JPH0311914A - Decision of snowing on overhead line - Google Patents
Decision of snowing on overhead lineInfo
- Publication number
- JPH0311914A JPH0311914A JP1144617A JP14461789A JPH0311914A JP H0311914 A JPH0311914 A JP H0311914A JP 1144617 A JP1144617 A JP 1144617A JP 14461789 A JP14461789 A JP 14461789A JP H0311914 A JPH0311914 A JP H0311914A
- Authority
- JP
- Japan
- Prior art keywords
- overhead
- overhead line
- optical fiber
- snow
- line
- 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
- 239000013307 optical fiber Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract 2
- 238000009825 accumulation Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は架空地線、架空送電線等の架空線の任意の地点
における着雪の有無を判定する着雪判定方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a snow accretion determination method for determining the presence or absence of snow accumulation at any point on an overhead line such as an overhead ground wire or an overhead power transmission line.
従来、架空線への着雪の有無の判定はロードセルで行っ
ていた０例えば第２図に示すように、架空線ｌが鉄塔２
に懸垂クランプ３によって懸垂支持される場合には、鉄
塔２とクランプ３との間にロードセル４を介在させ、該
ロードセル４で架空線ｌに雪が積もったときの荷重の増
加を検知して架空線への着雪を判定する方法である。Conventionally, the presence or absence of snow accretion on overhead lines was determined using load cells.For example, as shown in Figure 2, overhead lines l
When the overhead wire l is suspended and supported by the suspension clamp 3, a load cell 4 is interposed between the steel tower 2 and the clamp 3, and the load cell 4 detects the increase in load when snow accumulates on the overhead wire l. This is a method to determine whether snow has accumulated on the ground.
しかしながら、ロードセルによる着雪判定方法は、ロー
ドセル自体に電源を必要とするため、山岳地帯や過疎地
においても架空線の線路全区間に亙って各鉄塔付近に電
源を準備しなければならず、また、測定結果を変電所等
へ伝送するための通信回線も必要となる等非常にコスト
高となる問題点があった。However, since the snow accumulation determination method using a load cell requires a power source for the load cell itself, a power source must be provided near each tower along the entire length of the overhead line even in mountainous and sparsely populated areas. Furthermore, there are problems in that a communication line is also required to transmit the measurement results to a substation, etc., resulting in extremely high costs.
一方、最近は架空地線に光ファイバを組み込んだり、添
設して通信回線とする工事が進み、発電所から変電所ま
で光フアイバケーブルが引かれるようになってきている
。On the other hand, recently, construction work has progressed to incorporate or attach optical fibers to overhead ground wires to create communication lines, and optical fiber cables are now being run from power plants to substations.
本発明は係る光ファイバを使って架空線の全線路に亙っ
て着雪を判定しうる架空線への着雪判定方法を提供する
ことにある。An object of the present invention is to provide a method for determining snow accretion on an overhead line, which can determine snow accretion over the entire line of an overhead line using such an optical fiber.
本発明は上記の間即点を解決するためになされたもので
、架空線に設けた光ファイバに、光源から光パルスを送
り込み、光ファイバの各点から戻る後方散乱光の強度と
遅れ時間から、架空線の任意地点の温度を測定し、該測
定温度が１°Ｃ〜＝１°Ｃの範囲で一定時間推移したと
き架空線に着雪があったと判定することを特徴とする架
空線への着雪判定方法にある。The present invention was made in order to solve the above-mentioned point-in-time problem.It sends a light pulse from a light source to an optical fiber installed in an overhead line, and calculates the intensity and delay time of backscattered light returning from each point of the optical fiber. , the temperature of an arbitrary point on the overhead line is measured, and when the measured temperature remains in the range of 1°C to 1°C for a certain period of time, it is determined that there is snow on the overhead line. It's in the snowfall determination method.
変電所または発電所に、架空線に設けた光ファイバの端
末に光パルスを送る光源を設置し、該光源から光ファイ
バに光パルスを送り込むと、光ファイバの各点から後方
散乱光が戻ってくる。この後方散乱光の強度と遅れ時間
から温度と距離が測定できる。A light source is installed at a substation or power plant that sends light pulses to the terminals of optical fibers installed on overhead lines, and when light pulses are sent from the light source to the optical fibers, backscattered light returns from each point of the optical fibers. come. Temperature and distance can be measured from the intensity and delay time of this backscattered light.
本発明はかかる原理を適用し、かつ、架空線に着雪があ
ったときの架空線の温度が雪の溶解温度である０°Ｃ前
後で、ある一定時間保たれることを応用して、光パルス
による温度測定結果がある一定時間１°Ｃ〜−１’Ｃの
範囲で推移したとき送電線に着雪があったと判定するも
ので、現場には何らの装置も配置・設置する必要がなく
、全線路に亙って着雪の監視が可能となる。The present invention applies this principle and also takes advantage of the fact that when snow has fallen on an overhead line, the temperature of the overhead line is maintained at around 0°C, which is the melting temperature of snow, for a certain period of time. When the pulse temperature measurement results remain within the range of 1°C to -1'C for a certain period of time, it is determined that there is snow on the power transmission line, and there is no need to arrange or install any equipment at the site. Snow accumulation can be monitored along the entire track.
第１図は本発明の実施例を示すもので、１１は架空線で
、該架空線１１は架空地線１２と架空送電線１３とから
なっている。１４は架空地線１２に設けた光ファイバで
、その端末は変電所（または発電所）１５内に引き込ま
れている。１６は後方散乱光の強度と遅れ時間から温度
と距離を測定するための装置で、該装置は光ファイバに
光パルスを送る光源と、該光源から送信されたパルスが
光ファイバの各地点から戻る後方散乱光の強度と遅れ時
間を測定し、温度と距離に換算するコンピュータとから
なっている。FIG. 1 shows an embodiment of the present invention, in which 11 is an overhead line, and the overhead line 11 is composed of an overhead ground wire 12 and an overhead power transmission line 13. Reference numeral 14 denotes an optical fiber installed on the overhead ground wire 12, the terminal of which is drawn into a substation (or power plant) 15. 16 is a device for measuring temperature and distance from the intensity and delay time of backscattered light. It consists of a computer that measures the intensity and delay time of backscattered light and converts it into temperature and distance.
光源から光パルスを光ファイバに送り込むことにより戻
ってくる後方散乱光を例えば１分間毎に取り出し、測定
温度が１°Ｃ〜−１°Ｃの範囲に入っているか否かを判
断し、この範囲に連続的に１０回（１０分）以上入って
いるときにその測定地点に着雪があったと判定する。温
度が１°Ｃ〜−１’Ｃの範囲に入る時間と着雪状況の判
定はその地方の気候と温度によって多少変化するが、１
０分〜３０分の間に設定するのが最適である。By sending a light pulse from a light source into an optical fiber, the backscattered light that returns is extracted every minute, for example, and it is determined whether the measured temperature is within the range of 1°C to -1°C. 10 times (10 minutes) or more consecutively, it is determined that snow has fallen at that measurement point. The time when the temperature falls within the range of 1°C to -1'C and the snowfall situation will vary slightly depending on the local climate and temperature, but 1
It is best to set the time between 0 and 30 minutes.
以上詳述したように本発明の方法によれば架空線の全線
に亙っての着雪状況が１ケ所で把握でき、従来のロード
セル方式に比べ経費も安価となる利点がある。As described in detail above, the method of the present invention has the advantage that the snow accumulation situation over the entire overhead line can be grasped from one place, and the cost is lower than that of the conventional load cell method.
第１図は本発明の一実施例を示す説明図、第２図は従来
の方法を示す説明図である。
１１は架空線
１４は光ファイバ
１５は変電所（または発電所）
１６は温度・距離測定装置
２
１
第１図
６FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a conventional method. 11 is an overhead line 14 is an optical fiber 15 is a substation (or power plant) 16 is a temperature/distance measuring device 2 1 Fig. 1 6
Claims (1)
込み、光ファイバの各点から戻る後方散乱光の強度と遅
れ時間から、架空線の任意地点の温度を測定し、該測定
温度が１℃〜−１℃の範囲で一定時間推移したとき架空
線に着雪があったと判定することを特徴とする架空線へ
の着雪判定方法。A light pulse is sent from a light source to an optical fiber installed on an overhead line, and the temperature at any point on the overhead line is measured from the intensity and delay time of the backscattered light returning from each point of the optical fiber, and the measured temperature is 1°C. A method for determining snow accretion on an overhead line, characterized in that it is determined that snow has accreted on the overhead line when the temperature remains in the range of -1°C for a certain period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1144617A JPH0311914A (en) | 1989-06-07 | 1989-06-07 | Decision of snowing on overhead line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1144617A JPH0311914A (en) | 1989-06-07 | 1989-06-07 | Decision of snowing on overhead line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0311914A true JPH0311914A (en) | 1991-01-21 |
Family
ID=15366201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1144617A Pending JPH0311914A (en) | 1989-06-07 | 1989-06-07 | Decision of snowing on overhead line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0311914A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5411121A (en) * | 1994-03-22 | 1995-05-02 | Laforte; Jean-Louis | Deicing device for cable |
| US6207939B1 (en) | 1997-08-01 | 2001-03-27 | Hydro-Quebec | Device and method for de-icing an elongated structural element |
| DE102006013248A1 (en) * | 2006-03-21 | 2007-09-27 | Stadtwerke Mainz Ag | High voltage line`s e.g. telephone line, mechanical load detecting device, has detecting unit with pressure or force sensors, which detect weights of high voltage lines and/or forces working on high voltage lines at hanging points in pylon |
| GB2532031A (en) * | 2014-11-05 | 2016-05-11 | Cambridge Consultants | System and method for detecting a change in shape of at least one predefined region of an optical fibre |
| FR3135324A1 (en) * | 2022-05-06 | 2023-11-10 | Osmos Group | Method, system and sensor for monitoring a structure by optical fiber |
-
1989
- 1989-06-07 JP JP1144617A patent/JPH0311914A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5411121A (en) * | 1994-03-22 | 1995-05-02 | Laforte; Jean-Louis | Deicing device for cable |
| US6207939B1 (en) | 1997-08-01 | 2001-03-27 | Hydro-Quebec | Device and method for de-icing an elongated structural element |
| DE102006013248A1 (en) * | 2006-03-21 | 2007-09-27 | Stadtwerke Mainz Ag | High voltage line`s e.g. telephone line, mechanical load detecting device, has detecting unit with pressure or force sensors, which detect weights of high voltage lines and/or forces working on high voltage lines at hanging points in pylon |
| GB2532031A (en) * | 2014-11-05 | 2016-05-11 | Cambridge Consultants | System and method for detecting a change in shape of at least one predefined region of an optical fibre |
| FR3135324A1 (en) * | 2022-05-06 | 2023-11-10 | Osmos Group | Method, system and sensor for monitoring a structure by optical fiber |
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