CN108879343B - HGIS double compartment ring busbar device - Google Patents

Abstract

The invention discloses an HGIS double-interval annular bus device, which comprises two groups of combined electrical appliances, wherein a first outgoing isolating switch, a second current transformer, a circuit breaker and a first current transformer of each group of combined electrical appliances are sequentially and electrically connected in series, an outgoing line side sleeve is electrically connected with the first current transformer, a bus side sleeve is electrically connected with the first outgoing line isolating switch, and the first outgoing line isolating switch is also connected with the second outgoing line isolating switch; the first outgoing line isolating switches of the two groups of combined electrical appliances are connected with each other, and the second outgoing line isolating switches of the two groups of combined electrical appliances are also connected with each other. The invention has the advantages that: the two groups of first outgoing line isolating switches and the two groups of second outgoing line isolating switches form an annular loop, the original six groups of connecting sleeve pipes are reduced to four groups of connecting sleeve pipes, the longitudinal size of the corresponding distribution device is reduced from original 28 meters to 17 meters, 39.3% of land is reduced, and the land is effectively saved.

Description

HGIS double compartment ring busbar device

Technical Field

The invention relates to a HGIS double-spaced annular busbar device.

Background technique

The two HGIS bays in the conventional back-to-back arrangement are shown in Figure 1. A total of 6 sets of wiring bushings are required, with 2 sets of busbar wiring bushings and 1 set of outgoing wiring bushings in each bay. According to the design specifications, the distance between the unobstructed live parts of the 220kV outdoor power distribution device that are parallel and not shut down for maintenance at the same time is 3800mm. Considering the HGIS grading ring and a certain safety margin, the distance between the two sets of bushings is 4500mm. In the conventional back-to-back arrangement, a 3000mm road is also set between the two bays to facilitate the lifting of equipment. Therefore, the distance between the two-circuit bushings is designed to be 6500mm, which will occupy a larger site, which is very inappropriate now that land resources are becoming increasingly scarce.

Summary of the invention

The object of the present invention is to provide a HGIS double-interval annular busbar device, which can effectively solve the problem that the distance between two HGISs placed back to back is too large and the land area occupied is too large.

In order to solve the above technical problems, the present invention is achieved through the following technical solutions: an HGIS double-interval ring busbar device, comprising two groups of combined electrical appliances, each group of the combined electrical appliances comprising a circuit breaker, a first outgoing line disconnector, a second outgoing line disconnector, a first current transformer, a second current transformer, an outgoing line side bushing and a bus side bushing, the first outgoing line disconnector, the second current transformer, the circuit breaker and the first current transformer are electrically connected in series in sequence, and sulfur hexafluoride gas is used as an insulating medium, the electrically connected first outgoing line disconnector, the circuit breaker, the first current transformer and the second current transformer are enclosed in a gas chamber of insulating gas, the outgoing line side bushing is electrically connected to the first current transformer, the bus side bushing is electrically connected to the first outgoing line disconnector, and the first outgoing line disconnector is also connected to the second outgoing line disconnector; the first outgoing line disconnectors of the two groups of combined electrical appliances are connected to each other, and the second outgoing line disconnectors of the two groups of combined electrical appliances are also connected to each other.

Preferably, the two groups of first outlet disconnectors and the two groups of second outlet disconnectors are connected via GIL pipelines. The GIL pipeline connection improves overall electrical performance.

Preferably, the GIL pipeline includes a porcelain insulator sleeve and a connecting air chamber, the connecting air chamber is fixed at the end of the porcelain insulator sleeve, a sealing gasket is provided between the connecting air chamber and the porcelain insulator sleeve, and a plurality of insulation adjustment support mechanisms are provided in the porcelain insulator sleeve, the insulation adjustment support mechanisms include an elastic sleeve and a spring fixed to the inner side wall of the porcelain insulator sleeve, and the elastic sleeve is spiral. A sealing gasket is provided between the secondary insulator sleeve and the connecting air chamber to improve the overall air tightness, and an insulation adjustment support mechanism is provided to fix the position of the wire passing through the porcelain insulator sleeve, and the spiral elastic sleeve can better play the role of correcting the position of the wire, and the spiral elastic sleeve can expand the contact area between the sleeve and the wire, reducing damage to the wire.

Preferably, there is only one spring on the same axial section of the elastic sleeve, the central angles between two springs adjacent to each other along the axial direction of the elastic sleeve are equal, and the axial spacing between two springs adjacent to each other along the axial direction of the elastic sleeve is also equal. The elastic sleeve is further supported by arranging the spring, and such a spring arrangement can distribute the elastic force to the entire sleeve as evenly as possible.

Preferably, a line card is provided in the connecting air chamber, and the line card includes three fixed sheets and three movable sheets, the fixed sheets and movable sheets are arranged at intervals and form a ring, the line card includes a top and a bottom, the top is the wire entrance end, the distance from the top of the fixed sheet to the center axis of the line card is greater than the distance from the bottom of the fixed sheet to the center axis of the graphics card, the middle of the movable sheet is connected to the two adjacent fixed sheets by rotating the shaft, the upper part of the movable sheet forms an obtuse angle with the lower part of the movable sheet, after the wire is inserted from the entrance end, it is squeezed and deformed by the fixed sheet and then pushes the lower part of the movable sheet, so that the upper part of the movable sheet is close to the wire. After the wire is inserted, the upper end of the movable sheet is squeezed to gather toward the center to clamp the wire, and the entire line card is in a truncated cone shape, and the wire is inserted more tightly, which is convenient for quickly clamping the wire.

Preferably, when the wire is not inserted, the angle between the upper part of the movable sheet and the cross section of the wire clamp axis is equal to the angle between the fixed sheet and the cross section of the wire clamp axis, and the lower part of the movable sheet is parallel to the axis of the wire clamp. When the wire is inserted and located at the upper part of the movable sheet, the shape formed by the entire movable sheet and the fixed sheet has guiding properties and will not be stuck between the two fixed sheets or the two movable sheets too early, ensuring that the wire can be inserted into the wire clamp to a sufficient depth before clamping the wire.

Compared with the prior art, the advantages of the present invention are: a ring loop is formed by two groups of first outgoing line isolating switches and two groups of second outgoing line isolating switches, the original six groups of wiring bushings are reduced to four groups of wiring bushings, and the corresponding longitudinal size of the distribution device is reduced from the original 28 meters to 17 meters, a reduction of 39.3%, effectively saving land.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a diagram of the spacing of two HGIS arranged back to back in the existing arrangement;

FIG2 is a front view of the HGIS double-interval annular busbar device of the present invention;

FIG3 is a top view of FIG2 ;

FIG4 is a cross-sectional view of the GIL pipeline of the present invention;

FIG5 is a top view of the present invention when the line clamp is not clamping the wire;

FIG6 is a top view of the centerline clamp of the present invention after clamping the conductor.

Detailed ways

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

2 and 3 are embodiments of the HGIS double-interval ring bus device of the present invention. The HGIS double-interval ring bus device includes two groups of combined electrical appliances, each of which includes a circuit breaker CB, a first outgoing disconnector DS1, a second outgoing disconnector DS2, a first current transformer CT1, a second current transformer CT2, an outgoing bushing BSG1 and a bus bushing BSG2. The first outgoing disconnector DS1, the second current transformer CT2, the circuit breaker CB and the first current transformer CT1 are electrically connected in series in sequence, and sulfur hexafluoride gas is used as an insulating medium. The electrically connected first outgoing disconnector DS1, circuit breaker CB, first current transformer CT1 and second current transformer CT2 are enclosed in an insulating gas chamber, the outgoing side bushing BSG1 is electrically connected to the first current transformer CT1, the bus side bushing BSG2 is electrically connected to the first outgoing disconnector DS1, and the first outgoing disconnector DS1 is also connected to the second outgoing disconnector DS2; the first outgoing disconnectors DS1 of the two groups of combined electrical appliances are connected to each other through the GIL pipeline 1, and the second outgoing disconnectors DS2 of the two groups of combined electrical appliances are also connected to each other through the GIL pipeline 1.

A ring loop is formed by two sets of first outgoing line isolating switches DS1 and two sets of second outgoing line isolating switches DS2, reducing the original six sets of wiring bushings to four sets of wiring bushings. The corresponding longitudinal dimension of the distribution device is reduced from the original 28 meters to 17 meters, a reduction of 39.3%, effectively saving land.

As shown in FIG4 , the GIL pipeline 1 includes a porcelain insulator sleeve 11 and a connecting air chamber 21. The connecting air chamber 21 is fixed at the end of the porcelain insulator sleeve 11. A sealing gasket 31 is provided between the connecting air chamber 21 and the porcelain insulator sleeve 11. The porcelain insulator sleeve 11 is provided with a plurality of groups of insulation adjustment support mechanisms. The insulation adjustment support mechanisms include an elastic sleeve 111 and a spring 112 fixed to the inner wall of the porcelain insulator sleeve. The elastic sleeve 111 is spiral. The elastic sleeve 111 is used to strengthen the position fixation of the conductor of the porcelain insulator sleeve 11, and the insulation is strengthened by the porcelain insulator sleeve 11, while the connecting air chamber 21 plays a connecting and fixing role.

In order to strengthen the fixation of the wire in the porcelain insulator sleeve 11, there is only one spring 112 on the same axial section of the elastic sleeve 111, and the central angles corresponding to every two springs 112 adjacent to each other along the axial direction of the elastic sleeve are equal, and the axial spacing between every two springs 112 adjacent to each other along the axial direction of the elastic sleeve is also equal. The so-called two adjacent springs 112 refer to two springs 112 adjacent to each other in the vertical height. For example, there are four springs 112 from top to bottom, then the central angle between the first spring and the second spring in the horizontal plane projection is 90 degrees, and the central angle between the second spring and the third spring in the horizontal plane projection is also 90 degrees, and the central angle between the third spring and the fourth spring in the horizontal plane projection is also 90 degrees. Such an arrangement allows the spring 112 to further strengthen the support of the elastic sleeve 111.

As shown in Figures 4, 5 and 6, in order to achieve fast connection of the wire, a wire card 211 is provided in the connection air chamber 21, and two groups of wire cards are provided in each connection air chamber. The two groups of wire cards are arranged back to back, and the two groups of wire cards are electrically connected. The wire card 211 includes three fixed sheets 2111 and three movable sheets 2112. The fixed sheets 2111 and the movable sheets 2112 are arranged at intervals and form a ring. The wire card 211 includes a top and a bottom, and the top is the wire entrance end. The distance from the top of the fixed sheet 2111 to the central axis of the wire card 211 is greater than the distance from the bottom of the fixed sheet 2111 to the center of the graphics card The middle part of the movable piece 2112 is connected to the two adjacent fixed pieces 2111 by rotating the shaft, and the upper part of the movable piece 2112 forms an obtuse angle with the lower part of the movable piece 2112. After the wire is inserted from the entrance end, it is squeezed and deformed by the fixed piece 2111 and then pushes the lower part of the movable piece 2112, so that the upper part of the movable piece 2112 is close to the wire. When the wire is not inserted, the angle between the upper part of the movable piece 2112 and the axial section of the line clamp 211 is equal to the angle between the fixed piece 2111 and the axial section of the line clamp 211, and the lower part of the movable piece 2112 is parallel to the axis of the line clamp 211. After the wire is inserted into the line clamp 211, the wire is squeezed and deformed to push the lower part of the movable piece 2112, so that the movable piece 2112 rotates, and the upper part of the movable piece 2112 moves toward the center to clamp the inserted wire.

In this scheme, two busbar lead bushings are set for each phase of the HGIS power distribution device, which are connected to the positive and auxiliary pipeline busbars through soft wires. Four groups of isolating and grounding switches are separated by intervals and installed in a ring on both sides of the busbar lead bushings through GIL pipeline 1. The double interval scheme reduces the number of air bushings by six, and the longitudinal size of the power distribution device is reduced from 28 meters to 17 meters, a reduction of 39.3%.

The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims (2)

1. HGIS double-interval annular busbar device, its characterized in that: the combined electrical appliances comprise two groups of combined electrical appliances, each group of combined electrical appliances comprises a circuit breaker, a first outgoing line isolating switch, a second outgoing line isolating switch, a first current transformer, a second current transformer, an outgoing line side sleeve and a bus side sleeve, wherein the first outgoing line isolating switch, the second current transformer, the circuit breaker and the first current transformer are sequentially and electrically connected in series, sulfur hexafluoride gas is used as an insulating medium, the electrically connected first outgoing line isolating switch, the circuit breaker, the first current transformer and the second current transformer are sealed in an insulating gas chamber, the outgoing line side sleeve is electrically connected with the first current transformer, the bus side sleeve is electrically connected with the first outgoing line isolating switch, and the first outgoing line isolating switch is also connected with the second outgoing line isolating switch; the first outgoing line isolating switches of the two groups of combined electrical appliances are connected with each other, and the second outgoing line isolating switches of the two groups of combined electrical appliances are also connected with each other;

   the two groups of first outgoing line isolating switches and the two groups of second outgoing line isolating switches are connected through GIL pipelines;

   The GIL pipeline comprises a porcelain insulator sleeve and a connecting air chamber, wherein the connecting air chamber is fixed at the end part of the porcelain insulator sleeve, a sealing gasket is arranged between the connecting air chamber and the porcelain insulator sleeve, a plurality of groups of insulation adjusting and supporting mechanisms are arranged in the porcelain insulator sleeve, each insulation adjusting and supporting mechanism comprises an elastic sleeve and a spring fixed on the outer side wall, and the elastic sleeve is spiral;

   Only one spring is arranged on the same axial section of the elastic sleeve, the central angles clamped by every two adjacent springs along the axial direction of the elastic sleeve are equal, and the axial distance between every two adjacent springs along the axial direction of the elastic sleeve is also equal;

   Be equipped with the ply-yarn drill in the connection air chamber, the ply-yarn drill includes three stationary blades and three movable blades, stationary blade and movable blade interval set up and enclose into the annular, the ply-yarn drill includes top and bottom, the top is the wire entry end, the distance of stationary blade top to the ply-yarn drill central axis is greater than the distance of stationary blade bottom to the display card central axis, the middle part of movable blade is rotated through the pivot and is connected on two adjacent stationary blades, the upper portion of movable blade forms the obtuse angle with the lower part of movable blade, receives the lower part of stationary blade extrusion deformation back promotion movable blade after the wire inserts from the entry end, makes the upper portion of movable blade paste the wire.
2. 2. The HGIS double spacing annular bus assembly as recited in claim 1, wherein: when the lead is not inserted, the included angle between the upper part of the movable sheet and the section of the line clamping shaft is equal to the included angle between the fixed sheet and the section of the line clamping shaft, and the lower part of the movable sheet is parallel to the axis of the line clamping shaft.