CN110346688A - A kind of high pressure complexity cable fault quick segmentation differentiates and localization method - Google Patents
A kind of high pressure complexity cable fault quick segmentation differentiates and localization method Download PDFInfo
- Publication number
- CN110346688A CN110346688A CN201910699392.8A CN201910699392A CN110346688A CN 110346688 A CN110346688 A CN 110346688A CN 201910699392 A CN201910699392 A CN 201910699392A CN 110346688 A CN110346688 A CN 110346688A
- Authority
- CN
- China
- Prior art keywords
- fault
- cable
- current
- section
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The present invention provides a kind of high pressure complexity cable fault quick segmentation and differentiates and localization method.A kind of high pressure complexity cable fault quick segmentation differentiates and localization method, including the judgement of minimum fault section and fault location.Terminal injects constant electric current into failure cable route using the high-voltage constant-current power supply of negative polarity outdoors, utilize the DC current signal of direct current signal intelligent acquisition device detection threephase cable transition joint metallic sheath, judge fault point in the leading portion section or back segment section of test point according to the DC current signal, the range of fault section is constantly reduced using dichotomy, minimum fault section is obtained, finds fault point using intelligent voltage comparison method and cable fault pinpoint method in minimum fault section.The method that the present invention is differentiated by segment failure and quickly positioned improves cable fault search efficiency, shortens power off time, improves power supply reliability, has very high market application value.
Description
Technical field
The present invention relates to high-tension circuit fault location fields, quick more particularly, to a kind of high pressure complexity cable fault
Segmentation differentiates and localization method.
Background technique
High-tension cable is taken up an area less with it, lays convenience, personal safety guarantee, power supply reliability is high, maintenance workload is few etc.
Advantage is widely applied in high voltage power transmission and transforming network.Rapid development and city rule with the construction of China large- and-medium size cities
The requirement drawn, the scale of electric system power transmission and transformation network is also increasing, the high voltage power transmission and transforming of especially 110kV and ratings above
Network.Cable and a complicated system in network, may contain GIS terminal；T connector may be contained；It may be long line
Road includes multiple cross interconnected sections.Insulation breakdown once occurs for cable, often several days can not fault point, delay power supply when
Between, reduce power supply reliability.Currently on the market for cable fault positioning master in 110kV and above power transmission and transformation network
Three kinds of method are dropped using Murray bridge method, traveling wave bounce technique and intelligent voltage.
And be classical method to breakdown point location using Murray electric bridge, it is convenient and accurate.But electric bridge can only obtain hundred
Divide ratio, manually calculates fault point distance.Sometimes due to the load current for closing on operation cable generates Hz noise, damage electric bridge inspection
Flowmeter, or cannot balance, or because exchange participates in bridge balance, localization ratio error is big.
Traveling wave bounce technique mainly has secondary pulse process, three times impulse method and pulse current method.The wave that pulse current method measures
Shape is complicated, understands difficulty of getting up, the reflected impulse that babe in the wood is difficult to be out of order a little.Secondary pulse process remains arteries and veins
Low Voltage Impulse Method, is introduced the test of high resistive fault by the way for rushing current method high-voltage signal breakdown fault point, makes waveform more
It is readily appreciated that, convenient for grasping.Impulse method three times, first by high pressure short-time pulse breakdown fault point, followed by middle pressure pulse maintains foot
Enough long arcings, synchronize action of low-voltage pulse relatively reliable.But because high-tension cable possesses cross interconnected, T connector, wave impedance generates prominent
Become, keeps positioning back wave sufficiently complex, it is difficult to position, high-voltage pulse also has energy loss in the point, it is difficult to reach at a distance.
Intelligent voltage comparison method can solve the fault location such as the low-resistance of high pressure complexity cable, stable type high resistant, and precision is high, effect
Rate is high.But intelligent voltage comparison method needs the both ends core by failure cable and relief cable to extract, and one end is test lead, separately
One end connects shorting stub.GIS terminal is especially extensive in cable run application, and the GIS terminal of some producers can pass through ground hilt
Cable extracts, but in view of GIS terminal safety, some units, which do not allow, applies high pressure in GIS terminal earthing knife-switch；And some producers
Impenetrably knife extracts cable core to GIS terminal at all, needs that several days time is spent to open GIS gas chamber, heavy workload.
It is used in the Voltage Cable Lines Construction fault location of long transmission line relatively difficult.
Summary of the invention
The present invention is that above-mentioned operation described in background technology is overcome to understand that difficult, localization ratio is poor, is not suitable for long line
The problem of high-tension circuit on road, provides a kind of high pressure complexity cable fault quick segmentation and differentiates and localization method；The present invention is applicable in
In the fault location of the complex high voltage circuit of long transmission line, operation understanding is fairly simple, and segmentation investigation can carry out simultaneously, accelerates failure
The working efficiency of positioning shortens power off time.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of high pressure complexity cable fault quickly divides
Section differentiates and localization method, comprising the following steps:
Fault section judgement:
Step 1: cable in three-phase high-voltage cable system and other electrical equipments are disconnected, it is permanent using the high pressure of negative polarity
Galvanic electricity source P injects constant current I into three-phase high-voltage cable system, so that the electric current I is flowed through fault point, then through the failure electricity
Cable metallic sheath or cable core flow back to the high-voltage constant-current power supply P；
Step 2: using the DC current signal of direct current signal detection device detection threephase cable transition joint metallic sheath,
Judge the fault point in the leading portion section or back segment section of test point according to the DC current signal；
Step 3: reducing using sectional detecting method and determining new fault section；
Step 4: if it is determined that the length value of new fault section when being greater than predetermined threshold, repeat second step and third step；
If the length value of fault section is less than predetermined threshold, minimum fault section is obtained；
Fault location: the core of the outdoor terminal of phase where minimum fault section is grounded, in the minimum fault section
The position of the fault point is found using intelligent voltage comparison method and cable fault pinpoint device.In this way, three-phase electricity cable
Joint metal set is installed in the system of road, in the failure cable route that insulation breakdown occurs for fault point, is believed using DC current
Number, judged by piecewise interval, rapidly reduce the fault section where fault point, when investigation obtains fault section less than predetermined
When threshold value, the method being grounded using outdoor terminal core utilizes intelligent voltage comparison method and cable fault accurate positioning device energy
The accurate position for determining fault point, entire technical solution is readily understood, easy to operate.
Preferably, the sectional detecting method is dichotomy.
Further, the mode of action of the high-voltage constant-current power supply P and the electric current I include one of following scenario described:
(1) both ends of the high-voltage constant-current power supply P are connect with the core of failure cable and metallic sheath respectively, pass through high pressure perseverance
Galvanic electricity source P flows through the failure to constant electric current I, the electric current I is injected between the core or metallic sheath of the failure cable
When the fault point of insulation breakdown occurring in cable run, the power supply P can be flowed back to through the core of metallic sheath or cable.
(2) both ends of the high-voltage constant-current power supply P are connect with the core of failure cable and the earth respectively, pass through high voltage and constant current
Power supply P is to injecting constant electric current I, the electric current I by earth mat by metallic sheath between the core or the earth of the failure cable
Ground connection flows through the fault point that insulation breakdown occurs in the failure cable route, then the core through cable flows back to the power supply P.
In this way, metallic sheath is generally directly grounded using cross interconnected or one end due to high-tension cable in order to avoid grounding circulation is excessive
Other end protective grounding two ways, then in the cross interconnected failure cable system of metallic sheath, using situation (1)；In gold
Belong to set one end to be directly grounded, in the failure cable system that the other end is directly grounded, using situation (2).
Further, the direct current signal detection device includes:
DC current couples clamp: coupling tested cable metal and puts on the DC current flowed through.
Filter circuit: the DC current that clamp couple is become into voltage signal, and the common mode electricity being made up of inductance capacitance
Road inhibits common-mode signal to enter AD conversion circuit, filters out Hz noise by the low-pass filter circuit that resistance capacitance forms.
A/D conversion: being converted to digital signal for DC voltage, handles convenient for digital circuit.
Digital processing and display unit: handling the digital signal of A/D conversion, will according to current sampling resistor size
The d. c. voltage signal of acquisition is converted into DC current and shows.
Further, the intelligent voltage comparison method is that metallic sheath M, the N at the minimum fault section both ends is hanging,
It again will be hanging with metallic sheath O, P on the relative position M, N in the adjacent phase of minimum fault section；Using M and O as test head end, N and
P is shorted using thick line as test tail end, is dropped to obtain proportional numerical value according to test voltage, according to the cable length of smallest interval,
Calculate the fault point to minimum fault section both ends distance.
Preferably, the cable fault pinpoint device includes:
Fault location power supply: high-voltage pulse is applied by the M point over the ground；
Position determination of fault instrument: detection failure point electric discharge sound wave, magnetic field, sound right above the minimum fault section laying path
Magnetic time difference, finds fault point.
In this way, the outdoor terminal in the high pressure threephase cable circuit of long transmission line, utilizes the high-voltage constant-current power supply of negative polarity
Terminal injects stable electric current outdoors, and electric current flows through the metallic sheath of cable, in the line the gold at the insulating joint both ends at point
Belong to set and is grounded several hundred milliamperes for capable of being coupled on metallic sheath using the DC current clamp in direct current signal intelligent acquisition device
The DC current that DC current clamp couple is become voltage signal by filter circuit, and is made up of inductance capacitance by electric current
Common-mode circuit inhibit common-mode signal enter A/D conversing circuits, power frequency is filtered out by the low-pass filter circuit that resistance capacitance forms and is done
It disturbs, then DC voltage is converted into digital signal, the number most converted afterwards through digital processing element to A/D through A/D conversing circuits
Signal is handled, and the d. c. voltage signal of acquisition is converted into DC current according to current sampling resistor size and is shown.Root
According to the numerical value and DC current signal of the DC current signal detected and the curent change rule of high-voltage constant-current power supply, event is judged
Barrier point is in the leading portion section or back segment section of test point, if fault point is in the leading portion section of test point, next test point
Insulating joint in the centre in route leading portion section, if fault point is in the back segment section of test point, next test point is rear
The insulating joint in section section；Dichotomy is utilized in this way, the range of fault section can be constantly reduced, until obtaining a faulty section
Between when being less than scheduled threshold value, be minimum fault section by this section definition；Then by the open air of phase where minimum fault section
The cable core of terminal is grounded, then the metal protection protector at minimum fault section both ends is hanging, and both ends are identified as M and N, adjacent
Xiang Shangyu M and N opposite station location marker is O and P, and the corresponding metallic sheath of O and P is hanging, using intelligent voltage comparison method, M and O
As test head end, N and P are shorted using tubbiness line as test tail end, obtain proportional numerical value according to intelligent voltage comparison method,
According to the cable length of smallest interval, the distance of fault point position is calculated.It can be thus segmented investigation, quickly reduced
The cable core of outdoor terminal is grounded by fault section when the distance of fault section is smaller, can be more using intelligent voltage method
It is accurately determined the distance of fault point, fault location power supply is recycled, high-voltage pulse is applied by M point over the ground, it is fixed by failure
Point instrument, detection failure point electric discharge sound wave, magnetic field, sound magnetic time difference, essence right above minimum fault section cable run
Really find the position of fault point.
Compared with prior art, beneficial effect is:
1. operation understanding is fairly simple, segmentation investigation can carry out simultaneously, accelerate the working efficiency of fault location, shorten and have a power failure
Time.
2. in minimum fault section, since cable distance is shorter, by the outdoor terminal of phase where minimum fault section
Cable core ground connection, can more accurately find fault point using intelligent voltage method and accurate positioning device, error is smaller, and efficiency is more
It is high.
Detailed description of the invention
Fig. 1 is the flow diagram of direct current signal intelligent acquisition device in the present invention.
Fig. 2 is that the metallic sheath of the invention that is used in uses fault section in cross interconnected cable system to judge structural representation
Figure.
Fig. 3 is that the present invention is used in metallic sheath using the structural representation of fault point in cross interconnected cable system
Figure.
Fig. 4 is that the metallic sheath of the invention that is used in uses one end to be directly grounded failure in the cable system of other end protective grounding
The structural schematic diagram of interval judgement.
Fig. 5 is that the metallic sheath of the invention that is used in uses one end to be directly grounded failure in the cable system of other end protective grounding
Location structure schematic diagram.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable.Being given for example only property of positional relationship is described in attached drawing
Illustrate, should not be understood as the limitation to this patent.
Below by specific embodiment, and in conjunction with attached drawing, technical scheme of the present invention is further described:
Embodiment 1
The present invention provides a kind of high pressure complexity cable fault quick segmentation and differentiates and localization method, including fault section judgement
And fault location, it is specific:
Fault section judgement:
As shown in Fig. 2, failure cable GA and other electrical equipments are disconnected, terminal NA utilizes the high pressure of negative polarity outdoors
Constant-current supply P flows through the metallic sheath of cable, flows through failure toward constant electric current I, I is injected between failure cable core and metallic sheath
Point flows back to power supply P through cable core.
Step 1: with dichotomy, first in the J of route3A、J3B、J3CConnector two sides ground line is examined using DC current clamp
It surveys.As long as in J3A、J3B、J3CAny one connector ground line segmented current detector detect DC current, size close to I, and
The curent change rule and high pressure crossing current source current variation are consistent: source current increases, and electric current and then increases herein, power supply electricity
Stream reduces electric current herein and reduces, and it is zero that power supply, which closes electric current herein,.Fault point is in J3Connector is to GABetween.
Second step, using dichotomy, in route J4A、J4B、J4CIt is detected using DC current clamp connector two sides.Segmentation electricity
Current sensor detects DC current, and the electric current is consistent with source current changing rule: source current increase, herein electric current with
Increase, source current reduce herein electric current reduce, power supply close herein electric current be zero.Fault point is in J4Connector is to GABetween.
Third step, in route J5A、J5B、J5CIt is detected using DC current clamp connector two sides.The detection of segmented current detector
It is zero to DC current.Therefore it can determine whether fault point in J4To J5Between connector, including insulating joint J4AClose to GASide, J4ATo J5AElectricity
Cable ontology, insulating joint J5AClose to NASide.
Wherein, as shown in Figure 1, direct current signal intelligent acquisition device, comprising:
(1) DC current couples clamp: coupling tested cable metal and puts on the DC current flowed through.
(2) DC current that clamp couple filter circuit: is become into voltage signal, and the common mode being made up of inductance capacitance
Circuit inhibits common-mode signal to enter AD conversion circuit, filters out Hz noise by the low-pass filter circuit that resistance capacitance forms.
(3) A/D is converted: DC voltage being converted to digital signal, is handled convenient for digital circuit.
(4) digital processing and display unit: handling the digital signal of A/D conversion, big according to current sampling resistor
It is small that the d. c. voltage signal of acquisition is converted into DC current and is shown.
Fault location judgement
By the core ground connection of the outdoor terminal of phase where minimum fault section, intelligent voltage ratio is utilized in minimum fault section
Compared with the position that method and cable fault pinpoint device find the fault point.
The insulating sheath of high-tension cable will carry out routine test every year, it is ensured that insulating sheath is in order.Cable by
When destroying generation major insulation breakdown to external force, breakage occurs with oversheath simultaneously at major insulation breakdown point；It is run in cable
In the process, when major insulation breakdown occurs, oversheath insulation is without breakage at some breakdown points.
As shown in figure 3, by failure phase NAEnd cable core ground connection will protect outside the section cable metal of the minimum fault section of A phase
Set is hanging, and metallic sheath both ends are identified as M and N；By B phase J4To J5Section cable metal set is hanging, and both ends are identified as O and P.Utilize intelligence
Energy voltage comparison method, M and O are used as test tail end as test head end, N and P, and tubbiness line is utilized to be shorted, according to intelligent voltage
Comparison method obtains proportional numerical value, according to J4To J5Section cable length, calculates fault point F distance J4The position of connector；Finally in determination
The position of the fault point is found in range using cable fault pinpoint device.
This segment failure differentiates and localization method, simplifies complicated line fault search procedure, substantially increases failure
Lookup and cable remediation efficiency improve power supply reliability for power supply and have great importance.
Embodiment 2
The present embodiment is similar with embodiment 1, the difference is that:
The cable system to be broken down is by the way of metallic sheath is directly grounded other end protective grounding using one end.
Fault section judgement: as shown in figure 4, failure cable GA and other electrical equipments are disconnected, terminal NA is sharp outdoors
It is passed through toward constant electric current I, electric current I is injected between failure cable core and the earth by earth mat with the high-voltage constant-current power supply P of negative polarity
It crosses metallic sheath to be directly grounded, through faulty section metallic sheath, flows through fault point, the core through failure cable flows back to power supply P.
It is illustrated in figure 5 the cable system fault location structure that metallic sheath is directly grounded other end protective grounding using one end
Failure phase NA end cable core is grounded by schematic diagram in Fig. 5.
The step of other parts of the present embodiment and working principle are identical as embodiment.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (6)
1. a kind of high pressure complexity cable fault quick segmentation differentiates and localization method, it is characterized in that: including:
Fault section judgement:
Step 1: cable in three-phase high-voltage cable system and other electrical equipments are disconnected, the high voltage and constant current electricity of negative polarity is utilized
Source P injects constant current I into three-phase high-voltage cable system, and the electric current I is made to flow through fault point, then the metal through failure cable
Set or cable core flow back to the high-voltage constant-current power supply P；
Step 2: using the DC current signal of direct current signal detection device detection threephase cable transition joint metallic sheath, according to
The DC current signal judges the fault point in the leading portion section or back segment section of test point；
Step 3: reducing using sectional detecting method and determining new fault section；
Step 4: if it is determined that the length value of new fault section when being greater than predetermined threshold, repeat second step and third step；If therefore
When hindering the length value in section less than predetermined threshold, minimum fault section is obtained；
Fault location: the cable core of the outdoor terminal of phase where minimum fault section is grounded, in the minimum fault section
The position of the fault point is found using intelligent voltage comparison method and cable fault pinpoint device.
2. high pressure complexity cable fault quick segmentation according to claim 1 differentiates and localization method, it is characterized in that: described
Sectional detecting method is dichotomy.
3. high pressure complexity cable fault quick segmentation according to claim 1 differentiates and localization method, it is characterized in that: described
The mode of action of high-voltage constant-current power supply P and the electric current I include one of following scenario described:
(1) both ends the high-voltage constant-current power supply P are connect with the core of failure cable and metallic sheath respectively, pass through high-voltage constant-current power supply
P flows through the failure to constant electric current I, the electric current I is injected between the failure cable core or failure cable metallic sheath
When the fault point of insulation breakdown occurring in cable run, it can be flowed back to through the failure cable metallic sheath or the failure cable core
The power supply P.
(2) both ends of the high-voltage constant-current power supply P are connect with the core of failure cable and the earth respectively, pass through high-voltage constant-current power supply
P is flowed to constant electric current I, the electric current I is injected between the failure cable core and the earth by earth mat by metallic sheath ground connection
It crosses in the failure cable route and the fault point of insulation breakdown occurs, then flow back to the power supply P through the failure cable core.
4. high pressure complexity cable fault quick segmentation according to claim 1 differentiates and localization method, it is characterized in that: described
Direct current signal detection device include:
DC current couples clamp: coupling tested cable metal and puts on the DC current flowed through；
Filter circuit: the DC current that clamp couple is become into voltage signal, and is pressed down by the common-mode circuit that inductance capacitance forms
Common-mode signal processed enters AD conversion circuit, filters out Hz noise by the low-pass filter circuit that resistance capacitance forms；
A/D conversion: being converted to digital signal for DC voltage, handles convenient for digital circuit；
Digital processing and display unit: handling the digital signal of A/D conversion, will be obtained according to current sampling resistor size
D. c. voltage signal be converted into DC current and show.
5. high pressure complexity cable fault quick segmentation according to claim 1 differentiates and localization method, it is characterized in that: described
Intelligent voltage comparison method be that metallic sheath M, the N at the minimum fault section both ends is hanging then minimum fault section is adjacent
Metallic sheath O, P on Xiang Shangyu M, the relative position N is hanging；Using M and O as test head end, N and P are as test tail end, using thick
Line is shorted, and calculates the fault point to most according to the cable length of minimum fault section according to the proportional numerical value that test voltage drops
The distance at glitch section both ends.
6. high pressure complexity cable fault quick segmentation according to claim 5 differentiates and localization method, it is characterized in that: described
Cable fault pinpoint device include:
Fault location power supply: high-voltage pulse is applied by the M point over the ground；
Position determination of fault instrument: surface detection failure point electric discharge sound wave, magnetic field or sound in the minimum fault section laying path
Magnetic time difference, finds fault point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910699392.8A CN110346688B (en) | 2019-07-31 | 2019-07-31 | Method for rapidly judging and positioning faults of high-voltage complex cables of 110kV or above in segmented manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910699392.8A CN110346688B (en) | 2019-07-31 | 2019-07-31 | Method for rapidly judging and positioning faults of high-voltage complex cables of 110kV or above in segmented manner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110346688A true CN110346688A (en) | 2019-10-18 |
| CN110346688B CN110346688B (en) | 2021-03-02 |
Family
ID=68183453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910699392.8A Active CN110346688B (en) | 2019-07-31 | 2019-07-31 | Method for rapidly judging and positioning faults of high-voltage complex cables of 110kV or above in segmented manner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110346688B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110866739A (en) * | 2019-11-29 | 2020-03-06 | 国网四川省电力公司电力科学研究院 | Power distribution network comprehensive power failure time representation method considering troubleshooting path |
| CN111999617A (en) * | 2020-09-04 | 2020-11-27 | 广东电网有限责任公司肇庆供电局 | Simulation test device for cable fault simulation by using retreating line |
| CN112858838A (en) * | 2021-01-22 | 2021-05-28 | 广东电网有限责任公司 | Cable fault positioning system and method |
| CN113009302A (en) * | 2021-03-18 | 2021-06-22 | 奇瑞新能源汽车股份有限公司 | Method and device for positioning insulation fault of high-voltage system of electric automobile |
| CN113189442A (en) * | 2021-04-06 | 2021-07-30 | 渝丰科技股份有限公司 | Municipal buried cable breakage detection system and method based on network nerve cable |
| CN115032509A (en) * | 2022-06-23 | 2022-09-09 | 海南电网有限责任公司乐东供电局 | Rapid positioning device and method for cable fault point |
| CN115144791A (en) * | 2022-09-06 | 2022-10-04 | 浙江新图维电子科技有限公司 | Method and system for online detection of high-voltage cable armor grounding state |
| CN116718875A (en) * | 2023-08-10 | 2023-09-08 | 国网江苏省电力有限公司电力科学研究院 | Positioning method and instrument for sheath layer grounding in high-voltage cable single-end grounding system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760467A (en) * | 2014-01-27 | 2014-04-30 | 西安兴汇电力科技有限公司 | Method for inspecting single-phase earth fault point of power distribution network |
| JP5490989B2 (en) * | 2006-12-22 | 2014-05-14 | ゼネラル・エレクトリック・カンパニイ | Multi-end fault location system |
| CN105137292A (en) * | 2015-09-22 | 2015-12-09 | 国家电网公司 | Direct-current signal intelligent acquiring device used for high-voltage cable fault positioning |
| CN105699856A (en) * | 2016-04-18 | 2016-06-22 | 国网上海市电力公司 | Cable fault locating system and method based on intelligent acquisition and analysis |
| CN108303617A (en) * | 2018-02-02 | 2018-07-20 | 西安沣源智能装备科技有限公司 | A kind of fault location system |
-
2019
- 2019-07-31 CN CN201910699392.8A patent/CN110346688B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5490989B2 (en) * | 2006-12-22 | 2014-05-14 | ゼネラル・エレクトリック・カンパニイ | Multi-end fault location system |
| CN103760467A (en) * | 2014-01-27 | 2014-04-30 | 西安兴汇电力科技有限公司 | Method for inspecting single-phase earth fault point of power distribution network |
| CN105137292A (en) * | 2015-09-22 | 2015-12-09 | 国家电网公司 | Direct-current signal intelligent acquiring device used for high-voltage cable fault positioning |
| CN105699856A (en) * | 2016-04-18 | 2016-06-22 | 国网上海市电力公司 | Cable fault locating system and method based on intelligent acquisition and analysis |
| CN108303617A (en) * | 2018-02-02 | 2018-07-20 | 西安沣源智能装备科技有限公司 | A kind of fault location system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110866739B (en) * | 2019-11-29 | 2022-08-12 | 国网四川省电力公司电力科学研究院 | Power distribution network comprehensive power failure time representation method considering troubleshooting path |
| CN110866739A (en) * | 2019-11-29 | 2020-03-06 | 国网四川省电力公司电力科学研究院 | Power distribution network comprehensive power failure time representation method considering troubleshooting path |
| CN111999617A (en) * | 2020-09-04 | 2020-11-27 | 广东电网有限责任公司肇庆供电局 | Simulation test device for cable fault simulation by using retreating line |
| CN112858838A (en) * | 2021-01-22 | 2021-05-28 | 广东电网有限责任公司 | Cable fault positioning system and method |
| CN113009302B (en) * | 2021-03-18 | 2023-03-21 | 奇瑞新能源汽车股份有限公司 | Method and device for positioning insulation fault of high-voltage system of electric automobile |
| CN113009302A (en) * | 2021-03-18 | 2021-06-22 | 奇瑞新能源汽车股份有限公司 | Method and device for positioning insulation fault of high-voltage system of electric automobile |
| CN113189442A (en) * | 2021-04-06 | 2021-07-30 | 渝丰科技股份有限公司 | Municipal buried cable breakage detection system and method based on network nerve cable |
| CN113189442B (en) * | 2021-04-06 | 2024-02-02 | 渝丰科技股份有限公司 | Municipal buried cable breakage detection system and method based on network nerve cable |
| CN115032509A (en) * | 2022-06-23 | 2022-09-09 | 海南电网有限责任公司乐东供电局 | Rapid positioning device and method for cable fault point |
| CN115032509B (en) * | 2022-06-23 | 2023-11-14 | 海南电网有限责任公司乐东供电局 | Quick positioning device and method for cable fault point |
| CN115144791A (en) * | 2022-09-06 | 2022-10-04 | 浙江新图维电子科技有限公司 | Method and system for online detection of high-voltage cable armor grounding state |
| CN116718875A (en) * | 2023-08-10 | 2023-09-08 | 国网江苏省电力有限公司电力科学研究院 | Positioning method and instrument for sheath layer grounding in high-voltage cable single-end grounding system |
| CN116718875B (en) * | 2023-08-10 | 2023-12-15 | 国网江苏省电力有限公司电力科学研究院 | Positioning method and instrument for sheath layer grounding in high-voltage cable single-end grounding system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110346688B (en) | 2021-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110346688A (en) | A kind of high pressure complexity cable fault quick segmentation differentiates and localization method | |
| Wang et al. | A pilot protection scheme for transmission lines in VSC-HVDC grid based on similarity measure of traveling waves | |
| CN106093700B (en) | A kind of fault wave recording device and distance measuring method based on voltage traveling wave principle | |
| CN106443329B (en) | A kind of direct current grounding pole line fault detection system and method | |
| CN106468752B (en) | The solid circuit breaker RCD buffer circuit and Fault Locating Method of integrated fault location | |
| CN104698311B (en) | A kind of DC line direct current arrester live detection method | |
| CN108646144A (en) | A kind of offline distance measuring method of high voltage single-core cable short trouble, apparatus and system | |
| CN103344889B (en) | The method of cable local discharge measured by a kind of electric capacity wire jumper | |
| Jensen et al. | Online fault location on AC cables in underground transmission systems using sheath currents | |
| US10345363B2 (en) | High-fidelity voltage measurement using resistive divider in a capacitance-coupled voltage transformer | |
| Zhang et al. | An improved technique for online PD detection on covered conductor lines | |
| CN109387733A (en) | A kind of distribution circuit single-phase earth fault localization method and system | |
| CN106771843B (en) | Fault traveling wave distance measurement method for single-core power cable | |
| Qu et al. | Model-free underground cable incipient fault location using two-terminal zero-sequence measurements | |
| Sun et al. | A distribution line fault location estimation algorithm based on electromagnetic time-reversal method calculated in the finite difference time domain | |
| CN203405561U (en) | Direct current power source grounding fault searching device | |
| Peng et al. | Edge computing based fault sensing of the distribution cables based on time-domain analysis of grounding line current signals | |
| Elkalashy et al. | Earth fault distance estimation using travelling waves provided with triacs‐based reclosing in distribution networks | |
| Qianqian et al. | A new smart distribution grid fault self-healing system based on traveling-wave | |
| CN106841916B (en) | Distribution automation system earth fault positioning method based on traveling wave measure and transient zero-mode reactive power direction | |
| CN101435850A (en) | Balance type circuit of pulse current method for measuring three-phase electric power apparatus local discharge | |
| Mourad | An enhanced distance protection algorithm based on characteristics-travelling waves measured from the current for HVDC Lines | |
| Javaid et al. | High pass filter based traveling wave method for fault location in VSC-Interfaced HVDC system | |
| Dong et al. | Optimizing solution of fault location using single terminal quantities | |
| ES2380254A1 (en) | Device and method for localising faults in electrical distribution lines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |