CN102809716B - Impulse method cable's fault locating emulation mode - Google Patents
Impulse method cable's fault locating emulation mode Download PDFInfo
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- CN102809716B CN102809716B CN201210292503.1A CN201210292503A CN102809716B CN 102809716 B CN102809716 B CN 102809716B CN 201210292503 A CN201210292503 A CN 201210292503A CN 102809716 B CN102809716 B CN 102809716B
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Abstract
The present invention provides a kind of impulse method cable's fault locating emulation mode, and the method includes: sets up cable threedimensional model, and sets up, according to the characterisitic parameter of tested cable, the mode that pulse signal transmits in the cable；Fictionalize the three-dimensional case of cable's fault locating instrument, and on this three-dimensional case, set three-dimensional button and three-dimensional display screen；Response user, by the instruction of three-dimensional key-press input, generates incident pulse signal according to the width parameter prestored；Calculate the time difference between incident pulse signal and reflected impulse according to mode, and the waveform of incident pulse and reflected impulse is shown on three-dimensional display screen；Calculate position of failure point according to time difference, trouble point correspondence position on cable threedimensional model is shown.The technology of the present invention, it is achieved that visual cable's fault locating emulates, gets rid of for cable fault and provides important visual reference, it is ensured that the safety of power supply, improve the efficiency of safeguard work, have high promotional value.
Description
Technical field
The present invention relates to Simulating technique in Electric Power System, particularly relate to a kind of impulse method cable's fault locating emulation
Method.
Background technology
Cable is the key equipment that large size city electrical network transmits electric power.Cable occurs insulation defective scarce in running
Sunken meeting causes cable can not normally transmit electric power and cause the probability of large-area power-cuts.Cable's fault locating is
The detection of power system cable relation technological researching, operational defect, the important means of enforcement repair based on condition of component.
Cable's fault locating has multiple method, and wherein impulse method full automatic cable inspection of fault is one therein,
Impulse method is to launch the distance-finding method of action of low-voltage pulse to failure cable, is suitable for cable break and low resistance faults is surveyed
Seek.Currently for impulse method cable's fault locating technology, seek skill generally by survey based on physical equipment
Art, owing to using physical equipment, needs to take a large amount of site facility, and needs to be equipped with physical equipment and cause
Cost is high, needs to carry out surveying target-seeking efficiency to cable scene low.
Summary of the invention
Based on this, it is necessary to ask for traditional impulse method cable's fault locating technical costs is high, inefficient
Topic, it is provided that a kind of impulse method cable's fault locating emulation mode.
A kind of impulse method cable's fault locating emulation mode, comprises the steps:
Utilize virtual reality technology to set up cable threedimensional model, and set up arteries and veins according to the characterisitic parameter of tested cable
Rush the mode that signal transmits in the cable；
Virtual reality technology is utilized to fictionalize the three-dimensional case of cable's fault locating instrument, and at this three-dimensional case
The three-dimensional button of upper setting and three-dimensional display screen；
Response user, by the instruction of described three-dimensional key-press input, generates incident arteries and veins according to the width parameter prestored
Rush signal；
The time difference between described incident pulse signal and corresponding reflected impulse is calculated according to described mode
Value, and the waveform of described incident pulse and reflected impulse is shown on described three-dimensional display screen；
The position of Method of Cable Trouble Point is calculated, by described trouble point at cable threedimensional model according to described time difference
Upper correspondence position shows.
Above-mentioned impulse method cable's fault locating emulation mode, the process of exemplary pulse method cable's fault locating, with
Virtual reality technology combines, by setting up visual cable model and instrument models, in l-G simulation test mistake
Journey can realize visual displaying, it is achieved that visual cable's fault locating emulates, for cable fault
Get rid of and provide important visual reference, it is ensured that the safety of power supply, improve the efficiency of safeguard work,
There is high promotional value.
Accompanying drawing explanation
Fig. 1 is the impulse method cable's fault locating emulation mode flow chart of an embodiment；
Fig. 2 is the equivalent circuit diagram of cable.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the impulse method cable's fault locating emulation mode of the present invention is made
Describe in detail.
Fig. 1 shows the impulse method cable's fault locating emulation mode flow chart of an embodiment, mainly includes
Following steps:
Step S100, virtual reality technology is utilized to set up cable threedimensional model, and according to the characteristic of tested cable
Parameter sets up the mode that pulse signal transmits in the cable；
Step S200, virtual reality technology is utilized to fictionalize the three-dimensional case of cable's fault locating instrument, and
Three-dimensional button and three-dimensional display screen is set on this three-dimensional case；
Step S300, the response user instruction by described three-dimensional key-press input, according to the width parameter prestored
Generate incident pulse signal；
Step S400, according to described mode calculate described incident pulse signal and corresponding reflected impulse it
Between time difference, and the waveform of described incident pulse and reflected impulse is carried out on described three-dimensional display screen
Display；
Step S500, according to described time difference calculate Method of Cable Trouble Point position, by described trouble point at electricity
On cable threedimensional model, correspondence position shows.
In order to become apparent from the technology of the present invention, preferred embodiment described below.
For in step S100, virtual reality technology is utilized to set up the process of cable threedimensional model:
Specifically, with tested cable as prototype, according to ratio and the color of each parts, utilize 3DMAX soft
Part fictionalizes cable threedimensional model, and wherein, described cable threedimensional model is made up of three-phase, including both sides three-phase
End, terminals, oversheath, armor, earth lead, bracket component.
For in step S100, set up what pulse signal transmitted in the cable according to the characterisitic parameter of tested cable
The process of mode:
First, cable performance data in running is analyzed, obtains by resistance, conductance, electricity
Sense and the equivalent circuit of electric capacity composition；
Specifically, cable is monitored at running, reads the typical data of its real time execution, typical case
Data are analyzed, and set up the equivalent circuit being made up of resistance, conductance, inductance and electric capacity about cable；
Owing to pulse row ripple is during cable transmission, affected by the electric field of cable own, cable is decomposed
Become resistance, conductance, inductance and the equivalent circuit of electric capacity composition, as in figure 2 it is shown, R in figure0For unit length
Resistance, L0For the inductance of unit length, G0For the susceptance of unit length, R0, G0Existence can cause ripple
Shape produces decay, works as R0=0、G0When=0, cable is lossless cable, and it is right to be realized by equivalent circuit
The height emulation of cable properties, improves emulation and surveys target-seeking accuracy.
Then, according to described equivalent circuit obtain the computing formula of velocity of wave that pulse signal transmits in the cable and
Waveform attenuating coefficient；
Such as, for lossless cable, its velocity of wave
Single conductor overhead transmission line is come
Say, its
Wherein, μ0For magnetic capacity, ε0For dielectric constant.
For in step S200, virtual reality technology is utilized to fictionalize the three-dimensional case of cable's fault locating instrument,
And three-dimensional button and the process of three-dimensional display screen are set on this three-dimensional case, mainly make the three of instrument
Dimension shell, three-dimensional part, and the function of set parts, specifically include:
First, with the external structure of cable's fault locating instrument as prototype, 3DMAX software is utilized to fictionalize
The three-dimensional case of instrument；
Specifically, use 3DMAX business software according to FH-8630 type cable's fault locating instrument length,
Wide, high proportionate relationship sets up detecting instrument three-dimensional case, according to the length and width ratio of shell and on instrument
Position, note dark color base map on the three-dimensional case of instrument.
Then, described three-dimensional case fictionalizes three-dimensional button, three-dimensional display screen figure；Wherein, three-dimensional
Button includes on and off switch, test button, numeral keys etc., it addition, in order to reach more life-like virtual effect
Really, it is also possible to make other such as male components such as union joint, measurement wiring, measurement ground connection.
3rd, set up a plane coordinate system, in this coordinate system, set the region of described three-dimensional button figure
For the sphere of action of mouse event, set described three-dimensional display screen as waveform indication range；
Specifically, with the lower left corner of instrument front rectangle as initial point, plane coordinate system is set up, in this coordinate system
Inside be defined as each three-dimensional button, three-dimensional display screen one rectangle of definition goes as sphere of action for responding Mus
Mark event；With this rectangular extent of click for setting the triggering command of event, three-dimensional display screen can be at it
Display waveform figure in region；
By setting up the corresponding relation between described three-dimensional button and the operational order of input, with three-dimensional button generation
Alternative selects key and data input frame etc. so that the instruction of appearance simulation, data input are all passed through with actual key
Three-dimensional button for prototype inputs, meanwhile, by the output data of appearance simulation mathematical model in three-dimensional
Show in coordinate range determined by display screen boundary rectangle, by the way, it is achieved that to instrument
The visual presentation of operation height, solves the defect that the visualizations such as traditional selection key, input frame are low.
Further, it is considered to traveling wave method receives the impact of cable attenuation in cable fault position fixing process, it is also possible to set
Put the pulse signal of different width to carry out inspection of fault, improve the accuracy of inspection of fault, specifically,
Setting three-dimensional regulation knob on described three-dimensional case, response user is inputted by described three-dimensional regulation knob
Transfer the files instruction, from the described parameter prestored, select the width parameter of correspondence, generate incident pulse signal；
As an embodiment, strobe pulse width parameter is as follows with the relation of tested cable length:
When tested cable is 1000 ~ 9999 meters, the width parameter of 0.2 microsecond pulse can be selected；
When tested cable is 10000 ~ 19999 meters, the width parameter of 2 microsecond pulses can be selected；
When tested cable is more than 20000 meters, the width parameter of 4 microsecond pulses can be selected.
For step S300, the response user instruction by described three-dimensional key-press input, according to the pulsewidth prestored
Parameter generates incident pulse signal；
Specifically, mainly during carrying out l-G simulation test, instrument threedimensional model is utilized to be controlled referring to
Make, data input and output data show (including various measured value, waveform etc.), thus realize l-G simulation test
High visibility；
As an embodiment, first cable threedimensional model and instrument threedimensional model are imported to based on virtual existing
In real virtual technology scene；Wherein, this virtual scene is with the scene at cable place as prototype, uses 3DMAX
Business software carries out the three-dimensional scene models emulated.Then in this three-dimensional scene models, use instrument three-dimensional mould
Type carries out cable's fault locating；When needs display waveform figure, by incident pulse and the waveform of reflected impulse
Figure shows in following the indication range of three-dimensional display screen, and the waveform of incident pulse is through waveform attenuating system
After number, it is thus achieved that reflected pulse waveform.
By the way, with respect to the form of selection key, effect of visualization true to nature is had more；
Relative to fixing waveform display mode, have more effect of visualization true to nature.
For in step S500, calculate the process of the position of Method of Cable Trouble Point according to described time difference, according to
Parameters amount, utilizes equation below to carry out calculating fault distance, determines abort situation:
In formula, L is the distance of trouble point, and Δ t is time difference, and v is pulse transmission speed in the cable.
For in step S500, trouble point correspondence position on cable threedimensional model is shown；Specifically,
Owing to cable threedimensional model is scaled, so according to the position of actual fault point, then at cable three
Calculate relevant position on dimension module, be then highlighted on this position, such that it is able to realize fault
The real-time visual effect of point.
The virtual reality skill that technical scheme is characterized with feeling of immersion and the good interactivity of height
Art, obtains manual simulation environment true to nature, effectively simulation people's row of various sensory perceptual systems in experimental situation
For, it is achieved the cable's fault locating emulation of high visibility, improve the work efficiency of failture evacuation, this
Bright technology is used widely in network system, and has been achieved for goodish effect,
Emulation safety education training, operating condition and the malfunction of cable are monitored aspect, can bring fabulous
Effect, has positive meaning.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is as the criterion.
Claims (1)
1. an impulse method cable's fault locating emulation mode, it is characterised in that comprise the following steps:
S100, utilizes virtual reality technology to set up cable threedimensional model, and according to the characterisitic parameter of tested cable
Set up the mode that pulse signal transmits in the cable；
Wherein, set up cable threedimensional model to specifically include:
With tested cable as prototype, according to ratio and the color of each parts, 3DMAX software is utilized to fictionalize
Cable threedimensional model, wherein, described cable threedimensional model is made up of three-phase, including both sides three-phase electricity cable end,
Terminals, oversheath, armor, earth lead, bracket component；
Set up mode to specifically include:
Pulse signals transient state travelling wave process in the cable is analyzed, obtain by resistance, conductance, inductance and
The equivalent circuit of electric capacity composition；
Obtain, according to described equivalent circuit, the computing formula of velocity of wave that pulse signal transmits in the cable and waveform declines
Subtract coefficient；
S200, utilizes virtual reality technology to fictionalize the three-dimensional case of cable's fault locating instrument, and this three
Three-dimensional button and three-dimensional display screen is set on dimension shell；Described three-dimensional case sets three-dimensional regulation knob,
The instruction of transferring the files that response user is inputted by described three-dimensional regulation knob, selects correspondence from the parameter prestored
Width parameter；
S300, response user, by the instruction of described three-dimensional key-press input, generates according to the width parameter selected
Incident pulse signal；Specifically include:
With the external structure of cable's fault locating instrument as prototype, 3DMAX software is utilized to fictionalize instrument
Three-dimensional case；
Described three-dimensional case fictionalizes three-dimensional button, three-dimensional display screen figure；
Set up a plane coordinate system, in this coordinate system, set the region of described three-dimensional button figure as mouse
The sphere of action of event, sets described three-dimensional display screen as waveform indication range；
S400, calculates between described incident pulse signal and corresponding reflected impulse according to described mode
Time difference, and the waveform of described incident pulse and reflected impulse is shown on described three-dimensional display screen；
S500, calculates the position of Method of Cable Trouble Point, by described trouble point at cable three according to described time difference
On dimension module, correspondence position shows；
The described position step according to described time difference calculating Method of Cable Trouble Point includes:
In formula, L is the distance of trouble point, and Δ t is time difference, and v is pulse transmission speed in the cable；
Position according to described trouble point carries out failture evacuation to cable.
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| CN103337119B (en) * | 2013-06-08 | 2015-11-18 | 山东康威通信技术股份有限公司 | A kind of method of armored electric cable theft prevention monitoring and location |
| WO2015071232A2 (en) * | 2013-11-13 | 2015-05-21 | Koninklijke Philips N.V. | Problem detection in cable system |
| CN103954886A (en) * | 2014-04-24 | 2014-07-30 | 华南理工大学 | Cable fault positioning simulation method using time domain reflectometry |
| CN109975660B (en) * | 2019-04-11 | 2021-06-15 | 西安福润德电子科技有限公司 | Method for synthesizing full-range panoramic test pulse by multiple ranges |
| CN110930538A (en) * | 2019-12-18 | 2020-03-27 | 三一重机有限公司 | Method and system for visualizing fault information of vehicle |
| CN112185222B (en) * | 2020-10-19 | 2022-06-10 | 西安三芯易达电子科技有限公司 | Cable fault correlator and terminal |
| CN115856525B (en) * | 2022-11-08 | 2024-03-19 | 武汉朗德电气有限公司 | Cable partial discharge on-line monitoring method and system |
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| US6972574B2 (en) * | 2001-01-31 | 2005-12-06 | Cm Technologies Corporation | Method and apparatus for monitoring integrity of wires or electrical cables |
| CN101907437B (en) * | 2010-07-23 | 2012-05-23 | 西安科技大学 | Wavelet difference algorithm-based cable fault localization method |
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Effective date of registration: 20200917 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |