CN103985297A - Cable fault simulating and positioning system - Google Patents
Cable fault simulating and positioning system Download PDFInfo
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- CN103985297A CN103985297A CN201410235101.7A CN201410235101A CN103985297A CN 103985297 A CN103985297 A CN 103985297A CN 201410235101 A CN201410235101 A CN 201410235101A CN 103985297 A CN103985297 A CN 103985297A
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- 239000012212 insulator Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
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- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The invention relates to a cable fault simulating and positioning system. The cable fault simulating and positioning system comprises a cable fault simulating box, an electrode installing plate, three wire inlet electrodes and three wire outlet electrodes, wherein the electrode installing plate, the three wire inlet electrodes and the three wire outlet electrodes are arranged in the cable fault simulating box. The three wire inlet electrodes are respectively connected with a three-phase cable core in a wire inlet cable, and the three wire outlet electrodes are respectively connected with a three-phase cable core in a first wire outlet cable; a resistance box is arranged in the cable fault simulating box and used for simulating disconnection, low-resistance, high-resistance and flashover faults between the wire inlet electrodes and the wire outlet electrodes, the tail end of a second wire outlet cable connected with the wire outlet electrodes is provided with a high-voltage cable terminal, and the high-voltage cable terminal is used for being connected with a cable fault positioning detector. The cable fault positioning detector comprises a central control unit, an impulse emitting circuit, a reflection receiving circuit and a high-speed data collecting circuit, the impulse emitting circuit is used for emitting impulse signals to a detected cable, the reflection receiving circuit is used for receiving reflection signals from the detected cable, and the output end of the reflection receiving circuit is connected with the input end of the high-speed data collecting circuit.
Description
The application is that application number is: 200910309789.8, and invention and created name is " cable fault simulation and fault location system ", the applying date is: the divisional application of the application for a patent for invention on November 16th, 2009.
Technical field
The present invention relates to the technical field of staff training cable fault simulation equipment, specifically cable fault simulation and fault location system for a kind of staff training.
Background technology
Power cable (hereinafter to be referred as cable) is embedded in underground more, once break down, finds very difficult, often to spend a few hours, the even time of several days, not only waste a large amount of human and material resources, and can cause a large amount of electric quantity losses and worse social influence.How accurately, search rapidly, economically Method of Cable Trouble Point and just become the problem of power supply department growing interest.Cable fault situation and bury environment more complicated underground, variation is many, and what tester should be familiar with cable buries trend and environment underground, judge definitely cable fault character, select suitable instrument and measurement method, according to certain program work, could successfully measure Method of Cable Trouble Point.
In recent years, the measuring technology of power cable fault has had larger development, as has occurred the pulsed magnetic field method that the pulse time domain reflectometry, path of fault localization are surveyed and utilized magnetic field and the method for voice signal mistiming trouble-shooting point position etc.The application of computer technology, more makes detection of cable fault technology take on a completely new look, and has entered the intelligent stage.
It is the work that technical comparison is strong that power cable fault is surveyed, and tester should grasp the principle of work of institute's use instrument and will have certain working experience.Carry out the detection operations of cable fault, except buying advanced instrument and equipment, also will carry out tester's training.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of staff training cable fault simulation and fault location system.
For solving the problems of the technologies described above, a kind of cable fault simulation provided by the invention and positioning system, comprising: cable fault simulation box, be located at the electrode installing plate in cable fault simulation box and be located at three inlet wire electrodes on electrode installing plate and three go out line electrode; Three inlet wire electrodes are connected with the three-phase core in inlet wire cable respectively, and three go out line electrode and are connected with the three-phase core in the first outlet cable respectively; In described cable fault simulation box, be provided with at inlet wire electrode with have the resistance box of simulating disconnection fault, low-resistance fault, high resistive fault and arcing fault between line electrode, with described go out the end of the second outlet cable of being connected of line electrode be provided with hv cable termination; Hv cable termination is for stube cable localization of fault detector.This cable fault positioning detector comprises: central control unit, be connected with central control unit for the impulse ejection circuit to tested cable transponder pulse signal, for receiving from the reflection receivable circuit of the reflected signal of described tested cable and the High Speed Data Acquisition Circuit being connected with the data acquisition input end of central control unit; The output terminal of reflection receivable circuit is connected with the input end of High Speed Data Acquisition Circuit.
In described cable fault simulation box, be provided with each inlet wire electrode with respectively go out that insulator on line electrode is connected for monitoring each inlet wire electrode and respectively going out the monitor of the voltage status of line electrode.
Described inlet wire electrode is insulation cone with going out line electrode, is provided with the electrode bar of end through the mounting hole on electrode installing plate in it; The end of electrode bar is for stube cable heart yearn and use wrapped with insulation, and the bottom of insulation cone extends into the mounting hole on described electrode installing plate, and the front end of electrode bar extends the top of insulation cone, and the front end of electrode bar is connected with bolt.
Described impulse ejection circuit comprises: the timer being connected with enabling signal output terminal with the preset of central control unit, the amplifying circuit being connected with the output terminal of timer, the pulse transformer being connected with the output terminal of amplifying circuit, the coupling transformer and the internal driving balancing circuitry that are coupled with pulse transformer; The first secondary coil of pulse transformer, the first primary coil of coupling transformer and internal driving balancing circuitry form loop; The second subprime coil of pulse transformer, the second primary coil of coupling transformer and tested cable form loop; The secondary coil of coupling transformer is connected with impulse ejection circuit.
Good effect of the present invention: (1) the present invention goes out line electrode by three inlet wire electrodes and three and is located in cable fault simulation box, by resistance box between inlet wire electrode and inlet wire electrode, inlet wire electrode and go out the change in resistance between line electrode, and phase line and ground be connected variation, simulate all kinds of cable faults, then adopt cable fault detection instrument to detect, thereby meet the requirement of staff training.(2) monitor is for the supervision of voltage status, to facilitate debugging.(3) cable fault detection instrument adopts pulse signal transmitting and the method detection streamer fault type receiving, and realizes fault localization or location, simple in structure, easy to use.(4) the present invention has following characteristics: 1). and intelligent degree is high.Can automatic decision trouble spot whether discharge, calculate and show fault distance; There are the functions such as waveform storage, comparison, amplification and operation indicating; And can be according to the different cable insulation media wave velocity of adjusting; Two removable cursors are provided, can measured waveform on distance between any two points.2). adopt measurements of linear current coupling mechanism to flow through the pulsed current signal of ground wire, compared with the method for utilizing resistance capacitance divider ranging pulse voltage signal with traditional flash tester, wiring is simple, facilitate; Instrument and high tension loop are kept apart from electric, and security is good especially.3). adopt rechargeable battery power supply, volume is little, lightweight, easy to carry.Avoided existing in traditional flash tester because sharing with high tension loop the interference problem that AC power causes, ensured that instrument is under strong electromagnetic interference environment, puncture or work reliably when the electric discharge of trouble spot at the sphere gap of high tension loop.4). adopt giant-screen dot matrix lcd, the information stability such as waveform and fault distance demonstrating is clear, adjustable contrast, and there is backlight function, under the extraneous light condition different, obtain optimal display result.5). measuring accuracy is high, be less than ± 1m of absolute error in the time that tested cable length is less than 1000m; In the time that cable length is greater than 1000m, relative error is less than 0.5%.6). measure blind area little, can determine cable and lift one's head the fault at 10m place.7). be furnished with mini-printer interface, can print easily the information such as waveform, data of screen display, be convenient to preservation data.
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below the specific embodiment by reference to the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is the front view of the simulation of cable fault in embodiment and positioning system;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the structural representation bottom cable fault simulation and the positioning system in embodiment;
Fig. 4 is electrode installing plate, the inlet wire electrode in cable fault simulation and the positioning system in embodiment and the assembly structure schematic diagram that goes out line electrode;
Fig. 5 is the second outlet cable in embodiment and the structural representation of hv cable termination;
Fig. 6 is the inlet wire electrode in embodiment and the structural representation that goes out line electrode;
Fig. 7 is the B-B cross section view of Fig. 6;
Fig. 8 is the circuit block diagram of the cable fault positioning detector in embodiment;
Fig. 9 is the circuit block diagram of the impulse ejection circuit in Fig. 8.
Embodiment
See Fig. 1-9, the simulation of a kind of cable fault and the positioning system of the present embodiment comprise: be located at cable fault simulation box 1 in concrete foundation 2, be located at the electrode installing plate 5 in cable fault simulation box 1 and be located at three inlet wire electrodes 6 on electrode installing plate 5 and three go out line electrode 7; Three inlet wire electrodes 6 are connected with the three-phase core in inlet wire cable 8 respectively, and three go out line electrode 7 and are connected with the three-phase core in the first outlet cable 9 respectively.Between described reinforced concrete foundation 2 and cable fault simulation box 1, be fixedly linked by lower margin and expansion bolt.Described cable fault simulation box 1 two bottom sides is provided with penetration pipe 3, and cable fault simulation box 1 bottom center has perforate 4, and the front end face of cable fault simulation box 1 is provided with double door 14.
The insulator external shield ground connection of described inlet wire cable 8 and the first outlet cable 9.In cable fault simulation box 1, be provided with at inlet wire electrode 6 with have the resistance box 10 of simulating disconnection fault, low-resistance fault, high resistive fault and arcing fault between line electrode 7.
In described cable fault simulation box 1, be provided with each inlet wire electrode 6 with respectively go out that insulator on line electrode 7 is connected for monitoring each inlet wire electrode 6 and respectively going out the monitor 11 of the voltage status of line electrode 7.
With described go out the end of the second outlet cable 13 of being connected of line electrode 7 be provided with hv cable termination 12.
In cable fault simulation and positioning system, set after a certain fault, carry out fault detect by the Cable fault examination orientator being connected on hv cable termination 12, safety easy to use, practicality is good.
Described inlet wire electrode 6 is insulation cone with going out line electrode 7, is provided with the electrode bar b of end through the mounting hole on electrode installing plate 5 in it; The end of electrode bar b is for stube cable heart yearn d and use insulating material e parcel.The bottom of described insulation cone extends into the mounting hole on described electrode installing plate 5.The front end of described electrode bar b extends the top of insulation cone a, and the front end of electrode bar b is connected with bolt c.Insulating material e is connected with ground wire.
Cable fault positioning detector comprises: central control unit 30, be connected with central control unit 30 for the impulse ejection circuit 31 to tested cable transponder pulse signal, for receiving from the reflection receivable circuit 32 of the reflected signal of described tested cable and the High Speed Data Acquisition Circuit 33 being connected with the data acquisition input end of central control unit 30; The output terminal of reflection receivable circuit 32 is connected with the input end of High Speed Data Acquisition Circuit 33.
Described central control unit 30 is also connected with printer 34, LCD35 and keyboard 36.
Described impulse ejection circuit 31 comprises: the timer 21 being connected with enabling signal output terminal with the preset of central control unit 30, the amplifying circuit 22 being connected with the output terminal of timer 21, the pulse transformer T1 being connected with the output terminal of amplifying circuit 22, the coupling transformer T2 and the internal driving balancing circuitry 23 that are coupled with pulse transformer T1; The first primary coil L5 and the internal driving balancing circuitry 23 of the first secondary coil L3, the coupling transformer T2 of pulse transformer T1 form loop; The second primary coil L4 of second subprime coil L2, the coupling transformer T2 of pulse transformer T1 and tested cable form loop; The secondary coil L6 of coupling transformer T2 is connected with impulse ejection circuit 31.
Described cable fault positioning detector has action of low-voltage pulse reflection and two kinds of working methods of pulse current.Action of low-voltage pulse reflecting operating mode is for detection of low resistance and the disconnection fault of cable, and measures length or the wave velocity of various cables.Pulse current working method is for high resistant and the flashover type fault localization of cable.
The effect of central control unit 30 is: receive key-press input instruction, carry out operation accordingly; Process from the pulse-echo waveform of High Speed Data Acquisition Circuit 33 taking-up records or the pulse current data of trouble spot electric discharge; Information such as operation indicating, judged result and fault distances, deliver to the upper demonstration of LCD35; To whole system self-inspection, monitoring.
LCD35 is the delivery outlet of waveform, operation result or operation information.
Printer 34 is for printing the information on liquid crystal LCD35.
Impulse ejection circuit 31 is for generation of the 30V rect.p. of a preset width, and sends to cable by coupling transformer T2 and get on.Timer 21 be one can preset number down counter.Put in advance a number by wanting central control unit 30 to timer, impulse ejection circuit 31 receives central control unit 30 and sends after the order that starts transmitting, the level of a 5V of output, now timer 21 carries out subtraction counting under clock signal control, often carrys out a time clock, and timer conter subtracts 1, after several pulses, counter reduces to 0, and timer 21 is exported the level of a 0V, has so just formed the 5V rect.p. with certain width.Change preset numerical value according to the difference of measurement range, timer is just exported the pulse of different in width.
The rect.p. of the 5V that timer 21 is exported, be enlarged into the potential pulse of 30V through amplifying circuit 22, the primary coil L1 that is applied to pulse transformer T1 gets on, at the described coil L2 of pulse transformer T1, the contrary potential pulse of the L3 big or small identical polar of upper generation, be added to respectively test line and internal driving balancing circuitry 23, as close with circuit-under-test wave impedance in internal balance circuit impedance, under exomonental effect, at the described coil L4 of coupling transformer T2, size of the upper generation of L5 is close, opposite polarity current signal, a little less than the pickup electrode that L6 receives, reach the object of compressed transmissions pulse.And in the time that reflected impulse on tested cable arrives, equate with the voltage swing producing on L5 at described coil L3, opposite direction, loop voltage algebraic sum is 0, internal balance circuit is inoperative, reflected impulse voltage all transforms to described secondary coil L6 above by the second primary coil L4 of coupling transformer T2, is added in signal receiving circuit.
Reflection receivable circuit 32 is for receiving and amplifying from the signal on the secondary coil L6 of coupling transformer, gain amplifier capable of regulating.Under pulse current working method, all transform on described secondary coil L6 by the L4 of coupling transformer T2 from the pulsed current signal of linear current coupling mechanism; Be added to reflection receivable circuit 32.
High Speed Data Acquisition Circuit 33 is got point sampling and is converted the amplitude of extraction to digital quantity storage, recording impulse reflection or pulse current waveform simulating signal according to certain frequency.If realize the resolution of ranging of 1m, require the temporal resolution of waveform sample to be about 10ns, corresponding data acquiring frequency reaches 100MHz.The clock frequency of general central control unit 30 is only tens megahertzes, is difficult to the A/D(analog quantity/digital quantity of direct control signal) conversion and storage.This device has designed unique hypervelocity 100MHz data acquisition circuit, and it is without the interference of central control unit 30, automatically complete pulse-echo waveform sampling, change and be temporarily stored in a data buffer.After a waveform recording completes, central control unit 30 takes out pulse-echo in data buffer or the data of pulse current waveform by interface circuit, processes.
Above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.
Claims (1)
1. cable fault simulation and a positioning system, is characterized in that comprising: cable fault simulation box (1), be located at the electrode installing plate (5) in cable fault simulation box (1) and be located at three inlet wire electrodes (6) on electrode installing plate (5) and three go out line electrode (7); Three inlet wire electrodes (6) are connected with the three-phase core in inlet wire cable (8) respectively, and three go out line electrode (7) and are connected with the three-phase core in the first outlet cable (9) respectively; In described cable fault simulation box (1), be provided with at inlet wire electrode (6) with have a resistance box (10) of simulating disconnection fault, low-resistance fault, high resistive fault and arcing fault between line electrode (7), with described go out the end of the second outlet cable (13) of being connected of line electrode (7) be provided with hv cable termination (12); Hv cable termination (12) is for stube cable localization of fault detector;
This cable fault positioning detector comprises: central control unit (30), be connected with central control unit (30) for the impulse ejection circuit (31) to tested cable transponder pulse signal, for receiving from the reflection receivable circuit (32) of the reflected signal of described tested cable and the High Speed Data Acquisition Circuit (33) being connected with the data acquisition input end of central control unit (30); The output terminal of reflection receivable circuit (32) is connected with the input end of High Speed Data Acquisition Circuit (33);
In described cable fault simulation box (1), be provided with each inlet wire electrode (6) with respectively go out that insulator on line electrode (7) is connected for monitoring each inlet wire electrode (6) and respectively going out the monitor (11) of the voltage status of line electrode (7);
Described inlet wire electrode (6) and go out line electrode (7) for insulation cone (a), is provided with the electrode bar (b) of end through the mounting hole on electrode installing plate (5) in it; The end of electrode bar (b) is for stube cable heart yearn (d) and use insulating material (e) parcel, the bottom of insulation cone extends into the mounting hole on described electrode installing plate (5), the front end of electrode bar (b) extends the top of insulation cone (a), and the front end of electrode bar (b) is connected with bolt (c);
Described impulse ejection circuit (31) comprising: the amplifying circuit (22) being connected with the preset timer being connected with enabling signal output terminal (21) of central control unit (30), with the output terminal of timer (21), the pulse transformer (T1) being connected with the output terminal of amplifying circuit (22), the coupling transformer (T2) and the internal driving balancing circuitry (23) that are coupled with pulse transformer (T1); First secondary coil (L3) of pulse transformer (T1), first primary coil (L5) of coupling transformer (T2) and internal driving balancing circuitry (23) form loop; The second subprime coil (L2) of pulse transformer (T1), second primary coil (L4) of coupling transformer (T2) and tested cable form loop; The secondary coil (L6) of coupling transformer (T2) is connected with impulse ejection circuit (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410235101.7A CN103985297B (en) | 2009-11-16 | 2009-11-16 | A kind of cable fault simulation and alignment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410235101.7A CN103985297B (en) | 2009-11-16 | 2009-11-16 | A kind of cable fault simulation and alignment system |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910309789.8A Division CN101699540B (en) | 2009-11-16 | 2009-11-16 | Cable fault simulation and location system |
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| CN103985297A true CN103985297A (en) | 2014-08-13 |
| CN103985297B CN103985297B (en) | 2016-06-29 |
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| CN201410235101.7A Active CN103985297B (en) | 2009-11-16 | 2009-11-16 | A kind of cable fault simulation and alignment system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914353A (en) * | 2015-06-01 | 2015-09-16 | 苏州市华安普电力工程有限公司 | Power cable fault range finder device |
| CN105067964A (en) * | 2015-08-04 | 2015-11-18 | 华南理工大学 | Safety protection detecting method and device based on electrical pulse |
| CN106341196A (en) * | 2015-07-16 | 2017-01-18 | 苏州宝时得电动工具有限公司 | Breakpoint detection equipment and method |
-
2009
- 2009-11-16 CN CN201410235101.7A patent/CN103985297B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914353A (en) * | 2015-06-01 | 2015-09-16 | 苏州市华安普电力工程有限公司 | Power cable fault range finder device |
| CN106341196A (en) * | 2015-07-16 | 2017-01-18 | 苏州宝时得电动工具有限公司 | Breakpoint detection equipment and method |
| CN106341196B (en) * | 2015-07-16 | 2019-08-20 | 苏州宝时得电动工具有限公司 | Breaking point detection device and method |
| CN105067964A (en) * | 2015-08-04 | 2015-11-18 | 华南理工大学 | Safety protection detecting method and device based on electrical pulse |
| CN105067964B (en) * | 2015-08-04 | 2017-11-07 | 华南理工大学 | A kind of security protection detection method and device based on electric pulse |
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| Publication number | Publication date |
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| CN103985297B (en) | 2016-06-29 |
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