CN102361301B

CN102361301B - Asymmetrical V-shaped insulator string array structure of rigid jumper wire of power transmission line

Info

Publication number: CN102361301B
Application number: CN 201110250019
Authority: CN
Inventors: 张家倩
Original assignee: ANHUI ELECTRIC POWER DESIGN INSTITUTE
Current assignee: China Energy Engineering Group Anhui Electric Power Design Institute Co Ltd
Priority date: 2011-08-26
Filing date: 2011-08-26
Publication date: 2013-08-28
Anticipated expiration: 2031-08-26
Also published as: CN102361301A

Abstract

The invention discloses an asymmetrical V-shaped insulator string array structure of a rigid jumper wire of a power transmission line. Electrified ends of strain insulator strings at two sides of the line are communicated by using the rigid jumper wire through a jumper wire lead. The asymmetrical V-shaped insulator string array structure is characterized in that three jumper wire insulator strings are adopted to form an asymmetrical suspension structure. The asymmetrical V-shaped insulator string array structure disclosed by the invention is applied to a rigid jumper wire of a strain pole tower of a super-voltage and extra-high voltage power transmission line; the array mode of a jumper wire system is simplified; the consumption of materials for producing the pole tower and the insulator is saved; meanwhile, the rigid jumper wire is limited so as to limit windage yaw of the jumper wire and avoid discharge accidents caused by over-great windage yaw.

Description

The asymmetric V-type insulator string of transmission line rigid jumper arrangement

Technical field

The present invention relates to a kind of suspension type of the rigid jumper system for the power line tension shaft tower.

Background technology

Rigid jumper is mainly used on superhigh pressure and the UHV transmission line strain insulator shaft tower, has duplex I type insulator string to dangle usually to arrange and the duplex V-type insulator string two kinds of forms of layout of dangling.

When adopting duplex I type insulator string to arrange, under static state, the inboard wire jumper of corner is unfavorable for that away from body of the tower ground wire is to the lightning protection of wire jumper; Under the effect of wind load, the windage yaw swing will take place in rigid jumper, and under the strong wind operating mode, corner outside rigid jumper near body of the tower the flashover discharge takes place easily.

The windage yaw flashover is avoided in the position that the mode that duplex V-type insulator string layout is arranged with respect to duplex I type insulator string can limit rigid jumper.Shown in Fig. 1 a, Fig. 1 b and Fig. 1 c, rigid jumper 5 is communicated with by wire jumper lead-in wire 6 live ends with circuit both sides strain insulator string 7, in the arrangement of duplex V-type insulator string, adopt four string wire jumper insulator strings 1 symmetrical V-shaped structure in twos on perpendicular to line direction, two groups of V-structures are be arrangeding in parallel along line direction, in order to guarantee two groups of spacings between the V-structure, need also namely along line direction little cross-arm 4 be set in the outer end of body of the tower 2 and shaft tower cross-arm 3 respectively at the hanging point place of V-type insulator string.This form has increased the complexity of tower structure, also causes the increase of shaft tower material usage simultaneously.In addition, the wire jumper system adopts four insulator strings to hang, and the consumption of insulator and gold utensil is more, has increased investment.

Summary of the invention

The present invention is for avoiding above-mentioned existing in prior technology weak point, the asymmetric V-type wire jumper of a kind of transmission line rigid jumper insulator string arrangement is provided, be applied to superhigh pressure and UHV transmission line strain insulator shaft tower rigid jumper, in the hope of simplifying the arrangement of wire jumper system, save shaft tower and insulator material usage, simultaneously rigid jumper is carried out spacingly, with restriction wire jumper windage yaw, avoid the discharge accident that causes because windage yaw is excessive.

The present invention adopts following technical scheme for the technical solution problem:

The asymmetric V-type insulator string of transmission line rigid jumper of the present invention arrangement, rigid jumper is communicated with by the live end of wire jumper lead-in wire with circuit both sides strain insulator string, and its design feature is: adopt three wire jumper insulator strings to form the asymmetry suspended structure;

Being set to of described asymmetry suspended structure: wherein list upper end of propping up side wire jumper insulator string is fixed on the link position place of shaft tower cross-arm and body of the tower, and the lower end is fixed on the point midway place of rigid jumper; The upper end of other two two side wire jumper insulator strings is separately fixed at shaft tower cross-arm end along on two hanging points of line direction, and the lower end is separately fixed at the both sides of rigid jumper, and described two two side wire jumper insulator strings are parallel each other or are " eight " shape;

The setting of described asymmetry suspended structure or be: wherein list upper end of propping up side wire jumper insulator string is fixed on the outer end of shaft tower cross-arm, and the lower end is fixed on the point midway place of rigid jumper; The upper end of other two two side wire jumper insulator strings is separately fixed on suitable two hanging points of line direction of shaft tower cross-arm and body of the tower junction, the lower end is separately fixed at the both sides of rigid jumper, and described two two side wire jumper insulator strings are parallel each other or are " eight " shape.

Compared with the prior art, beneficial effect of the present invention is embodied in:

1, the present invention has kept double V-shaped structure in restriction rigid jumper position, avoids windage yaw flashover discharge aspect than two I type structural advantages, has also kept under the situation of identical ground wire cross-arm length simultaneously, and ground wire is to the less advantage in lead lightning protection angle.

2, the present invention under the prerequisite of the structural stability that does not reduce the wire jumper system, has simplified the arrangement of wire jumper system than existing double V-shaped structure, has reduced the usage quantity of wire jumper insulator string and gold utensil.

3, the present invention has cancelled the little cross-arm of shaft tower body of the tower and cross-arm end than existing double V-shaped structure, and the shaft tower cross-arm can be designed to Duckbill type, has simplified the structure of shaft tower cross-arm, has reduced the shaft tower rolled steel dosage simultaneously.

4, the present invention is than existing double V-shaped structure, and the shaft tower cross-arm is simple in structure, and wire jumper system material consumption reduces few, has reduced the construction and installation workload.

5, the present invention can use the wire jumper insulator string of different materials such as porcelain, glass or synthetic insulating material applicable to the rigid jumper of different types such as mouse-cage type, aluminum pipe type.

6, two two side wire jumper insulator strings of the present invention can be applicable to the cross-arm width of different strain insulator shaft towers and the coupling of rigid jumper length by the size of " eight " word opening is adjusted.

Description of drawings

Fig. 1 a is that double V-shaped layout master looks schematic diagram in the prior art;

Fig. 1 b is the schematic side view of scheme shown in Fig. 1 a;

Fig. 1 c is the schematic top plan view of scheme shown in Fig. 1 a;

Fig. 2 a is the main schematic diagram of looking of the present invention;

Fig. 2 b is the schematic side view of scheme shown in Fig. 2 a;

Fig. 2 c is the schematic top plan view of scheme shown in Fig. 2 a;

Fig. 2 d is the schematic top plan view of another execution mode of the present invention;

Number in the figure: 1 wire jumper insulator string; 2 bodies of the tower; 3 shaft tower cross-arms; 4 little cross-arms; 5 rigid jumpers; 6 wire jumpers lead-in wire; 7 strain insulator strings; 8 single side wire jumper insulator strings; 9 pairs side wire jumper insulator strings.

Embodiment

Embodiment 1:

The asymmetric V-type insulator string of transmission line rigid jumper arrangement is in the present embodiment: in the usual way, rigid jumper 5 is communicated with by wire jumper lead-in wire 6 live ends with circuit both sides strain insulator string 7, and the prior art difference is in the present embodiment: adopt three wire jumper insulator strings to form the asymmetry suspended structure.

Referring to Fig. 2 a, Fig. 2 b and Fig. 2 c, being set to of asymmetry suspended structure: wherein list upper end of propping up side wire jumper insulator string 8 is fixed on the link position central spot of shaft tower cross bar 3 and body of the tower 2, and the lower end is fixed on the point midway place of rigid jumper 5; The upper end of other two two side wire jumper insulator strings 9 is separately fixed at the end of shaft tower cross-arm 3 along on two hanging points of line direction, and the lower end is separately fixed at the both sides of rigid jumper 5, and two outside insulator strings 9 are parallel each other or are " eight " shape.

Embodiment 2:

Identical with embodiment 1 is: present embodiment is communicated with by wire jumper lead-in wire 6 live ends with circuit both sides strain insulator string 7 for rigid jumper 5 in the usual way, present embodiment and embodiment 1 difference are that the asymmetry suspended structure that three wire jumper insulator strings are formed is shown in Fig. 2 d, wherein list upper end of propping up side wire jumper insulator string 8 is fixed on the central spot of the outer end of shaft tower cross-arm 3, and the lower end is fixed on the point midway place of rigid jumper 5; The upper end of other two two side wire jumper insulator strings 9 is separately fixed on suitable two hanging points of line direction of shaft tower cross-arm 3 and body of the tower junction, the lower end is separately fixed at the both sides of rigid jumper 5, and two two side wire jumper insulator strings 9 are parallel each other or are " eight " shape.

The wire jumper insulator string can the various compound modes of various materials (porcelain, glass, synthetic material), and (single and many or multi-disc are connected into a string) formed.

Installation process:

At the extra high voltage direct current transmission line strain tower, adopt the squirrel-cage rigid jumper.

Construction plan is finished the stringing construction of circuit both sides routinely, and strain insulator string 7 is installed;

With two side wire jumper insulator strings 9 rigid jumper 5 is hung, according to the pattern difference of rigid jumper, the hitch point of two side wire jumper insulator strings 9 on rigid jumper 5 is positioned at apart from rigid jumper end 0.1L～0.25L place, and L wherein is rigid jumper length.

Carry out with 8 pairs of rigid jumpers of single side wire jumper insulator string 5 spacing, make rigid jumper 5 be fixed in shaft tower cross-arm 3 under, the hitch point of single side wire jumper insulator string 8 on rigid jumper 5 is positioned at the point midway of rigid jumper 5.

For freestanding rigid jumper system, utilize the wire jumper lead-in wire 6 wire clamp exits with rigid jumper end and strain insulator string 7 to be connected and fixed; For the rigid jumper system of stent-type, the buttock line that the rigid jumper two ends are reserved is as wire jumper lead-in wire 6 and the end of buttock line is mounted on the wire clamp exit of strain insulator string 7.

Rigid jumper can adopt various ways such as aluminum pipe formula, squirrel-cage, rigid support posture.

Claims

1. the asymmetric V-type insulator string of transmission line rigid jumper arrangement, rigid jumper (5) is communicated with by the live end of wire jumper lead-in wire (6) with circuit both sides strain insulator strings (7), it is characterized in that: adopt three wire jumper insulator strings to form the asymmetry suspended structure; Being set to of described asymmetry suspended structure: wherein list upper end of propping up side wire jumper insulator string (8) is fixed on the link position place of shaft tower cross-arm (3) and body of the tower (2), and the lower end is fixed on the point midway place of rigid jumper (5); The upper end of other two two side wire jumper insulator strings (9) is separately fixed at shaft tower cross-arm (3) end along on two hanging points of line direction, the lower end is separately fixed at the both sides of rigid jumper (5), and described two two side wire jumper insulator strings (9) are parallel each other or are " eight " shape.