CN106646142A - Grounding grid broken point diagnosis method and transient electromagnetic detection device - Google Patents
Grounding grid broken point diagnosis method and transient electromagnetic detection device Download PDFInfo
- Publication number
- CN106646142A CN106646142A CN201710129263.6A CN201710129263A CN106646142A CN 106646142 A CN106646142 A CN 106646142A CN 201710129263 A CN201710129263 A CN 201710129263A CN 106646142 A CN106646142 A CN 106646142A
- Authority
- CN
- China
- Prior art keywords
- grounded screen
- magnetic field
- detection device
- measuring point
- transient electromagnetic
- 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 invention discloses a grounding grid broken point diagnosis method and a transient electromagnetic detection device. The method comprises the following steps: setting a testing survey line above a grounding grid to be diagnosed; establishing a plurality of measurement point coordinates along the testing survey line; carrying out point-to-point measurement by the transient electromagnetic detection device along the measurement point coordinates of the testing survey line, so as to obtain induced voltage data of the measurement point coordinates; calculating according to the induced voltage data to obtain a magnetic field intensity value along the vertical direction and establishing a three-dimensional magnetic field intensity contour map of a testing region; and analyzing the three-dimensional magnetic field intensity contour map and judging whether the grounding grid has broken points or not. The diagnosis method disclosed by the invention does not depend on a grounding grid design construction drawing and a transformer substation does not need to be powered off; and grounding grid broken point diagnosis can be realized without excavation and power outage and the economic loss of a diagnosis process is reduced.
Description
Technical field
The present invention relates to power system grounded screen breaking point diagnosis technical field, more particularly to a kind of grounded screen breaking point diagnosis side
Method and transient electromagnetic detection device.
Background technology
The complete reliability of grounded screen is the necessary guarantee of safe operation of power system, and the conductor for constituting grounded screen is embedded in
Underground, often because of reasons such as failure welding during construction, solder skip or soil corrosions, causes conductor break, causes Grounding to be let out
Stream hydraulic performance decline, not only threatens equipment and personal safety, can also bring huge economic loss and social influence, but grounded screen to belong to
In underground concealed engineering, after the completion of civil engineering stage backfill operation, the connection situation to grounded screen and fortune are difficult to
The corrosion situation of grounding body is intuitively checked and state evaluation after row, therefore, research Fault Diagnosis for Grounding Grids technology is particularly
It is important.
In this year, in grounded screen breaking point diagnosis field, many scholars regard grounded screen as resistive network, by grounding lead
Judging whether breakpoint, the deficiency of the method is that to there is local disconnected when grounded screen for the measurement of line resistance or surface potential difference
During point, ground connection electrode resistance and surface potential are varied less, and difference is obvious, not directly perceived.Also external F.Dawalibi grinds
Study carefully the grounded screen frequency-domain analysis method that group is set up from the angle of Theory of Electromagnetic Field, using grounded screen can and end points note in grounded screen
Enter the sinusoidal current of certain frequency, by the measurement to Near Ground magnetic field, explore and grounded screen structural failure is examined
Disconnected electromagnetic method, but only reside within theory analysis.Domestic scholars Zhang Bo, Cui Xiang are in 2002 just according to moment method proposition
A kind of new harmonic current harmonic analysis method, by measuring surface potential difference cloth Fault Diagnosis for Grounding Grids is carried out.Then
Liu Yang, Cui Xiang etc. make further research, and by two guide bodies of grounded screen the sinusoidal excitation current of alien frequencies, measurement ground are injected
The distribution characteristics of table magnetic induction intensity, and corresponding current source and magnetic field detection circuit are devised, also there is proposition to Injection Current
Afterwards grounded screen top magnetic-field measurement data be filtered and numerical value differential process, but these methods also depend on can and breakpoint
Position and number, if can and breakpoint seldom, be difficult to obtain preferable diagnostic result.
Current Fault Diagnosis for Grounding Grids technology is based on Circuit theory, field road method, nondestructive determination and electrochemical process, but this
A little methods or ground grid design construction drawing is depended on, or require that transformer station has a power failure, affect Operation of Electric Systems.
The content of the invention
The invention provides a kind of grounded screen breaking point diagnosis method and transient electromagnetic detection device, are deposited with solving prior art
Depend on ground grid design data, or require that transformer station has a power failure, affect the problem of Operation of Electric Systems.
In a first aspect, the invention provides a kind of grounded screen breaking point diagnosis method, described based on transient electromagnetic detection device
Method includes：
Turnkey shoot line is set in the top of follow-up disconnecting earth mat, along the turnkey shoot line multiple measuring point coordinates are set up；
The transient electromagnetic detection device carries out point-to-point measurement along the measuring point coordinate of the turnkey shoot line, obtains the survey
Induced voltage data at point coordinates；
Vertical direction field strength values are calculated according to the induced voltage data, the three-dimensional magnetic field of test zone is set up
Intensity isogram；
The three-dimensional magnetic field intensity isogram is analyzed, judges that the grounded screen whether there is breakpoint.
Alternatively, the transient electromagnetic detection device carries out point-to-point measurement along the measuring point coordinate of the turnkey shoot line, obtains
The induced voltage data at the measuring point coordinate are obtained, is specifically included：
The center of the transient electromagnetic detection device is overlapped respectively with the measuring point coordinate of the turnkey shoot line；
The transient electromagnetic detection device produces bipolarity squared-pulse current, sets up pulsatile once magnetic field, and excitation connects
Earth mat produces secondary vortex flow field signal；
Sense the secondary vortex flow field signal, obtain the induced voltage data at each described measuring point coordinate.
Alternatively, it is described to be calculated vertical direction field strength values according to the induced voltage data, set up test section
The three-dimensional magnetic field intensity isogram in domain, specifically includes：
Vertical direction field strength values are obtained to the induced voltage data integration at the measuring point coordinate；
The vertical direction field strength values of each measuring point in the test zone are depicted as into Three-Dimensional Magnetic field intensity isopleth
Figure.
Alternatively, the analysis three-dimensional magnetic field intensity isogram, judges the grounded screen with the presence or absence of breakpoint, tool
Body includes：
Position and the trend of grounded screen band steel are obtained according to the three-dimensional magnetic field intensity isogram；
Analyze the difference of the field strength values around field strength values at the grounded screen band steel and the grounded screen band steel
Different situation；
Judge that the grounded screen whether there is breakpoint according to the difference condition of the field strength values.
Second aspect, present invention also offers a kind of transient electromagnetic detection device, described device is including emitting module and connects
Component is received, wherein：
The emitting module includes battery pack, emitter and transmit coil, the positive pole of the battery pack and the emitter
The connection of power supply anode, the negative pole of the battery pack is connected with the power supply negative terminal of the emitter；The transmit coil with it is described
The current output terminal connection of emitter；
The receiving unit includes receiving coil and receiver, and the receiving coil connects with the signals collecting line of receiver
Connect；The receiving coil is connected with transmitting coil signal.
Alternatively, the transmit coil and receiving coil are set to Genter loop device.
The technical scheme that the present invention is provided can include following beneficial effect：
The present invention provides a kind of grounded screen breaking point diagnosis method and transient electromagnetic detection device, and the method includes：In follow-up
The top of disconnecting earth mat arranges turnkey shoot line, and along turnkey shoot line multiple measuring point coordinates are set up；Transient electromagnetic detection device is along examination
The measuring point coordinate of test line carries out point-to-point measurement, obtains the induced voltage data at measuring point coordinate；According to induced voltage data meter
Calculation obtains vertical direction field strength values, sets up the three-dimensional magnetic field intensity isogram of test zone；Analyzing three-dimensional magnetic field intensity
Isogram, judges that grounded screen whether there is breakpoint.The diagnostic method does not rely on ground grid design construction drawing, does not require to become
Power station has a power failure, and can realize no-dig technique and the grounded screen breaking point diagnosis not having a power failure, and reduces the economic loss of diagnosis process.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
The present invention can be limited.
Description of the drawings
In order to be illustrated more clearly that technical scheme, letter will be made to the accompanying drawing to be used needed for embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of schematic flow sheet of grounded screen breaking point diagnosis method provided in an embodiment of the present invention；
Fig. 2 is the detailed process schematic diagram of S200 in a kind of grounded screen breaking point diagnosis method provided in an embodiment of the present invention；
Fig. 3 is the detailed process schematic diagram of S400 in a kind of grounded screen breaking point diagnosis method provided in an embodiment of the present invention；
Fig. 4 is that web frame and breakpoint and point position figure are grounded in emulation experiment provided in an embodiment of the present invention；
Fig. 5 is the vertical magnetic field three-dimensional isogram of grounded screen emulation experiment provided in an embodiment of the present invention；
Fig. 6 is the vertical magnetic field plane equivalence of grounded screen emulation experiment provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of transient electromagnetic detection device provided in an embodiment of the present invention.
Specific embodiment
Transient electromagnetic method is a kind of geophysical method, and it sets up pulsatile once magnetic field by transmit coil in underground,
Primary field tempus intercalare, forms underground vortex field, and downwards, to external diffusion, claim " smoke ring effect ", observe two using receiving coil
Secondary vortex field, and formation resistivity genesis analysis are inferred in Jing invertings, can form longitudinal resistivity sectional drawing.Visit with other resistivity
Survey method ratio, transient electromagnetic method has the features such as penetration capacity is strong, high resolution, bulk effect affect little and noncontacting measurement,
It is expected to detect a difficult problem comprehensively and new approaches are provided to solve online Fault Diagnosis for Grounding Grids, lossless no-dig technique and earth mat information.
It is the schematic flow sheet of grounded screen breaking point diagnosis method provided in an embodiment of the present invention referring to Fig. 1.
Grounded screen breaking point diagnosis method provided in an embodiment of the present invention includes：
S100：Turnkey shoot line is set in the top of follow-up disconnecting earth mat, along the turnkey shoot line multiple measuring point coordinates are set up.
Specifically, the upper area in follow-up disconnecting earth mat sets turnkey shoot line, including length and the test of turnkey shoot line
The distance between survey line, along the measurement direction of turnkey shoot line multiple measuring points are set up, and set measuring point spacing.Setting 3 is parallel to each other
Experiment survey line, three turnkey shoot lines test the decile of survey line 7 (every section of 14.29cm) setting measuring point position two-by-two at a distance of 0.5m, per bar
Put, conveniently detect whether the grounded screen band steel at the point position occurs breakpoint.
S200：The transient electromagnetic detection device carries out point-to-point measurement along the measuring point coordinate of the turnkey shoot line, obtains
Induced voltage data at the measuring point coordinate.
Specifically, along the measurement direction of the turnkey shoot line, point-to-point measurement is carried out using transient electromagnetic detection device, specifically
Step is as shown in Figure 2：
S201：The center of the transient electromagnetic detection device is overlapped respectively with the measuring point coordinate of the turnkey shoot line.
S202：The transient electromagnetic detection device produces bipolarity squared-pulse current, sets up pulsatile once magnetic field, and swashs
Encourage grounded screen and produce secondary vortex flow field signal.
S203：Sense the secondary vortex flow field signal, obtain the induced voltage data at each described measuring point coordinate.
Specifically, the center of transmitting coil overlaps with measuring point coordinate in transient electromagnetic detection device, then transient electrical magnetic spy
Survey device and produce bipolarity squared-pulse current, set up pulsatile once magnetic field, and encourage grounded screen to produce secondary vortex flow field signal,
Receiving coil observation sensing secondary turbulence field in transient electromagnetic detection device, measurement obtains the induced voltage at the measuring point coordinate
Data, store the induced voltage data at the measuring point coordinate, continue to measure next measuring point coordinate afterwards.
S300：Vertical direction magnetic field intensity is calculated according to the induced voltage data, the three-dimensional of test zone is set up
Magnetic field intensity isogram.
Specifically, in transient electromagnetic detection device, what existing most of instruments were adopted is all induction coil used as connecing
Sensing device is received, the induced voltage response of search coverage can only be measured, that is, magnetic field rate over time.According to farad
The law of electromagnetic induction, to induced voltage response integration vertical magnetic field strength value is obtained.
The parameter of transient electromagnetic device includes emission current I0, transmitting loop radius a, emitter turn-off time t0, receive line
The capture area S of circle, sample frequency f of receiverrate.The transient electromagnetic detection device that parameter is fixed, receiving coil
Measurement is induced voltage response data Vz(t), that is, vertical magnetic field Hz(t) rate over timeAccording to method
The law of electromagnetic induction is drawn to have：
Wherein, n --- coil turn；
μ0--- air permeability.
Formula (1) equal sign both sides are integrated, is arranged：
Wherein, ta--- earliest sample time；
tb--- last sample time.
When upper limit of integral is time variable t, can obtain again：
When lower limit of integral is time variable t, can obtain again：
The vertical magnetic field of inductive voltage value conversion can be obtained according to formula (3) and formula (4).Vertical magnetic field is calculated by formula (3), is asked
T is worked as in taking-upaValue H at → 0 momentz(t)；Vertical magnetic field is calculated by formula (4), when the time, t was larger,Go to zero, Hz(t)
Also tend to zero.Therefore t is worked asbWhen larger, formula (4) is then changed into：
Formula (5) is write as numerical computations form：
Inductive voltage value integration at each measuring point coordinate that measurement is obtained obtains vertical direction field strength values, utilizes
Unit magnetic strengths isogram is depicted as into figure work.
S400：The three-dimensional magnetic field intensity isogram is analyzed, judges that the grounded screen whether there is breakpoint.
Specifically, grounded screen breakpoint judgement is carried out by the field value isopleth difference condition on the value figure of analyzing three-dimensional field, is hung down
When the size of field value is located at point position depending on transient electromagnetic detection device at each measuring point on straight magnetic field intensity graphics, downwards
The vortex situation that the electromagnetic signal of propagation is produced with the coupling of grounded screen grid.
As shown in figure 3, to judge detailed step of the grounded screen with the presence or absence of breakpoint.
S401：Position and the trend of grounded screen band steel are obtained according to the three-dimensional magnetic field intensity isogram.
Specifically, intensity isogram in three-dimensional magnetic field shows network structure, and right with obvious with grounded screen model structure
Should, therefore position and the trend of grounded screen band steel can be shown.The netted thick line of black represents grounded screen band steel position on graphics
Put, figure orbicular spot is labeled as the point position above grounded screen band steel.Grounding flat steel belongs to the material of ground connection, and ground connection main line belongs to
The circuit of ground connection, grounding flat steel is used to make grounded screen, and ground connection main line is also one of grounding flat steel, is responsible for connection grounded screen,
Grounded screen extends to the metal shell of all electrical equipments in electric substation ground, and grounded screen links together.Grounded screen fault is most
Big harm is band steel fracture, therefore differentiates position and the trend of grounded screen band steel first, then judges that grounded screen band steel is again
No generation breakpoint and breakpoint location.
S402：Analyze the field strength values around field strength values at the grounded screen band steel and the grounded screen band steel
Difference condition.
S403：Judge that the grounded screen whether there is breakpoint according to the difference condition of the field strength values.
Specifically, field strength values and ungrounded net band steel at grounded screen band steel are contrasted in the intensity isogram of three-dimensional magnetic field
The difference of place's field strength values.Field value at grounded screen band steel is significantly smaller compared with the field value around band steel, when grounded screen band steel
There is large stretch of low-lying sign in place, and the field value at this is worth size much smaller than surrounding field, then show that the grounded screen band steel at this occurs
Breakpoint, positions the coordinate information of the point, realizes that accurate excavation is keeped in repair.
Emulation experiment is verified
Grounded screen breakpoint emulation experiment model is set up on the spot, transient electromagnetic transmitted waveform excitation is given：Emission current 1A,
Transmitting coil radius be 1.25m, receiving coil radius 0.25m, turn-off time 250us, sample frequency 100MHz.Using a side
The big square homogeneous half space of long 100m, arranges average soil resistivity ρ=50.27 Ω m, and grounded screen is in soil model
Upper surface once 0.8m, the specification for being grounded pessimistic concurrency control is：Number of grid 5 × 5, sizing grid 6m × 6m, breakpoint setup position is such as
Shown in Fig. 4.
Randomly choose the investigative range by breakpoint location, setting survey line and measuring point spacing；Emulation experiment terminates, and record is surveyed
Point location sensitive voltage data, the theoretical formula for changing vertical direction magnetic field intensity using above-mentioned induced voltage obtains each measuring point
Vertical direction magnetic field strength date；Using into figure instrument drawing three-dimensional magnetic field intensity isogram, as shown in Figure 5, Figure 6.
Fig. 5 is the three-dimensional isogram of vertical magnetic field strength, and Fig. 6 is the plane equivalence of magnetic field intensity, wherein, black
Netted thick line represent grounded screen band steel position, round dot represents the point position directly over grounded screen band steel, is tested to contrast
It is other with the field value difference at non-band steel at card band steel, it can be seen that the field value at band steel is low-lying obvious compared with around band steel in figure, disconnected
Clearly occur field value at large stretch of low-lying sign, and breakpoint at point and be worth size much smaller than surrounding field.
The magnetic field intensity isogram of contrast Fig. 4 grounded screens structural model and Fig. 5, Fig. 6 can be clearly seen horizontal and vertical
To band steel position and trend；By contrast two groups of figure coordinate (0, -3) positions at field Distribution value, can be clearly seen breakpoint and
The difference of non-breakpoint, thus can accurately judge the position distribution of breakpoint.
This time l-G simulation test, directly over band steel, the measuring point marker spacing in X-direction is 1m, the measuring point in Y direction
Marker spacing is 2m, and Y direction is sparse compared with X-axis measuring point, therefore shows in figure and characterized not as horizontal band steel table between longitudinal band steel measuring point
Levy continuity obvious.
The grounded screen breaking point diagnosis method that the present invention is provided is by grounded screen test zone planning experiments survey line and measuring point
Position, the center of receiving coil in transient electromagnetic detection device is overlapped with measuring point coordinate, reception device along turnkey shoot line by
Point is measured, and obtains the induced voltage data at measuring point coordinate；Using calculation of lightning induced voltage vertical direction field strength values, profit
With into figure instrument drawing three-dimensional magnetic field intensity isogram；Analyzing three-dimensional magnetic field intensity isogram, judges that grounded screen is with this
No generation breakpoint.The method can be clearly apparent grounded screen band steel position and trend on the intensity isogram of three-dimensional magnetic field and connect
The size of earth mat grid.If grounded screen band steel has breakpoint, the three-dimensional isogram of induced field is apparent at grounded screen breakpoint
Low-lying shape is shown, the foundation that can be judged directly as grounded screen breakpoint.The method is applied to the breakpoint of power system grounded screen
Diagnostic field, does not rely on ground grid design data, and can realize no-dig technique and the grounded screen breaking point diagnosis not having a power failure, and reduces
The economic loss of diagnosis process.
Referring to Fig. 7, the basic structure of the transient electromagnetic detection device provided for the present invention.
The transient electromagnetic detection device that the present invention is provided includes emitting module and receiving unit, wherein：
Emitting module includes battery pack 1, emitter 2 and transmit coil 3, and the positive pole of battery pack 1 is with the power supply of emitter 2 just
End connection, the negative pole of battery pack 1 is connected with the power supply negative terminal of emitter 2；Transmit coil 3 connects with the current output terminal of emitter 2
Connect.Battery pack 1 is powered for emitter 2, and emitter 2 produces bipolarity squared-pulse current, and by transmit coil 3 arteries and veins is set up
Rush magnetic field.
Receiving unit includes receiving coil 4 and receiver 5, and receiving coil 4 is connected with the signals collecting line of receiver 5.Connect
Take-up circle 4 is communicated to connect with transmit coil 3, and transmit coil 3 is used to set up pulsatile once magnetic field, and encourages earth mat to produce secondary vortices
Flow field signal, and receiving coil 4 is used for observation sensing secondary turbulence field, and it is stored in receiver 5 in induced voltage signal form
In.Receiver 5 carries out imaging analysis according to the Electromagnetic Launching ripple for receiving, and obtains a result.
Further, wire-retracting device centered on transmit coil 3 and receiving coil 4, transmit coil 3 and receiving coil 4 can set
The integrated coil of concentric circles is set to, and transmit coil 3 is not connected with receiving coil 4.When using, Genter loop device is along examination
Test line is measured, and every time the center of Genter loop device overlaps with measuring point during measurement.Optionally, the radius of transmitting coil 3
For 1.25m, the radius of receiving coil 4 is 0.25m.
Receiving unit also includes computer (mark), and computer reads the induced voltage data in receiver 5, and by induced electricity
Pressure data are converted to vertical direction field strength values, and figure instrument is utilized into afterwards by the vertical direction magnetic field intensity at each measuring point
Value is depicted as three-dimensional magnetic field intensity isogram, facilitates technical staff to judge that grounded screen is by three-dimensional magnetic field intensity isogram
No generation breakpoint.
During test, 3 turnkey shoot lines parallel to each other are set, survey line 1 is extended centrally out positioned at receiving coil 4, survey line 2
Stretch out positioned at the edge of receiving coil 4, survey line 3 is located at the outside 10cm of transmitting coil 3 and stretches out.Three two-phases of survey line two
Away from 0.5m, using 7 deciles (every section of 14.29cm), for judging breakpoint location according to three dimensional field value figure.Concrete grammar is to measure
Go out three dimensional field value figure, it is found that number lattice judge particular location after breakpoint, each lattice are 14.29cm, be can determine whether near 14.29cm,
Then maintenance is excavated, cost of labor is minimized.
The transient electromagnetic detection device that the present invention is provided is by 3 turnkey shoot lines, emitting module, receiving unit and computer group
Into emitting module includes battery pack, emitter and transmit coil, and the positive pole of battery pack is connected with the power supply anode of emitter, electricity
The negative pole of pond group is connected with the power supply negative terminal of emitter, and battery pack is powered for emitter.Transmit coil is defeated with the electric current of emitter
Go out end connection, emitter produces bipolarity squared-pulse current, by transmit coil pulsatile once magnetic field is set up.Receiving unit bag
Receiving coil and receiver are included, receiving coil is connected with the signals collecting line of receiver, and receiving coil and transmitting coil signal
Connection, for receiving the secondary vortex flow field signal of earth mat generation, and secondary turbulence field signal data is transmitted to receiver, is used for
Data processing, analysis.
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice disclosure of the invention here
Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
Invention described above embodiment does not constitute limiting the scope of the present invention.
Claims (6)
1. a kind of grounded screen breaking point diagnosis method, based on transient electromagnetic detection device, it is characterised in that methods described includes：
Turnkey shoot line is set in the top of follow-up disconnecting earth mat, along the turnkey shoot line multiple measuring point coordinates are set up；
The transient electromagnetic detection device carries out point-to-point measurement along the measuring point coordinate of the turnkey shoot line, obtains the measuring point and sits
Induced voltage data at mark；
Vertical direction field strength values are calculated according to the induced voltage data, the three-dimensional magnetic field intensity of test zone is set up
Isogram；
The three-dimensional magnetic field intensity isogram is analyzed, judges that the grounded screen whether there is breakpoint.
2. method according to claim 1, it is characterised in that the transient electromagnetic detection device is along the turnkey shoot line
Measuring point coordinate carry out point-to-point measurement, obtain the induced voltage data at the measuring point coordinate, specifically include：
The center of the transient electromagnetic detection device is overlapped respectively with the measuring point coordinate of the turnkey shoot line；
The transient electromagnetic detection device produces bipolarity squared-pulse current, sets up pulsatile once magnetic field, and encourages grounded screen
Produce secondary vortex flow field signal；
Sense the secondary vortex flow field signal, obtain the induced voltage data at each described measuring point coordinate.
3. method according to claim 1, it is characterised in that described to be calculated vertically according to the induced voltage data
Direction field strength values, set up the three-dimensional magnetic field intensity isogram of test zone, specifically include：
Vertical direction field strength values are obtained to the induced voltage data integration at the measuring point coordinate；
The vertical direction field strength values of each measuring point in the test zone are depicted as into three-dimensional magnetic field intensity isogram.
4. method according to claim 1, it is characterised in that the analysis three-dimensional magnetic field intensity isogram, sentences
The grounded screen of breaking whether there is breakpoint, specifically include：
Position and the trend of grounded screen band steel are obtained according to the three-dimensional magnetic field intensity isogram；
Analyze the difference feelings of the field strength values around field strength values at the grounded screen band steel and the grounded screen band steel
Condition；
Judge that the grounded screen whether there is breakpoint according to the difference condition of the field strength values.
5. a kind of transient electromagnetic detection device, it is characterised in that described device includes emitting module and receiving unit, wherein：
The emitting module includes battery pack, emitter and transmit coil, the confession of the positive pole of the battery pack and the emitter
Electric anode connection, the negative pole of the battery pack is connected with the power supply negative terminal of the emitter；The transmit coil and the transmitting
The current output terminal connection of machine；
The receiving unit includes receiving coil and receiver, and the receiving coil is connected with the signals collecting line of receiver；Institute
State receiving coil to be connected with transmitting coil signal.
6. device according to claim 5, it is characterised in that the transmit coil and receiving coil are set to Genter loop
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710129263.6A CN106646142B (en) | 2017-03-06 | 2017-03-06 | Grounding grid breakpoint diagnosis method and transient electromagnetic detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710129263.6A CN106646142B (en) | 2017-03-06 | 2017-03-06 | Grounding grid breakpoint diagnosis method and transient electromagnetic detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106646142A true CN106646142A (en) | 2017-05-10 |
| CN106646142B CN106646142B (en) | 2023-06-09 |
Family
ID=58848118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710129263.6A Active CN106646142B (en) | 2017-03-06 | 2017-03-06 | Grounding grid breakpoint diagnosis method and transient electromagnetic detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106646142B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015105A (en) * | 2017-05-28 | 2017-08-04 | 西南交通大学 | It is a kind of to detect vertical grounding electrode or the device and method of deep-well grounding validity |
| CN108398722A (en) * | 2018-02-05 | 2018-08-14 | 国网河南省电力公司电力科学研究院 | A kind of grounding net of transformer substation topological structure method for drafting based on the magnetic field differential method |
| CN109061379A (en) * | 2018-06-01 | 2018-12-21 | 吉林大学 | Grounded screen topological structure and breakpoint recognition methods based on the induced voltage differential method |
| CN110174593A (en) * | 2019-06-21 | 2019-08-27 | 三峡大学 | The apparatus and method of grounded screen breakpoint location are judged using electromagnetic induction |
| CN111289841A (en) * | 2020-03-23 | 2020-06-16 | 云南电网有限责任公司电力科学研究院 | Method and system for detecting and positioning corrosion of grounding grid |
| CN111880114A (en) * | 2020-07-31 | 2020-11-03 | 国网重庆市电力公司电力科学研究院 | Method and system for detecting breakpoint of grounding body of power transmission tower |
| CN112363019A (en) * | 2020-11-06 | 2021-02-12 | 云南电网有限责任公司电力科学研究院 | Grounding grid topological structure fault detection method and device |
| CN112503399A (en) * | 2020-12-01 | 2021-03-16 | 广州市城市规划勘测设计研究院 | Method and device for determining underground pipeline position and storage medium thereof |
| CN112540411A (en) * | 2020-11-06 | 2021-03-23 | 云南电网有限责任公司电力科学研究院 | Grounding grid topology positioning device and method |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0048250A1 (en) * | 1980-03-25 | 1982-03-31 | Mta Központi Fizikai Kutato Intezete | Propagation-expander-detector circuit for a magnetic bubble memory |
| US4956737A (en) * | 1989-04-04 | 1990-09-11 | Eastman Kodak Company | Magnetic head contour utilizing facets for air film skiving |
| US20010036084A1 (en) * | 2000-03-21 | 2001-11-01 | Alps Electric Co., Ltd. | Low-loss magnetic powder core, and switching power supply, active filter, filter, and amplifying device using the same |
| JP2004073894A (en) * | 1997-03-07 | 2004-03-11 | Hitachi Ltd | Calculating method for isofield contour map of biomagnetic field |
| CN201081764Y (en) * | 2007-12-28 | 2008-07-02 | 重庆市防雷中心 | Remote soil resistivity monitor |
| CN101216523A (en) * | 2007-12-28 | 2008-07-09 | 华北电力大学 | Substation grounding net defect diagnostic method and apparatus |
| CN101281255A (en) * | 2008-06-04 | 2008-10-08 | 河北煤炭科学研究所 | Method for detecting down-hole instant changeable electromagnetic ultralong distance |
| CN102628903A (en) * | 2012-04-19 | 2012-08-08 | 河北省电力公司超高压输变电分公司 | Method for detecting conductor position and grid structure of transformer station grounding network |
| CN202903922U (en) * | 2012-10-26 | 2013-04-24 | 湖州电力局 | Corrosion fault point diagnosis system for substation grounding grids |
| CN103792461A (en) * | 2013-11-21 | 2014-05-14 | 国家电网公司 | Grounding grid breakpoint diagnostic method for transient electromagnetic method |
| US20140239955A1 (en) * | 2013-02-27 | 2014-08-28 | Willowstick Technologies, Llc | System for detecting a location of a subsurface channel |
| CN203858320U (en) * | 2014-06-09 | 2014-10-01 | 国家电网公司 | Grounding grid corrosion and breakpoint detection system based on threshold value comparison |
| CN204179745U (en) * | 2014-11-29 | 2015-02-25 | 国家电网公司 | A kind of distribution line on-line monitoring communication terminal supporting high-tension line power taking |
| CN104375056A (en) * | 2014-10-31 | 2015-02-25 | 国家电网公司 | Substation cable outgoing line fault monitoring method based on voltage and current initial row waves |
| CN105137279A (en) * | 2015-07-16 | 2015-12-09 | 吉林大学 | Grounding grid breakpoint diagnostic method based on transient electromagnetic abnormal ring principle |
| CN105277993A (en) * | 2015-11-21 | 2016-01-27 | 山东省第一地质矿产勘查院 | Method for prospecting gold mine in sea area |
| CN105572748A (en) * | 2015-12-08 | 2016-05-11 | 中国科学院地质与地球物理研究所 | Transient electromagnetic detection time window determination method and device |
| CN106019386A (en) * | 2016-08-13 | 2016-10-12 | 中国科学院地质与地球物理研究所 | Method for measuring apparent resistivity through ratios in loop source |
| US20170023694A1 (en) * | 2015-07-23 | 2017-01-26 | Advanced Electromagnetic Technologies | Apparatus for airborne and ground electromagnetic prospecting and method thereof |
-
2017
- 2017-03-06 CN CN201710129263.6A patent/CN106646142B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0048250A1 (en) * | 1980-03-25 | 1982-03-31 | Mta Központi Fizikai Kutato Intezete | Propagation-expander-detector circuit for a magnetic bubble memory |
| US4956737A (en) * | 1989-04-04 | 1990-09-11 | Eastman Kodak Company | Magnetic head contour utilizing facets for air film skiving |
| JP2004073894A (en) * | 1997-03-07 | 2004-03-11 | Hitachi Ltd | Calculating method for isofield contour map of biomagnetic field |
| US20010036084A1 (en) * | 2000-03-21 | 2001-11-01 | Alps Electric Co., Ltd. | Low-loss magnetic powder core, and switching power supply, active filter, filter, and amplifying device using the same |
| CN201081764Y (en) * | 2007-12-28 | 2008-07-02 | 重庆市防雷中心 | Remote soil resistivity monitor |
| CN101216523A (en) * | 2007-12-28 | 2008-07-09 | 华北电力大学 | Substation grounding net defect diagnostic method and apparatus |
| CN101281255A (en) * | 2008-06-04 | 2008-10-08 | 河北煤炭科学研究所 | Method for detecting down-hole instant changeable electromagnetic ultralong distance |
| CN102628903A (en) * | 2012-04-19 | 2012-08-08 | 河北省电力公司超高压输变电分公司 | Method for detecting conductor position and grid structure of transformer station grounding network |
| CN202903922U (en) * | 2012-10-26 | 2013-04-24 | 湖州电力局 | Corrosion fault point diagnosis system for substation grounding grids |
| US20140239955A1 (en) * | 2013-02-27 | 2014-08-28 | Willowstick Technologies, Llc | System for detecting a location of a subsurface channel |
| CN103792461A (en) * | 2013-11-21 | 2014-05-14 | 国家电网公司 | Grounding grid breakpoint diagnostic method for transient electromagnetic method |
| CN203858320U (en) * | 2014-06-09 | 2014-10-01 | 国家电网公司 | Grounding grid corrosion and breakpoint detection system based on threshold value comparison |
| CN104375056A (en) * | 2014-10-31 | 2015-02-25 | 国家电网公司 | Substation cable outgoing line fault monitoring method based on voltage and current initial row waves |
| CN204179745U (en) * | 2014-11-29 | 2015-02-25 | 国家电网公司 | A kind of distribution line on-line monitoring communication terminal supporting high-tension line power taking |
| CN105137279A (en) * | 2015-07-16 | 2015-12-09 | 吉林大学 | Grounding grid breakpoint diagnostic method based on transient electromagnetic abnormal ring principle |
| US20170023694A1 (en) * | 2015-07-23 | 2017-01-26 | Advanced Electromagnetic Technologies | Apparatus for airborne and ground electromagnetic prospecting and method thereof |
| CN105277993A (en) * | 2015-11-21 | 2016-01-27 | 山东省第一地质矿产勘查院 | Method for prospecting gold mine in sea area |
| CN105572748A (en) * | 2015-12-08 | 2016-05-11 | 中国科学院地质与地球物理研究所 | Transient electromagnetic detection time window determination method and device |
| CN106019386A (en) * | 2016-08-13 | 2016-10-12 | 中国科学院地质与地球物理研究所 | Method for measuring apparent resistivity through ratios in loop source |
Non-Patent Citations (7)
| Title |
|---|
| BO ZHANG等: "Diagnosis of breaks in substation\'s grounding grid by using the electromagnetic method" * |
| CIGONG YU等: "Break-Point Diagnosis of Grounding Grids Using Transient Electromagnetic Apparent Resistivity Imaging" * |
| R. RASTGOUFARD 等: "Automatic determination of fault current breakpoint locations for personnel protective grounding of distribution and transmission lines" * |
| 刘洋;崔翔;卢铁兵;: "变电站接地网的断点诊断方法" * |
| 刘洋;崔翔;赵志斌;齐磊;陈建军;: "基于电磁感应原理的变电站接地网腐蚀诊断方法" * |
| 司文荣;王丰华;穆卡;刘亚东;: "应用磁感应强度诊断接地网故障的试验研究" * |
| 武建华;付炜平;: "基于电磁场分析法的变电站接地网状态诊断试验研究" * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015105A (en) * | 2017-05-28 | 2017-08-04 | 西南交通大学 | It is a kind of to detect vertical grounding electrode or the device and method of deep-well grounding validity |
| CN107015105B (en) * | 2017-05-28 | 2019-05-03 | 西南交通大学 | A kind of device and method detecting vertical grounding electrode or deep-well grounding validity |
| CN108398722A (en) * | 2018-02-05 | 2018-08-14 | 国网河南省电力公司电力科学研究院 | A kind of grounding net of transformer substation topological structure method for drafting based on the magnetic field differential method |
| CN109061379A (en) * | 2018-06-01 | 2018-12-21 | 吉林大学 | Grounded screen topological structure and breakpoint recognition methods based on the induced voltage differential method |
| CN110174593A (en) * | 2019-06-21 | 2019-08-27 | 三峡大学 | The apparatus and method of grounded screen breakpoint location are judged using electromagnetic induction |
| CN110174593B (en) * | 2019-06-21 | 2021-08-31 | 三峡大学 | Device and method for judging breakpoint position of grounding grid by adopting electromagnetic induction |
| CN111289841A (en) * | 2020-03-23 | 2020-06-16 | 云南电网有限责任公司电力科学研究院 | Method and system for detecting and positioning corrosion of grounding grid |
| CN111880114A (en) * | 2020-07-31 | 2020-11-03 | 国网重庆市电力公司电力科学研究院 | Method and system for detecting breakpoint of grounding body of power transmission tower |
| CN112363019A (en) * | 2020-11-06 | 2021-02-12 | 云南电网有限责任公司电力科学研究院 | Grounding grid topological structure fault detection method and device |
| CN112540411A (en) * | 2020-11-06 | 2021-03-23 | 云南电网有限责任公司电力科学研究院 | Grounding grid topology positioning device and method |
| CN112540411B (en) * | 2020-11-06 | 2024-02-06 | 云南电网有限责任公司电力科学研究院 | Topological positioning device and method for grounding grid |
| CN112503399A (en) * | 2020-12-01 | 2021-03-16 | 广州市城市规划勘测设计研究院 | Method and device for determining underground pipeline position and storage medium thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106646142B (en) | 2023-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106646142A (en) | Grounding grid broken point diagnosis method and transient electromagnetic detection device | |
| CN101216523B (en) | Substation grounding net defect diagnostic method and apparatus | |
| CN103792461B (en) | A kind of grounded screen breaking point diagnosis method of transient electromagnetic method | |
| CN105911603B (en) | Four-dimensional geophysical prospecting method based on natural electric field | |
| CN106597555A (en) | Grounding grid corrosion degree evaluation method based on transient electromagnetic method | |
| CN105158643A (en) | Remote control detecting device for corrosion state of grounding grid horizontal voltage-sharing conductor of substation | |
| CN102735992A (en) | Surface potential pilot frequency comparison-based ground grid defect identification method and system | |
| CN102262173A (en) | Method for measuring buried depth of buried pipeline, size and direction of stray current and geomagnetic azimuth angle | |
| CN106706715A (en) | Polluted soil detection method based on three-dimensional high-density electrical resistivity method | |
| CN102628903A (en) | Method for detecting conductor position and grid structure of transformer station grounding network | |
| CN206378448U (en) | Polluted Soil detection arrangement of measuring-line structure based on comprehensive geophysical prospecting methods | |
| CN105182183A (en) | Method for remotely detecting corrosion state of horizontal voltage equalizing conductor of transformer substation grounding grid | |
| CN106443189A (en) | Method and system for three-dimensional detection on earth electrode field and surrounding soil resistivity | |
| CN104035137A (en) | Underground full-space transient electromagnetic detecting instrument and detection method | |
| CN107271934A (en) | A kind of grounded screen security state evaluation device and method based on magnetic effect | |
| CN103869206A (en) | Grounding network state detection system for high-frequency pulse inverse scattering imaging | |
| CN104897995A (en) | Transformer station grounding network corrosion detecting system based on earth surface potential, and method thereof | |
| Zhang et al. | Study on corrosion fracture diagnosis method of grounding wire of tower grounding device | |
| CN206945884U (en) | A kind of transient electromagnetic detection device | |
| CN206833669U (en) | A kind of slope geological monitoring and warning system | |
| Liu et al. | A magnetic detecting and evaluation method of substation’s grounding grids with break and corrosion | |
| CN110174593B (en) | Device and method for judging breakpoint position of grounding grid by adopting electromagnetic induction | |
| CN202710673U (en) | Conductor position and grid structure detection system for transformer station grounding network | |
| CN109738759A (en) | A kind of earth mesh conductive state nondestructive detection system and method | |
| CN103941095B (en) | A kind of method that the resistivity of underground metallic conduit surrounding soil is tested |
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 |