JPS60263869A - Detecting device for accident point on power transmission line - Google Patents
Detecting device for accident point on power transmission lineInfo
- Publication number
- JPS60263869A JPS60263869A JP12030984A JP12030984A JPS60263869A JP S60263869 A JPS60263869 A JP S60263869A JP 12030984 A JP12030984 A JP 12030984A JP 12030984 A JP12030984 A JP 12030984A JP S60263869 A JPS60263869 A JP S60263869A
- Authority
- JP
- Japan
- Prior art keywords
- steel tower
- current transformer
- current
- transmission line
- ground fault
- 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
- Locating Faults (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は送電線の事故点を鉄塔の構成枠体を流れる電流
により検出する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a device for detecting a fault point on a power transmission line based on a current flowing through a frame of a steel tower.
「従来技術」
従来、送電線路の一部で地絡、相関短絡等の電気的事故
が発生した場合、その事故点の探索は人力によって行な
われている。このため、自然条件の厳しい山間部、へき
地などに架設されている送電線の場合には、事故点の発
見確認が困難で多大の労力と時間とが必要になるという
問題がある。"Prior Art" Conventionally, when an electrical fault such as a ground fault or correlated short circuit occurs on a part of a power transmission line, the search for the fault point has been carried out manually. For this reason, in the case of power transmission lines installed in mountainous areas, remote areas, etc. with severe natural conditions, there is a problem in that finding and confirming fault points is difficult and requires a great deal of effort and time.
「発明の目的」
本発明は前記の問題を有利に解決したもので、事故点を
鉄塔毎またはその径間等において正確に位置検出するこ
とができ、また、設置が簡単で実用性の高い事故点検出
装置を提供するものである。``Object of the Invention'' The present invention advantageously solves the above-mentioned problems, and can accurately detect the location of the accident point on each tower or its span, and is easy to install and highly practical. A point detection device is provided.
「発明の構成」
前述の目的を達成するため、本発明は、鉄塔の一部にそ
の構成枠体を一次導体とする変流器を設けて、送′に線
事故時の異常電流を検出することを特徴とするものであ
る。"Structure of the Invention" In order to achieve the above-mentioned object, the present invention provides a current transformer in which a part of a steel tower has its constituent frame as a primary conductor, and detects abnormal current in the transmission line at the time of a line fault. It is characterized by this.
「実施例」
以下、本発明の一実施例を第1図および第2図に基づい
て説明すると、事故点検出に供される鉄塔IA、IB、
1cの構成枠体の一部に、これを−次導体とする変流路
2が上相腕金3よりも上方の位置と、下相腕金4よりも
下方の位置とのように上下に離間した2個所の位置に設
けられ、変流器2の二次には、第2図に示すたうに二次
電流の大きさが後述する設定限度を越えたかどうかを検
出するための比較器5が接続され、この比較器5にはサ
ージアブソーバなどの同時保護手段や出力信号のレベル
をはシ一定とする出力手段等が備えられており、この出
力部に発光ダイオード等の発光器6が接続されるととも
に、その発光は受光部7によって光ファイバ8とへ導か
れ、そして、これら変流器2.比較器52発光器6.受
光部7等で各鉄塔IA、IB、10毎の検出部9が構成
される。また、各検出部9は、架空地線10に内蔵させ
た光ファイバ等lこよって送電線路に沿って送電線の両
端局にそれぞれ接続され、端局において。"Embodiment" Hereinafter, an embodiment of the present invention will be described based on FIG. 1 and FIG. 2.
1c, a flow transformer path 2 using this as a -order conductor is arranged vertically such that one is above the upper phase arm 3 and the other is below the lower phase arm 4. A comparator 5 is provided at two separate locations, and the secondary of the current transformer 2 is provided with a comparator 5, as shown in FIG. is connected to the comparator 5, and this comparator 5 is equipped with simultaneous protection means such as a surge absorber, output means for keeping the level of the output signal constant, etc., and a light emitter 6 such as a light emitting diode is connected to this output section. At the same time, the emitted light is guided by the light receiving section 7 to the optical fiber 8, and the current transformers 2. Comparator 52 Emitter 6. The light receiving section 7 and the like constitute a detection section 9 for each steel tower IA, IB, and 10. Further, each detection section 9 is connected to both end stations of the power transmission line along the power transmission line through an optical fiber or the like built into the overhead ground wire 10, and is connected to both end stations of the power transmission line at the end stations.
光/電変換器11を介して位置判定器(例えば中央処理
装置)12により各検出部9毎の情報が処理され、どの
位置で地絡、相間短絡等の異常が発生したかを表示部1
3により知るものである。Information for each detection unit 9 is processed by a position determiner (for example, a central processing unit) 12 via a photo/electrical converter 11, and the display unit 1 indicates at which position an abnormality such as a ground fault or a short circuit between phases has occurred.
This is known from 3.
次いで1通常状態および事故発生時に変流器2に流れる
電流等について検討する。Next, we will discuss the current flowing through the current transformer 2 in the normal state and when an accident occurs.
通常の負荷電流が各相電線U、V、Wに流れている状態
を考えるさ、それぞれの変流器2が設けられている位置
は、第1図に示すように電線U。Considering the state in which normal load current is flowing through each phase wire U, V, and W, each current transformer 2 is installed at the wire U as shown in FIG.
Wから上方または下方に離れているため、変流器2の一
次導体とされている鉄塔1の構成枠体に流れる電流は、
主として電線Uまたは電線Wの負荷電流によってその周
囲に発生する磁束と、構成枠体とが交差することによっ
て発生する循環電流iである。したがって、変流器2の
二次電流の設定限度を、送電線の定格電流の例えば10
倍の過電流によって発生ずる循環電流iをめてこのとき
の二次電流値と定めておき、この設定限度を越えたとき
に比較器5から信号を出力させて1発光器7を作動させ
る設定をして、通常の負荷電流の範囲では検出部9から
信号(光)が出力されないようにしておく。The current flowing through the frame of the tower 1, which is the primary conductor of the current transformer 2 because it is away from W, is
This is mainly the circulating current i generated by the intersection of the magnetic flux generated around the electric wire U or W by the load current and the component frame. Therefore, the setting limit of the secondary current of the current transformer 2 is set to, for example, 10% of the rated current of the power transmission line.
The circulating current i generated by the double overcurrent is determined as the secondary current value at this time, and when this set limit is exceeded, a signal is output from the comparator 5 and the first light emitter 7 is activated. This is done so that no signal (light) is output from the detection unit 9 within the normal load current range.
一方、地絡事故が発生した状態を考えると、例えば第1
図実線で示すように雷撃が鉄塔IBの付近に位置する架
空地[10に加わったとすると、落雷時の放電々流の大
部分は地絡事故点x4ご近い鉄塔IBの構成枠体を流れ
る。このときの放電々流の一部は、変流器2の一次導体
である構成枠体を流れるときもに、流れる時間が短かく
直流成分を含むものであるが、電流の絶対値が前記循環
電流五よりも極端に大きくなる。したがって、地絡事故
の発生は、鉄塔IBの上下位置に設けられている変流器
2によってそれぞれ捕捉され、かつ、捕捉された電流値
が設定限度を確実に超えるため。On the other hand, considering the situation where a ground fault has occurred, for example,
As shown by the solid line in the diagram, if a lightning strike is applied to the overhead ground [10] located near the steel tower IB, most of the electrical discharge during the lightning strike will flow through the structural frame of the steel tower IB near the ground fault point x4. A part of the discharge current at this time, when flowing through the component frame which is the primary conductor of the current transformer 2, has a short flow time and contains a DC component, but the absolute value of the current is smaller than the circulating current 5. becomes extremely large. Therefore, the occurrence of a ground fault is detected by the current transformers 2 provided at the upper and lower positions of the steel tower IB, and the captured current value surely exceeds the set limit.
鉄塔IBの検出部9から異常発生信号が2つ出力され、
この上下両方の信号が出力さ卦たことを条件として地絡
事故発生が検出される。また、地絡事故点Xの発生位置
によっては、放電々流が分岐することにより、両側の鉄
塔IA、ICの検出部9からも異常発生信号が出力され
ることがあり得るが、複数の検出部9から異常発生信号
が位置判定器12に送られた場合は、複数の検出部9の
中間位置に地絡事故点Xがあるというように判定されて
、表示がなされる。Two abnormality occurrence signals are output from the detection unit 9 of the steel tower IB,
The occurrence of a ground fault is detected on the condition that both the upper and lower signals are output. Furthermore, depending on the location of the ground fault point When an abnormality occurrence signal is sent from the section 9 to the position determination device 12, it is determined that the ground fault point X is located at an intermediate position between the plurality of detection sections 9, and a display is made.
次いで、相関短絡事故が発生した状態を考えると、相関
短絡事故と同時に地絡事故が発生した場合は、地絡電流
の一部を下方に位置する変流器2により捕捉し得るため
、前述した地絡事故の単独発生に準じて短絡事故点Yを
検出するこ七ができる。また、地絡をともなわない相関
短絡事故の場合を考えると、鉄塔IB、ICの間に位置
する電線Uおよび電線V間で、第1図鎖線で示すように
相関短絡事故が発生した場合は、短絡事故点Yより左方
が電源側であるとすれば、短絡事故点Yより左方に位置
する電線U、Vには定格電流の例えば数十倍の短絡電流
が流れる。この短絡電流によって発生する磁束と構成枠
体とが交差するため、上方に位置する変流器2によって
循環電流を捕捉する。短絡事故時の循環電流は、前述し
た設定限度を越えるため、短絡事故点Yよりも左方に位
置する各検出部9から異常発生信号が出力されるととも
に、短絡事故点Yよりも右方に位置する検出部9からは
信号が出力されないことになる。これらの結果に基づい
て、各検出部9に異常発生信号有無の境界が生じること
と、上下の変流器2の一方のみで異常発生信号を出力す
ることとにより、短絡事故点Yの位置を鉄塔IB、10
の間というようIこ検出することができるのである。Next, considering the situation in which a correlated short circuit fault occurs, if a ground fault fault occurs at the same time as a correlated short circuit fault, a portion of the ground fault current can be captured by the current transformer 2 located below. The short circuit fault point Y can be detected based on the occurrence of a single ground fault fault. Furthermore, considering the case of a correlated short-circuit accident that does not involve a ground fault, if a correlated short-circuit accident occurs between electric wire U and electric wire V located between towers IB and IC, as shown by the chain line in Figure 1, If the power supply side is to the left of the short-circuit point Y, a short-circuit current of, for example, several tens of times the rated current flows through the electric wires U and V located to the left of the short-circuit point Y. Since the magnetic flux generated by this short-circuit current intersects with the component frame, the circulating current is captured by the current transformer 2 located above. Since the circulating current at the time of a short circuit exceeds the set limit mentioned above, an abnormality occurrence signal is output from each detection section 9 located to the left of the short circuit fault point Y, and an abnormality signal is output from each detection section 9 located to the left of the short circuit fault point Y. No signal will be output from the located detection section 9. Based on these results, the position of the short-circuit fault point Y can be determined by creating a boundary between the presence and absence of an abnormality occurrence signal in each detection unit 9 and by outputting an abnormality occurrence signal from only one of the upper and lower current transformers 2. Steel tower IB, 10
It is possible to detect the distance between the two.
そして、第1図および第2図例では、変流器2の二次電
流が比較器5および発光器6の駆動源とされて、例えば
バッテリー等の補助電源を使用することなく光信号を出
力するようになっている。In the examples of FIGS. 1 and 2, the secondary current of the current transformer 2 is used as a drive source for the comparator 5 and the light emitter 6, and outputs an optical signal without using an auxiliary power source such as a battery. It is supposed to be done.
また、変流器2は、鉄心分割型等、鉄塔構成枠体を解体
することなく取りつけ得るものが好適である。Further, it is preferable that the current transformer 2 be of a split-core type or the like, which can be installed without dismantling the tower-constituting frame.
なお、第1図および第2図例では、各鉄塔毎に検出部9
を設けるとともζこ、地絡および相聞短絡 4゜を両方
検出するものとした力ξ検出部9を鉄塔の数本置きに設
けたり、地絡または相間短絡専用の変流器を設けたりす
ることもできる。また、変流器の取付場所は、地絡事故
検出専用の場合、鉄塔構成枠体の任意の位置1個所とす
ることができ、一方、相関短絡検出を主目的とする場合
、鉄塔構成枠体のうち各相電線近傍等としてもよい。In addition, in the example of FIG. 1 and FIG. 2, the detection unit 9 is installed for each steel tower.
In addition to installing a force detection unit 9 that detects both ground faults and phase-to-phase short circuits, it is necessary to install force detection units 9 at every few towers, or to install a current transformer specifically for ground faults or phase-to-phase short circuits. You can also do that. In addition, if the current transformer is used only for ground fault detection, it can be installed at any one location on the tower component frame.On the other hand, if the main purpose is to detect correlated short circuits, the current transformer can be installed at any one location on the tower component frame. It may also be located near each phase electric wire.
「発明の効果」
以上説明したように本発明によれば1次のような効果を
奏することができる。"Effects of the Invention" As explained above, according to the present invention, the following effects can be achieved.
■ 地絡および相関短絡事故点を鉄塔毎程度の高精度で
検出部により検出し、送電線端局等で事故発生と同時に
事故点の位置を知ることができる。■ Ground faults and correlated short circuit fault points can be detected with high precision for each tower by the detection unit, and the location of the fault point can be known at the same time as an accident occurs at a power transmission line terminal station, etc.
■ このため、送電線の架設地域を問わず事故発生の有
無を常時容易に確認し得、保線作業労力を大幅に低減す
ることができる。■ Therefore, regardless of the area where the power transmission line is installed, it is possible to easily check whether an accident has occurred at any time, and the labor involved in maintaining the line can be significantly reduced.
■ 変流器を鉄塔構成枠体に取りつける等の作業を簡単
に行ない得て、既設送電線にも適用容易である等、実用
性が高い。■ It is highly practical as it allows easy work such as attaching the current transformer to the steel tower frame and can be easily applied to existing power transmission lines.
図面は本発明の一実施例を示すもので、第1図は変流器
取付位置および事故点等を併記した送電線の概略図、第
2図は装置の構成説明図である。
IA、IB、IC・・・・・・鉄塔、2・・・・・・変
流器、9・・・・・・検出部。
出願人藤倉電線株式会社The drawings show one embodiment of the present invention, and FIG. 1 is a schematic diagram of a power transmission line showing current transformer mounting positions and fault points, etc., and FIG. 2 is an explanatory diagram of the configuration of the device. IA, IB, IC... Steel tower, 2... Current transformer, 9... Detection section. Applicant Fujikura Electric Wire Co., Ltd.
Claims (1)
枠体を一次導体として鉄塔に流れる電流を検出する変流
器(2)を設けた送電線の事故点検出装置。A fault point detection device for a power transmission line, which is equipped with a current transformer (2) on a part of a transmission line tower (CIA, IB, IC) that detects the current flowing through the tower using its component frame as a primary conductor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12030984A JPS60263869A (en) | 1984-06-12 | 1984-06-12 | Detecting device for accident point on power transmission line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12030984A JPS60263869A (en) | 1984-06-12 | 1984-06-12 | Detecting device for accident point on power transmission line |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60263869A true JPS60263869A (en) | 1985-12-27 |
Family
ID=14783044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12030984A Pending JPS60263869A (en) | 1984-06-12 | 1984-06-12 | Detecting device for accident point on power transmission line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60263869A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63201572A (en) * | 1987-02-18 | 1988-08-19 | Fuji Electric Co Ltd | Accident point detection system |
CN106443361A (en) * | 2016-11-14 | 2017-02-22 | 深圳供电局有限公司 | Method, device and system for monitoring online abnormity in power grid |
-
1984
- 1984-06-12 JP JP12030984A patent/JPS60263869A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63201572A (en) * | 1987-02-18 | 1988-08-19 | Fuji Electric Co Ltd | Accident point detection system |
CN106443361A (en) * | 2016-11-14 | 2017-02-22 | 深圳供电局有限公司 | Method, device and system for monitoring online abnormity in power grid |
CN106443361B (en) * | 2016-11-14 | 2019-04-16 | 深圳供电局有限公司 | Method, device and system for monitoring online abnormity in power grid |
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