CN108493783B - Corner-group converter transformer valve side connection outlet structure - Google Patents
Corner-group converter transformer valve side connection outlet structure Download PDFInfo
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- CN108493783B CN108493783B CN201810347413.5A CN201810347413A CN108493783B CN 108493783 B CN108493783 B CN 108493783B CN 201810347413 A CN201810347413 A CN 201810347413A CN 108493783 B CN108493783 B CN 108493783B
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- 239000012212 insulator Substances 0.000 claims abstract description 56
- 238000009434 installation Methods 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 description 29
- 230000005684 electric field Effects 0.000 description 9
- 239000004020 conductor Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000000819 phase cycle Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- Engineering & Computer Science (AREA)
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- Transformers For Measuring Instruments (AREA)
Abstract
The invention provides an angular group converter transformer valve side connection outlet structure which comprises a valve side post insulator (6), a first pipe bus conductive clamp (32), a fifth pipe bus clamp (40), a jumper pipe bus (7) and a mounting and fixing clamp thereof, wherein the valve side post insulator (6) and the jumper pipe bus (7) mounting and fixing clamp form fixed connection, and the jumper pipe bus (7) mounting and fixing clamp is connected with the fifth pipe bus clamp (40); a first pipe bus conductive clamp (32) is fixedly arranged on the jumper bus (7), and conductive connection is formed between the first pipe bus conductive clamp (32) and a fifth pipe bus clamp (40) through a conductive connecting piece (33). The invention can effectively solve the problem that the electrical distance between the bus-phase angle short-circuit down-lead of the suspending pipe at the most edge and the up-lead of the line from the side phase to the converter valve tower is not easy to control, improves the safety and reliability of the side line of the converter valve of the angular group of the converter station, and has the outstanding advantages of attractive appearance, convenient implementation and the like.
Description
Technical Field
The invention relates to the field of design of a converter transformer valve side connection outlet structure, in particular to an angular group converter transformer valve side connection outlet structure.
Background
In a + -800 kV extra-high voltage converter station, a wiring mode of connecting two groups of twelve-pulse converter valve towers in series is generally adopted, and each group of twelve-pulse valve assemblies is arranged in a valve hall. A. The valve side sleeve of B, C three-phase converter transformer (abbreviated as 'converter transformer', the same applies below) is directly inserted into the valve hall, and is connected to the connecting terminals of A, B, C three-phase converter valve towers corresponding to each other in phase sequence through pipe bus bars. The one-to-one connection mode of the phase sequences is simple to operate, but in order to ensure the triggering sequence of the converter valve tower, logic control time sequences in the valve control protection system software need to be changed for the valve control protection system of the converter valve tower, so that certain potential safety hazards are brought to safe operation of the converter valve tower, and the operation reliability of the converter valve tower is reduced.
For an extra-high voltage converter station in a conventional low-seismic-intensity area, due to small horizontal acceleration of an earthquake, the corresponding swing range of the converter valve tower under the earthquake working condition is small, and the connection radian of the connecting flexible wire of the suspension insulator can offset the earthquake displacement between the connection terminal of the converter valve tower and the valve side sleeve of the converter transformer. However, for an extra-high voltage converter station in a region with high earthquake intensity, such as an area with earthquake intensity not lower than 8 degrees, the displacement of the converter valve under the earthquake working condition is larger due to the high earthquake intensity of the station site. For example, through actual simulation analysis and calculation, for an 800kV extra-high voltage converter station in a high seismic intensity area, the seismic swing amplitude at the wiring terminal of a high-end 800kV converter valve can reach 1.5m. Obviously, the wiring radian of the flexible wires connected by the conventional suspension insulator cannot meet the anti-seismic requirement of the converter valve in areas with high seismic intensity. Meanwhile, since the body weight of the 800kV converter valve tower is 4-5t, if a conventional connection mode of suspending an insulator to connect flexible wires is adopted, the flexible wire margin connected with the suspending insulator limits the seismic displacement of the converter valve tower, so that the seismic stress of the converter valve tower can directly pull the valve side sleeve of the converter transformer through the connecting flexible wires, and the connection terminal of the valve side sleeve of the converter transformer can be damaged.
In addition, in the conventional design scheme of the outlet structure of the converter transformer valve side of the extra-high voltage converter station, A, B, C three-phase converter transformer is connected to the insulator at the bottom of the suspension tube bus through six-split flexible wires, the lead wires of the six-split flexible wires are longer, the electrical distance between the down lead short-circuited at the side of the suspension tube bus and the lead wire from the side phase to the outlet of the converter valve tower is not easy to control, and the swing of the suspension tube bus (especially under the earthquake working condition) can cause the adjacent six-split flexible wires to collide with each other, so that the safety and reliability of the outlet of the converter transformer valve side connection are affected.
Disclosure of Invention
The invention aims to solve the technical problems that: aiming at the problems in the prior art, the side connection outgoing line structure of the angular group converter transformer valve is provided, and the safety and reliability of the side connection outgoing line of the converter transformer valve are improved.
The technical problems to be solved by the invention are realized by adopting the following technical scheme: the valve side pillar insulator is fixedly connected with the jumper tube female installation fixing clamp, and the jumper tube female installation fixing clamp is connected with the fifth tube bus clamp; and a first pipe bus conductive clamp is fixedly arranged on the jumper bus, and conductive connection is formed between the first pipe bus conductive clamp and the fifth pipe bus clamp through a conductive connecting piece.
Preferably, the jumper tube female mounting and fixing clamp comprises a tube female fixing plate, a fixing end plate and two opposite penetrating bolts, wherein the two opposite penetrating bolts penetrate through the two opposite tube female fixing plates, and the jumper tube female is fastened and fixed through the clamp of the tube female fixing plate.
Preferably, the top end of the valve side post insulator is fixedly connected with the first insulator flange, the fixed end plate is fixedly connected with the first installation seat, and a detachable fixed connection structure is formed between the first insulator flange and the first installation base through a connecting bolt.
Preferably, the first mounting seat is connected with a pressure equalizing ball support, the pressure equalizing ball support is connected with a pressure equalizing ball, and the pressure equalizing ball is coated with the first tubular busbar conductive clamp and the conductive connecting piece.
Preferably, the pipe nut fixing plate is provided with a circular arc groove matched with the outer diameter of the jumper pipe nut.
Preferably, the jumper tube female installation fixing clamp is fixedly connected with the support frame, a universal joint is installed at the end part of the support frame, and the universal joint is connected with the fifth tube bus clamp through a bolt.
Preferably, the first pipe female conductive clamp is arranged at two opposite ends of the jumper pipe female mounting fixing clamp.
Preferably, the conductive connecting piece is a conductive telescopic copper bar.
Compared with the prior art, the invention has the beneficial effects that: in the converter transformer valve side outlet structure, the converter transformer is not connected to the bottom insulator of the suspension tube bus through the six-split flexible conductor, so that the problem that the electrical distance between the leading-down line of the phase angle short circuit of the most-side suspension tube bus and the leading-up line of the side phase to the converter valve tower outlet is not easy to control can be effectively solved, the problems that the adjacent six-split flexible conductors collide with each other due to the fact that the leading line of the six-split flexible conductor is long and the suspension tube bus swings (particularly under the earthquake working condition) are effectively avoided, the safety and the reliability of the converter transformer valve side outlet of the converter transformer station angular group are improved, the appearance is attractive, and the implementation is convenient.
Drawings
Fig. 1 is a plan layout view of a connection structure between a converter transformer and a converter valve tower.
Fig. 2 is a top view of the connection structure between the converter transformer and the converter valve tower.
Fig. 3 is a side view of a connection structure between a converter transformer and a converter valve tower.
Fig. 4 is a schematic structural view of the upper revolute joint hardware.
Fig. 5 is a schematic structural view of the lower revolute joint hardware.
Fig. 6 is a partial enlarged view at D in fig. 2.
Fig. 7 is a view in the F-F direction in fig. 6.
Fig. 8 is a partial enlarged view at E in fig. 2.
Fig. 9 is an H-H view of fig. 8.
Fig. 10 is a partial enlarged view at K in fig. 2.
Fig. 11 is a P-P view of fig. 10.
Item label name in figure: 1-converter transformer, 1A-A converter transformer, 1B-B converter transformer, 1C-C converter transformer, 2-upper valve side bushing, 3-lower valve side bushing, 4-flexible wire, 5-first suspension insulator, 6-valve side post insulator, 6A-A valve side post insulator, 6B-B valve side post insulator, 6C-C valve side post insulator, 7-jumper tube, 8-suspension tube, 9-first tube, 10-revolute joint fitting, 11-second tube, 12-converter valve tower, 12A-A converter valve tower, 12B-B converter valve tower, 12C-C converter valve tower, 13-third tube, 14-suspension frame, 15-second suspension insulator, 16-fourth tube, 17-tube bus fixing hardware fitting, 18-first tube bus clamps, 19-ball head mounting seats, 20-pressure equalizing ball brackets, 21-connection lugs, 22-pressure equalizing balls, 23-first connecting rods, 24-second tube bus clamps, 25-second connecting rods, 26-third connecting rods, 27-fourth connecting rods, 28-third tube bus clamps, 29-fifth connecting rods, 30-fourth tube bus clamps, 31-sixth connecting rods, 32-first tube bus clamps, 33-conductive connecting pieces, 34-fixing end plates, 35-tube bus fixing plates, 36-first mounting seats, 37-first insulating flange plates, 38-opposite-penetrating bolts, 39-universal joints, 40-fifth tube bus clamps, 41-supporting frames, 42-first wire clamp, 43-conductive connecting plate, 44-second installation base, 45-second insulator flange, 46-support piece, 47-second wire clamp, 48-sixth pipe bus clamp, 49-conductive core rod, 50-pre-bent wire, 51-second pipe bus conductive clamp, 52-pipe bus end cover, 53-sleeve terminal clamp, 54-valve side sleeve equalizing cover, 55-fastening bolt, 101-upper rotary joint hardware and 102-lower rotary joint hardware.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The connecting structure between the converter transformer and the converter valve tower of the converter station shown in fig. 1, 2 and 3 mainly comprises a converter transformer 1, a jumper tube bus 7, a suspension tube bus 8 and a converter valve tower 12, wherein the converter transformer 1 comprises A, B, C three phases, namely a phase converter transformer 1A, B phase converter transformer 1B and a phase converter transformer 1C which are respectively and correspondingly marked as a phase converter transformer 1B and a phase converter transformer 1C, and the phase converter transformer 1C is defined as a side phase converter transformer. The converter valve column 12 also includes A, B, C three phases, labeled a-phase converter valve column 12A, B, and C-phase converter valve column 12B and 12C, respectively. The suspension pipe nut 8 is connected with the suspension bracket 14 through the first suspension insulator 5, and the A-phase converter valve tower 12A, B and the A-phase converter valve tower 12B, C are respectively connected with the suspension bracket 14.
The conductive connection is formed between the conductive core rod inside the upper valve side sleeve 2 in the phase A converter transformer 1A and the conductive core rod inside the lower valve side sleeve 3 in the phase B converter transformer 1B through the jumper nut 7, and the conductive connection is also formed between the conductive core rod inside the upper valve side sleeve 2 in the phase B converter transformer 1B and the conductive core rod inside the lower valve side sleeve 3 in the phase C converter transformer 1C through the jumper nut 7. The conductive core rod in the lower valve side sleeve 3 in the phase A converter transformer 1A is in conductive connection with the suspension pipe nut 8 through the flexible wire 4, and the conductive core rod in the upper valve side sleeve 2 in the phase C converter transformer 1C is also in conductive connection with the suspension pipe nut 8 through the flexible wire 4. The jumper pipe 7 connected between the B-phase converter transformer 1B and the C-phase converter transformer 1C is electrically connected with the wiring terminal in the middle of the B-phase converter valve tower 12B, the jumper pipe 7 connected between the B-phase converter transformer 1B and the A-phase converter transformer 1A is electrically connected with the wiring terminal in the middle of the A-phase converter valve tower 12A, the conductive core rod in the lower valve side sleeve 3 in the A-phase converter transformer 1A is electrically connected with the wiring terminal in the middle of the C-phase converter valve tower 12C, and the wiring terminal at the bottom of the converter valve tower 12 is electrically connected with the wiring terminal through the third pipe nut 13.
After the connecting structure is adopted, corresponding conductive connection can be formed between the A-phase converter transformer 1A and the A-phase converter valve tower 12A, corresponding conductive connection is formed between the B-phase converter transformer 1B and the B-phase converter valve tower 12B, and corresponding conductive connection is formed between the C-phase converter transformer 1C and the C-phase converter valve tower 12C, and the wiring mode that the arrangement phase sequence of the converter transformer 1 and the arrangement phase sequence of the converter valve tower 12 are not in one-to-one correspondence, but the actual electric connection phase sequence is in one-to-one correspondence is not needed, so that the triggering sequence of the converter valve tower 12 can be ensured without changing the logic control time sequence in the valve control protection system of the converter valve tower 12, the operation is simple, and the safety and reliability of the operation of the converter valve tower 12 are improved.
Considering that the dead weight of the jumper nut 7 has a larger influence on the terminal of the valve side sleeve of the converter transformer under the earthquake working condition, in order to reduce the stress of the terminal of the valve side sleeve of the converter transformer, valve side post insulators 6 can be respectively arranged between the A-phase converter transformer 1A and the B-phase converter transformer 1B and between the C-phase converter transformer 1C and the B-phase converter transformer 1B, and the jumper nut 7 is supported through the valve side post insulators 6. In addition, in order to facilitate the conductive connection between the conductive core rod inside the lower valve side sleeve 3 and the suspension pipe nut 8 in the a-phase converter 1A, the valve side post insulators 6 may be provided on the a-phase converter 1A valve side, in view of that the conductive connection is usually made by the pipe nut between the connection terminal in the middle of the converter valve tower 12 and the converter 1, whereby 3 valve side post insulators 6 need to be provided. For convenience of description, the order of these 3 valve-side column insulators 6 is labeled as coincidence with the phase order of the converter valve tower 12, and is labeled as a-phase valve-side column insulator 6A, B-phase valve-side column insulator 6B, C-phase valve-side column insulator 6C, respectively. The top of the valve side post insulator 6 can be fixed with a connecting pipe female fixing fitting 17, and the pipe female fixing fitting 17 is supported by the valve side post insulator 6, so that wiring operation can be facilitated, and wiring operation efficiency is improved. For example, as shown in fig. 1, the conductive core rod inside the lower valve side sleeve 3 in the a-phase converter transformer 1A may form conductive connection with the female fixing fitting 17 on the top of the C-phase valve side post insulator 6C through the flexible wire 4, and may also form conductive connection with the suspended female 8 through the flexible wire 4 between the female fixing fitting 17 on the top of the C-phase valve side post insulator 6C.
Since the conductive connection structure formed by the pipe nut is a hard connection structure, its shock resistance is poor. In order to enhance the shock resistance of the converter valve tower 12, a rotary connection structure between the converter transformer and the converter valve as shown in fig. 1,2 and 3 may be adopted, and a rotary joint fitting 10 and a second suspension insulator 15 are additionally arranged between at least one phase converter transformer 1 and the converter valve tower 12 which is correspondingly and conductively connected. Generally, an independent rotary joint fitting 10 and a second suspension insulator 15 are respectively provided between each of the 3-phase converter transformers 1 and its corresponding converter valve tower 12, that is, an independent rotary joint fitting 10 and a second suspension insulator 15 are respectively provided between the a-phase converter transformer 1A and the C-phase converter valve tower 12C, between the B-phase converter transformer 1B and the a-phase converter valve tower 12A, and between the C-phase converter transformer 1C and the B-phase converter valve tower 12B. The rotary joint hardware fitting 10 comprises an upper rotary joint hardware fitting 101 and a lower rotary joint hardware fitting 102, wherein a movable connection structure capable of relatively rotating is formed between the upper rotary joint hardware fitting 101 and the lower rotary joint hardware fitting 102. The A phase converter transformer 1A and the corresponding lower rotary joint hardware fitting 102, the upper rotary joint hardware fitting 101 and the C phase converter valve tower 12C are sequentially connected in a conductive manner, the B phase converter transformer 1B and the corresponding lower rotary joint hardware fitting 102, the upper rotary joint hardware fitting 101 and the A phase converter valve tower 12A are sequentially connected in a conductive manner, and the C phase converter transformer 1C and the corresponding lower rotary joint hardware fitting 102, the upper rotary joint hardware fitting 101 and the B phase converter valve tower 12B are sequentially connected in a conductive manner.
The upper rotating joint fitting 101 preferably adopts a structure as shown in fig. 4, and mainly comprises a first connecting rod 23, a second connecting rod 25 and a third connecting rod 26, wherein the first connecting rod 23 and the second connecting rod 25 and the third connecting rod 26 respectively form a movable connecting structure capable of rotating relatively. Specifically, one end of the first connecting rod 23 is connected with the ball mounting seat 19, one end of the third connecting rod 26 forms a rotating ball, and a ball hinge structure which rotates relatively is formed between the ball mounting seat 19 and the rotating ball on the third connecting rod 26. One end of the second connecting rod 25 forms a U-shaped joint, and a hinge structure which rotates relatively is formed between the U-shaped joint and the first connecting rod 23 through a pin shaft; or the middle part of the first connecting rod 23 is connected with the ball mounting seat 19, one end of the second connecting rod 25 forms a rotating ball, and a ball hinge structure which rotates relatively is formed between the rotating ball and the ball mounting seat 19.
In order to facilitate the mechanical connection between the upper revolute joint fitting 101 and the second suspension insulator 15, a first connecting rod 23 thereof may be connected to a connecting lug 21, the connecting lug 21 being connected to the second suspension insulator 15. In order to facilitate the external electrical connection of the upper revolute joint hardware fitting 101, the second connecting rod 25 is connected with the second pipe bus clamp 24, the third connecting rod 26 is connected with the first pipe bus clamp 18, and the first pipe bus clamp 18 and the second pipe bus clamp 24 are electrically connected through the flexible wires 4; preferably, the flexible conductor 4 is provided with a pre-arch structure.
The lower rotating joint fitting 102 preferably adopts a structure as shown in fig. 5, and mainly comprises a fourth connecting rod 27, a fifth connecting rod 29 and a sixth connecting rod 31, wherein a movable connecting structure capable of relatively rotating is formed between the fourth connecting rod 27 and the fifth connecting rod 29. Further, one end of the fourth connecting rod 27 is connected with the ball mounting seat 19, one end of the fifth connecting rod 29 forms a rotating ball, and a ball hinge structure which rotates relatively is formed between the rotating ball and the ball mounting seat 19. Or one end of the fourth connecting rod 27 forms a U-shaped joint, and the U-shaped joint and one end of the fifth connecting rod 29 form a hinge structure which rotates relatively through a pin shaft. The fifth connecting rod 29 is connected with the sixth connecting rod 31; preferably, the fifth connecting rod 29 and the sixth connecting rod 31 are fixedly connected and form an L-shaped structure.
In order to facilitate the external electrical connection of the lower revolute joint fitting 102, the fourth connecting rod 27 is connected with the third pipe bus-bar clamp 28, the sixth connecting rod 31 is connected with the fourth pipe bus-bar clamp 30, and the third pipe bus-bar clamp 28 and the fourth pipe bus-bar clamp 30 are electrically connected through the flexible wires 4; preferably, the flexible conductor 4 is provided with a pre-arch structure.
Between the converter transformer 1 and the corresponding rotary joint fitting 10, the second suspension insulator 15 and the converter valve tower 12, one end of the second suspension insulator 15 is connected with the suspension bracket 14, and the other end is connected with the connection hanging lug 21 on the upper rotary joint fitting 101. The wiring terminal in the middle of the converter valve tower 12 is electrically connected with the second pipe bus-bar 24 in the upper rotary joint fitting 101 through the second pipe bus-bar 11, the first pipe bus-bar 18 in the upper rotary joint fitting 101 is electrically connected with the third pipe bus-bar 28 in the lower rotary joint fitting 102 through the fourth pipe bus-bar 16, the fourth pipe bus-bar 30 in the lower rotary joint fitting 102 is connected with the pipe bus-bar fixing fitting 17 through the first pipe bus-bar 9, the pipe bus-bar fixing fitting 17 is supported through the valve side post insulator 6, and the wiring terminal in the bottom of the converter valve tower 12 is electrically connected with the third pipe bus-bar 13.
In order to prevent corona discharge caused by non-uniformity of an electric field at the positions of the upper and lower revolute joint fittings 101 and 102, the first connection rod 23 in the upper revolute joint fitting 101 may be connected to the pressure equalizing ball bracket 20, and the pressure equalizing ball bracket 20 is connected to the pressure equalizing ball 22, as shown in fig. 4. Similarly, the fourth connecting rod 27 in the lower revolute joint fitting 102 is connected to the pressure equalizing ball support 20, and the pressure equalizing ball support 20 is connected to the pressure equalizing ball 22, as shown in fig. 5. By providing the equalizing balls 22, the electric field can be uniform, and corona discharge caused by non-uniformity of the electric field can be effectively prevented.
By adopting the upper rotary joint fitting 101 and the lower rotary joint fitting 102, and the movable connection structure of relative rotation is formed between the upper rotary joint fitting 101 and the lower rotary joint fitting 102, under the earthquake working condition, earthquake swinging of the converter valve tower 12 in different directions is converted into rotation of the upper rotary joint fitting 101 and the lower rotary joint fitting 102 in the vertical direction and the horizontal direction, and the earthquake displacement amplitude is within the allowable rotation range of the upper rotary joint fitting 101 and the lower rotary joint fitting 102, so that the earthquake displacement of the converter valve tower 12 can be lightened or even offset, the stress of a valve tower wiring terminal of the converter valve tower 12 and a valve side sleeve of the converter 1 is ensured to be within the allowable range, the problem of safe and reliable electric connection of overlarge earthquake swing of electric equipment such as the converter valve tower 12 and the converter 1 in a high earthquake intensity area is effectively solved, and the earthquake resistance of the electric equipment such as the converter valve tower 12 and the converter 1 is effectively improved.
In order to improve the safety and reliability of the valve side connection outgoing line of the converter transformer 1, the valve side connection outgoing line structure of the converter transformer 1 can be constructed as follows:
As shown in fig. 2, 6 and 7, the corner-group converter transformer valve side connection outlet structure comprises a valve side post insulator 6, a jumper tube nut 7, a mounting and fixing clamp thereof, a first tube nut conductive clamp 32, a first mounting base 36 and a fifth tube nut clamp 40, wherein the mounting and fixing clamp of the jumper tube nut 7 comprises a tube nut fixing plate 35, a fixing end plate 34 and a butt bolt 38. The top end of the valve side post insulator 6 is fixedly connected with a first insulator flange 37, and a detachable fixed connection structure is formed between the first insulator flange 37 and the first mounting base 36 through a connecting bolt. The jumper tube 7 is fixedly connected with the first mounting seat 36 by a tube female fixing plate 35 and a fixing end plate 34.
Specifically, two opposite pipe nut fixing plates 35 may be provided, and a circular arc groove matched with the outer diameter of the jumper pipe nut 7 is preferably provided on each pipe nut fixing plate 35; the two pipe bus fixing plates 35 are oppositely and vertically clamped to the jumper bus 7, and then the opposite two pipe bus fixing plates 35 are penetrated by opposite penetrating bolts 38, so that the jumper bus 7 can be clamped and fixed by the pipe bus fixing plates 35; the fixed end plate 34 is fixedly connected to the female pipe fixing plate 35 and the first mounting seat 36, respectively, so that the jumper female 7 can be fixedly mounted to the top end of the valve side post insulator 6.
In actual installation operation, the fixed end plate 34 and the first installation seat 36 may be fixedly connected, then one of the pipe nut fixing plates 35 and the fixed end plate 34 are fixedly connected, and the jumper nut 7 is installed on the fixed pipe nut fixing plate 35; then, the other pipe nut fixing plate 35 is pressed against the jumper nut 7, and the jumper nut 7 is fixedly attached to the tip end of the valve side post insulator 6 by penetrating the opposite two pipe nut fixing plates 35 with the opposite bolts 38.
In order to facilitate the movable connection of the jumper mother 7 and ensure the safety and reliability of conduction, a supporting frame 41 can be fixedly connected to the first mounting seat 36, and of course, the supporting frame 41 can also be directly and fixedly connected with the fixed end plate 34; the end of the supporting frame 41 is provided with a universal joint 39, the universal joint 39 is connected with the fifth bus bar clamp 40 through bolts, the jumper tube 7 is fixedly provided with first bus bar conductive clamps 32 through connecting bolts, and the first bus bar conductive clamps 32 are preferably arranged at two opposite ends of the fixed end plate 34 respectively so as to increase the conductive current-carrying capacity of the jumper tube 7. The first bus bar 32 and the fifth bus bar 40 are electrically connected by a conductive connector 33. The conductive connection piece 33 preferably adopts a conductive telescopic copper bar, so as to ensure a certain telescopic margin between the first tubular bus-bar conductive clamp 32 and the fifth tubular bus-bar clamp 40, and ensure the safety and reliability of conductive connection.
The fifth bus-bar clamp 40 is electrically connected with the first bus-bar 9 corresponding to the a-phase converter valve tower 12A, and the universal joint 39 can provide a certain movement margin for the fifth bus-bar clamp 40, so as to improve the anti-seismic performance of the electrically conductive connection structure between the jumper bus 7 and the first bus-bar 9. The first mounting seat 36 may also be connected to the pressure equalizing ball bracket 20, the pressure equalizing ball bracket 20 is connected to the pressure equalizing ball 22, and the pressure equalizing ball 22 covers the first female conductive clamp 32 and the conductive connecting piece 33, as shown in fig. 6 and 7. By providing the equalizing balls 22, the electric field can be well uniform, and corona discharge caused by nonuniform electric field can be effectively prevented.
As shown in fig. 2, 8 and 9, the side-phase converter transformer side connection outlet structure includes a side-phase valve side post insulator, a second mount 44, a conductive coupling plate 43, a conductive connector 33, a sixth bus bar clamp 48, and first and second wire clamps 42 and 47. For convenience of description, the side-phase valve-side column insulator is set as the C-phase valve-side column insulator 6C here. The top end of the C-phase valve side post insulator 6C is fixedly connected with a second insulator flange 45, and a detachable fixed connection structure is formed between the second insulator flange 45 and a second mounting base 44 through a connecting bolt. The conductive connecting plate 43 is fixedly connected with the second mounting base 44, preferably, the conductive connecting plate 43 has an L-shaped structure, and two ends of the conductive connecting plate are respectively connected with the first wire clamp 42 and the second wire clamp 47 in a conductive manner. The first wire clamp 42 and the second wire clamp 47 can form a detachable fixed connection structure with the conductive connecting plate 43 through connecting bolts, and the sixth pipe bus-bar clamp 48 is installed on the second installation seat 44.
In order to prevent the installation interference, a supporting member 46 may be added between the second mounting seat 44 and the sixth bus bar clamp 48, and the supporting member 46 preferably adopts a "7" structure, one end of the supporting member 46 is fixedly connected with the second mounting seat 44, and the other end of the supporting member 46 is connected with the sixth bus bar clamp 48. Further, the universal joint 39 may be mounted on the support 46, and then the universal joint 39 and the sixth bus bar clamp 48 may be connected by bolts, as shown in fig. 9. By providing the universal joint 39, the sixth bus bar clamp 48 can be provided with a certain play margin to improve its anti-seismic performance.
The first wire clamp 42 and the suspension pipe nut 8 are in conductive connection through the flexible wire 4, the second wire clamp 47 is in conductive connection with a conductive core rod in the lower valve side sleeve 3 of the A-phase converter transformer 1A through the flexible wire 4, the sixth pipe nut 48 and the first pipe nut 9 corresponding to the C-phase converter valve tower 12C are in conductive connection, the conductive connecting plate 43 is in conductive connection with the sixth pipe nut 48 through the conductive connecting piece 33, and the conductive connecting piece 33 preferably adopts conductive telescopic copper bars so as to ensure a certain telescopic margin between the sixth pipe nut 48 and the conductive connecting plate 43 and ensure the safety and reliability of conductive connection. In addition, the second mounting seat 44 may be further connected to a pressure equalizing ball support 20, the pressure equalizing ball support 20 is connected to a pressure equalizing ball 22, and the pressure equalizing ball 22 covers the conductive connecting plate 43 and the conductive connecting member 33, as shown in fig. 8 and 9. By providing the equalizing balls 22, the electric field can be well uniform, and corona discharge caused by nonuniform electric field can be effectively prevented.
As shown in fig. 2, 10 and 11, the converter transformer valve side sleeve jumper structure comprises a converter transformer valve side sleeve, a jumper tube 7, a second tube female conductive clamp 51 and a pre-bent wire 50. For convenience of description, the converter valve side sleeve is herein set as the upper valve side sleeve 2 in the a-phase converter 1A. The outer port of the jumper tube 7 is sealed by a tube female end sealing cover 52, a detachable fixed connection structure is formed between the second tube female conductive clamp 51 and the jumper tube 7 through a fastening bolt 55, one end of the pre-bent wire 50 forms an annular structure, and an annular through hole at the end of the pre-bent wire is used for the jumper tube 7 to pass through; the pre-bent wire 50 has one end electrically connected to the second female conductive clamp 51 and the other end electrically connected to the conductive rod 49 inside the upper valve sleeve 2. Preferably, the end of the conductive core rod 49 is fixedly connected to the sleeve terminal clamp 53, and then the sleeve terminal clamp 53 is electrically connected to the pre-bent wire 50. One end of the pre-bent wire 50 is preferably formed in a 9-shaped circular ring structure, and a circular through hole at the end of the pre-bent wire is used for the jumper nut 7 to pass through. Further, one end of the pre-bent wire 50 forms a spring-like structure composed of several layers of side-by-side circular rings, and the jumper nut 7 penetrates through the spring-like structure, as shown in fig. 10 and 11. By adopting the structural design, on one hand, the wiring space is saved, and on the other hand, the activity margin of the jumper mother 7 is improved, so that the shock resistance is enhanced, and the safety and reliability of the electrical connection are improved.
After the converter transformer valve side sleeve pipe bridging connection structure is adopted, the converter transformer valve side sleeve pipe does not bear the weight of the load of the pipe bus any more, and a movable connection structure is formed between the jumper pipe bus and the converter transformer valve side sleeve pipe, so that a relatively movable space can be provided under extreme working conditions such as an earthquake, damage between a converter transformer valve side sleeve pipe terminal and the jumper pipe bus due to stress effect is avoided, and the safety and reliability of a converter transformer valve side connection outgoing line are effectively improved.
In order to effectively prevent corona discharge caused by uneven electric field at the position of the second tubular busbar conductive clamp 51, the second tubular busbar conductive clamp 51 can be fixedly connected with a voltage-equalizing ball support 20, the voltage-equalizing ball support 20 is connected with a voltage-equalizing ball 22, the voltage-equalizing ball 22 coats the second tubular busbar conductive clamp 51 and the voltage-equalizing ball support 20, and a through hole for the pre-bent wire 50 to penetrate out of the voltage-equalizing ball 22 is formed in the bottom of the voltage-equalizing ball 22. Similarly, in order to effectively prevent corona discharge caused by nonuniform electric field at the position of the sleeve terminal clamp 53, the end of the upper valve side sleeve 2 may be connected to the valve side sleeve equalizing cover 54, the valve side sleeve equalizing cover 54 covers the conductive core rod 49 and the sleeve terminal clamp 53, and a through hole for the pre-bent wire 50 to penetrate into the valve side sleeve equalizing cover 54 is formed at the top of the valve side sleeve equalizing cover 54, as shown in fig. 10 and 11.
The converter valve side outlet structure of the converter station angular group has attractive appearance and convenient implementation, can effectively solve the problem that the electrical distance between the leading-down line of the bus phase angle short circuit of the suspending pipe at the most edge and the leading-up line of the leading-out line of the converter valve tower from the side phase is not easy to control, and improves the safety and reliability of the converter valve side outlet of the converter station angular group.
The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. An angular group converter transformer valve side connection outlet structure which is characterized in that: the valve side post insulator (6) is fixedly connected with the jumper tube female (7) installation fixing clamp, and the jumper tube female (7) installation fixing clamp is connected with the fifth tube bus clamp (40); a first pipe bus conductive clamp (32) is fixedly arranged on the jumper bus (7), and conductive connection is formed between the first pipe bus conductive clamp (32) and a fifth pipe bus clamp (40) through a conductive connecting piece (33);
The mounting and fixing clamp for the jumper tube (7) comprises a tube mother fixing plate (35), a fixing end plate (34) and opposite penetrating bolts (38), wherein the tube mother fixing plate (35) is provided with two opposite penetrating bolts (38) penetrating through the two opposite tube mother fixing plates (35) and clamping and fixing the jumper tube (7) through the tube mother fixing plates (35); the pipe nut fixing plate (35) is provided with a circular arc groove matched with the outer diameter of the jumper pipe nut (7)
The top end of the valve side post insulator (6) is fixedly connected with a first insulator flange plate (37), the fixed end plate (34) is fixedly connected with a first mounting seat (36), and a detachable fixed connection structure is formed between the first insulator flange plate (37) and the first mounting seat (36) through a connecting bolt;
The jumper tube female (7) is fixedly connected with the support frame (41), the end part of the support frame (41) is provided with the universal joint (39), and the universal joint (39) is connected with the fifth tube bus clamp (40) through bolts.
2. The corner-group converter valve side connection outlet structure of claim 1, wherein: the first mounting seat (36) is connected with the pressure equalizing ball support (20), the pressure equalizing ball support (20) is connected with the pressure equalizing ball (22), and the pressure equalizing ball (22) coats the first tubular female conductive clamp (32) and the conductive connecting piece (33).
3. An angular group converter valve side connection outlet structure according to claim 1 or 2, characterized in that: the first pipe female conductive clamp (32) is arranged at two opposite ends of the jumper pipe female (7) installation fixing clamp.
4. An angular group converter valve side connection outlet structure according to claim 1 or 2, characterized in that: the conductive connecting piece (33) is a conductive telescopic copper bar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810347413.5A CN108493783B (en) | 2018-04-18 | 2018-04-18 | Corner-group converter transformer valve side connection outlet structure |
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| CN201810347413.5A CN108493783B (en) | 2018-04-18 | 2018-04-18 | Corner-group converter transformer valve side connection outlet structure |
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| CN108493783B true CN108493783B (en) | 2024-04-26 |
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| CN109067199B (en) * | 2018-10-05 | 2020-10-16 | 玉环汉普阀门有限公司 | Angular group converter transformer valve side connection outlet structure |
| CN110135096B (en) * | 2019-05-22 | 2022-12-02 | 国网新疆电力有限公司电力科学研究院 | Stress analysis method for tubular bus, down lead and hardware system |
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