JP2568097B2 - Power cable accident section detection method - Google Patents
Power cable accident section detection methodInfo
- Publication number
- JP2568097B2 JP2568097B2 JP62320496A JP32049687A JP2568097B2 JP 2568097 B2 JP2568097 B2 JP 2568097B2 JP 62320496 A JP62320496 A JP 62320496A JP 32049687 A JP32049687 A JP 32049687A JP 2568097 B2 JP2568097 B2 JP 2568097B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- power cable
- detection method
- section detection
- cable
- 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] この発明は、クロスボンド接地方式の三相電力ケーブ
ル線路における電力ケーブルの事故区間検出方法に関す
るものである。Description: TECHNICAL FIELD The present invention relates to a method for detecting a faulty section of a power cable in a cross-bond grounding type three-phase power cable line.
[従来の技術] 第3図の場合において、ケーブル線路10の事故点12で
地絡事故が発生すると、サージ電流14が左右に進行す
る。[Prior Art] In the case of FIG. 3, when a ground fault occurs at an accident point 12 of the cable line 10, a surge current 14 progresses left and right.
それをケーブル線路10の両端においてCT16で検出し、
到達時間の差から事故点を標定する。It is detected by CT16 at both ends of the cable line 10,
The accident point is located based on the difference in arrival time.
[発明が解決しようとする問題点] しかしこの方法は、機構が複雑でコスト高、汎用性が
ない、などの点で問題がある。[Problems to be Solved by the Invention] However, this method has problems in that the mechanism is complicated, the cost is high, and the versatility is not.
[問題点を解決するための手段] この発明は、第1図のように、 (1)各接続箱31,32,−−−−間において、各相ケーブ
ル20の導体22とシース24とを流れる事故時の電流を、CT
51,52,−−−などにより各相ごとに一括して測定し、 (2)その測定結果を同じ相の隣接区間の測定結果と比
較する、 という方法により、確実に事故区間を標定できるように
したものである。[Means for Solving the Problems] As shown in FIG. 1, the present invention provides (1) the conductor 22 and the sheath 24 of each phase cable 20 between the connection boxes 31, 32, ---. The current at the time of an accident
51,52, ---, etc. are used to collectively measure each phase, and (2) the measurement result is compared with the measurement result of the adjacent section of the same phase, so that the fault section can be reliably located. It is the one.
なお、一括して測定するというのは、導体とシースの
事故電流の、ベクトル和をとるという意味である。Note that collectively measuring means obtaining the vector sum of the fault currents of the conductor and the sheath.
[実施例] 第1図において、 20はケーブルの全体を示し、22はケーブル導体、23は
その接続部、24はケーブルシースである。[Embodiment] In FIG. 1, reference numeral 20 denotes the entire cable, 22 is a cable conductor, 23 is a connecting portion thereof, and 24 is a cable sheath.
26と28は電源。 26 and 28 are power supplies.
31,32,33,−−−−は接続箱である。 31, 32, 33, ----- are junction boxes.
なお、A、B、Cの各相を区別する必要のあるとき
は、各符号の次にA、B、Cを付けて示すことにする。In addition, when it is necessary to distinguish each phase of A, B, and C, A, B, and C will be attached next to each code.
これらのうち、31,33,34などは絶縁接続箱で、40はシ
ースの縁切り部、42はクロスボンド線を示す。Among these, 31, 33, 34 and the like are insulating junction boxes, 40 is an edge portion of the sheath, and 42 is a cross bond line.
また、32,35などは普通接続箱で、44は接地線であ
る。Also, 32 and 35 are ordinary junction boxes, and 44 is a grounding wire.
各接続箱間において、ケーブル導体22とケーブルシー
ス24とを流れる事故電流を一括して測定するために、た
とえば、第2図のように、接続箱31などの横のケーブル
20上に、CT51,52,53,−−−−をとりつける。In order to collectively measure the fault current flowing through the cable conductor 22 and the cable sheath 24 between the connection boxes, for example, as shown in FIG.
Attach CT51,52,53, ---- on 20.
なお、A、B、Cの各相を区別する必要のあるとき
は、各符号の次にA、B、Cを付けて示すことにする。In addition, when it is necessary to distinguish each phase of A, B, and C, A, B, and C will be attached next to each code.
各CT51,52,−−−−の出力を光フアイバ60により伝送
装置(子局)62に送り、各子局62の情報を親局64に集め
判別する。The output of each CT 51, 52, --- is sent to the transmission device (slave station) 62 by the optical fiber 60, and the information of each slave station 62 is collected in the master station 64 for discrimination.
[作 用] たとえばA相の接続箱33〜34間の事故点66で、地絡事
故が発生したものとする。[Operation] For example, it is assumed that a ground fault occurs at the accident point 66 between the A-phase junction boxes 33 to 34.
CT53Aのところでは、流れる導体電流Iとシース電流
iの位相が180゜逆転しているので、その測定値はゼロ
(0)である。At the CT53A, the phase of the flowing conductor current I and the phase of the sheath current i are reversed by 180 °, so the measured value is zero (0).
これに対して、事故区間の両隣の、CT52Aと54Aのとこ
ろでは、事故の導体電流Iは流れるが、シース電流i
は、ボンド線42を通って他の相に移ってA相には流れな
いので、その測定値は非常に大(1)である。On the other hand, at the CT52A and 54A on both sides of the faulty section, the fault conductor current I flows but the sheath current i
Does not flow to the other phase through the bond wire 42 and does not flow into the A phase, so the measured value is very large (1).
すなわち、CT52A、53A、54Aの測定値は: (1)、(0)、(1) となる。 That is, the measured values of CT52A, 53A, 54A are: (1), (0), (1).
このように隣接する3つの測定値が: (1)、(0)、(1) と変化するところは外にない。 There is no place where three adjacent measurement values change as follows: (1), (0), (1).
そこで、このような変化を示した区間のうち、(0)
を示した区間に事故が発生したことが分る。Therefore, (0) of the sections showing such changes
It can be seen that an accident occurred in the section indicated by.
[発明の効果] 事故区間、事故相が判別できるので、詳細な事故区間
検出が可能になる。[Effect of the Invention] Since the accident section and the accident phase can be discriminated, detailed accident section detection becomes possible.
特に目視点検のできない管路部に適する。 Especially suitable for pipelines that cannot be visually inspected.
第1図は本発明の実施例の説明図で、 第2図はCTのとりつけ方の説明図、 第3図は従来技術の説明図。 20:ケーブル、22:ケーブル導体 24:ケーブルシース、26,28:電源 31,32,33,−−−:接続箱 40:縁切り部、42:ボンド線 44:接地線 51,52,53,−−−:CT 60:光フアイバ、62:伝送装置(子局) 64:親局、66:事故点 FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of how to mount a CT, and FIG. 3 is an explanatory diagram of a conventional technique. 20: Cable, 22: Cable conductor 24: Cable sheath, 26, 28: Power supply 31, 32, 33, − − −: Connection box 40: Edge cut part, 42: Bond wire 44: Ground wire 51, 52, 53, − -: CT 60: Optical fiber, 62: Transmission device (slave station) 64: Master station, 66: Accident point
Claims (1)
線路の事故区間を検出するに際して、各接続箱間におい
て、各相ケーブルの導体とシースとに流れる事故電流
を、各相ごとに一括して測定し、 当該測定結果を同じ相の隣接区間の測定結果と比較する
ことを特徴とする、電力ケーブルの事故区間検出方法。1. When detecting a faulty section of a cross-bond grounding type three-phase power cable line, fault currents flowing in the conductors and sheaths of the cables of each phase between the connection boxes are collectively described for each phase. A method of detecting a faulty section of a power cable, which comprises measuring and comparing the measurement result with a measurement result of an adjacent section of the same phase.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62320496A JP2568097B2 (en) | 1987-12-18 | 1987-12-18 | Power cable accident section detection method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62320496A JP2568097B2 (en) | 1987-12-18 | 1987-12-18 | Power cable accident section detection method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01162171A JPH01162171A (en) | 1989-06-26 |
JP2568097B2 true JP2568097B2 (en) | 1996-12-25 |
Family
ID=18122098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62320496A Expired - Lifetime JP2568097B2 (en) | 1987-12-18 | 1987-12-18 | Power cable accident section detection method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2568097B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9617606D0 (en) * | 1996-08-22 | 1996-10-02 | Radiodetection Ltd | Cable fault monitoring system |
CN106324417A (en) * | 2016-08-23 | 2017-01-11 | 安徽博达通信工程监理有限责任公司 | Electrical control line bearing and electrical signal detecting type long-distance cable |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5721670A (en) * | 1980-07-14 | 1982-02-04 | Tomoharu Ishikawa | Swiming pool |
-
1987
- 1987-12-18 JP JP62320496A patent/JP2568097B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH01162171A (en) | 1989-06-26 |
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