JPS60255005A - Connector of underground transmission line with aerial transmission line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field] The present invention relates to a connection between an underground power transmission line and an overhead power transmission line.

[Prior Art and Problems] Fig. 2 shows the connecting part with the underground power transmission line at the lead-in line from the overhead power transmission line in the substation premises.

In the figure, reference numerals 1, 2, and 3 indicate the restraining towers at the end of the overhead power transmission line, which have different heights for the upper phase, middle phase, and lower phase. 4
is an overhead power transmission line, which is connected to the restraining tower 1 through the insulator chain 5.
It is held back at 2.3. 6 indicates an underground power transmission line, 9 indicates an aerial termination part, and each suspended overhead power transmission line 4 is a vertical electric wire 10 supported by a jumper wire 7 and an insulator chain 8.
It is connected to the air termination part 9 by a lead-in line part.

In this way, if the restraining towers are arranged in a row in the substation premises for each of the three phases, and the aerial termination section 9 is arranged between them, a large area is required. However, the land cost is high;
There are also cases where the necessary land cannot be obtained.

[Disclosure of the Invention] As described above, the present invention does not require the installation of a restraining tower for each phase, but instead installs an aerial termination section around the final tower, and connects the aerial termination section to the transmission line. In order to avoid contact with the upper, middle, and lower phases, the overhead jumper wires are routed around the tower from the respective phase transmission line holding positions, and supported so that they are almost directly above the corresponding aerial terminations. A connection section between an underground power transmission line and an overhead power transmission line, which is characterized by a connection between the aerial termination section and an electric wire.

Examples of the present invention will be described below.

FIG. 1(a) is a plan view of the embodiment, and FIG. 1(b) is a side view.

In the figure, 11 indicates the steel tower main body, and I2 indicates the steel tower main body 11.
The arms projecting to the left and right from each stage are shown. The figure shows a three-phase, two-circuit power transmission line, and the overhead power transmission lines 4 are held in place by insulator chains 8 at three stages: upper phase, middle phase, and lower phase C, upper, middle, and lower.

The aerial termination parts 9 are arranged around the tower main body 11 at appropriate intervals at a position raised to a certain height of the tower main body 11 by a support arm 13 from the ground or from the tower main body 11. An underground power transmission line 6 is connected to each aerial termination portion 9, respectively.

The insulator chain 8 is supported by the arm 12 at a position rotated by 90 degrees from the direction in which the power transmission line 4 of the upper phase 4 is held, and the insulator chain 8 is supported by the arm 13 at a position further rotated by 30 degrees. 180 from the position where the power transmission line 4 is held
An overhead jumper wire 14 is connected to the end of the insulator chain 8 in the rotated direction.

Below the insulator chain 8 in the direction rotated by 180 degrees, a corresponding air terminal part 9 is arranged in a substantially vertical direction, and the part is connected with a vertical electric wire 0.

In the middle phase, the tower main body I
The insulator chain 8 is supported by the arm 13 extending from I,
An overhead jumper wire 14 is passed to the end of the insulator chain 8 from the retaining position of the middle mating. A corresponding aerial termination portion 9 is located almost directly below this, and is connected by a vertical electric wire 10.

The lower phase C is in the direction of 30 degrees from the detent direction of the power transmission line 4.

The insulator chain 8 is supported by the arm 12 extending from the tower main body 11, and the insulator chain 8 is supported from the retaining position of the lower phase C.
An imaginary shirt par line 14 is passed to the end of the line.

A corresponding aerial termination portion 9 is located almost directly below this, and is connected by a vertical electric wire 10.

Although the arrangement and connection for one line have been described above, the arrangement and connection for another line may be done in the same manner.

When the overhead jumper wires for each phase are rotated by an arm, the phase wires come close to each other, so it goes without saying that the wires must be wired so that they do not come close to each other.

[Effect] As explained above, according to the present invention, an aerial termination section is arranged around the final steel tower, thereby allowing the use of overhead power transmission lines, OF cables, CV cables, and conduit aerial power transmission lines. The connection area with the underground power transmission line is smaller than the conventional connection area as shown in Figure 2, and the total area is reduced to 1/2 to 1/3, reducing the land cost by 1ζ. This eliminates land shortages and eliminates the need for conventional detention towers, reducing tower construction costs.

[Brief explanation of the drawing]

FIG. 1(A) is a plan view of an embodiment of the present invention. FIG. 1 shows the connection between a conventional underground power transmission line and an overhead power transmission line. 4... Overhead power transmission line, 5, 8... Insulator chain, 6... Underground power transmission line, 7, 14... Jumper wire, 9... Aerial termination part, 10... Electric wire, 11... Steel tower body, 12.
13...Arm. W1 figure (b) ★2 figure

Claims (2)

[Claims] (1) Install an aerial termination section around the final steel tower, and connect overhead jumper wires to the tower so that they correspond to the aerial termination section to be connected and do not come close to the upper phase, middle phase, or lower phase of the transmission line. A connection part between an underground power transmission line and an overhead power transmission line, which is wound around the surrounding area, supported so as to be almost directly above the corresponding air termination part, and connected to the corresponding air termination part with an electric wire. . (2) The underground power transmission line and the overhead power transmission line according to claim 1, wherein the aerial terminal portion of the underground power transmission line is arranged around the steel tower at a certain height position. Connection with power transmission line.