CN202268663U - Bridging over-current hardware of CT (Current Transformer) equipment and tubular bus bar for converter station - Google Patents

Abstract

The utility model provides a bridge over-current fitting for CT equipment and a busbar in a converter station, which connects the CT equipment and the busbar through the support of a post insulator, including fixing fittings for the busbar, anti-halo balls, current-carrying wires and CT wire jumpers. Wire clamps, pipe busbar fixing hardware and anti-corona balls are installed on the post insulators through fasteners, CT wire jumper clamps are installed on CT equipment through fasteners, and the two ends of the current-carrying wires are respectively fixed through fasteners On the pipe busbar fixing fittings and CT wire jumper clamps; realize the fixed support of the pipe busbar, anti-coronavirus and its over-current connection with CT equipment, the mechanical and electrical properties are safe and reliable, the conductivity is good, and the overall anti-coronavirus The effect is good, and it is convenient for transportation and installation.

Description

Over-current fittings for cross-connection between CT equipment and pipe bus in converter station

technical field

The utility model relates to the field of fittings for valve halls of converter stations in direct current transmission line equipment, in particular to a fitting for crossover flow between CT equipment and pipe busbars for converter stations.

Background technique

At present, my country has become a major DC power transmission country with the most DC projects in operation and under construction, the largest capacity and the longest lines in the world. The converter station is an important part of the DC transmission project. The valve hall of the converter station is a closed space. The valve hall is equipped with important equipment such as valve towers, bushings, and voltage transformers. The conversion of AC and DC is also in the valve hall. Therefore, corona and radio interference in the valve hall are particularly serious. At the same time, due to the limited space of the valve hall, the spatial structure of the existing fittings can no longer meet the corresponding space requirements. The utility model not only considers the electrical performance and mechanical performance, but also ensures enough space for the installation structure to realize the fixed support, anti-coronavirus and reliable connection flow between the horizontal pipe busbar in the ±400kV converter station and CT equipment.

Utility model content

The purpose of the utility model is to solve the problems of fixing the pipe busbar, jumping wires with CT equipment, diversion, anti-halo and anti-noise.

In order to achieve the above purpose, the utility model provides a bridge overcurrent fitting between CT equipment and busbar in a converter station. Jumper clips for current wires and CT wires, pipe busbar fixing hardware and anti-halo balls are installed on the post insulators through fasteners, CT wire jumper clips are installed on CT equipment through fasteners, and both ends of the current-carrying wires They are respectively fixed on the pipe busbar fixing hardware and the CT wire jumper clamp by fasteners.

The pipe busbar fixing hardware includes a base, a body, a clamp-type cover plate and a small cover plate, and the base and the body are hingedly connected; the body and the clamp-type cover plate fix the pipe busbar through fasteners; one end of the current-carrying wire The base is mounted on the post insulator through fasteners to clamp between the wire clamp cover and the small cover.

The anti-sickness ball includes an upper hemisphere, a lower hemisphere and a support frame, the support frame and the upper hemisphere are welded together, and the upper hemisphere and the lower hemisphere are fixedly connected into a sphere by countersunk bolts; the anti-sickness ball is installed on the On the post insulator, the anti-corona ball is provided with through holes.

The CT wire jumper clamp includes a first clamp body, a cover plate and a second clamp body, the first clamp body and the second clamp body are assembled together by fasteners, and the cover plates are respectively arranged on the first line On the clamp body and the second clamp body, the other end of the current-carrying wire is crimped with the cover plate through the fastener.

The base of the pipe busbar fixing hardware is provided with a connecting hole in the shape of an oblong hole, and the base and the body are hinged with pin-hole bolts;

The outer surface of the anti-sickness ball keeps a smooth radian, and the outer surface of the through hole of the anti-sickness ball bends toward the inside of the anti-sickness ball; the mounting hole at one end of the support frame is set in the shape of an oblong hole. ``

The CT wire jumper clamp is at an upward angle of 15°, and the current-carrying wires are arranged in a square cage with four small-pitch pure aluminum stranded wires.

The fasteners are bolts and nuts.

Pipe busbar fixing fittings, anti-halo balls and CT wire jumper clamps are used as a complete set of jumper overcurrent fittings in the utility model, but they are all independent single fittings, which can be used in conjunction with other fittings independently according to the use conditions.

The utility model has the following advantages:

1. The fixed support of the pipe busbar adopts the rotating pipe busbar fixing fittings, which are located in the anti-halo ball. The pipe busbar can be rotated relatively to adjust the winding degree of the pipe busbar due to its own weight; the whole set of fittings meets the requirements of the fixed pipe busbar, overcurrent and Anti-halo and other comprehensive requirements.

2. The anti-halo effect is good through the anti-halo ball and the pressure equalizing ring of CT equipment, thus ensuring the long-term reliable operation of the whole set of fittings.

3. The structure and size of the anti-halo ball have been verified to be very reasonable. It can not only leave a reasonable space for the installation of hardware in the ball, but also ensure a reasonable electrical distance between the anti-halo ball and the wall and the ground. The outer surface is polished and has a good anti-halation effect.

4. The CT wire jumper clamp clamps the wire part upward at an angle of 15°, which effectively prevents the wire from sagging and touching the voltage equalizing ring of the CT equipment.

5. Four LJ-800 small-pitch pure aluminum stranded wires are arranged in a square cage (split distance 200) for the current-carrying wires, which can make the current-carrying wires outside the anti-halation ball without anti-halation devices better anti-halo itself .

6. The outer surfaces of all fittings are arc-shaped, and the bolts are buried in the bolt holes, which can reduce the tip discharge phenomenon;

7. Fasteners are used to connect parts and equipment without any welding or crimping. It has installation flexibility and detachability, which is convenient for product transportation and on-site installation and construction.

Description of drawings

Fig. 1 is the schematic left view of the structural installation of the embodiment of the utility model.

Fig. 2 is the schematic front view of the structural installation of the embodiment of the utility model.

Fig. 3 is a front view of the structure of the busbar fixing fittings of the embodiment of the present invention.

Fig. 4 is a left view of the structure of the busbar fixing fittings in the embodiment of the present invention.

Fig. 5 is the structure diagram of the anti-halo ball of the utility model embodiment.

Fig. 6 is a structural schematic diagram of a CT wire jumper wire clip according to an embodiment of the present invention.

Among them: 1-post insulator; 2-pipe busbar; 3-pipe busbar fixing fittings; 4-anti-halo ball; 5-current-carrying wire; 6-CT wire jumper clamp; 7-CT equipment; 8-base; 9 -body; 10-clamp cover plate; 11-pin hole bolt; 12-small cover plate; 13-through hole; 14-support frame; 15-first clamp body; 16-cover plate; 17-second line clip body.

Detailed ways

Preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

The embodiment is shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6. This embodiment provides a CT device for a converter station and a pipe busbar bridge overcurrent fitting, including a pipe busbar fixing fitting 3, Anti-sickness ball 4, current-carrying wire 5 and CT wire jumper clip 6. Pipe busbar fixing hardware 3 and anti-halo ball 4 are installed on the external post insulator 1 through fasteners, CT wire jumper clamp 6 is installed on CT equipment 7 through fasteners, and the two ends of the four current-carrying wires 5 Fasteners are respectively fixed on the tube busbar fixing fitting 3 and the CT wire jumper clamp 6 to form the tube busbar 2, the tube busbar fixing fitting 3, the current-carrying wire 4, the CT wire jumper clip 6 and the CT equipment 7. The diversion path realizes the connection flow between the pipe bus 2 and the CT equipment 7 . Pipe busbar fixing fittings 3 are protected against dizziness through anti-dizzy ball 4 , and CT wire jumper clamp 6 is prevented from dizziness through the equalizing ring on CT equipment 7 .

The bus bar fixing hardware 3 includes four parts: a base 8 , a body 9 , a clip-type cover 10 and a small cover 12 . The main body 9 and the base 8 form a rotary hinged connection through pin-hole bolts 11, which can not only fix and support the bus bar 2, but also allow relative rotation to adjust the winding due to its own weight. The hole connecting the base 8 and the upper end flange of the post insulator 1 is designed as an oblong hole, so as to adjust the installation position on site; the busbar 2 is fixed by bolts between the body 9 and the clamp type cover plate 10; one end of the current-carrying conductor 5 is passed through Bolts and small cover plate 12 are fixed on the line clip type cover plate 10 .

Anti-sickness ball 4 comprises upper hemisphere, lower hemisphere and support frame 14, and spheroid is divided into upper and lower two hemispheres, has two through holes 13 on the anti-sickness ball, or can perforate as required, and through hole 13 flangs inwards to avoid Sharp discharge at the opening. The outer surface of the anti-halation ball is anti-halation by polishing. The support frame 14 is welded together with the lower hemisphere through a ring-shaped hoop, and the upper hemisphere is fixed on the hoop with a cross-recessed countersunk head screw to form a hollow sphere with the lower hemisphere; the other end of the support frame 14 is installed on the post insulator through a fastener 1 to fix the whole anti-sickness ball 4, the mounting holes here are oblong holes, and the mounting position can be adjusted appropriately.

The CT wire jumper clamp 6 includes a first clamp body 15, a cover plate 16 and a second clamp body 17, and the first clamp body 15 and the second clamp body 17 are paired together to form a horizontal and vertical split distance of 200 The wire clamp of the wire clip, the wire clamped by the wire clamp is biased upward by 15° to prevent the current-carrying wire from sagging and touching the ring body of the CT equipment 7. and the cover plate 15 are fixed on the two bodies of the wire jumper clamp 6, and the entire clamp is also installed on the connecting plate of the CT equipment 7 by bolts. All fittings adopt arc-shaped outer surface, and the bolts are buried in the bolt holes, which can reduce tip discharge.

Four LJ-800 small-pitch pure aluminum stranded wires are arranged in a square cage for the current-carrying wire 5, so that the current-carrying wire without an anti-halo device outside the anti-halo ball 4 can better prevent itself from haloing.

The beneficial effect of this embodiment is to realize the fixed support of the pipe bus, anti-halo and its over-current connection with CT equipment, the mechanical and electrical properties are safe and reliable, the flow conductivity is good, the overall anti-halo effect is good, and it is convenient for transportation and Install.

Claims (6)

1. The CT equipment and busbar of the converter station are used to bridge over-current fittings, and the CT equipment and the busbar (2) are connected through the support of the post insulator (1), including the fixing fittings of the busbar (3) and the anti-halo ball (4) , current-carrying wires (5) and CT wire jumper clamps (6), characterized in that: tube busbar fixing fittings (3) and anti-halation balls (4) are installed on the post insulator (1) through fasteners, CT The wire jumper clamp (6) is installed on the CT equipment (7) through fasteners, and the two ends of the current-carrying wire (5) are respectively fixed on the pipe busbar fixing hardware (3) and the CT wire jumper wire through fasteners clamp (6). 2. According to claim 1, the CT equipment for the converter station and the pipe busbar bridge overcurrent fittings are characterized in that: the pipe busbar fixing fittings (3) include a base (8), a body (9), and a clamp Type cover plate (10) and small cover plate (12), movable hinged connection between the base (8) and the body (9); the body (9) and the clamp type cover plate (10) fix the pipe bus through fasteners ( 2); one end of the current-carrying wire (5) is clamped between the clip-type cover (10) and the small cover (12) by a fastener, and the base (8) is installed on the post insulator (1) by a fastener )superior; The anti-sickness ball (4) includes an upper hemisphere, a lower hemisphere and a support frame (14), the support frame (14) is welded together with the upper hemisphere, and the upper and lower hemispheres are fixedly connected into a sphere by countersunk bolts; the anti-sickness ball (4) Install the support frame on the post insulator (1) with fasteners, and the anti-halation ball (4) is provided with a through hole (13); The CT wire jumper clamp (6) includes a first clamp body (15), a cover plate (16) and a second clamp body (17), and the first clamp body and the second clamp body are connected by fasteners Assembled together, the cover plate (16) is respectively set on the first clamp body (15) and the second clamp body (17), and the other end of the current-carrying wire (5) is pressed by the cover plate (16) through the fastener catch. 3. According to claim 2, the CT equipment for the converter station and the pipe busbar cross-over flow fittings are characterized in that: the base (8) of the pipe busbar fixing fittings (3) is provided with a connecting hole in the shape of an oblong hole, The base (8) and the body (9) are hingedly connected by pin-hole bolts (11). 4. According to claim 2 or 3, the CT equipment used in the converter station and the pipe bus bridge over-current fittings are characterized in that: the outer surface of the anti-halation ball (4) maintains a smooth radian, and the through hole (13) The edges are bent inward; the mounting hole at one end of the support frame (14) is set in the shape of an oblong hole. the 5. The over-current fitting between the CT equipment and the bus bar of the converter station according to claim 4, characterized in that: the jumper clamp (6) of the CT wire is at an angle of 15° upward, and the current-carrying wire (5) Four small-pitch pure aluminum stranded wires are arranged in a square cage. 6. The overcurrent fitting between the CT equipment and the bus bar of the converter station according to claim 1, 2 or 3, characterized in that: the fasteners are bolts and nuts.

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