CN109510161B - All-insulated tubular bus system - Google Patents
All-insulated tubular bus system Download PDFInfo
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- CN109510161B CN109510161B CN201811447527.3A CN201811447527A CN109510161B CN 109510161 B CN109510161 B CN 109510161B CN 201811447527 A CN201811447527 A CN 201811447527A CN 109510161 B CN109510161 B CN 109510161B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
- H02G15/188—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress connected to a cable shield only
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Abstract
The application relates to a high-voltage power system connecting piece, and provides a full-insulation tubular bus system, aiming at the problems that the grounding of the existing long full-insulation tubular bus system is unreliable and the full insulation of the tubular bus system is difficult to realize. The all-insulated tubular bus system comprises a plurality of sections of all-insulated tubular buses and at least two tubular bus connectors; the all-insulated tubular bus comprises a bus conductive tube and a bus insulating layer, and a bus outer shielding layer is arranged on the outer surface of the bus insulating layer; the special feature is that: the device also comprises at least two grounding wires; the end of the all-insulated tubular bus is assembled in the tubular bus connector, an inner shielding layer is arranged on the inner surface of the tubular bus connector, and the outer shielding layer of the all-insulated tubular bus is in shielding lap joint with the inner shielding layer of the tubular bus connector; the outside of the exposed section of the all-insulated tubular bus which is not assembled in the tubular bus connector is provided with a bus metal shielding layer, and the grounding wires are arranged on the bus metal shielding layer, so that a loop is not formed between any two grounding wires.
Description
Technical Field
The application relates to a high-voltage power system connecting piece, in particular to an all-insulation tubular bus system.
Background
In the power transmission and transformation system, the application of the all-insulated tubular bus is wider and wider, and when the single loop of the all-insulated tubular bus system required by the site is longer, the all-insulated tubular bus is generally formed by connecting a plurality of sections of all-insulated tubular buses through a connecting device. Chinese patent (application number 201320877490.4) discloses a connecting device, and this connecting device is including the insulating cover that is used for connecting the tubular busbar of full insulation, and insulating cover inside is provided with the electrically conductive cover, and insulating cover surface is provided with outer shielding layer, and insulating cover and the insulating complex port department of tubular busbar of full insulation are provided with the shielding layer respectively. The connecting device can conveniently and reliably realize the connection of the multi-section all-insulated tubular bus to form an all-insulated tubular bus system.
However, because the single-loop all-insulated tubular bus system used on site is too long, the traditional one-point grounding of the all-insulated tubular bus system is unreliable, and the floating potential is extremely easy to generate due to local grounding, so that the all-insulated tubular bus is broken down in insulation. If the different parts of the all-insulated tubular bus system are grounded in multiple points, circulation occurs on the outer shielding layer of the all-insulated tubular bus system due to the communication among the points, so that the outer shielding layer of the all-insulated tubular bus system locally heats in the operation process, the shielding reliability is affected, and the insulation performance of the all-insulated tubular bus system is reduced.
In addition, when the all-insulated buses of two adjacent sections in the existing bus system are connected, the two sections of buses are generally connected by adopting an insulating cylinder, insulation at the connecting part is also air-insulated, and as time goes on, moisture and water can infiltrate into the insulating cylinder to reduce the insulation performance and influence the safe operation of the system, so that the mode does not realize the true all-insulation.
Disclosure of Invention
The application aims to provide a full-insulation tubular bus system, which aims at solving the problems that the grounding of the existing long full-insulation tubular bus system is unreliable and the full insulation of the tubular bus system is difficult to realize.
In order to achieve the above object, the present application provides a fully insulated tubular busbar system, comprising a plurality of sections of fully insulated tubular busbars and at least two tubular busbar connectors; the all-insulated tubular bus comprises a bus conductive tube and a bus insulating layer, and a bus outer shielding layer is arranged on the outer surface of the bus insulating layer; the special feature is that: the device also comprises at least two grounding wires; the end of the all-insulated tubular bus is assembled in the tubular bus connector, an inner shielding layer is arranged on the inner surface of the tubular bus connector, and the outer shielding layer of the all-insulated tubular bus is in shielding lap joint with the inner shielding layer of the tubular bus connector; the all-insulated tubular bus is characterized in that a bus metal shielding layer is arranged on the outer side of a bare section which is not assembled in the tubular bus connecting piece, the grounding wires are arranged on the bus metal shielding layer, and a loop is not formed between any two grounding wires.
Further, the tubular busbar connector comprises an all-insulation intermediate joint; the all-insulation intermediate connector comprises a first conductive sleeve and a first insulation sleeve, wherein a first outer shielding layer is arranged on the outer surface of the first insulation sleeve, and a first metal shielding layer is arranged on the first outer shielding layer; only one end face of the first insulating sleeve is provided with an end face shielding layer; in two adjacent sections of all-insulated tubular buses, the end head of one of the all-insulated tubular buses is connected with one end of the first insulating sleeve, which is provided with an end face shielding layer, and the bus metal shielding layer of the all-insulated tubular bus is connected with the first metal shielding layer of the first insulating sleeve; the end of the other all-insulated tubular bus is connected with the other end of the first insulating sleeve, and the bus metal shielding layer of the other all-insulated tubular bus is connected with a grounding wire at the end face close to the first insulating sleeve; or, end face shielding layers are not arranged on the end faces of the two ends of the first insulating sleeve; two adjacent sections of all-insulated tubular buses are connected through a first insulating sleeve, wherein a bus metal shielding layer of one section of all-insulated tubular bus is connected with a grounding wire at the end face close to the first insulating sleeve; or the bus metal shielding layers of the two sections of all-insulated tubular buses are connected with the grounding wire at the end face close to the first insulating sleeve.
Further, an inner shielding layer is arranged on the inner surface of the first insulating sleeve, and the inner shielding layer comprises a first low-voltage end inner shielding layer; the first low-voltage end inner shielding layers are arranged at two ends of the first insulating sleeve through spraying or vulcanization; and the bus outer shielding layer of the end of the all-insulated tubular bus is connected with the first low-voltage end inner shielding layer of the all-insulated intermediate joint through lap joint.
Further, the tubular bus connector comprises an outer cone type all-insulation connector, wherein the outer cone type all-insulation connector is used for all-insulation connection between an all-insulation tubular bus and electrical equipment in an outer cone wire inlet and outlet mode; the outer cone type all-insulation connector comprises a second conductive sleeve and a second insulation sleeve, wherein a second outer shielding layer is arranged on the outer surface of the second insulation sleeve, and end surface shielding layers are not arranged on the end surfaces of two ends of the second insulation sleeve;
the end of the all-insulated tubular bus is connected with the second insulating sleeve, and the bus metal shielding layer of the all-insulated tubular bus is connected with the grounding wire at the end face close to the second insulating sleeve.
Further, an inner shielding layer is arranged on the inner surface of the second insulating sleeve, and the inner shielding layer comprises a second low-voltage end inner shielding layer; the second low-voltage end inner shielding layer is arranged at one end of the second insulating sleeve, which is connected with the all-insulated tubular bus, through spraying or vulcanization; and the bus outer shielding layer of the all-insulated tubular bus end is connected with the second low-voltage end inner shielding layer of the outer cone-shaped all-insulated connector through lap joint.
Further, the tubular busbar connector comprises a cold shrinkage terminal, wherein the cold shrinkage terminal is used for open connection of the all-insulated tubular busbar and the electrical equipment; the cold shrink terminal comprises a third insulating sleeve, and end face shielding layers are not arranged on the end faces of the two ends of the third insulating sleeve; the third insulating sleeve is sleeved on the all-insulating tubular bus, and the bus metal shielding layer of the all-insulating tubular bus is connected with the grounding wire at the end face close to the third insulating sleeve.
Further, a third low-voltage end inner shielding layer is arranged on the inner surface of the third insulating sleeve; and the bus outer shielding layer of the end of the all-insulated tubular bus is connected with the third low-voltage end inner shielding layer of the cold shrink terminal through lap joint.
Further, the tubular bus connector comprises an inner cone type all-insulation connector, wherein the inner cone type all-insulation connector is used for all-insulation connection between an all-insulation tubular bus and electrical equipment in an inner cone wire inlet and outlet mode; the inner cone type all-insulation connector comprises a fourth conductive sleeve and a fourth insulation sleeve; end face shielding layers are not arranged on the end faces of the two ends of the fourth insulating sleeve; the end of the all-insulated tubular bus is connected with the fourth insulating sleeve, and the bus metal shielding layer is connected with the grounding wire at the end face close to the fourth insulating sleeve.
Further, a fourth low-voltage end inner shielding layer is arranged on the inner surface of the fourth insulating sleeve; the fourth low-voltage end inner shielding layer is arranged at one end of the fourth insulating sleeve, which is connected with the all-insulated tubular bus, through spraying or vulcanization; and the bus outer shielding layer of the all-insulated tubular bus end is connected with the fourth low-voltage end inner shielding layer of the inner cone type all-insulated connector through lap joint.
Further, the thicknesses of the first low-voltage end inner shielding layer, the second low-voltage end inner shielding layer, the third low-voltage end inner shielding layer and the fourth low-voltage end inner shielding layer are 0.1-8 mm, and the resistance value is less than or equal to 50KΩ. The inner surface of the insulating sleeve is sprayed or vulcanized with the inner shielding layer at the low-voltage end, so that an original bus extrusion processing mode is replaced, an inclined plane is not required to be processed at the end part of the bus, and the problems of partial discharge caused by the formation of an air gap due to the occurrence of steps at the lap joint part of the straight end face are avoided.
Further, the thicknesses of the first low-voltage end inner shielding layer, the second low-voltage end inner shielding layer, the third low-voltage end inner shielding layer and the fourth low-voltage end inner shielding layer are 3-6 mm, and the resistance is 1KΩ -10 KΩ. The shielding effect is best in this range, and the manufacturing cost is optimal.
Further, the thickness of the bus bar outer shielding layer is 0.1-0.5 mm, and the resistance of the lap joint parts of the bus bar outer shielding layer, the first low-voltage end inner shielding layer, the second low-voltage end inner shielding layer, the third low-voltage end inner shielding layer and the fourth low-voltage end inner shielding layer corresponds to the resistance of the first low-voltage end inner shielding layer, the second low-voltage end inner shielding layer, the third low-voltage end inner shielding layer and the fourth low-voltage end inner shielding layer.
Compared with the prior art, the application has the advantages that:
1. in the all-insulated tubular bus system, the key of the grounding mode is that an end surface shielding layer is not arranged at one end part or two end parts of an insulating sleeve, disconnection points are formed, the disconnection points are respectively grounded in a plurality of sections, and each section of grounding is insulated from each other and is not communicated with each other, so that the reliability of shielding grounding is ensured.
2. The low-voltage end inner shielding layer is arranged on the insulating sleeve through spraying or vulcanization, and the lap joint is adopted to connect the low-voltage end inner shielding layer and the bus outer shielding layer, so that an inclined plane does not need to be processed at the end part of the bus, the problem of partial discharge caused by the formation of an air gap due to the occurrence of a step at the lap joint of the straight end surface is avoided, and a better inner shielding effect can be achieved.
Drawings
FIG. 1 is a schematic view of a first embodiment of an all-insulated tubular bus system of the present application;
FIG. 2 is an enlarged view of a portion of the embodiment of FIG. 1;
FIG. 3 is a schematic view of a second embodiment of an all-insulated tubular bus system of the present application;
FIG. 4 is a schematic view of a third embodiment of an all-insulated tubular bus system of the present application;
FIG. 5 is a schematic view of a fourth embodiment of an all-insulated tubular bus system of the present application;
FIG. 6 is a schematic view of a fifth embodiment of an all-insulated tubular bus system of the present application;
FIG. 7 is an enlarged view of a portion of the embodiment of FIG. 6;
fig. 8 is a schematic structural view of a sixth embodiment of an all-insulated tubular busbar system according to the present application.
The reference numerals in the drawings are as follows:
0-a ground wire;
1-a fully insulated tubular busbar; 11-bus conductive tube, 12-bus insulating layer, 13-bus outer shielding layer and 14-bus metal shielding layer;
2-a fully insulated intermediate joint;
21-a first conductive sleeve, 22-a first insulating sleeve, 23-a first outer shielding layer, 24-a first metal shielding layer, 25-an end surface shielding layer, 26-a first high-voltage end inner shielding layer and 27-a first low-voltage end inner shielding layer;
3-an outer cone type all-insulation connector;
31-second conductive sleeve, 32-second insulating sleeve, 33-second outer shielding layer, 34-second low voltage end inner shielding layer;
4-a cold shrink terminal; 41-a third insulating sleeve and 42-a third low-voltage end inner shielding layer;
5-an inner cone type all-insulation connector; 51-fourth conductive sleeve, 52-fourth insulating sleeve, 53-fourth low voltage end inner shielding layer;
6-branch joint; 7-a fully shielded plug-in arrester;
8-a first all-insulated tubular bus and 9-a second all-insulated tubular bus;
10-test gas box.
Detailed Description
The application is described in further detail below with reference to the drawings and examples.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a fully insulated tubular bus system, which includes a fully insulated intermediate joint 2 and a multi-section fully insulated tubular bus 1.
The fully insulated intermediate connector 2 comprises a first conductive sleeve 21 and a first insulating sleeve 22.
The inner surface of the first insulating sleeve 22 is provided with an inner shielding layer which comprises a first high-voltage end inner shielding layer 26 and a first low-voltage end inner shielding layer 27; the first low-voltage end inner shielding layers 27 are arranged at the two ends of the first insulating sleeve 22 through spraying or vulcanization; the thickness of the first low-voltage end inner shielding layer 27 is 0.1-8 mm, the resistance value is less than or equal to 50KΩ, the thickness is preferably 3-6 mm, and the resistance value is 1KΩ -10 KΩ. The first high-voltage side inner shield layer 26 is located in the middle of the first insulating sheath 22 and has a length longer than that of the first conductive sheath 21.
The outer surface of the first insulating sleeve 22 is provided with a first outer shielding layer 23, and the first outer shielding layer 23 is made of semiconductive rubber sprayed or vulcanized on the outer circumference of the first insulating sleeve 22; an end face shielding layer 25 is arranged on one end face of the first insulating sleeve 22, and the end face shielding layer 25 is not arranged on the other end face; the end face shielding layer 25 is a semiconductive rubber sprayed or vulcanized on the end face of the first insulating sleeve 22. A first metal shield 24 made of a cylindrical copper mesh is provided on the first outer shield 23 of the first insulating sheath 22.
The all-insulated tubular bus bar 1 includes a bus bar conductive tube 11 and a bus bar insulating layer 12. The outer surface of the bus insulating layer 12 is provided with a bus outer shielding layer 13; the outer circumference of the busbar outer shield 13 is provided with a busbar metal shield 14 made of a cylindrical copper mesh.
In two adjacent sections of all-insulated tubular buses 1, the end of one of the all-insulated tubular buses 1 is connected with one end of the first insulating sleeve 22 provided with an end surface shielding layer 25, and the bus metal shielding layer 14 of the all-insulated tubular bus 1 is connected with the first metal shielding layer 24 of the first insulating sleeve 22 through a clamping ring;
the end of the other all-insulated tubular busbar 1 is connected with the other end of the first insulating sleeve 22, and the end face of the busbar metal shielding layer 14 close to the first insulating sleeve 22 is connected with the grounding wire 0 through a constant force snap ring.
The all-insulated tubular busbar system provided by the embodiment not only can ensure effective shielding of electric field stress, but also can realize shielding disconnection, so that the semiconducting layer of the whole loop of the all-insulated tubular busbar system is truly divided into a plurality of sections for multipoint grounding; the surface zero potential touchable function of the high-voltage and high-current all-insulated tubular bus is guaranteed to be reliably realized.
In addition, at the connection position of the end of the all-insulated tubular bus 1 and the all-insulated intermediate joint 2, the bus outer shielding layer 13 of the end of the all-insulated tubular bus is connected with the first low-voltage end inner shielding layer 27 of the all-insulated intermediate joint 2 through lap joint.
The thickness of the bus bar outer shielding layer 13 is 0.1 to 0.5mm, and the resistance value of the lap joint part of the bus bar outer shielding layer and the first low-voltage end inner shielding layer 27 corresponds to the resistance value of the first low-voltage end inner shielding layer 27. Namely, when the resistance value of the first low-voltage end inner shielding layer 27 is less than or equal to 50KΩ, the resistance value of the lap joint part of the bus outer shielding layer 13 and the first low-voltage end inner shielding layer 27 is correspondingly less than or equal to 50KΩ; when the resistance of the first low-voltage end inner shielding layer 27 is 1kΩ to 10kΩ, the resistance of the overlapping portion of the bus bar outer shielding layer 13 and the first low-voltage end inner shielding layer 27 is 1kΩ to 10kΩ.
The first low-voltage end inner shielding layer 27 is arranged on the first insulating sleeve 22 through spraying or vulcanizing, and the first low-voltage end inner shielding layer 27 and the bus outer shielding layer 13 are connected in a lap joint mode, so that an inclined plane does not need to be processed at the end portion of the bus, the problem that steps occur at the lap joint position of the straight end face to form an air gap and cause partial discharge is avoided, and a good inner shielding effect can be achieved.
Example two
As shown in fig. 3, the present embodiment provides a fully insulated tubular bus system, which includes a fully insulated tubular bus 1 and an outer cone type fully insulated connector 3; the outer cone type all-insulated connector 3 is used for all-insulated connection of the all-insulated tubular bus 1 and electrical equipment in an outer cone wire inlet and outlet mode.
The all-insulated tubular bus 1 comprises a bus conductive tube 11 and a bus insulating layer 12, wherein a bus outer shielding layer 13 is arranged on the outer surface of the bus insulating layer 12, and a bus metal shielding layer 14 is arranged on the outer side of the bus outer shielding layer 13.
The outer cone type all-insulated connector 3 comprises a second conductive sleeve 31 and a second insulating sleeve 32, a second outer shielding layer 33 is arranged on the outer surface of the second insulating sleeve 32, and end surface shielding layers are not arranged on the end surfaces of two ends of the second insulating sleeve 32;
the end of the all-insulated tubular busbar 1 is connected to the second insulating sheath 32, and the busbar metallic shield 14 is connected to the ground line 0 at the end face close to the second insulating sheath 32.
The inner surface of the second insulating sleeve 32 is provided with an inner shielding layer which comprises a second low voltage end inner shielding layer 34; the second low-voltage end inner shielding layer 34 is arranged at one end of the second insulating sleeve 32 connected with the all-insulated tubular bus 1 through spraying or vulcanization; the bus outer shielding layer 13 at the end of the all-insulated tubular bus 1 is connected with the second low-voltage end inner shielding layer 34 of the outer cone-shaped all-insulated connector 3 through lap joint.
The thickness of the second low-voltage end inner shielding layer 34 is 0.1-8 mm, and the resistance value is less than or equal to 50KΩ; the thickness of the second low-voltage side inner shield layer 34 is preferably 3 to 6mm, and the resistance is preferably 1KΩ to 10KΩ. The thickness of the bus bar outer shielding layer 13 is 0.1-0.5 mm, and the resistance value of the lap joint part of the bus bar outer shielding layer and the second low-voltage end inner shielding layer 34 corresponds to the resistance value of the second low-voltage end inner shielding layer 34.
Example III
As shown in fig. 4, the present embodiment provides a full-insulation tubular bus system including a full-insulation tubular bus 1 and a cold shrink terminal 4; the cold shrink terminal 4 is used for the open connection of the all-insulated tubular busbar 1 and the electrical equipment.
The all-insulated tubular bus 1 comprises a bus conductive tube 11 and a bus insulating layer 12, wherein a bus outer shielding layer 13 is arranged on the outer surface of the bus insulating layer 12, and a bus metal shielding layer 14 is arranged on the outer side of the bus outer shielding layer 13.
The cold shrink terminal 4 comprises a third insulating sleeve 41, and end face shielding layers are not arranged on the end faces of two ends of the third insulating sleeve 41; the third insulating bush 41 is fitted over the all-insulated tubular bus 1, and the bus metal shield 14 of the all-insulated tubular bus 1 is connected to the ground line 0 at an end face close to the third insulating bush 41.
The inner surface of the third insulating sleeve 41 is provided with a third low-voltage end inner shielding layer 42; the bus outer shielding layer 13 at the end of the all-insulated tubular bus 1 is connected with the third low-voltage end inner shielding layer 42 of the cold shrink terminal 4 through lap joint.
The thickness of the third low-voltage end inner shielding layer 42 is 0.1-8 mm, and the resistance value is less than or equal to 50KΩ; the thickness of the third low-voltage side inner shield layer 42 is preferably 3 to 6mm, and the resistance is preferably 1KΩ to 10KΩ. The thickness of the bus bar outer shielding layer 13 is 0.1 to 0.5mm, and the resistance value of the lap joint part of the bus bar outer shielding layer and the third low voltage end inner shielding layer 42 corresponds to the resistance value of the third low voltage end inner shielding layer 42.
Example IV
As shown in fig. 5, the present embodiment provides a fully insulated tubular bus system, which includes a fully insulated tubular bus 1 and an inner cone fully insulated connector 5, wherein the inner cone fully insulated connector 5 is used for fully insulating connection between the fully insulated tubular bus 1 and an electrical device in an inner cone wire-in and wire-out mode.
The all-insulated tubular bus 1 comprises a bus conductive tube 11 and a bus insulating layer 12, wherein a bus outer shielding layer 13 is arranged on the outer surface of the bus insulating layer 12, and a bus metal shielding layer 14 is arranged on the outer side of the bus outer shielding layer 13.
The inner cone type all-insulated connector 5 comprises a fourth conductive sleeve 51 and a fourth insulating sleeve 52; end face shielding layers are not arranged on the end faces of the two ends of the fourth insulating sleeve 52; the end of the all-insulated tubular busbar 1 is connected to the fourth insulating sheath 52, and the busbar metallic shield 14 is connected to the ground line 0 at the end face close to the fourth insulating sheath 52.
A fourth low-voltage end inner shielding layer 53 is arranged on the inner surface of the fourth insulating sleeve 52; the fourth low-voltage end inner shielding layer 53 is arranged at one end of the fourth insulating sleeve 52 connected with the all-insulated tubular bus 1 through spraying or vulcanization; the bus outer shielding layer 13 at the end of the all-insulated tubular bus 1 is connected with the fourth low-voltage end inner shielding layer 53 of the inner cone-shaped all-insulated connector 5 through lap joint.
The thickness of the fourth low-voltage end inner shielding layer 53 is 0.1-8 mm, and the resistance value is less than or equal to 50KΩ; the thickness of the fourth low-voltage side inner shield layer 53 is preferably 3 to 6mm, and the resistance is preferably 1KΩ to 10KΩ. The thickness of the bus bar outer shielding layer 13 is 0.1-0.5 mm, and the resistance value of the lap joint part of the bus bar outer shielding layer and the fourth low-voltage end inner shielding layer 53 corresponds to the resistance value of the fourth low-voltage end inner shielding layer 53.
Example five
As shown in fig. 6 and 7, the present embodiment provides a fully insulated tubular busbar system including a fully insulated intermediate joint 2, a branch joint 6, and a multi-segment fully insulated tubular busbar 1.
The branch joint 6 is of a three-way structure, three bus connecting ends of the branch joint are respectively connected with all-insulated tubular buses 1 with different aperture sizes, and meanwhile, the branch joint 6 is connected with a full-shielding plug-in arrester 7 through an inner cone connecting port of the branch joint; the butt joint of three all-insulated tubular buses 1 and a full-shielding plug-in lightning arrester 7 can be realized.
The fully insulated intermediate connector 2 is similar in construction and use to the first embodiment; it should be noted that, in the plurality of all-insulated intermediate connectors 2 arranged relative to the all-shielded pluggable lightning arrester 7, in order to ensure that each section of all-insulated tubular bus 1 is grounded, the positions of the all-insulated intermediate connectors 2 where the grounding wires 0 are arranged should be kept consistent on the same side, and operators can flexibly set the all-insulated intermediate connectors according to actual requirements of the site in the actual installation process.
Example six
As shown in fig. 8, the present embodiment provides a full-insulated tubular bus system including a first full-insulated tubular bus 8, a second full-insulated tubular bus 9, a full-insulated intermediate joint 2 as in example 1, a cold-shrink terminal 4 as in example 3, and an inner-cone full-insulated joint 5 as in example 4.
The first all-insulated tubular bus bar 8 and the second all-insulated tubular bus bar 9 are connected by an all-insulated intermediate joint 2, and the second all-insulated tubular bus bar 9 is connected to the ground line in the manner of example 1. The tail end of the first all-insulated tubular busbar 8 is connected with an inner cone type all-insulated connector 5, and the inner cone type all-insulated connector 5 is arranged in a test gas tank filled with SF6 or transformer oil; the cold shrink terminal 4 is sleeved on the second all-insulated tubular busbar 9.
The 40.5kV all-insulated tubular bus system designed according to the embodiment is tested by selecting different bus system parameters, and the test results are as follows:
from the above table, it can be seen that the all-insulated tubular bus system according to the parameters of the bus system of the present application can have excellent all-insulated performance through various test requirements.
The above examples are merely illustrative of preferred embodiments of the present application, and the technical solutions of the present application are not limited thereto, and any known modifications may be made by those skilled in the art on the basis of the main technical concept of the present application, which falls within the technical scope of the present application.
Claims (21)
1. An all-insulated tubular bus system comprises a plurality of sections of all-insulated tubular buses (1) and at least two tubular bus connectors; the all-insulated tubular bus (1) comprises a bus conductive tube (11) and a bus insulating layer (12), wherein a bus outer shielding layer (13) is arranged on the outer surface of the bus insulating layer (12);
the method is characterized in that: also comprises at least two grounding wires (0);
the end of the all-insulated tubular bus (1) is assembled in the tubular bus connector, an inner shielding layer is arranged on the inner surface of the tubular bus connector, and the outer shielding layer of the all-insulated tubular bus (1) is in shielding lap joint with the inner shielding layer of the tubular bus connector;
the all-insulated tubular bus (1) is not assembled outside the exposed section in the tubular bus connector, a bus metal shielding layer (14) is arranged outside the exposed section, the grounding wires (0) are arranged on the bus metal shielding layer (14), and a loop is not formed between any two grounding wires (0).
2. The all-insulated tubular bus system of claim 1, wherein:
the tubular bus connector comprises an all-insulation intermediate joint (2);
the all-insulation intermediate joint (2) comprises a first conductive sleeve (21) and a first insulation sleeve (22), wherein a first outer shielding layer (23) is arranged on the outer surface of the first insulation sleeve (22), and a first metal shielding layer (24) is arranged on the first outer shielding layer (23);
only one end face of the first insulating sleeve (22) is provided with an end face shielding layer (25);
in two adjacent sections of all-insulated tubular buses (1), the end head of one of the all-insulated tubular buses (1) is connected with one end of a first insulating sleeve (22) provided with an end face shielding layer (25), and a bus metal shielding layer (14) of the all-insulated tubular bus (1) is connected with a first metal shielding layer (24) of the first insulating sleeve (22);
the end head of the other all-insulated tubular bus (1) is connected with the other end of the first insulating sleeve (22), and the bus metal shielding layer (14) is connected with the grounding wire (0) at the end face close to the first insulating sleeve (22);
or alternatively, the process may be performed,
end face shielding layers are not arranged on the end faces of the two ends of the first insulating sleeve (22);
two adjacent sections of all-insulated tubular buses (1) are connected through a first insulating sleeve (22), wherein a bus metal shielding layer (14) of one section of all-insulated tubular bus (1) is connected with a grounding wire (0) at the end face close to the first insulating sleeve (22); or the bus metal shielding layers (14) of the two sections of all-insulated tubular buses (1) are connected with the grounding wire (0) at the end surfaces close to the first insulating sleeve (22).
3. An all-insulated tubular bus system as set forth in claim 2, wherein:
an inner shielding layer is arranged on the inner surface of the first insulating sleeve (22), and comprises a first low-voltage end inner shielding layer (27);
the first low-voltage end inner shielding layers (27) are arranged at the two ends of the first insulating sleeve (22) through spraying or vulcanizing;
the bus outer shielding layer (13) at the end of the all-insulated tubular bus (1) is connected with the first low-voltage end inner shielding layer (27) of the all-insulated intermediate joint (2) through lap joint.
4. A fully insulated tubular busbar system according to claim 3, wherein: the thickness of the first low-voltage end inner shielding layer (27) is 0.1-8 mm, and the resistance value is less than or equal to 50KΩ.
5. The all-insulated tubular bus system of claim 4, wherein: the thickness of the first low-voltage end inner shielding layer (27) is 3-6 mm, and the resistance is 1KΩ -10 KΩ.
6. The all-insulated tubular bus system of claim 5, wherein: the thickness of the bus outer shielding layer (13) is 0.1-0.5 mm, and the resistance value of the lap joint part of the bus outer shielding layer and the first low-voltage end inner shielding layer (27) corresponds to the resistance value of the first low-voltage end inner shielding layer (27).
7. The all-insulated tubular bus system of claim 1, wherein:
the tubular bus connector comprises an outer cone type all-insulation connector (3), wherein the outer cone type all-insulation connector (3) is used for all-insulation connection between an all-insulation tubular bus (1) and electrical equipment in an outer cone wire inlet and outlet mode;
the outer cone type all-insulation connector (3) comprises a second conductive sleeve (31) and a second insulation sleeve (32), a second outer shielding layer (33) is arranged on the outer surface of the second insulation sleeve (32),
end face shielding layers are not arranged on the end faces of the two ends of the second insulating sleeve (32);
the end of the all-insulated tubular bus (1) is connected with a second insulating sleeve (32), and the bus metal shielding layer (14) is connected with a grounding wire (0) at the end face close to the second insulating sleeve (32).
8. The all-insulated tubular bus system of claim 7, wherein:
an inner shielding layer is arranged on the inner surface of the second insulating sleeve (32), and comprises a second low-voltage end inner shielding layer (34);
the second low-voltage end inner shielding layer (34) is arranged at one end of the second insulating sleeve (32) connected with the all-insulated tubular bus (1) through spraying or vulcanizing;
the bus outer shielding layer (13) at the end of the all-insulated tubular bus (1) is connected with the second low-voltage end inner shielding layer (34) of the outer cone-shaped all-insulated connector (3) through lap joint.
9. The all-insulated tubular bus system of claim 8, wherein: the thickness of the second low-voltage end inner shielding layer (34) is 0.1-8 mm, and the resistance value is less than or equal to 50KΩ.
10. The all-insulated tubular bus system of claim 9, wherein: the thickness of the second low-voltage end inner shielding layer (34) is 3-6 mm, and the resistance is 1KΩ -10 KΩ.
11. The all-insulated tubular bus system of claim 10, wherein: the thickness of the bus outer shielding layer (13) is 0.1-0.5 mm, and the resistance value of the lap joint part of the bus outer shielding layer and the second low-voltage end inner shielding layer (34) corresponds to the resistance value of the second low-voltage end inner shielding layer (34).
12. The all-insulated tubular bus system of claim 1, wherein:
the tubular busbar connector comprises a cold shrinkage terminal (4), wherein the cold shrinkage terminal (4) is used for open connection of the all-insulated tubular busbar (1) and electrical equipment;
the cold shrink terminal (4) comprises a third insulating sleeve (41),
end face shielding layers are not arranged on the end faces of the two ends of the third insulating sleeve (41);
the third insulating sleeve (41) is sleeved on the all-insulating tubular bus (1), and the bus metal shielding layer (14) of the all-insulating tubular bus (1) is connected with the grounding wire (0) at the end face close to the third insulating sleeve (41).
13. The all-insulated tubular bus system of claim 12, wherein: a third low-voltage end inner shielding layer (42) is arranged on the inner surface of the third insulating sleeve (41);
the bus outer shielding layer (13) at the end of the all-insulated tubular bus (1) is connected with the third low-voltage end inner shielding layer (42) of the cold shrinkage terminal (4) through lap joint.
14. The all-insulated tubular bus system of claim 13, wherein: the thickness of the third low-voltage end inner shielding layer (42) is 0.1-8 mm, and the resistance value is less than or equal to 50KΩ.
15. The all-insulated tubular bus system of claim 14, wherein: the thickness of the third low-voltage end inner shielding layer (42) is 3-6 mm, and the resistance is 1KΩ -10 KΩ.
16. The all-insulated tubular bus system of claim 15, wherein: the thickness of the bus outer shielding layer (13) is 0.1-0.5 mm, and the resistance value of the lap joint part of the bus outer shielding layer and the third low-voltage end inner shielding layer (42) corresponds to the resistance value of the third low-voltage end inner shielding layer (42).
17. The all-insulated tubular bus system of claim 1, wherein:
the tubular bus connector comprises an inner cone type all-insulation connector (5), and the inner cone type all-insulation connector (5) is used for all-insulation connection between the all-insulation tubular bus (1) and electrical equipment in an inner cone wire inlet and outlet mode;
the inner cone type all-insulation connector (5) comprises a fourth conductive sleeve (51) and a fourth insulation sleeve (52);
end face shielding layers are not arranged on the end faces of the two ends of the fourth insulating sleeve (52);
the end of the all-insulated tubular bus (1) is connected with a fourth insulating sleeve (52), and the bus metal shielding layer (14) is connected with a grounding wire (0) at the end face close to the fourth insulating sleeve (52).
18. The all-insulated tubular bus system of claim 17, wherein:
a fourth low-voltage end inner shielding layer (53) is arranged on the inner surface of the fourth insulating sleeve (52);
the fourth low-voltage end inner shielding layer (53) is arranged at one end of the fourth insulating sleeve (52) connected with the all-insulating tubular bus (1) through spraying or vulcanizing;
the bus outer shielding layer (13) at the end of the all-insulated tubular bus (1) is connected with the fourth low-voltage end inner shielding layer (53) of the inner cone-shaped all-insulated connector (5) through lap joint.
19. The all-insulated tubular bus system of claim 18, wherein: the thickness of the fourth low-voltage end inner shielding layer (53) is 0.1-8 mm, and the resistance value is less than or equal to 50KΩ.
20. The all-insulated tubular bus system of claim 19, wherein: the thickness of the fourth low-voltage end inner shielding layer (53) is 3-6 mm, and the resistance is 1KΩ -10 KΩ.
21. The all-insulated tubular bus system of claim 20, wherein: the thickness of the bus outer shielding layer (13) is 0.1-0.5 mm, and the resistance value of the lap joint part of the bus outer shielding layer and the fourth low-voltage end inner shielding layer (53) corresponds to the resistance value of the fourth low-voltage end inner shielding layer (53).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811447527.3A CN109510161B (en) | 2018-11-29 | 2018-11-29 | All-insulated tubular bus system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447527.3A CN109510161B (en) | 2018-11-29 | 2018-11-29 | All-insulated tubular bus system |
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| CN109510161A CN109510161A (en) | 2019-03-22 |
| CN109510161B true CN109510161B (en) | 2023-08-25 |
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| CN201811447527.3A Active CN109510161B (en) | 2018-11-29 | 2018-11-29 | All-insulated tubular bus system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110247206A (en) * | 2019-05-07 | 2019-09-17 | 山东泰开电缆有限公司 | Attachment device for insulating tube type busbar end |
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| CN109510161A (en) | 2019-03-22 |
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