CN111463765A - Superconducting direct current limiter and superconducting direct current limiting device - Google Patents

Superconducting direct current limiter and superconducting direct current limiting device Download PDF

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Publication number
CN111463765A
CN111463765A CN202010119507.4A CN202010119507A CN111463765A CN 111463765 A CN111463765 A CN 111463765A CN 202010119507 A CN202010119507 A CN 202010119507A CN 111463765 A CN111463765 A CN 111463765A
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Prior art keywords
superconducting
direct current
superconducting direct
current
current limiter
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Pending
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CN202010119507.4A
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Chinese (zh)
Inventor
盛超
肖磊石
骆潘钿
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Electric Power Research Institute of Guangdong Power Grid Co Ltd
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Electric Power Research Institute of Guangdong Power Grid Co Ltd
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Priority to CN202010119507.4A priority Critical patent/CN111463765A/en
Publication of CN111463765A publication Critical patent/CN111463765A/en
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    • 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
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • 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

Abstract

The application discloses a superconducting direct current limiter, which comprises a plurality of non-inductive superconducting coils and inductive coils; one said non-inductive superconducting coil is connected in series with one said inductance coil to form a current-limiting branch; each current limiting branch is connected in parallel; and each inductance coil is wound on a magnetic conductive medium in the same direction. The superconducting direct current limiter disclosed by the application solves the technical problems that in the existing superconducting direct current limiter, the short-circuit currents in all parallel branches are different, the whole quenching synchronism of the superconducting direct current limiter is influenced, the response speed to a short-circuit is reduced, and a superconducting coil can be damaged due to serious difference. The application also discloses a superconducting direct current limiting device.

Description

Superconducting direct current limiter and superconducting direct current limiting device
Technical Field
The application relates to the technical field of power equipment, in particular to a superconducting direct current limiter and a superconducting direct current limiting device.
Background
When a direct current power grid fails, fault current causes the direct current circuit breaker to act, and the fault can be removed quickly and effectively. However, the breaking capacity of the dc circuit breaker needs to be adapted to the fault current, and the dc circuit breaker having a large breaking capacity is expensive, and therefore, it is necessary to limit the magnitude of the fault current.
The resistive superconductive DC current limiter can be used for generating larger resistance to limit the fault current level by means of the quench of the superconductive strip material in the short circuit process. A plurality of superconducting coils connected in parallel are arranged in the resistive superconducting direct current limiter, but the impedance of each parallel branch is different, so when the short-circuit current rises (taking a short-circuit fault as an example for explanation), the short-circuit current in the parallel branches is also different, the quench levels of the parallel branches are different, the integral quench synchronization of the superconducting direct current limiter is influenced, and the response speed to a short-circuit is reduced; and, if the difference is severe, the superconducting coil may be damaged.
Disclosure of Invention
The application provides a superconducting direct current limiter, which aims to solve the technical problems that in the conventional superconducting direct current limiter, the short-circuit currents in all parallel branches are different, the whole quenching synchronism of the superconducting direct current limiter is influenced, the response speed to a short-circuit is reduced, and a superconducting coil can be damaged due to serious difference. The application also provides a superconducting direct current limiting device.
In view of the above, a first aspect of the present application provides a superconducting dc current limiter, including a plurality of non-inductive superconducting coils and an inductive coil;
one said non-inductive superconducting coil is connected in series with one said inductance coil to form a current-limiting branch;
each current limiting branch is connected in parallel;
and each inductance coil is wound on a magnetic conductive medium in the same direction.
Preferably, the magnetic conductive medium has a closed structure.
Preferably, the relative magnetic permeability of the magnetic conductive medium is between 7000 and 10000.
Preferably, the non-inductive superconducting coil specifically comprises a superconducting tape and two insulating support materials;
the superconducting strip is spirally and inwardly wound from the first end, turns around in an S-shaped bending mode after reaching the center, is spirally and outwardly wound in a reverse direction, and is led out of the second end;
the two insulating support materials are arranged in a clamping channel formed by spirally winding the superconducting tape.
Preferably, the inductance of the inductance coil is between 0.4mH and 5mH, and the resistance of the inductance coil is between 2.2m omega and 8.8m omega.
A second aspect of the present application provides a superconducting dc current limiting device, comprising a plurality of superconducting dc current limiters as any one of the above-mentioned superconducting dc current limiters according to the first aspect;
the superconducting direct current limiters are connected in series and/or in parallel.
Preferably, an even number of the superconducting direct current limiters are specifically included;
half of the superconducting direct current limiters are connected in series to form a first branch circuit; the other half of the superconducting direct current limiter is connected in series to form a second branch circuit;
the first branch is connected in parallel with the second branch.
Preferably, the superconducting direct current limiter specifically comprises 8 superconducting direct current limiters.
Preferably, the superconducting direct current limiter has 3 current limiting branches.
Preferably, the superconducting direct current limiting device is arranged between an outlet of a converter of a direct current power grid and a direct current breaker.
According to the technical scheme, the method has the following advantages:
the application provides a superconducting direct current limiter, which forms current limiting branches by a non-inductive superconducting coil and an inductive coil, wherein the inductive coil of each current limiting branch is wound on a magnetic conductive medium in the same direction to form magnetic coupling. Therefore, when a short-circuit fault occurs in a circuit, the inductance coil of each current-limiting branch circuit has the same inductance, the impedance of each current-limiting branch circuit is matched, the rise rate of short-circuit current can be inhibited at the initial stage of the fault, the current on each current-limiting branch circuit keeps small difference, current equalization is realized, the synchronism of quench of the non-inductive superconducting coil in each current-limiting branch circuit is improved, and the response speed of the superconducting direct current limiter is accelerated. Of course, the realization of the current sharing also avoids the risk of damage to the non-inductive superconducting coil caused by overlarge difference.
In addition, because the inductance of the existing resistive superconducting direct current limiter is very low, when a short-circuit fault occurs in the flexible power grid, the rising rate of the short-circuit current cannot be inhibited, which causes the problems of increased mechanical stress, decreased insulation level, overvoltage, heat generation and the like of the system. In the application, the addition of the inductance coil can inhibit the short-circuit current rise rate, and the problem is effectively solved.
In addition, the whole impedance of the superconducting direct current limiter is improved, the fault current level can be effectively reduced in the later stage of the fault, and the fault can be removed in the effective time by matching with the direct current breaker, so that the safety of a power grid is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a current limiting branch in a superconducting dc current limiter according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an implementation of a superconducting dc current limiter provided in the present application;
FIG. 3 is a schematic structural diagram of an inductively superconducting coil according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of winding of an inductor according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an implementation of a superconducting dc current limiting device provided in the present application;
fig. 6 is a wiring diagram of a test model of the superconducting dc current limiting device provided in the embodiment of the present application in a four-terminal flexible dc power transmission system;
FIG. 7 is an equivalent circuit diagram of the superconducting DC current limiter provided in the present application under normal and fault conditions;
fig. 8 is a graph showing a variation of a short-circuit current of each current-limiting branch in a conventional superconducting dc current limiter in a simulation test;
fig. 9 is a graph illustrating a variation of a short-circuit current in each current-limiting branch of the superconducting dc current limiter provided by the present application in a simulation test.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.
The superconducting direct current limiter is an ideal current limiting device, and the impedance of the superconducting direct current limiter is basically zero when the flexible direct current transmission network normally operates; when the flexible direct current transmission network has a short-circuit fault, the superconducting direct current limiter can rapidly respond to a larger impedance to limit the level of the short-circuit current, and can rapidly and effectively cut off the short-circuit current of the direct current power network by matching with the rapid action of a direct current breaker in the power network, so that the direct current power network is protected from safe and stable operation, and the superconducting direct current limiter has a good application prospect in the power industry.
The resistive superconducting direct current limiter is the simplest in structure and the most widely used, and is mainly used for current limiting by depending on a resistor, a non-inductive superconducting coil is in a superconducting state in a normal state, and the non-inductive superconducting coil is converted into a normal state to generate a resistor when current limiting is needed or overcurrent occurs, so that current is limited.
However, a plurality of superconducting coils connected in parallel are arranged in the existing resistive superconducting direct current limiter, but the impedance of each parallel branch is different, so that when the short-circuit current rises, the short-circuit current in the parallel branches is also different, so that the quench levels of the parallel branches are different, the integral quench synchronism of the superconducting direct current limiter is further influenced, and the response speed to a short-circuit is reduced; and, if the difference is severe, the superconducting coil may be damaged.
For this purpose, the first embodiment of the present application firstly provides a superconducting dc current limiter, which can be seen from fig. 1 and fig. 2, and includes a plurality of non-inductive superconducting coils and inductor coils, for example, 2 non-inductive superconducting coils and 2 inductor coils may be provided, and of course, 3 non-inductive superconducting coils and 3 inductor coils (as shown in fig. 2) may also be provided, as long as the number of non-inductive superconducting coils and inductor coils is matched.
A non-inductive superconducting coil may be connected in series with an inductive coil to form a current-limiting branch. The plurality of current limiting branches can be connected in parallel.
It should be noted that the inductance coils on each current-limiting branch are all the same coil, have the same number of turns and coupling coefficient, and are all wound on a magnetic-conducting medium in the same direction, even if the current flows into or out of the end with the same name of each inductance coil. Therefore, when a short-circuit fault occurs in a circuit, the inductance of the inductance coil of each current-limiting branch is the same, the impedance of each current-limiting branch is matched, the rise rate of short-circuit current can be inhibited at the initial stage of the fault, the current on each current-limiting branch keeps small difference, and current equalization is realized.
The realization of current sharing is realized, firstly, the synchronism of quench of the non-inductive superconducting coils in each current-limiting branch is improved, and the response speed of the superconducting direct current limiter is accelerated; secondly, the risk of damage to the non-inductive superconducting coil caused by overlarge difference is avoided; thirdly, the addition of the inductance coil can inhibit the short-circuit current rise rate, and effectively solves the problems of the existing resistance type superconducting direct current limiter that the mechanical stress of the system is increased, the insulation level is reduced, overvoltage, heating and the like caused by low inductance and incapability of inhibiting the short-circuit current rise rate; fourthly, the overall impedance of the superconducting direct current limiter is improved, the fault current level can be effectively reduced in the later stage of the fault, and the fault can be removed in the effective time by matching with a direct current breaker, so that the safety of a power grid is guaranteed.
For the magnetic conductive medium, a non-closed structure can be selected, and a closed structure can also be selected. However, in this embodiment, referring to fig. 4, a magnetic conductive medium with a closed structure, such as a magnetic ring or a toroidal core, is selected. The magnetic conduction medium with the closed structure can reduce magnetic leakage, increase impedance in fault and be beneficial to restraining fault current.
The relative magnetic permeability of the magnetic conductive medium can be 7000 to 10000, for example, a silicon steel sheet can be selected.
The material of the inductance coil can be selected from conventional metals such as copper, aluminum, silver and the like, and can also be superconductors such as bismuth-series superconductors, yttrium-series superconductors, magnesium boride and the like. The inductor coil may be selected to have an inductance of between 0.4mH and 5mH and a resistance of between 2.2m Ω and 8.8m Ω.
The structure of the non-inductive superconducting coil has various structures, and in the embodiment, the non-inductive superconducting coil specifically comprises a superconducting tape and two insulating support materials. Specifically, referring to fig. 3, the superconducting tape is spirally wound inward from the first end, turned around with an S-shaped bend after reaching the center, and spirally wound outward in a reverse direction to lead out the second end. Two insulating support materials are arranged in a clamping channel formed by spirally winding the superconducting tape. The structure can ensure that two ends of one superconducting strip are arranged outside the coil and can offset the magnetic field generated when current flows through the two ends.
The above is a detailed description of the superconducting dc current limiter provided in the first embodiment of the present application. In order to adapt to different rated current working conditions, the second embodiment of the application provides a superconducting direct current limiting device, which comprises a plurality of superconducting direct current limiters of any one of the first embodiment.
In the superconducting direct current limiting device, the superconducting direct current limiters can be connected in series and/or in parallel according to requirements. For example, in this embodiment, 8 superconducting dc current limiters may be arranged to be connected in series and parallel, so that 4 of the superconducting dc current limiters are connected in series to form a first branch, another 4 superconducting dc current limiters are connected in series to form a second branch, and then the first branch and the second branch are connected in parallel to form a basic topology of the superconducting dc current limiting device in this embodiment, as shown in fig. 5. Of course, there may be different choices in the number of series-parallel structures and superconducting dc current limiters according to different rated current requirements.
In the selection of the non-inductive superconducting coil, the critical current at the liquid nitrogen temperature can be 450-500A, so that the critical current of the superconducting direct current limiter (comprising 3 current limiting branches) at the liquid nitrogen temperature can reach 1350-1500A as a whole.
It should be noted that, when the superconducting dc current limiting device is applied, the superconducting dc current limiting device may be directly connected in series in the power transmission line, and a preferable setting position is between the converter outlet of the dc power grid and the dc circuit breaker.
The above is a description of the superconducting dc current limiting device according to the second embodiment of the present application, and the specific operation process is as follows:
(1) when normal power transmission is carried out, the current I of the direct current transmission line is smaller than the critical current I of the superconducting direct current limiting devicecThe direct current I enters the superconducting direct current limiting device and then is divided (wherein the current flowing through each current-limiting branch of the a superconducting direct current limiter is Ia1、Ia2、Ia3) And the merged flow flows out from the output end of the superconducting direct current limiting device, and the superconducting direct current limiting device is in low impedance at the moment.
(2) When the direct current transmission line has short-circuit fault, the current flowing through the superconducting direct current limiters rapidly rises, and the inductance coil in each superconducting direct current limiter generates inductive reactance Lm1The current of each current-limiting branch of the superconducting direct current limiter is less differentThe uniform rising and the corresponding non-inductive superconducting coils are uniformly and synchronously quenched to generate large impedance to limit the level of short-circuit current.
(3) When the direct current breaker acts, the direct current transmission line is cut off, and the superconducting direct current limiting device gradually restores the superconducting state.
(4) When the fault is cleared and the superconducting direct current limiting device recovers the superconducting state, the power transmission system can be switched on to recover normal power transmission.
In order to verify the current sharing effect of the superconducting direct current limiting device provided by the present application, the applicant performed a simulation test, as shown in fig. 6, a superconducting direct current limiting device model (SFC L) was placed on a transmission line between converter stations a and B in a four-terminal flexible direct current transmission system, where the rated operating voltage of the transmission line is 160kV and the rated operating current is 1 kA.
FIG. 7 is an equivalent circuit of a superconducting DC current limiter, each current-limiting branch in the superconducting DC current limiter is equivalent to the low-temperature resistance R of a non-inductive superconducting coil and an inductive coil when the circuit is in normal operations11And RL11The series connection of (1); when the short-circuit fault occurs to the power transmission line, each current-limiting branch in the superconducting direct current limiter is equivalent to a resistor R 'after the quench of the non-inductive superconducting coil's11Inductor L of the inductor coilm1And low temperature resistance RL11Are connected in series.
Fig. 8 and 9 are graphs showing current changes of three current limiting branches of a superconducting dc current limiter in a superconducting dc current limiting device when a bipolar short circuit occurs in a transmission line between converter stations a and B, where fig. 8 corresponds to an unmodified existing superconducting dc current limiter, and fig. 9 corresponds to an improved superconducting dc current limiter provided by the present application.
Comparing fig. 8 and fig. 9, it can be known that when the short-circuit fault does not occur in the transmission line, the current I flows through the three current-limiting branchesa1、Ia2、Ia3Are all around 200A (the unit of ordinate is kA); after the short-circuit fault of the transmission line occurs, the current I flows through the three current-limiting branchesa1、Ia2、Ia3There is a large difference. In fig. 8, the increase rate of the short-circuit current of the conventional superconducting dc current limiter is significantly larger than that of the superconducting dc current limiter provided in the present application in fig. 9A device. In the existing superconductive DC current limiter, three current-limiting branch currents Ia1、Ia2、Ia3The maximum difference in (a) can be up to 500A; in the superconducting direct current limiter provided by the application, the short-circuit current rise rate is inhibited, and the current I of the three current limiting branchesa1、Ia2、Ia3Changes are synchronized with small differences.
Therefore, the superconducting direct current limiter provided by the application reduces the difference of fault currents in each current-limiting branch and realizes current sharing, thereby having the following advantages: firstly, the synchronism of quench of the non-inductive superconducting coils in each current-limiting branch is improved, and the response speed of the superconducting direct current limiter is accelerated; secondly, the risk of damage to the non-inductive superconducting coil caused by overlarge difference is avoided; thirdly, the addition of the inductance coil can inhibit the short-circuit current rise rate, and effectively solves the problems of the existing resistance type superconducting direct current limiter that the mechanical stress of the system is increased, the insulation level is reduced, overvoltage, heating and the like caused by low inductance and incapability of inhibiting the short-circuit current rise rate; fourthly, the overall impedance of the superconducting direct current limiter is improved, the fault current level can be effectively reduced in the later stage of the fault, and the fault can be removed in the effective time by matching with a direct current breaker, so that the safety of a power grid is guaranteed.
The terms "first," "second," "third," "fourth," and the like in the description of the application and the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "and/or" for describing the association relationship of the associated object, means that there may be three relationships, for example, "a and/or B" may mean: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A superconducting direct current limiter is characterized by comprising a plurality of non-inductive superconducting coils and inductive coils;
one said non-inductive superconducting coil is connected in series with one said inductance coil to form a current-limiting branch;
each current limiting branch is connected in parallel;
and each inductance coil is wound on a magnetic conductive medium in the same direction.
2. A superconducting direct current limiter according to claim 1 wherein said magnetically permeable medium has a closed configuration.
3. A superconducting direct current limiter according to claim 2 wherein the relative permeability of the magnetically permeable medium is between 7000 and 10000.
4. A superconducting direct current limiter according to claim 1, wherein said non-inductive superconducting coil comprises in particular a superconducting tape and two insulating support materials;
the superconducting strip is spirally and inwardly wound from the first end, turns around in an S-shaped bending mode after reaching the center, is spirally and outwardly wound in a reverse direction, and is led out of the second end;
the two insulating support materials are arranged in a clamping channel formed by spirally winding the superconducting tape.
5. A superconducting direct current limiter according to claim 1, wherein the inductance of said inductor coil is between 0.4mH and 5mH and the resistance is between 2.2m Ω and 8.8m Ω.
6. A superconducting direct current limiting device comprising a plurality of superconducting direct current limiters according to any one of claims 1 to 5;
the superconducting direct current limiters are connected in series and/or in parallel.
7. The superconducting direct current limiting device according to claim 6, comprising in particular an even number of said superconducting direct current limiters;
half of the superconducting direct current limiters are connected in series to form a first branch circuit; the other half of the superconducting direct current limiter is connected in series to form a second branch circuit;
the first branch is connected in parallel with the second branch.
8. The superconducting direct current limiting device according to claim 7, comprising in particular 8 of said superconducting direct current limiters.
9. The superconducting direct current limiting device according to claim 6, wherein the superconducting direct current limiter has 3 current limiting branches.
10. The superconducting direct current limiting device according to claim 6, wherein the superconducting direct current limiting device is disposed between a converter outlet of a direct current grid and a direct current breaker.
CN202010119507.4A 2020-02-26 2020-02-26 Superconducting direct current limiter and superconducting direct current limiting device Pending CN111463765A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113035488A (en) * 2021-04-20 2021-06-25 北京交通大学 Double-cake type non-inductive superconducting current-limiting coil

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Publication number Priority date Publication date Assignee Title
JPH097819A (en) * 1995-06-15 1997-01-10 Mitsubishi Electric Corp Superconductive device
CN102497086A (en) * 2011-11-30 2012-06-13 华为技术有限公司 Parallel current-equalizing circuit
CN102592774A (en) * 2012-03-06 2012-07-18 中国科学院电工研究所 Spacing layer of high-temperature super-conductivity non-inductive coil
CN206226001U (en) * 2016-11-15 2017-06-06 广东电网有限责任公司电力科学研究院 A kind of working capacity and the adjustable resistive superconducting current limiter of current-limiting resistance
CN110686785A (en) * 2019-09-24 2020-01-14 天津大学 Polarization insensitive superconducting avalanche single photon detector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH097819A (en) * 1995-06-15 1997-01-10 Mitsubishi Electric Corp Superconductive device
CN102497086A (en) * 2011-11-30 2012-06-13 华为技术有限公司 Parallel current-equalizing circuit
CN102592774A (en) * 2012-03-06 2012-07-18 中国科学院电工研究所 Spacing layer of high-temperature super-conductivity non-inductive coil
CN206226001U (en) * 2016-11-15 2017-06-06 广东电网有限责任公司电力科学研究院 A kind of working capacity and the adjustable resistive superconducting current limiter of current-limiting resistance
CN110686785A (en) * 2019-09-24 2020-01-14 天津大学 Polarization insensitive superconducting avalanche single photon detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113035488A (en) * 2021-04-20 2021-06-25 北京交通大学 Double-cake type non-inductive superconducting current-limiting coil

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Application publication date: 20200728