch 2.
- a load current flows through the circuit breaker 4, the mechanical switch 3, the half-circuit breaker 12 and the bypass switch 9 in the operating current branch 2.
- an error occurs in the operating current branch 2 to a corresponding increase in current.
- the mechanical switch 3 and the power semiconductor switch 12 controls a control unit, not shown in Figure 1, the mechanical switch 3 and the power semiconductor switch 12 to turn off.
- the power semiconductor switch 12 is therefore locked and the mechanical switch 3 is opened.
- the current from the operating current branch is commutated to the capacitor branch 5.
- the circuit breaker 4 is also opened, initially the current continues to flow through the capacitor branch.
- the capacitor 6 is charged until a voltage across the capacitor 6 drops, which is greater than the mains voltage.
- the maximum voltage to which the capacitor 6 is charged is defined by the dissipating varistor 11. ned. The current flowing through the device 1 is thereby forced to zero, thus extinguishing a possible arc in the circuit breaker 4. After such a shutdown of the device 1, the capacitor 6 is charged to about twice the nominal voltage. If now the device 1 is switched on again within a short time, the energy stored in the capacitor must first be released.
- the bypass switch 9 can be opened. If the switch-off operation of the device 1 is terminated by the extinguishing of the arc in the protection switch 4, then the switches 3, 12 can be closed again. About the mechanical switch 3, which is now closed, the power semiconductor switch 12, the
- Damping device 7 the capacitor 6 now closes a circuit through which the capacitor 6 can be discharged.
- the coil element 10 and the resistance element 8 of the damping device 7 thereby ensure a limitation of the peak value of the discharge current and for absorption of the stored energy of the capacitor 6.
- the bypass switch 9 can be closed again. The circuit is thus ready for the renewed connection of the device 1.
- FIG. 2 shows a second embodiment of the device 1 according to the invention is shown schematically.
- Identical elements in FIGS. 1 and 2 are each provided with the same reference numerals. In order to avoid repetition, therefore, in the following description of FIG. 2, only those elements are discussed which distinguish the embodiment of FIG. 2 from the exemplary embodiment of FIG.
- the damping device 7 is arranged in a series Circuit arranged to the capacitor 6 in the capacitor branch 5.
- the bypass switch 9 is connected in a parallel circuit to the damping device 7, wherein the damping device 7 can be bridged by means of the bypass switch 9.
- the mode of operation of the device 1 according to FIG. 2 substantially corresponds to the mode of operation of the device 1 of FIG. 1.
- the current flowing through the device 1 is thereby forced to zero, which extinguishes a possible arc in the protection switch 4.
- the capacitor 6 is charged to about twice the nominal voltage. If now the device 1 is switched on again within a short time, the energy stored in the capacitor must first be released.
- the bypass switch 9 can be opened. Furthermore, the switches 3, 12 can be closed again. About the mechanical Switch 3, the power semiconductor switch 12, the damping device 7 and the capacitor 6 now closes a circuit through which the capacitor 6 can be discharged. The coil element 10 and the resistance element 8 of the damping device 7 thereby ensure a limitation of the peak value of the discharge current and for absorption of the stored energy of the capacitor 6. As soon as the capacitor 6 is discharged, the bypass switch 9 can be closed again. The circuit is thus ready for the renewed connection of the device 1. The connection of the
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Keying Circuit Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2013/075144 WO2015078525A1 (de) | 2013-11-29 | 2013-11-29 | Vorrichtung und verfahren zum schalten eines gleichstromes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3053179A1 true EP3053179A1 (de) | 2016-08-10 |
EP3053179B1 EP3053179B1 (de) | 2017-10-18 |
Family
ID=49883057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13814053.8A Active EP3053179B1 (de) | 2013-11-29 | 2013-11-29 | Vorrichtung und verfahren zum schalten eines gleichstromes |
Country Status (4)
Country | Link |
---|---|
US (1) | US9875861B2 (de) |
EP (1) | EP3053179B1 (de) |
CN (1) | CN105745730B (de) |
WO (1) | WO2015078525A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2540813A (en) * | 2015-07-30 | 2017-02-01 | General Electric Technology Gmbh | Electrical assembly |
KR102558677B1 (ko) | 2016-04-04 | 2023-07-21 | 엘에스일렉트릭(주) | 전류 차단기 |
DE102016212915A1 (de) | 2016-07-14 | 2018-01-18 | Siemens Aktiengesellschaft | Schaltanordnung sowie Verfahren zur Fehlerklärung |
CN106099878B (zh) * | 2016-08-04 | 2019-01-29 | 华中科技大学 | 一种电容充电型双向直流断路器及其应用 |
GB2557348B (en) | 2016-12-08 | 2020-09-30 | Ge Aviat Systems Ltd | Power distribution system including a commutation device |
EP3373317A1 (de) * | 2017-03-06 | 2018-09-12 | General Electric Technology GmbH | Verfahren zum verschliessen eines mechatronischen schutzschalters |
KR102421625B1 (ko) | 2017-06-27 | 2022-07-19 | 캐논 아네르바 가부시키가이샤 | 플라스마 처리 장치 |
EP3429046A1 (de) * | 2017-07-14 | 2019-01-16 | Siemens Aktiengesellschaft | Elektronischer schalter mit überspannungsbegrenzer |
GB201809140D0 (en) | 2018-06-04 | 2018-07-18 | Univ Court Of The Univ Of Aberdeen | Apparatus suitable for interrupting a direct current |
DE102018213354A1 (de) * | 2018-08-08 | 2020-02-13 | Siemens Aktiengesellschaft | Schaltgerät und Verfahren |
EP3654477A1 (de) * | 2018-11-15 | 2020-05-20 | Siemens Aktiengesellschaft | Elektronischer schalter mit überspannungsschutz |
FR3091408B1 (fr) | 2018-12-27 | 2021-01-15 | Inst Supergrid | Dispositif de coupure de courant pour courant continu haute tension avec circuit d’oscillation adaptatif et procédé de pilotage |
FR3091407B1 (fr) | 2018-12-27 | 2021-10-29 | Inst Supergrid | Dispositif de coupure de courant pour courant continu haute tension avec circuit capacitif tampon et procédé de pilotage |
CN109861183B (zh) * | 2019-01-18 | 2020-08-18 | 华南理工大学 | 一种直流断路器及其使用方法 |
FR3094136B1 (fr) | 2019-03-22 | 2021-04-02 | Inst Supergrid | Dispositif de coupure de courant pour courant continu haute tension avec résonateur et commutation |
EP3869650B1 (de) * | 2020-02-21 | 2023-11-01 | General Electric Technology GmbH | Stromkreisunterbrechnungsvorrichtung |
CN115834288B (zh) * | 2022-12-07 | 2024-05-03 | 湖南中联重科履带起重机有限公司 | 用于总线网络的控制方法、控制装置、存储介质及处理器 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5666257A (en) | 1994-10-18 | 1997-09-09 | Yang; Tai-Her | DC circuit breaking spark suppressor circuit device |
US5764459A (en) * | 1994-10-18 | 1998-06-09 | Yang; Tai-Her | DC circuit breaking spark suppressor device |
CN102687221B (zh) | 2009-11-16 | 2015-11-25 | Abb技术有限公司 | 使输电线路或配电线路的电流断路的装置和方法以及限流布置 |
WO2011141055A1 (en) * | 2010-05-11 | 2011-11-17 | Abb Technology Ag | A high voltage dc breaker apparatus |
CN101814727B (zh) * | 2010-05-18 | 2012-08-08 | 福州欣联达电子科技有限公司 | 永磁电机高转速限流电路 |
EP2639805B1 (de) * | 2010-12-23 | 2014-12-10 | ABB Technology AG | Verfahren, Schutzschalter und Schalteinheit zum Abschalten von Hochspannungsgleichströmen |
ES2911756T3 (es) * | 2011-12-22 | 2022-05-20 | Siemens Energy Global Gmbh & Co Kg | Dispositivo disyuntor híbrido de cd |
FR2985082B1 (fr) | 2011-12-23 | 2014-02-21 | Alstom Technology Ltd | Dispositif disjoncteur mecatronique et procede de declenchement associe et application a la coupure de courant continu eleve |
WO2013127462A1 (en) * | 2012-03-01 | 2013-09-06 | Alstom Technology Ltd | Composite high voltage dc circuit breaker |
US9831657B2 (en) * | 2012-12-19 | 2017-11-28 | Siemens Aktiengesellschaft | Device for switching a direct current in a pole of a DC voltage network |
CN103325591B (zh) * | 2013-05-28 | 2015-11-25 | 北京联动天翼科技有限公司 | 直流机械开关的包含可控开关的灭弧装置及灭弧方法 |
-
2013
- 2013-11-29 CN CN201380081009.3A patent/CN105745730B/zh active Active
- 2013-11-29 WO PCT/EP2013/075144 patent/WO2015078525A1/de active Application Filing
- 2013-11-29 US US15/100,389 patent/US9875861B2/en active Active
- 2013-11-29 EP EP13814053.8A patent/EP3053179B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
US20160300671A1 (en) | 2016-10-13 |
CN105745730A (zh) | 2016-07-06 |
WO2015078525A1 (de) | 2015-06-04 |
CN105745730B (zh) | 2018-11-02 |
US9875861B2 (en) | 2018-01-23 |
EP3053179B1 (de) | 2017-10-18 |
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