CN108020751A - A kind of Cable fault examination method and Cable fault examination system - Google Patents
A kind of Cable fault examination method and Cable fault examination system Download PDFInfo
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- CN108020751A CN108020751A CN201711080684.0A CN201711080684A CN108020751A CN 108020751 A CN108020751 A CN 108020751A CN 201711080684 A CN201711080684 A CN 201711080684A CN 108020751 A CN108020751 A CN 108020751A
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- G—PHYSICS
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- 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
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Abstract
A kind of Cable fault examination method and Cable fault examination system, are related to field of cable technology.Method includes the space trend for determining cable；Electrical distance between fault inspecting and test point；And moved towards to determine the actual geographic position of trouble point, more convenient, efficient, accurate progress buried cable fault location and reparation according to space.Wherein, moved towards along space, trouble point is equal to electrical distance with the distance between test point.System includes control mechanism, detent mechanism and testing agency.Detent mechanism and testing agency communicate with control mechanism to be connected.Testing agency is used for the electrical distance of fault inspecting and test point and feeds back to control mechanism.Control mechanism is used to determine trouble point and position is fed back to detent mechanism.The two accuracy is high, easy to operate, is adapted to the fault detect of various cables (particularly buried cable), of low cost, is adapted to promote the use of, can accurately reflect aging and the fault condition of cable.
Description
Technical field
The present invention relates to field of cable technology, is examined in particular to a kind of Cable fault examination method and cable fault
Examining system.
Background technology
Since cable is producing and inevitably resulting from many mass defects in manufacturing process, such as：Micropore, impurity
Deng.And can also be subject to some mechanical damages in transport, laying, such as：Crack, outer jacket breakage etc..Be laid in the cable of underground
For a long time under the multiple physical fields such as AC sinusoidal voltage, surge voltage, moisture and temperature synergistic effect, cable system progressively aging,
It is final to trigger electric power accident.It is therefore expected that cable will degradation in 10 years or so its insulation performances of operation.
Shown according to the statistics of State Grid Corporation of China：XLPE insulated cable of the service operation time limit more than 10 years accounts for always
The ratio of cabling is close to reach 40%, and runs cable of the time limit more than 20 years and account for the 1.8% of total length.China now
The underground insulated power cable of laying has stepped into " midlife " even " senescence phase " of cable life expectancy.
With the process of Chinese Urbanization, it is more and more aerial for the requirement of the Urban Landscape appearance of the city and security consideration
Transmission line of electricity has all been transferred to underground.
Currently, cable (particularly buried cable) power outage caused by failure and other electric power accidents are commonplace, such as
Fruit is unable to timely processing, then very likely results in the heavy losses of society and all circles of enterprise.But blindly replace in advance on a large scale
The way cost too expensive of electric power cable, is more and more queried.And accurately directly find the old of buried cable
Change point, take measures to tackle in advance, it is most important to ensure that circuit normal operating conditions is only with relatively low financial cost.Therefore,
Research is adapted to the method for cable (particularly buried cable) insulation ag(e)ing detection to be to reduce unplanned power outage and other electricity
Effective and urgent need means of power accident.
The content of the invention
The present invention first purpose be to provide a kind of Cable fault examination method, it can be able to conveniently find cable
Trouble point, accuracy is high, easy to operate, is adapted to the fault detect of various cables (particularly buried cable)；It can be accurately anti-
Aging and the fault condition of cable are reflected, easy to take measures to be tackled in advance and handled, reduces the generation of electric power accident, is ensured
The safety and stabilization of electric system；Its is of low cost, is adapted to promote the use of, easy to be carried out maintenance management to cable, and to improve
The system of laying of cable plays certain directive function.
Second object of the present invention is to provide a kind of Cable fault examination system, it can be able to conveniently find cable
Trouble point, accuracy is high, easy to operate, is adapted to the fault detect of various cables (particularly buried cable), and detection efficiency is high, fits
For the Quick overhaul to electric system；It can accurately reflect the aging of cable and fault condition, easy to take measures in advance
Tackled and handled, reduce the generation of electric power accident, ensure the safety and stabilization of electric system；Its is of low cost, is adapted to push away
It is wide to use, easy to be carried out maintenance management to cable, and certain directive function is played to improve the system of laying of cable.
What the embodiment of the present invention was realized in：
A kind of Cable fault examination method, it includes：Determine the space trend of cable；Between fault inspecting and test point
Electrical distance；And moved towards to determine trouble point according to space.Wherein, moved towards along space, trouble point between test point away from
From equal to electrical distance.
Further, it is determined that the space trend of cable includes：Determine the spatial model of cable and the model ratio of spatial model
Example.
Moved towards to determine that trouble point includes according to space：Determine test point model inspection point corresponding in spatial model.
Model trouble point is determined according to spatial model, along the trend of spatial model, model trouble point is the same as the distance between model inspection point
Product equal to electrical distance with model scale.Determine model trouble point relative model test point orientation and Model A terrestrial away from
From.Ratio of the ground distance of trouble point relative sensing point for Model A terrestrial distance with model scale.
Further, it is determined that the space trend of cable includes：Determine spatial model, the model ratio of spatial model of cable
Latitude and longitude information corresponding to example and spatial model.
Moved towards to determine that trouble point includes according to space：Determine test point model inspection point corresponding in spatial model.
Model trouble point is determined according to spatial model, along the trend of spatial model, model trouble point is the same as the distance between model inspection point
Product equal to electrical distance with model scale.Determine the longitude and latitude corresponding to model trouble point, trouble point is determined by longitude and latitude.
Further, moved towards to determine that trouble point is further included according to space：Failure is found out using positioner combination longitude and latitude
Point.
Further, positioner is GPS positioning device or the Big Dipper positioner.
Further, it is determined that the space trend of cable further includes：Determine the depth information corresponding to spatial model.According to sky
Between move towards determine trouble point further include：Determine the depth corresponding to model trouble point, trouble point is determined by longitude and latitude and depth.
Further, the low resistance faults for cable and short-term failure, electrical distance is determined using low voltage pulse reflection method.
Further, for the high resistive fault of cable, using high-voltage pulse current method, high-voltage pulse electric platen press or secondary arteries and veins
Rush at least one of method and determine electrical distance.
A kind of Cable fault examination system, it includes：Control mechanism, detent mechanism and testing agency.Detent mechanism and inspection
Survey mechanism and communicate connection with control mechanism.Testing agency is used for electrical distance between fault inspecting and test point and by electricity
Gas distance feeds back to control mechanism.Control mechanism is used to be moved towards to determine trouble point and by the position of trouble point according to the space of cable
Information feeds back to detent mechanism.Detent mechanism is used for the actual geographic position that trouble point is determined according to positional information.Wherein, along sky
Between move towards, trouble point is equal to electrical distance with the distance between test point.
The beneficial effect of the embodiment of the present invention is：
Present inventor, which studies, to be found：At present, underground cable systems fault location is broadly divided into pre-determined bit and (surveys
Away from) and be accurately positioned (pinpoint) two steps.
Pre-determined bit mainly uses impedance method or traveling wave method, obtains trouble point to the electrical distance of test point, event is obtained with this
Hinder the general orientation of point.Impedance method includes bridge method and distributed constant and calculates high resistive fault method, and traveling wave rule include standing wave method,
Low voltage pulse reflection method, high-voltage pulse electric platen press and secondary pulse process.Be accurately positioned mainly using sound detection, sound magnetic-synchro method,
The methods of frequency induction method, by sending signal to buried cable, then the mode of detection desired signal is positioned on the ground.
By taking sound detection as an example, when cable fault is sought in survey, faulty cable is plus a sufficiently high impact of amplitude
In the case of voltage, trouble point can produce flashover electric discharge, also have huge discharging sound and produce, and this sound can be communicated to
Earth surface, is sought to trouble point by this phenomenon to survey.Position indicator used in the method is changed using highly sensitive acoustic-electric
Device, is first transformed into electric signal by the faint seismic wave in ground, then using transistor amplifier by received electric signal into
The certain amplification of row, recycles earphone to be reduced into sound.But due to the interference of ambient noise, discrimination is added when actually survey is sought
Difficulty.
, whether synchronously can be to letter using the reception of electromagnetic wave and sound wave when fault discharge by taking sound magnetic-synchro method as an example
Number confidence level is judged.If electric discharge electromagnetic wave in trouble point can be detected, and it can hear seismic wave, then the sound wave that discharges is just in work
Make.If seismic signal and electromagnetic wave are synchronous, the seismic wave for proving to be heard is reliable, you can with according to corresponding signal
To determine the specific location of trouble point.But the pinpoint method of the above is easy to be disturbed by external environment, especially exists
In city, sound is very big with electromagnetic noise, interference is easily produced to measurement work, it is difficult to measure the tiny signal that underground is sent.
In addition, powerful signal supervisory instrument price is more expensive, operation is more complicated, is unfavorable for large area and pushes away
Extensively, lacking experience for missing person's operating instrument and is once surveyed, measured method is improper, causes trouble point erroneous judgement either for a long time
Trouble point is can not find, the economic loss and social cost caused by the time delay of breakdown maintenance will be difficult to estimate.
Particularly examined in today with Urbanization, the failure that cable (particularly buried cable) is carried out in city
Survey inconvenient.And for fear of civic normal life, the progress for detecting work is often dragged very slow, to safeguarding power train
The safety and stability of system causes sizable obstruction, and the time cost of required input is also very high.And carried out in city
The pre-determined bit of Method of Cable Trouble Point and exact localization operation difficulty point are up to, and for fear of city in itself there are substantial amounts of electromagnetic noise and
Shake noise so that existing detection technique is difficult to carry out.But once city occurrence of large-area electric power accident, caused by damage
It is again imponderable to lose, this series of contradiction make it that the development of current cable detection, service work is very deeply worried.
Cable fault examination method provided in an embodiment of the present invention can preferably solve the above problems, and this method is with cable
Space trend be " bridge ", the distance for walking always to find out same test point by the space according to cable is equal to the former of electrical distance
Barrier point.When carrying out localization of fault using this method, it need to only detect that trouble point is (i.e. predetermined with the electrical distance between test point
Position), without carrying out exact localization operation of the prior art, the pinpoint concrete operations in this method are：According to cable
Space trend, determine that the distance with test point is equal to the target point of electrical distance, and this target point is exactly trouble point.With showing
There is technology to compare, this method need not carry out exact localization operation of the prior art, save corresponding equipment cost.At the same time originally
Method is to be moved towards with the space of cable as " bridge ", will not be subject to disturbing for the vibrations noise in city and electromagnetic noise, compare
In the prior art, this method has the accuracy of higher.In addition, when this method is accurately positioned, place, citizen will not be subject to
The interference of normal life, substantially increases operability.Cable fault examination method can be greatly improved to Cable fault examination
Efficiency, easy to quickly determine electric system trouble point, in order to timely processing, prevent electric power accident.At the same time also just
In " health status " of quickly grasping whole electric system, easy to provide reference and guidance for follow-up management.Cable fault examination
Method is realized in a manner of more convenient, cheap fast and accurately to be detected and manages to electric system, for the electric power in city
It is of great significance for system maintenance work.
In general, Cable fault examination method provided in an embodiment of the present invention can be able to conveniently find the failure of cable
Point, accuracy is high, easy to operate, is adapted to the fault detect of various cables (particularly buried cable).Its anti-interference is good, can
Aging and the fault condition of cable are accurately reflected, easy to take measures to be tackled in advance and handled, reduces the hair of electric power accident
It is raw, ensure the safety and stabilization of electric system, be particularly suitable for using in city.Its is of low cost at the same time, is adapted to promote the use of,
Easy to be carried out maintenance management to cable, and certain directive function is played to improve the paving mode of cable.
Cable fault examination system provided in an embodiment of the present invention using testing agency come fault inspecting and test point it
Between electrical distance and electrical distance is fed back into control mechanism；Found out using control mechanism according to the space of cable trend with inspection
The distance of measuring point is equal to the trouble point of electrical distance and the positional information of trouble point is fed back to detent mechanism；And detent mechanism is then
For determining the actual geographic position of trouble point according to positional information, in order to which service personnel is accurately constructed.
Cable fault examination system can realize the clarification in certain roles of power system monitoring work, and testing staff utilizes detection machine
Structure determines the electrical distance between trouble point and test point, and after control mechanism processing feedback, service personnel then utilizes localization machine
Structure carries out service work to find the specific location of trouble point.The harmony between detection and maintenance is so substantially increased, is made
Must detect and overhaul to carry out at the same time, substantially increase the work efficiency of electric system maintenance, can be more promptly to electricity
Cable failure is tackled and handled.
Cable fault examination system is when carrying out trouble point confirmation, vibrations noise and the electromagnetic noise that will not be subject in city
Interference, identified trouble point have higher accuracy, easy to maintenance work it is accurate, be smoothed out.In addition, cable event
Hinder detecting system without using accurate positioning device of the prior art and equipment, save implementation cost.
In general, Cable fault examination system provided in an embodiment of the present invention can be able to conveniently find the failure of cable
Point, accuracy is high, easy to operate, is adapted to the fault detect of various cables (particularly buried cable).Its anti-interference is good, can
Aging and the fault condition of cable are accurately reflected, easy to take measures to be tackled in advance and handled, reduces the hair of electric power accident
It is raw, ensure the safety and stabilization of electric system, be particularly suitable for using in city.Its detection and maintenance work can be at the same time at the same time
Carry out, there is the work efficiency of higher, and it is of low cost, it is adapted to promote the use of, easy to be carried out maintenance management to cable, and is
The paving mode for improving cable plays certain directive function.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the schematic diagram of the spatial model in Cable fault examination method provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.The present invention implementation being usually described and illustrated herein in the accompanying drawings
The component of example can be arranged and designed with a variety of configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this area is common
Technical staff's all other embodiments obtained without creative efforts, belong to the model that the present invention protects
Enclose.
Cable fault examination method provided in an embodiment of the present invention and Cable fault examination system are carried out below specific
Introduce.
The present embodiment provides a kind of Cable fault examination method, it includes：Determine the space trend of cable；Fault inspecting
Electrical distance between test point；And moved towards to determine trouble point according to space.Wherein, moved towards along space, trouble point is the same as inspection
The distance between measuring point is equal to electrical distance, i.e., using test point as starting point, is arrived after walking an electrical distance length along cable
Up to terminal, and the trouble point that this emphasis, which is exactly for we, to be looked for.
Cable fault examination method can preferably solve problems of the prior art, Cable fault examination method with
The space trend of cable is " bridge ", and the distance for walking always to find out same test point by the space according to cable is equal to electrical distance
Trouble point.When carrying out localization of fault using Cable fault examination method, only trouble point need to be detected between test point
Electrical distance (is pre-positioned), without carrying out exact localization operation of the prior art.It is pinpoint specific in this method
Operation is：Moved towards according to the space of cable, determine that the distance with test point is equal to the target point of electrical distance, and this target point
It is exactly trouble point.Compared with prior art, this method need not carry out exact localization operation of the prior art, save corresponding
Equipment cost.This method is to be moved towards with the space of cable as " bridge " at the same time, vibrations noise and the electromagnetism that will not be subject in city
The interference of noise, compared with the prior art, this method have the accuracy of higher.In addition, when this method is accurately positioned, no
It can be disturbed be subject to place, citizen's normal life, substantially increase operability.Cable fault examination method can greatly improve
To the efficiency of Cable fault examination, easy to quickly determine the trouble point of electric system, in order to timely processing, prevent electric power
Accident.Also allow for quickly grasping " health status " of whole electric system at the same time, easy to provide reference and guidance for follow-up management.
Cable fault examination method is realized in a manner of more convenient, cheap fast and accurately to be detected and manages to electric system, right
It is of great significance for the electric system maintenance work in city.
Further, it is determined that the space trend of cable includes：Determine the spatial model of cable and the model ratio of spatial model
Example.Moved towards to determine that trouble point includes according to space：Determine test point model inspection point corresponding in spatial model.According to sky
Between model determine model trouble point, along the trend of spatial model, model trouble point is equal to electricity with the distance between model inspection point
Product of the gas distance with model scale.Determine the orientation and Model A terrestrial distance of model trouble point relative model test point.Therefore
Ratio of the ground distance of barrier point relative sensing point for Model A terrestrial distance with model scale.
It should be noted that the spatial model of cable can be two dimensional model or threedimensional model according to actual conditions, also may be used
The cable distribution information that drawing information during being with reference to laying obtains.Such as：Can be in the cable laid processes of cable at the same time
Collect, can also the detection instrument such as later use path instrument supplement to obtain.
Cable fault examination method has been put into cable after detection obtains electrical distance, being accurately positioned for trouble point
Carried out on spatial model, the position of faults point is come with the cable distance (or length) on the spatial model of cable, passes through mould
Type ratio converts, and then obtains the physical location of trouble point, consequently facilitating maintenance personnel is accurately safeguarded.Compared to biography
For system method, Cable fault examination method is carrying out when being accurately positioned of trouble point, is using the spatial model of cable as medium
It is determined, the noise that this process will not be subject to come from the external world in itself disturbs, so as to ensure to have higher standard
True property, contributes to maintenance personnel accurately to be constructed, and avoids the blindness constructed and overhauled.
Further, it is determined that cable space trend can also be including：Determine the spatial model of cable, spatial model
Latitude and longitude information corresponding to model scale and spatial model.Correspondingly, moved towards to determine that trouble point can also be according to space
Including：Determine test point model inspection point corresponding in spatial model.Model trouble point is determined according to spatial model, along sky
Between model trend, model trouble point with the distance between model inspection point be equal to electrical distance with model scale product.Really
Longitude and latitude corresponding to cover half type trouble point, trouble point is directly and accurately determined by longitude and latitude.
It should be noted that the latitude and longitude information corresponding to spatial model refers to the actual longitude and latitude position of cable.
By more than design, by while spatial model is established by the longitude and latitude distribution situation isospace model of cable
Be mapped, after determining model trouble point from spatial model, using the latitude and longitude information corresponding to model trouble point come
The physical location of Method of Cable Trouble Point is found, in order to which maintenance personnel accurately constructs, makes trouble-shooting point more directly, conveniently.
Further, moved towards to determine that trouble point is further included according to space：Failure is found out using positioner combination longitude and latitude
Point.Positioner can be GPS positioning device or the Big Dipper positioner etc..But also can be positioner matching navigation dress
Put, using the automatic pathfinding of guider and guide service personnel to go to trouble point, which greatly enhances the accurate of trouble-shooting point
Property and convenience.
Further, it is contemplated that buried cable has certain depth and laying depth, determines the space trend of cable also
Including：Determine the depth information corresponding to spatial model.Correspondingly, moved towards to determine that trouble point is further included according to space：Determine mould
Depth corresponding to type trouble point, trouble point is determined by longitude and latitude and depth.
By the way that the actual grade isospace Model Matching of buried cable got up at the same time so that definite model trouble point it
Can obtain the depth information corresponding to model trouble point at the same time afterwards so that maintenance personnel can reach the position of fault it
After excavate corresponding depth, accurately ground-to-ground to play cable to be safeguarded, further improve the accuracy of construction.Meanwhile the party
The different depth that formula can also be avoided the occurrence of in same longitude and latitude position has to be led to not determine trouble point position with cable more
In any root cable the problem of, it is ensured that the accuracy of construction, and greatly reduce the required of maintenance personnel's trouble-shooting point
Time.It is particularly suitable for the maintenance of buried cable.
Further, the low resistance faults for cable and short-term failure, can determine to detect using low voltage pulse reflection method
Electrical distance between point and trouble point.For the high resistive fault of cable, high-voltage pulse current method, high-voltage pulse electric can be used
At least one of platen press or secondary pulse process determine the electrical distance between test point and trouble point.
Specifically, for low voltage pulse reflection method, usually injecting an action of low-voltage pulse to failure cable makes it in cable
Middle propagation, the time difference △ t between record transmitting pulse and trouble point reflected impulse, it is known that the wave velocity of pulse in the cable is
V, then the electrical distance of test point to trouble point be equal to v △ t/2.
For high-voltage pulse electric platen press, Method of Cable Trouble Point is usually punctured by high direct voltage or high voltage pulse signal, is utilized
The time of discharge voltage pulse round trip between test point and trouble point measures electrical distance.
For high-voltage pulse current method, the current traveling wave signal in linear current coupler collection cable is usually used,
Method of Cable Trouble Point high-voltage electricity is punctured, is gathered using instrument and records current traveling wave signal caused by breakdown fault point, is led to
Cross analysis and judge current traveling wave signal in the time needed for test point and trouble point round trip to calculate electrical distance.
For secondary pulse process, generally by high pressure generator to there occurs the application of the power cable system of high resistive fault
High-voltage pulse, makes trouble point arc discharge occur and is in low-resistance characteristic.Injected at this time by coupling device into cable one it is low
Pressure pulse signal, records action of low-voltage pulse reflection configuration (being known as band arc waveform) at this time.After arc extinction, one is reinjected
Low voltage pulse signal, records action of low-voltage pulse reflection configuration (being known as without arc waveform) at this time.Will be with arc waveform and without electric arc
Waveform is compared, and two waveforms will be significantly different on corresponding position of failure point, and the obvious ramification point of waveform is exactly failure
The back wave form point of point.So as to calculate electrical distance according to back wave form point.
It should be noted that before electrical distance is measured, the nature of trouble of cable is first determined.Determine that nature of trouble is adopted
Conventional method is：Measure core insulation against ground resistance and phase insulation resistance respectively with insulation resistance meter or in cable distal end
By three-phase shortcircuit, alternate conductive resistance is measured in near-end universal meter.So that the property of failure judgement is ground connection, short circuit, broken string,
Or their mixing；It is single-phase, two-phase, or three-phase fault；It is high resistant, low-resistance or flashover failure.
It should be noted that according to practical operation needs, other detection methods can also be selected determine test point with
Electrical distance between trouble point, it is not limited to this.
In conclusion Cable fault examination method can be able to conveniently find the trouble point of cable, accuracy is high, operation letter
It is single, it is adapted to the fault detect of various cables (particularly buried cable).Its anti-interference is good, can accurately reflect the aging of cable
And fault condition, easy to take measures to be tackled in advance and handled, the generation of electric power accident is reduced, ensures the peace of electric system
It is complete and stable, it is particularly suitable for using in city.Its is of low cost at the same time, is adapted to promote the use of, easy to safeguard cable
Management, and play certain directive function to improve the paving mode of cable.
The embodiment of the present invention also provides a kind of Cable fault examination system.Cable fault examination system includes：Control machine
Structure, detent mechanism and testing agency.
Detent mechanism and testing agency communicate with control mechanism to be connected.Testing agency is used for fault inspecting and test point
Between electrical distance and electrical distance is fed back into control mechanism.Control mechanism is used to be moved towards to determine event according to the space of cable
The positional information of trouble point is simultaneously fed back to detent mechanism by barrier point.Detent mechanism is used for the reality that trouble point is determined according to positional information
Border geographical location.Wherein, moved towards along space, trouble point is equal to electrical distance with the distance between test point.
Cable fault examination system is using testing agency come the electrical distance between fault inspecting and test point and by electricity
Gas distance feeds back to control mechanism；The distance for being found out same test point according to the space of cable trend using control mechanism is equal to electrically
The trouble point of distance simultaneously sends the positional information of trouble point to detent mechanism；And detent mechanism is then for true according to positional information
The actual geographic position of trouble point is determined, in order to which service personnel is accurately constructed.
Cable fault examination system can realize the clarification in certain roles of power system monitoring work, and testing staff utilizes detection machine
Structure determines the electrical distance between trouble point and test point, and after control mechanism processing feedback, service personnel then utilizes localization machine
Structure carries out service work to find the specific location of trouble point.The harmony between detection and maintenance is so substantially increased, is made
Must detect and overhaul to carry out at the same time, substantially increase the work efficiency of electric system maintenance, can be more promptly to electricity
Cable failure is tackled and handled.
Cable fault examination system is when carrying out trouble point confirmation, vibrations noise and the electromagnetic noise that will not be subject in city
Interference, identified trouble point have higher accuracy, easy to maintenance work it is accurate, be smoothed out.In addition, cable event
Hinder detecting system without using accurate positioning device of the prior art and equipment, save implementation cost.
It should be noted that testing agency can detect test point and trouble point using low voltage pulse reflection method
Between electrical distance device or high-voltage pulse current method, high-voltage pulse electric platen press or secondary pulse process can be utilized
To detect the device of electrical distance between test point and trouble point.
Further, control mechanism can be used for storing the spatial model of cable, the model scale of spatial model, spatial mode
The depth information corresponding to latitude and longitude information and spatial model corresponding to type, and using by testing agency detect it is electric away from
From the latitude and longitude information and depth information found out along spatial model corresponding to trouble point, then the longitude and latitude corresponding to trouble point
Information and depth information feed back to detent mechanism.Control mechanism can be then POC systems or other can be realized
Detent mechanism can be GPS positioning device or the Big Dipper positioner, and can match a guider.Positioning
Authorities utilize guider automatic seeking to after the latitude and longitude information for the trouble point fed back by control mechanism and depth information
Road simultaneously guides service personnel to go to trouble point, and after reaching trouble point, service personnel can be according to depth information to respective depth
Cable carries out repair and maintenance.Which greatly enhances the accuracy and convenience of trouble-shooting point.
In conclusion Cable fault examination system can be able to conveniently find the trouble point of cable, accuracy is high, operation letter
It is single, it is adapted to the fault detect of various cables (particularly buried cable).Its anti-interference is good, can accurately reflect the aging of cable
And fault condition, easy to take measures to be tackled in advance and handled, the generation of electric power accident is reduced, ensures the peace of electric system
It is complete and stable, it is particularly suitable for using in city.Its detection and maintenance work can be carried out at the same time at the same time, have the work of higher
Efficiency, and it is of low cost, it is adapted to promote the use of, easy to carry out maintenance management cable, and to improve the paving mode of cable
Play certain directive function.
Cable fault examination method is further described below in conjunction with specific embodiment.Need to realize what is illustrated
It is not have specified otherwise such as, the model scale of the spatial model in the embodiment of the present invention is less than 1, is：Model is the same as real
Ratio between thing.
Embodiment 1
The present embodiment provides a kind of Cable fault examination method, comprise the following steps：
(1) nature of trouble of cable is determined；
(2) the electrical distance L between test point and trouble point is measured；
(3) since test point, reach home after elapsing L length forward along cable, this terminal is exactly trouble point.
Cable fault examination method provided in this embodiment is suitable for aerial cable and is layed in the cable on ground, true
After determining electric appliance distance, from the test point of cable, along after cable one electrical distance length of advance, it is possible to reach
Trouble point.
Embodiment 2
The present embodiment provides a kind of Cable fault examination method, comprise the following steps：
(1) determine the spatial model of cable, the model scale of spatial model, the latitude and longitude information corresponding to spatial model and
Depth information corresponding to spatial model, i.e.,：By cable actually corresponding latitude and longitude information and depth information Corresponding matching to sky
Between on model；
(2) nature of trouble of cable is determined；
(3) electrical distance between test point and trouble point is measured；
(4) the model inspection point corresponding to determining test point in spatial model, the trend of cable along spatial model, from
Model inspection point sets out, and is moved forward along the cable in spatial model, and displacement distance is electrical distance and both model scales
Product.Reach home after movement, which is model trouble point；
(5) longitude and latitude and depth of the cable corresponding to model trouble point are determined, position of failure point is determined by the longitude and latitude,
And determine specific cable by the depth.
Cable fault examination method provided in this embodiment is suitable for aerial cable, the cable for being layed in ground and underground
Cable, especially suitable for buried cable, is especially distributed complex buried cable, such as in same longitude and latitude position not
The situation of cable is both provided with depth.This method can be on the premise of without prejudice to people's normal life, quickly and accurately really
Determine trouble point.
It should be noted that depth information can also be mismatched when determining spatial model.At this moment it is more suitable for same
Prolong the situation that depth direction is provided only with a cable in longitude and latitude position.
Embodiment 3
The present embodiment provides a kind of Cable fault examination method, comprise the following steps：
(1) spatial model of cable and the model scale of spatial model are determined；
(2) nature of trouble of cable is determined；
(3) electrical distance between test point and trouble point is measured；
(4) the model inspection point corresponding to determining test point in spatial model, the trend of cable along spatial model, from
Model inspection point sets out, and is moved forward along the cable in spatial model, and displacement distance is electrical distance and both model scales
Product.Reach home after movement, which is model trouble point；
(5) orientation (such as how many degree in east by north etc.) of model trouble point relative model test point is determined, and in space
In model, both model trouble point and model inspection point (are not examined along Model A terrestrial distance determined by the ground in spatial model
Consider depth).
(6) orientation of the relatively actual test point in actual trouble point is the above-mentioned orientation drawn, actual trouble point
Actual ground distance between relatively actual test point is equal to ratio of the above-mentioned Model A terrestrial distance with model scale.
According to the azimuth-range from test point, you can determine the specific location of trouble point.
Cable fault examination method provided in this embodiment is suitable for aerial cable, the cable for being layed in ground and underground
Cable, especially suitable for buried cable.It should be noted that due to not accounting for depth problem, this method is more suitable for same
Prolong the situation that depth direction is provided only with a cable once Position Latitude.
As shown in Figure 1, A points are the model inspection point of cable, its corresponding Model A terrestrial point is a points.Model scale is Y.
Electrical distance between the test point detected and trouble point is L, and test point is determined in spatial model in Fig. 1
After corresponding model inspection point A, using A as starting point, L1 length is moved forward along the cable in spatial model, wherein, L1
=LY.B points are reached after mobile above-mentioned distance, B points are model trouble point, its corresponding Model A terrestrial point is b points.
Orientation and Model A terrestrial distance of the b relative to a are detected in spatial model in Fig. 1 at this time.Wherein, angle P is
20°.So, b is then positioned at the direction of 20 ° of the east by south of a, and the Model A terrestrial distance of a and b is L2.
Therefore deduce that, actual fault point is located at 20 ° of the east by south direction of actually detected point, and actual fault point and reality
Ground air line distance between the test point of border is L2/Y.So far, the specific of the relatively actually detected point of actual fault point is just determined
Position.At this time, trouble point can be directly found using the positional information to be safeguarded.
In general, Cable fault examination method can be able to conveniently find the trouble point of cable, and accuracy is high, operation letter
It is single, it is adapted to the fault detect of various cables (particularly buried cable).Its anti-interference is good, can accurately reflect the aging of cable
And fault condition, easy to take measures to be tackled in advance and handled, the generation of electric power accident is reduced, ensures the peace of electric system
It is complete and stable, it is particularly suitable for using in city.Its is of low cost at the same time, is adapted to promote the use of, easy to safeguard cable
Management, and play certain directive function to improve the paving mode of cable.
Cable fault examination system can be able to conveniently find the trouble point of cable, and accuracy is high, easy to operate, be adapted to various
The fault detect of cable (particularly buried cable).Its anti-interference is good, can accurately reflect aging and the fault condition of cable,
Easy to take measures to be tackled in advance and handled, the generation of electric power accident is reduced, ensures the safety and stabilization of electric system, it is special
It is not adapted to use in city.Its detection and maintenance work can be carried out at the same time at the same time, have the work efficiency of higher, Er Qiecheng
This is cheap, is adapted to promote the use of, and easy to be carried out maintenance management to cable, and plays certain finger to improve the paving mode of cable
Lead effect.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
- A kind of 1. Cable fault examination method, it is characterised in that including：Determine the space trend of the cable；Electrical distance between fault inspecting and test point；AndMoved towards to determine trouble point according to the space；Wherein, moved towards along the space, the trouble point is equal to the electrical distance with the distance between described test point.
- 2. Cable fault examination method according to claim 1, it is characterised in that determine that the space of the cable is walked To including：Determine the spatial model of the cable and the model scale of the spatial model；Moved towards to determine that the trouble point includes according to the space：Corresponding to determining the test point in the spatial model Model inspection point；Model trouble point is determined according to the spatial model, along the trend of the spatial model, the model trouble point It is equal to product of the electrical distance with the model scale with the distance between described model inspection point；Determine the model event The orientation and Model A terrestrial distance of the relatively described model inspection point of barrier point；The ground identity distance of the relatively described test point in the trouble point With the ratio of the model scale with a distance from for the Model A terrestrial.
- 3. Cable fault examination method according to claim 1, it is characterised in that determine that the space of the cable is walked To including：Determine corresponding to the spatial model of the cable, the model scale of the spatial model and the spatial model Latitude and longitude information；Moved towards to determine that the trouble point includes according to the space：Corresponding to determining the test point in the spatial model Model inspection point；Model trouble point is determined according to the spatial model, along the trend of the spatial model, the model trouble point It is equal to product of the electrical distance with the model scale with the distance between described model inspection point；Determine the model event The corresponding longitude and latitude of barrier point, the trouble point is determined by the longitude and latitude.
- 4. Cable fault examination method according to claim 3, it is characterised in that according to determining space trend Trouble point further includes：Using positioner the trouble point is found out with reference to the longitude and latitude.
- 5. Cable fault examination method according to claim 4, it is characterised in that the positioner fills for GPS positioning Put or the Big Dipper positioner.
- 6. Cable fault examination method according to claim 3, it is characterised in that determine that the space of the cable is walked To further including：Determine the depth information corresponding to the spatial model；Moved towards to determine that the trouble point is also wrapped according to the space Include：Determine the depth corresponding to the model trouble point, the trouble point is determined by the longitude and latitude and the depth.
- 7. Cable fault examination method according to claim 1, it is characterised in that for the cable low resistance faults and Short-term failure, the electrical distance is determined using low voltage pulse reflection method.
- 8. Cable fault examination method according to claim 1, it is characterised in that for the high resistive fault of the cable, The electrical distance is determined using at least one of high-voltage pulse current method, high-voltage pulse electric platen press or secondary pulse process.
- A kind of 9. Cable fault examination system, it is characterised in that including：Control mechanism, detent mechanism and testing agency；It is described fixed Position mechanism and the testing agency communicate with the control mechanism to be connected；The electrical distance for the electrical distance between fault inspecting and test point and is fed back to institute by the testing agency State control mechanism；The control mechanism is used to be moved towards to determine the trouble point and by the trouble point according to the space of the cable Positional information feed back to the detent mechanism；The detent mechanism is used to determine the trouble point according to the positional information Actual geographic position；Wherein, moved towards along the space, the trouble point is equal to the electrical distance with the distance between described test point.
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Application publication date: 20180511 |