CN103647264A - Strong coupled type power failure current limiter - Google Patents
Strong coupled type power failure current limiter Download PDFInfo
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- CN103647264A CN103647264A CN201310704297.5A CN201310704297A CN103647264A CN 103647264 A CN103647264 A CN 103647264A CN 201310704297 A CN201310704297 A CN 201310704297A CN 103647264 A CN103647264 A CN 103647264A
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Abstract
The invention relates to a strong coupled type power failure current limiter. The strong coupled type power failure current limiter is provided with an iron core and a plurality of coils; the plurality of coils comprises alternating current coils and direct current coils; the alternating current coils wind on a plurality of iron coil columns on the iron core respectively and meanwhile a direct current coil winds on the iron core column with the plurality of iron core columns wound on; or the direct current coils wind on the plurality of iron core columns of the iron core respectively and meanwhile an alternating current coil winds on the iron columns with the direct current coils wound on; or the alternating current coils and the direct current coils wind on the plurality of iron core columns of the iron core respectively; more than two alternating current coils are in an end-to-end connection in a mode which enables voltages to be superposed; more than two direct current coils are in end-to-end connection in a mode which enables alternating current voltages inside the direct current coils to be offset mutually. According to the strong coupled type power failure current limiter, a strong couple structure is adopted to satisfy requirements that the impedance is low under normal state and the impedance is large under a short circuit condition, the influence to a system under the normal state is small, a current limit effect is good under a short circuit condition, and a requirement for system reclosing is satisfied.
Description
Technical field
The present invention relates to a kind of Fault Current Limiting Device that is applicable to electrical network, specifically a kind of close coupling type power failure flow restricter.
Background technology
Along with the development of electric power system, power system short circuit capacity increases day by day, and maximum short circuit current has even surpassed the maximum connecting-disconnecting function of circuit breaker; The increase of short circuit current level, the short circuit tolerance of power transmission and transforming equipment also requires further raising.In system, how limiting short-circuit current is excessive so just becomes a problem in the urgent need to address.
At present the common fault current limiter of application adopts solid-state switch type (being generally thyristor) more, because the operation of solid-state switch can make load current produce distortion, affects operation of power networks quality, and compensation investment cost is also high; Be subject to the impact of the withstand voltage and through-current capability of power electronic device simultaneously, in high-voltage large current system, be difficult to application.
Resistor-type flow restricter utilizes thermo-sensitive material under fault current, to produce large resistance, but the resistance in the time of can not solving reclosing recovers problem.
Weak coupling type flow restricter---core sataration type superconductive current limiter and permanent-magnetic AC reactor current restrictor, for a kind of alternating current-direct current weak coupling type flow restricter, can not finely meet the requirement that stable state impedance is low, current-limiting impedance is large, and application is not strong.
The power failure flow restricter that can meet at present high-voltage large current system requirements there is not yet report.
Summary of the invention
The weak points such as resistance recovery problem when can not finely meet the requirement that stable state impedance is low, current-limiting impedance is large and can not solve reclosing simultaneously for power failure flow restricter of the prior art, the technical problem to be solved in the present invention is: provide a kind of electric power system when normal condition, to show as Low ESR, during short-circuit condition, show as high impedance, and can meet the close coupling type power failure flow restricter of system reclosing requirement.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Close coupling type power failure flow restricter of the present invention, has an iron core and a plurality of coil, and described a plurality of coils comprise AC coil and DC coil; In a plurality of iron core column of described iron core, be wound around separately AC coil, in the iron core column of a plurality of winding AC coil, be wound around a DC coil simultaneously; Or in a plurality of iron core column of iron core, be wound around separately DC coil, in the iron core column of a plurality of winding DC coils, be wound around an AC coil simultaneously; Or in a plurality of iron core column of iron core, be wound around separately an AC coil and be wound around separately a DC coil simultaneously; Two above AC coil so that the mode of voltage stack join end to end; Two above DC coils so that the mode that in DC coil, ac induction voltage is cancelled out each other join end to end.
Described iron core is block form or polystyle.
The iron core column cross section of the part section section ratio winding around of the DC loop not overlapping with ac circuit in iron core is little.
The Double layer iron yoke of iron core adopts the pressure yoke structure of enlarging section.
Or close coupling type power failure flow restricter of the present invention, has a plurality of iron cores and a plurality of coil, described a plurality of coils comprise AC coil and DC coil; In a plurality of iron core column of described each iron core, be wound around separately AC coil, in the iron core column of a plurality of winding AC coil, be wound around a DC coil simultaneously; Or in a plurality of iron core column of each iron core, be wound around separately DC coil, in the iron core column of a plurality of winding DC coils, be wound around an AC coil simultaneously; Or in one or more iron core column of each iron core, be wound around separately AC coil and be wound around separately a DC coil simultaneously, cored all AC coil so that the mode of voltage stack join end to end; All DC coils so that in DC coil the ac induction voltage mode of cancelling out each other join end to end.
Described iron core is block form or polystyle.
The iron core column cross section of the part section section ratio winding around of the DC loop not overlapping with ac circuit in iron core is little.
The Double layer iron yoke of iron core adopts the pressure yoke structure of enlarging section.
The present invention has following beneficial effect and advantage:
1. the present invention has adopted close coupling structure, can be fine meet under normal condition that impedance is low, the large requirement of impedance under short-circuit conditions, and very little to systematic influence under normal condition, under short-circuit conditions, current limliting is effective.
2. the present invention has realized the quick switching of high/low impedance by the power failure flow restricter of a close coupling structure, can meet the requirement of system reclosing.
3. the present invention's not generation current distortion when system is normally moved, without increasing Electric capacity compensation device, cost is low.
4. flow restricter of the present invention is passive response for the response of short circuit current, and by the increase of short circuit current, resistance increases automatically, and the response time is almost nil.
5. the present invention is simple in structure, is easy to realize, safe, reliability is high.
Accompanying drawing explanation
Fig. 1 is four-column type list iron core list DC coil structure elementary diagram in first embodiment of the invention;
Fig. 2 is block form list iron core list DC coil structure elementary diagram in first embodiment of the invention;
Fig. 3 is the two DC coil structure elementary diagrams of four-column type list iron core in first embodiment of the invention;
Fig. 4 is six pillar list iron core four DC coil structure elementary diagrams in first embodiment of the invention;
Fig. 5 is many shaped iron core combined structures elementary diagram () in second embodiment of the invention;
Fig. 6 is many shaped iron core combined structures elementary diagram (two) in second embodiment of the invention;
Fig. 7 is many shaped iron core combined structures elementary diagram (three) in second embodiment of the invention;
Fig. 8 is many shaped iron core combined structures elementary diagram (four) in second embodiment of the invention;
Fig. 9 is many shaped iron core combined structures elementary diagram (five) in second embodiment of the invention;
Figure 10 is many shaped iron core combined structures elementary diagram (six) in second embodiment of the invention.
Embodiment
The present invention is a kind of close coupling type power failure flow restricter, and one or more DC coils can be wrapped in a plurality of iron core column that have an AC coil simultaneously, and one or more AC coil also can be wrapped in a plurality of iron core column that have a DC coil simultaneously.
Embodiment 1
As shown in Fig. 1～4, close coupling type power failure flow restricter has an iron core and a plurality of coil, and a plurality of coils comprise AC coil and DC coil; In a plurality of iron core column of described iron core, be wound around separately AC coil, in the iron core column of a plurality of winding AC coil, be wound around a DC coil simultaneously; Or in a plurality of iron core column of iron core, be wound around separately DC coil, in the iron core column of a plurality of winding DC coils, be wound around an AC coil simultaneously.
In Fig. 1, two iron core column are wound around respectively an AC coil (representing with fine rule) separately, and two AC coil are connected in series, and both Same Name of Ends joined end to end; A DC coil (representing with thick line) is wrapped in above-mentioned two iron core column simultaneously.Alternating current-direct current has different flux circuits, and the leakage flux that AC coil causes can be independently closed, and the supplementary load loss of generation are less.Structure shown in Fig. 1 can adopt superconducting coil and/or normal conductor coil.
Figure 2 shows that the second version of the present embodiment, adopt a block form iron core, exchange flux forms closed flux circuit in iron core square frame, and direct current flux loop is comprised of iron core square frame, air and fuel tank.This structure iron core weight is less, has saved a large amount of manufacturing costs.Structure shown in Fig. 2 can adopt superconducting coil and/or normal conductor coil.
Figure 3 shows that the third version of the present embodiment, have two AC coil and two DC coils, two iron core column are wound around respectively an AC coil separately, and two AC coil are connected in series, and both Same Name of Ends joined end to end; Meanwhile, each iron core column is also wound around respectively a DC coil separately, and two DC coils are connected in series, and two DC coil ac induction voltages offset.Structure shown in Fig. 3 adopts normal conductor coil only.
The 4th kind of version that Figure 4 shows that the present embodiment, has four AC coil and four DC coils, and four iron core column are wound around respectively an AC coil separately, and four AC coil are connected in series, and both Same Name of Ends joined end to end; Meanwhile, each iron core column is also wound around respectively a DC coil separately, and four DC coils are connected in series, and four DC coil ac induction voltages offset.Structure shown in Fig. 4 adopts normal conductor coil only.
When having more AC coil, the same so that mode of voltage stack of AC coil joins end to end; When having more DC coils, the same so that mode that a plurality of DC coil ac induction voltages are cancelled out each other of DC coil joins end to end.That is to say, the induced voltage of a plurality of AC coil is overlaying relation, and the induced voltage of a plurality of DC coils is counteracting relation, or a DC coil induced voltage is zero substantially.
The iron core column quantity of winding around is even number, and every column iron core all has AC coil and DC coil and its close coupling.The present invention makes core sataration by DC coil, and at this moment AC coil obtains a low impedance state, and this state is applied when system is normally worked.
When system is short-circuited, the ampere-turn of AC coil surpasses the ampere-turn of DC coil, and this device can show as the limited current state of high impedance without any need for operation, and shows a more limited current state for high impedance after excision direct current.
After short circuit occurs, before system automatic reclosing, DC coil makes core sataration again, shows as again a Low ESR.
The iron core column cross section of the part section section ratio winding around of the DC loop not overlapping with ac circuit in iron core is little.This kind of structure can improve response speed, saves cost.
The Double layer iron yoke of iron core adopts the pressure yoke structure of enlarging section, can improve current-limiting impedance, reduces stable state impedance, reduces stray loss, reduces cost of transportation.
Embodiment 2
As shown in Fig. 5～10, be with the difference of embodiment 1: have a plurality of iron cores and a plurality of coil, described a plurality of coils comprise AC coil and DC coil; In a plurality of iron core column of described each iron core, be wound around separately AC coil, in the iron core column of a plurality of winding AC coil, be wound around a DC coil simultaneously; Or in a plurality of iron core column of each iron core, be wound around separately DC coil, in the iron core column of a plurality of winding DC coils, be wound around an AC coil simultaneously; Cored all AC coil so that the mode of voltage stack join end to end; Cored all DC coils so that in DC coil the ac induction voltage mode of cancelling out each other join end to end.
Fig. 5 is the extend type of Fig. 1, and the structure tandem compound shown in two picture groups 1 has two four-column type iron cores, and four iron core column are wound around respectively an AC coil (representing with fine rule) separately, and four AC coil are connected in series, and both Same Name of Ends joined end to end; Two DC coils (representing with thick line) series connection, alternating current-direct current has different flux circuits, and the leakage flux that AC coil causes can be independently closed, and the supplementary load loss of generation are less.Structure shown in Fig. 5 can adopt superconducting coil and/or normal conductor coil.
In the present embodiment, be not limited to the quantity of the iron core shown in Fig. 5, iron core column and AC and DC coil, can extend by the most amounts of the rule shown in Fig. 5, can realize higher levels of parameter request, simultaneously convenient design, technique manufacture and transportation.
Fig. 6 is the extend type of Fig. 2, the structure tandem compound shown in two picture groups 2.In the present embodiment, be not limited to the quantity of the iron core shown in Fig. 6, iron core column and AC and DC coil, can extend by the most amounts of the rule shown in Fig. 6.This structure iron core weight is less, has saved a large amount of manufacturing costs.
Fig. 7 is the extend type of Fig. 3, the structure tandem compound shown in two picture groups 3.Have a plurality of iron cores and a plurality of coil, a plurality of coils comprise AC coil and DC coil; Or in one or more iron core column of each iron core, be wound around separately AC coil and be wound around separately a DC coil (Fig. 7,8,9 is this class formation) simultaneously, cored all AC coil so that the mode of voltage stack join end to end; All DC coils so that in DC coil the ac induction voltage mode of cancelling out each other join end to end.
As shown in Figure 8, adopt two block form iron cores, in each iron core square frame, direct current has identical flux circuit with exchanging.Each iron core column is all wound around alternating current-direct current coil separately, has like this four AC coil and four DC coils, four AC coil so that the mode of voltage stack join end to end; Four DC coils are so that the mode of voltage offset joins end to end, and direct current has identical flux circuit with exchanging.This kind of structure can be saved material in a large number, reduces costs.
As shown in Figure 9, adopt two three pillar type iron cores, the center pillar of each iron core is wound around respectively an AC coil and a DC coil, two AC coil so that the mode of voltage stack join end to end; Two DC coils so that the mode of voltage offset join end to end.This kind of structure can reduce the wastage.
As shown in figure 10, be the textural association shown in Fig. 1 and Fig. 2.
The present embodiment can also be Fig. 1,8 combinations, Fig. 1,2,8 combinations, or Fig. 2,2,3,8,9,9 combinations etc. are too numerous to enumerate.
The various occluder configurations that form alone or in combination, can meet the different parameters requirement of various application occasions above, form the standard series of design, facilitate the aspects such as type selecting, design, technique manufacture and transportation.
Claims (8)
1. a close coupling type power failure flow restricter, is characterized in that: have an iron core and a plurality of coil, described a plurality of coils comprise AC coil and DC coil; In a plurality of iron core column of described iron core, be wound around separately AC coil, in the iron core column of a plurality of winding AC coil, be wound around a DC coil simultaneously; Or in a plurality of iron core column of iron core, be wound around separately DC coil, in the iron core column of a plurality of winding DC coils, be wound around an AC coil simultaneously; Or in a plurality of iron core column of iron core, be wound around separately an AC coil and be wound around separately a DC coil simultaneously; Two above AC coil so that the mode of voltage stack join end to end; Two above DC coils so that the mode that in DC coil, ac induction voltage is cancelled out each other join end to end.
2. by close coupling type power failure flow restricter claimed in claim 1, it is characterized in that: described iron core is block form or polystyle.
3. by close coupling type power failure flow restricter claimed in claim 1, it is characterized in that: the iron core column cross section of the part section section ratio winding around of the DC loop not overlapping with ac circuit in iron core is little.
4. by close coupling type power failure flow restricter claimed in claim 1, it is characterized in that: the Double layer iron yoke of iron core adopts the pressure yoke structure of enlarging section.
5. a close coupling type power failure flow restricter, is characterized in that: have a plurality of iron cores and a plurality of coil, described a plurality of coils comprise AC coil and DC coil; In a plurality of iron core column of described each iron core, be wound around separately AC coil, in the iron core column of a plurality of winding AC coil, be wound around a DC coil simultaneously; Or in a plurality of iron core column of each iron core, be wound around separately DC coil, in the iron core column of a plurality of winding DC coils, be wound around an AC coil simultaneously; Or in one or more iron core column of each iron core, be wound around separately AC coil and be wound around separately a DC coil simultaneously, cored all AC coil so that the mode of voltage stack join end to end; All DC coils so that in DC coil the ac induction voltage mode of cancelling out each other join end to end.
6. by close coupling type power failure flow restricter claimed in claim 5, it is characterized in that: described iron core is block form or polystyle.
7. by close coupling type power failure flow restricter claimed in claim 5, it is characterized in that: the iron core column cross section of the part section section ratio winding around of the DC loop not overlapping with ac circuit in iron core is little.
8. by close coupling type power failure flow restricter claimed in claim 5, it is characterized in that: the Double layer iron yoke of iron core adopts the pressure yoke structure of enlarging section.
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| CN201310704297.5A CN103647264B (en) | 2013-12-19 | 2013-12-19 | Close coupling type power failure current limiter |
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| CN201310704297.5A CN103647264B (en) | 2013-12-19 | 2013-12-19 | Close coupling type power failure current limiter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048429A (en) * | 2015-03-30 | 2015-11-11 | 国家电网公司 | Strong magnetic coupling and magnetic saturation switch-type fault current limiter and control method thereof |
| CN105529694A (en) * | 2016-02-01 | 2016-04-27 | 上海理工大学 | Saturated core-type fault current limiter capable of relieving DC impact |
| CN105811387A (en) * | 2016-05-12 | 2016-07-27 | 广东电网有限责任公司电力科学研究院 | Novel coupling power fault current limiter |
| CN106710849A (en) * | 2016-11-18 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Tight-coupling superconducting current limiting reactor |
| CN107181245A (en) * | 2017-05-15 | 2017-09-19 | 东南大学 | A kind of single-phase saturable core type fault current limiter |
| CN108767833A (en) * | 2018-07-27 | 2018-11-06 | 国电南瑞科技股份有限公司 | Single-phase magneto-restrictive fault current limiter |
| CN109655677A (en) * | 2017-10-10 | 2019-04-19 | 特变电工衡阳变压器有限公司 | Current-limiting reactor multifunction test device, test method and manufacturing method |
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| CN102709041A (en) * | 2012-06-11 | 2012-10-03 | 武汉大学 | Superconducting variable leakage-reactance controllable electric reactor |
| CN102723704A (en) * | 2012-06-14 | 2012-10-10 | 武汉大学 | Magnetic switch type short-circuit current fault detection method and device for same |
| CN203660523U (en) * | 2013-12-19 | 2014-06-18 | 特变电工沈阳变压器集团有限公司 | Strong coupling type electric power failure current limiter |
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| US6016094A (en) * | 1996-07-13 | 2000-01-18 | Forschungszentrum Karlsruhe Gmbh | Superconducting short circuit current limiter |
| CN102709041A (en) * | 2012-06-11 | 2012-10-03 | 武汉大学 | Superconducting variable leakage-reactance controllable electric reactor |
| CN102723704A (en) * | 2012-06-14 | 2012-10-10 | 武汉大学 | Magnetic switch type short-circuit current fault detection method and device for same |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048429A (en) * | 2015-03-30 | 2015-11-11 | 国家电网公司 | Strong magnetic coupling and magnetic saturation switch-type fault current limiter and control method thereof |
| CN105529694A (en) * | 2016-02-01 | 2016-04-27 | 上海理工大学 | Saturated core-type fault current limiter capable of relieving DC impact |
| CN105529694B (en) * | 2016-02-01 | 2017-12-26 | 上海理工大学 | Mitigate the saturable core type fault current limiter of direct current impact |
| CN105811387A (en) * | 2016-05-12 | 2016-07-27 | 广东电网有限责任公司电力科学研究院 | Novel coupling power fault current limiter |
| WO2017193983A1 (en) * | 2016-05-12 | 2017-11-16 | 广东电网有限责任公司电力科学研究院 | Novel coupling power fault current limiter |
| CN106710849A (en) * | 2016-11-18 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Tight-coupling superconducting current limiting reactor |
| CN107181245A (en) * | 2017-05-15 | 2017-09-19 | 东南大学 | A kind of single-phase saturable core type fault current limiter |
| CN109655677A (en) * | 2017-10-10 | 2019-04-19 | 特变电工衡阳变压器有限公司 | Current-limiting reactor multifunction test device, test method and manufacturing method |
| CN108767833A (en) * | 2018-07-27 | 2018-11-06 | 国电南瑞科技股份有限公司 | Single-phase magneto-restrictive fault current limiter |
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