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WO2019158180A1 - Dispositif destiné à limiter le courant électrique - Google Patents

Dispositif destiné à limiter le courant électrique Download PDF

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Publication number
WO2019158180A1
WO2019158180A1 PCT/EP2018/053508 EP2018053508W WO2019158180A1 WO 2019158180 A1 WO2019158180 A1 WO 2019158180A1 EP 2018053508 W EP2018053508 W EP 2018053508W WO 2019158180 A1 WO2019158180 A1 WO 2019158180A1
Authority
WO
WIPO (PCT)
Prior art keywords
impedance
electrical
switching device
terminal
current
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.)
Ceased
Application number
PCT/EP2018/053508
Other languages
German (de)
English (en)
Inventor
Patrik Ernst
Peter Hamberger
Andreas Haselbauer
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to PCT/EP2018/053508 priority Critical patent/WO2019158180A1/fr
Publication of WO2019158180A1 publication Critical patent/WO2019158180A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • H02H9/021—Current limitation using saturable reactors
    • 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 invention relates to a device for limiting the current flowing in a high voltage line electrical current.
  • the invention is based on the object, an apparatus and a method for limiting a in a
  • High-voltage line to indicate flowing current, which in normal operation by means of the high-voltage line
  • Secondary winding are electrically connected to each other by means of an impedance unit, wherein the impedance unit has a first electrical impedance in a first state and in a second state has a second electrical impedance which is greater than the first electrical impedance. It is particularly advantageous that only a small voltage occurs in the first state of the impedance unit above the primary winding, whereby the current flowing through the high voltage line current is only slightly affected (limited) is. In the second state of the impedance unit, a larger voltage appears across the primary winding, whereby the current flowing through the high voltage line is more limited than in the first state of the impedance unit. This can advantageously during normal operation
  • the impedance unit is brought from the first state to the second state.
  • the impedance unit is in particular an electrical circuit.
  • the impedance unit has at least one electrical component. It is an independent component such as a
  • Switching device a coil or a resistor component.
  • the device may be configured such that the amount of the second electrical impedance is at least 5 times
  • Impedance unit comparatively limited the current flowing in the high voltage line electric current.
  • the device may also be designed so that the impedance unit has a first switching device, by means of which the (between the first terminal and the second terminal of the secondary winding effective) impedance of the impedance unit is increased.
  • the impedance unit can be brought from the first state to the second state.
  • This switching device may be, for example, a mechanical or electronic switch.
  • the device can be designed such that the first switching device electrically connects the first terminal and the second terminal of the secondary winding in a first switching position, and
  • the impedance of the first switching device of the first switching device is advantageously at the first switching position
  • the device can also be designed so that the first switching device in a first switching position electrically connects a connection of a first impedance-applied (electrical) component of the impedance unit to the (first connection or the second connection) of the secondary winding and
  • the device may be configured such that the
  • Impedance unit has a first electrical impedance branch and a second electrical impedance branch, wherein the first electrical impedance branch and the second electrical impedance branch are connected in parallel.
  • first electrical impedance branch and the second electrical impedance branch are connected in parallel.
  • electrical impedance branches have the advantage that with them four different electrical impedances of the electrical impedance unit can be realized: the impedance of the first impedance branch, the impedance of the second
  • Impedanzzweigs the impedance of the parallel connection of the first and second impedance branch and the impedance with separated first and second impedance branch.
  • the device may be configured such that the first electrical impedance branch or the second electrical
  • the first switching device electrically switchable (in particular electrically separable).
  • the first impedance branch or the second impedance branch can be effectively switched in the secondary circuit of the transformer (or switched ineffective).
  • the device may also be configured such that the first switching device in the first impedance branch
  • the impedance unit comprises a second switching device which is arranged in the second impedance branch.
  • the first impedance branch and the second impedance branch are switchable (or
  • Transformers can flow.
  • the first impedance branch and the second impedance branch can be operated either independently by means of the switching means independently of each other
  • Secondary circuit of the transformer to be switched or separated from the secondary circuit of the transformer.
  • the device can also be configured such that the first impedance branch has the first impedance-subject component and
  • the second impedance branch has a second impedance-applied (electrical) component.
  • the device may be configured such that the first impedance-subject component and / or the second
  • impedance-affected device is a coil or a resistor.
  • impedance-affected components are
  • the first impedance-imparted component and / or the second impedance-subject component may also be a combination of a coil and a resistor; So you can both resistance properties and coil properties
  • the device can also be designed such that the first impedance-subject component and / or the second impedance-subject component is a superconducting electrical component, in particular a superconducting resistive or inductive current limiter.
  • a superconducting electrical component in particular in a superconducting electrical component
  • the impedance of the device is additionally variable (depending on the temperature).
  • the first impedance-affected component and / or the second impedance-affected component may also be a combination of a resistive and an inductive current limiter:
  • the device may be configured such that the first switching device and / or the second switching device is a power switch, in particular a power electronic circuit breaker.
  • a power switch in particular a power electronic circuit breaker.
  • the device may be configured such that the first terminal and the second terminal of the secondary winding are electrically connected by means of the impedance unit to form a secondary circuit.
  • the secondary circuit allows a secondary current to flow, in particular when the impedance unit is in its first state. The flow of the secondary flow in the
  • Secondary circuit allows the construction of a magnetic field in the secondary winding, this magnetic field
  • Secondary winding wherein the primary winding is connected in series in the high voltage line and a first terminal and a second terminal of the secondary winding are electrically connected by means of an impedance unit, wherein the impedance unit in a first state has a first electrical impedance and in a second state, a second electrical impedance which is greater than the first electrical impedance, wherein in the method
  • the impedance unit has the first state
  • the impedance unit is brought into the second state.
  • the first state only a low voltage occurs across the primary winding, whereby the current flowing through the primary winding is limited only insignificantly.
  • the second state the voltage across the primary winding is increased, thereby limiting the current flowing through the primary overcurrent.
  • This method can proceed such that the amount of the second electrical impedance is at least 5 times, in particular at least 10 times, as large as the amount of the first electrical impedance.
  • the method may also be such that the impedance unit has a first switching device, by means of which the
  • impedance between the first terminal and the second terminal of the secondary winding effective impedance of the impedance unit is increased.
  • the process can proceed in such a way that by means of the first
  • Switching device in the first switching position of the first terminal and the second terminal of the secondary winding are electrically connected and by means of the first
  • Switching device in the second switching position of the first terminal and the second terminal of the secondary winding are electrically isolated from each other.
  • the process can proceed in such a way that by means of the first
  • connection of an impedance (electrical) component of the impedance unit with (the first terminal or the second terminal) of the secondary winding is electrically connected and by means of the first switching device in the second switching position of the connection of the impedance-affected component of (the respective terminal) of the
  • the method may be such that the first terminal and the second terminal of the secondary winding by means of
  • Impedance unit at the first state are electrically connected to form a secondary circuit, which allows the flow of a secondary current.
  • the method may be such that the impedance unit has a first electrical impedance branch and a second electrical impedance branch, wherein the first
  • Impedance branch are connected in parallel and the first
  • Impedanzzweig have different sized electrical impedances and wherein for changing the impedance of the
  • Switching device is electrically connected in the secondary circuit or separated from the secondary circuit.
  • Figure 1 shows a first embodiment of a device for limiting an electric current flowing in a high voltage line
  • FIG. 2 shows an equivalent circuit diagram for the device according to FIG. 1 in its first state
  • FIG. 3 shows the equivalent circuit diagram for the device according to FIG.
  • FIG. 4 shows a further embodiment of a device for limiting the electrical current flowing in a high-voltage line
  • FIG. 5 shows an equivalent circuit diagram for the device according to FIG. 5
  • FIG. 4 in its first state
  • FIG. 6 shows the equivalent circuit diagram for the device according to FIG. 6
  • FIG. 4 in its second state
  • Figure 7 shows an embodiment of an apparatus for
  • FIG. 9 shows a further exemplary embodiment of a device for limiting the electrical current with two impedances
  • Figure 1 shows an embodiment of an apparatus for
  • Figure 1 shows an exemplary sequence of a method for
  • FIG. 1 shows an exemplary embodiment of a device 1 for limiting one in a high-voltage line 4
  • the high voltage line 4 is part of an energy transmission network for the transmission of electrical power to high voltage level.
  • High voltage is understood in the context of this description, a voltage greater than or equal to 30 kV.
  • the transformer 6 has a primary winding 8 with a first terminal 10 (first primary winding terminal 10) and a second terminal 12 (second primary winding terminal 12). Furthermore, the transformer has a
  • Secondary winding 14 with a first terminal 16 (first secondary winding terminal 16) and a second terminal 18 (second secondary winding terminal 18) on.
  • Primary winding 8 is connected in series with high voltage line 4; i.e. the primary winding 8 is serially in the
  • High voltage line 4 connected.
  • the primary winding 8 interrupts the high voltage line 4, wherein one end of the high voltage line 4 is connected to the first terminal 10 of the primary winding and the other end of the
  • the transformer 6 preferably has a core for guiding the magnetic field, but this core is not shown in the figures.
  • the first terminal 16 of the secondary winding 14 is electrically connected to the second terminal 18 of the secondary winding 14 by means of an impedance unit 24.
  • the impedance unit is by means of the secondary winding 14 from the primary side or
  • Impedance unit 24 is at a lower voltage level than the high voltage line 4.
  • the device 1 Current limiting device 1 thus has the transformer 6 and the impedance unit 24.
  • the impedance unit 24 has an impedance-related electrical component 26 (in this case a coil 26) and a first switching device 28.
  • the secondary winding 14 and the impedance unit 24 form a secondary circuit 34 through which a secondary current Is of the transformer 6 can flow.
  • the secondary current Is of the transformer can, of course, only flow when the first switching device 28 is closed.
  • the coil 26 may in particular be designed so that it has only a small impedance at normal current.
  • the coil 26 may preferably be a non-linear coil, which at
  • Normal current has a small impedance (ideally zero) and has a larger impedance at overcurrent.
  • impedance-affected device 26 for example, a so-called smart coil (variable impedance coil) can be used, see for example the
  • the first switching device 28 thus connects in a first switching position, a first terminal 30 of the first
  • the first switching device 28 disconnects the first terminal 30 of the impedance-subject device 26 from the first terminal 16 of the secondary winding.
  • the second switching position is shown.
  • a second terminal 32 of the first impedance-affected component 26 is
  • FIG. 1 could also be configured such that the first switching device 28 in the first switching position the first terminal 30 of the device 26 with the second
  • Terminal 18 of the secondary winding connects and in the second switching position, this first terminal 30 of the Device 26 from the second terminal 18 of the
  • the first switching device 28 is illustrated by means of a simple switch symbol, the first
  • Switching device 28 have a plurality of individual switching devices, which are connected in a series circuit and / or in a parallel circuit. The first
  • Switching device 28 may thus, for example, a
  • Normal operation flows through the high voltage line 4 a normal current.
  • a normal current is a current whose magnitude falls below a predetermined threshold (current threshold). In normal operation is the first
  • Switching device 28 of the impedance unit 24 closed; In normal operation, the first state of the impedance unit 24 is present.
  • the normal current flows as a primary current through the
  • the secondary current Is flows in the secondary circuit 34 through the closed first switching device 28 and the coil 26 and generates in the secondary winding 14, a magnetic field, which
  • an overcurrent When the current I flowing through the high voltage line 4 exceeds the threshold, there is an overcurrent.
  • Such an overcurrent may be present, for example, when a short circuit has occurred in the energy transmission network.
  • the overcurrent is a short-circuit current.
  • the first switching device 28 is opened.
  • the first switching device 28 is constructed so as to be capable of flowing in the secondary circuit 34
  • the impedance unit 24 has a very large electrical impedance, namely in
  • Switching device 28 is thus between the first
  • the secondary current Is of the secondary circuit 34 stops flowing, the magnetic field of the secondary winding 14 breaks down. As a result, the magnetic field of the primary winding 8 is no longer compensated, and now occurs at the primary winding 8, a larger primary voltage than when the first switching means 28. By this increased primary voltage of the current flowing through the high voltage line 4 current I is limited.
  • the first switching device 28 can be closed again.
  • the first state of the impedance unit 24 is again produced, in which the device 1 only insignificantly affects the current I flowing through the high-voltage line 4
  • Secondary circuit 34 of the impedance unit 24 also a fast variable impedance are used, which has a low impedance in the first state and in the second state has a higher impedance.
  • Such variable impedances can be realized for example by means of a superconducting device or by means of a so-called smart coil.
  • FIG. 2 shows an example of an equivalent circuit diagram 201 for the transformer 6 with connected impedance unit 24 according to FIG. 1 in the first state of the impedance unit (first switching device 28 closed).
  • Equivalent circuit diagram of the transformer 6 has a first
  • Main impedance Zh is much larger than the second stray impedance Zs2 and also much larger than the first stray impedance Zsl.
  • the two stray impedances Zsl and Zs2 have only small
  • Primary winding terminal 12 only a low voltage. This low primary voltage will - as above
  • the Coil 26 can be chosen so that this coil 26 has only a low impedance.
  • the equivalent circuit 201 of the transformer 6 and the impedance unit 24 are in their second state (when the first switching device 28 is open).
  • the current I can no longer flow as a secondary current Is via the impedance-affected electrical component 26 of the impedance unit 24 due to the opened first switching device 28, but flows completely as the main impedance current Ih over the main impedance Zh. Because the
  • Main impedance Zh is much larger than the first stray impedance Zsl and the second stray impedance Zs2, occurs between the first terminal 10 and the second terminal 12 of the
  • Device 401 differs from device 1 according to FIG. 1 only in that impedance unit 24 has a resistor 405 instead of coil 26 as an impedance-applied electrical component.
  • the resistor 405 may be an ohmic resistor 405, in the
  • the resistor 405 is a superconducting resistive current limiter 405.
  • a superconducting inductive current limiter may also be used as the impedance-affected electrical component.
  • This superconductive resistive current limiter 405 has a resistance of different magnitude as a function of the temperature (and consequently also a difference in impedance).
  • the superconducting resistive Current limiter 405 is cooled and is superconducting during normal operation. Therefore, the superconducting resistive
  • Current limiter 405 has a low ohmic resistance and a low electrical impedance during normal operation. As in the embodiment of FIG. 1, in the first state of the impedance unit 24, the first switching device 28 is closed and the secondary current Is flows through the secondary winding 14, the first switching device 28 and the superconducting resistive current limiter 405
  • superconducting resistive current limiter 405 is heated by the increasing secondary current Is so strong that it loses its superconducting property and the electrical resistance increases sharply.
  • the secondary current Is smaller, the magnetic field of the secondary winding weaker, and consequently the voltage occurring across the primary winding 8 increases.
  • the first switching device 28 can then be opened, whereby the secondary current drops to zero and the voltage across the primary winding 8 increases again.
  • the current I flowing through the high voltage line 4 is thereby effectively limited.
  • FIG. 5 shows an equivalent circuit diagram 501 of the transformer 6 and the impedance unit 24 according to FIG. 4 in the first state of the impedance unit 24 (closed first
  • FIG. 6 shows this equivalent circuit diagram 501 in the second state of the impedance unit 24 (opened first switching device 28).
  • the explanations on the equivalent circuit diagram according to FIGS. 2 and 3 also apply mutatis mutandis to FIGS. 5 and 6.
  • Figure 5 the normal operation is shown, in which the first
  • Switching device 28 is closed and the power almost completely through the impedance unit 24 (that is, through the superconducting resistive current limiter 405 and the first switching device 28) flows.
  • the current I on the primary side becomes larger and thus also the current Is on the secondary side of the transformer.
  • the first switching device 28 can now be opened. As soon as the first switching device 28 is opened, the impedance of the impedance unit 24 increases further. Thus, the effective on the primary side impedance increases, the overcurrent (short-circuit current) is now limited only by the first stray impedance Zsl and the main impedance Zh (which is present in the saturated state). Due to the comparatively large main impedance Zh occurs at the primary winding of the transformer 6, a large
  • Transformer at rated operation carries little magnetic flux and also the core is advantageously designed to be small, the core in a preferred variant with
  • the transformer can also act as a
  • the superconducting component for example, a superconducting winding or the
  • Cool current limiter 405 on the other hand so that increases the (on the primary side) effective impedance of the transformer 6 on.
  • Circuit breaker Preferably, a circuit breaker with a proper time less than 3 milliseconds can be used. If in the secondary circuit additional non-linear
  • Own times are sufficient, for example 15 milliseconds.
  • the first switching device 28 can be closed again.
  • the superconductive resistive current limiter 405 is then cooled and again has a low impedance (thus acts essentially as a short circuit on the secondary side of the transformer). The device for limiting the current now works again in normal operation.
  • the Device 701 for limiting the current flowing in the high voltage line 4 electric current I shown. It is in the Secondary circuit 34, only the secondary winding 14 of the transformer 6 and the first switching device 28 is present. The first switching device 28 is used for
  • Switching device 28 thus connects in the first
  • Terminal 18 of the secondary winding together.
  • the first switching device 28 disconnects the first connection 16 from the second connection 18
  • the impedance unit 24 is free of an impedance-affected component. Therefore, in the secondary circuit 34 of the transformer, substantially only the impedance of the secondary winding 14 and the impedance of the electrical connection lines between the secondary winding 14 and the first switching device 28 are effective. The connection lines always have an (albeit very small) impedance. The secondary circuit 34 thus has a very small electrical impedance (when the first switching device 28 is closed, i.e. at the first state of the impedance unit).
  • the first switching device 28 is opened.
  • the method for limiting the electric current is the same as in the device according to FIG. 1.
  • the first switching device 28 optionally, for example, a commercially available medium-voltage short circuit current limiter.
  • a so-called Is limiter is limiter
  • a CliP current limiting protector
  • Circuit breaker can be used. such as
  • Switching devices can also work with the others
  • Embodiments are used. For some However, such switching devices after a single use, however, fuse elements or switching elements must be replaced, since this type of switching device is intended only for a single use. However, this disadvantage could be due to redundant (for example, parallel
  • the impedance unit 24 has a first electrical impedance branch 804 and a second electrical impedance branch 808.
  • the first electrical impedance branch 804 has the first switching device 28 and the first impedance-affected component 26 (here by way of example the coil 26).
  • the second electrical impedance branch 808 has a second switching device 812 and a second impedance-affected component 816 (here by way of example a second coil 816). The two can
  • impedance-affected components 26, 816 have different electrical impedances; in a special case, however, they can also have equal electrical impedances.
  • the first electrical impedance branch 804 is parallel
  • the first electrical impedance branch 804 can be effectively in the
  • Switching device 812 is the second electrical
  • Impedanzzweig 808 switchable (in particular electrically
  • impedance-affected device 816 This corresponds to the first state of the impedance unit 24. If the first
  • Switching device 28 is opened, then is in
  • Switching device 812 is opened, then is in
  • the current I flowing in the high voltage line can be limited stepwise (depending on the size of the
  • the first impedance-affected component 26 has a smaller inductance (and therefore also a smaller impedance) than the second impedance-affected component 816.
  • the current Is flows through the first impedance-affected component 26 (with the smaller impedance) Inductance), therefore, the voltage drop across the primary winding 8 is comparatively low.
  • Impedance of the Kurzröstrombeskyrs 801 is therefore relatively small; the current I flowing through the high voltage line 4 is hardly hindered / limited.
  • Threshold increases becomes the first switching device 28 open; the second switching device 812 remains closed.
  • the current commutates from the first electrical impedance branch 804 into the second electrical impedance branch 808.
  • the impedance of the impedance unit 24 is thus increased, and the secondary current Is in the secondary circuit 34 is reduced. This will increase the voltage over the
  • the design of the impedance-affected components 26, 816 may be different.
  • the first impedance-affected components 26, 816 may be different.
  • device 816 may be each referred to as a coil, an ohmic resistor, or a superconducting device (particularly as a superconductive resistive device)
  • Switching device 28 and / or the second switching device 812 may each preferably as a power switch (in particular as a power electronic
  • Circuit breaker be configured. Such a
  • IGBT insulated gate bipolar transistor
  • GTO thyristor gate turn-off thyristor
  • Variant A The first impedance-affected device 26 and the second impedance-affected device 816 are as two
  • Air throttles designed.
  • the first switching device 28 is opened in front of the first air throttle 26 and an arc is created in the first one
  • Variant B The first impedance-affected component 26 is designed as a superconducting component and is connected in normal operation in the secondary circuit 34 (first
  • impedance-affected device 26 has a comparatively small inductance and impedance in the superconducting state; the second impedance-affected device 816 is as a
  • first switching device 28 and the second switching device 812 a changeover switch can also be used.
  • first choke coil 26 and / or the second choke coil 816 may also be implemented as a choke coil of variable inductance (eg, as a so-called smart coil).
  • Impedance unit 24 at least five times, in particular
  • the difference between the first electrical impedance and the second electrical impedance but can also
  • the first electrical impedance is formed only by (very small) line impedances
  • the second electrical impedance is essentially formed by a separate line
  • impedance-affected component is formed.
  • impedance-affected device 26 and / or the second
  • impedance-affected device 816 may be generally configured in each case as a coil, a resistor or as a superconducting device.
  • Switching device 812 is present. However, the second electrical impedance branch 808 is free of one
  • Impedance unit 24 in which this impedance unit 24 has a very low electrical impedance (almost zero)
  • the first switching device 28 and the second switching device 812 are closed.
  • Such a circuit breaker is advantageous due to the high arc voltage that occurs when switching.
  • the second switching device 812 is opened, and there is an arc in the switching path of the second switching device 812.
  • Arc voltage in the second switching device 812 commutes part of the secondary current to the first
  • a sufficiently large current commutates on the first electrical impedance branch 804, so that subsequently the arc in the second switching device 812 goes out and the switching path of the second switching device 812 goes out
  • Short-circuit current I on the primary side of the transformer 6 sufficiently limited.
  • a variant of the device 901 may be as follows
  • the first choke coil 26 is
  • Secondary circuit 34 connected (first switching device 28 closed). When an overcurrent / short circuit occurs, the first switching device 28 is opened. Until the Zero crossing of the short-circuit current, the secondary current Is continues to flow through the superconducting inductor 26. The high short-circuit current leads to heating of the superconducting inductor and causes the superconductivity collapse.
  • the first switching device 28 interrupts the current through the superconducting inductor 26, thus the current flows
  • the second electrical impedance branch 808 is not present in this variant. In this way, the device according to this variant functions similarly to the device 401 according to FIG.
  • the second electrical impedance branch 808 has only the second one
  • the second electrical impedance branch 808 is switchless; the second electrical impedance branch 808 thus does not have the second switching device 812.
  • Component 26 is designed superconducting and is in
  • Embodiment a superconducting reactor.
  • the first switching device 28 In normal operation, the first switching device 28
  • the secondary current Is largely flows through the first impedance-subject device 26.
  • the high short-circuit current heats the superconducting Choke coil 26, whereupon these are their superconducting
  • Air throttle 816 greater inductance is configured.
  • the short-circuit current is limited even more.
  • the impedance unit can also be realized quite differently, for example, the
  • Impedance unit designed as a modular Multilevelstromrichter.
  • FIG. 11 once again diagrammatically shows an exemplary embodiment of the method for limiting the current flowing in the high-voltage line.
  • the starting point is shown in block 1110: in the case of an electrical current I flowing through the high-voltage line 4, which falls below a predetermined threshold value
  • the impedance unit 24 has the first
  • the impedance unit monitors whether it exceeds the threshold. If the current I exceeds the threshold, then in a step 1130 the impedance unit is brought into the second state. This will be over the
  • Methods of limiting the electrical current flowing through the high voltage line include a series of
  • the impedance unit is connected to the secondary winding of the
  • the components of the impedance unit are at a lower voltage level compared to the high voltage level of the primary winding of the transformer. This allows the impedance unit
  • the variant with a superconducting impedance-related component also has the advantage that even without a quick detection of the overcurrent (and thus without a
  • High voltage line is limited to flowing electrical current.
  • a device and a method has been described with which the current flowing in a high voltage line electrical current can be reliably limited.

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

Abstract

L'invention concerne un dispositif destiné à limiter le courant électrique (I) circulant dans une ligne à haute tension (4), ce dispositif comprenant un transformateur (6) qui présente un enroulement primaire (8) et un enroulement secondaire (14), l'enroulement primaire (8) pouvant être connecté en série avec la ligne à haute tension (4). Une première borne (16) et une seconde borne (18) de l'enroulement secondaire (14) sont reliées électriquement au moyen d'une unité d'impédance (24).
PCT/EP2018/053508 2018-02-13 2018-02-13 Dispositif destiné à limiter le courant électrique Ceased WO2019158180A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/053508 WO2019158180A1 (fr) 2018-02-13 2018-02-13 Dispositif destiné à limiter le courant électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/053508 WO2019158180A1 (fr) 2018-02-13 2018-02-13 Dispositif destiné à limiter le courant électrique

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WO2019158180A1 true WO2019158180A1 (fr) 2019-08-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117394291A (zh) * 2023-09-04 2024-01-12 西南交通大学 双面超导薄膜限流组件、混合型超导限流器及限流方法

Citations (8)

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WO2004036715A1 (fr) * 2002-10-15 2004-04-29 Dongah Tech Inc. Dispositif d'economie d'energie electrique equipe d'une bobine a noyau saturable
US6920027B1 (en) * 2002-11-12 2005-07-19 Felix Torres Fast, variable, and reliable power system controller design
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CN117394291B (zh) * 2023-09-04 2024-07-12 西南交通大学 双面超导薄膜限流组件、混合型超导限流器及限流方法

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