CN110412410A - Cable fault coarse ranging methods based on secondary pulse process - Google Patents
Cable fault coarse ranging methods based on secondary pulse process Download PDFInfo
- Publication number
- CN110412410A CN110412410A CN201810397094.9A CN201810397094A CN110412410A CN 110412410 A CN110412410 A CN 110412410A CN 201810397094 A CN201810397094 A CN 201810397094A CN 110412410 A CN110412410 A CN 110412410A
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- China
- Prior art keywords
- fault
- secondary pulse
- power cable
- pulse process
- data collecting
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- 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.)
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Classifications
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- 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
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
Abstract
The invention discloses the cable fault coarse ranging methods based on secondary pulse process, including carrying out building power cable fault location system based on LABVIEW virtual instrument development platform, the system mainly includes signal source equipment, sensor, data collecting card and computer, secondary pulse process is used first, carrying out fault test to failure power cable is by the way that signal source equipment is added on power cable, sensor transmits signals to data collecting card, and signal is transmitted further to computer and is handled, stored and shown by data collecting card；Pass through second pulse analytic approach, determine that signal pulse start time point carries out fault distance calculating, then it carries out as the result is shown, the action of low-voltage pulse reflection configuration that front and back receives twice is overlapped by secondary pulse process, two waveforms will have an apparent divergence point, this divergence point is exactly the back wave form point of fault point；Its main feature is that easy to operate, multi-functional, echo pattern is explained simple.
Description
Technical field
The present invention relates to cable fault localization method in a kind of electric system, and in particular to a kind of based on secondary pulse process
Cable fault coarse ranging methods.
Background technique
These increasing cable faults must be just repaired with the shortest time in order to improve power supply reliability, however electric power
Cable is the special transmission line of electricity for being embedded in underground, is not easy to directly observe discovery fault point.If event cannot be found out in time
The position for hindering point, cannot just repair, and cause to have a power failure for a long time, stop production, bring huge economic loss, while also living to people
It makes troubles.Thus how judgement power cable fault point position rapidly and accurately is timely reparation power cable, improves power supply
The premise of reliability.And how to select fault distance-finding method is the project for needing to be continued deeper into research.
Summary of the invention
The present invention provides the cable fault coarse ranging methods based on secondary pulse process, detect singular points, look for
Be out of order distance.
The present invention is achieved through the following technical solutions:
Cable fault coarse ranging methods based on secondary pulse process, including based on LABVIEW virtual instrument development platform into
Row building power cable fault location system, the system mainly includes signal source equipment, sensor, data collecting card and calculating
Machine uses secondary pulse process first, and carrying out fault test to failure power cable is by the way that signal source equipment is added to electric power electricity
On cable, sensor transmits signals to data collecting card, and signal is transmitted further to computer and is handled, stores by data collecting card
And display；By second pulse analytic approach, determines that signal pulse start time point carries out fault distance calculating, then carry out result
Display.Patterned language construction is used by using LABVIEW, there is high development efficiency and powerful measurement, analysis
And display function, it is original hard that the fault localization system based on virtual instrument platform design does not need replacement when carrying out Function Extension
Component and module in part resource, so as to the fund of saving；Currently, virtual instrument technology oneself had a series of specifications and mark
Standard, the virtual instrument module that user only needs to select to meet unified standard when choosing is that is, odd according to pulse starting point and signal
The action of low-voltage pulse reflection configuration that front and back receives twice is overlapped, two waveforms by the relationship of dissimilarity by secondary pulse process
An apparent divergence point will be had, this divergence point is exactly the back wave form point of fault point；Its main feature is that easy to operate, more function
Can, echo pattern is explained simple.
Further, signal can also be carried out fault distance calculating by cursor positioning, then be carried out by manual ranging
As the result is shown.
Further, capture card selects the sample frequency of high speed.Data collecting card and computer are the hardware bases of this system
Plinth, wherein the performance of data collecting card directly influences the main indicators such as the precision of fault test system, sampling rate, in order to suitable
The cracking characteristic of traveling wave spread speed is answered, the capture card in this system selects the sample frequency of high speed, so that system performance is more preferably.
The present invention has the advantage that and the utility model has the advantages that
1, the present invention uses patterned language construction by using LABVIEW, with high development efficiency and powerful
Measurement, analysis and display function, based on virtual instrument platform design fault localization system be not required to when carrying out Function Extension
The component and module in original hardware resource are replaced, so as to the fund of saving；Currently, virtual instrument technology oneself had a system
Column codes and standards, the virtual instrument module that user only needs to select to meet unified standard when choosing according to pulse that is, originate
The relationship of point and Singular Point, is folded the action of low-voltage pulse reflection configuration that front and back receives twice by secondary pulse process
Add, two waveforms will have an apparent divergence point, this divergence point is exactly the back wave form point of fault point；Its main feature is that easily
It operates, is multi-functional, echo pattern is explained simple；
2, data collecting card and computer of the present invention are the hardware foundations of this system, and wherein the performance of data collecting card is direct
The main indicators such as precision, the sampling rate of fault test system are influenced, in order to adapt to the cracking characteristic of traveling wave spread speed, this
Capture card in system selects the sample frequency of high speed, so that system performance is more preferably；
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment, the present invention is made
Further to be described in detail, exemplary embodiment of the invention and its explanation for explaining only the invention, are not intended as to this
The restriction of invention.
Embodiment 1
Cable fault coarse ranging methods based on secondary pulse process, including based on LABVIEW virtual instrument development platform into
Row building power cable fault location system, the system mainly includes signal source equipment, sensor, data collecting card and calculating
Machine uses secondary pulse process first, and carrying out fault test to failure power cable is by the way that signal source equipment is added to electric power electricity
On cable, sensor transmits signals to data collecting card, and signal is transmitted further to computer and is handled, stores by data collecting card
And display；By second pulse analytic approach, determines that signal pulse start time point carries out fault distance calculating, then carry out result
Display；Signal can also be carried out fault distance calculating by cursor positioning, then be carried out as the result is shown by manual ranging；It adopts
The sample frequency of truck selection high speed.When implementation, second pulse analytic approach is a kind of newer distance measuring method, and principle is to event
Hinder cable and discharge an action of low-voltage pulse, is not more than 20~160V, as long as the ground resistance of fault point is greater than 5 times of cable wave impedance,
It is considered that failure cable is to open a way relative to action of low-voltage pulse at this time, then suitable in the reflection configuration that pulse release termination receives
In the waveform of a good cable of core insulation；One is discharged to failure cable to be enough to make core insulation fault point that flashover occur
High-voltage pulse, while second action of low-voltage pulse of release is triggered, when the electric arc in fault point does not extinguish, fault point is relative to low-tension pulse
Punching is dead short, then being equivalent to a core dead short over the ground in the received action of low-voltage pulse reflection configuration in pulse release end
Waveform；The action of low-voltage pulse reflection configuration that front and back receives twice is overlapped, two waveforms will have an apparent hair
Scatterplot, this divergence point are exactly the back wave form point of fault point；Its main feature is that easy to operate, multi-functional, echo pattern is explained simple.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (3)
1. the cable fault coarse ranging methods based on secondary pulse process, which is characterized in that including being opened based on LABVIEW virtual instrument
Hair platform carries out building power cable fault location system, and the system mainly includes signal source equipment, sensor, data acquisition
Card and computer use secondary pulse process first, and carrying out fault test to failure power cable is by the way that signal source equipment is added
Onto power cable, sensor transmits signals to data collecting card, and signal is transmitted further to computer and carried out by data collecting card
Processing, storage and display；By second pulse analytic approach, determine that signal pulse start time point carries out fault distance calculating, so
After carry out as the result is shown.
2. the cable fault coarse ranging methods according to claim 1 based on secondary pulse process, which is characterized in that the letter
Number by that can also carry out fault distance calculating by cursor positioning, then carry out as the result is shown by manual ranging.
3. the cable fault coarse ranging methods according to claim 1 based on secondary pulse process, which is characterized in that described to adopt
The sample frequency of truck selection high speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397094.9A CN110412410A (en) | 2018-04-28 | 2018-04-28 | Cable fault coarse ranging methods based on secondary pulse process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397094.9A CN110412410A (en) | 2018-04-28 | 2018-04-28 | Cable fault coarse ranging methods based on secondary pulse process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110412410A true CN110412410A (en) | 2019-11-05 |
Family
ID=68346847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810397094.9A Withdrawn CN110412410A (en) | 2018-04-28 | 2018-04-28 | Cable fault coarse ranging methods based on secondary pulse process |
Country Status (1)
| Country | Link |
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| CN (1) | CN110412410A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157852A (en) * | 2020-02-17 | 2020-05-15 | 广东电网有限责任公司 | Power cable fault positioning system and method based on wavelet and pulse attenuation |
| CN112185222A (en) * | 2020-10-19 | 2021-01-05 | 西安三芯易达电子科技有限公司 | Cable fault correlator and terminal |
-
2018
- 2018-04-28 CN CN201810397094.9A patent/CN110412410A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157852A (en) * | 2020-02-17 | 2020-05-15 | 广东电网有限责任公司 | Power cable fault positioning system and method based on wavelet and pulse attenuation |
| CN112185222A (en) * | 2020-10-19 | 2021-01-05 | 西安三芯易达电子科技有限公司 | Cable fault correlator and terminal |
| 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 |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191105 |