WO2011108793A1 - 전력계통의 모선전압 강하를 억제하는 초전도 전류제한기 - Google Patents
전력계통의 모선전압 강하를 억제하는 초전도 전류제한기 Download PDFInfo
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- WO2011108793A1 WO2011108793A1 PCT/KR2010/007266 KR2010007266W WO2011108793A1 WO 2011108793 A1 WO2011108793 A1 WO 2011108793A1 KR 2010007266 W KR2010007266 W KR 2010007266W WO 2011108793 A1 WO2011108793 A1 WO 2011108793A1
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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
-
- 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 superconducting current limiter that suppresses a bus voltage drop in a power system. More particularly, the present invention relates to limiting the magnitude of a fault current through rapid resistance generation using magnetic coupling, The present invention relates to a device for supplying power for suppressing dropping.
- FIGS. 1 to 3 are diagrams showing an example of a conventional superconducting current limiter.
- the superconducting current limiter shown in FIGS. 1 to 3 uses magnetic coupling between two coils (primary winding and secondary winding) connected to the same core, and the wiring form between the primary winding and the secondary winding is shown in FIG. 1.
- FIG. 2 the non-isolated parallel connection, the non-isolated series connection, and the non-isolated type are shown in FIG. 3.
- the superconductor HTSC
- the superconductor maintains the zero resistance in the superconducting state, and the magnetic fluxes generated by the two coils cancel each other, so that the voltage induced in each coil becomes zero.
- the superconducting current limiter using magnetic coupling of two coils can divide the burden of power caused by failure into two coils and superconductors connected in a non-isolated (parallel or series) or insulated type, thereby reducing the number of superconductors.
- the superconductors connected in series may induce a phase quench.
- a failure occurs, a problem occurs in that the voltage drop of the bus voltage occurs. Therefore, a method for solving the problem is needed.
- the technical problem to be achieved by the present invention is to limit the fault current by generating a resistance of the superconductor when a fault occurs, to prevent the drop of the bus voltage by separating the fault section, the bus voltage drop of the power system that can supply the power stably It is to provide a superconducting current limiter to suppress the.
- the superconducting current limiter for suppressing the bus voltage drop of the power system according to the present invention, the primary winding, the secondary winding and the third winding connected to the same core core; A superconductor connected to any one of the primary winding and the secondary winding; A first switch connected to any one of the primary winding and the secondary winding to open for separation of a fault section when a fault current is generated and to be shorted when the fault current is removed; And a second switch connected in series with the tertiary winding and shorted for stable power supply when the fault current is generated and opened when the fault current is removed.
- the fault current is limited by a switch while limiting the fault current by using magnetic coupling of two coils connected in a non-isolated (parallel or series) or insulated type.
- a switch By using the 3rd winding and the switch connected to it, it is possible to improve the stability of the system and obtain economical effect by supplying the power stably in the section where the bus voltage drop occurs due to the fault current.
- 1 to 3 is a view showing an example of a conventional superconducting current limiter
- FIG. 4 is a diagram illustrating a magnetic field applying coil connected to an existing superconducting current limiter having two coils connected to the same core;
- FIG. 6 is a view showing a first embodiment of a superconducting current limiter for suppressing bus voltage drop of a power system according to the present invention
- FIG. 7 is a view showing a second embodiment of a superconducting current limiter for suppressing a bus voltage drop of a power system according to the present invention.
- FIG. 8 is a view showing a third embodiment of a superconducting current limiter for suppressing bus voltage drop of a power system according to the present invention.
- FIG. 11 is a graph showing the current limiting and uninterruptible power supply characteristics of the superconducting current limiter according to the present invention.
- FIG. 12 is a view showing a first embodiment when a superconducting current limiter according to the present invention is applied to a distribution system in which a short circuit occurs;
- FIG. 13 is a view showing a second embodiment when a superconducting current limiter according to the present invention is applied to a distribution system in which a short circuit occurs;
- FIG. 14 is a view showing a third embodiment when the superconducting current limiter according to the present invention is applied to a distribution system in which a short circuit occurs;
- 15 is a graph illustrating a change in voltage and current when a conventional superconducting current limiter is applied.
- 16 is a graph showing changes in voltage and current when the superconducting current limiter according to the present invention is applied.
- FIG. 4 is a diagram illustrating a magnetic field applying coil connected to an existing superconducting current limiter having two coils connected to the same core.
- a tertiary winding is further connected to the same core as the primary winding and the secondary winding connected in parallel, and a magnetic field coil is installed on the tertiary winding.
- a current flows through the tertiary winding due to the quench of the superconductor, causing a magnetic field to affect the resistance of the superconductor.
- FIG. 5 is a graph showing the resistance of the superconductor according to the magnitude of the magnetic field generated in the magnetic field applying coil. Referring to FIG. 5, it can be seen that the resistance of the superconductor slowly increases after a current flows through the tertiary winding.
- the superconducting current limiter includes three coils 112, 114, 116, superconductor 120, two switches 132, 134, and three wires connected to the same core core. Voltage sensors 142, 144, 146 and three current sensors 152, 154, 156.
- the primary winding 112 and the secondary winding 114 may be non-isolated in series or in parallel with each other, or may be connected insulated.
- the primary winding 112 and the secondary winding 114 are connected in a non-insulated parallel manner
- the second embodiment shown in FIG. Are connected in series, and are connected insulated in the third embodiment shown in FIG.
- the superconductor 120 is connected to the primary winding 112 or the secondary winding 114 in a non-isolated or insulated type as shown in FIGS. 6 to 8 to limit the fault current.
- the tertiary winding 116 is connected to the same core as the primary winding 112 and the secondary winding 114.
- the tertiary winding 116 is connected to the second switch 134, which will be described later, and is provided to stably supply power to a section in which a drop in bus voltage occurs when a fault current is generated.
- opening or shorting of the second switch 134 may be performed by the third voltage sensor 146 or the third current sensor 156 connected to the tertiary winding 116.
- the operation of the first switch 132 provided to separate the fault section may be controlled by one of the following several methods.
- the first switch 132 may be opened.
- UVR under voltage relay
- the second switch 134 should be shorted to supply power to the section where the bus voltage drops due to the fault.
- the short-circuit of the second switch 134 is made by the third voltage sensor 146 or the third current sensor 156.
- the third winding measured by the third voltage sensor 146.
- the third voltage sensor 146 short-circuits the second switch 134 so that power is supplied to the bus to which the voltage drops.
- An operation method of the first switch 132 and the second switch 134 is not limited to the above-described method, and the second switch 134 may be operated by the same method as that of operating the first switch 132.
- the first switch 132 may be operated by the same method as that of operating the second switch 134.
- each of the voltage sensors 142, 144, and 146 and the current sensors 152, 154, and 156 may individually set a reference voltage or a reference current for operating the switches 132 and 134.
- the third voltage sensor 146 is connected to the second switch 134. Open it again. Since the first switch 132 is shorted by one of the methods described above by the fault removal, the superconducting current limiter according to the present invention is restored to the state before the failure.
- FIG. 9 is a graph showing changes in voltage and current in each part over time, and currents i 1 to i 3 are shown in FIGS. 4A and 4B. Referring to FIG. 9, it can be seen that voltage and current are generated in the coil as a failure occurs.
- FIG. 10 is a graph illustrating the operation of each switch 132 and 134 when a failure occurs.
- SW 1 illustrates the operation of the first switch 132
- SW 2 illustrates the operation of the second switch 134.
- FIG 11 is a waveform illustrating current limiting and power supply characteristics of the superconducting current limiter according to the present invention. As a failure occurs, the superconductor 120 rapidly detects a fault current to limit the current and the bus voltage during the breakdown period. It can be seen that the stable supply of power in the section where the descent occurs.
- FIG. 12 to 14 are diagrams illustrating first to third embodiments when the superconducting current limiter according to the present invention is applied to a distribution system in which a short circuit occurs.
- FIG. 12 shows a case where the first embodiment of the present invention shown in FIG. 6 is applied
- FIG. 13 shows a case where the second embodiment of the present invention shown in FIG. 7 is applied
- FIG. 14 is shown in FIG.
- the case where the third embodiment of the present invention is applied is shown.
- 12 to 14 show a case in which a short occurs in the load 1 and the voltage drops.
- 15 and 16 are graphs showing voltage and current changes when the conventional superconducting current limiter is applied, and graphs showing voltage and current changes when the superconducting current limiter according to the present invention is applied.
- the superconducting current limiter when a conventional superconducting current limiter is applied to a distribution system, when a failure occurs, the fault current (i p1 ) is limited, but a drop in the bus voltage (V bus ) occurs, so that not only the fault feeder but also the sound feeder are used. Undervoltage relay (UVR) can be operated to confirm that the power failure section occurs.
- the superconducting current limiter according to the present invention unlike the conventional superconducting current limiter, not only restricts the fault current i p1 when a fault occurs, but also decreases the bus voltage V bus due to a short circuit. Can be compensated by a stable power supply.
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- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims (6)
- 동일한 철심코어에 결선된 1차 권선, 2차 권선 및 3차 권선;상기 1차 권선 및 상기 2차 권선 중 어느 하나와 연결된 초전도체;상기 1차 권선 및 상기 2차 권선 중 어느 하나와 연결되어 고장전류가 발생하면 고장구간의 분리를 위해 개방되고, 상기 고장전류가 제거되면 단락되는 제1스위치; 및상기 3차 권선과 직렬연결되어 상기 고장전류의 발생시 안정적인 전원 공급을 위해 단락되고, 상기 고장전류가 제거되면 개방되는 제2스위치;를 포함하는 것을 특징으로 하는 초전도 전류제한기.
- 제 1항에 있어서,상기 고장전류의 발생에 의해 상기 초전도체에서 측정된 전압 또는 전류의 값이 증가하면 상기 제1스위치가 개방되고 상기 제2스위치가 단락되는 것을 특징으로 하는 초전도 전류제한기.
- 제 1항에 있어서,상기 고장전류의 발생에 의해 부하에서 측정된 전압 또는 전류의 값이 감소하면 상기 제1스위치가 개방되고 상기 제2스위치가 단락되는 것을 특징으로 하는 초전도 전류제한기.
- 제 1항에 있어서,상기 고장전류의 발생에 의해 상기 3차 권선에서 측정된 전압 또는 전류의 값이 증가하면 상기 제1스위치가 개방되고 상기 제2스위치가 단락되는 것을 특징으로 하는 초전도 전류제한기.
- 제 1항에 있어서,상기 제1스위치 및 상기 제2스위치는 상기 고장전류의 발생 또는 제거가 차단기에 의해 감지되면 상기 차단기로부터 전송된 신호에 기초하여 통신에 의해 개방 또는 단락되는 것을 특징으로 하는 초전도 전류제한기.
- 제 1항에 있어서,상기 제1스위치는 부족 전압 계전기(Under Voltage Relay : UVR)이며, 상기 제2스위치는 상기 제1스위치의 동작에 따른 제어신호에 의해 동작하는 것을 특징으로 하는 초전도 전류 제한기.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2012556009A JP5390030B2 (ja) | 2010-03-03 | 2010-10-22 | 電力系統のバス電圧降下を抑制する超伝導電流制限器 |
US13/582,444 US8810978B2 (en) | 2010-03-03 | 2010-10-22 | Superconducting fault current limiter for suppressing bus voltage drop in electric power system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2010-0019061 | 2010-03-03 | ||
KR1020100019061A KR101037713B1 (ko) | 2010-03-03 | 2010-03-03 | 고장전류 제한 및 무정전 전원공급을 위한 초전도 전류제한기 |
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WO2011108793A1 true WO2011108793A1 (ko) | 2011-09-09 |
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PCT/KR2010/007266 WO2011108793A1 (ko) | 2010-03-03 | 2010-10-22 | 전력계통의 모선전압 강하를 억제하는 초전도 전류제한기 |
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US (1) | US8810978B2 (ko) |
JP (1) | JP5390030B2 (ko) |
KR (1) | KR101037713B1 (ko) |
WO (1) | WO2011108793A1 (ko) |
Cited By (2)
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CN103354145A (zh) * | 2013-06-19 | 2013-10-16 | 北京云电英纳超导电缆有限公司 | 超导故障限流器绕组分段式结构 |
CN106300310A (zh) * | 2016-08-16 | 2017-01-04 | 河北五良盟合环保技术有限公司 | 一种有载限流恒压箱式变压器 |
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US8914085B2 (en) * | 2011-06-09 | 2014-12-16 | Varian Semiconductor Equipment Associates, Inc. | Superconducting fault current limiter monitoring |
US8971002B1 (en) * | 2013-08-22 | 2015-03-03 | Varian Semiconductor Equipment Associates, Inc. | System and method of providing isolated power to gate driving circuits in solid state fault current limiters |
US9270110B2 (en) | 2013-12-10 | 2016-02-23 | Varian Semiconductor Equipment Associates, Inc. | Fault current limiter with interleaved windings |
CN203722202U (zh) | 2014-02-18 | 2014-07-16 | 通用电气(中国)研究开发中心有限公司 | 断路器 |
CN104253424A (zh) * | 2014-10-20 | 2014-12-31 | 湖南大学 | 新型饱和铁芯高温超导限流器并可作为谐波抑制器 |
KR101785838B1 (ko) * | 2016-04-12 | 2017-10-17 | 숭실대학교산학협력단 | 두 개의 동작전류 조절이 가능한 비절연 이차권선을 갖는 변압기형 초전도 한류기 |
US10284008B2 (en) | 2016-09-13 | 2019-05-07 | Abb Schweiz Ag | Isolated parallel ups system with fault location detection |
US10199861B2 (en) | 2016-09-13 | 2019-02-05 | Abb Schweiz Ag | Isolated parallel UPS system with choke bypass switch |
KR101883558B1 (ko) * | 2016-09-20 | 2018-07-30 | 한국전력공사 | 인버터 기반 독립형 마이크로그리드 내 선로 단락 고장구간 절체 시스템 및 절체 방법 |
KR102230392B1 (ko) * | 2019-05-03 | 2021-03-22 | 오석환 | 배전반, 무정전 전원장치(ups), 버스덕트의 셀프 냉각 장치 |
CN112072624B (zh) * | 2020-09-15 | 2022-11-18 | 国网山东省电力公司济南市历城区供电公司 | 一种基于铁芯式分裂电抗器的故障限流器 |
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- 2010-10-22 US US13/582,444 patent/US8810978B2/en active Active
- 2010-10-22 WO PCT/KR2010/007266 patent/WO2011108793A1/ko active Application Filing
- 2010-10-22 JP JP2012556009A patent/JP5390030B2/ja not_active Expired - Fee Related
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CN106300310A (zh) * | 2016-08-16 | 2017-01-04 | 河北五良盟合环保技术有限公司 | 一种有载限流恒压箱式变压器 |
Also Published As
Publication number | Publication date |
---|---|
JP5390030B2 (ja) | 2014-01-15 |
US8810978B2 (en) | 2014-08-19 |
KR101037713B1 (ko) | 2011-05-27 |
JP2013521753A (ja) | 2013-06-10 |
US20120327538A1 (en) | 2012-12-27 |
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