JP3324091B2 - Low corona noise multiconductor line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a low-corona-noise multiconductor line using conductive auxiliary wires, which reduces corona noise during rainfall.

[0002]

2. Description of the Related Art A conventional low corona noise multiconductor line is shown in FIG.
As shown in (a) and (b), the auxiliary wire spacer 3 is attached to the two conductors 2 on the ground side of the multiconductor line composed of a plurality of conductors 2 which are separated from each other by the multiconductor spacer 1. The conductive additional wire 4 is provided by slackening the conductive wire 4 substantially below the center of the two conductors 2 by the additional wire spacer 3. The conductive additional wire 4 is also provided on the multiconductor spacer 1. In FIG. 3, reference numeral 5 denotes an insulator that insulates the conductive auxiliary wire in the length direction.

[0003]

The conductors of an ultra-high voltage multiconductor line having a surface potential gradient of more than 13 kV / cm are attracted to each other by an electromagnetic force generated by an interphase short circuit, or are subjected to strong winds during icing. Galloping vibration of large amplitude (2 to 10m) occurs at low frequency (0.1 to 0.5Hz), and snowfall falls and jumps up at the same time as temperature rises (three jump). In such a case, the conductive additional line vibrates in the same or opposite phase as the conductor, and the conductive additional line attached to the multi-conductor spacer portion collides with the multi-conductor spacer and is damaged or, in the worst case, Disconnection may cause a secondary disaster. According to the present invention, even if the conductor causes galloping vibration, the conductive additional wire collides with the multi-conductor spacer and is damaged or disconnected.
The purpose is to provide a long life and safe low corona noise multi-conductor line that does not cause a secondary disaster.

[0004]

According to the present invention, there is provided a multi-conductor line composed of a plurality of conductors which are separated from each other by a multi-conductor spacer. A low corona noise multi-conductor line provided with a conductive conductor slackened substantially below the center thereof, wherein the conductive conductor is not provided on a multiconductor spacer portion. It is.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the low corona noise multi-conductor line of the present invention, the conductive line is not attached to the multi-conductor spacer, so that the multi-conductor line causes mutual suction, galloping vibration, three jump, etc. However, the conductive additional wire does not collide with the multi-conductor spacer and is not damaged, or the wire is disconnected and a secondary disaster does not occur. According to the present invention, as long as the conductive additional wire does not collide with the multi-conductor spacer, the additional wire spacer can be provided as close as possible to the multi-conductor spacer, so that corona noise at the multi-conductor spacer portion can be minimized. .

[0006]

(Embodiment 1) The present invention will be described in detail below with reference to embodiments. FIG. 1 (a) is a perspective view showing an example of a low corona noise multiconductor line of the present invention. A large number of additional spacers 3 are provided at predetermined intervals on the two conductors 2 on the ground side of the multiconductor line composed of a plurality of conductors 2 which are separated from each other by the multiconductor spacer 1. A conductive auxiliary wire 4 is attached to the central portion of each of them with a slack. The conductive additional wire 4 is not attached to the multiconductor spacer 1. FIG. 1 (b) is a side view of the low-corona noise multi-conductor line shown in FIG. 1 (a). The span (subspan length) L of the multi-conductor spacer 1 is 50 m, and the seven additional spacers within the interval are 1 m apart from the first and seventh additional spacers 31 and 37, respectively. At the place, the auxiliary wire spacers 31 to 37 are erected at an interval of 8 m from each other.

(Embodiment 2) FIG. 2 is a side view showing another example of the low corona noise multiconductor line of the present invention. The mounting interval L of the multi-conductor spacer 1 is 50 m, and the three additional spacers 3 are provided within the interval.
Are each installed at a distance of 1 m from the multi-conductor spacer 1, and the auxiliary wire spacers 31 to 33 are installed at an interval of 24 m from each other. A sex line is attached and attached with slack.

In the low corona noise multi-conductor lines of the first and second embodiments, even if galloping occurs, the conductive auxiliary line does not collide with the multi-conductor spacer, and therefore does not get damaged, and is safe for a long time. Power was transmitted to. In the present invention, there is no particular limitation on the attachment interval of the auxiliary wire, the amount of slack in the conductive wire, and the like. In the above embodiment, the distance between the multi-conductor spacer and the auxiliary wire spacer is set to 1 m. However, the slack of the auxiliary wire can be further reduced by reducing the slack.

[0009]

As described above, in the low-corona multi-conductor line of the present invention, since the conductive auxiliary wire is not attached to the multi-conductor spacer, interphase short-circuit, galloping, three-jump, etc. occur. Also, the conductive auxiliary wire does not collide with the multiconductor spacer and is not damaged or disconnected. Therefore, it has a long life and is safe.

[Brief description of the drawings]

FIG. 1 shows an example of a low corona noise multiconductor line of the present invention.
(A) is a perspective view and (B) is a side view.

FIG. 2 is a side view showing another example of the low corona noise multi-conductor line of the present invention.

FIG. 3 is (a) a perspective view and (b) a side view of a conventional low corona noise multiconductor line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-conductor spacer 2 Conductor 3 Additional wire spacer 31-37 Additional wire spacer 4 Conductive additional wire 5 Insulator L Sub span length

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-236222 (JP, A) Japanese Utility Model Application No. 59-164439 (JP, U) Japanese Utility Model Application No. 57-69431 (JP, U) Japanese Utility Model Application No. Sho 56- 9825 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 7/12

Claims (1)

(57) [Claims] 1. A multi-conductor line comprising a plurality of conductors which are separated from each other by a multi-conductor spacer. The low corona noise multi-conductor line according to claim 1, wherein the conductive additional line is not provided at a multi-conductor spacer portion.