CN112735791A - Dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission - Google Patents
Dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission Download PDFInfo
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- CN112735791A CN112735791A CN202110045189.6A CN202110045189A CN112735791A CN 112735791 A CN112735791 A CN 112735791A CN 202110045189 A CN202110045189 A CN 202110045189A CN 112735791 A CN112735791 A CN 112735791A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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Abstract
The dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission comprises a rainproof noise reduction device, a reactor body and a bottom support accessory which are sequentially arranged from top to bottom, wherein the reactor body is divided into an upper section reactor body and a lower section coil reactor body, the upper section reactor body and the lower section coil reactor body are connected through a transition lifting seat, and a special-shaped transition lifting seat is arranged at the bottom of the lower section coil reactor body. The invention has the characteristics of small occupied area, safety, reliability, strong shock resistance, high quality, energy conservation, environmental protection and convenient maintenance.
Description
Technical Field
The invention relates to the technical field of reactors, in particular to a dry-type hollow stacked bridge arm reactor for flexible direct current power transmission.
Background
The VSC-HVDC flexible direct current transmission technology has the advantages of fast and flexible power regulation capacity, no commutation failure, capability of supplying power to a passive network or a weak alternating current system, easiness in expansion into a multi-section direct current transmission system and a direct current power grid, obvious advantages in the fields of island power supply, clean energy grid connection, urban asynchronous power grid interconnection, offshore platform power supply and the like, and has been widely developed and applied in the world along with the development of flexible direct current transmission.
In a flexible direct-current transmission project, a dry type hollow bridge arm reactor is used as one of key devices, the bridge arm reactor is positioned on a bridge arm unit of a flexible direct-current converter valve and forms a converter station reactance together with leakage reactance of an alternating-current side transformer, the converter station reactance has the functions of controlling power transmission, inhibiting alternating-current side current fluctuation and inhibiting current conversion and filtering among bridge arms, and in addition, the bridge arm fault current which rises too fast in a short circuit and circular current among the bridge arms can be inhibited.
With the development of flexible direct-current power transmission, the bridge arm reactors have increased transmission capacity and higher voltage, and are limited by transportation size, and the bridge arm reactors of a single coil cannot meet the requirement of the insulation level between terminals, so that a mode of arranging two reactors in series and horizontally is needed, and the occupied area of the horizontal arrangement is large.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission, which has the characteristics of small occupied area, safety, reliability, strong shock resistance, high quality, energy conservation, environmental protection and convenience in maintenance.
In order to achieve the purpose, the invention adopts the technical scheme that:
a dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission comprises a rainproof noise reduction device 2, a reactor body 1 and a bottom supporting accessory 6 which are sequentially arranged from top to bottom, wherein the reactor body 1 is divided into an upper-section reactor body 7 and a lower-section coil reactor body 16, the upper-section reactor body 7 and the lower-section coil reactor body 16 are connected through a transition lifting seat 24, and a special-shaped transition lifting seat 30 is arranged at the bottom of the lower-section coil reactor body 16.
12 transition lifting seats 24 are respectively arranged on the inner ring and the outer ring in the middle between the upper section reactor body 7 and the lower section coil reactor body 16.
The bottom support accessory 6 comprises a post insulator 42, a silicon rubber gasket 43 is arranged at the upper end of the post insulator 42, a lower support 45 is arranged at the lower end of the post insulator 42, and the post insulators 42 are connected through a metal tie bar 44.
The bottom of the post insulator 42 is a porcelain insulator or a composite insulator and is supported in a straight mode, and a circle of insulator corona ring is arranged outside the post insulator 42.
The bottom supporting accessory 6 is arranged at the bottom of the lower reactor coil body 16, the bottom supporting accessory 6 is vertically supported by 12-column supporting insulators 42, each column support is composed of 2 sections of single-section supporting insulators with different heights, the 12-column supporting insulators are fixedly connected through metal tie bars 44, and the top ends of the supporting insulators 42 are connected with the star-shaped frame 20 of the lower reactor coil body 16 through the special-shaped transition lifting seats 30.
The upper reactor coil body 7 is wound by adopting a flat transposition aluminum stranded wire 8, the upper reactor coil body 7 is of a multi-layer cylindrical parallel structure, a sound-proof cover 9 is additionally arranged outside the upper reactor coil body, an air passage is arranged between every two layers of structures, a drawing rod 10 is adopted by the air passage as a support between wire packages, and an acrylic polyurethane enamel and RTV-II glue are coated on the outer surface of the drawing rod 10.
The two ends of the upper-section reactor coil body 7 are star-shaped frames 11, the upper end and the lower end of each star-shaped frame 11 are provided with an equalizing ring 13 and a wire inlet and outlet wiring terminal 14, and each aluminum row of the bottom star-shaped frame 10 is provided with 2 foot lug-shaped flanges 15.
The lower reactor coil body 16 is wound by adopting flat transposition aluminum stranded wires 17, the lower reactor coil body 16 is of a multi-layer cylindrical parallel structure, a sound-proof cover 18 is additionally arranged outside the lower reactor coil body, an air passage is arranged between every two layers of structures, a drawing rod 19 is used as a support between wire packages in the air passage, and acrylic polyurethane enamel and RTV-II glue are coated on the outer surface of the drawing rod 19.
The two ends of the lower reactor coil body 16 are star-shaped frames 20, the upper end and the lower end of each star-shaped frame 20 are respectively provided with a voltage-sharing ring 22 and a wire inlet and outlet wiring terminal 23, each aluminum row on the upper end face of the upper star-shaped frame 20 is provided with 2 foot lug-shaped flanges 15, and each aluminum row on the lower end face of the lower star-shaped frame 20 is provided with 2 foot lug-shaped flanges 15.
The rainproof noise reduction device 2 comprises a double-layer rainproof noise reduction device 39 positioned at the top of the upper-section reactor body 7, an upper bird-proof fence 36 arranged at the joint of the upper-section reactor body 7 and the double-layer rainproof noise reduction device 39, a middle bird-proof fence 37 between the upper-section reactor body 7 and the lower-section reactor coil body 16 and a bottom bird-proof fence 38 arranged at the bottom of the lower-section reactor coil body 16;
the upper bird fence 36 is connected between the rain-proof noise reduction device 2 and the upper reactor body 7 through an umbrella support row and a stainless steel bolt;
the middle bird-preventing fence 37 consists of a plurality of petals, and each petal of the middle bird-preventing fence is fixedly connected with the star-shaped frame of the reactor body by stainless steel bolts and angle steel to form a whole;
the bottom bird-proof fence 38 is positioned on the upper part of the lower section coil reactor body 16 star frame;
the bird-preventing fence is a resin-impregnated glass fiber grid plate with 1.5mm of thickness and grid holes, and a gap of 10-15 mm is formed between the bird-preventing fence and the reactor body.
The double-layer rain-proof noise reduction device 39 is formed by assembling four petals, the petals are fixed by fastening bolts to form a whole, the fastening bolts are connected into an equipotential 40 by equipotential lines, and a grading ring 41 is arranged on the rain-proof noise reduction device.
The double-layer rain-proof noise reduction device 39 adopts two parts of a cover umbrella and a top umbrella, and the center of the cover umbrella is provided with a hole.
The special-shaped transition lifting seat 30 comprises a whole-plate lower bottom plate 31, two small circular steel tubes 32 with the same height are welded on the whole-plate lower bottom plate 31, flanges 33 with strip-shaped holes are respectively welded on the small circular steel tubes 32, and the special-shaped transition lifting seat 30 is fixedly connected with a top flange 34 of the insulator through stainless steel bolts 35 made of special materials.
The invention has the beneficial effects that:
according to the dry-type hollow stacked bridge arm reactor, a double-coil stacked design is adopted for the first time in flexible direct-current power transmission, the product has the advantages of small floor area, no pollution, no public hazard, energy conservation and the like, the technical advantages of the dry-type hollow stacked bridge arm reactor for the flexible direct-current power transmission are increased, the market competitiveness and the occupancy rate of the product are further improved, and the product has a wide market prospect.
The invention can effectively solve the problems of high insulating level of the product terminal insulator, small creepage distance of the external insulation, ultra-wide transportation, ultra-high difficulty and the like, and the stacked design can effectively reduce the occupied area of the product and improve the utilization efficiency of the land;
the invention solves the problems that a single reactor cannot be wound, the occupied area of the flat arrangement of the reactors is large, the reactors cannot be transported and the like due to large capacity, increased voltage level and increased electrical parameters;
the invention not only ensures the end-to-ground insulation level of the stacked bridge arm reactor, but also meets the difficult problem of safe operation under high earthquake intensity;
the middle transition piece and the bottom support of the invention adopt the structural design of the special-shaped lifting seat, so that the eddy current loss of the middle transition seat and the bottom lifting seat is greatly reduced, and the heating problem is prevented;
the invention provides a method for rain prevention and noise reduction by adopting a 'wearing clothes and cap' mode, wherein a sound-proof cover is arranged outside an upper-section reactor and a lower-section reactor; the bird prevention devices are respectively additionally arranged on the upper part of the upper reactor, the stacking middle of the upper reactor and the lower reactor and the bottom of the lowest reactor; the noise reduction device well plays roles of inhibiting and blocking coil noise, enhancing the weather resistance of the coil and preventing birds;
the invention provides a uniform ring unit which comprises a voltage-sharing shielding ring and is in a plurality of arc structures, wherein the uniform ring units are arranged in the same horizontal plane, a gap is formed between every two adjacent uniform ring units, and the difference from the conventional design is that the voltage-sharing ring gaps of an upper reactor and a lower reactor are staggered. The radio interference of products is greatly reduced, the shielding and voltage-sharing effects at the gap of the voltage-sharing ring are well compensated, and the method has important significance for improving the high-voltage and extra-high voltage flexible direct-current transmission quality.
Drawings
Fig. 1 is a schematic diagram of a dry-type hollow stacked bridge arm reactor of the present invention.
Fig. 2 is a schematic structural diagram of the upper coil body according to the present invention.
Fig. 3 is a schematic structural diagram of a lower coil body according to the present invention.
Fig. 4 is a schematic structural view of the middle transition elevating seat of the present invention.
Fig. 5 is a schematic view of the connection between the middle transition elevating seat and the upper and lower coil bodies according to the present invention.
Fig. 6 is a schematic view of the bottom special-shaped transition lifting seat of the lower coil body of the invention.
Fig. 7 is a schematic structural view of the bird fence of the present invention.
Fig. 8 is a schematic structural diagram of rain-proof and noise reduction of the present invention.
Fig. 9 is a schematic view of equipotential lines on the rain hat of the present invention.
FIG. 10 is a schematic view of the bottom support structure of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples.
As shown in fig. 1: the dry-type hollow stacked bridge arm reactor for flexible direct current power transmission comprises a reactor body 1, a rainproof noise reduction device 2, an anti-bird device 3, a middle transition lifting seat 4 and a bottom supporting accessory 6 of a grading ring device 5.
As shown in fig. 2: the upper reactor coil body 7 is wound by adopting a flat transposition aluminum stranded wire 8, epoxy resin impregnated alkali-free glass fiber is wound, a multi-layer cylindrical parallel structure is formed by high-temperature curing, a sound-proof housing 9 is additionally arranged outside, noise transmission is reduced, and vertical binding and horizontal binding are carried out by adopting epoxy resin impregnated glass fiber belts for binding. The air flue supporting strip of the upper reactor coil body 7 adopts a modified unsaturated polyester resin drawing rod 10 as a support between wire packages to form a vertical heat dissipation air flue, and the outer surface of the air flue supporting strip is coated with acrylic polyurethane enamel and RTV-II glue. The two ends of the upper reactor coil body 7 are star-shaped frames 11 which are formed by welding high-strength alloy aluminum row profiles, after the welding is finished, the star-shaped frames 11 are integrally bound into a whole by a net shape 12, the upper end and the lower end of each star-shaped frame 11 are respectively provided with an equalizing ring 13, the star-shaped frames 11 are respectively connected with an incoming and outgoing line wiring terminal 14 from top to bottom, and each aluminum row of the bottom star-shaped frame 10 is provided with 2 foot lug-shaped flanges 15.
The reticular binding 12 is made by curing impregnated glass fiber and has the function that the upper star frame and the lower star frame are cured into a whole, and the overall structural strength is good;
the bottom of the lower star frame at the upper section adopts two lug-shaped flanges 15 as supports, so that the structural strength of the stacked arrangement is greatly improved;
as shown in fig. 3: lower segment reactor coil body 16 adopts flat transposition aluminum stranded conductor 17 coiling, and epoxy resin flooding alkali-free glass silk wraps up, and multilayer cylinder formula parallel structure, the high temperature curing shaping, the sound-proof housing 18 is installed additional to the outside, reduces the noise propagation, and the ligature adopts and carries out vertical ligature and level with epoxy resin flooding glass fiber area and carry out the ligature. The air flue supporting strip of the lower reactor coil body 16 adopts a modified unsaturated polyester resin drawing rod 19 as a support between wire packages to form a vertical heat dissipation air flue, and the outer surface of the air flue supporting strip is coated with acrylic polyurethane enamel paint and RTV-II glue. The two ends of the lower reactor coil body 16 are star-shaped frames 20, the star-shaped frames are formed by welding high-strength alloy aluminum row profiles, after welding, net-shaped binding 21 is carried out to form a whole, the upper end and the lower end of each star-shaped frame 20 are respectively provided with an equalizing ring 22, the star-shaped frames 20 are respectively connected with a wire inlet and outlet wiring terminal 23 up and down, each aluminum row on the upper end face of each star-shaped frame 20 at the upper part is provided with 2 foot lug-shaped flanges 15, and each aluminum row on the lower end face of each star-shaped frame 20 at the lower part is provided with 2 foot lug-shaped.
The reticular binding 12 is made by curing impregnated glass fiber and has the function that the upper star frame and the lower star frame are cured into a whole, and the overall structural strength is good;
two ear-shaped flanges 15 are respectively arranged on the upper end surface of the upper star frame and the lower end surface of the lower star frame of the lower section to be used as supports, so that the overall structural strength of the stacked bridge arm reactor is greatly improved;
as shown in fig. 4: the middle transition lifting seat 24 is formed by combining and welding an upper bottom plate 25 with a strip-shaped hole, a middle small-section round steel pipe 26 and a reinforcing rib 27 with a lower bottom plate 28 with a strip-shaped hole.
As shown in fig. 5: 12 inner and outer rings of the upper-section reactor coil body 7 and the lower-section reactor coil body 16 are respectively supported in a transition mode through a middle transition lifting seat 24, and connecting terminals between the upper-section reactor coil body and the lower-section reactor coil body are in transition connection through a transition terminal row 29;
as shown in fig. 6: the special-shaped transition lifting seat 30 comprises a whole plate lower bottom plate 31, two small circular steel tubes 32 with the same height are welded on the whole plate lower bottom plate 31, and flanges 33 with strip-shaped holes are respectively welded on the small circular steel tubes 32. The special-shaped transition lifting seat 30 is fixedly connected with the insulator top flange 34 by adopting a stainless steel bolt 35 made of special materials, and the stainless steel bolt 35 is made of 316 materials and comprises two flat gaskets of one bolt, a butterfly-shaped elastic gasket and two nuts.
The upper and lower coil bodies adopt the same transposed conductor equidirectional winding structure and have the interchange function.
The coil of the reactor body 1 is formed by stranding 2-3 strands of wires into 1 transposed wire for winding, so that the operation is convenient, and the winding process is accurately controlled. Because the tension of a plurality of parallel winding wires does not need to be adjusted when the transposed conductor is stranded into a transposed conductor for operation, the winding wiring state, the winding perimeter, the winding height and the like can be well controlled without an additional wire pressing device in the winding process, the control accuracy is favorable for ensuring the conformity with the design, the current distribution of the coil is balanced, and the reliability of the turn-to-turn insulation of the coil is greatly improved.
The upper and lower bottom plates of the middle transition lifting seat are designed into long strip holes, so that the assembly of the upper and lower coil bodies is facilitated;
the thickness of the material of the middle transition rising seat is as thin as possible on the basis of ensuring the mechanical strength, so that the eddy current loss of the middle transition seat is reduced, and the temperature rise is reduced.
The middle transition lifting seat and the connecting bolt are made of stainless steel materials.
The distance between the upper and lower section coil bodies needs to be supported by a stainless steel transition lifting seat with a certain height, so that the influence of mutual inductance on current distribution is reduced, the ventilation quantity of a heat dissipation channel can be increased, and the whole temperature rise of the coil is controlled.
The bridge arm reactor adopts an upper-lower segment stacking mode, and the upper segment coil and the lower segment coil are stacked to be heavy in total weight, so that the upper segment coil and the lower segment coil are supported by 12 transition lifting seats respectively arranged on an inner ring and an outer ring, vibration of the upper segment coil and the lower segment coil during operation can be greatly reduced, and noise is well controlled.
The upper section of coil product and the lower section of coil product are stacked, the bottom lifting seat adopts a special-shaped lifting seat structural design, the special-shaped lifting seat is in a concave structure, so that the magnetic force line can be reduced to penetrate through the special-shaped lifting seat to generate heat, the bottom edge of the special-shaped lifting seat is designed into a whole plate, and the overall mechanical strength of the stacked bridge arm reactor is greatly improved.
The bottom special-shaped transition lifting seat 30 is made of 304 stainless steel materials, eddy current loss generated on the special-shaped transition lifting seat 30 is small due to the low magnetic permeability of the stainless steel materials, and therefore the heating phenomenon of metal parts is avoided.
The lower wiring terminal of the upper-section reactor body 7 and the upper wiring terminal of the lower-section coil reactor body 16 are in transition connection through the transition wiring terminal row, and the electrical performance of the upper-section coil and the lower-section coil is well guaranteed.
The upper star frame, the lower star frame and the connecting terminal row of the reactor are made of special 6061T6 aluminum alloy materials which are high in mechanical strength and good in conductivity.
As shown in fig. 7: upper bird barrier 36, middle bird barrier 37 and bottom bird barrier 38, respectively.
The upper bird fence 36 is connected between the rain-proof noise reduction device 2 and the upper reactor body 7 through an umbrella support row and a stainless steel bolt, and the outer diameter of the upper bird fence 36 is basically the same as the diameter of the outer sound-proof housing of the upper reactor body 7.
The middle bird-preventing fence 37 is composed of a plurality of petals, each petal of the middle bird-preventing fence is fixedly connected with the star-shaped frame of the reactor body through stainless steel bolts and angle steel to form a whole, the structure can ensure that air smoothly passes through the middle bird-preventing fence and the star-shaped frame of the reactor body, the heat dissipation requirement of the reactor is met, and small animals such as birds can enter the air passage of the reactor.
The bottom bird-proof fence 38 is positioned on the upper part of the lower section coil reactor body 16 star frame, and the structure can ensure that air smoothly passes through the bird-proof fence, so that the heat dissipation requirement of the reactor is met, and small animals such as birds can enter the air passage of the reactor.
The bird fence with each structure type has interchangeability and is convenient for field installation.
The bird-preventing fence adopts a resin-impregnated glass fiber grid plate with 1.5mm thickness and grid holes, and the material has high heat-resistant grade, certain hardness and toughness and can well meet the requirements of installation and use.
When the anti-bird fence is designed, a gap of 10-15 mm is required to be formed between the anti-bird fence and the reactor body, and abnormal sound caused by vibration of the anti-bird fence and the reactor body is prevented.
As shown in fig. 8: through set up double-deck rain-proof device 39 of making an uproar that falls in the top of last section reactor body 7, can effectually avoid the rainwater to drench coil encapsulated layer and wind channel in from coil upper portion, have ventilation cooling's effect simultaneously.
As shown in fig. 9: double-deck rain-proof device of making an uproar 39 falls is formed by four lamella equipment, forms one whole through fastening bolt is fixed between each lamella, connect into equipotential 40 through the equipotential line between the fastening bolt, and be provided with equalizer ring 41 on the rain-proof device of making an uproar that falls, the electric field that this equalizer ring 41 structure can even protection casing position plays the effect that the corona appears in the operation in-process of shielding most advanced discharge and preventing the reactor.
The grading ring 41 and the equipotential line 40 are made of aluminum alloy materials.
The double-layer rain-proof noise reduction device 39 adopts two parts of a cover umbrella and a top umbrella, the central opening of the cover umbrella is favorable for air circulation, the heat is prevented from accumulating on the upper part of the reactor to cause overhigh local temperature rise, the diameter of the top umbrella is increased, and rainwater is prevented from pouring onto the reactor from the central hole of the cover umbrella to be encapsulated.
As shown in fig. 10: the bottom supporting structure adopts a straight type support of 12 post insulators 42, each post support is respectively composed of 2 single-section post insulators 42 with different heights, and metal lacing wires 43 are used between the 12 post insulators 42 to connect and fix each insulating post. The top end of the post insulator 42 is in transition connection with the lower star frame of the reactor coil through the special-shaped transition lifting seat 30, the silicon rubber gasket 43, the metal tie bar 44 and the lower support 45, and the support structure is good in design and stability and strong in shock resistance.
The bottom of each post insulator 42 is a porcelain insulator or a composite insulator. A straight support is adopted.
The metal lacing wire 44 is formed by welding section aluminum alloy, a circular ring is not easily formed in the middle of the lacing wire, the cross section area of the middle of the lacing wire is small, the magnetic flux passing through the middle of the lacing wire can be reduced, the eddy current loss of the lacing wire is further reduced, and the heating of the lacing wire is further reduced.
The bottom transition special-shaped lifting seat 30 and the top flange of the post insulator 42 are provided with silicon rubber pads 43, and the bolts are fixedly connected by adopting stainless steel bolts 316 which are composed of a bolt, a nut, two flat pads and an elastic pad.
A circle of insulator corona ring is arranged outside the post insulator 42, so that the electric field intensity at the flange at the top of the post insulator 42 and the transition seat can be effectively equalized, and the discharging phenomenon under the high-voltage condition is prevented.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission is characterized by comprising a rainproof noise reduction device (2), a reactor body (1) and a bottom support accessory (6), wherein the rainproof noise reduction device, the reactor body (1) and the bottom support accessory are sequentially arranged from top to bottom, the reactor body (1) is divided into an upper-section reactor body (7) and a lower-section coil reactor body (16), the upper-section reactor body (7) and the lower-section coil reactor body (16) are connected through a transition lifting seat (24), and a special-shaped transition lifting seat (30) is arranged at the bottom of the lower-section coil reactor body (16).
2. The dry-type hollow stacked bridge arm reactor for flexible direct current transmission according to claim 1, wherein the bottom support fitting (6) comprises a post insulator (42), a silicon rubber gasket (43) is arranged at the upper end of the post insulator (42), a lower support (45) is arranged at the lower end of the post insulator, and the post insulators (42) are connected through a metal tie bar (44);
the bottom of the post insulator (42) adopts a porcelain insulator or a composite insulator and adopts a straight support, and a ring of insulator corona ring is arranged outside the post insulator (42).
3. The dry-type hollow stacked bridge arm reactor for flexible direct current transmission according to claim 1, wherein the bottom support fitting (6) is disposed at the bottom of the lower reactor coil body (16), the bottom support fitting (6) is vertically supported by 12-column post insulators (42), each post support is composed of 2 single-section post insulators with different heights, the 12-column post insulators (42) are connected and fixed by using metal tie bars (44), and the top ends of the post insulators (42) are connected with the star frame (20) of the lower reactor coil body (16) through the special-shaped transition lifting seats (30).
4. The dry-type hollow stacked bridge arm reactor for flexible direct current transmission according to claim 1, characterized in that the upper reactor coil body (7) is wound by flat transposed aluminum stranded wires (8), a multi-layer cylindrical parallel structure is adopted, a sound insulation cover (9) is additionally arranged outside the upper reactor coil body, an air passage is arranged between each layer of structure, a drawing rod (10) is adopted as a support between wire packages in the air passage, and an acrylic polyurethane enamel and RTV-II glue are coated on the outer surface of the drawing rod (10);
the upper segment reactor coil body (7) both ends are star frame (11), and equalizer ring (13) and business turn over line binding post (14) are all prepared to star frame (11) upper and lower tip, join in marriage 2 footing ear shape flanges (15) on every aluminium row of bottom star frame (10).
5. The dry-type hollow stacked bridge arm reactor for flexible direct current transmission according to claim 1, characterized in that the lower reactor coil body (16) is wound by flat transposed aluminum stranded wires (17), a multi-layer cylindrical parallel structure is adopted, a sound insulation cover (18) is additionally arranged outside the lower reactor coil body, an air passage is arranged between each layer of structure, a drawing rod (19) is adopted as a support between wire packages in the air passage, and an acrylic polyurethane enamel and RTV-II glue are coated on the outer surface of the drawing rod (19);
lower segment reactor coil body (16) both ends are star frame (20), and equalizer ring (22) and business turn over line binding post (23) are all prepared to star frame (20) upper and lower tip, join in marriage 2 footing ear shape flanges (15) on every aluminium row of the up end of upper portion star frame (20), join in marriage 2 footing ear shape flanges (15) on every aluminium row of lower terminal surface of lower part star frame (20).
6. The dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission according to claim 1, wherein the rain-proof noise reduction device (2) comprises a double-layer rain-proof noise reduction device (39) positioned at the top of the upper reactor body (7), an upper bird-proof fence (36) positioned at the joint of the upper reactor body (7) and the double-layer rain-proof noise reduction device (39), a middle bird-proof fence (37) between the upper reactor body (7) and the lower reactor coil body (16), and a bottom bird-proof fence 38 positioned at the bottom of the lower reactor coil body (16).
7. The dry-type hollow stacked bridge arm reactor for flexible direct current transmission according to claim 6, characterized in that the upper bird fence (36) is connected between the rain-proof noise reduction device (2) and the upper reactor body (7) through an umbrella support row and stainless steel bolts;
the middle bird-preventing fence (37) consists of a plurality of petals, and each petal of the middle bird-preventing fence is fixedly connected with the star-shaped frame of the reactor body by stainless steel bolts and angle steel to form a whole;
the bottom bird-proof fence (38) is positioned on the upper part of the star frame of the lower section coil reactor body (16);
the bird-preventing fence is a resin-impregnated glass fiber grid plate with 1.5mm of thickness and grid holes, and a gap of 10-15 mm is formed between the bird-preventing fence and the reactor body.
8. The dry-type hollow stacked bridge arm reactor for flexible direct current transmission according to claim 6, wherein the double-layer rain-proof noise reduction device (39) is assembled by four lobes, each lobe is fixed by a fastening bolt to form a whole, the fastening bolts are connected by equipotential lines to form an equipotential (40), and the rain-proof noise reduction device is provided with a grading ring (41);
the double-layer rain-proof noise reduction device (39) adopts two parts of a cover umbrella and a top umbrella, and the center of the cover umbrella is provided with a hole.
9. The dry-type hollow stacked bridge arm reactor for flexible direct-current transmission according to claim 1, wherein the special-shaped transition lifting seat (30) comprises a whole-plate lower bottom plate (31), two small circular steel tubes (32) with the same height are welded on the whole-plate lower bottom plate (31), flanges (33) with strip-shaped holes are respectively welded on the small circular steel tubes (32), and the special-shaped transition lifting seat (30) is fixedly connected with the insulator top flange (34) through stainless steel bolts (35) made of special materials.
10. The dry-type hollow stacked bridge arm reactor for flexible direct-current transmission according to claim 1, characterized in that 12 transition elevated seats (24) are respectively installed on the inner and outer rings in the middle between the upper-stage reactor body (7) and the lower-stage coil reactor body (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045189.6A CN112735791A (en) | 2021-01-13 | 2021-01-13 | Dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045189.6A CN112735791A (en) | 2021-01-13 | 2021-01-13 | Dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission |
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| Publication Number | Publication Date |
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| CN112735791A true CN112735791A (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110045189.6A Pending CN112735791A (en) | 2021-01-13 | 2021-01-13 | Dry-type hollow stacked bridge arm reactor for flexible direct-current power transmission |
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| Country | Link |
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2021
- 2021-01-13 CN CN202110045189.6A patent/CN112735791A/en active Pending
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