CN110273570A - Novel framework type single loop terminal shaft tower - Google Patents

Abstract

The invention discloses a new-type frame-type single-circuit terminal pole tower. The pole tower is a three-layer or four-layer cross arm, and the cross arm includes a ground wire cross arm, a middle phase wire cross arm, a left phase wire cross arm and a right phase wire cross arm. The traditional terminal tower of the transmission line and the isolated gear of the incoming line are cancelled, which is of positive significance for making full use of the tower span and reducing the project cost, and at the same time avoids the location movement of the substation caused by the limited position of the terminal tower on the outlet side. Cancellation of the traditional structure of the substation has positive significance for further reducing the area occupied by the substation. When multiple circuits are outgoing, there is no need to distribute a row of terminal towers on the outgoing line side of the substation, thereby improving the land use efficiency on the outgoing line side and optimizing the look and feel of the transmission line corridor. The outlet deflection angle is greatly increased, and the degree of freedom of the outlet direction is increased.

Description

New frame type single circuit terminal pole tower

technical field

The invention belongs to the field of power transmission lines, and in particular relates to a novel frame-type single-circuit terminal tower.

Background technique

As shown in Figure 1, in the current power transmission and transformation project, the outgoing line frame belongs to the design scope of the substation. In order to meet the requirements of the load, deflection angle, and electrical distance of the outgoing line frame, the existing transmission line is inserted into the substation by setting a base terminal tower, and It is realized by reducing the distance between the incoming wire gear and relaxing the tension.

There is a problem:

(1) Due to the limitation of the outgoing line structure, the transmission line terminal tower is different from the continuous gear tower due to the different stress conditions, resulting in its tower material and foundation earthwork being larger than the conventional tower under the same conditions, and the span cannot be fully utilized, resulting in an increase in project investment , In addition, the outgoing line needs to meet the comprehensive deflection angle requirements of the substation, and the freedom of outgoing line is limited.

(2) The multi-base terminal towers are densely arranged at the outlet of the substation, which affects the impression and decision-making of the planning department on the power transmission and transformation project.

(3) The separation design of the frame and the terminal tower makes the transmission line and the substation have professional interface problems such as the deflection angle of the outgoing line, the position and size of the hanging point of the ground wire at the incoming line stall, and a slight negligence will hinder the smooth development of the project construction.

(4) The existing substation outgoing line optimization scheme, whether it is a special outgoing line structure such as "Plover Type" or "Sail Combined Type" or a line outgoing line planning, or a special design of a terminal tower, is analyzed solely from the perspective of substation or line. The effect of saving engineering cost is not obvious, and at the same time, it restricts the further reduction of the substation area.

Contents of the invention

The object of the present invention is to provide a novel frame type single-circuit terminal tower aiming at the deficiencies of the prior art.

In order to achieve the above object, the technical scheme that the present invention takes is:

Option One

A new type of frame type single circuit terminal pole tower, including a pole tower, the pole tower is a three-layer cross arm, the transmission line on the three-layer cross arm is directly connected to the substation, and the uppermost layer is a ground wire cross arm for connecting the transmission line ground wire and optical cable , the crossarms of the ground wires on both sides of the shaft are perpendicular to the shaft and are located in the same longitudinal plane. The lower layer of the cross arm is the cross arm of the left phase conductor and the cross arm of the right phase conductor used to connect the left phase and right phase conductors of the single circuit transmission line into the station, the cross arm of the left phase conductor and the cross arm of the right phase conductor and the pole The body is vertical and lies in the same longitudinal plane.

Option II

The new frame type single-circuit terminal tower includes a tower, the tower is a four-story cross arm, the transmission line on the four-story cross arm is directly connected to the substation, and the uppermost layer is a ground wire cross arm for connecting the transmission line ground wire and optical cable , the crossarms of the ground wires on both sides of the shaft are perpendicular to the shaft and are located in the same longitudinal plane. The crossarm is offset to the side of the substation. The lower layer of the middle phase conductor crossarm is the right phase conductor crossarm used to connect the right phase conductor of the single-circuit transmission line into the station. The crossarm is perpendicular to the shaft, and the lower layer of the right phase conductor crossarm is used The cross-arm of the left-phase conductor that leads the left-phase conductor of the single-circuit transmission line into the station is used, and the cross-arm of the right-phase conductor is shifted to the outside of the station.

Beneficial effects of the present invention: the present invention cancels the traditional terminal pole tower of the power transmission line and the isolated gear of the incoming line, which has positive significance for making full use of the pole tower span and reducing the project cost, and at the same time avoids the position shift of the substation caused by the limited position of the terminal pole tower on the outlet side . Cancellation of the traditional structure of the substation has positive significance for further reducing the area occupied by the substation. When multiple circuits are outgoing, there is no need to distribute a row of terminal towers on the outgoing line side of the substation, thereby improving the land use efficiency on the outgoing line side and optimizing the look and feel of the transmission line corridor. Without going through the frame, the pole tower is directly used for the outlet, the deflection angle of the outlet is greatly increased, and the degree of freedom of the outlet direction is increased.

Description of drawings

Fig. 1 is the structural representation of background technology;

Fig. 2 is the structural representation of embodiment one;

Fig. 3 is a schematic structural diagram of the second embodiment.

Detailed ways

The present invention will be further described below in conjunction with embodiment.

Embodiment one

The new frame type single-circuit terminal pole tower shown in Figure 2 includes a pole tower. The pole tower is a three-layer cross-arm, and the transmission line on the three-layer cross-arm is directly connected to the substation. The uppermost layer is used to connect the transmission line ground wire and The ground wire cross arm 1 of the optical cable, the ground wire cross arms on both sides of the shaft are perpendicular to the shaft, and are located in the same longitudinal plane. Conductor cross arm 2, the lower layer of the middle phase conductor cross arm is the left phase conductor cross arm 4 and the right phase conductor cross arm 3 respectively used to connect the left phase and right phase conductors of the single-circuit transmission line into the station, the left phase conductor cross arm and The two cross arms of the right phase conductor are perpendicular to the shaft and are located in the same longitudinal plane.

The pole tower of this embodiment is divided into three layers, the upper layer is a ground wire cross arm, and the ground wire cross arms on both sides of the shaft are perpendicular to the shaft and are located in the same vertical plane, and are used to connect the power transmission line ground wire and the optical cable. The lower layer of the cross arm of the ground wire is the cross arm of the middle phase conductor, which is used to connect the middle phase conductor of the single-circuit transmission line into the station. The lower layer of the middle-phase conductor cross-arm is the left-phase conductor cross-arm and the right-phase conductor cross-arm respectively. The two cross-arms are perpendicular to the shaft and are located in the same longitudinal plane, and are used to connect the left-phase and right-phase conductors of the single-circuit transmission line. stand.

Embodiment two

The new frame type single-circuit terminal pole tower shown in Figure 3 includes a pole tower, the pole tower is a four-layer cross arm, the transmission line on the four-layer cross arm is directly connected to the substation, and the uppermost layer is used to connect the ground wire of the transmission line and The ground wire cross arm 1 of the optical cable, the ground wire cross arms on both sides of the shaft are perpendicular to the shaft, and are located in the same longitudinal plane. Conductor cross arm 2, the middle phase conductor cross arm is offset to the substation side, the lower layer of the middle phase conductor cross arm is the right phase conductor cross arm 3 used to connect the right phase conductor of the single-circuit transmission line into the station, and the cross arm is perpendicular to the shaft , the lower layer of the right-phase conductor cross-arm is the left-phase conductor cross-arm 4 for connecting the left-phase conductor of the single-circuit transmission line into the station, and the right-phase conductor cross-arm is offset to the outside of the station.

The pole tower of this embodiment is divided into four layers, the upper layer is a ground wire cross arm, and the ground wire cross arms on both sides of the shaft are perpendicular to the shaft body and are located in the same vertical plane, and are used to connect the power transmission line ground wire and the optical cable. The lower layer of the cross-arm of the ground wire is the cross-arm of the medium-phase conductor, and the cross-arm is offset to the substation side to connect the medium-phase conductor of the single-circuit transmission line into the station. The lower layer of the cross arm of the middle phase conductor is the cross arm of the right phase conductor, which is perpendicular to the shaft, and is used to connect the right phase conductor of the single-circuit transmission line into the station. The lower layer of the right-phase conductor cross-arm is the left-phase conductor cross-arm, and the cross-arm is offset to the outside of the station to connect the left-phase conductor of the single-circuit transmission line into the station.

The specific entry method of the above embodiment is: cancel the substation structure, and install a frame-type single-circuit terminal tower at the original frame position, cancel the traditional isolated gear terminal tower for the transmission line, and directly use continuous gear routing to the frame-type single-circuit terminal tower , and connected to the substation through a jumper.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and that described in the above-mentioned embodiments and the specification only illustrates the principles of the present invention, without departing from the spirit and scope of the present invention. Simple modifications and replacements by skilled personnel are all within the protection scope of the present invention.

Claims (2)

1. novel framework type single loop terminal shaft tower, it is characterised in that: including shaft tower, the shaft tower is three layers of cross-arm, three layers of cross Transmission line of electricity in load is directly connect with substation, and top layer is the ground wire cross-arm for connecting earth wire of power transmission line and optical cable, Shaft two sides ground wire cross-arm is vertical with shaft, and is located in same vertical plane, and ground wire cross-arm lower layer is to draw single feedback electricity to connect The middle phase conductor cross-arm that phase conductor enters the station in route, middle phase conductor cross-arm lower layer are respectively to draw the left phase of single back transmission line to connect And left phase conductor cross-arm and right phase conductor cross-arm that right phase conductor enters the station, left phase conductor cross-arm and right two cross-arm of phase conductor cross-arm with Shaft is vertical, and is located in same vertical plane.

2. novel framework type single loop terminal shaft tower, it is characterised in that: including shaft tower, the shaft tower is four layers of cross-arm, four layers of cross Transmission line of electricity in load is directly connect with substation, and top layer is the ground wire cross-arm for connecting earth wire of power transmission line and optical cable, Shaft two sides ground wire cross-arm is vertical with shaft, and is located in same vertical plane, and ground wire cross-arm lower layer is to draw single feedback electricity to connect The middle phase conductor cross-arm that phase conductor enters the station in route, middle phase conductor cross-arm are deviated to transformer substation side, and middle phase conductor cross-arm lower layer is To connect the right phase conductor cross-arm for drawing the right phase conductor of single back transmission line and entering the station, cross-arm is vertical with shaft, under right phase conductor cross-arm Layer is, to connect the left phase conductor cross-arm for drawing the left phase conductor of single back transmission line and entering the station, the right phase conductor cross-arm is on the outside of standing Offset.