JPH0275977A - Investigating instrument for incident point of power supply line - Google Patents
Investigating instrument for incident point of power supply lineInfo
- Publication number
- JPH0275977A JPH0275977A JP22898488A JP22898488A JPH0275977A JP H0275977 A JPH0275977 A JP H0275977A JP 22898488 A JP22898488 A JP 22898488A JP 22898488 A JP22898488 A JP 22898488A JP H0275977 A JPH0275977 A JP H0275977A
- Authority
- JP
- Japan
- Prior art keywords
- current
- detector
- detectors
- distribution line
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 29
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
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、高電圧パルス印加法による架空配電線等の事
故点探査に使用する検出器付きの事故点探査装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fault point detection device equipped with a detector used for fault point detection in overhead power distribution lines, etc., using a high voltage pulse application method.
一般に、架空配電線路に接地事故等が生じた時は、高電
圧パルス印加法により事故点の探査を行なっている。こ
れは停電状態の線路区間に高電圧のパルスを印加し、接
地事故点を通って流れる線路のパルス電流を検出器付き
の事故点探査装置により検出するものである。Generally, when a grounding fault or the like occurs on an overhead power distribution line, a high voltage pulse application method is used to search for the fault point. This involves applying a high voltage pulse to a line section in a power outage state, and detecting the pulse current flowing through the line through the ground fault point using a fault point detection device equipped with a detector.
第5図は従来の事故点探査装置と該装置による事故点探
査を示す概略図である。同図において、lはコイル等を
用いて磁界を検出する検出器、2は上記検出器1により
検出された検出信号を接続ケーブル3を介して受信し、
信号処理した結果を図示しない表示器等で指示させる受
信装置であり、これらにより事故点探査装置4が構成さ
れている。FIG. 5 is a schematic diagram showing a conventional accident point detection device and accident point detection performed by the device. In the figure, l is a detector that detects a magnetic field using a coil or the like, 2 receives a detection signal detected by the detector 1 via a connecting cable 3,
This is a receiving device that indicates the result of signal processing on a display (not shown), etc., and constitutes an accident point searching device 4.
一方、5は配電線、6は大地、7,8はリード線、9は
高電圧パルス印加装置、10は共同地線、Rgは事故抵
抗、Pi、P2.P3.P4は電柱、Rpl、Rp2.
Rp3.Rp4は接地抵抗、I。On the other hand, 5 is a distribution line, 6 is ground, 7 and 8 are lead wires, 9 is a high voltage pulse application device, 10 is a common ground wire, Rg is a fault resistance, Pi, P2. P3. P4 is a telephone pole, Rpl, Rp2.
Rp3. Rp4 is a grounding resistance, I.
If、Ir、Ip2は電流の流れを示す。If, Ir, and Ip2 indicate current flow.
次に同図を用いてこの探査方式の原理を説明する。接地
事故が生じた停電状態の線路区間の配電VA5と大地6
の間に、リード線7.8を介して高電圧パルス発生器9
により高電圧パルスを印加する。例えば電柱P2で事故
抵抗Rgの事故が生じているものとすると、該パルス発
生器9からのパルス電流Iは事故抵抗Rgを経て、電柱
pi〜P2間の共同地線10を流れてパルス発生器9に
戻る電流Ifと、その反対側の共同地線IOを流れる電
流1rと、直ちに大地に流れ込む電流Ip2との3つに
分かれて流れる。従って、事故点探査装置4の検出器1
を配電線5と共同地線10との間に位置させて、配電線
5と共同地線10に流れる電流によって生じる磁界の合
成磁界を該パルス発生器9側から線路に沿い確認してい
けば、事故点を通り過ぎると配電線5にはパルス電流l
は流れず、共同地線10に流れる電流1rにより発生す
る磁界のみに・なるので、事故点が発見できる。なお、
配電綿5と検出器lとの距離は、三相−括に検出し、な
おかついずれの相で接地事故を起こしていても確実に検
出できることが必要で、実験的に60cffi程度とす
るのが最適距離という効果が得られている。Next, the principle of this exploration method will be explained using the same figure. Power distribution VA5 and ground 6 of the line section under power outage where the grounding accident occurred
During this time, the high voltage pulse generator 9 is connected via the lead 7.8.
A high voltage pulse is applied. For example, if a fault with fault resistance Rg has occurred at utility pole P2, the pulse current I from the pulse generator 9 passes through fault resistance Rg, flows through the common ground wire 10 between utility poles pi and P2, and flows to the pulse generator. The current If returns to the ground, the current 1r flows through the common ground wire IO on the opposite side, and the current Ip2 immediately flows into the ground. Therefore, the detector 1 of the accident point detection device 4
is located between the distribution line 5 and the common ground wire 10, and the composite magnetic field of the magnetic field generated by the current flowing through the distribution line 5 and the common ground wire 10 is confirmed along the line from the pulse generator 9 side. , after passing the fault point, a pulse current l flows through the distribution line 5.
does not flow, and only the magnetic field is generated by the current 1r flowing through the common ground wire 10, so the fault point can be found. In addition,
The distance between the distribution cotton 5 and the detector l needs to be able to detect the three phases collectively, and it is necessary to be able to reliably detect even if a grounding accident occurs in any phase, and experimentally it is optimal to set it to about 60 cffi. The effect of distance is obtained.
しかしながら、上記従来の事故探査装置によると複数回
線線路の上相の事故探査が非常に困難であった。However, according to the conventional fault detection device described above, fault detection in the upper phase of a multi-circuit line is extremely difficult.
以下、第6図に示す二回線線路において説明する0図に
おいて、検出器1は事故点探査を行なう上相回線5aか
ら通常の配電線の探査時と同じたけ離れた位置に置かれ
ている。つまり第1図の配電線5と検出器1の間の距離
と、第2図の二回線線路の下相回線5aと検出器lの間
の距離は同じである。上相回線5aと下相回線5bの距
離は一般的に90c11程度であるため、検出器lは二
回線線路の下相回線5bに近い位置に置かれることにな
る。この下相口W5bは、はとんどの場合健全相で交流
の高電圧が印加されているので、検出器lはそこに流れ
る交流電流1bによって生じる磁界の影響を受けて上相
口vA5aに流れるパルス電流Iを検出することが困難
となり、事故点の方向をほとんど判別できないという問
題点があった。6, the detector 1 is placed as far away from the upper phase line 5a where the fault point is being searched as it is when searching for a normal distribution line. That is, the distance between the power distribution line 5 and the detector 1 in FIG. 1 is the same as the distance between the lower phase line 5a of the two-line line and the detector l in FIG. 2. Since the distance between the upper phase line 5a and the lower phase line 5b is generally about 90c11, the detector 1 is placed at a position close to the lower phase line 5b of the two-circuit line. Since this lower phase opening W5b is in a healthy phase in most cases and a high alternating voltage is applied, the detector l is influenced by the magnetic field generated by the alternating current 1b flowing there, and the current flows to the upper phase opening vA5a. There was a problem in that it became difficult to detect the pulse current I, and the direction of the fault point could hardly be determined.
本発明は係る問題点を解決するためになされたもので、
複数回vA線路においても、確実に事故点探査を行なえ
る配電線の事故点探査装置を提供することを目的とする
ものである。The present invention was made to solve such problems,
It is an object of the present invention to provide a fault point detection device for a power distribution line that can reliably perform fault point detection even in a multi-current vA line.
本発明に係る配電線の事故点探査装置は、パルス電流に
より配電線に生じる磁界を検出する第1検出器より一定
距離離間した第2検出器を設けたものである。A fault point detection device for a power distribution line according to the present invention is provided with a second detector spaced a certain distance from a first detector that detects a magnetic field generated in a power distribution line by a pulsed current.
本発明においては、第1.第2両検出器間に事故点探査
を行なう配電線に隣接する非探査配電線を位置させるこ
とにより、第1検出器で検出された非探査配電線に流れ
る電流の検出信号は第2検出器で検出された非探査配電
線の検出信号で相殺され、事故点探査を行なう配電線に
流れるパルス電流だけが検出される。In the present invention, first. By locating a non-exploration distribution line adjacent to the distribution line for fault point investigation between the second detectors, the detection signal of the current flowing through the non-exploration distribution line detected by the first detector can be transmitted to the second detector. This is canceled out by the detection signal of the non-exploration distribution line detected in , and only the pulse current flowing through the distribution line where the fault point is being investigated is detected.
、以下、本発明を第1図ないし第4図に示す実施例゛に
もとづき説明する。第1図は本実施例による事故点探査
装置と該装置による二回線線路の事故点探査を示す概略
図であり、第5図及び第6図に示す従来例と同−又は相
当部分には同一符号を付してその説明は省略する。図に
おいて、11は検出器1と同様な検出器であり、本実施
例においては上記検出器1が第1検出器を、検出器11
が第2検出器をそれぞれ構成し、一定距離離間して設け
られている。第2図に検出器1,11にコイルを使用し
た場合の詳細を示す。検出器i、tiは全く同じ特性の
もので、直列に接続され、下相回線5aの事故点探査時
には隣接する下相回線5bに上下対称に配置される。The present invention will be explained below based on the embodiments shown in FIGS. 1 to 4. FIG. 1 is a schematic diagram showing the fault point detection device according to the present embodiment and the fault point detection of a dual circuit line by the device, and the same or equivalent parts are the same as the conventional example shown in FIGS. 5 and 6. Reference numerals are given and explanations thereof are omitted. In the figure, 11 is a detector similar to detector 1, and in this embodiment, the detector 1 is the first detector, and the detector 11 is the first detector.
constitute the second detectors, and are spaced apart from each other by a certain distance. FIG. 2 shows details when coils are used in the detectors 1 and 11. Detectors i and ti have exactly the same characteristics, are connected in series, and are vertically symmetrically arranged on the adjacent lower phase line 5b when searching for a fault point in the lower phase line 5a.
次に以上のように構成された本実施例の作用について第
3図及び第4図を用いて説明する。Next, the operation of this embodiment configured as described above will be explained using FIGS. 3 and 4.
第3図は下相回線5bに流れる交流電流[bにより発生
ずる磁界による作用を示し、第4図は上相同線5aに流
れるパルス電流Iにより発生する磁界による作用を示し
ている。なお、Vaは検出信号として検出器lに発生す
る起電力、vbは同じく検出信号として検出器11に発
生する起電力である。3 shows the effect of the magnetic field generated by the alternating current [b flowing in the lower phase line 5b, and FIG. 4 shows the effect of the magnetic field generated by the pulsed current I flowing in the upper phase line 5a. Note that Va is an electromotive force generated in the detector 1 as a detection signal, and vb is an electromotive force generated in the detector 11 as a detection signal.
第3図において、下相回線5bに流れる交流電流1bに
より矢印Aの向きに磁界が発生したとすると、2つの検
出器1.11は下相回線5bから同じ距離だけ離れてい
るので、発生する起電力va(!:vbは同じ大きさで
ある。しかし、2つの検出器1.11は直列に接続され
ているので、起電力の発生する向きが反対になって、全
体としての出力は、Va+Vb=0 (V)となり、
交流電流1bによる影響は相殺される。In Fig. 3, if a magnetic field is generated in the direction of arrow A by the alternating current 1b flowing through the lower phase line 5b, the two detectors 1.11 are the same distance away from the lower phase line 5b, so the magnetic field is generated. The electromotive force va(!:vb is the same magnitude. However, since the two detectors 1.11 are connected in series, the direction in which the electromotive force is generated is opposite, and the overall output is Va+Vb=0 (V),
The influence of the alternating current 1b is canceled out.
一方、第4図において、上相回線5aに流れるパルス電
流■により矢印Bの向きに磁界が発生したとすると、検
出器1.11に発生する起電力Vaとvbが同じ向きに
なるので全体としての出力は、lVa+Vbl>0
(V)となる。On the other hand, in Fig. 4, if a magnetic field is generated in the direction of arrow B due to the pulse current flowing through the upper phase line 5a, the electromotive force Va and vb generated in the detector 1.11 will be in the same direction, so the overall The output of lVa+Vbl>0
(V).
従って、本実施例によれば、二回線線路における上相同
線5aの事故点探査をする時に、下相回線5bに流れる
交流電流1bによる影響をなくすくとができるので、上
相回線5aに流れるパルス電流Iを確実に検出すること
ができる。Therefore, according to this embodiment, when searching for a fault point in the upper phase line 5a in a two-line line, it is possible to eliminate the influence of the alternating current 1b flowing in the lower phase line 5b. Pulse current I can be detected reliably.
なお、上記実施例においては二回線線路での事故点探査
について示したが、複数回線線路においても同様となる
。In addition, although the above-mentioned embodiment shows fault point detection on a two-circuit line, the same applies to a multi-line line.
以上説明したように本発明によれば、パルス電流により
配電線に生じる磁界を検出する第1検出器より一定距離
離間した第2検出器を設け、両検出器間に上記配電線と
隣接する非探査配電線を位置させて、第1検出器で検出
した非探査配電線に流れる電流の検出信号を第2検出器
で検出した非探査配?ilt線の検出・信号で相殺可能
としたので、複数回線線路においても、確実に事故点探
査を行なえる配電線の事故点探査装置を提供することが
できるという効果がある。As explained above, according to the present invention, a second detector is provided which is spaced a certain distance from a first detector that detects a magnetic field generated in a power distribution line by a pulse current, and a non-magnetic field adjacent to the power distribution line is provided between the two detectors. The detection signal of the current flowing in the non-exploration distribution line detected by the first detector is detected by the second detector when the exploration distribution line is located. Since it is possible to cancel the detection and signal of the ILT line, there is an effect that it is possible to provide a distribution line fault point detection device that can reliably perform fault point detection even in a multi-line line.
第1図は本発明による事故点探査装置の一実施例とこの
実施例による二回線線路の事故点探査を示す概略図、第
2図は上記実施例の詳細図、第3図及び第4図は上記実
施例の作用説明図、第5図及び第6図は従来例を示す概
略図である。
l・・・第1検出器、4・・・事故点探査装置、5a・
・・配電線、5b・・・非探査配電線、11・・・第2
検出器、■・・・パルス電流、Va、Vb・・・検出信
号。
なお、図中向−又は相当部分には同一符号を用いている
。
代理人 大 岩 増 雄(ほか2名)第2図
第3図 第4図
va、vb:gtn
手続補正書(自発)FIG. 1 is a schematic diagram showing an embodiment of the fault point detection device according to the present invention and fault point detection on a dual circuit line according to this embodiment, FIG. 2 is a detailed diagram of the above embodiment, and FIGS. 3 and 4. is an explanatory diagram of the operation of the above embodiment, and FIGS. 5 and 6 are schematic diagrams showing a conventional example. l...First detector, 4...Fault point search device, 5a.
... Distribution line, 5b... Non-exploration distribution line, 11... Second
Detector, ■...Pulse current, Va, Vb...Detection signal. It should be noted that the same reference numerals are used for or corresponding parts in the drawings. Agent Masuo Oiwa (and 2 others) Figure 2
Figure 3 Figure 4 VA, VB: gtn Procedural amendment (voluntary)
Claims (1)
より上記配電線に生じる磁界を第1検出器で検出するこ
とにより事故点を探査する配電線の事故点探査装置であ
って、上記第1検出器より一定距離離間した第2検出器
を設け、両検出器間に上記配電線と隣接する非探査配電
線を位置させて、第1検出器で検出した非探査配電線に
流れる電流の検出信号を第2検出器で検出した非探査配
電線の検出信号で相殺可能としたことを特徴とする配電
線の事故点探査装置。A distribution line fault point detection device for detecting a fault point by detecting a magnetic field generated in the distribution line by a pulse current supplied to an arbitrary distribution line of a plurality of circuit lines with a first detector, the first detector A second detector is provided a certain distance away from the detector, and a non-exploration distribution line adjacent to the above-mentioned distribution line is located between both detectors, and the current flowing in the non-exploration distribution line detected by the first detector is detected. 1. A distribution line failure point detection device, characterized in that the signal can be offset by a detection signal of a non-explored distribution line detected by a second detector.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22898488A JPH0656403B2 (en) | 1988-09-13 | 1988-09-13 | Accident point detection device for distribution lines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22898488A JPH0656403B2 (en) | 1988-09-13 | 1988-09-13 | Accident point detection device for distribution lines |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0275977A true JPH0275977A (en) | 1990-03-15 |
JPH0656403B2 JPH0656403B2 (en) | 1994-07-27 |
Family
ID=16884947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22898488A Expired - Lifetime JPH0656403B2 (en) | 1988-09-13 | 1988-09-13 | Accident point detection device for distribution lines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0656403B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5430529A (en) * | 1993-01-28 | 1995-07-04 | Kabushiki Kaisha Toshiba | Developing unit |
-
1988
- 1988-09-13 JP JP22898488A patent/JPH0656403B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5430529A (en) * | 1993-01-28 | 1995-07-04 | Kabushiki Kaisha Toshiba | Developing unit |
Also Published As
Publication number | Publication date |
---|---|
JPH0656403B2 (en) | 1994-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2617269B2 (en) | Device for measuring current in overhead high-voltage lines | |
CN108027393A (en) | Double gap current sensor for multiphase conducting system | |
EP0358483A3 (en) | An automatic field ground detector and locator | |
JPH0275977A (en) | Investigating instrument for incident point of power supply line | |
JPH03185362A (en) | Current transformer | |
JPH09152462A (en) | Partial discharge detection method for transformer | |
JPH07123329B2 (en) | Three-phase AC exciter | |
JPS57182643A (en) | Tester for eddy current | |
JPS62261078A (en) | Detection of fault point for cable | |
JPS63163174A (en) | Detection of zero-phase current of pipe type three-phase of cable | |
JPH01206269A (en) | Zero phase current detector and zero phase current and voltage detector | |
JPH09149661A (en) | Parallel inverter system and current balancer | |
JP2598984B2 (en) | Earth leakage detector | |
JPH08196033A (en) | Method, device, and apparatus for orienting faulty section of transmission distribution line | |
EP1198717B1 (en) | Apparatus and method for fault detection on conductors | |
JPH0862264A (en) | Insulation resistance measuring device for power cable | |
JPH01153977A (en) | Investigating method for accident point of multiple earth distribution line | |
JP2568097B2 (en) | Power cable accident section detection method | |
JPS62255880A (en) | Discriminating method for accident section of power cable | |
JPS62255881A (en) | Discriminating method for accident section of power cable | |
JPH04208868A (en) | Uninterruptible insulation diagnostic apparatus | |
SU928264A1 (en) | Method of determination of conductor short-circuiting location in cable line | |
JP2679191B2 (en) | Cable ground fault probe | |
JPH01296173A (en) | Method for locating accident section of overhead transmission line | |
JPS61138178A (en) | Ground-fault detector |