CN203660523U - Strong coupling type electric power failure current limiter - Google Patents
Strong coupling type electric power failure current limiter Download PDFInfo
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- CN203660523U CN203660523U CN201320849210.9U CN201320849210U CN203660523U CN 203660523 U CN203660523 U CN 203660523U CN 201320849210 U CN201320849210 U CN 201320849210U CN 203660523 U CN203660523 U CN 203660523U
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Abstract
The utility model relates to a strong coupling type electric power failure current limiter which comprises an iron core and a plurality of coils, and the coils comprises AC coils and DC coils; the AC coils wind a plurality of iron core columns of the iron core respectively, and one DC coil winds the iron core columns, which are wound with the AC coils, at the same time; or the DC coils winds the iron core columns of the iron core respectively, and one AC coil winds the iron core columns, which are wound with the DC coils, at the same time; or the AC coils wind the iron core columns of the iron core respectively, and, at the same time, the DC coils wind the iron core columns of the iron core respectively; more than two AC coils are connected end to end in a manner that voltages are superimposed; and more than two DC coils are connected end to end in a manner that AC induction voltages in the DC coils are offset against each other. Through adoption of the strong coupling structure, requirements that a resistance is low in a normal state and high under a short-circuit condition are satisfied, influences on a system are small in the normal state, a current-limiting effect is good under the short-circuit condition, and a requirement of reclosing of the system can be satisfied.
Description
Technical field
The utility model 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 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 system, how limiting short-circuit current is excessive so just becomes a problem in the urgent need to address.
The common fault current limiter of application adopts solid-state switch type (being generally thyristor) more at present, produces distortion because the operation of solid-state switch can make load current, 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 can not solve reclosing time 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.
Utility model content
The weak points such as the resistance recovery problem when can not finely meeting 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 problems to be solved in the utility model is: provide a kind of electric power system in the time of normal condition, to show as Low ESR, when 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 adopted in the utility model is:
The utility model close coupling type power failure flow restricter, has an iron core and multiple coil, and described multiple coils comprise AC coil and DC coil; In multiple iron core column of described iron core, be wound around separately AC coil, in the iron core column of multiple winding AC coil, be wound around a DC coil simultaneously; Or in multiple iron core column of iron core, be wound around separately DC coil, in the iron core column of multiple winding DC coils, be wound around an AC coil simultaneously; Or in multiple iron core column of iron core, be wound around separately an AC coil and be wound around separately a DC coil simultaneously; More than two AC coil so that the mode of voltage stack join end to end; More than two DC coil 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.
Or the utility model close coupling type power failure flow restricter, has multiple iron cores and multiple coil, described multiple coils comprise AC coil and DC coil; In multiple iron core column of described each iron core, be wound around separately AC coil, in the iron core column of multiple winding AC coil, be wound around a DC coil simultaneously; Or in multiple iron core column of each iron core, be wound around separately DC coil, in the iron core column of multiple 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 utlity model has following beneficial effect and advantage:
1. the utility model 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 utility model has been 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 utility model not generation current distortion in the time that system is normally moved, without increasing Electric capacity compensation device, cost is low.
4. the utility model flow restricter 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 utility model 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 utility model;
Fig. 2 is block form list iron core list DC coil structure elementary diagram in first embodiment of the utility model;
Fig. 3 is the two DC coil structure elementary diagrams of four-column type list iron core in first embodiment of the utility model;
Fig. 4 is six pillar list iron core four DC coil structure elementary diagrams in first embodiment of the utility model;
Fig. 5 is many shaped iron core combined structures elementary diagram () in second embodiment of the utility model;
Fig. 6 is many shaped iron core combined structures elementary diagram (two) in second embodiment of the utility model;
Fig. 7 is many shaped iron core combined structures elementary diagram (three) in second embodiment of the utility model;
Fig. 8 is many shaped iron core combined structures elementary diagram (four) in second embodiment of the utility model;
Fig. 9 is many shaped iron core combined structures elementary diagram (five) in second embodiment of the utility model;
Figure 10 is many shaped iron core combined structures elementary diagram (six) in second embodiment of the utility model.
Embodiment
The utility model is a kind of close coupling type power failure flow restricter, and one or more DC coils can be wrapped in multiple iron core column that have AC coil simultaneously, and one or more AC coil also can be wrapped in multiple iron core column that have DC coil simultaneously.
Embodiment 1
As shown in Fig. 1～4, close coupling type power failure flow restricter has an iron core and multiple coil, and multiple coils comprise AC coil and DC coil; In multiple iron core column of described iron core, be wound around separately AC coil, in the iron core column of multiple winding AC coil, be wound around a DC coil simultaneously; Or in multiple iron core column of iron core, be wound around separately DC coil, in the iron core column of multiple 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; 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 made up 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.
In the time having more AC coil, the same so that mode of voltage stack of AC coil joins end to end; In the time having more DC coils, the same so that mode that multiple 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 multiple AC coil is overlaying relation, and the induced voltage of multiple 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 utility model makes core sataration by DC coil, and at this moment AC coil obtains a low impedance state, and this state is applied in the time that system is normally worked.
In the time that 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 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 multiple iron cores and multiple coil, described multiple coils comprise AC coil and DC coil; In multiple iron core column of described each iron core, be wound around separately AC coil, in the iron core column of multiple winding AC coil, be wound around a DC coil simultaneously; Or in multiple iron core column of each iron core, be wound around separately DC coil, in the iron core column of multiple 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 is closure independently, 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 multiple iron cores and multiple coil, multiple 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 above, can meet the different parameters requirement of various application occasions, 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 multiple coil, described multiple coils comprise AC coil and DC coil; In multiple iron core column of described iron core, be wound around separately AC coil, in the iron core column of multiple winding AC coil, be wound around a DC coil simultaneously; Or in multiple iron core column of iron core, be wound around separately DC coil, in the iron core column of multiple winding DC coils, be wound around an AC coil simultaneously; Or in multiple iron core column of iron core, be wound around separately an AC coil and be wound around separately a DC coil simultaneously; More than two AC coil so that the mode of voltage stack join end to end; More than two DC coil so that in DC coil the ac induction voltage mode of cancelling 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 multiple iron cores and multiple coil, described multiple coils comprise AC coil and DC coil; In multiple iron core column of described each iron core, be wound around separately AC coil, in the iron core column of multiple winding AC coil, be wound around a DC coil simultaneously; Or in multiple iron core column of each iron core, be wound around separately DC coil, in the iron core column of multiple 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849210.9U CN203660523U (en) | 2013-12-19 | 2013-12-19 | Strong coupling type electric power failure current limiter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849210.9U CN203660523U (en) | 2013-12-19 | 2013-12-19 | Strong coupling type electric power failure current limiter |
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| Publication Number | Publication Date |
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| CN203660523U true CN203660523U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320849210.9U Withdrawn - After Issue CN203660523U (en) | 2013-12-19 | 2013-12-19 | Strong coupling type electric power failure current limiter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647264A (en) * | 2013-12-19 | 2014-03-19 | 特变电工沈阳变压器集团有限公司 | Strong coupled type power failure current limiter |
| CN105391039A (en) * | 2015-11-18 | 2016-03-09 | 武汉大学 | Parallel magnetic saturation fault current limiter based on rare earth permanent magnet material |
-
2013
- 2013-12-19 CN CN201320849210.9U patent/CN203660523U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647264A (en) * | 2013-12-19 | 2014-03-19 | 特变电工沈阳变压器集团有限公司 | Strong coupled type power failure current limiter |
| CN103647264B (en) * | 2013-12-19 | 2016-01-13 | 特变电工沈阳变压器集团有限公司 | Close coupling type power failure current limiter |
| CN105391039A (en) * | 2015-11-18 | 2016-03-09 | 武汉大学 | Parallel magnetic saturation fault current limiter based on rare earth permanent magnet material |
| CN105391039B (en) * | 2015-11-18 | 2018-04-20 | 武汉大学 | A kind of parallel connection type magnetic saturation fault current limiter based on rare earth permanent-magnetic material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140618 Effective date of abandoning: 20160113 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |