CN202796387U - Cover structure for suppressing electromagnetic interference of air-core reactor - Google Patents
Cover structure for suppressing electromagnetic interference of air-core reactor Download PDFInfo
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- CN202796387U CN202796387U CN2012205163463U CN201220516346U CN202796387U CN 202796387 U CN202796387 U CN 202796387U CN 2012205163463 U CN2012205163463 U CN 2012205163463U CN 201220516346 U CN201220516346 U CN 201220516346U CN 202796387 U CN202796387 U CN 202796387U
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- core reactor
- radome
- reactor
- air core
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Abstract
The utility model discloses a cover structure for suppressing electromagnetic interference of an air-core reactor. The cover structure comprises a shielding cover, insulating columns and the air-core reactor, and is characterized in that the shielding cover is arranged on the top of the air-core reactor through the insulating columns; and the side wall of the shielding cover extends downwards to cover the air-core reactor. The cover structure has the advantages that the shielding cover is not grounded, and thus fault phenomena of overheating, sparking and the like caused by high current generated on the shielding cover are avoided. The cover structure is simple, has a good radiating effect, contributes to processing of structural pieces, and can save materials; and moreover, the air-core reactor is not required to be subjected to three-phase symmetrical balance, can be flexibly arranged and is convenient to mount, and the space is effectively saved.
Description
Technical field
The utility model relates to a kind of reactor, particularly a kind of cover body structure that suppresses the air core reactor electromagnetic interference.
Background technology
Along with developing rapidly of transmission line, net capacity is increasing, so that the rated value of system short circuit capacity increases rapidly.In order to limit the short circuit current of transmission line, the protection power equipment must be installed air core reactor, and air core reactor can reduce short circuit current and the voltage of transcient short circuit time system is remained unchanged.In capacitor loops air core reactor is installed, capacitor loops plays a part when dropping into to suppress to shove; Simultaneously jointly form the harmonic wave loop with the capacitor group, play the filter action of each harmonic.
Because air core reactor do not have iron core, the Distribution of Magnetic Field of air core reactor on very large open domain, the leakage field field intensity, its magnetic field on around electric equipment and ground network certain impact is arranged.And this impact is along with the increase of line current, and its negative effect is also increasing, the normal operation of other equipment of severe jamming.Traditional shielding mode is because the mutual inductance between the reactor is very strong, so air core reactor is wanted the Chinese character pin-shaped placement of three-phase, so that three-phase mutual inductance balance reduces to disturb to greatest extent.In order to suppress this interference, in reactor certain space scope, install the radome of an integral body in the reactor outside additional, stray field and the external electrical equipment of reactor are kept apart, (as shown in Figure 1), air core reactor places in the radome fully, shield enclosure ground connection.In actual applications, the method can effectively reduce the reactor stray field really to the interference of electric equipment on every side, but has also occurred a comparatively serious phenomenon simultaneously, and namely radome and main earth mat band steel all seriously generate heat, and produce with the sparking phenomenon.
Because radome is still in the magnetic field of the in time alternation that reactor produces, according to the law of electromagnetic induction, radome is as conductor, cutting through the magnetic line of force, certainly lead to induced electromotive force, and it distributes different along with the distribution of the surface configuration of conductor and magnetic flux, thereby forms eddy current at cross-sectional area of conductor.Because the grounding characteristics of radome directly causes existing the conductor of potential difference current flowing to occur, the mechanism of production of Here it is fever phenomenon.The electric current that flows through reactor is larger, and the stray field that reactor forms is stronger, and fever phenomenon is also serious all the more, and is serious in the generation that causes various faults.
Simultaneously, this radome integral body covers the structure of reactor, also cause the radiating effect of reactor not good, especially when large electric current, and a comparatively serious phenomenon has appearred, i.e. all seriously heatings of radome and main earth mat band steel, and serious with the heating of sparking phenomenon generation reactor, it is not smooth to dispel the heat, and directly affects its suppression and filter effect.
Summary of the invention
The purpose of this utility model is for the defective that exists in the prior art, and a kind of cover body structure that suppresses the air core reactor electromagnetic interference is provided.The utility model comprises: radome, insulated column, air core reactor, a radome is installed at the top that it is characterized in that air core reactor, radome is installed in the top of air core reactor by insulated column, and the sidewall of radome is contained in the top of air core reactor to the downward-extension cover.
Described radome suspends by the insulated column more than two and is installed on the air core reactor, and radome is installed, and is not connected with ground wire.
Described radome is that hollow hollow shell upside-down mounting is above air core reactor.
According to the air core reactor leakage field is analyzed in the vortex field that radome produces, what vortex field density was stronger is directly over the air core reactor, the vortex field that the air core reactor side forms relatively a little less than, therefore cover the screen method of local air core reactor, can reach traditional identical shield effectiveness of shielding construction.
The utility model has the advantages that radome is not connected with ground wire, avoid on the radome producing large electric current and the phenomena of the failure such as overheated, sparking that cause.Simple in structure, saving material are conducive to the processing of structural member, good heat dissipation effect.Air core reactor does not need to seek the three-phase symmetrical balance, can place flexibly, is convenient to install, and effectively saves the space.
Description of drawings
The reactor ELECTROMAGNETIC RADIATION SHIELDING structural representation that Fig. 1 is traditional;
Fig. 2 reactor suspension of the present utility model shielding case structure schematic diagram;
Fig. 3 electro-magnetic shielding cover structural front view of the present utility model;
Fig. 4 reactor suspension of the present utility model radome implementation method schematic diagram.
Among the figure: 1 radome, 2 insulated columns, 3 air core reactors, 4 earthing bars.
Embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
Embodiment one
Present embodiment is installed a circular radome 1 above air core reactor 3, radome 1 is that the hollow cylinder upside-down mounting is above air core reactor 3.The sidewall of radome 1 is contained in hollow reactance to the downward-extension cover, 3 top, radome 1 sidewall covers part air core reactor 3, and radome 1 suspends by four insulated columns 2 and is installed on the top of air core reactor 3, and radome is installed and is not connected (referring to Fig. 3) with ground wire.Because the buffer action of insulated column 2, and radome 1 is not connected with main earth mat, and just as one independently cover body exist, only play the effect that shields the reactor leakage field.Radome under normal conditions, can be selected l apart from the distance of around the air core reactor and each position, top
1≈ l
2≈ l
3, also can do suitable adjustment and optimization (referring to Fig. 2) according to actual conditions.Radome adopts aluminum material, and the non iron permeability magnetic material mainly is to consider to select permeability magnetic material, can have influence on the reactance value of air core reactor, thereby causes reactor filtering and suppression effect not good.
Embodiment two
Identical with embodiment one, difference is that in the present embodiment air core reactor 3 is three, and wherein two radomes 1 are non-cylindrical, and two radomes 1 are according to the requirement of the installing part of having pruned.
In transmission line, usually install three hollow filter reactors additional, because the practical application spatial location is limit, the reactor symmetry can't be placed.If do not install radome additional at each reactor, leakage field of producing during work in energising of reactor so, will to around electric equipment produce strong electromagnetic interference, thereby cause whole electrical system to work.
Install radome 1 as shown in Figure 5 additional on the top of each reactor, each cover body all adopts insulated column 2 isolation, be suspended on the air core reactor 3, and each radome 1 sidewall covers part air core reactor 3, like this, because the reactor leakage field acts on the shielding cover body and forms the vortex field, there is potential difference to exist, but because the buffer action of insulated column, radome is not connected with main earth mat, can not form large circulation, thus establishment fever phenomenon and other may cause the unfavorable factor of fault, simultaneously, such version also is more conducive to heat radiation.
As can be seen from Figure 4, the three-phase hollow filter reactor puts more than complete isosceles triangle position that does not have routinely, and because the restriction of size, wherein two radomes are non-circular, be according to the installation requirement a part of circle shell of pruning, and non-circular housing do not affect effectiveness.The reactor bottom does not relate to the electric equipment that is disturbed in the present embodiment, so only on top radome is set, if have the workplace of electric equipment in the reactor top and the bottom, also can place shielding and cover in the reactor bottom, do symmetrical treatment with the same structure form and get final product.Referring to Fig. 5.
Present embodiment is applicable to the hollow filter reactor electric current in the application scenario of 200A～10000A.
Claims (3)
1. the cover body structure that suppresses the air core reactor electromagnetic interference, comprise: radome, insulated column, air core reactor, a radome is installed at the top that it is characterized in that air core reactor, radome is installed in the top of air core reactor by insulated column, and the sidewall of radome is contained in the top of air core reactor to the downward-extension cover.
2. the cover body structure of inhibition air core reactor electromagnetic interference according to claim 1 is characterized in that described radome is installed on the air core reactor by the suspension of the insulated column more than two, and radome is installed, and is not connected with ground wire.
3. the cover body structure of inhibition air core reactor electromagnetic interference according to claim 1 is characterized in that described radome is that the hollow shell upside-down mounting is above air core reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205163463U CN202796387U (en) | 2012-10-10 | 2012-10-10 | Cover structure for suppressing electromagnetic interference of air-core reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205163463U CN202796387U (en) | 2012-10-10 | 2012-10-10 | Cover structure for suppressing electromagnetic interference of air-core reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202796387U true CN202796387U (en) | 2013-03-13 |
Family
ID=47823597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205163463U Expired - Lifetime CN202796387U (en) | 2012-10-10 | 2012-10-10 | Cover structure for suppressing electromagnetic interference of air-core reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202796387U (en) |
-
2012
- 2012-10-10 CN CN2012205163463U patent/CN202796387U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |