CN103354319A - 220kV outdoor GIS double-dragonfly-type outlet wire arrangement structure - Google Patents

Abstract

The invention discloses a 220kV outdoor GIS double-dragonfly-type outlet wire arrangement structure. Although a GIS is adopted, the size of a total wire outlet side of a transformer substation is not reduced because of the width limitation of an outlet wire door frame of a conventional outdoor GIS. The technical scheme provided by the invention is characterized in that a wire outlet structure includes a vertical steel pipe pole and six wire outlet cross arms formed on the steel pipe pole. The wire outlet cross arms are all perpendicular to the steel pipe pole. The six wire outlet cross arms are distributed in three layers including an upper layer, a middle layer and a lower layer. Each of the layers is composed of two of the wire outlet cross arms disposed on two sides of the steel pipe pole respectively and the wire outlet cross arms in each layer are arranged in a staggered manner with the wire outlet cross arms on the same side and in the other layers. Double-loop vertical overhead wire outlet arrangement in the upper layer, the middle layer and the lower layer is formed through the cooperatively use of two GIS wire outlet intervals and the wire outlet structure. According to the invention, the wire outlet structure of the outdoor GIS power distribution device is simplified, the transverse size is reduced, floor space occupancy can be reduced distinctively and length of a 220kV GIS bus is reduced.

Description

A 220 kV outdoor GIS double-flying outlet layout structure

technical field

The invention relates to an arrangement structure and an outlet frame of electric equipment, in particular to a 220 kV outdoor GIS double-flying-fly outlet arrangement structure.

Background technique

With the development of the power grid, the number of substations is increasing, the land reserve resources are seriously insufficient, and the cost of land acquisition and demolition is increasing day by day. Especially in some urban center areas, the cost of land acquisition is on the rise, and the selection of substation sites is becoming more and more difficult. Land saving in substations is an urgent problem to be solved at present.

At present, GIS equipment is a kind of intensive power equipment, which has improved the shortcomings of conventional equipment layout, such as large scattered area, high failure rate, heavy installation, debugging and equipment maintenance, and long construction period. It has the advantages of compact layout, free (less ) The advantages of high maintenance and operation reliability can greatly save land occupation, reduce expensive upfront costs such as land acquisition, demolition, compensation, etc., in line with my country's basic national policy of land conservation, and are being widely used.

There are two types of GIS equipment: indoor layout and outdoor layout. Compared with indoor GIS schemes, outdoor GIS generally adopts all overhead lines. Since there are no restrictions on buildings, it can give full play to the characteristics of flexible GIS layout, thereby saving land. effect. However, at present, conventional outdoor GIS generally adopts A, B, and C three-phase outlet bushings arranged in a horizontal line, and the frame adopts a herringbone-shaped frame horizontally arranged in a line. The distance between the bushings is generally 3-3.5 meters, and the distance between the wires is 3.75. m, the distance between the side wire and the center of the door structure is 2.75 meters, and the minimum width of the door frame of the typical design recommended by the State Grid Corporation of China for a 220 kV power distribution device is 12m. Due to the limitation of the width of the outgoing line gantry, the overall size of the outgoing line side of the substation has not been reduced due to the use of GIS equipment.

Therefore, it is necessary to optimize the layout structure of GIS equipment outlets, reduce the width of the outlet interval, and arrange the power distribution device more compactly, so as to save land to the greatest extent and improve the utilization rate of land.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, and provide a 220 kV outdoor GIS double-flying outlet layout structure, which improves and optimizes the layout structure of the outdoor GIS outlet interval, and reduces the overall outlet side of the substation. Size, compress the area inside the substation wall, and save the outlet corridor.

For this reason, the present invention adopts the following technical scheme: a 220 kV outdoor GIS double-flying fly outlet arrangement structure, including at least two GIS outlet intervals and at least one outlet frame, and the at least two GIS outlet intervals are passed through horizontally arranged The busbar connection is characterized in that the outlet frame includes a vertical steel pipe pole and six outlet cross arms formed on the steel pipe pole, all the outlet cross arms are perpendicular to the steel pipe pole, and the six outlet cross arms are on the top The first, middle and lower layers are distributed, and each layer is composed of two outlet cross arms located on both sides of the steel pipe pole, and the outlet cross arms of any layer are spatially dislocated from the same side outlet cross arms of the other second floors;

There are three horizontally placed phase wires in each GIS outlet interval, and the three phase wires are respectively led up by three vertical outlet sleeves, and then connected to the outer ends of the outlet crossarms above the outlet sleeves through the wires. The external hanging point is connected, and two GIS outgoing line intervals and one outgoing line frame are used together to form the upper, middle and lower three-layer double-circuit vertical overhead outgoing lines.

The present invention simplifies the outgoing line structure of the outdoor GIS power distribution device, and compresses the lateral size; on the premise that the horizontal distance between adjacent outgoing line wires meets the electrical safety requirements, the overall lateral size of the outgoing line side of the substation is reduced, and the area occupied by the enclosure wall of the substation is compressed area, saving the outlet corridor. the

As a further improvement and supplement to the above-mentioned technical solution, the present invention takes the following technical measures:

Further, an angle of 180 degrees is formed between the two outlet cross-arms of the middle layer; the dislocation angle between the upper-layer outlet cross-arms and the outlet cross-arms on the same side of the middle layer is preferably 45-55 degrees (most preferably 52 degrees), and the upper layer An angle of 70-90 degrees is formed between the two outlet cross-arms of the lower layer; the misalignment angle between the outlet cross-arms of the lower layer and the outlet cross-arms on the same side of the middle layer is also preferably 45-55 degrees (most preferably 52 degrees), and the two outlets of the lower layer An angle of 70-90 degrees is also formed between the root outlet cross-arms. By adopting the wire outlet frame arranged above, the overall structure of the wire outlet frame is compact.

Further, the lightning arrester for the outlet interval of the GIS is built in, one phase line is perpendicular to the busbar, and the other two phase lines extend in a straight line and then bend, so that the three outlet bushings are arranged in a vertical line, which can further reduce the overall size of the substation. The horizontal dimension of the outlet side. the

Further, the horizontal distance between adjacent phase lines is 0.5-0.7 meters, the distance between adjacent bushings is 3.0-3.5 meters, and the distance between the center of the outlet frame and the outlet bushing is 3.3-3.5 meters to ensure the electrical safety distance requirements.

Further, the vertical distance between the hanging points of the three outlet cross-arms on the same side is 3.5-3.8 meters, the height of the hanging points of the outlet cross-arms on the lower floor is 9-9.5 meters from the ground, and the adjacent outlet cross-arms on the same side The height difference between them is 5.0-5.5 meters to ensure a safe distance between the outgoing wires.

Further, a lightning conductor crossarm for suspending the lightning conductor is arranged directly above the outlet crossarm on the upper layer.

Further, the height difference between the lightning conductor cross-arm and the outgoing line cross-arm located on the upper layer is preferably 4-4.5m, so as to ensure that the outgoing wire is within the protection range of the lightning arrester.

Furthermore, the two outlet crossarms in each layer of outlet crossarms are arranged symmetrically with the steel pipe rod as the axis, so that the force on both sides of the steel pipe rod is even, and the structure is more stable.

The present invention compresses the lateral dimension of the outlet side of the outdoor GIS power distribution device. Because of the built-in lightning arrester, the interval width of single-circuit outlet lines can be reduced to 6 meters, and the interval width of double-circuit outlet lines can be reduced to 12 meters, which can significantly reduce the occupied area. Reduce the cost of land acquisition, reduce the length of the 220kV GIS busbar, reduce the cost of GIS, the outlet structure is simple, and the amount of steel is saved, so the overall investment is far less than the conventional GIS power distribution device layout structure, especially in areas with high land acquisition costs, the advantages are more obvious.

Description of drawings

Figure 1 is a schematic diagram of the layout of an existing conventional 220 kV outdoor GIS power distribution device.

Fig. 2 is a structural schematic diagram of the present invention.

Fig. 3 is a schematic diagram of the plane layout of the GIS power distribution device of the present invention.

Fig. 4 is a structural schematic diagram of the outlet frame of the present invention.

Fig. 5 is a top view of the cross arm of the lower layer of the present invention.

Fig. 6 is a top view of the cross arm of the middle layer of the present invention.

Fig. 7 is a top view of the upper layer outlet cross arm of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 2-7, the 220 kV outdoor GIS double-flying outlet layout structure is composed of four GIS outlet intervals 1 and two outlet frames. The four GIS outlet intervals 1 pass through two horizontally arranged busbars 2 connections, built-in surge arrester for GIS outlet interval. The three phase wires 8, 9, and 10 of each GIS outlet interval are placed horizontally, one phase wire 8 is perpendicular to the bus bar 2, and the other two phase wires 9, 10 extend in a straight line and bend outward, so that the three outlet sleeves The tubes are arranged in a vertical line, the horizontal distance between adjacent phase lines is 0.5-0.7 meters, the distance between adjacent bushings is 3.0-3.5 meters, and the distance between the center of the outlet frame and the outlet bushing is 3.3-3.5 meters .

The outlet frame is composed of an independent vertical steel pipe pole 3 and six outlet cross-arms formed on the steel pipe pole. All the outlet cross-arms are perpendicular to the steel pipe pole. Three-layer distribution, each layer is composed of two outlet cross-arms located on both sides of the steel pipe pole and arranged symmetrically with the steel pipe pole as the axis, and the outlet cross-arm of any layer is on the same side as the other two layers in space The outgoing crossarm is misplaced. The two outlet cross-arms 5 of the middle layer form an included angle of 180 degrees; the upper-layer outlet cross-arms and the outlet cross-arms 5 on the same side of the middle layer respectively have a misalignment angle of 45-55 degrees, and the two outlet cross-arms 6 of the upper layer form an angle of 180 degrees. The included angle is 70-90 degrees; the misalignment angle between the outlet cross-arms of the lower layer and the outlet cross-arms 5 on the same side of the middle layer is also 45-55 degrees, and an included angle of 70-90 degrees is also formed between the two outlet cross-arms 4 of the lower layer.

The three phase wires are respectively led up by three vertically arranged outlet casings 7, and then respectively connected to the outer end hanging points of the outlet crossarms above the outlet casings through wires (A, B, C); The hanging points at the outer ends of the three outlet cross arms on the other side are respectively connected to the three phase wires at the outlet interval of another GIS through wires and vertically arranged outlet sleeves. Two GIS outgoing line intervals and one outgoing line frame are used together to form upper, middle and lower three-layer double-circuit vertical overhead outgoing lines.

The vertical distance range of the three outgoing cross-arm hanging points on the same side is 3.5-3.8 meters, the hanging point of the outgoing cross-arm 4 on the lower floor is 9-9.5 meters above the ground, and the adjacent outgoing cross-arms on the same side The height difference range between the poles is 5.0-5.5 meters.

A lightning conductor crossarm 11 for suspending the lightning conductor is provided directly above the outlet crossarm on the upper floor, and the height difference range between the lightning conductor crossarm 11 and the outlet crossarm 6 on the upper floor is 4-4.5m.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the structure of the present invention in any form. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention fall within the protection scope of the present invention.

Claims (8)

1. one kind 220 kilovolts outdoor GIS round trip flight dragonfly outlet arrangements, comprise at least two GIS outgoing line intervals (1) and at least one outlet structure, described at least two GIS outgoing line intervals (1) connect by the bus (2) of horizontally set, it is characterized in that, described outlet structure comprises an erect-type steel pipe pole (3) and the six roots of sensation outlet cross-arm that forms at steel pipe pole, all outlet cross-arms are all vertical with steel pipe pole, described six roots of sensation outlet cross-arm is presented, in, lower three layers of distribution, every layer forms by two outlet cross-arms that lay respectively at the steel pipe pole both sides, and the outlet cross-arm of one deck spatially all misplaces with other same side output terminal cross-arms of two layers arbitrarily;

Each GIS outgoing line interval has three phase lines (8,9,10) that are horizontal positioned, described three phase lines are drawn by three vertical outlet casing tubes (7) that arrange respectively, be connected by the outer end hanging wire point of wire with the outlet cross-arm that is positioned at the outlet casing tube top respectively again, be used in conjunction with by two GIS outgoing line intervals and an outlet structure and form two times vertical overhead outlets of upper, middle and lower-ranking.

2. 220 kilovolts of outdoor GIS round trip flight dragonfly outlet arrangements according to claim 1 is characterized in that, form 180 degree angles between two outlet cross-arms (5) in described middle level; Outlet cross-arm in upper strata is the 45-55 degree with the outlet cross-arm (5) of middle level homonymy dislocation drift angle respectively, forms 70-90 degree angle between two outlet cross-arms (6) on upper strata; Lower floor's outlet cross-arm also is the 45-55 degree with the outlet cross-arm (5) of middle level homonymy dislocation drift angle respectively, also forms 70-90 degree angle between two outlet cross-arms (4) of lower floor.

3. 220 kilovolts of outdoor GIS round trip flight dragonfly outlet arrangements according to claim 1 and 2, it is characterized in that, the lightning arrester of described GIS outgoing line interval is built-in, a phase line (8) is perpendicular to bus (2), again bending of other two phase lines (9,10) linearly extension makes three outlet casing tubes (7) be vertical word order.

4. 220 kilovolts of outdoor GIS round trip flight dragonfly outlet arrangements according to claim 3, it is characterized in that, the level interval of adjacent phase line is 0.5-0.7 rice, and the spacing of adjacent casing is 3.0-3.5 rice, and the spacing of the center of outlet structure and outlet casing tube (7) is 3.3-3.5 rice.

5. 220 kilovolts of outdoor GIS round trip flight dragonfly outlet arrangements according to claim 1 and 2, it is characterized in that, the fore-and-aft distance that is positioned at three outlet cross-arm hanging points of homonymy is 3.5-3.8 rice, it is 9-9.5 rice that the hanging wire that is positioned at the outlet cross-arm (4) of lower floor is selected apart from ground level, and the difference in height between the adjacent outlet cross-arm of homonymy is 5.0-5.5 rice.

6. 220 kilovolts of outdoor GIS round trip flight dragonfly outlet arrangements according to claim 1 and 2 is characterized in that, be positioned at upper strata outlet cross-arm directly over be provided with a lightning conducter cross-arm (11) that be used for to hang lightning conducter.

7. 220 kilovolts of outdoor GIS round trip flight dragonfly outlet arrangements according to claim 6 is characterized in that, the difference in height between described lightning conducter cross-arm (11) and the upper strata outlet cross-arm is 4-4.5m.

8. 220 kilovolts of outdoor GIS round trip flight dragonfly outlet arrangements according to claim 1 and 2 is characterized in that, two outlet cross-arms in every layer of outlet cross-arm are symmetrical arranged as axle is take steel pipe pole.

Images