EP3152776B1 - Strom-null-impuls mit konstanter stromsteilheit zur unterbrechung eines gleichstromes - Google Patents

Strom-null-impuls mit konstanter stromsteilheit zur unterbrechung eines gleichstromes Download PDF

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Publication number
EP3152776B1
EP3152776B1 EP15738301.9A EP15738301A EP3152776B1 EP 3152776 B1 EP3152776 B1 EP 3152776B1 EP 15738301 A EP15738301 A EP 15738301A EP 3152776 B1 EP3152776 B1 EP 3152776B1
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EP
European Patent Office
Prior art keywords
current
electrical component
zero
switch
arrangement
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
EP15738301.9A
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German (de)
English (en)
French (fr)
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EP3152776A1 (de
Inventor
Thomas Heinz
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Siemens AG
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Siemens AG
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    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/167—Impedances connected with contacts the impedance being inserted only while opening the switch
    • 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 present invention relates to an arrangement for generating a zero-current pulse for generating a current zero crossing in a current flowing through a DC electrical component, in particular a vacuum tube.
  • a vacuum tube is often used as a load or power switch of currents in AC networks.
  • the vacuum tube for switching off the anode current or the switching current requires a negative voltage, which is provided with the negative half-wave of the AC voltage.
  • a current pulse, or current zero pulse is required, with which the direct current can be superimposed to produce the required current zero crossing.
  • a simple RLC resonant circuit (resonant circuit based on resistance, inductance, capacitance) is generally used.
  • a breaker arrangement with resonant circuit is for example from DE 693 02 716 T2 known. If the DC power is turned off, the vacuum interrupter is opened, impressed the current zero pulse and interrupted the power.
  • a generated by an RLC resonant circuit current zero pulse has a sinusoidal current form.
  • the level of the frequency of the RLC resonant circuit is usually in the KHz range and thus well above the frequencies that typically occur in AC networks.
  • the power interruption through the vacuum interrupter is relatively safe up to a certain maximum current gradient dI / dt (derivative of the current after time) in the current zero crossing.
  • the current gradient of the RLC resonant circuit corresponds to a cosine function.
  • the dimensioning of the RLC resonant circuit can only be optimized for the height of a certain specifiable current. At the time of the power interruption, different, possibly not optimal, current gradients for the zero crossing of the switching current thus result at different switching currents and a constant current zero pulse.
  • an RLC resonant circuit which is designed to produce a high-amplitude current zero pulse has an initially very high current steepness, decreasing with increasing time and amplitude according to the cosine function. If the direct current to be compensated is large, then the current zero crossing takes place at a point in time at which the current steepness has already dropped according to the cosine function and is thus sufficiently low. However, if the direct current to be compensated is low, a current zero crossing already takes place at an early point in time at which the current gradient of the current zero pulse is still very high, possibly too high.
  • DE 10 2011 079 723 A1 and DE 10 2011 083 514 A1 disclose an arrangement for generating a current zero pulse according to the preamble of claim 1. Further also disclosed DE 10 2011 082 568 A1 an arrangement for generating a current zero pulse.
  • the object of the invention is to provide an arrangement for generating a current-zero pulse, which allows the interruption of switching currents of different heights dI / dt as constant as possible current.
  • an arrangement for generating a current zero pulse for generating a current zero crossing in an electrical component through which a direct current flows in particular a vacuum interrupter
  • the arrangement comprising an electrical energy store with two poles, via which the electrical energy store can be charged from a voltage source, and a switch.
  • the DC-carrying electrical component and the switch a mesh can be formed, so that the energy storage at a closing of the switch to generate a current flowing through the electrical component against the DC current-zero pulse can be emptied, the Energy storage having a plurality of energy storage elements for the common generation of a current zero pulse.
  • an advantage of such an arrangement is that the shape, i. the course of the amplitude over time, the current-zero pulse is malleable by superimposing the discharge curves of several energy storage elements. In this way, virtually any formable current-zero pulses can be generated, which may be required for interrupting direct currents in an electrical component.
  • the term of the electrical component is to be understood in such a general way that it also includes a more complex - possibly integrated - circuit, or a device, in particular a conventional AC switching device.
  • the energy storage elements are advantageously designed differently, so that the energy storage elements have different discharge curves.
  • the discharge of the plurality of energy storage elements for common formation of the current zero pulse can be done in different ways, for example, parallel, time-shifted, interdependent or concatenated.
  • the energy storage device is designed such that a resonant circuit can be formed via the mesh when the switch is closed, so that the current-zero pulse has alternating directions.
  • a resonant circuit can be formed via the mesh when the switch is closed, so that the current-zero pulse has alternating directions.
  • the plurality of energy storage elements for generating a common zero-current pulse forms a chain conductor, wherein the energy storage elements are designed as chain links, each having a capacity.
  • chain conductor is to be understood as meaning a chain-like electrical connection of identically designed chain links in the form of electrical circuit arrangements.
  • the chain links of the chain conductor on inductors, resistors and capacitors.
  • An embodiment with passive components can be produced inexpensively, wherein in particular an inductance, resistance and capacitance, an arrangement can be formed, which has a simple construction and also allows a controlled discharge of a capacity as an energy storage element.
  • each chain link is designed as an RLC element, ie each chain link is designed as a series circuit of an inductance, a resistance and a capacitance, wherein the series connection of a first chain link is formed between the poles of the energy store and the series connection of a subsequent chain link parallel to the capacity of the previous one Chain link is connected.
  • Such a configuration offers the possibility of forming resonant circuits of different frequencies, resulting in current zero pulse components with different current gradients.
  • it offers the possibility of forming current zero pulses whose negative half-wave has a low current gradient with high amplitude.
  • a vacuum interrupter for power interruption of a high DC current requires a current zero pulse with high amplitude and low current gradient.
  • the arrangement has a plurality of energy storage elements which are dimensioned such that the current-zero pulse resulting from the common emptying of the energy storage elements has, in sections, a total of approximately constant current gradient.
  • the arrangement can be executed in such a way that it has a chain conductor with a plurality of chain links, whose inductances, resistances and capacitances are dimensioned such that the current zero pulse has an approximately constant current gradient in sections.
  • Such an arrangement has the advantage that it may be formed, for example, for a specific, approximately constant current gradient, which has the formed current slope independent of the height of a DC to be compensated for the time of the current zero crossing on the part of the current zero pulse.
  • the switching instant constant DC regardless of its height at a predetermined current gradient.
  • the energy store has several, particularly preferably three energy storage elements which are dimensioned such that the current zero pulse resulting from the common emptying of the energy storage elements has an approximately triangular or ramped current profile overall.
  • the energy store has a chain conductor with three chain links whose inductances, resistances and capacitances are dimensioned such that the current zero pulse has an approximately triangular or ramped current profile overall.
  • Such time profiles of the current-zero pulse can be easily implemented with passive components and provide in sections a current-zero pulse with a constant current gradient.
  • the arrangement is further designed such that the poles of the energy storage device can be connected to the voltage source via a charging resistor.
  • the arrangement is constructed in such a way that this voltage source is the same voltage source which supplies the electrical energy for the direct current to be compensated.
  • the charging resistor is advantageously arranged in such a way that it forms a second loop with the voltage source, the electrical component and the switch and is not contained in the previously mentioned loop of the switch, the electrical component and the energy store, and not in the current path of the is arranged to be compensated DC.
  • the arrangement is designed such that the arrangement has an energy absorber, which is arranged parallel to the electrical component. This can be interrupted by the DC electrical component are absorbed due to the interruption energy released.
  • the energy absorber is designed as a metal oxide arrester, for example a metal oxide resistor or a metal oxide varistor.
  • Metal oxide arresters are essentially aging-resistant executable and suitable to be able to absorb the energy accumulating during a discharge process.
  • the arrangement is used to generate a current-zero pulse in a current flowing through a DC electrical component, wherein the electrical component is a vacuum interrupter.
  • a DC switch can be formed by the arrangement.
  • Fig. 1 shows a preferred embodiment of the invention.
  • Out Fig. 1 is an arrangement for generating a current zero pulse 1 for generating a current zero crossing in one of a direct current 2 through which electrical component 3 can be seen, wherein the electrical component 3 is designed as a vacuum interrupter.
  • the arrangement has an electrical energy store 4 with two poles 12, 13, which is of an in FIG. 2 shown voltage source 10 is chargeable. Furthermore, the arrangement forms over the energy storage 4, the DC-passed electrical component 3 and a switch 5 from a mesh, so that the energy storage 4 at a closing of the switch 5 generating a via the electrical component 3, the DC 2 initially amplifying current zero Pulse 1 is emptied.
  • the energy store 4 has a plurality of energy storage elements in the form of chain links 6, 6 'and 6 "of a chain conductor for jointly generating a current zero pulse 1.
  • the chain links 6, 6', 6" of the chain conductor have inductances 7, 7 ', 7 ", resistors 8, 8', 8" and capacitances 9, 9 ', 9 ", where each chain link 6, 6', 6" is made up of a series connection of an inductance 7, 7 ', 7 ", A series connection of a first chain link 6 is formed between the poles 12, 13 of the energy store 4.
  • the series connection of a following chain link 6 ', 6 " is connected in parallel with the capacitance 9, 9 'of the respective preceding chain link 6, 6'.
  • a resonant circuit is formed by the chain conductor whose oscillation - if the electrical component 3 has a conductive state - by closing the switch 5 can be initiated.
  • the positive half-wave of the current zero pulse 1 has the same direction as the direct current 2, then that initially add in the electrical component 3, both currents.
  • the inductances 7, 7', 7 maintain the current zero pulse 1, until the voltage U in the capacitances 9, 9 ', 9 "is reversed in polarity, as the voltage builds up, the amplitude of the current zero pulse 1 decreases until its zero crossing.
  • a negative half-wave follows the positive half-wave of the current zero pulse 1.
  • This negative half-wave of the current zero pulse 1 counteracts the direct current 2, so that with appropriate dimensioning of the DC 2 can be compensated by the negative half-wave of the current zero pulse 1 and a current zero crossing in the electrical component 3 can be achieved for the sum of both currents.
  • the inductances 7, 7 ', 7 “, resistors 8, 8', 8” and capacitances 9, 9 ', 9 “of the chain links 6, 6', 6" are dimensioned such that the current zero pulse 1 in sections in total has an approximately constant current gradient.
  • FIG. 2 shows an embodiment of a use of the invention for forming a DC switch 17.
  • the embodiment of the energy storage 4 and its interaction with the electrical component 3 and the switch 5 are to the embodiment in FIG. 1 identical. Beyond the arrangement described in Figure 1 is off FIG. 2 it can be seen that the in FIG. 1 shown energy storage 4, represented here by the chain conductor with the inductors 7, 7 ', 7 ", the resistors 8, 8', 8" and the capacitances 9, 9 ', 9 "is connected via a charging resistor 11 to the voltage source 10.
  • the electrical energy for the DC 2 to be compensated is supplied by the same voltage source 10.
  • the charging resistor 11 is arranged such that it forms a second loop with the voltage source 10, the electrical component 3 and the switch 5 and not included in the above-mentioned mesh of the switch 5, the electrical component 3 and the energy storage 4, and is not arranged in the current path of the DC to be compensated 2.
  • Another, third mesh, consisting of the voltage source 10, the energy storage 4 and the charging resistor 11 allows the charging of the capacitances 9, 9 ', 9 "to the voltage U DC of the voltage source 10, if the switch 5 is open.
  • the switch 5 If the switch 5 is closed, the capacitances 9, 9 ', 9 "of the energy accumulator 4 are discharged via the electrical component 3 and the switch 5 in the form of the current zero pulse 1.
  • the electrical component 3 designed in the form of a vacuum interrupter is included in the design the switch 5 is coupled and is opened at the closing of the switch 5, so that upon reaching the caused by the negative half cycle of the current zero pulse 1 current zero crossing of the DC 2 is switched off.
  • an overvoltage which is absorbable by the energy absorber 14, which is embodied as a metal-oxide arrester, can be absorbed via the electrical component 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Measuring Fluid Pressure (AREA)
  • Particle Accelerators (AREA)
  • Keying Circuit Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP15738301.9A 2014-07-30 2015-07-09 Strom-null-impuls mit konstanter stromsteilheit zur unterbrechung eines gleichstromes Active EP3152776B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014214956.8A DE102014214956A1 (de) 2014-07-30 2014-07-30 Strom-Null-Impuls mit konstanter Stromsteilheit zur Unterbrechung eines Gleichstromes
PCT/EP2015/065714 WO2016015975A1 (de) 2014-07-30 2015-07-09 Strom-null-impuls mit konstanter stromsteilheit zur unterbrechung eines gleichstromes

Publications (2)

Publication Number Publication Date
EP3152776A1 EP3152776A1 (de) 2017-04-12
EP3152776B1 true EP3152776B1 (de) 2018-02-28

Family

ID=53610865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15738301.9A Active EP3152776B1 (de) 2014-07-30 2015-07-09 Strom-null-impuls mit konstanter stromsteilheit zur unterbrechung eines gleichstromes

Country Status (11)

Country Link
US (1) US10332705B2 (pt)
EP (1) EP3152776B1 (pt)
JP (1) JP6382440B2 (pt)
KR (1) KR101942201B1 (pt)
CN (1) CN106575585B (pt)
BR (1) BR112017001801B1 (pt)
CA (1) CA2954707C (pt)
DE (1) DE102014214956A1 (pt)
ES (1) ES2671129T3 (pt)
RU (1) RU2669573C2 (pt)
WO (1) WO2016015975A1 (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3059827A1 (en) * 2015-02-20 2016-08-24 ABB Technology Ltd Switching system for breaking a current and method of performing a current breaking operation
DE102015217578A1 (de) * 2015-09-15 2017-03-16 Siemens Aktiengesellschaft Gleichstrom-Schalteinrichtung und deren Verwendung
GB201617458D0 (en) 2016-10-14 2016-11-30 Vacuum Interrupters Ltd Improvements in or relating to vacuum interrupters
DE102018214000B4 (de) * 2018-08-20 2022-01-20 Siemens Energy Global GmbH & Co. KG Gleichstrom-Schalteinrichtung und deren Verwendung
CN108987173A (zh) * 2018-10-17 2018-12-11 宁夏晟晏实业集团能源循环经济有限公司 一种用于35kv高压真空开关的防击穿装置
CN113764217B (zh) * 2021-08-24 2022-06-07 西安交通大学 一种自动调节老炼能量的真空灭弧室脉冲电压老炼方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176623A (en) 1981-04-24 1982-10-30 Tokyo Shibaura Electric Co Dc breaker
JP3114328B2 (ja) * 1992-02-20 2000-12-04 株式会社日立製作所 直流遮断器
JPH0950741A (ja) 1995-08-08 1997-02-18 Mitsubishi Electric Corp 自励転流式直流遮断装置
JP2000175451A (ja) 1998-09-29 2000-06-23 Mitsubishi Electric Corp 直流遮断装置
JP2005222705A (ja) * 2004-02-03 2005-08-18 Toshiba Corp 直流遮断器
CN2852361Y (zh) 2005-12-10 2006-12-27 王炎 可恢复大容量高速开关装置
DE102007004527B4 (de) * 2007-01-24 2009-03-12 Siemens Ag Elektrisches Gleichstromnetz für Wasserfahrzeuge sowie für Offshoreanlagen
DE102011079723A1 (de) * 2011-07-25 2013-01-31 Siemens Aktiengesellschaft Gleichspannungs-Leitungsschutzschalter
DE102011082568A1 (de) * 2011-09-13 2013-03-14 Siemens Aktiengesellschaft Gleichspannungs-Leitungsschutzschalter
DE102011083514A1 (de) * 2011-09-27 2013-03-28 Siemens Aktiengesellschaft Gleichspannungs-Leistungsschalter
EP2669921A1 (en) * 2012-05-31 2013-12-04 Alstom Technology Ltd Circuit breaker apparatus
JP5265063B1 (ja) 2012-09-05 2013-08-14 三菱電機株式会社 直流遮断器

Also Published As

Publication number Publication date
ES2671129T3 (es) 2018-06-05
BR112017001801A2 (pt) 2017-11-21
JP6382440B2 (ja) 2018-08-29
CN106575585A (zh) 2017-04-19
US10332705B2 (en) 2019-06-25
RU2017102484A3 (pt) 2018-08-28
BR112017001801A8 (pt) 2023-05-02
CA2954707C (en) 2019-07-16
KR101942201B1 (ko) 2019-01-24
WO2016015975A1 (de) 2016-02-04
KR20170019471A (ko) 2017-02-21
CN106575585B (zh) 2019-01-04
JP2017526121A (ja) 2017-09-07
BR112017001801B1 (pt) 2023-05-09
EP3152776A1 (de) 2017-04-12
RU2017102484A (ru) 2018-08-28
CA2954707A1 (en) 2016-02-04
RU2669573C2 (ru) 2018-10-12
US20170263399A1 (en) 2017-09-14
DE102014214956A1 (de) 2016-02-04

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