EP3304670A1 - Dispositif limiteur de courant à bobine et commutateur - Google Patents

Dispositif limiteur de courant à bobine et commutateur

Info

Publication number
EP3304670A1
EP3304670A1 EP16734581.8A EP16734581A EP3304670A1 EP 3304670 A1 EP3304670 A1 EP 3304670A1 EP 16734581 A EP16734581 A EP 16734581A EP 3304670 A1 EP3304670 A1 EP 3304670A1
Authority
EP
European Patent Office
Prior art keywords
current
limiting
coil
short
circuit
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Withdrawn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
EP16734581.8A
Other languages
German (de)
English (en)
Inventor
Christian Schacherer
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 AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP3304670A1 publication Critical patent/EP3304670A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/023—Current limitation using superconducting elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N60/00—Superconducting devices
    • H10N60/30—Devices switchable between superconducting and normal states
    • H10N60/35—Cryotrons
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N60/00—Superconducting devices
    • H10N60/80—Constructional details
    • H10N60/85—Superconducting active materials
    • H10N60/855—Ceramic superconductors
    • H10N60/857—Ceramic superconductors comprising copper oxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Definitions

  • the present invention relates to a current limiter device ⁇ direction for limiting a short-circuit current in a higher level power network, the current limiter device has a current-limiting coil means and an electrically connected to the SPU ⁇ len worn in series switch up. Furthermore, the invention relates to a method for limiting a short-circuit current in a power network with such a current limiter device.
  • Known current-limiting devices often have a current-limiting coil device which has a rapid and sudden increase in its impedance in the event of a short circuit.
  • a coil device may be a superconducting coil device, in which the collapse supralei ⁇ Tenden properties by exceeding a critical current density.
  • the impedance and the temperature of the coil device increases very quickly and automatically, without a triggered by an external control unit switching operation is required.
  • this sudden increase in the impedance is reversible, so that after elimination of the cause of the short circuit operation in the superconducting state can usually be resumed very quickly. In many cases, it only takes a very short time to wait until the superconducting conductor has been cooled again to an operating temperature below its transition temperature after the short circuit.
  • the current-limiting coil device can be designed, for example, as a resistive coil device in which the resistance of the coil rises very rapidly as a result of the breakdown of the superconducting properties.
  • the coil device can also be embodied as an inductively or inductively resistive current-limiting coil device, in which, in the event of a short circuit, a large change in the inductance of the Coil device is effected. This may be out ⁇ staltet example, as a normally conducting or superconducting inductor.
  • a superconducting secondary winding which is not part of the circuit to be protected, serve as a compensation coil which shields a magnetic field of the Dros ⁇ selspule and thus reduces the inductance of the Drosselspu ⁇ le in normal operation.
  • the superconducting properties of the compensation coil also break down, in this case by exceeding the critical current density of the induction currents. Due to this sudden change in the shielding effect of the compensation coil, in turn, the inductance of the inductor is changing rapidly and automatically, thus also the short-circuit current ⁇ in the protected circuit quickly and reversibly can be limited at.
  • the entire current limiter device can be available comparatively quickly again for a line of full current after an error correction.
  • the windings of the current-limiting coil means can be made more material-saving than would be necessary without the additional switch for protection against thermal overload.
  • the additional switch has hitherto been designed as a circuit breaker, so that, if necessary, a short-circuit current to a short circuit in the line section between the switch and coil device can be switched off by the operation of the switch.
  • a short circuit in the area between the switch and current-limiting coil means can not be limited in advance by the coil means in unfavorable configurations of the power network, but must be prevented alone or at least main ⁇ nec by the operation of the switch. Therefore, the series-connected switch is designed as Leis ⁇ processing switch that the full short circuit current at the rated voltage of the power grid reliable Power off ⁇ th may.
  • a disadvantage of such current limiting devices is that in the design of the serial switch as a power ⁇ switch in addition to the higher cost and increased space requirements, inter alia, inter alia, a comparatively high off ⁇ switching time is accepted. At a higher From ⁇ switching time of this switch but the remaining current to flow in the first step of the limited current through said coil means takes longer in the case of short circuit.
  • the coil means must therefore be dimensioned correspondingly robust to endure this limited current at least as long until the residual current through the circuit breaker is reliably switched off.
  • the object of the invention is therefore to provide a current-limiting device which overcomes the disadvantages mentioned.
  • a current limiter device should be provided which can switch from one ⁇ through the coil device already limited residual current as quickly as possible.
  • Another object is to provide a method for limiting a short-circuit current with such a current limiter device.
  • the current limiter device serves to limit a short-circuit current in a superordinate one
  • Power grid It has a current-limiting coil device and a to the coil means electrically connected in series load switch, wherein the switch is designed as a load switch.
  • said short-circuit current is understood to mean a current in connection with all common types of short circuits, ie not just a direct two-pole short circuit between two conductors of a system, but in particular also a single-pole short circuit (ground fault) between a conductor and earth, a three-pole short between three conductors of a system, a two- or three-pole short with earth contact tion, as well as a double ground fault.
  • the terms "short-circuit”, “short-circuit current” or “short-circuit case” should therefore also be understood to mean the corresponding terms of the other types of failure Strombeg ⁇ renzer driving comes as an electric component for use. So it is not about a "superordinate" in relation to the voltage level of the power grid.
  • the current-limiting coil device serves to limit a short-circuit current flowing via this coil device in a first step.
  • the purpose connected in series load switch is used to switch off the thus limited short-circuit current in a second step.
  • a load switch is understood here to be a switch whose breaking capacity is at a small multiple of its predetermined nominal current, but whose breaking capacity is not dimensioned for switching off a typical short-circuit current for a direct two-pole short circuit between two conductors of the superordinate power network.
  • Switch can be switched faster by its design as a load switch as a corresponding executed as a circuit breaker switch.
  • short-circuit current through the current limiting coil unit can be advantageously sheet redu ⁇ .
  • the current-limiting coil unit can be dimensioned even for shorter operating times under the load of the limited short-circuit current.
  • the coil device can be designed with smaller amounts of conductor material than would be possible with an interpretation ⁇ account the current limiter device with a circuit breaker. The coil device can thus cost cheaper, smaller and / or lighter running. Another advantage is that even the load switch itself can be made available cheaper than a corresponding circuit breaker.
  • a erfindungsge ⁇ Permitted current limiter device is used.
  • a short-circuit current flowing through the coil means is restricted to a predetermined limiting current by means of the coil means, and the limiting current flowing through the load switch is interrupted by opening the circuit breaker.
  • the load switches may be electrically connected with the one connection side of the coil device having the two terminal sides of the coil means in the parent network in the current limiting event the substantiallyimpedante Verbin ⁇ dung to a power source of the power system.
  • ⁇ on their words, the orientation of the switch with respect to a power source of the power grid is not arbitrary, but the switch is disposed on a side facing away from the power source of the übergeord ⁇ Neten power supply side of the coil means having the higher impedance to power source.
  • a connection side of the coil means of the current source (or several current sources on the same side of the coil device) to face, and the other terminal side of the Spu ⁇ len driven can one or more of the consumers Facing the power grid.
  • the load switch is then placed on the consumer side of the SPU ⁇ len driven.
  • the power grid is again connected to the power source in the further course of the line to form a closed circuit.
  • the connection of the coil device is higher impedance at least during current limiting than on the current source side, since the least ⁇ one consumer is arranged on this side between Spulenein- direction and current source.
  • the switch is arranged on the consumer side of the coil device in other words.
  • the essential advantage of an arrangement of the switch on the load side of the coil device is that in the case of a short circuit to a line section between switch and coil device, only the coil device and not the switch will be flowed through by the short-circuit current.
  • the short-circuit current flowing through the coil device is thus automatically limited by the coil device to a predetermined limiting current.
  • the switch can optionally be opened without the short-circuit current being switched off here. The switch must therefore not be executed as a circuit breaker for this case.
  • the switch is connected to the higher impedance connected to the at least one power source ⁇ connected connection side with the coil device.
  • this higher impedance connected side should be referred to as consumer side for the sake of simplicity.
  • the switch when there is a short circuit to a line section between the switch and the coil device on the load side, less current flows than on the opposite side of the power source.
  • the risk that one of the Coil means not limited current is so high that it can no longer be switched by the switch is gerin ⁇ ger in an arrangement of the switch on the consumer side.
  • cogeneration plants, photovoltaic installations and / or wind power plants come into consideration as further sources of power.
  • the load switch can advantageously be arranged adjacent to the coil device.
  • the interspace between the load switch and the coil device with the exception of a connecting electrical conductor, can be free of electrical components.
  • Such a directly adjacent arrangement has the advantage that a short circuit to a line section between the switch and coil device is much less likely than if there are additional electrical components in this intermediate space. The shorter the distance between the switch and coil means, the less likely is generally a short to the intervening area.
  • the current-limiting device can advantageously be free of a circuit-breaker connected in series with the coil device.
  • the load switch is then not used in addition to a conventional power switch, but instead of such a circuit breaker used.
  • costs can be saved on the switch itself, since load switches can usually be made more cost-effective than circuit breakers.
  • the current limiter ⁇ purely direction can be free of any circuit breakers accessiblestal- tet.
  • a further circuit breaker in addition to the load switch to arrange a further circuit breaker in series with the coil device.
  • This can be particularly advantageous in cases where a fast ⁇ les shift is desired by the circuit breaker to interrupt the flow of the limiting current through the coil device quickly, which on the other hand a short- can not be ruled out completely, which leads on the side of the circuit breaker to an unlimited flow of current through the load switch.
  • Such a short circuit can be so high that it can not be interrupted by the load switch alone.
  • an additional circuit breaker which is arranged on the same side as the load switch, viewed from the coil device, can ensure that even such a short circuit between the coil device and one of the two switches can be reliably interrupted.
  • the load switch can have a switching capacity which corresponds to at least one current limited by the coil device and is lower than the unlimited short-circuit current.
  • the load switch can be dimensioned such that it can effectively switch off a limiting current flowing through the coil device, but that it could not switch off the unlimited short-circuit current which would flow in the power network, for example, without the action of the coil device.
  • the switching capacity mentioned may generally be, in particular, the turn-off capability of the circuit breaker.
  • the higher-level circuit can generally be characterized by a predetermined rated current.
  • the circuit breaker may then have a switching capacity corresponding to a maximum of five times the rated current of a predetermined übergeord ⁇ Neten grid.
  • the switching ⁇ assets can be at most three times this predetermined rated current.
  • Such a switch can be exemplified not turn off an unlimited short-circuit current of a short circuit between two conductors, but it can sure turn limited by the coil device current with a much shorter response time than a borrowed for German higher to be switched currents sized power ⁇ switch.
  • the load switch can have a maximum switching capacity of 10 kA at a rated voltage of 66 kV or less.
  • Such a dimensioned load switch can advantageously be used in medium-voltage networks for switching off a current already limited by the coil device, without its switching capacity sufficient for switching off an unlimited short-circuit current for a direct short circuit between two conductors.
  • the load switch can be a maximum off time
  • the coil device can be advantageously constructed with significantly less conductor material than at a slower switching time.
  • the current limiting coil means may advantageously we ⁇ iques have a coil with a superconducting conductor material.
  • a coil device is particularly geeig ⁇ net to cause if it exceeds a threshold value for the current flowing in the power supply current a breakdown of the superconducting properties and as a consequence a rapid and reversible increase in resistance and / or the Indukti ⁇ tivity of the coil device.
  • the superconductor can be arranged either as part of the superordinate power network, for example in a coil connected in series with the load switch. In these cases, the ohmic resistance of this series-connected coil can be kept extremely low.
  • the superconductor can also be arranged in a compensation coil inductively coupled to the superordinate power grid.
  • the superconducting conductor material may advantageously comprise a high-temperature superconductor ⁇ .
  • High-temperature superconductors are superconducting materials with a cracking temperature above 25 K and in some classes of materials, such as cuprate superconductors, above 77 K, where the operating temperature can be reached by cooling with other cryogenic materials than liquid helium .
  • the high-temperature superconductor may comprise, for example, magnesium diboride or an oxide-ceramic superconductor, for example a compound of the REBa 2 Cu 30 x (REBCO) type, where RE stands for a rare-earth element or a mixture of such elements.
  • the current-limiting device may comprise a cryostat, both at least part of the current-limiting coil device and at least one isolating path of the circuit breaker being arranged inside the cryostat.
  • the strombe ⁇ bordering coil means comprises a coil with a superconducting conductor material. This coil can then be cooled by the cryostat to an operating temperature below the cracking temperature of the superconductor.
  • An arrangement of the separation path of the circuit breaker in the same cryostat is therefore particularly advantageous because then the probability ⁇ probability of a striking in the area between the coil device and load switch short circuit can be largely reduced. The switch then no longer necessarily be dimensioned so that it could turn off an unlimited short-circuit current.
  • An optional mechanical drive of the circuit breaker can also, but does not necessarily have to be arranged in the cryostat. To take advantage in avoiding unfavorable
  • the current-limiting device can advantageously have at least two current-limiting coil devices, wherein the load switch is arranged between the two coil devices.
  • the two current-limiting coil devices can in particular be electrically connected in series with one another and with the switch. With such a butterfly-like configuration is for each of the two coil means the consumer side, so that Be ⁇ te with the higher limit in the case of impedance to a Power source of the power network, the other coil ⁇ device facing side.
  • the arranged between the at ⁇ the switch coil means with respect to both coil means is disposed on the consumer side.
  • each of the two coils can be constructed with much less conductor material, in particular also with significantly less than half of the conductor material are built up than it is for a current limiter device with only one coil means in series would be needed with a circuit breaker. This is re ⁇ rum at substantially shorter switching time of the load switch, so that a total of conductor material, in particular superconducting conductor material may be saved.
  • the load switch with the exception of the conductive connection is arranged as the only electrical component between the two current-limiting coil devices.
  • each of the two current-limiting coil devices comprises a superconducting conductor material.
  • rial and at least the superconducting parts of the coil means are arranged together with the circuit breaker in a parent cryostat at ⁇ .
  • the current limiter device can have a normal-conducting parallel impedance, which is electrically connected in parallel to the current-limiting coil device and to the load switch.
  • Such a parallel impedance can advantageously serve to keep the electrical losses in the current-limiting coil device low in the case of limitation.
  • the resistance of the coil device may be relatively high after a collapse of the superconducting properties.
  • ⁇ against this parallel path hardly contributes to the current transportation because the parallel impedance is generally much higher than the excluded impedance of the current limiting coil device.
  • a residual current limited by its impedance can then flow via the parallel impedance even after the switch has been opened, without the superconducting coil device still being loaded.
  • the current-limiting coil device may be a resistive current-limiting coil device. It can be characterized in particular by the features described in the introduction in connection with the prior art for this current limiter type.
  • the current-limiting coil device may be an inductively or inductively-resistive current-limiting coil device.
  • FIG. 2 shows a schematic equivalent circuit diagram of a current-limiting device according to a second exemplary embodiment
  • Figure 3 shows a schematic equivalent circuit diagram of a first ordered on ⁇ power network with two exemplary short-circuit points
  • Figure 4 shows a schematic equivalent circuit diagram of a first ordered on ⁇ power grid with a third beispielhaf ⁇ th short-circuit point
  • Figure 5 is a schematic equivalent circuit diagram of a second
  • Parent 6 shows a schematic equivalent circuit diagram of a third
  • FIG. 7 shows a schematic equivalent circuit diagram of the third superordinate power network with an alternative short-circuit point.
  • FIG. 1 shows a schematic equivalent circuit diagram with a current limiter device 3 according to a first exemplary embodiment of the invention.
  • the current-limiting device has a current-limiting coil device 5, which is electrically connected in series with a switch 7.
  • the ⁇ se two components are electrically with an additional Parallel impedance 17 connected in parallel.
  • These three electrical components shown are the essential functional components of the current limiter device 3 according to this first embodiment of the invention, but the parallel impedance 17 is optional.
  • the choke coil may either itself comprise a superconducting conductor material, and / or it may be provided with an additional compensation coil whose conductor material is superconducting.
  • the arrangement of at least the superconducting part in a cryostat is expedient. Therefore, in the example shown, the ge ⁇ entire superconducting current limiting coil means in the cryostat 15 is arranged, which also surrounds the maral ⁇ ended in series switch 7 here.
  • the switch may be optionally arranged outside the cryostat 15, because it has kei ⁇ NEN superconductor.
  • An arrangement in the cryostat 15, as shown here, is advantageous, however, in order to reduce the risk of a short circuit occurring in the region between the coil device and the switch.
  • the switch 7 is designed as a load switch and has a Ausschalteigen ⁇ time below 30 ms and a breaking capacity below 10 kA.
  • the load switch 7 is arranged on the so-called consumer side 9b of the coil device 5 and facing away from the so-called current source side 9a, wherein the consumer side in a higher-level circuit a higher-impedance connection with a current source of the current ⁇ circle has as the power source side.
  • FIG. 2 shows a schematic example of a current-limiting device according to a second exemplary embodiment of the invention.
  • This current limiter device has a similar construction to that of the first exemplary embodiment, but in addition to a first 5a it also has a second current-limiting device.
  • Zende coil means 5b wherein the load switch 7 is connected between these two coil means 5a and 5b electrically in series.
  • These three components 5a, 5b and 7 are in turn arranged together within a cryostat 15, with which superconducting conductor elements of the current limits ⁇ the coil devices can be cooled.
  • the outer sides of the coil devices 5a and 5b are now the current source sides 9a and the inner sides are the consumer sides 9b, since in the limiting case, the two coil devices 9a and 9b act as high resistances, for example, if the superconducting properties by exceeding predetermined current threshold collapse.
  • the consumer side of the two coil means 5a and 5b lie also in-NEN, if this butterfly-like-structured current limiter ⁇ device 3 is arranged in a more complex power supply system having a plurality of current sources and a plurality of consumers, as will be shown below.
  • FIG. 3 shows a schematic single-phase equivalent circuit diagram of a first simplified illustrated parent power supply 1 with a current limiter device 3 according to the present invention, a current source 11 and a load 13.
  • Power source 11 and load 13 can in this case in each case also exemplary of a plurality of current sources relationship ⁇ as consumer stand.
  • the current limiter device 3 in turn comprises a current-limiting coil device 5 and a load switch 7, which are arranged together in a cryostat 15. It thus essentially corresponds to the current limiter device 3 from the example of FIG. 1, but without the optional parallel impedance, which is not shown here for the sake of clarity.
  • Fi gur 1 ⁇ switching the load 7 is arranged on the consumer side 9b of the coil means.
  • a first possible short-circuit position 19a corresponds to a short circuit which connects the two conductors in the vicinity of the current source 11. Such a short circuit leads in the illustrated power grid 1 to a high short-circuit current, which is not limited by the devices shown. The power grid 1 is therefore not ge ⁇ protects against such power source side shorts.
  • a second possible shorting position 19b corresponds to a short circuit between the two conductors on the
  • the power ⁇ network is protected by the intermediate current limiter device.
  • a short circuit of the type 19b of the Ver ⁇ consumers 13 is bypassed, and initially it flows a very higher short-circuit current by the current limiting coil means 5, which is, however, very fast limited to a predetermined limit current, for example by a together ⁇ lapsing of the superconducting properties of the conductor part in the coil device 5.
  • the opening of the load ⁇ switch 7 is triggered in a detection of such a short circuit case, whereby the time of the current flowing through the coil ⁇ device limiting current is kept very small.
  • this time can be kept much smaller than when turning off with a dimensioned for higher breaking current circuit breaker.
  • the current-limiting coil device 5 can be dimensioned smaller, since heating by the limiting current flowing in the coil device 5 is effectively minimized over the short duration. Since the short-circuit current at a short circuit of the type 19b be ⁇ already limited by the coil means 5 before it is turned off by the load switch 7, this switch must not be designed for switching off the full short-circuit current. This consideration applies to a short circuit of the type 19b in general, regardless of whether the load ⁇ switch 7 is located on the power source side 9a or the consumer side 9b of the coil means 5.
  • Figure 4 shows the same schematic equivalent circuit ⁇ image of the first higher-level power supply 1, similarly as in FIG 4.
  • a third exemplary short circuit type is shown in which a connection of two conductor takes place at the short-circuit position 19c so that a short-circuit is triggered to a region between the coil device 5 and the load switch 7 of the current limiter device 3.
  • an annularly closed short-circuit current flows along the schematically shown short-circuit current path I k .
  • This annular short-circuit current is limited by the coil device 5 to a predetermined limiting current, similar to the short circuit 19b of FIG.
  • a subsequent opening of the load switch 7 is then not required because the current I k does not flow through the load switch 7 due to the position of the short circuit. Opening of the load switch 7 is optional in such a case. It is essential that even in the case of a sol ⁇ chen short circuit between the components of the current limiting circuit breaker of zer adopted no current above the predetermined current limit must be off. This is achieved by its arrangement on the consumer side 9b of the coil device 5.
  • Figure 6 shows a schematic equivalent circuit diagram of drit ⁇ th parent power supply 1 with an alternative
  • the current limiter device 3 comprises two current-limiting coil devices 5a and 5b and a load switch 7 connected therebetween, which are arranged together in a cryostat 15. It thus essentially corresponds to the current limiter device 3 from the example of FIG. 2, but again without the optional parallel impedance, which is not shown here for the sake of clarity.
  • the third superordinate power grid 1 is a more complex power grid with at least two power sources IIa and IIb and a plurality of consumers 13. For the entire current limiter device 3 so are a consumer side and a power source side is not so unique to as in the simpler grids of Figures 3 to 5.
  • the facing of the other coil means 5b or 5a page as consumer side 9b and the thereof from ⁇ facing page as Current source page 9a are considered, as at least in the limiting case after an increase in the impedance of the respective coil means 5b or 5a, this is the higher-impedance side.
  • FIG. 6 also schematically shows a first short-circuit current path I a flowing in the short-circuit at the position 19 a , which results for the current fed from the first current source II a .
  • the second short-circuit current path for the current fed in from the second current source IIb is indicated by I b .
  • the current network is not protected against the current flowing on the first short-circuit current path 19a, as in the example of FIG. 3, since the current-limiting device 3 is not located on this path.
  • the current-limiting device 3 unfolds its full effect and limits the short-circuit current initially to the predetermined limiting current due to the effect of the two coil devices 5a and 5b, the fully limited current subsequently being completely provided by the load switch 7 can be interrupted.
  • FIG. 7 shows the same power network 1 as in FIG. 6, but with a short circuit at an alternative short-circuit position 19c, that is to say again to a line region which is arranged between a coil device 5a and the load switch.
  • a short-circuit results in several sub-streams, one of which fed by the first current source IIa short circuit current path Ia and the current supplied by the second current source IIb path I b is referred to again.
  • a limitation by the respective in Current path lying coil means 5a or 5b to the predetermined limiting current instead.
  • this limiting current in a subsequent
  • Step by the load switch 7 are effectively interrupted because the load switch 7 is indeed designed for interrupting the already limited current.
  • Step by the load switch 7 are completely interrupted, without this must necessarily be designed for the interruption of the full, not yet limited by coil devices short-circuit current. If a short circuit at the positions 19c can not be closed off with sufficient certainty, therefore, is an arrangement of the load switch 7 on one 9a of the power source side derand ⁇ th consumer side 9b of the respective coil means 5, 5a, 5b suitably. It may also be useful for the example of FIG. 7 to insert two further load switches, not shown here, on both sides 9a between the actual current limiter device 3 and the current sources IIa and IIb, in order to close the short circuit at the point 19c or a corresponding point next to the second coil device 5b to dominate. In this case, even in the butterfly arrangement according to FIG. 7, the short-circuit current for all short-circuit types can be quickly interrupted for the respective coil devices 5a and 5b.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un dispositif limiteur de courant permettant de limiter un courant de court-circuit dans un réseau électrique supérieur. Le dispositif limiteur de courant comprend un dispositif bobine à limitation de courant et un interrupteur monté électriquement en série avec le dispositif bobine, le commutateur étant réalisé sous la forme d'un interrupteur. L'invention concerne également un procédé de limitation d'un courant de court-circuit dans un réseau électrique mettant en oeuvre un tel dispositif limiteur de courant, procédé selon lequel un courant de court-circuit circulant dans le dispositif bobine est limité à un courant de limitation prédéfini, au moyen du dispositif bobine, et le courant de limitation circulant dans l'interrupteur est interrompu par ouverture de l'interrupteur.
EP16734581.8A 2015-07-17 2016-06-16 Dispositif limiteur de courant à bobine et commutateur Withdrawn EP3304670A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015213494.6A DE102015213494A1 (de) 2015-07-17 2015-07-17 Strombegrenzereinrichtung mit Spule und Schalter
PCT/EP2016/063900 WO2017012799A1 (fr) 2015-07-17 2016-06-16 Dispositif limiteur de courant à bobine et commutateur

Publications (1)

Publication Number Publication Date
EP3304670A1 true EP3304670A1 (fr) 2018-04-11

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Application Number Title Priority Date Filing Date
EP16734581.8A Withdrawn EP3304670A1 (fr) 2015-07-17 2016-06-16 Dispositif limiteur de courant à bobine et commutateur

Country Status (6)

Country Link
US (1) US20180205223A1 (fr)
EP (1) EP3304670A1 (fr)
KR (1) KR102162449B1 (fr)
CN (1) CN107851992B (fr)
DE (1) DE102015213494A1 (fr)
WO (1) WO2017012799A1 (fr)

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DE102018215881B3 (de) * 2018-09-19 2020-02-06 Siemens Aktiengesellschaft Vorrichtung und Verfahren zum Koppeln zweier Gleichstromnetze

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CN107851992B (zh) 2020-05-01
DE102015213494A1 (de) 2017-01-19
WO2017012799A1 (fr) 2017-01-26
US20180205223A1 (en) 2018-07-19
CN107851992A (zh) 2018-03-27
KR20180030870A (ko) 2018-03-26

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