WO2007073686A1 - A device for detecting the fault of the cable - Google Patents
A device for detecting the fault of the cable Download PDFInfo
- 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
- 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.)
- Ceased
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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
Description
电缆故障检测装置 技术领域 Cable fault detection device
本发明涉及电缆故障检测。 The present invention relates to cable fault detection.
背景技术 Background technique
—般的电缆芯线是多股的， 当其中的一股或几股出现断头时， 由 风力或其它作用力引起的电缆摆动将加速断点附近其余股芯线的断 伤， 最终导致整根电缆芯线断伤。 因此， 提前检测到电缆芯线的轻度 破损是非常重要的。 现有的电缆故障检测方法 （ZL01216430.5 等） 的灵敏度低， 只能检测形成开路的整根电缆的断头。 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.
发明内容 Summary of the invention
本发明的目的是提供一种可以检测多股电缆芯线中单股或部分 股芯线断点的检测装置， 并提高电缆绝缘故障的检测灵敏度。 SUMMARY OF THE INVENTION 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.
本发明的目的是这样实现的，将一组导线错位焊接在多芯插头和 插座之间，将该组导线环绕待检测电缆弯成环状并将导线上的插头座 对接起来， 即构成一个环绕待检测电缆的电磁传感器。 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.
激励电源施加在并联电容的电磁传感器的线圈上。 The excitation power is applied to the coil of the electromagnetic sensor of the shunt capacitor.
吉利电源施加在被检测的电缆相线上。 Geely power is applied to the cable phase line being tested.
以往的电缆故障检测用的传感器接近电缆沿电缆移动检测，灵敏 度低。本发明利用插头座错位焊接的方法可以很方便地将环形电磁传 感器环绕在被检测电缆之外构成环路， 从而提高了测量灵敏度。 In the past, the sensor 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.
环绕待检测电缆的电磁线圈上并联一个电容 C，在远离断点处调 节激励电源频率， 使具有电感 L的线圈与并联的电容 C处于谐振状 态。 当传感器移动到多股电缆的断股处时， 由于断股处电缆 线的 涡流减小， 传感器线圈的有效电感 L上升， 被施加激励电源的 LC并 联电路偏离谐振而阻抗降低， 由此检测出断股地点。 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. When the sensor moves to the strand of the multi-strand cable, due to the cable at the strand As the eddy current decreases, the effective inductance L of the sensor coil rises, and the LC parallel circuit to which the excitation power is applied deviates from resonance and the impedance decreases, thereby detecting the break position.
在检测电缆的绝缘或短路故障时，将激励电源施加在被检测电缆 相线上， 环绕电缆的环形电磁传感器沿被检测电缆移动， 根据传感器 检测信号的变化即可检测到故障点。 When detecting the insulation or short-circuit fault of the cable, 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.
附图说明 DRAWINGS
本发明如图 1〜图 3所示； The present invention is shown in Figures 1 to 3;
图 1是电缆故障检测用的电磁传感器的结构示意图； 1 is a schematic structural view of an electromagnetic sensor for cable fault detection;
图 2是电缆芯线断股检测装置示意图； 2 is a schematic view of a cable core strand breaking detecting device;
图 3是电缆绝缘故障检测装置示意图。 Figure 3 is a schematic diagram of a cable insulation fault detecting device.
具体实施方式 detailed description
本发明的第一个实施例如图 1〜图 2所示。 电磁传感器 （101 ) 由一组导线 （102)在插头 （103 )和插座（104)之间错位焊接而成， 即将 N-1根导线从插头上的第 1、 2、 3…… N-1芯分别引到插座上的 第 2、 3、 4…… N芯上， 并在插头的第 1和第 N芯引出传感器（101 ) 的信号电缆（105)。将该组导线（102)环绕待检测多股单芯电缆（106) 弯成环状并将插头 （103 ) 和插座 （104) 对接起来， 导线组 (102)即 形成为电磁线圈 (102)， 连同插头座 (103、 104)及信号电缆 (105)就构成 了检测电缆 （106) 的电磁传感器 （101 )。 电磁线圈 (102)外有绝缘层 ( 108 ) ，类似地可以制做成含几个电磁线圈的电磁传感器。 操作箱 ( 107)将其中的激励电源 （107a)通过信号电缆 （105 )给电磁传感 器（101 ) 的电磁线圈 （102)送电。 在被检测电缆的完整部位调节激 励电源（107a) 的频率 f， 使环绕被检测电缆 （106)完整部位的电磁 线圈（102)的有效电感 L与该线圈的并联电容 C处于谐振状态， LC 并联电路阻抗达最大值。 当电磁线圈 （102)沿被检测电缆（106)移 动到出现断股 （一股或几股） 点 （P) 时， 激励电源 （107a) 在被检 测电缆（106) 中产生的涡电流降低， 电磁线圈 （102) 的有效电感加 大而使 LC并联电路偏离谐振点， LC并联电路的阻抗降低。 这种变 化经操作箱 （107) 中的信号处理和显示电路 （107b) 处理后给出断 股报警信号并显示出断伤的股数。 A first embodiment of the present invention is shown in Figs. 1 to 2 . 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). Together with the connector (103, 104) and the signal cable (105), 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. When 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.
本发明的第二个实施例如图 3所示。 环绕被检测电缆（206) (含 3根相线和 1根地线）的电磁传感器 (201 )由插头（203)、插座 (204) - 以及在其间错位焊接的电磁线圈 （202) 构成。 激励电源 （207a) 将 电源施加在被检测电缆 (206) 的被检测相线 (206a)与地线 (206b) 之间。 电磁传感器（201 )沿被检测电缆 （206)移动， 当移动到绝缘 破损或接地故障点时， 由激励电源 （207a) 在电磁线圈 （202) 上感 应的信号将发生突变，操作箱（207)中的信号处理和显示单元（207b) 即给出报警信号 （就地声光信号和远程信号）。 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). When moving to the insulation breakage or ground fault point, the signal induced by the excitation power source (207a) on the electromagnetic coil (202) will be abrupt, and the operation box (207) The signal processing and display unit (207b) in the middle gives an alarm signal (in situ sound and light signal and remote signal).
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510135895.0 | 2005-12-24 | ||
| CNA2005101358950A CN1877351A (en) | 2005-12-24 | 2005-12-24 | Cable fault detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007073686A1 true WO2007073686A1 (en) | 2007-07-05 |
Family
ID=37509840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2006/003587 Ceased WO2007073686A1 (en) | 2005-12-24 | 2006-12-25 | A device for detecting the fault of the cable |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1877351A (en) |
| WO (1) | WO2007073686A1 (en) |
Cited By (1)
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITUA20164207A1 (en) * | 2016-06-08 | 2017-12-08 | Gewiss Spa | COMPACT CONTROL MODULE, FOR AUTOMATIC RESET DEVICES |
| CN106707108A (en) * | 2017-02-08 | 2017-05-24 | 浙江中新电力发展集团有限公司 | Detection device for full life cycle of transmission and distribution equipment based on guided wave technology and operating method thereof |
| CN108562987A (en) * | 2018-01-09 | 2018-09-21 | 惠安闽神石材加工设备开发有限公司 | A kind of novel aerial optical cable line construction machine |
| CN111983518A (en) * | 2020-04-24 | 2020-11-24 | 上海国荃自动化科技有限公司 | A cable disconnection detection device |
| CN111735851A (en) * | 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 | On-line monitoring device and monitoring method for cable insulation layer |
| CN112179959B (en) * | 2020-11-02 | 2022-10-21 | 国家电网有限公司 | High-voltage cable insulating layer damage detection device and signal processing method |
Citations (7)
| 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 (en) * | 1991-08-29 | 1992-02-26 | 陈喜文 | Induction heater |
| JPH06235748A (en) * | 1993-02-10 | 1994-08-23 | Sumitomo Electric Ind Ltd | Accident point location method for power cables |
| 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 (en) * | 2001-01-30 | 2002-08-14 | Mitsubishi Cable Ind Ltd | Method and apparatus for injecting pulse voltage into cable |
| US6741081B1 (en) * | 2003-03-04 | 2004-05-25 | At&T Corp. | Cable fault detector |
-
2005
- 2005-12-24 CN CNA2005101358950A patent/CN1877351A/en not_active Withdrawn
-
2006
- 2006-12-25 WO PCT/CN2006/003587 patent/WO2007073686A1/en not_active Ceased
Patent Citations (7)
| 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 (en) * | 1991-08-29 | 1992-02-26 | 陈喜文 | Induction heater |
| JPH06235748A (en) * | 1993-02-10 | 1994-08-23 | Sumitomo Electric Ind Ltd | Accident point location method for power cables |
| 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 (en) * | 2001-01-30 | 2002-08-14 | Mitsubishi Cable Ind Ltd | Method and apparatus for injecting pulse voltage into cable |
| US6741081B1 (en) * | 2003-03-04 | 2004-05-25 | At&T Corp. | Cable fault detector |
Cited By (1)
| 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 (en) | 2006-12-13 |
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