WO2007073686A1 - Dispositif permettant de detecter une defectuosite d'un cable - Google Patents

Dispositif permettant de detecter une defectuosite d'un cable Download PDF

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Publication number
WO2007073686A1
WO2007073686A1 PCT/CN2006/003587 CN2006003587W WO2007073686A1 WO 2007073686 A1 WO2007073686 A1 WO 2007073686A1 CN 2006003587 W CN2006003587 W CN 2006003587W WO 2007073686 A1 WO2007073686 A1 WO 2007073686A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
electromagnetic sensor
excitation power
fault
detected
Prior art date
Application number
PCT/CN2006/003587
Other languages
English (en)
Chinese (zh)
Inventor
Hong Jiang
Zhiheng Tian
Original Assignee
Hong Jiang
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hong Jiang filed Critical Hong Jiang
Publication of WO2007073686A1 publication Critical patent/WO2007073686A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/088—Aspects of digital computing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Definitions

  • the present invention relates to cable fault detection.
  • the general cable core is multi-strand. When one or several of the strands breaks, the cable swing caused by wind or other force will accelerate the break of the remaining strands near the breakpoint, eventually leading to the whole The root cable is broken. Therefore, it is very important to detect the slight breakage of the cable core in advance.
  • the existing cable fault detection method (ZL01216430.5, etc.) has low sensitivity and can only detect the breakage of the entire cable forming an open circuit.
  • An object of the present invention is to provide a detecting device capable of detecting a single-strand or partial-core core breakpoint in a multi-strand cable core, and improving the detection sensitivity of the cable insulation fault.
  • the object of the present invention is achieved by dislocation welding a set of wires between a multi-pin plug and a socket, bending the set of wires around the cable to be inspected and connecting the plugs on the wires to form a wrap.
  • the electromagnetic sensor of the cable to be tested is achieved by dislocation welding a set of wires between a multi-pin plug and a socket, bending the set of wires around the cable to be inspected and connecting the plugs on the wires to form a wrap.
  • the electromagnetic sensor of the cable to be tested.
  • the excitation power is applied to the coil of the electromagnetic sensor of the shunt capacitor.
  • Geely power is applied to the cable phase line being tested.
  • the senor for cable fault detection was close to the cable movement detection along the cable, and the sensitivity was low.
  • the invention utilizes the method of misalignment welding of the plug seat to conveniently surround the loop electromagnetic sensor around the detected cable to form a loop, thereby improving the measurement sensitivity.
  • a capacitor C is connected in parallel to the electromagnetic coil of the cable to be detected, and the excitation power frequency is adjusted away from the breakpoint, so that the coil having the inductance L and the capacitor C connected in parallel are in a resonance state.
  • the excitation power is applied to the phase line of the detected cable, and the ring-shaped electromagnetic sensor surrounding the cable moves along the detected cable, and the fault point can be detected according to the change of the sensor detection signal.
  • 1 is a schematic structural view of an electromagnetic sensor for cable fault detection
  • FIG. 2 is a schematic view of a cable core strand breaking detecting device
  • Figure 3 is a schematic diagram of a cable insulation fault detecting device.
  • the electromagnetic sensor (101) is formed by a set of wires (102) misaligned between the plug (103) and the socket (104), that is, the N-1 wires are from the first, second, third, ..., N-1 on the plug.
  • the cores are respectively led to the 2nd, 3rd, 4th...N cores on the socket, and the signal cable (105) of the sensor (101) is taken out at the first and Nth cores of the plug.
  • the set of wires (102) is bent into a ring around the multi-strand single-core cable (106) to be inspected, and the plug (103) and the socket (104) are butted together, and the wire set (102) is formed as an electromagnetic coil (102).
  • an electromagnetic sensor (101) for the detection cable (106) is formed.
  • the electromagnetic coil (102) has an insulating layer (108) externally, which can be similarly made into an electromagnetic sensor containing several electromagnetic coils.
  • the operation box (107) supplies the excitation power source (107a) therein to the electromagnetic coil (102) of the electromagnetic sensor (101) through the signal cable (105).
  • the frequency f of the excitation power source (107a) is adjusted at the entire portion of the detected cable so that the effective inductance L of the electromagnetic coil (102) surrounding the entire portion of the detected cable (106) is in resonance with the parallel capacitance C of the coil, LC
  • the impedance of the parallel circuit reaches a maximum.
  • the electromagnetic coil (102) moves along the detected cable (106) to a point (P) in which a break (one or several strands) occurs, the eddy current generated by the excitation power source (107a) in the detected cable (106) is lowered, The effective inductance of the electromagnetic coil (102) is increased to cause the LC parallel circuit to deviate from the resonance point, and the impedance of the LC parallel circuit is lowered.
  • This change is processed by the signal processing and display circuit (107b) in the operating box (107) to give a broken stock alarm signal and display the number of broken strands.
  • a second embodiment of the invention is illustrated in Figure 3.
  • the electromagnetic sensor (201) surrounding the detected cable (206) (including three phase lines and one ground line) is composed of a plug (203), a socket (204), and an electromagnetic coil (202) which is misaligned therebetween.
  • the excitation power supply (207a) applies a power source between the detected phase line (206a) of the detected cable (206) and the ground line (206b).
  • the electromagnetic sensor (201) moves along the detected cable (206).
  • the signal processing and display unit (207b) in the middle gives an alarm signal (in situ sound and light signal and remote signal).

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention concerne un dispositif permettant de détecter une défectuosité d'un câble. Ce dispositif se compose notamment d'un capteur électromagnétique (101, 201) qui vient se placer autour du câble à tester (106, 206), d'une source (107a, 207a) d'énergie d'excitation, d'un dispositif (107b) de traitement du signal et d'affichage, et d'un câble (105) de signalisation. Le capteur électromagnétique (101, 201) comprend des conducteurs (102, 202) qui sont montés par soudage entre un connecteur mâle (103, 203) et un connecteur femelle (104, 204) et raccordés à ces derniers.
PCT/CN2006/003587 2005-12-24 2006-12-25 Dispositif permettant de detecter une defectuosite d'un cable WO2007073686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510135895.0 2005-12-24
CNA2005101358950A CN1877351A (zh) 2005-12-24 2005-12-24 电缆故障检测装置

Publications (1)

Publication Number Publication Date
WO2007073686A1 true WO2007073686A1 (fr) 2007-07-05

Family

ID=37509840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/003587 WO2007073686A1 (fr) 2005-12-24 2006-12-25 Dispositif permettant de detecter une defectuosite d'un cable

Country Status (2)

Country Link
CN (1) CN1877351A (fr)
WO (1) WO2007073686A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8319628B2 (en) 2008-04-04 2012-11-27 Schweitzer Engineering Laboratories Inc Three-phase faulted circuit indicator

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ITUA20164207A1 (it) * 2016-06-08 2017-12-08 Gewiss Spa Modulo di controllo compatto, per dispositivi di riarmo automatico
CN106707108A (zh) * 2017-02-08 2017-05-24 浙江中新电力发展集团有限公司 一种基于导波技术的输配电设备全寿命周期的检测装置及其操作方法
CN108562987A (zh) * 2018-01-09 2018-09-21 惠安闽神石材加工设备开发有限公司 一种新型的架空光缆线路施工机具
CN111735851A (zh) * 2020-07-21 2020-10-02 国网山东省电力公司潍坊市寒亭区供电公司 一种电缆绝缘层在线监测装置及其监测方法
CN112179959B (zh) * 2020-11-02 2022-10-21 国家电网有限公司 一种高压电缆绝缘层破损检测装置及信号处理方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2062250A (en) * 1979-10-22 1981-05-20 Electrothermal Eng Ltd Detecting fault in insulated electric cable
CN1059063A (zh) * 1991-08-29 1992-02-26 陈喜文 排线电感加热带
JPH06235748A (ja) * 1993-02-10 1994-08-23 Sumitomo Electric Ind Ltd 電力ケーブルの事故点標定方法
US5894223A (en) * 1997-09-24 1999-04-13 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Non-intrusive cable tester
US6429661B1 (en) * 1999-12-09 2002-08-06 Edmund O. Schweitzer, Jr. Fault indicator for three-phase sheathed cable
JP2002228699A (ja) * 2001-01-30 2002-08-14 Mitsubishi Cable Ind Ltd ケーブルにパルス電圧を注入する方法及び装置
US6741081B1 (en) * 2003-03-04 2004-05-25 At&T Corp. Cable fault detector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2062250A (en) * 1979-10-22 1981-05-20 Electrothermal Eng Ltd Detecting fault in insulated electric cable
CN1059063A (zh) * 1991-08-29 1992-02-26 陈喜文 排线电感加热带
JPH06235748A (ja) * 1993-02-10 1994-08-23 Sumitomo Electric Ind Ltd 電力ケーブルの事故点標定方法
US5894223A (en) * 1997-09-24 1999-04-13 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Non-intrusive cable tester
US6429661B1 (en) * 1999-12-09 2002-08-06 Edmund O. Schweitzer, Jr. Fault indicator for three-phase sheathed cable
JP2002228699A (ja) * 2001-01-30 2002-08-14 Mitsubishi Cable Ind Ltd ケーブルにパルス電圧を注入する方法及び装置
US6741081B1 (en) * 2003-03-04 2004-05-25 At&T Corp. Cable fault detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8319628B2 (en) 2008-04-04 2012-11-27 Schweitzer Engineering Laboratories Inc Three-phase faulted circuit indicator

Also Published As

Publication number Publication date
CN1877351A (zh) 2006-12-13

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