CN103985297B - A kind of cable fault simulation and alignment system - Google Patents
A kind of cable fault simulation and alignment system Download PDFInfo
- Publication number
- CN103985297B CN103985297B CN201410235101.7A CN201410235101A CN103985297B CN 103985297 B CN103985297 B CN 103985297B CN 201410235101 A CN201410235101 A CN 201410235101A CN 103985297 B CN103985297 B CN 103985297B
- Authority
- CN
- China
- Prior art keywords
- cable
- electrode
- inlet wire
- circuit
- cable fault
- 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.)
- Active
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 34
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 13
- 238000001514 detection method Methods 0.000 description 7
- 238000012549 training Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000004807 localization Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The present invention relates to a kind of cable fault simulation and alignment system, go out line electrode including: cable fault simulation box, the electrode installing plate being located in cable fault simulation box, three inlet wire electrodes and three；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 outlet cable respectively；It is provided with in cable fault simulation box at inlet wire electrode with go out the resistance box simulating broken string, low-resistance, high resistant and arcing fault between line electrode, being provided with hv cable termination with the end going out the outlet cable that line electrode is connected；Hv cable termination is used for connecting cable fault positioning detector.This cable fault positioning detector includes: central control unit, for launching the impulse ejection circuit of pulse signal to tested cable, for receiving reflection receivable circuit and the High Speed Data Acquisition Circuit of the reflected signal from tested cable；The outfan of reflection receivable circuit is connected with the input of High Speed Data Acquisition Circuit.
Description
The application is application number: 200910309789.8, and invention and created name is " cable fault simulation and fault location system ", and 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 a kind of staff training cable fault simulation and fault location system.
Background technology
Power cable (hereinafter referred to as cable) is embedded in underground more, once break down, finds very difficult, often to take hours, the even time of several days, not only waste substantial amounts of human and material resources, and substantial amounts of electric quantity loss and worse social influence can be caused.How accurately, the problem that Method of Cable Trouble Point has just become power supply department growing interest is searched rapidly, economically.Cable fault scenario and to bury environment underground more complicated, change is many, and what tester should be familiar with cable buries trend and environment underground, judge cable fault character definitely, select suitable instrument and measuring 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 bigger development, as occurred in that the pulse temporal bounce technique of fault localization, the pulsed magnetic field method of path detection and utilizing the method etc. in magnetic field and acoustical signal time difference trouble-shooting point position.The application of computer technology, more makes detection of cable fault technology take on a completely new look, and enters the intelligent stage.
Power cable fault detection is the work that a technical comparison is strong, and tester should grasp the operation principle of institute's use instrument and to have certain working experience.Carry out the detection operations of cable fault, except buying the instrument and equipment of advanced person, also to carry out the training of tester.
Summary of the invention
The technical problem to be solved is to provide a kind of staff training cable fault simulation and fault location system.
For solving above-mentioned technical problem, a kind of cable fault simulation provided by the invention and alignment system, including: cable fault simulation box, the electrode installing plate being located 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 outlet cable respectively；Be provided with at inlet wire electrode with go out the resistance box simulating disconnection fault, low resistance faults, high resistive fault and arcing fault between line electrode in described cable fault simulation box, with described go out the end of outlet cable that is connected of line electrode be provided with hv cable termination；Hv cable termination is used for connecting cable fault positioning detector.This cable fault positioning detector includes: central control unit, be connected with central control unit for launching the impulse ejection circuit of pulse signal to tested cable, for the reflection receivable circuit that receives the reflected signal from described tested cable and the High Speed Data Acquisition Circuit being connected with the data acquisition input of central control unit；The outfan of reflection receivable circuit is connected with the input of High Speed Data Acquisition Circuit.
Be provided with in described cable fault simulation box be connected with each inlet wire electrode and the insulator that respectively goes out on line electrode for monitoring each inlet wire electrode and respectively going out the monitor of voltage status of line electrode.
Described inlet wire electrode is insulation cone with going out line electrode, is provided with the end electrode bar through the installing hole on electrode installing plate in it；The end of electrode bar is used for connecting cable core and by wrapped with insulation, and the bottom of insulation cone extends into the installing hole on described electrode installing plate, and the top of insulation cone is extended in the front end of electrode bar, and the front end of electrode bar is connected to bolt.
Described impulse ejection circuit includes: coupling transformer that the intervalometer being connected with the preset of central control unit and enabling signal outfan, the amplifying circuit being connected with the outfan of intervalometer, the pulse transformer being connected with the outfan of amplifying circuit and pulse transformer are coupled and internal driving balancing circuitry；First secondary coil of pulse transformer, the first primary coil of coupling transformer and internal driving balancing circuitry constitute loop；The second subprime coil of pulse transformer, the second primary coil of coupling transformer and tested cable constitute loop；The secondary coil of coupling transformer is connected with reflection receivable circuit.
The positive effect of the present invention: three inlet wire electrodes and three are gone out line electrode and are located in cable fault simulation box by (1) present invention, by resistance box between inlet wire electrode and inlet wire electrode, inlet wire electrode and the change in resistance that goes out between line electrode, and the connection change on phase line and ground, simulate all kinds of cable fault, then cable fault detection instrument is adopted to detect, thus meeting the requirement of staff training.(2) monitor is for the supervision of voltage status, to facilitate debugging.(3) cable fault detection instrument adopts the method detection cable fault type that pulse signal is launched and received, and realizes fault localization or location, simple in construction, easy to use.(4) the invention have the characteristics that: 1). intelligence degree is high.Whether can discharge automatic decision trouble point, calculate and show fault distance；There is Waveform storage, compare, amplify and the function such as operation indicating；And can adjust wave velocity according to different cable insulation media；Two movable cursor are provided, can distance between any two points in measured waveform.2). adopting linear current bonder measurement to flow through the pulsed current signal of ground wire, utilize with traditional flash tester resistance capacitance divider to measure compared with the method for pulse voltage signal, wiring is simple, convenient；Instrument and high tension loop are come from being electrically isolated, and safety is especially good.3). adopting rechargeable battery to power, volume is little, lightweight, easy to carry.Avoid traditional flash tester exists because sharing the interference problem that causes of alternating current power supply with high tension loop, it is ensured that instrument, under strong electromagnetic interference environment, reliably works when the sphere gap in high tension loop punctures or discharge in trouble point.4). adopt giant-screen dot matrix lcd, it is shown that waveform and the information stability such as fault distance clear, scalable contrast, and have backlight function, with under different outside light conditions, it is thus achieved that optimal display result.5). certainty of measurement is high, and when tested cable length is less than 1000m, absolute error is less than ± 1m；When cable length is more than 1000m, relative error is less than 0.5%.6). measure blind area little, cable can be determined and lift one's head the fault at 10m place.7). it is furnished with mini-printer interface, it is possible to print the information such as waveform, data that screen shows easily, it is simple to preserve data.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below according to specific embodiment and in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the front view of the cable fault simulation in embodiment and alignment system；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the cable fault simulation in embodiment and the structural representation bottom alignment system；
Fig. 4 is the cable fault simulation in embodiment and the electrode installing plate in alignment system, inlet wire electrode and the assembling structural representation going out line electrode；
Fig. 5 is the structural representation of the outlet cable in embodiment and hv cable termination；
Fig. 6 is the inlet wire electrode in embodiment and the structural representation going 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.
Detailed description of the invention
Seeing Fig. 1-9, a kind of cable fault simulation of the present embodiment and alignment system include: the electrode installing plate 5 be located at the cable fault simulation box 1 in concrete foundation 2, being located in cable fault simulation box 1 and three the inlet wire electrodes 6 being located 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 outlet cable 9 respectively.It is fixedly linked by lower margin and expansion bolt between described reinforced concrete foundation 2 and cable fault simulation box 1.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 outlet cable 9.It is provided with in cable fault simulation box 1 at inlet wire electrode 6 with go out the resistance box 10 simulating disconnection fault, low resistance faults, high resistive fault and arcing fault between line electrode 7.
Be provided with in described cable fault simulation box 1 be connected with each inlet wire electrode 6 and the insulator that respectively goes out on line electrode 7 for monitoring each inlet wire electrode 6 and respectively going out the monitor 11 of voltage status of line electrode 7.
With described go out the end of outlet cable 13 that is connected of line electrode 7 be provided with hv cable termination 12.
After setting a certain fault in cable fault simulation and alignment system, carrying out fault detect by the Cable fault examination position finder being connected on hv cable termination 12, be used conveniently and safely, practicality is good.
Described inlet wire electrode 6 is insulation cone with going out line electrode 7, is provided with the end electrode bar b through the installing hole on electrode installing plate 5 in it；The end of electrode bar b is used for connecting cable core d and wrapping up with insulant e.The bottom of described insulation cone extends into the installing hole on described electrode installing plate 5.The top of insulation cone a is extended in the front end of described electrode bar b, and the front end of electrode bar b is connected to bolt c.Insulant e is connected to earth lead.
Cable fault positioning detector includes: central control unit 30, be connected with central control unit 30 for launching the impulse ejection circuit 31 of pulse signal to tested cable, for the reflection receivable circuit 32 that receives the reflected signal from described tested cable and the High Speed Data Acquisition Circuit 33 being connected with the data acquisition input of central control unit 30；The outfan of reflection receivable circuit 32 is connected with the input of High Speed Data Acquisition Circuit 33.
Described central control unit 30 is also associated with printer 34, LCD35 and keyboard 36.
Described impulse ejection circuit 31 includes: coupling transformer T2 that the timer 21 being connected with the preset of central control unit 30 and enabling signal outfan, the amplifying circuit 22 being connected with the outfan of timer 21, the pulse transformer T1 being connected with the outfan of amplifying circuit 22 and pulse transformer T1 are coupled and internal driving balancing circuitry 23；The first secondary coil L3 of pulse transformer T1, the first primary coil L5 of coupling transformer T2 and internal driving balancing circuitry 23 constitute loop；The second subprime coil L2 of pulse transformer T1, the second primary coil L4 of coupling transformer T2 and tested cable constitute loop；The secondary coil L6 of coupling transformer T2 is connected with reflection receivable circuit 32.
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 detecting low resistance and the disconnection fault of cable, and measures length or the wave velocity of various cable.Pulse current working method is used for high resistant and the flashover type fault localization of cable.
The effect of central control unit 30 is: receive key-press input instruction, performs corresponding operation；The pulse current data taking out the pulse-echo waveform recorded or trouble point electric discharge from High Speed Data Acquisition Circuit 33 process；Information such as operation indicating, judged result and fault distances, deliver to and LCD35 shows；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 producing the 30V rectangular pulse of a preset width, and is sent to cable up by coupling transformer T2.Timer 21 is one can the subtraction count device of preset number.A number is put in advance to intervalometer by wanting central control unit 30, after impulse ejection circuit 31 receives the order that central control unit 30 sends startup transmitting, the level of one 5V of output, now timer 21 carries out subtraction count under clock signal control, namely often carrys out a clock pulses, and timer conter subtracts 1, after several pulses, enumerator reduces to 0, and timer 21 exports the level of a 0V, material is thus formed the 5V rectangular pulse with one fixed width.Difference according to the scope of measurement changes preset numerical value, and intervalometer just exports the pulse of different in width.
The rectangular pulse of the 5V of timer 21 output, the potential pulse of 30V it is enlarged into through amplifying circuit 22, it is applied to the primary coil L1 of pulse transformer T1 up, described coil L2 at pulse transformer T1, L3 is upper produces the potential pulse that size identical polar is contrary, it is added separately to test line and internal driving balancing circuitry 23, as close in internal balance circuit impedance and circuit-under-test natural impedance, then under exomonental effect, described coil L4 at coupling transformer T2, one size of the upper generation of L5 is close, opposite polarity current signal, the pickup electrode that L6 receives is weak, reach the purpose of compressed transmissions pulse.And when on tested cable, reflected impulse arrives, the voltage swing produced on described coil L3 and L5 is equal, in opposite direction, loop voltage algebraical sum is 0, internal balance circuit is inoperative, reflected impulse voltage is all transformed on described secondary coil L6 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 adjustable.Under pulse current working method, the pulsed current signal from linear current bonder is all transformed on described secondary coil L6 by the L4 of coupling transformer T2；It is added to reflection receivable circuit 32.
Analogue signal is taken point sampling according to certain frequency and the amplitude of extraction converts to digital quantity storage by High Speed Data Acquisition Circuit 33, recording impulse reflection or pulse current waveform.If realizing the resolution of ranging of 1m, it is desirable to the temporal resolution of waveform sample is about 10ns, and corresponding data acquiring frequency reaches 100MHz.The clock frequency of general central control unit 30 only tens megahertzs, is difficult to the A/D(analog quantity/digital quantity of direct control signal) change and storage.This device devises the ultrahigh speed 100MHz data acquisition circuit of uniqueness, and it, without the interference of central control unit 30, is automatically performed the sampling of pulse-echo waveform, changes and be temporarily stored in a data buffer zone.After a waveform recording completes, central control unit 30 takes out the data of the pulse-echo in data buffer zone or pulse current waveform by interface circuit, processes.
Above-described embodiment is only for clearly demonstrating example of the present invention, 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 cannot all of embodiment be given exhaustive.
Claims (1)
1. a cable fault simulation and alignment system, it is characterised in that including: cable fault simulation box (1), the electrode installing plate (5) being located 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 outlet cable respectively；Be provided with at inlet wire electrode (6) with go out the resistance box (10) simulating disconnection fault, low resistance faults, high resistive fault and arcing fault between line electrode (7) in described cable fault simulation box (1), with described go out the end of outlet cable that is connected of line electrode (7) be provided with hv cable termination (12)；Hv cable termination (12) is used for connecting cable fault positioning detector；
This cable fault positioning detector includes: what central control unit (30) was connected with central control unit (30) is used for launching the impulse ejection circuit (31) of pulse signal to tested cable, being used for the reflection receivable circuit (32) receiving the reflected signal from described tested cable and the High Speed Data Acquisition Circuit (33) being connected with the data acquisition input of central control unit (30)；The outfan of reflection receivable circuit (32) is connected with the input of High Speed Data Acquisition Circuit (33)；
It is provided with being used for of being connected with each inlet wire electrode (6) and the insulator that respectively goes out on line electrode (7) in described cable fault simulation box (1) monitor each inlet wire electrode (6) and respectively go out the monitor (11) of 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 end electrode bar (b) through the installing hole on electrode installing plate (5) in it；The end of electrode bar (b) is used for connecting cable core (d) and wrapping up with insulant (e), the bottom of insulation cone extends into the installing hole on described electrode installing plate (5), the top of insulation cone (a) is extended in the front end of electrode bar (b), and the front end of electrode bar (b) is connected to bolt (c)；
Described impulse ejection circuit (31) including: pulse transformer (T1) that the amplifying circuit (22) that the intervalometer (21) being respectively connected with the enabling signal outfan of the preset outfan of central control unit (30) and central control unit (30) is connected with the outfan of intervalometer (21) is connected with the outfan of amplifying circuit (22) and the coupling transformer (T2) that pulse transformer (T1) is coupled and internal driving balancing circuitry (23)；First secondary coil (L3) of pulse transformer (T1), first primary coil (L5) of coupling transformer (T2) and internal driving balancing circuitry (23) constitute loop；The second subprime coil (L2) of pulse transformer (T1), second primary coil (L4) of coupling transformer (T2) and tested cable constitute loop；The secondary coil (L6) of coupling transformer (T2) is connected with reflection receivable circuit (32).
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 |
Applications Claiming Priority (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 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910309789.8A Division CN101699540B (en) | 2009-11-16 | 2009-11-16 | Cable fault simulation and location system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103985297A CN103985297A (en) | 2014-08-13 |
| CN103985297B true CN103985297B (en) | 2016-06-29 |
Family
ID=51277249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410235101.7A Active CN103985297B (en) | 2009-11-16 | 2009-11-16 | A kind of cable fault simulation and alignment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103985297B (en) |
Families Citing this family (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 |
| 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 |
| 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 |
-
2009
- 2009-11-16 CN CN201410235101.7A patent/CN103985297B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103985297A (en) | 2014-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103985299B (en) | A kind of cable fault simulation and fault location system | |
| CN201600803U (en) | Fault location device for cable fault simulation system | |
| CN103336259B (en) | The detecting system of local discharge of gas-insulator switchgear detection sensor and method | |
| CN103617754B (en) | Power cable fault simulation test analogue system | |
| CN204044280U (en) | A kind of cable detection system | |
| CN105676066A (en) | Cable fault locating eliminating device and method | |
| CN110794329B (en) | Method for testing defect recognition capability of partial discharge live detector of combined electrical apparatus and switch cabinet | |
| CN103985297B (en) | A kind of cable fault simulation and alignment system | |
| CN103985298B (en) | A kind of cable fault simulation, alignment system | |
| CN207866954U (en) | Electric cable failure detector | |
| CN105785228A (en) | Multifunctional communication cable fault tester | |
| CN207232372U (en) | A kind of detection device of instrument for measuring partial discharge's device position error | |
| CN104569743A (en) | Testing instrument and method for communication information cable failure | |
| CN203759170U (en) | Detecting device for winding insulation states of electromagnetic current transformer | |
| CN201540659U (en) | Cable fault simulation system | |
| CN103116181A (en) | Seismic exploration system and seismometer | |
| CN209372981U (en) | Common mode test fixture with stitch contact detection function | |
| CN201540680U (en) | Cable fault simulation box | |
| CN109342840A (en) | Common mode test fixture and common mode test method with stitch contact detection function | |
| CN106526412B (en) | A kind of method and apparatus suitable for photovoltaic field direct current cables Earth design | |
| CN203894364U (en) | Simulation frequency-modulation series resonance testing device | |
| CN105911409A (en) | Fault testing instrument for communication cable | |
| CN105938172A (en) | Communication cable fault tester with wireless data extraction | |
| CN205450173U (en) | Cable fault signal enhancement reflector | |
| CN103698671B (en) | A kind of simulation frequency adjustment serial connection resonant testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Jian Inventor after: Lu Zheng Inventor after: Zhu Hui Inventor before: Xu Jian |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |