CN102074331B - Magnetic saturation reactor - Google Patents
Magnetic saturation reactor Download PDFInfo
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- CN102074331B CN102074331B CN2010105840411A CN201010584041A CN102074331B CN 102074331 B CN102074331 B CN 102074331B CN 2010105840411 A CN2010105840411 A CN 2010105840411A CN 201010584041 A CN201010584041 A CN 201010584041A CN 102074331 B CN102074331 B CN 102074331B
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Abstract
The invention relates to a magnetic saturation reactor, which can reduce the volume and the weight of the magnetic saturation reactor under the condition of meeting performance requirements and can reduce the reactance of the magnetic saturation reactor in a magnetic saturation state. The magnetic saturation reactor comprise a theta-shaped structural magnetic saturation reactor core, wherein a reactive coil L1 and a direct current coil L2 are respectively arranged on one side of the magnetic saturation reactor; a reactive coil L3 and a direct current coil L4 are respectively arranged on the other side of the magnetic saturation reactor; the corresponding end of the reactive coil L1 is one alternating current terminal I of an alternating current loop of the magnetic saturation reactor; the unlike end of the reactive coil L1 is connected with the corresponding end of the reactive coil L3; the unlike end of the reactive coil L3 is the other alternating current terminal II of the alternating current loop of the magnetic saturation reactor; the corresponding end of the direct current coil L2 is connected with the corresponding end of the direct current coil L4; the unlike end of the direct current coil L2 is one direct current terminal I of the alternating current loop of the magnetic saturation reactor; and the unlike end of the direct current coil L4 is the other direct current terminal II of the alternating current loop of the magnetic saturation reactor.
Description
Technical field
The present invention relates to electric power system and send the power transformation field, particularly a kind of magnetic saturation reactor.
Background technology
Along with the continuous development of electric power system, the continuous rising of generate output, the electric power system short circuit current that causes that is short-circuited is very big.The be short-circuited short circuit current that causes of electric power system is very big to the harm of electric power system.When protective relaying device is short-circuited in electric power system, send trip signal, make circuit breaker trip, cutting-off of short-circuit electric current.The system limited in one's ability of circuit breaker cutting-off of short-circuit electric current, short circuit current surpass when circuit breaker is maximum to cut off current value, and circuit breaker can't cutting-off of short-circuit electric current.Therefore, reduce short circuit current, can make the circuit breaker can cutting-off of short-circuit electric current, reduce the extent of damage of power equipment when short circuit, improve the stability of electric power system.
The method and apparatus of Recent study limiting short-circuit current (also claiming demand limiter) becomes heat subject.
Utilize the saturation characteristic of magnetic saturation reactor iron core to constitute demand limiter.On the magnetic saturation reactor iron core, increase by one group of dc coil, when electric power system normally moved, DC power supply provided direct current to dc coil, made the iron core degree of depth of magnetic saturation reactor saturated.When the iron core degree of depth of magnetic saturation reactor was saturated, magnetic saturation reactor presented little reactance; The demand limiter that is connected in the transmission line does not influence normal transmission of electricity.When electric power system was short-circuited, control module was cut off the direct current of dc coil, and the iron core of magnetic saturation reactor breaks away from saturated; Magnetic saturation reactor presents very big reactance.The magnetic saturation reactor that is connected in the transmission line provides constraints to short circuit current, reduces short circuit current.
" a kind of short-circuit current limiting device of magnetic saturation reactor " of the patent No. 2008101604501 and " short-circuit current limiting device and the method " of the patent No. 2008101592788 are one of results of study of this respect.Magnetic saturation reactor is the nucleus equipment of magnetic saturation reactive current limiter, also is the most valuable equipment, and its characteristic directly influences the performance index of demand limiter.There is shortcoming in the structure of the saturable reactor that existing magnetic saturation reactive current limiter is used.Satisfying volume and the weight that how to reduce magnetic saturation reactor under the performance requirement condition, under the magnetic saturation state, the reactance value that how to reduce magnetic saturation reactor is one of research direction.
Summary of the invention
The object of the invention is exactly in order to address the above problem, and provides a kind of and is satisfying the volume and the weight that can reduce magnetic saturation reactor under the performance requirement condition; Under the magnetic saturation state, can reduce a kind of magnetic saturation reactor of the reactance value of magnetic saturation reactor.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of magnetic saturation reactor, it comprises:
A magnetic saturation reactor iron core; The magnetic saturation reactor iron core is a day font structure; Magnetic saturation reactor iron core one side is installed reactance coil L1 and dc coil L2 respectively; Magnetic saturation reactor iron core opposite side is installed reactance coil L3 and dc coil L4 respectively; Reactance coil L1 is identical with the technological requirement of reactance coil L3 structure, the number of turn, winding method; Dc coil L2 is identical the same with the technological requirement of dc coil L4 structure, the number of turn, winding method;
The end of the same name of reactance coil L1 is one of them ac terminal I of magnetic saturation reactor ac circuit; The different name end of reactance coil L1 is connected with the end of the same name of reactance coil L3, and the different name end of reactance coil L3 is another ac terminal II of magnetic saturation reactor ac circuit;
The end of the same name of dc coil L2 is connected with the end of the same name of dc coil L4; The different name end of dc coil L2 is one of them dc terminal I of magnetic saturation reactor DC loop, and the different name end of dc coil L4 is another dc terminal II of magnetic saturation reactor DC loop.
Said magnetic saturation reactor iron core day font structure is an axle with middle iron core center line, bilateral symmetry; Middle iron core forms the magnetic flux closed loop, middle iron core and another magnetic flux closed loop of opposite side iron core formation with a side iron core wherein; The both sides iron core forms the 3rd magnetic flux closed loop; The sectional area of both sides iron core equates; The sectional area of middle iron core is more than or equal to the sectional area of a side iron core wherein, but is less than or equal to 2 times of wherein sectional areas of a side iron core.
Said magnetic saturation reactor reactance coil L1 and the coiling of dc coil L2 level; Magnetic saturation reactor reactance coil L3 and the coiling of dc coil L4 level.
Said reactance coil L1 and reactance coil L3 are alternating current path; Dc coil L2 and dc coil L4 are DC channel.
The invention provides provides a kind of and is satisfying volume and the weight that reduces magnetic saturation reactor under the performance requirement condition; Under the magnetic saturation state, reduce a kind of magnetic saturation reactor structure and the connected mode of the reactance value of magnetic saturation reactor.
The invention has the beneficial effects as follows: reduce in the iron core that satisfies magnetic saturation reactor under the performance requirement condition, coil turn, weight; Under the magnetic saturation state, the reactance value of magnetic saturation reactor is lower.Magnetic saturation reactor of the present invention is used for demand limiter, and during the operation of electric power system normally, the loss of voltage at magnetic saturation reactor two ends reduces 30%.
Description of drawings
Fig. 1 representes magnetic saturation reactor structure and connected mode;
Fig. 2 representes magnetic saturation reactor reactance coil and dc coil ectonexine aggregated(particle) structure;
Wherein, 1. ac terminal I, 2. ac terminal II, 3. dc terminal I, 4. dc terminal II, 5. magnetic saturation reactor iron core.
Embodiment
Below in conjunction with accompanying drawing the present invention is further specified.
Magnetic saturation reactor structure and connected mode are as shown in Figure 1.Device ac terminal I1 and ac terminal II2 polyphone incoming transport transmitting loop; Device dc terminal I3 and dc terminal II4 polyphone insert direct current power supply loop.
Because the end of the same name of reactance coil L1 is the ac terminal I1 of magnetic saturation reactor ac circuit, the different name end of reactance coil L1 is connected with the end of the same name of reactance coil L3, and the different name end of reactance coil L3 is the ac terminal II of magnetic saturation reactor ac circuit; Again because reactance coil L1 and reactance coil L3 structure, the number of turn, winding method technological requirement are identical; So, the magnetic flux Φ 2 that the alternating current that magnetic flux Φ 1 and the reactance coil L2 that the alternating current that flows through at reactance coil L1 produces in iron core flows through produces in iron core, equal and opposite in direction, in the opposite direction.Exchange flux only can flow in the 3rd the magnetic flux closed loop that magnetic saturation reactor day type structure both sides iron core forms, not can from magnetic saturation reactor day font structure middle iron core mobile.At present, already used magnetic saturation reactor structure is the twoport font structure, and exchange flux circulates in two hollow structures.Exchange flux of the present invention path is shorter than present already used twoport font structure magnetic saturation reactor exchange flux path.Under the identical exciting current condition, the iron core of magnetic saturation reactor of the present invention and coil turn can reduce.
If the dc coil L2 of magnetic saturation reactor, dc coil L4 direct current are zero; The magnetic saturation reactor iron core breaks away from saturation condition, and the reactance that is connected on reactance coil L1 in the transmitting loop, reactance coil L3 is very big.
The end of the same name of dc coil L2 is connected with the end of the same name of dc coil L4, and the different name end of dc coil L2 is one of them dc terminal I3 of magnetic saturation reactor DC loop, and the different name end of dc coil L4 is the dc terminal II4 of magnetic saturation reactor DC loop.Reactance coil L1 produces the power frequency magnetic flux in the magnetic saturation reactor iron core, this power frequency magnetic flux produces induced electromotive force at dc coil L2; Reactance coil L3 produces the power frequency magnetic flux in the magnetic saturation reactor iron core, this power frequency magnetic flux produces induced electromotive force at dc coil L4; Because dc coil L2 is identical with the technological requirement of dc coil L4 structure, the number of turn, winding method; The power frequency induced electromotive force of dc coil L2 is kept to zero mutually with the power frequency induced electromotive force of dc coil L4, and the alternating current of reactance coil L1, reactance coil L3 does not exert an influence to DC loop.
When flowing through direct current among the dc coil L3, middle iron core and dc coil L3 belong to a side iron core and form the magnetic flux closed loop; When flowing through direct current among the dc coil L4, middle iron core and dc coil L4 belong to a side iron core and form the magnetic flux closed loop; These two flux circuits cover the flux circuit of exchange flux fully.So when direct current flux made the place core sataration, the iron core of exchange flux also was saturated simultaneously.The magnetic saturation reactor iron core is in saturation condition, and the reactance that is connected on reactance coil L1 in the transmitting loop, reactance coil L3 is very little, to not influence of transmission system.
When flowing through direct current among the dc coil L3, the magnetic flux Φ 3 that in iron core, produces; When flowing through direct current among the dc coil L4, the magnetic flux Φ 4 that in iron core, produces.Φ 3 and Φ 4 equal and opposite in directions, direction is identical; Φ 3 and Φ 4 flow through the middle iron core of magnetic saturation reactor day font structure simultaneously.Magnetic saturation reactor iron core day font structure is an axle with middle iron core, bilateral symmetry; Middle iron core forms the magnetic flux closed loop with a side iron core wherein, middle iron core and another magnetic flux closed loop of opposite side iron core formation, and the both sides iron core forms the 3rd magnetic flux closed loop.The sectional area of both sides iron core equates; When the sectional area of middle iron core equals 2 times wherein during the sectional area of a side iron core, saturated if middle iron core does not have, then the both sides iron core can be unsaturated yet; If middle core sataration, then the both sides iron core is also simultaneously saturated; The number of ampere turns of dc coil L3, dc coil L4 is fully used.When the sectional area of middle iron core less than 2 times wherein during the sectional area of a side iron core, saturated if middle iron core does not have, then the both sides iron core can be unsaturated yet; If middle core sataration, then the both sides iron core is not necessarily saturated; If the both sides core sataration, then middle iron core is necessarily saturated; The number of ampere turns of dc coil L3, dc coil L4 is not fully used.At middle core sataration, and the both sides iron core does not have under the saturation conditions, needs to increase direct current and makes the both sides core sataration; Or do not increase direct current, and increase the method for the dc coil number of turn, make the both sides core sataration.The sectional area of middle iron core has reduced iron core weight less than 2 times of sectional areas of a side iron core wherein.If the sectional area of middle iron core is less than the sectional area of a side iron core wherein, it is more then to increase the dc coil number of turn, loses more than gain.So the sectional area of middle iron core is more than or equal to the sectional area of a side iron core wherein, but be less than or equal to 2 times of wherein sectional areas of a side iron core.
Dc coil L3 and dc coil L4 can replace with a coil that is wound on the middle iron core of magnetic saturation reactor day font structure, and the advantage of doing like this is to practice thrift a coil, reduces power consumption; Shortcoming is that the coupling of dc coil and reactance coil is close inadequately, and when dc coil flow through direct current, it is good not enough that the reactance that is connected on reactance coil L1 in the transmitting loop, reactance coil L3 descends.
The AC coil of present already used magnetic saturation reactor all is wound on respectively on the different iron core column with dc coil.Because the dc coil above earth potential is low, the voltage difference between AC coil and the dc coil is big; If AC coil is wound on the identical iron core column with dc coil, the short circuit between AC coil and the dc coil just might take place, damage the equipment that connects dc coil.Magnetic saturation reactor of the present invention is that patent of invention number is: the corollary equipment of 2010105753926 " current limiting device and methods with flexible switch characteristic "; In this invention; The dc coil above earth potential is high, and the voltage difference between AC coil and the dc coil is little; AC coil is wound on the identical iron core column with dc coil, and the probability that short circuit between AC coil and the dc coil takes place descends.In this invention; The current potential that connects the equipment of dc coil will raise along with the rising of AC coil current potential automatically; The equipment that connects dc coil has the High-Voltage Insulation measure over the ground, even short circuit between AC coil and the dc coil takes place, also can not damage the equipment that connects dc coil.So,, can invent the more superior magnetic saturation reactor structure of performance because the change of applied environment has determined that the structure of magnetic saturation reactor can be different.The AC coil of magnetic saturation reactor of the present invention is wound on the identical iron core column with the dc coil level, has strengthened the magnetic coupling of AC coil and dc coil.The direct current of dc coil makes core sataration, and what the reactance of magnetic saturation reactor AC coil descended under the core sataration condition is littler, and is littler to the adverse effect of the normal transmission of electricity of electric power system.
Fig. 2 representes a kind of ectonexine aggregated(particle) structure of magnetic saturation reactor reactance coil and dc coil.Can magnetic saturation reactor reactance coil L1 (L3) at skin, dc coil L2 (L4) is at internal layer; Also can magnetic saturation reactor reactance coil L1 (L3) at internal layer, dc coil L2 (L4) is at skin; Can also replace level with dc coil L2 (L4) by magnetic saturation reactor reactance coil L1 (L3).
Each parts of said a kind of magnetic saturation reactor structure and connected mode can manufacture and design with prior art, can realize fully.Broad prospect of application is arranged.
Claims (3)
1. magnetic saturation reactor is characterized in that it comprises:
A magnetic saturation reactor iron core; The magnetic saturation reactor iron core is a day font structure; Magnetic saturation reactor iron core one side is installed reactance coil L1 and dc coil L2 respectively; Magnetic saturation reactor iron core opposite side is installed reactance coil L3 and dc coil L4 respectively;
The end of the same name of reactance coil L1 is one of them ac terminal I of magnetic saturation reactor ac circuit; The different name end of reactance coil L1 is connected with the end of the same name of reactance coil L3, and the different name end of reactance coil L3 is another ac terminal II of magnetic saturation reactor ac circuit;
The end of the same name of dc coil L2 is connected with the end of the same name of dc coil L4; The different name end of dc coil L2 is one of them dc terminal I of magnetic saturation reactor DC loop, and the different name end of dc coil L4 is another dc terminal II of magnetic saturation reactor DC loop; Said magnetic saturation reactor iron core day font structure is an axle with middle iron core center line, bilateral symmetry; Middle iron core forms the magnetic flux closed loop, middle iron core and another magnetic flux closed loop of opposite side iron core formation with a side iron core wherein; The both sides iron core forms the 3rd magnetic flux closed loop; The sectional area of both sides iron core equates; The sectional area of middle iron core is more than or equal to the sectional area of a side iron core wherein, but is less than or equal to 2 times of wherein sectional areas of a side iron core; Said reactance coil L1 and reactance coil L3 are alternating current path; Dc coil L2 and dc coil L4 are DC channel; AC coil is wound on the identical iron core column with the dc coil level; The magnetic flux Φ 2 that the alternating current that magnetic flux Φ 1 and the reactance coil L3 that the alternating current that flows through at reactance coil L1 produces in iron core flows through produces in iron core, equal and opposite in direction, in the opposite direction; Exchange flux only can flow in the 3rd the magnetic flux closed loop that magnetic saturation reactor day type structure both sides iron core forms, not can from magnetic saturation reactor day font structure middle iron core mobile.
2. a kind of magnetic saturation reactor as claimed in claim 1 is characterized in that, said magnetic saturation reactor reactance coil L1 and the coiling of dc coil L2 level; Magnetic saturation reactor reactance coil L3 and the coiling of dc coil L4 level.
3. magnetic saturation reactor as claimed in claim 1 is characterized in that, it is characterized in that, said reactance coil L1 and reactance coil L3 structure, the number of turn, winding method technology are identical; Dc coil L2 and dc coil L4 structure, the number of turn, winding method technology are identical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105840411A CN102074331B (en) | 2010-12-13 | 2010-12-13 | Magnetic saturation reactor |
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| CN2010105840411A CN102074331B (en) | 2010-12-13 | 2010-12-13 | Magnetic saturation reactor |
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| CN102074331A CN102074331A (en) | 2011-05-25 |
| CN102074331B true CN102074331B (en) | 2012-07-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2905789A4 (en) * | 2013-12-12 | 2015-12-02 | Huawei Tech Co Ltd | Coupled inductor and power converter |
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| CN102436907B (en) * | 2011-12-22 | 2014-01-01 | 广州金升阳科技有限公司 | Magnetic core for transformer |
| CN102592807B (en) * | 2012-02-09 | 2014-07-16 | 山东大学 | On-load tap switch of saturable reactor with switch characteristics |
| US9601262B2 (en) * | 2013-12-12 | 2017-03-21 | Huawei Technologies Co., Ltd. | Coupled inductor and power converter |
| CN103840472A (en) * | 2014-02-11 | 2014-06-04 | 中冶南方工程技术有限公司 | Reactive power fluctuation restraining device of electric-arc furnace |
| CN103871716A (en) * | 2014-02-18 | 2014-06-18 | 同济大学 | Integrated magnetic structure |
| CN104376967B (en) * | 2014-11-28 | 2016-11-02 | 山东大学 | The quick direct-curent saturable reactor of a kind of reaction |
| CN110911118A (en) * | 2019-12-12 | 2020-03-24 | 深圳市恺深达电子科技有限公司 | Integrated Y-shaped PFC inductor |
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| GB686532A (en) * | 1948-06-28 | 1953-01-28 | Bendix Aviat Corp | Improvements in devices for converting alternating-current signals into corresponding direct current signals and for re-converting the latter into alternating-current signals of a desired frequency |
| TW525091B (en) * | 2000-10-05 | 2003-03-21 | Koninkl Philips Electronics Nv | Retargetable compiling system and method |
| CN2911906Y (en) * | 2006-06-20 | 2007-06-13 | 上海追日电气有限公司 | Controllable 3-phase combined reactor |
| CN101521374B (en) * | 2008-11-18 | 2011-01-12 | 李晓明 | Short-circuit current limiting device of magnetic saturation reactor |
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| EP2905789A4 (en) * | 2013-12-12 | 2015-12-02 | Huawei Tech Co Ltd | Coupled inductor and power converter |
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