JP2593555B2 - Transmission line position detector - Google Patents
Transmission line position detectorInfo
- Publication number
- JP2593555B2 JP2593555B2 JP14524789A JP14524789A JP2593555B2 JP 2593555 B2 JP2593555 B2 JP 2593555B2 JP 14524789 A JP14524789 A JP 14524789A JP 14524789 A JP14524789 A JP 14524789A JP 2593555 B2 JP2593555 B2 JP 2593555B2
- Authority
- JP
- Japan
- Prior art keywords
- optical
- transmission line
- optical fiber
- electro
- converter
- 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.)
- Expired - Lifetime
Links
Landscapes
- Locating Faults (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えば、送電線の事故位置等を検出する送
電線の位置検出装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement of a transmission line position detecting device for detecting, for example, an accidental position of a transmission line.
本出願人は、先に、送電線の事故位置等を検出するた
めに送電線に並行して光ファイバを設置し、送電線の事
故位置等に相応して光ファイバに変形、側圧等を与えて
伝送損失を付与する複数の伝送損失付与手段を備え、こ
れらの複数の伝送損失付与手段にそれぞれ異なる周期の
損失を付与し、周波数分析器でこの損失周波数を分析し
て位置を検出するようにした送電線の位置検出装置を提
案している（特願昭63−240927号参照）。The applicant has previously installed an optical fiber in parallel with the transmission line in order to detect an accidental position or the like of the transmission line, and applied deformation or lateral pressure to the optical fiber in accordance with the accidental position or the like of the transmission line. A plurality of transmission loss providing means for providing transmission loss by applying a loss of a different cycle to each of the plurality of transmission loss providing means, and analyzing the loss frequency with a frequency analyzer to detect a position. A transmission line position detection device has been proposed (see Japanese Patent Application No. 63-240927).
また、本出願人は、位置を検出すべき位置で光信号を
光増幅器によってそれぞれ異なる周波数で強度変調し、
これを光ファイバの検出端で復調して周波数から位置を
検出する装置を提案している。In addition, the present applicant modulates the intensity of the optical signal at a position where the position is to be detected by an optical amplifier at different frequencies,
An apparatus for demodulating this at the detection end of the optical fiber and detecting the position from the frequency has been proposed.
しかし、前者の装置は光ファイバに曲げ等の変形を付
与して位置を検出するので長期に亙って信頼性を維持す
ることができなかった。また、後者の装置は常時電力を
供給する光増幅器を必要とするので電力の消費量が多
く、不経済であった。However, the former device applies a deformation such as bending to the optical fiber to detect the position, and cannot maintain the reliability for a long period of time. In addition, the latter device requires an optical amplifier that constantly supplies power, and thus consumes a large amount of power and is uneconomical.
本発明の目的は、上記の欠点を回避し、長期に亙って
信頼性を維持し、且つ消費電力を可及的に低減すること
ができる送電線の位置検出装置を提供することにある。An object of the present invention is to provide a power transmission line position detecting device which avoids the above-mentioned drawbacks, maintains reliability over a long period of time, and can reduce power consumption as much as possible.
本発明は、上記の課題を解決するために、送電線に並
行して設置された光ファイバと、この光ファイバに所定
の間隔をあけて設けられて相応する送電線の検出すべき
位置で光信号を合流する複数の光合流器と、各光合流器
にそれぞれ相応して設置され検出すべき事象が発生した
際に相応する光合流器にそれぞれ異なる周波数の強度変
調光信号を発信する複数の電気−光変換器と、光ファイ
バの検出端に接続されて電気−光変換器が発信する光信
号を受信する光−電気変換器と、この光−電気変換器の
出力端に接続されてその出力信号の周波数を分析する周
波数分析器とを備え、複数の光合流器の合流比は光ファ
イバの検出端で電気−光変換器から発信される光信号の
パワーがすべて等しくなるように設定されていることを
特徴とする送電線の位置検出装置を提供するものであ
る。In order to solve the above-described problems, the present invention provides an optical fiber installed in parallel with a power transmission line, and an optical fiber provided at a predetermined interval in the optical fiber at a position where a corresponding power transmission line should be detected. A plurality of optical combiners for combining signals, and a plurality of optical combiners for transmitting intensity-modulated optical signals of different frequencies to the corresponding optical combiners when an event to be detected is installed corresponding to each optical combiner. An electro-optical converter, an optical-electrical converter connected to the detection end of the optical fiber and receiving an optical signal transmitted by the electro-optical converter, and an optical-electrical converter connected to the output end of the optical-electrical converter. A frequency analyzer for analyzing the frequency of the output signal, wherein the merging ratio of the plurality of optical couplers is set such that the powers of the optical signals transmitted from the electro-optical converter at the detection end of the optical fiber are all equal. Characterized by the transmission line It is intended to provide a 置検 detection device.
このように光ファイバに機械的な変形を与えることな
く、光信号を合流器によって合流させるので長期に亙っ
て信頼性を維持することができ、また電気−光変換器は
送電線事故の如き検出すべき事象が発生した際にのみ駆
動されるので消費電力が少なく経済的に使用することが
できる。更に、光合流器の合流比は各位置からの光信号
のパワーが光ファイバの検出端で等しくなるように設定
されているので遠方からの光信号のパワーだけが低くな
ることがないため、検出距離を長くとることができる。As described above, since optical signals are merged by the merger without mechanically deforming the optical fiber, reliability can be maintained for a long period of time. Since it is driven only when an event to be detected occurs, power consumption is small and it can be used economically. Furthermore, since the power of the optical signal from each position is set to be equal at the detection end of the optical fiber, the power of the optical signal from a distant place is not reduced, so that the power of the optical signal from each position is not reduced. The distance can be increased.
本発明の実施例を図面を参照して詳細にのべると、第
１図は本発明に係る送電線の位置検出装置10を示し、こ
の送電線の位置検出装置10は、例えば、送電線の事故位
置を検出するのに用いられる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described in detail. FIG. 1 shows a transmission line position detecting device 10 according to the present invention. Used to detect position.
本発明の送電線の位置検出装置10は、図示しない送電
線に並行して設置された光ファイバ12と、この光ファイ
バ12に所定の間隔をあ設けられて相応する送電線の検出
すべき位置で光信号を合流する複数の光合流器14A1栄4B
−−−と、各光合流器14A、14B−−−にそれぞれに相応
して設置され相応する光合流器14A、14B−−−にそれぞ
れ異なる周波数の強度変調光信号Sa、Sb−−−（第２図
参照）を発信する複数の電気−光変換器16A、16B−−−
と、光ファイバ12の検出端に接続されて電気−光変換器
14A、14B−−−が発信する光信号Sa、Sb−−−を受信す
る光−電気変換器18と、この光−電気変換器18の出力端
に接続されてその出力信号の周波数を分析する周波数分
析器20とを備えている。電気−光変換器16A、16B−−−
は、それらが設置された位置で検出すべき事象、例えば
送電線に異常電流が流れる事故が発生した際にこの異常
電流を検出する異常電流検出器（図示せず）からの信号
によってそれぞれ異なる周波数の強度変調光信号を発信
するように駆動される。The transmission line position detection device 10 of the present invention includes an optical fiber 12 installed in parallel with a transmission line (not shown), and a position where a corresponding transmission line is to be detected at a predetermined interval provided in the optical fiber 12. Optical combiners 14A1 Sakae 4B to combine optical signals
, And the intensity-modulated optical signals Sa and Sb-() which are respectively installed in the respective optical multiplexers 14A and 14B-- and which have different frequencies in the corresponding optical multiplexers 14A and 14B--. A plurality of electro-optical converters 16A and 16B for transmitting (see FIG. 2)
And an electro-optical converter connected to the detection end of the optical fiber 12.
An optical-to-electrical converter 18 for receiving the optical signals Sa and Sb transmitted from 14A and 14B--and an output terminal of the optical-to-electrical converter 18 for analyzing the frequency of the output signal. And a frequency analyzer 20. Electric-optical converters 16A, 16B
Are different frequencies depending on a signal from an abnormal current detector (not shown) for detecting an event to be detected at a position where they are installed, for example, an accident in which an abnormal current flows in a transmission line. Is driven to emit the intensity-modulated optical signal.
複数の光合流器14A、14B−−−の合流比は光ファイバ
12の検出端で電気−光変換器16A、16B−−−から発信さ
れる光信号のパワーがすべて等しくなるように設定され
ている。The converging ratio of the plurality of optical couplers 14A, 14B
The powers of the optical signals transmitted from the electro-optical converters 16A and 16B at the 12 detection terminals are set to be equal.
次に、本発明の装置の動作をのべると、検出すべき位
置にそれぞれ設置された電気−光変換器16A、16B−−−
は、送電線に定常電流が流れている間は異常電流検出器
が動作しないので駆動されることはない。送電線に地絡
事故の如き異常電流が流れる事故が発生すると、その位
置にある異常電流検出器が動作し、相応する位置にある
電気−光変換器16A、16B−−−のいずれかが駆動されて
その位置に応じた固有の周波数の光信号SaまたはSb−−
−が光合流器14A、14B−−−のいずれかを通して光ファ
イバ12に導入される。従って、光ファイバ12の検出端で
この光信号SaまたはSbが光−電気変換器18によって電気
信号に変換され、この電気信号の周波数が周波数分析器
20によって分析されて事故位置が検出される。電気−光
変換器16A、16B−−−からの光信号を光合流器14A、14B
−−−で合流する場合の合流比は、既にのべたように、
光ファイバ12の検出端がすべての光信号のパワーが等し
くなるように設定される。例えば、説明を簡単にするた
め、位置P1と位置P2からの光信号を合流する第１の光合
流器14Aの合流比を50:50とし、次に位置P3にある第２の
合流器14Bの合流比を67:33とすると、光ファイバ12の検
出端ですべての位置P1、P2、P3からの光信号のパワー
は、元の光信号のパワーを100とすると、33と等しくな
り、従ってすべての位置を同じ感度（SN比）で検出する
ことができる。これに反して、例えば、すべての光合流
器の合流比を50:50とすると、位置P1、P2からの光信号
のパワーは25となり、位置P3からの光信号のパワーは50
となり、特に遠方位置の感度が低下する。Next, the operation of the device of the present invention will be described. The electro-optical converters 16A and 16B provided at the positions to be detected are respectively shown.
Is not driven because the abnormal current detector does not operate while the steady current is flowing through the transmission line. When an accident such as a ground fault accident occurs in the transmission line, an abnormal current detector at that position operates, and one of the electro-optical converters 16A and 16B at the corresponding position is driven. Optical signal Sa or Sb of a specific frequency according to the position
Is introduced into the optical fiber 12 through one of the optical combiners 14A and 14B. Accordingly, at the detection end of the optical fiber 12, the optical signal Sa or Sb is converted into an electrical signal by the optical-electrical converter 18, and the frequency of the electrical signal is determined by the frequency analyzer.
The location of the accident is detected by analysis by 20. The optical signals from the electro-optical converters 16A and 16B are converted into optical multiplexers 14A and 14B.
The converging ratio when merging at ---, as already mentioned,
The detection end of the optical fiber 12 is set so that the powers of all optical signals are equal. For example, for simplicity of explanation, the merging ratio of the first optical combiners 14A which joins the optical signal from the position P 1 and the position P 2 to 50:50, then a second confluence in the position P 3 Assuming that the converging ratio of the optical device 14B is 67:33, the power of the optical signals from all the positions P 1 , P 2 , and P 3 at the detection end of the optical fiber 12 is 33 assuming that the power of the original optical signal is 100. , So that all positions can be detected with the same sensitivity (SN ratio). On the other hand, for example, if the converging ratio of all the optical couplers is 50:50, the power of the optical signal from the positions P 1 and P 2 is 25, and the power of the optical signal from the position P 3 is 50.
And the sensitivity particularly at a distant position is reduced.
本発明によれば、上記のように、光ファイバに機械的
な変形を与えることなく、光信号を合流器によって合流
させるので長期に亙って信頼性を維持することができ、
また電気−光変換器は送電線の地絡事故の如き検出すべ
き事象が発生した際にのみ駆動されるので消費電力が少
なく経済的に使用することができ、更に、光合流器の合
流比は各位置からの光信号のパワーが光ファイバの検出
端で等しくなるように設定されているので遠方からの光
信号のパワーだけが低くなることがないため、検出距離
を長くとることができる実益がある。According to the present invention, as described above, optical signals are combined by the merger without mechanically deforming the optical fiber, so that reliability can be maintained for a long time,
In addition, the electro-optical converter is driven only when an event to be detected such as a ground fault in a transmission line occurs, so that it can be used economically with low power consumption. Since the power of the optical signal from each position is set to be equal at the detection end of the optical fiber, only the power of the optical signal from a distant place does not decrease, so the detection distance can be increased. There is.
第１図は本発明に係る送電線の位置検出装置の概略系統
図、第２図は本発明の動作を説明する光信号の波形図で
ある。 10……送電線の位置検出装置、12……光ファイバ、14
A、14B……光合流器、16A、16B……電気−光変換器、18
……光−電気変換器、20……周波数分析器。FIG. 1 is a schematic system diagram of a transmission line position detecting device according to the present invention, and FIG. 2 is a waveform diagram of an optical signal for explaining the operation of the present invention. 10 ... Transmission line position detector, 12 ... Optical fiber, 14
A, 14B …… Optical combiner, 16A, 16B …… Electrical-optical converter, 18
…… Opto-electric converter, 20 …… Frequency analyzer.
Claims (1)
と、前記光ファイバに所定の間隔をあけて設けられて相
応する送電線の検出すべき位置で光信号を合流する複数
の光合流器と、各光合流器にそれぞれ相対して設置され
検出すべき事象が発生した際に相応する光合流器にそれ
ぞれ異なる周波数の強度変調光信号を発信する複数の電
気−光変換器と、前記光ファイバの検出端に接続されて
前記電気−光変換器が発信する光信号を受信する光−電
気変換器と、前記光−電気変換器の出力端に接続されて
受信された光信号の周波数を分析する周波数分析器とを
備え、前記複数の光合流器の合流比は前記光ファイバの
検出端で前記電気−光変換器から発信される光信号のパ
ワーがすべて等しくなるように設定されていることを特
徴とする送電線の位置検出装置。1. An optical fiber installed in parallel with a transmission line, and a plurality of optical junctions provided at a predetermined interval in the optical fiber and joining optical signals at positions to be detected by a corresponding transmission line. A plurality of electro-optical converters that are installed opposite to the respective optical combiners and transmit intensity-modulated optical signals of different frequencies to the corresponding optical combiners when an event to be detected occurs, An optical-to-electrical converter connected to a detection end of an optical fiber for receiving an optical signal transmitted by the electro-optical converter; and a frequency of the received optical signal connected to an output end of the optical-to-electrical converter. And a frequency analyzer for analyzing the optical coupler, wherein the converging ratio of the plurality of optical couplers is set such that the powers of the optical signals transmitted from the electro-optical converter at the detection end of the optical fiber are all equal. Power transmission line Detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14524789A JP2593555B2 (en) | 1989-06-09 | 1989-06-09 | Transmission line position detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14524789A JP2593555B2 (en) | 1989-06-09 | 1989-06-09 | Transmission line position detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0312565A JPH0312565A (en) | 1991-01-21 |
| JP2593555B2 true JP2593555B2 (en) | 1997-03-26 |
Family
ID=15380722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14524789A Expired - Lifetime JP2593555B2 (en) | 1989-06-09 | 1989-06-09 | Transmission line position detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2593555B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163428B (en) * | 2013-03-26 | 2016-03-30 | 昆明理工大学 | A kind of method improving Single Terminal Traveling Wave Fault Location reliability |
| CN106841915B (en) * | 2017-01-15 | 2020-03-10 | 东北电力大学 | Power transmission line fault positioning method based on compressed sensing |
| CN107091973B (en) * | 2017-07-05 | 2019-10-18 | 西南交通大学 | A kind of localization method of HVDC transmission line lightning strike spot and short circuit trouble point |
-
1989
- 1989-06-09 JP JP14524789A patent/JP2593555B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0312565A (en) | 1991-01-21 |
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