CN107219423A - Lightning impulse response measurement system - Google Patents
Lightning impulse response measurement system Download PDFInfo
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- CN107219423A CN107219423A CN201710418289.2A CN201710418289A CN107219423A CN 107219423 A CN107219423 A CN 107219423A CN 201710418289 A CN201710418289 A CN 201710418289A CN 107219423 A CN107219423 A CN 107219423A
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- measured
- earthing
- shaft tower
- grounding means
- dash current
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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
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a kind of lightning impulse response measurement system.The system includes：Dash current generating loop device, the first measurement apparatus, the second measurement apparatus and diffusing device；Wherein, dash current generating loop device, shaft tower to be measured constitute a circuit loop line with the earth series winding；Or dash current generating loop device, earthing or grounding means to be measured constitute a circuit loop line with the earth series winding, dash current generating loop device produces dash current and exports dash current into shaft tower to be measured or earthing or grounding means to be measured；First measurement apparatus is electrically connected with shaft tower to be measured or earthing or grounding means to be measured, to measure the surge voltage at shaft tower to be measured or earthing or grounding means dash current decanting point to be measured；Second measurement apparatus measurement flows through the dash current of shaft tower to be measured or earthing or grounding means to be measured；Diffusing device forces the dash current through shaft tower to be measured or earthing or grounding means to be measured injection the earth in soil to the uniform diffusing of surrounding.The present invention realizes the field measurement for treating measuring staff tower or earthing or grounding means shock response to be measured.
Description
Technical field
The present invention relates to technical field of power systems, in particular to a kind of lightning impulse response measurement system.
Background technology
At present, thunderbolt is the main factor for jeopardizing transmission line safety reliability service.The 2005 of State Grid Corporation of China~
The statistics of running situation in 2010 shows, the line tripping number caused due to being struck by lightning the line is busy road always trips the 40.52% of number, the row of being higher by
One times or so of the line tripping number caused by external force is destroyed of the second reason of name.As China's extra-high voltage starts to step into quick hair
Exhibition period, the raising of voltage class and shaft tower height and the further expansion of power network scale, the more complication of electric network composition,
Thing followed Lightning Protection is more protruded, in the urgent need to carrying out in-depth study.
In the factors of influence line thunder protection performance, the main factor that can be designed improvement is transmission line of electricity bar
The impulse earthed resistance of tower.Tower Impulse Grounding Resistance is reduced, for improving line thunder protection performance, the safety and stability of circuit is ensured
Operation, tool is of great significance.
At present in the design and construction of engineering, mainly take extended ground conductor, increase in the case of high soil resistivity
Plus the measure such as ray radical.These measures can reduce the power frequency grounding resistance value of shaft tower, but whether reduce impulse earthed resistance value
It is unknown.The factor exactly impulse earthed resistance of actually real influence back flashover probability.Tower grounding body is hit
Electric current shows impulse earthed resistance in the influence of the earth diffusing behavioural characteristic, there is larger difference between stable state grounding resistance
It is different, it is up to standard which results in often occurring power frequency earthing resistance in Practical Project, but lightening hazard still frequently occurs for transmission line of electricity.
Therefore, correct line thunder protection analysis should allow for shaft tower and the actual impact characteristics of earthing or grounding means.Impact characteristics are advised
Rule and its effectively appraisal procedure are studied, and this has larger real value to safe operation of power system.
Electric power line pole tower and the actual impact characteristics research method of earthing or grounding means have two kinds of means of simulation calculation and experiment.
The complexity of the time-varying electric field produced during device aerial drainage grounded due to dash current, it is difficult to theoretically derive more accurate
Mathematic(al) representation, therefore can only go out to send announcement impact characteristics from the angle of experimental study at present.
Current research technique is mainly simulated test, i.e., carry out test measurement using to earthing or grounding means injection low current,
But it is difficult flashing electric discharge in soil during the grounded device aerial drainage of low current, with thunder amplification current spark stream in Practical Project
Discharge scenario through shaft tower and earthing or grounding means in soil is not inconsistent, and then causes measurement result inaccurate.
The content of the invention
In consideration of it, the present invention proposes a kind of lightning impulse response measurement system, it is intended to which solution uses simulated test at present
The problem of caused measurement result is inaccurate.
On one side, the present invention proposes a kind of lightning impulse response measurement system.The system includes：Dash current occurs
Loop apparatus, the first measurement apparatus, the second measurement apparatus and diffusing device；Wherein, dash current generating loop device, treat measuring staff
Tower connects and composes a circuit loop line with the earth electricity string；Or dash current generating loop device, earthing or grounding means to be measured are gone here and there with the earth electricity
Connect and compose a circuit loop line, dash current generating loop device is used to producing dash current, and dash current is exported to treating
In measuring staff tower or earthing or grounding means to be measured；First measurement apparatus is electrically connected with shaft tower to be measured or earthing or grounding means to be measured, is treated for measuring
Surge voltage at measuring staff tower or earthing or grounding means dash current decanting point to be measured；Second measurement apparatus flows through bar to be measured for measurement
The dash current of tower or earthing or grounding means to be measured；Diffusing device is used to force injects the earth through shaft tower to be measured or earthing or grounding means to be measured
Dash current is in soil to the uniform diffusing of surrounding.
Further, in above-mentioned lightning impulse response measurement system, dash current generating loop device includes：Dash current
Generator, TRT, isolation potential device and electric current pole；Wherein, TRT is by isolating potential device and dash current
Generator is electrically connected, for providing working power for impulse current generator；The earth terminal and output end of impulse current generator
Electrically connected respectively with electric current pole and shaft tower to be measured；Or the earth terminal and output end of impulse current generator are respectively with electric current pole and treating
Survey earthing or grounding means electrical connection, impulse current generator is used to produce dash current, and dash current exported to shaft tower to be measured or
Earthing or grounding means to be measured；Electric current pole is inserted in ground, for collecting the dash current in soil.
Further, in above-mentioned lightning impulse response measurement system, the first measurement apparatus includes：Divider, voltage pole and
First oscillograph；Wherein, voltage pole is inserted in ground, and is electrically connected with the earth terminal of divider, for providing zero for divider
Current potential；The input of divider is electrically connected with shaft tower to be measured or earthing or grounding means to be measured, for receiving shaft tower to be measured or ground connection to be measured
The surge voltage signal of device, and surge voltage signal is reduced to by the first default dividing ratios is available for the first oscillograph to allow
The voltage signal of reception, and exported the voltage signal to the first oscillograph by output end；The input of first oscillograph
Electrically connected with the output end of divider, the High Voltage Impulse Waveform for receiving and showing shaft tower to be measured or earthing or grounding means to be measured.
Further, in above-mentioned lightning impulse response measurement system, the second measurement apparatus includes：Coil and the second oscillography
Device；Wherein, coil is sheathed on the electric connection line of electric current pole and dash current device earth terminal, and keeps default electricity with electric connection line
Draw last breath edge, the dash current for measuring shaft tower to be measured or earthing or grounding means to be measured；The input of second oscillograph is electrically connected with coil
Connect, for receiving the dash current of shaft tower to be measured or earthing or grounding means to be measured and showing the waveform of the dash current.
Further, in above-mentioned lightning impulse response measurement system, the output end of impulse current generator and shaft tower to be measured
Electrical connection, and the dash current of generation is exported into shaft tower to be measured, shaft tower to be measured is electrically connected with earthing or grounding means to be measured；First surveys
Amount device is electrically connected with shaft tower to be measured, for measuring the impact electricity at shaft tower to be measured and earthing or grounding means dash current decanting point to be measured
Pressure；Second measurement apparatus is used for the dash current for measuring shaft tower to be measured and earthing or grounding means to be measured；Diffusing device is used to force through treating
The dash current of measuring staff tower and earthing or grounding means to be measured injection the earth is in soil to surrounding diffusing.
Further, in above-mentioned lightning impulse response measurement system, the input of divider is electrically connected with shaft tower to be measured, is used
In the surge voltage signal for receiving shaft tower to be measured and earthing or grounding means to be measured, and by second, default dividing ratios are by shaft tower to be measured or treat
The surge voltage signal of survey earthing or grounding means, which is reduced to, is available for the first oscillograph to allow the voltage signal received, and passes through output end
The voltage signal is exported to the first oscillograph；First oscillograph is used to receive and shows shaft tower to be measured and earthing or grounding means to be measured
High Voltage Impulse Waveform.
Further, in above-mentioned lightning impulse response measurement system, coil is used to measure shaft tower to be measured and ground connection to be measured dress
The dash current put, the second oscillograph is for receiving the dash current of shaft tower to be measured and earthing or grounding means to be measured and showing impact electricity
The waveform of stream.
Further, in above-mentioned lightning impulse response measurement system, diffusing device includes：Multiple return electrodes and copper ring；
Wherein, copper ring is located on around shaft tower to be measured, and the first end of each return electrode is connected with copper ring, and the second of each return electrode
End is inserted in ground.
Further, above-mentioned lightning impulse response measurement system, in addition to：First seal, impulse current generator,
The first seal is provided between TRT, isolation potential device and ground.
Further, above-mentioned lightning impulse response measurement system, in addition to：First electric supply installation, with the first measurement apparatus
Electrically connected with the second measurement apparatus, for being powered to the first measurement apparatus and the second measurement apparatus.
Further, in above-mentioned lightning impulse response measurement system, the first electric supply installation includes：First battery and first
Inverter；Wherein, the first battery is electrically connected with the input of the first inverter, the output end of the first inverter and the first measurement
Device and the second measurement apparatus are electrically connected.
Further, above-mentioned lightning impulse response measurement system, in addition to：Also include：Control device, for controlling impact
The charging process and discharge process of current feedback circuit.
Further, above-mentioned lightning impulse response measurement system, in addition to：Also include：Second electric supply installation, is filled with control
Electrical connection is put, for being powered to control device.
Further, in above-mentioned lightning impulse response measurement system, the second electric supply installation includes：Second battery and second
Inverter；Wherein, the second battery is electrically connected with the input of the second inverter, the output end and control device of the second inverter
Electrical connection.
Further, above-mentioned lightning impulse response measurement system, in addition to：Second seal, control device, first are surveyed
The second seal is provided between amount device and the second measurement apparatus and ground.
In the present invention, measuring staff tower is treated by dash current generating means or earthing or grounding means to be measured injects thousands of peaces or even number
The large impact electric current of ten kilo-amperes, wandering device forces the dash current through shaft tower to be measured or earthing or grounding means to be measured injection the earth in soil
It is uniform to surrounding diffusing in earth, truly to simulate diffusing situation of the lightning current in soil in nature so that measurement result is more
Plus it is accurate；First measurement apparatus measures the surge voltage of shaft tower to be measured or earthing or grounding means to be measured, and the measurement of the second measurement apparatus is to be measured
The dash current of shaft tower or earthing or grounding means to be measured, realizes the scene for treating measuring staff tower or earthing or grounding means to be measured progress shock response
Actual measurement, can examine drop resistance measure to treat the actual influence for surveying Tower Impulse Grounding Resistance.In addition, with reference to shaft tower power frequency electric to be measured
The measurement result of resistance, can analyze the impact coefficient for proposing shaft tower to be measured, to reduce the engineering of Tower Impulse Grounding Resistance to be measured
Design and construction provide reliable basis.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the structural representation of lightning impulse response measurement system provided in an embodiment of the present invention；
In the lightning impulse response measurement system that this hair of Fig. 2 inventive embodiments are provided, the High Voltage Impulse Waveform of shaft tower to be measured
Schematic diagram；
Fig. 3 be lightning impulse response measurement system provided in an embodiment of the present invention in, the surge voltage of earthing or grounding means to be measured
Waveform diagram；
Fig. 4 be lightning impulse response measurement system provided in an embodiment of the present invention in, the impulse current waveform of shaft tower to be measured
Schematic diagram；
Fig. 5 be lightning impulse response measurement system provided in an embodiment of the present invention in, the dash current of earthing or grounding means to be measured
Waveform diagram；
During Fig. 6 is lightning impulse response measurement system provided in an embodiment of the present invention, shaft tower to be measured and earthing or grounding means to be measured
Structural representation；
During Fig. 7 is lightning impulse response measurement system provided in an embodiment of the present invention, shaft tower to be measured and earthing or grounding means to be measured
High Voltage Impulse Waveform schematic diagram；
During Fig. 8 is lightning impulse response measurement system provided in an embodiment of the present invention, shaft tower to be measured and earthing or grounding means to be measured
Impulse current waveform schematic diagram.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to Fig. 1, the preferred structure for the lightning impulse response measurement system that the present embodiment is provided is shown in figure.As schemed
Show, the system includes：Dash current generating loop device 1, the first measurement apparatus 2, the second measurement apparatus 3 and diffusing device 4.
Wherein, dash current generating loop device 1, shaft tower 5 to be measured connect and compose a circuit loop line with the earth electricity string,
Or, dash current generating loop device 1, earthing or grounding means to be measured 6 connect and compose a circuit loop line with the earth electricity string.Dash current
Generating loop device 1 can produce dash current and export the dash current into shaft tower 5 to be measured or earthing or grounding means to be measured 6.
When it is implemented, dash current generating loop device 1 is can be portable., can be using container as base for ease of transport, will
Dash current generating loop device 1 is installed on container.The nominal voltage of dash current generating loop device 1 can for ±
1200kV, rated energy can be 360kJ, can analog output current waveform be 8 μ s/20 μ s lightning wave, when load resistance is
Exportable dash current maximum amplitude is 40kA during 30 Ω.First measurement apparatus 2 and shaft tower 5 to be measured or the electricity of earthing or grounding means to be measured 6
Connection, and then measure surge voltage, the second measurement apparatus 3 at the dash current decanting point of shaft tower 5 to be measured or earthing or grounding means to be measured 6
Measure the dash current of shaft tower 5 to be measured or earthing or grounding means to be measured 6.
Before measurement, first have to carry out the Field Research of electric power line pole tower measurement point, it is desirable to measurement point traffic convenience, carry
The lorry for having the measuring system container can go directly under shaft tower 5 to be measured, and shaft tower to be measured 5 is in opening, in order to the survey
The handling of amount system and arrangement.Secondly, it is necessary to the soil resistivity of field measurement measurement point, the grounding resistance of shaft tower 5 to be measured
(being not connected to earthing or grounding means 6 to be measured), shaft tower to be measured 5 connect total grounding resistance of earthing or grounding means 6 to be measured, earthing or grounding means to be measured 6
Grounding resistance.Again, the site layout project scheme of the measuring system is formulated, according to arrangement, crane respectively sends out dash current
The equipment such as raw loop apparatus 1, the first measurement apparatus 2, the second measurement apparatus 3 are placed in relevant position, and carry out diffusing device 4
Arrangement.After each equipment is connected, you can measure.
In the present embodiment, measuring staff tower 5 is treated by dash current generating means 1 or earthing or grounding means to be measured 6 injects thousands of peaces
The even large impact electric current of tens of kilo-amperes, wandering device forces the impact that the earth is injected through shaft tower 5 to be measured or earthing or grounding means to be measured 6
Electric current is uniform to surrounding diffusing in soil, truly to simulate diffusing situation of the lightning current in soil in nature so that survey
Measure result more accurate；First measurement apparatus 2 measures the surge voltage of shaft tower 5 to be measured or earthing or grounding means to be measured 6, the second measurement dress
The dash current of 3 measurements shaft tower 5 to be measured or earthing or grounding means to be measured 6 is put, realizes and treats measuring staff tower 5 or earthing or grounding means to be measured 6 enters
The field measurement of row shock response, can examine drop resistance measure to treat the actual influence of the impulse earthed resistance of measuring staff tower 5.In addition,
With reference to the measurement result of the industrial frequency electric resistance of shaft tower 5 to be measured, the impact coefficient for proposing shaft tower 5 to be measured can be analyzed, measuring staff is treated for reduction
The engineering design and construction of the impulse earthed resistance of tower 5 provides reliable basis.
In above-described embodiment, dash current generating loop device 1 can include：Impulse current generator 11, TRT
12nd, isolation potential device 13 and electric current pole 14.Wherein, the input 131 of isolation potential device 13 can be with the electricity of TRT 12
Connection, the output end 132 of isolation potential device 13 can be electrically connected with dash current generating means device 11, i.e., TRT 12 leads to
Isolation potential device 13 is crossed to electrically connect with dash current generating means device 11.Isolation potential device 13 can prevent dash current from trying
In testing, TRT 12 is arrived in the overvoltage counterattack being likely to occur on dash current generating means device 11.When it is implemented, isolation becomes
Pressure device 13 can be 1:1 isolation potential device 13.TRT 12 can provide work electricity for impulse current generator 11
Source.When the surge voltage and dash current for measuring shaft tower 5 to be measured, the earth terminal and high-voltage output end of impulse current generator 11
Respectively with electric current pole 14 and electrically connecting shaft tower 5 to be measured and electrically connecting；When the surge voltage and dash current that measure earthing or grounding means 6 to be measured
When, the earth terminal and high-voltage output end of impulse current generator 11 are respectively with electric current pole 14 and electrically connecting the electricity of earthing or grounding means 6 to be measured
Connection.Electric current pole 14 can be inserted in ground, to collect the dash current in soil.When it is implemented, impulse current generator
11 can be H-shaped combining structure, and bilateral symmetry charging, one-level can have two capacitors, on one side a capacitor.Main capacitor
Dry insulation structure, such as MWF100-3.6 types capacitor can be used.Each capacitor bank into the structure of capacitor tower module can
With optimization design, to control the weight of dash current generating means device 11.When it is implemented, in order to solve to impact electricity out of doors
The powerup issue of flow generating apparatus device 11, TRT 12 can be high-power diesel generator, through on-the-spot test, diesel generation
The power of machine at least should be 30KW.When it is implemented, dash current generating means device 11 can be made up of multistage, such as by 6 grades
Composition, be located below 3 grades of impulse current generator 11 can be placed in same container, impulse current generator 11
Located above 3 grades can be flexibly lifted on following 3 grades.All parts are all fixed in container, to ensure transport
Shi Buhui is shifted over.Isolation leg can be provided with container, so that container is maintained a certain distance with ground, such as
300mm distance is kept, and then avoids occurring flashover breakdown with ground.The charging device of impulse current generator 11 can be used
Charging can be adjusted using scr voltage regula-tor unit automatic constant current in bilateral symmetry formula charging modes, charging process.Charging is finished
Afterwards, ignition discharge momentary charge installation's power source is automatically shut down, so as to protect the safety of charging device and scr voltage regula-tor unit.
In above-described embodiment, the first measurement apparatus 2 can include：Divider 21, the oscillograph 23 of voltage pole 22 and first.Its
In, voltage pole 22 can be inserted in ground, and be electrically connected with the earth terminal of divider 21, and then provide zero electricity for divider 21
Position.The input 211 of divider 21 can be electrically connected with shaft tower 5 to be measured or earthing or grounding means to be measured 6, and the output end of divider 21
212 can be electrically connected with the first oscillograph 23, and divider 21 can receive the surge voltage of shaft tower 5 to be measured or earthing or grounding means to be measured 6
Signal, and by the first default dividing ratios the surge voltage signal of shaft tower 5 to be measured or earthing or grounding means to be measured 6 is reduced to and to be available for the
One oscillograph 23 allows the voltage signal received, is then again exported the voltage signal to the first oscillograph by output end 212
23.When it is implemented, divider 21 can be underdamping capacitive divider 21, nominal voltage can be ± 1000kV, intrinsic standoff ratio
Can be 1000/1.For ease of transport, divider 21 can be composed in series by two section MWF500-800 type impulse capacitors, be damped
Resistance uses multi-line distributed sensor, and capacitor can be noninductive structure, and low-voltage arm can be made up of noninductive ROHS and connecing.Partial pressure
Device 21 can be moveable structure, and top is equipped with grading shield.The square-wave response characteristic of underdamping capacitive divider 21 meets GB/
T 311.1 and GB/T 16927 standard requirement.The input 231 of first oscillograph 23 can be with divider 21 output end
212 by measuring cable connection, to receive and show the High Voltage Impulse Waveform of shaft tower 5 to be measured or earthing or grounding means to be measured 6, treats measuring staff
The High Voltage Impulse Waveform figure of tower 5 may refer to Fig. 2, and the High Voltage Impulse Waveform figure of earthing or grounding means 6 to be measured may refer to Fig. 3.
When it is implemented, the first oscillograph 23 can be imported from America TDS series digit oscillographs, the first oscillograph 23 is embedded with special
Survey Software bag, show, analyze with waveform, into figure and printing etc. function.First oscillograph 23 can be according to high-potting
It is accustomed to setting measurement parameter, each Wave data is calculated automatically, the computational methods used comply fully with GB/T16896.1-
The requirement of 1997 and IEC1083 standards.First oscillograph 23 uses isolation filter power supply and shielding construction, with very strong anti-dry
Ability is disturbed, being allowed in the environment of high voltage and high-intensity magnetic field can reliable, stabilization work.First oscillograph 23, which can be connected with, to be beaten
Print machine, to be printed in real time to the High Voltage Impulse Waveform of display, it should be noted that the printer needs insulation against ground.
It should be noted that the first default dividing ratios can determine that the present embodiment is not done to it according to actual needs
It is any to limit.
In the present embodiment, it can complete to treat measuring staff tower 5 or treat by divider 21, the oscillograph 23 of voltage pole 22 and first
The measurement of the surge voltage of earthing or grounding means 6 is surveyed, it is simple in construction, it is easy to accomplish.In addition, can be more straight by the first oscillograph 23
The waveform for the surge voltage for finding out shaft tower 5 to be measured or earthing or grounding means to be measured 6 seen.
In above-described embodiment, the second measurement apparatus 3 can include：The oscillograph 32 of coil 31 and second.Wherein, coil 31 can
Occur to be sheathed on electric current pole 14 with dash current on the electric connection line of dress device 11, and keep presetting electrically absolutely with electric connection line
Edge, to measure the dash current of shaft tower 5 to be measured or earthing or grounding means to be measured 6.When it is implemented, coil 31 can be Pearson
1330, scalable maximum current peak can be 100kA, and Hz-KHz can be 0.9Hz~1.5MHz.Second oscillograph 32
Input 321 can be with coil 31 by measuring cable connection, to receive the impact of shaft tower 5 to be measured or earthing or grounding means to be measured 6
Electric current and the waveform for showing the dash current, impulse current waveform figure of shaft tower 5 to be measured may refer to Fig. 4, ground connection dress to be measured
The impulse current waveform figure for putting 6 may refer to Fig. 5.When it is implemented, the second oscillograph 32 can be with the first oscillograph 23
Identical, the second oscillograph 32 can also be connected with printer, in real time to be printed the impulse current waveform of display, it is necessary to be noted
Meaning, the printer is also required to insulation against ground.Second oscillograph 32 and the first oscillograph 23 can also with calculating mechatronics,
Operational factor and measurement result can in real time be shown in digital quantity form on computer interface.
It should be noted that default electric insulation can determine that the present embodiment does not do any to it according to actual needs
Limit.
In the present embodiment, it can complete to treat measuring staff tower 5 or earthing or grounding means to be measured 6 by the oscillograph 32 of coil 31 and second
Dash current measurement, it is simple in construction, it is easy to accomplish.Treated in addition, can more intuitively be found out by the second oscillograph 32
The waveform of the dash current of measuring staff tower 5 or earthing or grounding means to be measured 6.
Referring to Fig. 6, it will be recognized by those skilled in the art that shaft tower to be measured 5 is generally electrically connected with earthing or grounding means 6 to be measured, will
Connecting line 8 between shaft tower 5 and earthing or grounding means to be measured 6 to be measured is removed, it is possible to realize that impulse current generator 11 is produced it
Individually output is exported to earthing or grounding means 6 to be measured raw dash current to shaft tower 5 to be measured or individually.When shaft tower 5 to be measured connects with to be measured
When ground device 6 is electrically connected, the dash current that impulse current generator 11 is produced is exported to shaft tower 5 to be measured, and then is exported to treating
In the earthing or grounding means to be measured 6 that measuring staff tower 5 is electrically connected, the first measurement apparatus 2 then measures shaft tower 5 to be measured and earthing or grounding means to be measured 6
Surge voltage, the second measurement apparatus 3 then measures the dash current of shaft tower 5 to be measured and earthing or grounding means to be measured 6.Diffusing device 4 then may be used
To force the dash current through shaft tower 5 to be measured and the injection the earth of earthing or grounding means to be measured 6 in soil uniformly to surrounding diffusing.
The input 211 of divider 21 is only electrically connected with shaft tower 5 to be measured, due to shaft tower 5 to be measured be electrically connected with it is to be measured
Earthing or grounding means 6, so divider 21 can receive the surge voltage signal of shaft tower 5 to be measured and earthing or grounding means to be measured 6, and by second
The surge voltage signal of shaft tower 5 to be measured and earthing or grounding means to be measured 6 is reduced to by default dividing ratios is available for the first oscillograph 23 to permit
Perhaps the voltage signal received, and exported the voltage signal to first oscillograph 23, the first oscillography by output end 212
Device 23 can receive and show the High Voltage Impulse Waveform of shaft tower 5 to be measured and earthing or grounding means to be measured 6, and the High Voltage Impulse Waveform figure can be with
Referring to Fig. 7.
Coil 32 can then measure the dash current of shaft tower 5 to be measured and earthing or grounding means to be measured 6, and the second oscillograph 33 can connect
Receive the dash current of shaft tower 5 to be measured and earthing or grounding means to be measured 6 and show the waveform of the dash current, the impulse current waveform figure can
With referring to Fig. 8.
In the present embodiment, when the connecting line 8 between shaft tower 5 to be measured and earthing or grounding means to be measured 6 is removed, it is possible to achieve individually
The surge voltage of measuring staff tower 5 or the measurement of dash current are treated, the surge voltage individually to earthing or grounding means 6 to be measured can also be realized
Or the measurement of dash current；When shaft tower 5 to be measured is electrically connected with earthing or grounding means 6 to be measured, it is possible to achieve treat measuring staff tower 5 and to be measured connect
The measurement of the surge voltage of ground device 6, can also realize the measurement for the dash current for treating measuring staff tower 5 and earthing or grounding means to be measured 6.
In above-described embodiment, it can also include：Multiple return electrodes 41 and copper ring 42.Wherein, copper ring 42 can be located on
In soil around shaft tower 5 to be measured, the first end (upper end shown in Fig. 1) of each return electrode 41 can be connected with copper ring 42
Connect, the second end (lower end shown in Fig. 1) of each return electrode 41 can be inserted in ground.Copper ring 42 and each return electrode 41 can
To force through the electric current in shaft tower 5 to be measured and/or the injection of earthing or grounding means to be measured 6 ground to the uniform diffusing of surrounding, so as to realize approximate
The actual lightning current of simulation is wandering in ground, more tallies with the actual situation.
In above-described embodiment, it can also include：First seal 7, impulse current generator 11, TRT 12, every
From can be provided with the first seal 7 between potential device 13 and ground, to avoid the high current for injecting ground through ground
Strike back impulse current generator 11, TRT 12 and upper isolation potential device 13.
In the various embodiments described above, it can also include：Control device (not shown), institute can be completed by control device
There are the parameters such as setting, operation, measurement, you can the DC charging voltage of setting dash current generating means device 11, charging interval, put
Electric ball monitors and measured its running status away from, triggering mode and the automatic changing-over of polarity etc..When it is implemented, control device can
To be electrically connected by optical fiber with the controller of impulse current generator 11.Control device can be touch-screen programmable controller
(PLC), programmed with industry control professional software, be designed so as to the control working interface of operation.Control device has following function：
1.) charging process of surge voltage generating means body can be automatically controlled, can be adjusted and charged according to test requirements document
Voltage and time；
2.) charging voltage automatic stabilisation is made on charging voltage value set in advance；
3.) can manually, automatic or alarm triggering dash current generating means device 11 lights a fire；
4.) have manually regulation ball away from or carry out function of the ball discharge gap from motion tracking；
5.) there is the functions such as charge protection, power phase protection, overcurrent and overvoltage automatic protection；
6.) there is the functions such as positive-negative polarity automatic conversion, automatic earthing；
7.) there is the alarm control interface of the trial zones such as perfect warning lamp, alarm bell.
Because the electric power that TRT 12 is produced only is powered to impulse current generator 11, and the first measurement can not be filled
Put the equipment and instruments such as the 2, second measurement apparatus 3 and control device to power, otherwise overvoltage anti-channeling can cause the damage of equipment and instrument,
Even threaten personal safety.So, in the various embodiments described above, it can also include：First electric supply installation (not shown) and
Two electric supply installation (not shown)s.First electric supply installation can be electrically connected with the first measurement apparatus 2 and the second measurement apparatus 3 respectively
Connect, to be powered to the first measurement apparatus 2 and the second measurement apparatus 3.Second measurement apparatus can be electrically connected with control device, with right
Control device is powered.When the printer is used, the first electric supply installation or the second electric supply installation can also power to printer.
In above-described embodiment, the first electric supply installation can include：First battery (not shown) and the first inverter
(not shown).Wherein, the first battery can be electrically connected with the input of the first inverter, the output end of the first inverter
Can it be electrically connected with the first measurement apparatus 2 and the second measurement apparatus 3.First inverter can export the first battery
Dc source is transformed into the alternating-current power supply that instrument can work.
Second electric supply installation can include：Second battery (not shown) and the second inverter (not shown).
Wherein, the second battery can be electrically connected with the input of the second inverter, and the output end of the second inverter can be filled with control
Put electrical connection.
In above-described embodiment, it can also include：Second seal (not shown), control device, the first measurement dress
The second seal can be provided between the 2, second measurement apparatus 3 and ground by putting, to realize the insulation against ground of above-mentioned instrument.
To sum up, in the present embodiment, measuring staff tower is treated by dash current generating means or earthing or grounding means to be measured injects thousands of
Peace even the large impact electric current of tens of kilo-amperes, wandering device force the impact that the earth is injected through shaft tower to be measured or earthing or grounding means to be measured
Electric current is uniform to surrounding diffusing in soil, truly to simulate diffusing situation of the lightning current in soil in nature so that survey
Measure result more accurate；First measurement apparatus measures the surge voltage of shaft tower to be measured or earthing or grounding means to be measured, the second measurement apparatus
The dash current of shaft tower to be measured or earthing or grounding means to be measured is measured, realizes and treats measuring staff tower or earthing or grounding means to be measured progress impact sound
The field measurement answered, can examine drop resistance measure to treat the actual influence for surveying Tower Impulse Grounding Resistance.In addition, with reference to treating measuring staff
The measurement result of tower industrial frequency electric resistance, can analyze the impact coefficient for proposing shaft tower to be measured, to reduce shaft tower impulse grounding electricity to be measured
The engineering design and construction of resistance provides reliable basis.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (15)
1. a kind of lightning impulse response measurement system, it is characterised in that including：Dash current generating loop device (1), first are surveyed
Measure device (2), the second measurement apparatus (3) and diffusing device (4)；Wherein,
The dash current generating loop device (1), shaft tower to be measured (5) and the earth electricity string connect and compose a circuit loop line；Or institute
State dash current generating loop device (1), earthing or grounding means to be measured (6) and connect and compose a circuit loop line, the punching with the earth electricity string
Hitting electric current generating loop device (1) is used to produce dash current, and the dash current is exported to shaft tower to be measured (5) or to be measured
In earthing or grounding means (6)；
First measurement apparatus (2) electrically connects with the shaft tower (5) to be measured or the earthing or grounding means to be measured (6), for described
Measure the surge voltage at shaft tower to be measured (5) or the earthing or grounding means to be measured (6) dash current decanting point；
Second measurement apparatus (3) is used for the impact that measurement flows through the shaft tower to be measured (5) or the earthing or grounding means to be measured (6)
Electric current；
The diffusing device (4) is used to force injects rushing for the earth through the shaft tower (5) to be measured or the earthing or grounding means to be measured (6)
Electric current is hit in soil to the uniform diffusing of surrounding.
2. lightning impulse response measurement system according to claim 1, it is characterised in that the dash current generating loop
Device (1) includes：Impulse current generator (11), TRT (12), isolation potential device (13) and electric current pole (14)；Its
In,
The TRT (12) is electrically connected by the isolation potential device (13) with the impulse current generator (11), is used
In for the impulse current generator (11) provide working power；
The earth terminal and output end of the impulse current generator (11) respectively with the electric current pole (14) and the shaft tower to be measured
(5) electrically connect；Or the earth terminal and output end of the impulse current generator (11) respectively with the electric current pole (14) and described
Earthing or grounding means (6) to be measured electrical connection, the impulse current generator (11) is used to producing the dash current, and by the impact
Electric current is exported to the shaft tower (5) to be measured or the earthing or grounding means to be measured (6)；
The electric current pole (14) is inserted in ground, for collecting the dash current in soil.
3. lightning impulse response measurement system according to claim 1, it is characterised in that first measurement apparatus (2)
Including：Divider (21), voltage pole (22) and the first oscillograph (23)；Wherein,
The voltage pole (22) is inserted in ground, and is electrically connected with the earth terminal of the divider (21), for for divider
(21) zero potential is provided；
The input (211) of the divider (21) is electrically connected with the shaft tower (5) to be measured or the earthing or grounding means to be measured (6),
Surge voltage signal for receiving shaft tower to be measured (5) or the earthing or grounding means to be measured (6), and will by the first default dividing ratios
The surge voltage signal, which is reduced to, is available for the first oscillograph (23) to allow the voltage signal received, and passes through output end
(212) voltage signal is exported to first oscillograph；
The input (231) of first oscillograph (23) is electrically connected with the output end (212) of divider (21), for receiving simultaneously
Show the High Voltage Impulse Waveform of shaft tower to be measured (5) or earthing or grounding means to be measured (6).
4. lightning impulse response measurement system according to claim 2, it is characterised in that second measurement apparatus (3)
Including：Coil (31) and the second oscillograph (32)；Wherein,
The coil (31) is sheathed on the electric connection line of the electric current pole (14) and dash current device (11) earth terminal, and
Default electric insulation is kept with the electric connection line, for measuring the shaft tower to be measured (5) or the earthing or grounding means to be measured (6)
Dash current；
The input (331) of second oscillograph (32) is electrically connected with the coil (31), for receiving the shaft tower to be measured
(5) or the earthing or grounding means to be measured (6) dash current and show the waveform of the dash current.
5. lightning impulse response measurement system according to claim 4, it is characterised in that
The output end of the impulse current generator (11) is electrically connected with the shaft tower (5) to be measured, and by the dash current of generation
Output is into the shaft tower (5) to be measured, and the shaft tower (5) to be measured is electrically connected with the earthing or grounding means to be measured (6)；
First measurement apparatus (2) electrically connects with the shaft tower (5) to be measured, for measuring the shaft tower to be measured (5) and described
Surge voltage at earthing or grounding means (6) dash current decanting point to be measured；
Second measurement apparatus (3) is used for the impact electricity for measuring the shaft tower to be measured (5) and the earthing or grounding means to be measured (6)
Stream；
The diffusing device (4) is used to force injects rushing for the earth through the shaft tower (5) to be measured and the earthing or grounding means to be measured (6)
Electric current is hit in soil to surrounding diffusing.
6. lightning impulse response measurement system according to claim 3, it is characterised in that
The input (211) of the divider (21) is electrically connected with the shaft tower (5) to be measured, for receive shaft tower to be measured (5) and
The surge voltage signal of the earthing or grounding means to be measured (6), and dividing ratios are preset by shaft tower to be measured (5) or described to be measured by second
The surge voltage signal of earthing or grounding means (6), which is reduced to, is available for the first oscillograph (23) to allow the voltage signal received, and passes through
Output end (212) exports the voltage signal to first oscillograph (23)；
First oscillograph (23) is used to receive and shows the shaft tower to be measured (5) and earthing or grounding means to be measured (6) are rushed
Hit voltage waveform.
7. lightning impulse response measurement system according to claim 5, it is characterised in that
The coil (31) is used to measuring the dash current of the shaft tower to be measured (5) and the earthing or grounding means to be measured (6), and described the
Two oscillographs (32) are for receiving the dash current of the shaft tower to be measured (5) and the earthing or grounding means to be measured (6) and showing the punching
Hit the waveform of electric current.
8. lightning impulse response measurement system according to claim 1, it is characterised in that the diffusing device (4) includes：
Multiple return electrodes (41) and copper ring (42)；Wherein,
The copper ring (42) is located on around the shaft tower to be measured (5), the first end of each return electrode (41) with it is described
Copper ring (42) is connected, and the second end of each return electrode (41) is inserted in ground.
9. lightning impulse response measurement system according to claim 2, it is characterised in that also include：
First seal (7), the impulse current generator (11), the TRT (12), the isolation potential device
(13) first seal (7) is provided between ground.
10. lightning impulse response measurement system according to any one of claim 1 to 9, it is characterised in that also include：
First electric supply installation, is electrically connected with first measurement apparatus (2) and second measurement apparatus (3), for institute
State the first measurement apparatus (2) and second measurement apparatus (3) power supply.
11. lightning impulse response measurement system according to claim 10, it is characterised in that the first electric supply installation bag
Include：First battery and the first inverter；Wherein,
First battery is electrically connected with the input of first inverter, the output end of first inverter with it is described
First measurement apparatus (2) and second measurement apparatus (3) are electrically connected.
12. lightning impulse response measurement system according to claim 2, it is characterised in that also include：
Control device, charging process and discharge process for controlling impulse current generator (11).
13. lightning impulse response measurement system according to claim 12, it is characterised in that also include：
Second electric supply installation, is electrically connected with the control device, for being powered to control device.
14. lightning impulse response measurement system according to claim 13, it is characterised in that the second electric supply installation bag
Include：Second battery and the second inverter；Wherein,
Second battery is electrically connected with the input of second inverter, the output end of second inverter and control
Device is electrically connected.
15. lightning impulse response measurement system according to claim 12, it is characterised in that also include：
Second seal, the control device, first measurement apparatus (2) and second measurement apparatus (3) and ground
Between be provided with second seal.
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| CN201710418289.2A CN107219423A (en) | 2017-06-06 | 2017-06-06 | Lightning impulse response measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418289.2A CN107219423A (en) | 2017-06-06 | 2017-06-06 | Lightning impulse response measurement system |
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| CN110456237A (en) * | 2019-07-19 | 2019-11-15 | 清华大学 | Reduce the system and method for Injection Current waveform wave head time in the artificial lightning stroke experiment in transmission line of electricity scene |
| CN113589014A (en) * | 2021-03-30 | 2021-11-02 | 中国电力科学研究院有限公司 | Square wave response device of resistance-capacitance voltage divider, square wave response optimization method and system |
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Application publication date: 20170929 |