JPS61167319A - Overhead ground wire on which snow is difficult to adhere - Google Patents
Overhead ground wire on which snow is difficult to adhereInfo
- Publication number
- JPS61167319A JPS61167319A JP60008167A JP816785A JPS61167319A JP S61167319 A JPS61167319 A JP S61167319A JP 60008167 A JP60008167 A JP 60008167A JP 816785 A JP816785 A JP 816785A JP S61167319 A JPS61167319 A JP S61167319A
- Authority
- JP
- Japan
- Prior art keywords
- snow
- overhead ground
- wire
- ground wire
- adhere
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ジュール熱による融雪効果の得られる難着雪
架空地線に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an overhead ground wire that is difficult to snow, and which can obtain a snow melting effect using Joule heat.
架空送電線に雪が付着し、次第に成長していくと重みで
線が切れ或いは送電線に異常接近して地絡事故を生じた
り、鉄塔の倒壊につなかつりするので、豪雪地帯に粘い
てはその種の事故を無くすための雪道は対策が必要にな
る。特に、送電線路の架空地線は、融雪効果が得られる
程の電流が流れていないため、送電用の本線以上に着雪
、着氷を生じ易く、従って、より効果的な着雪防止策が
要求される。If snow adheres to overhead power lines and gradually grows, the weight can cause the lines to break or get too close to the power lines, causing ground faults and the collapse of towers, so do not stick to them in areas with heavy snowfall. Measures need to be taken on snowy roads to eliminate such accidents. In particular, the overhead ground wires of power transmission lines do not carry enough current to melt snow, so they are more prone to snow and ice accumulation than the main lines for power transmission, and therefore more effective measures to prevent snow accumulation are needed. required.
この雪害対策としては、電線の形状等の工夫（こよって
着雪の成長を妨げる方法と、通電によるジュール熱で付
着した雪や氷を誘解させる方法の２通りが考えられるが
、前者の方法は電線の生産性等に悪影響を及ぼす。There are two ways to prevent this snow damage: one is to modify the shape of the electric wires (thus preventing the growth of snow), and the other is to melt the snow and ice with Joule heat generated by electricity.The first method is This has a negative impact on the productivity of wires.
一方、後者の方法は、架空地線の場合、この線を電源に
つないでも、地線に印加した電流が途中の鉄塔部から地
上に逃げるのでジュール熱が殆んど得られない。On the other hand, in the latter method, in the case of an overhead ground wire, even if this wire is connected to a power source, the current applied to the ground wire escapes to the ground from the steel tower part in the middle, so almost no Joule heat is obtained.
そこで、本発明は、下記の工夫を施すことにより、通電
法による架空地線の融雪効果を得るようにしている。Therefore, in the present invention, the following measures are taken to obtain the snow melting effect of the overhead ground wire by the energization method.
その工夫とは、第１図に示すように、送電用の本線１に
近接して２条の架空地線２を架設し、線路の径間端末部
即ち鉄塔３の近辺において２条の架空地線を短絡電線４
を介して電気的に結ぶと云うことである。短絡線４の地
線への接続はクランプ５等を介して行えばよい。As shown in Figure 1, two overhead ground wires 2 are installed close to the main power transmission line 1, and two overhead ground wires are installed near the end of the line span, that is, near the steel tower 3. Short-circuit wire 4
This means that they are electrically connected via the . The shorting wire 4 may be connected to the ground wire via a clamp 5 or the like.
このようにすると、本線の電流による電磁誘導で２条の
架空地線２．２と短線電線４．４によって構成される閉
回路（ループ回路）に起電力が発生し、図の矢印で示す
ように電流が流れる。そして、この電流により閉回路を
構成する線にジュール熱が発生し、その線に付着した雪
や氷が溶かされることになる。In this way, an electromotive force is generated in the closed circuit (loop circuit) made up of the two overhead ground wires 2.2 and the short wire 4.4 due to electromagnetic induction caused by the current in the main line, as shown by the arrows in the figure. A current flows through. This current generates Joule heat in the wires that make up the closed circuit, melting snow and ice attached to the wires.
上記の効果の確認のために行つ１こ実験結果を以下に記
す。The results of an experiment conducted to confirm the above effects are described below.
この実験では７００Ａの電流を流した公称断面積２４０
−のＡＣ８Ｒ線（鋼心アルミ撚り線）７の直下に、離反
距離Ｓ＝１ｍを確保してＷ＝１ｍ。In this experiment, a nominal cross-sectional area of 240
Directly below the - AC8R wire (steel core aluminum stranded wire) 7, with a separation distance of S = 1 m, W = 1 m.
Ｌ＝２Ｃ）ｌの寸法でループにした公称断面積５５−の
ＧＳＷ線（亜鉛メッキ銅より線）８を配置してその線８
の温度上昇を調べた。L = 2C) A GSW wire (galvanized copper stranded wire) 8 with a nominal cross-sectional area of 55- is arranged into a loop with a dimension of l, and the wire 8 is
The temperature rise was investigated.
その結果ＧＳＷ線８にはＡＣ８Ｒ線からの電磁誘導作用
によって５ＯＡの電流が誘起され、その電流によるジュ
ール熱で線８の温度は外気温２０℃下で３５°Ｃに上昇
した。こ９場合の上昇温度１５℃は、当然のことながら
、外気温が一１５℃以上のときに融雪効果の得られるこ
とを意味している。As a result, a current of 5 OA was induced in the GSW wire 8 by electromagnetic induction from the AC8R wire, and the temperature of the wire 8 rose to 35° C. under the outside temperature of 20° C. due to Joule heat generated by the current. The temperature increase of 15° C. in this case 9 naturally means that the snow melting effect can be obtained when the outside temperature is 115° C. or higher.
〔効果）
以上の通り、本発明によれば、本線を流れる電流の電磁
誘導によって２条の架空地の閉回路部分に誘導電流が流
れ、その電流によるジュール熱で地線への着雪が防止さ
れるので、雪の重みに起因しｔこ地絡事故等を生じるこ
とがなく、鉄塔の経済的な設計も可能になる。[Effects] As described above, according to the present invention, an induced current flows in the closed circuit portion of the two overhead ground lines due to electromagnetic induction of the current flowing through the main line, and the Joule heat generated by the current prevents snow from accumulating on the ground line. Therefore, ground faults and the like due to the weight of snow do not occur, and the tower can be designed economically.
第１図は、本発明の架空地線を概略的に示す斜視図、第
２図は実験に用いｔこ線路の線図である。FIG. 1 is a perspective view schematically showing an overhead ground wire of the present invention, and FIG. 2 is a line diagram of the line used in the experiment.
Claims (1)
線路の径間端末部においてその２条の架空地線を短絡電
線で結ぶことを特徴とする難着雪架空地線。A snow-resistant overhead ground wire characterized in that two overhead ground wires are installed close to a power transmission main line, and the two overhead ground wires are connected by a short-circuit wire at the end of the span of the power transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60008167A JPS61167319A (en) | 1985-01-18 | 1985-01-18 | Overhead ground wire on which snow is difficult to adhere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60008167A JPS61167319A (en) | 1985-01-18 | 1985-01-18 | Overhead ground wire on which snow is difficult to adhere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61167319A true JPS61167319A (en) | 1986-07-29 |
Family
ID=11685776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60008167A Pending JPS61167319A (en) | 1985-01-18 | 1985-01-18 | Overhead ground wire on which snow is difficult to adhere |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61167319A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780193A (en) * | 2012-07-06 | 2012-11-14 | 广东电网公司电力科学研究院 | Current ice-melting method for overhead ground wires of electric transmission line |
| CN104332929A (en) * | 2014-11-26 | 2015-02-04 | 国家电网公司 | Single-ground wire ice melting method |
-
1985
- 1985-01-18 JP JP60008167A patent/JPS61167319A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780193A (en) * | 2012-07-06 | 2012-11-14 | 广东电网公司电力科学研究院 | Current ice-melting method for overhead ground wires of electric transmission line |
| CN104332929A (en) * | 2014-11-26 | 2015-02-04 | 国家电网公司 | Single-ground wire ice melting method |
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