CN105954652A - Sheath grounding fault point locating method - Google Patents
Sheath grounding fault point locating method Download PDFInfo
- Publication number
- CN105954652A CN105954652A CN201610553804.3A CN201610553804A CN105954652A CN 105954652 A CN105954652 A CN 105954652A CN 201610553804 A CN201610553804 A CN 201610553804A CN 105954652 A CN105954652 A CN 105954652A
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- Prior art keywords
- signal
- wave radiation
- point
- power supply
- telecommunication
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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 a sheath grounding fault point locating method, and relates to the technical field of power cable maintenance. The operation steps are simple, the operation difficulty is reduced, fault point locating speed is high and working time is saved. The method is scientific and effective without influence of test environment, and the fault point locating result is accurate and high in reliability so that powerful support is provided for work personnel for timely maintenance of a fault point. The key points of the scheme are that a power supply electric signal is acquired; the power supply electric signal is converted into a detection signal; a detection point is selected within the range of a cable to be located and the detection signal is applied to the detection point so that the cable to be located is enabled to generate electromagnetic wave radiation to the outside; an electromagnetic wave radiation signal is received; the electromagnetic wave radiation signal is converted into a path indicating signal; and the path indicating signal and the electromagnetic wave radiation signal are displayed, and the position of the cable to be located is determined according to the path indicating signal and the position of a sheath grounding fault point is determined according to the electromagnetic wave radiation signal. The sheath grounding fault point locating method is mainly used for locating of the cable fault point.
Description
Technical field
The present invention relates to power cable maintenance technology field, particularly relate to a kind of sheath earth fault independent positioning method.
Background technology
Cable (electric cable) is made up of conductor and the outsourcing insulating protective layer of one or more mutually insulated,
It is mainly used in transmission, distribution electric energy or information.High tension cable (High electric cable) is the one in cable, refers to
For transmitting the cable between 10KV ~ 35KV, it is widely used in electric power transmission major trunk roads, plays very in current electric power transmits
Important effect.When cable laying, in order to avoid its suffer mechanical external force, high temperature, tan by the sun, raindrop erosion etc. damages, and
Improving landscaping degree, general employing is buried or channel-type lays.But, when in using, cable breaks down, such as,
Low-impedance earthed system fault, above-mentioned overhead cabling method brings huge difficulty will to its fault detect, localization of fault, therefore,
A can quickly, effectively detect, the instrument of positioning cable trouble point, become work at present personnel research and development the most important thing.
Science, accurately localization of fault instrument the most also do not occur, the existing detection to Method of Cable Trouble Point, fixed
Position usually uses multiple different instrument substep to realize: first, use diastimeter to measure the approximate location scope of failure cable；Its
Secondary, use path signal generator to determine the approximate location scope of trouble point on failure cable；Finally, must be by location earphone
By audiometry trouble point spark sound, finally determine the position of Method of Cable Trouble Point.
Electricity is carried out above by diastimeter, path signal generator and location earphone these three instrument substep, combination
Cable fault detect, the process of localization of fault, use detection, fixed point instrument quantity many, and equipment cost is big；Detection process is numerous and diverse,
Cost of labor is big；When trouble point is quiet trouble point, i.e. the least when trouble point resistance, when being close to zero, spark sound will be by
Screen layer in cable outsourcing insulating protective layer and armor bleed off enter ground, make this trouble point spark sound decibel also convergence be
Zero；Or, detection environment is noisy, and interference sound is big, then, use above-mentioned location earphone to cannot be carried out localization of fault,
Make whole cable fault point location interrupt, it is impossible to orient trouble point, the most absurd take artificial, and make the localization of fault cannot be complete
Become, cause cable fault point failure to continue, cause bigger transmission to endanger.
Summary of the invention
A kind of sheath earth fault independent positioning method that the present invention provides, step is simple, reduces operated by personnel difficult
Degree, localization of fault speed is fast, has saved the working time；Localization method scientific and effective, the not impact of tested person environment；Trouble point
Positioning result is accurate, and reliability is high, rushes to repair trouble point for staff in time and provides and support forcefully.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that
The present invention provides a kind of sheath earth fault independent positioning method, including:
Obtain the power supply signal of telecommunication；
Be converted to the described power supply signal of telecommunication detect signal；
In point to be located cable in-scope, choose test point, and described detection signal is put at described test point, make institute
State point to be located cable and externally produce electromagenetic wave radiation；
Receive described electromagenetic wave radiation signal；
Described electromagenetic wave radiation signal is converted to path indication signal；
Described path indication signal and described electromagenetic wave radiation signal are shown, in order to true according to described path indication signal
Determine described point to be located cable position and determine sheath ground connection event on described point to be located cable according to described electromagenetic wave radiation signal
The position of barrier point.
In conjunction with above-mentioned, further, described sheath earth fault independent positioning method, also include:
In point to be located cable in-scope, choose another test point, again determine described point to be located cable position and described in protect
The position of layer earth fault.
In conjunction with above-mentioned, described detection signal is direct current high voltage pulses current signal.
In conjunction with above-mentioned, further, described sheath earth fault independent positioning method, after obtaining the power supply signal of telecommunication,
Also include:
Contrast the described power supply signal of telecommunication and default operation threshold, it is judged that the described power supply signal of telecommunication is the most normal, if abnormal, carries out
Adjust.
In conjunction with above-mentioned, be converted to the described power supply signal of telecommunication detect signal, including:
By the boosting of the described power supply signal of telecommunication, rectification and pulsed discharge, the described power supply signal of telecommunication is made to be converted to direct current high voltage pulses electricity
Stream signal.
In conjunction with above-mentioned, receive described electromagenetic wave radiation signal, including:
Receive wave-shape amplitude numerical value and the waveform shape data of described electromagenetic wave radiation signal.
In conjunction with above-mentioned, described electromagenetic wave radiation signal is converted to path indication signal, including:
Wave-shape amplitude numerical value and the waveform shape data of described electromagenetic wave radiation signal are converted to described path indication signal.
A kind of sheath earth fault independent positioning method that the present invention provides, including: obtain the power supply signal of telecommunication；To power telecommunications
Number be converted to detect signal；In point to be located cable in-scope, choose test point, and detection signal put at test point,
Point to be located cable is made externally to produce electromagenetic wave radiation；Receive electromagenetic wave radiation signal；Electromagenetic wave radiation signal is converted to path
Indication signal；Path indication signal and electromagenetic wave radiation signal are shown, in order to determine undetermined according to path indication signal
Put cable position and determine the position of sheath earth fault on point to be located cable according to electromagenetic wave radiation signal, compared to existing
Having technology, operating procedure of the present invention is simple, reduces operated by personnel's difficulty, and localization of fault speed is fast, has saved work
Time；Methodological science is effective, the not impact of tested person environment, and localization of fault result is accurate, and reliability is high, for staff and
Time repairing trouble point provide and support forcefully.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, required use in embodiment being described below
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for this
From the point of view of the those of ordinary skill of field, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of sheath earth fault independent positioning method schematic flow sheet in the embodiment of the present invention 1；
Fig. 2 is a kind of sheath earth fault independent positioning method schematic flow sheet in the embodiment of the present invention 2；
Fig. 3 is a kind of path indication signal schematic diagram in the embodiment of the present invention 2；
Fig. 4 is another kind of path indication signal schematic diagram in the embodiment of the present invention 2；
Fig. 5 is another kind of path indication signal schematic diagram in the embodiment of the present invention 2；
Fig. 6 is a kind of electromagenetic wave radiation signal waveform data schematic diagram in the embodiment of the present invention 2；
Fig. 7 is another kind of electromagenetic wave radiation signal waveform data schematic diagram in the embodiment of the present invention 2；
Fig. 8 is another kind of electromagenetic wave radiation signal waveform data schematic diagram in the embodiment of the present invention 2.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe wholely.Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment 1
The embodiment of the present invention provides a kind of sheath earth fault independent positioning method, as it is shown in figure 1, include:
101, the power supply signal of telecommunication is obtained.
Wherein, the present embodiment signal of telecommunication of powering is provided by battery case, and i.e. the battery case output signal of telecommunication is that the present embodiment is powered
The signal of telecommunication.
102, be converted to the described power supply signal of telecommunication detect signal.
Wherein, by the boosting of the described power supply signal of telecommunication, rectification and pulsed discharge, the described power supply signal of telecommunication is made to be converted to direct current high
Pressure pulsed current signal.
103, in point to be located cable in-scope, choose test point, and described detection signal is put on described test point
Place, makes described point to be located cable externally produce electromagenetic wave radiation.
104, described electromagenetic wave radiation signal is received.
105, described electromagenetic wave radiation signal is converted to path indication signal.
106, described path indication signal and described electromagenetic wave radiation signal are shown, in order to refer to according to described path
Show that signal determines that described point to be located cable position and determining according to described electromagenetic wave radiation signal protects on described point to be located cable
The position of layer earth fault.
A kind of sheath earth fault independent positioning method that the present invention provides, including: obtain the power supply signal of telecommunication；To power telecommunications
Number be converted to detect signal；In point to be located cable in-scope, choose test point, and detection signal put at test point,
Point to be located cable is made externally to produce electromagenetic wave radiation；Receive electromagenetic wave radiation signal；Electromagenetic wave radiation signal is converted to path
Indication signal；Path indication signal and electromagenetic wave radiation signal are shown, in order to determine undetermined according to path indication signal
Put cable position and determine the position of sheath earth fault on point to be located cable according to electromagenetic wave radiation signal, compared to existing
Having technology, operating procedure of the present invention is simple, reduces operated by personnel's difficulty, and localization of fault speed is fast, has saved work
Time；Methodological science is effective, the not impact of tested person environment, and localization of fault result is accurate, and reliability is high, for staff and
Time repairing trouble point provide and support forcefully.
Embodiment 2
The embodiment of the present invention provides a kind of sheath earth fault independent positioning method, as in figure 2 it is shown, include:
201, the power supply signal of telecommunication is obtained.
Wherein, the present embodiment signal of telecommunication of powering is provided by battery case, and i.e. the battery case output signal of telecommunication is that the present embodiment is powered
The signal of telecommunication.
202, the described power supply signal of telecommunication and default operation threshold are contrasted, it is judged that the described power supply signal of telecommunication is the most normal, if not
Normally, it is adjusted.
203, be converted to the described power supply signal of telecommunication detect signal.
Wherein, by the boosting of the described power supply signal of telecommunication, rectification and pulsed discharge, the described power supply signal of telecommunication is made to be converted to direct current high
Pressure pulsed current signal.
204, in point to be located cable in-scope, choose test point, and described detection signal is put on described test point
Place, makes described point to be located cable externally produce electromagenetic wave radiation.
205, described electromagenetic wave radiation signal is received.
Wherein, wave-shape amplitude numerical value and the waveform shape data of described electromagenetic wave radiation signal are received
206, described electromagenetic wave radiation signal is converted to path indication signal.
Wherein, wave-shape amplitude numerical value and the waveform shape data of described electromagenetic wave radiation signal are converted to described path and refer to
Show signal.Wave-shape amplitude numerical value according to electromagenetic wave radiation signal determines the path direction indication signal of convergence point to be located cable.
Waveform shape data according to electromagenetic wave radiation signal determine sheath grounding fault point position.
207, described path indication signal and described electromagenetic wave radiation signal are shown, in order to refer to according to described path
Show that signal determines that described point to be located cable position and determining according to described electromagenetic wave radiation signal protects on described point to be located cable
The position of layer earth fault.
Hereinafter will illustrate as a example by path indication signal and electromagenetic wave radiation signal show: if as it is shown on figure 3,
Amplification value " (259) " shows on " double-head arrow " left side, advances the most to the right；As shown in Figure 4, if amplification value " (356) " shows
On " double-head arrow " the right, advance the most to the left；As it is shown in figure 5, if amplification value " (035) " shows in the middle of double-head arrow, and " 035 "
Less than preset value " 50 ", then arrive point to be located cable position.As shown in Figure 6, if electromagnetic wave wave amplitude is big, then along point to be located cable side
To continuing on；If as it is shown in fig. 7, electromagnetic wave wave amplitude is close to zero, then retreat along point to be located cable direction；As shown in Figure 8, if
Electromagnetic wave wave amplitude occur being gradually reduced level off to zero critical point, then it represents that arrive fault point, complete described sheath ground connection therefore
The location of barrier point.
208, in point to be located cable in-scope, choose another test point, again determine described point to be located cable position with
And the position of described sheath earth fault.
A kind of sheath earth fault independent positioning method that the present invention provides, including: obtain the power supply signal of telecommunication；To power telecommunications
Number be converted to detect signal；In point to be located cable in-scope, choose test point, and detection signal put at test point,
Point to be located cable is made externally to produce electromagenetic wave radiation；Receive electromagenetic wave radiation signal；Electromagenetic wave radiation signal is converted to path
Indication signal；Path indication signal and electromagenetic wave radiation signal are shown, in order to determine undetermined according to path indication signal
Put cable position and determine the position of sheath earth fault on point to be located cable according to electromagenetic wave radiation signal, compared to existing
Having technology, operating procedure of the present invention is simple, reduces operated by personnel's difficulty, and localization of fault speed is fast, has saved work
Time；Methodological science is effective, the not impact of tested person environment, and localization of fault result is accurate, and reliability is high, for staff and
Time repairing trouble point provide and support forcefully.
Further, the present embodiment chooses another test point in point to be located cable in-scope, again determine described in treat
Fixed point cable position and the position of described sheath earth fault, again ensured that localization of fault result accuracy and
Reliability.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement, all answer
Contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with described scope of the claims
Accurate.
Claims (7)
1. a sheath earth fault independent positioning method, it is characterised in that including:
Obtain the power supply signal of telecommunication；
Be converted to the described power supply signal of telecommunication detect signal；
In point to be located cable in-scope, choose test point, and described detection signal is put at described test point, make institute
State point to be located cable and externally produce electromagenetic wave radiation；
Receive described electromagenetic wave radiation signal；
Described electromagenetic wave radiation signal is converted to path indication signal；
Described path indication signal and described electromagenetic wave radiation signal are shown, in order to true according to described path indication signal
Determine described point to be located cable position and determine sheath ground connection event on described point to be located cable according to described electromagenetic wave radiation signal
The position of barrier point.
Sheath earth fault independent positioning method the most according to claim 1, it is characterised in that also include:
In point to be located cable in-scope, choose another test point, again determine described point to be located cable position and described in protect
The position of layer earth fault.
Sheath earth fault independent positioning method the most according to claim 1, it is characterised in that:
Described detection signal is direct current high voltage pulses current signal.
Sheath earth fault independent positioning method the most according to claim 1, it is characterised in that obtain power supply the signal of telecommunication it
After, also include:
Contrast the described power supply signal of telecommunication and default operation threshold, it is judged that the described power supply signal of telecommunication is the most normal, if abnormal, carries out
Adjust.
Sheath earth fault independent positioning method the most according to claim 1, it is characterised in that: the described power supply signal of telecommunication is turned
It is changed to detect signal, including:
By the boosting of the described power supply signal of telecommunication, rectification and pulsed discharge, the described power supply signal of telecommunication is made to be converted to direct current high voltage pulses electricity
Stream signal.
Sheath earth fault independent positioning method the most according to claim 1, it is characterised in that receive described electromagenetic wave radiation
Signal, including:
Receive wave-shape amplitude numerical value and the waveform shape data of described electromagenetic wave radiation signal.
Sheath earth fault independent positioning method the most according to claim 6, it is characterised in that described electromagenetic wave radiation is believed
Number be converted to path indication signal, including:
Wave-shape amplitude numerical value and the waveform shape data of described electromagenetic wave radiation signal are converted to described path indication signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610553804.3A CN105954652A (en) | 2016-07-14 | 2016-07-14 | Sheath grounding fault point locating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610553804.3A CN105954652A (en) | 2016-07-14 | 2016-07-14 | Sheath grounding fault point locating method |
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| CN105954652A true CN105954652A (en) | 2016-09-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771857A (en) * | 2016-12-05 | 2017-05-31 | 广西电网有限责任公司柳州供电局 | Cross-inked polyethylene power cable insulation defect characteristic gas detecting system |
| CN108519537A (en) * | 2018-03-01 | 2018-09-11 | 华南理工大学 | Leak electricity greatly flow calculation methodologies under a kind of cable metal sheath multipoint earthing |
| CN113093267A (en) * | 2021-05-08 | 2021-07-09 | 北京潞电电气设备有限公司 | Method for identifying cable line path |
| CN113093268A (en) * | 2021-05-08 | 2021-07-09 | 北京潞电电气设备有限公司 | Method for automatically identifying cable line path |
| CN113093269A (en) * | 2021-05-08 | 2021-07-09 | 北京潞电电气设备有限公司 | Method for automatically identifying cable line path |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771857A (en) * | 2016-12-05 | 2017-05-31 | 广西电网有限责任公司柳州供电局 | Cross-inked polyethylene power cable insulation defect characteristic gas detecting system |
| CN108519537A (en) * | 2018-03-01 | 2018-09-11 | 华南理工大学 | Leak electricity greatly flow calculation methodologies under a kind of cable metal sheath multipoint earthing |
| CN108519537B (en) * | 2018-03-01 | 2019-10-18 | 华南理工大学 | Leak electricity greatly flow calculation methodologies under a kind of cable metal sheath multipoint earthing |
| CN113093267A (en) * | 2021-05-08 | 2021-07-09 | 北京潞电电气设备有限公司 | Method for identifying cable line path |
| CN113093268A (en) * | 2021-05-08 | 2021-07-09 | 北京潞电电气设备有限公司 | Method for automatically identifying cable line path |
| CN113093269A (en) * | 2021-05-08 | 2021-07-09 | 北京潞电电气设备有限公司 | Method for automatically identifying cable line path |
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