CN103647264B - Close coupling type power failure current limiter - Google Patents
Close coupling type power failure current limiter Download PDFInfo
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- CN103647264B CN103647264B CN201310704297.5A CN201310704297A CN103647264B CN 103647264 B CN103647264 B CN 103647264B CN 201310704297 A CN201310704297 A CN 201310704297A CN 103647264 B CN103647264 B CN 103647264B
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Abstract
The present invention relates to a kind of close coupling type power failure current limiter, have an iron core and multiple coil, described multiple coil comprises AC coil and DC coil; Multiple iron core column of described iron core are wound around AC coil separately, the iron core column of multiple winding AC coil is wound around a DC coil simultaneously; Or multiple iron core column of iron core are wound around DC coil separately, the iron core column of multiple winding DC coil is wound around an AC coil simultaneously; Or multiple iron core column of iron core are wound around separately an AC coil and are wound around a DC coil separately simultaneously; Two or more AC coil joins end to end to make the mode of voltage superposition; Two or more DC coil joins end to end in the mode making ac induction voltage in DC coil and cancel out each other.Present invention employs close coupling structure, meet well that impedance under normal condition is low, impedance is large under short-circuit conditions requirement, very little to systematic influence under normal condition, under short-circuit conditions, current limliting is effective, can meet the requirement of system reclosing.
Description
Technical field
The present invention relates to a kind of Fault Current Limiting Device being applicable to electrical network, specifically a kind of close coupling type power failure current limiter.
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 exceeded 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 such system, how limiting short-circuit current is excessive just becomes a problem in the urgent need to address.
Common fault current limiter many employings solid-state switch type (being generally thyristor) of current application, the operation due to solid-state switch can make load current produce distortion, and affect operation of power networks quality, compensation investment cost is also high; Simultaneously by the impact of the withstand voltage and through-current capability of power electronic device, in high-voltage large current system, be difficult to application.
Resistance-type current restrictor utilizes thermo-sensitive material to produce large resistance under fault current, but resistance when can not solve reclosing recovers problem.
Weak coupling type flow restricter---core sataration type superconductive current limiter and permanent-magnetic AC reactor current restrictor, be a kind of alternating current-direct current weak coupling type flow restricter, can not meet the requirement that steady state impedance is low, current-limiting impedance is large very well, application is not strong.
There is not been reported can to meet the power failure current limiter of high-voltage large current system requirements at present.
Summary of the invention
The weak points such as resistance recovery problem when can not meet steady state impedance is low, current-limiting impedance is large requirement very well for power failure current limiter of the prior art and reclosing can not be solved simultaneously, the technical problem to be solved in the present invention is: provide a kind of electric power system to show as Low ESR when normal condition, show as high impedance during short-circuit condition, and the close coupling type power failure current limiter of system reclosing requirement can be met.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Close coupling type power failure current limiter of the present invention, has an iron core and multiple coil, and described multiple coil comprises AC coil and DC coil; Multiple iron core column of described iron core are wound around AC coil separately, the iron core column of multiple winding AC coil is wound around a DC coil simultaneously; Or multiple iron core column of iron core are wound around DC coil separately, the iron core column of multiple winding DC coil is wound around an AC coil simultaneously; Or multiple iron core column of iron core are wound around separately an AC coil and are wound around a DC coil separately simultaneously; Two or more AC coil joins end to end to make the mode of voltage superposition; Two or more DC coil joins end to end in the mode making ac induction voltage in DC coil and cancel out each other.
Described iron core is block form or polystyle.
The iron core column cross section of the part way section ratio winding around of the DC loop do not overlapped 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 current limiter of the present invention, has multiple iron core and multiple coil, and described multiple coil comprises AC coil and DC coil; Multiple iron core column of described each iron core are wound around AC coil separately, the iron core column of multiple winding AC coil is wound around a DC coil simultaneously; Or multiple iron core column of each iron core are wound around DC coil separately, the iron core column of multiple winding DC coil is wound around an AC coil simultaneously; Or one or more iron core column of each iron core are wound around separately an AC coil and are wound around a DC coil separately, cored all AC coil join end to end to make the mode of voltage superposition simultaneously; All DC coils join end to end in the mode making ac induction voltage in DC coil and cancel out each other.
Described iron core is block form or polystyle.
The iron core column cross section of the part way section ratio winding around of the DC loop do not overlapped 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. present invention employs close coupling structure, can meet that impedance under normal condition is low very well, impedance is large under short-circuit conditions requirement, very little to systematic influence under normal condition, under short-circuit conditions, current limliting is effective.
2. the present invention achieves the quick switching of high/low impedance by the power failure current limiter 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 run, without the need to 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. structure of the present invention is simple, is easy to realize, and fail safe is high, 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 diagram 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 current limiter, and one or more DC coil can be wrapped in simultaneously multiplely to be had in the iron core column of AC coil, and one or more AC coil also can be wrapped in simultaneously multiplely to be had in the iron core column of DC coil.
Embodiment 1
As shown in figures 1-4, close coupling type power failure current limiter has an iron core and multiple coil, and multiple coil comprises AC coil and DC coil; Multiple iron core column of described iron core are wound around AC coil separately, the iron core column of multiple winding AC coil is wound around a DC coil simultaneously; Or multiple iron core column of iron core are wound around DC coil separately, the iron core column of multiple winding DC coil is wound around an AC coil simultaneously.
In Fig. 1, two iron core column are wound around an AC coil (representing with fine rule) respectively 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 independently close, 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 made up of iron core square frame, air and fuel tank.This structure iron core weight is less, saves 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 an AC coil respectively 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 a DC coil respectively 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.
Figure 4 shows that the 4th kind of version of the present embodiment, have four AC coil and four DC coils, four iron core column are wound around an AC coil respectively 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 a DC coil respectively 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 there being more AC coil, AC coil is equally to make the mode of voltage superposition join end to end; When there being more DC coils, DC coil joins end to end in the mode making multiple DC coil ac induction voltage cancel out each other equally.That is, the induced voltage of multiple AC coil is overlaying relation, and the induced voltage of multiple DC coil 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 worked well.
When system is short-circuited, the ampere-turn of AC coil exceedes 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 after excision direct current, show the limited current state of a more high impedance.
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 way section ratio winding around of the DC loop do not overlapped 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 steady 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 multiple iron core and multiple coil, described multiple coil comprises AC coil and DC coil; Multiple iron core column of described each iron core are wound around AC coil separately, the iron core column of multiple winding AC coil is wound around a DC coil simultaneously; Or multiple iron core column of each iron core are wound around DC coil separately, the iron core column of multiple winding DC coil is wound around an AC coil simultaneously; Cored all AC coil join end to end to make the mode of voltage superposition; Cored all DC coils join end to end in the mode making ac induction voltage in DC coil and cancel out each other.
Fig. 5 is the extend type of Fig. 1, and the structures in series combination shown in two picture groups 1, has two four-column type iron cores, and four iron core column are wound around an AC coil (representing with fine rule) respectively separately, and four AC coil are connected in series, and both Same Name of Ends joined end to end; Two DC coil (representing with thick line) series connection, alternating current-direct current has different flux circuits, and the leakage flux that AC coil causes can independently close, 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 rule majority amount shown in Fig. 5, higher levels of parameter request can be realized, simultaneously convenient design, manufacture technics and transport.
Fig. 6 is the extend type of Fig. 2, the structures in series combination 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 rule majority amount shown in Fig. 6.This structure iron core weight is less, saves a large amount of manufacturing costs.
Fig. 7 is the extend type of Fig. 3, the structures in series combination shown in two picture groups 3.Have multiple iron core and multiple coil, multiple coil comprises AC coil and DC coil; Or one or more iron core column of each iron core are wound around separately an AC coil and are wound around a DC coil (Fig. 7,8,9 is this class formation) separately, cored all AC coil join end to end to make the mode of voltage superposition simultaneously; All DC coils join end to end in the mode making ac induction voltage in DC coil and cancel out each other.
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 respective alternating current-direct current coil, has four AC coil and four DC coils like this, and four AC coil join end to end to make the mode of voltage superposition; Four DC coils join end to end to make the mode of voltage offset, and direct current has identical flux circuit with exchanging.This kind of structure can save 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 an AC coil and a DC coil respectively, and two AC coil join end to end to make the mode of voltage superposition; Two DC coils join end to end to make the mode of voltage offset.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 combination, Fig. 1,2,8 combination, or Fig. 2,2,3,8,9,9 combination etc. too numerous to enumerate.
Various occluder configurations alone or in combination above, can meet the different parameters requirement of various application occasions, forms the standard series of design, facilitates the aspects such as type selecting, design, manufacture technics and transport.
Claims (8)
1. a close coupling type power failure current limiter, is characterized in that: have an iron core and multiple coil, and described multiple coil comprises AC coil and DC coil; Multiple iron core column of described iron core are wound around AC coil separately, the iron core column of multiple winding AC coil is wound around a DC coil simultaneously; Or multiple iron core column of iron core are wound around DC coil separately, the iron core column of multiple winding DC coil is wound around an AC coil simultaneously; Or multiple iron core column of iron core are wound around separately an AC coil and are wound around a DC coil separately simultaneously; Two or more AC coil joins end to end to make the mode of voltage superposition; Two or more DC coil joins end to end in the mode making ac induction voltage in DC coil and cancel out each other.
2., by close coupling type power failure current limiter according to claim 1, it is characterized in that: described iron core is block form or polystyle.
3., by close coupling type power failure current limiter according to claim 1, it is characterized in that: the iron core column cross section of the part way section ratio winding around of the DC loop do not overlapped with ac circuit in iron core is little.
4. by close coupling type power failure current limiter according to 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 current limiter, is characterized in that: have multiple iron core and multiple coil, and described multiple coil comprises AC coil and DC coil; Multiple iron core column of described each iron core are wound around AC coil separately, the iron core column of multiple winding AC coil is wound around a DC coil simultaneously; Or multiple iron core column of each iron core are wound around DC coil separately, the iron core column of multiple winding DC coil is wound around an AC coil simultaneously; Or one or more iron core column of each iron core are wound around separately an AC coil and are wound around a DC coil separately, cored all AC coil join end to end to make the mode of voltage superposition simultaneously; All DC coils join end to end in the mode making ac induction voltage in DC coil and cancel out each other.
6., by close coupling type power failure current limiter according to claim 5, it is characterized in that: described iron core is block form or polystyle.
7., by close coupling type power failure current limiter according to claim 5, it is characterized in that: the iron core column cross section of the part way section ratio winding around of the DC loop do not overlapped with ac circuit in iron core is little.
8. by close coupling type power failure current limiter according to 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN105811387B (en) * | 2016-05-12 | 2018-07-24 | 广东电网有限责任公司电力科学研究院 | A kind of coupled mode power failure 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 |
| CN109655677B (en) * | 2017-10-10 | 2021-09-03 | 特变电工衡阳变压器有限公司 | Multifunctional test device, test method and manufacturing method of current-limiting reactor |
| 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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| 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 |
| 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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- 2013-12-19 CN CN201310704297.5A patent/CN103647264B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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