CN106707031A - System and method for measuring impulse grounding impedance based on optical fiber transmission and insulation safety - Google Patents
System and method for measuring impulse grounding impedance based on optical fiber transmission and insulation safety Download PDFInfo
- Publication number
- CN106707031A CN106707031A CN201611249746.1A CN201611249746A CN106707031A CN 106707031 A CN106707031 A CN 106707031A CN 201611249746 A CN201611249746 A CN 201611249746A CN 106707031 A CN106707031 A CN 106707031A
- Authority
- CN
- China
- Prior art keywords
- optical
- electrical
- optical fiber
- signal
- converter
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections
- H04B10/802—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections for isolation, e.g. using optocouplers
Abstract
The invention discloses a system and a method for measuring impulse grounding impedance based on optical transmission and insulation safety. The system comprises an impulse current generator, an impulse voltage divider, a Rogowski coil current transducer, a first optical to electrical converter, a second optical to electrical converter, a first electrical to optical converter, a second electrical to optical converter, a first optical fiber, a second optical fiber and an oscilloscope, and is characterized in that the impulse current generator is connected with the impulse voltage divider, one end of the impulse voltage divider is grounded, the other end of the impulse voltage divider transmits divided voltage to the first electrical to optical converter, the first electrical to optical converter converts the divided voltage into a first optical signal, the first optical signal is transmitted to the first optical to electrical converter through the first optical fiber, the first optical to electrical converter converts the first optical signal into a first electrical signal and sends the first electrical signal to the oscilloscope. The system disclosed by the invention can greatly improve the safety of measuring equipment and the testing personnel, and has functions of long-distance transmission, interference prevention, photoelectric isolation, safety and reliability.
Description
Technical field
The invention belongs to thunder and lightning fields of measurement, more particularly to a kind of impulse grounding based on Optical Fiber Transmission and insulation safety
Impedance measurement system and its measuring method.
Background technology
With the development of power system, the accident caused due to transmission line of lightning strike is also increasing.Power system
Operating experience shows that most of transmission line of electricity accidents are all caused by transmission line of lightning strike or shaft tower cause tripping operation.Work as transmission of electricity
When circuit occurs lightning strike accident, earthed system may inject high-frequency percussion electric current, and impedance ground device Lightning Characteristic is main
Refer to that lightning current passes through feature of the earthing or grounding means to surrounding earth diffusing, be usually expressed as the impulse grounding of earthing or grounding means after thunderbolt
Impedance and transient state ground potential are raised.The Transient grounding resistance of electric power line pole tower earthing or grounding means determines tower top electricity during thunderbolt
Position, so as to influence overvoltage and counterattack probability of flashover that line insulator string bears, is directly connected to the lightning protection effect of circuit, because
This, measuring safe operation of the Transient grounding resistance of grounded screen to power system has very important meaning.
A kind of impact grounding impedance measuring system disclosed in patent document CN101819233A, including HVDC source, height
Pressure pulsed capacitance, discharge loop, high-voltage charging switch, high-voltage discharging switch are connected with high-voltage pulse electric capacity and discharge loop
Divertor and the water resistance divider being connected with the reference earth electrode in discharge loop, also including high-voltage pulsed source control
Platform, digital oscilloscope and signal transmission through fiber system, described signal transmission through fiber system include that optical sender, optical fiber, light connect
Receipts machine, described divider and current divider are connected by signal transmission through fiber system with digital oscilloscope, and described height is pressed
Electric switch is motion sphere gap switch.The patent is used for signal acquisition using two-way signal transmission through fiber system, effectively eliminates
The interference of test lead, reduces measurement error.The high-voltage breakdown that the proprietary resistance current divider is easily increased by moment, security
Difference, and it is unfavorable for the security of tester, and due to switching too many low-response, measuring system stability is poor.
A kind of impact characteristics simulation test device of earthing or grounding means disclosed in patent document CN102298108A includes impact
Current feedback circuit (1), hemispherical test flume (13), analogue ground device (14), core-theaded type current sensor (15), surge voltage
Divider (11), wide band digital oscillograph (12), coaxial shielded cable (16), described hemispherical test flume (13) is diameter
0.5~10m, outer wall are the hemispherical shell of steel plate by the material that thickness is 1~3mm, and the outer wall of hemispherical test flume (13) leads to
Cross after band steel is connected with the negative pole of the impulse capacitor group (8) of aforementioned impact current feedback circuit (1) and be grounded, in described hemisphere
The aqueous sand that particle diameter is 0.05~1mm is equiped with shape test flume (13), by changing the water content of sand come artifical resistance
Rate is the soil of 10~1500 Ω m, and analogue ground device (14) is embedded with aqueous sand；Described analogue ground dress
The material for putting (14) is identical with the material of tested actual earthing or grounding means, the physical dimension of the analogue ground device (14), i.e.,
The physical dimension of length and sectional area and tested actual earthing or grounding means, i.e. the ratio n of length and sectional area is for 5~100, n
Simulation ratio, it is analogue ground device to choose a point every 5~20cm on the conductor of described analogue ground device (14)
(14) axial current tested point is simultaneously marked, and core-theaded type current sensor (15) is sleeved on described axial current tested point
Place, described analogue ground device (14) is embedded in the sand in foregoing hemispherical test flume (13), embedded depth according to
The depth of burying of actual earthing or grounding means and simulation ratio n determine, and requires the center of analogue ground device (14) to preceding
The distance for stating each point on hemispherical test flume (13) outer wall is equal, at the Current injection points of described analogue ground device (14)
By the base (21) for weaving copper strips and the lower half copper ball (20) of the pneumatic ignition pill gap (9) of aforementioned impact current feedback circuit (1)
Connection；Described core-theaded type current sensor (15) is by not magnetic framework (25), copper coil (27), integrating circuit (29), thorn
Knife nut connector socket (28) and polymer insulation shell (26) are constituted, described not magnetic framework (25) for internal diameter be 2~
10cm, external diameter are 2.5~12cm, the annulus that diameter of section is 1~4cm, material is non-magnetic polymer, described copper line
Circle (27) is uniformly wound in the not magnetic framework (25) of annular by the copper enamel-covered wire that line footpath is 0.44~1.67mm, coiling
The number of turn is 50~1000 circles, and the lead-out wire at copper coil (27) two ends is connected with the input of integrating circuit (29), integrating circuit
(29) output end is by bayonet nut connector socket (28) and the bayonet nut connector of coaxial shielded cable (16) one end
Plug is connected, and the other end of coaxial shielded cable (16) is by bayonet nut connector plug and wide band digital oscillograph (12)
Second input channel CH2 is connected, and it is the poly- of 0.8~2cm to be cast with thickness on described core-theaded type current sensor (15) surface
Compound insulation crust (26), at polymer insulation shell (26) described in the casting of core-theaded type current sensor (15) surface, should
Bayonet nut connector socket (28) is arranged on polymer insulation shell (26) outward, when measurement injection analogue ground device (14)
When the waveform and its amplitude of total current, described core-theaded type current sensor (15) is sleeved on and is noted to analogue ground device (14)
Enter on the braiding copper strips of electric current；When the axial current waveform and its amplitude of analogue ground device (14) each tested point is measured,
Described core-theaded type current sensor (15) is sleeved on the axial current tested point of analogue ground device (14)；Surge voltage
The earth terminal of divider (11) is by weaving the outer wall and foregoing pulsed capacitance of copper strips and described hemispherical test flume (13)
The band steel connection of the negative pole connection of device group (8)；The signal output part of impulse voltage divider (11) is equiped with bayonet by two ends
The coaxial shielded cable (16) of nut connector plug is connected with the first input channel CH1 of wide band digital oscillograph (12).Should
Complicated soil discharge process, tries simulation when the actual lightning current of patent accurate simulation passes through earthing or grounding means to surrounding soil diffusing
The reliability for testing result is greatly improved, but the patent structure is complicated, and security is poor, and is unfavorable for the security of tester, is surveyed
Accuracy of measurement difference and poor reliability, still have high pressure electric leakage risk, anti-interference magnetic field to still need to the problem of lifting.
A kind of earthing or grounding means impact characteristics measurement modification method is specific as follows disclosed in patent document CN105606924A：The
One step, using being looped around the earthing pole that is equally spaced around earthing or grounding means as backflow pole；Second step, potential reference is clicked
Select on return electrode；3rd step, obtains Transient grounding resistance by way of correction factor, and correction factor is based on actual measurement soil
Model is obtained, and measures Transient grounding resistance.The patent obtains Transient grounding resistance, correction factor by way of correction factor
Obtained based on the soil model of actual measurement, but the patent security is poor, and it is unfavorable for the security of tester, certainty of measurement is poor
And poor reliability.
Therefore, urgency technical issues that need to address in this area are：It is badly in need of one kind and prevents high pressure electric leakage risk, different ground connection
Instrument personal safety and improve the ability lightning impulse grounding impedance measuring system for resisting magnetic interference, Ke Yi great that current potential is caused
The big security for improving measuring apparatus and tester, and certainty of measurement is high, response is fast, the linearity is good, and realize voltage with
Electric current Phototube Coupling, the function required for being completed with an oscillograph, with transmission, anti-tampering, Phototube Coupling, safety over long distances
Reliable function.
Disclosed above- mentioned information is used only for understanding of the enhancing to background of the present invention in the background section, it is thus possible to
Information comprising prior art known to a person of ordinary skill in the art in not constituting home.
The content of the invention
It is an object of the invention to provide a kind of impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety
And method, to solve above-mentioned technical problem.
To achieve these goals, the present invention is adopted the following technical scheme that：
According to an aspect of the present invention, a kind of impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety,
It includes impulse current generator, impulse voltage divider, Rogowski coil current sensor, the first optical-electrical converter, the second light
Electric transducer, the first electrical to optical converter, the second electrical to optical converter, the first optical fiber, the second optical fiber and oscillograph, the dash current
Generator connects the impulse voltage divider, and impulse voltage divider one end ground connection, the voltage that the other end will be got is passed
It is defeated by the first electrical to optical converter, first electrical to optical converter is by the voltage conversion got into the first optical signal, described
One optical signal turns first optical signal via the first Optical Fiber Transmission to the first optical-electrical converter, first optical-electrical converter
Change the first electric signal into and be sent to the oscillograph；The impulse current generator connects the Rogowski coil current sense
Device, the current signal transfer that the Rogowski coil current sensor will be measured turns to the second electrical to optical converter, second electric light
The current signal is converted into the second optical signal by parallel operation, and second optical signal turns via the second Optical Fiber Transmission to the second photoelectricity
Second optical signal is converted into the second electric signal and is sent to the oscillograph by parallel operation, second optical-electrical converter, institute
State oscillograph and be based on the first electric signal and the second electric signal measurement impact impedance.
Preferably, the first electric signal is drawn impact impedance value and draws impact resistance by the oscillograph divided by the second electric signal
Anti- time-domain diagram.
Preferably, the first optical fiber and the second optical fiber include electro-optic conversion, optical transmitting set, optical fiber, optical receiver and photoelectricity
Conversion.
Preferably, the oscillograph is wide band digital oscillograph.
Preferably, the measurement amplitude of the impulse voltage divider be 0~400kV, frequency be 0~2MHz.
Preferably, the Rogowski coil current sensor includes Rogowski coil, and the Rogowski coil includes being wound on annulus
Coil and loop line on shape skeleton.
Preferably, the Rogowski coil current sensor includes the first housing and the second housing, the first housing and second shell
Body has receiving half semicircular first groove and the second groove of Rogowski coil respectively, solid respectively on first groove and the second groove
Surely have the first dielectric shield and the second dielectric shield with cause first housing and the second housing of closure with from Roche
The ground wire passed through in coil insulate.
Preferably, first housing and the second housing connect via fixture cause described first respectively on one side thereof
Housing and the second housing are retractable, and first housing and the second housing are provided with draw-in groove and are used for accommodating on its other side respectively
The lock piece of locking closure first housing and the second housing.
Preferably, the fixture is hinge, and the lock piece is latch.
Another aspect of the present invention, a kind of impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety
Measuring method, comprise the following steps：
In first step, the voltage that the impulse voltage divider will be got is transferred to the first electrical to optical converter, described
One electrical to optical converter arrives the voltage conversion got into the first optical signal, first optical signal via the first Optical Fiber Transmission
First optical signal is converted into the first electric signal and is sent to described by the first optical-electrical converter, first optical-electrical converter
Oscillograph.
In second step, the current signal transfer that the Rogowski coil current sensor will be measured gives the second electro-optic conversion
The current signal is converted into the second optical signal by device, second electrical to optical converter, and second optical signal is via the second light
Fibre is transferred to the second optical-electrical converter, and second optical signal is converted into the second electric signal and hair by second optical-electrical converter
It is sent to the oscillograph.
In third step, the first electric signal is obtained impact impedance value by the oscillograph divided by the second electric signal, and is obtained
Impact impedance time domain beamformer.
Relative to prior art, the invention has the advantages that：It is disclosed by the invention based on Optical Fiber Transmission and insulation
The impact grounding impedance measuring system and its measuring method of safety, for injection high frequency large impact electric current, such as ground connection of thunder and lightning
System needs to measure the rush of current of grounded screen, compared to the prior art, the impulse grounding based on Optical Fiber Transmission and insulation safety
Impedance measurement system can greatly improve the security of measuring apparatus and tester, and of the invention based on Optical Fiber Transmission and exhausted
The impact grounding impedance measuring system certainty of measurement of edge safety is high and response is fast, the linearity is good, and voltage is realized with electric current
Phototube Coupling, therefore the function required for oscillograph can be used to complete, with transmission over long distances, anti-tampering, Phototube Coupling,
Safe and reliable function.
Described above is only the general introduction of technical solution of the present invention, in order to cause technological means of the invention clearer
Understand, reach the degree that those skilled in the art can be practiced according to the content of specification, and in order to allow the present invention
Above and other objects, features and advantages can become apparent, illustrated with specific embodiment of the invention below
Explanation.
Brief description of the drawings
By reading the detailed description in hereafter preferred embodiment, the present invention various other advantage and benefit
Will be clear understanding for those of ordinary skill in the art.Figure of description is only used for showing the purpose of preferred embodiment,
And it is not considered as limitation of the present invention.It should be evident that drawings discussed below is only some embodiments of the present invention,
For those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Other accompanying drawings.And in whole accompanying drawing, identical part is presented with like reference characters.In the accompanying drawings：
Fig. 1 is the Transient grounding resistance measurement system based on Optical Fiber Transmission and insulation safety according to an embodiment of the invention
The structural representation of system；
Fig. 2 is the Transient grounding resistance measurement based on Optical Fiber Transmission and insulation safety in accordance with another embodiment of the present invention
The step of measuring method of system schematic diagram.
The present invention is further explained below in conjunction with drawings and Examples.
Specific embodiment
Specific embodiment of the invention is more fully described below with reference to accompanying drawings.Although being shown in accompanying drawing of the invention
Specific embodiment, it being understood, however, that may be realized in various forms the present invention without that should be limited by embodiments set forth here
System.Conversely, there is provided these embodiments are able to be best understood from the present invention, and can be complete by the scope of the present invention
Convey to those skilled in the art.
It should be noted that having used some vocabulary to censure specific components in the middle of specification and claim.Ability
Field technique personnel it would be appreciated that, technical staff may call same component with different nouns.This specification and right
It is required that not in the way of the difference of noun is used as distinguishing component, but the difference with component functionally is used as what is distinguished
Criterion.As the "comprising" in specification in the whole text and claim mentioned in or " including " be an open language, therefore should solve
It is interpreted into " include but be not limited to ".Specification subsequent descriptions to implement better embodiment of the invention, so the description be with
For the purpose of the rule of specification, the scope of the present invention is not limited to.Protection scope of the present invention is when regarding appended right
It is required that defined person is defined.
For ease of the understanding to the embodiment of the present invention, done by taking several specific embodiments as an example further below in conjunction with accompanying drawing
Explanation, and each accompanying drawing does not constitute the restriction to the embodiment of the present invention.
Fig. 1 is the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety of one embodiment of the present of invention
Structural representation, the embodiment of the present invention will be specifically described with reference to Fig. 1.
As shown in figure 1, being connect An embodiment provides a kind of impact based on Optical Fiber Transmission and insulation safety
Ground impedance measurement system, the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety includes impulse current generator
1st, impulse voltage divider 2, Rogowski coil current sensor 3, the first optical-electrical converter 4, second the 5, first electricity of optical-electrical converter
Photoconverter 6, the second electrical to optical converter 7, the first optical fiber 8, the second optical fiber 9 and oscillograph 10.
The impulse current generator 1 connects the impulse voltage divider 2, and the impulse voltage divider 2 one is terminated
Ground, the voltage that the other end will be got is transferred to the first electrical to optical converter 6, and first electrical to optical converter 6 is by the electricity got
Pressure is converted into the first optical signal, and first optical signal is transferred to the first optical-electrical converter 4, described first via the first optical fiber 8
First optical signal is converted into the first electric signal and is sent to the oscillograph 10 by optical-electrical converter 4.What divider was got
Voltage signal by electric light conversion become optical signal, by Optical Fiber Transmission, to oscillograph before become telecommunications by opto-electronic conversion again
Number measure, measure pulse voltage amplitude U.
The impulse current generator 1 connects the Rogowski coil current sensor 3, the Rogowski coil current sensor
3 current signal transfers that will be measured change the current signal to the second electrical to optical converter 7, second electrical to optical converter 7
Into the second optical signal, second optical signal is transferred to the second optical-electrical converter 5 via the second optical fiber 9, and second photoelectricity turns
Second optical signal is converted into the second electric signal and is sent to the oscillograph 10 by parallel operation 5, by Rogowski coil current sense
The current signal that device is obtained by electric light conversion become optical signal, by Optical Fiber Transmission, to oscillograph before again by opto-electronic conversion
Become electric signal to measure, measure peak point current I.
The oscillograph is based on the first electric signal and the second electric signal measurement impact impedance.Lightning impulse impedance is Z=U/
I.Phototube Coupling and Optical Fiber Transmission can be so realized, with long range transmission, anti-tampering, measurement and degree height, high pressure and measurement
The function of isolation.Because voltage and electric current realize Phototube Coupling, therefore required function can be completed with an oscillograph,
With transmission, anti-tampering, Phototube Coupling, safe and reliable function over long distances.
The embodiment of the present invention is preferably, and the first electric signal is drawn impact resistance by the oscillograph 10 divided by the second electric signal
Anti- value simultaneously draws impact impedance time-domain diagram.The impact impedance of acquisition is plotted impact impedance time-domain diagram by oscillograph 10 under frequency domain,
The impact impedance time-domain diagram can record one section of impact impedance value in period, can obtain average impedance values, be conducive to measurement
The accuracy of system.
In one embodiment, the first optical fiber 8 and the second optical fiber 9 include optical transmitting set, optical fiber and optical receiver.
In one embodiment, the oscillograph 10 is wide band digital oscillograph.Wide band digital oscillograph 10 is
The type digital oscilloscopes of Tektronix 1012, amplitude is gathered for -400~400V, frequency are 0 in 2 signal sampling channels simultaneously
The voltage signal of~100MHz, sample frequency is 0~10GS/s, memory capacity is 0~100MB, can guarantee that the essence of collection signal
Degree and length.The power supply of the wide band digital oscillograph 10 is self-contained storage battery and inverter integrated drive generator, and this not only may be used
During improving the signal to noise ratio of the signal of the acquisition of wide band digital oscillograph 10, and can prevent impulse current generator 1 from discharging, impact
High current causes earth mat current potential drastically to raise and damage wide band digital oscillograph 10 with entering.
In one embodiment, the measurement amplitude of the impulse voltage divider 2 be -400~400kV, frequency be 0~
1MHz.Impulse voltage divider 2 is arranged on the output end of impulse current generator 1, and impulse voltage divider 2 connects with earthing or grounding means
Connect.
In one embodiment, the Rogowski coil current sensor 3 include Rogowski coil, the Rogowski coil include around
Make coil and loop line on annular skeleton.
Further, the Rogowski coil current sensor 3 includes the first housing and the second housing, the first housing and second
Housing has receiving half semicircular first groove and the second groove of Rogowski coil respectively, on first groove and the second groove respectively
Be fixed with the first dielectric shield and the second dielectric shield with cause first housing and the second housing of closure with from sieve
The ground wire passed through in family name's coil insulate.
In one embodiment, first housing and the second housing connect via fixture cause respectively on one side thereof
First housing and the second housing are retractable, first housing and the second housing be provided with its other side respectively draw-in groove with
Accommodate the lock piece for locking closure first housing and the second housing.
Preferably, the fixture is hinge, and the lock piece is latch.
In one embodiment, the first housing can be the housing that stainless steel is made, and the first housing plays protection Roche
The influence in the interference-free magnetic field of coil.The first housing with the first groove for accommodating Rogowski coil can be various such as cuboid
Shape, accommodates a part for Rogowski coil in the first groove, wherein, the diameter of the first groove is slightly larger than the diameter of Rogowski coil with suitable
Locality accommodates Rogowski coil, and the vacant position between the first groove and Rogowski coil can add some bullets of such as elastomeric material
Property ferrite of plastics when ensureing that the first housing and the second housing close up in Rogowski coil can be in close contact, reduce air gap increase
Output quantity.The first dielectric shield is coated with first groove, its major function is insulating effect, i.e. lightening pulse high current is reachable
To hundreds of kilo-amperes, voltage very high is obtained when the first dielectric shield touches ground wire, to measuring apparatus and measurement
Personnel cause potential safety hazard, therefore, it is necessary to increase ambroin part；Second function is to sieve in the first dielectric shield
Family name's coil is fixed, and it is not rocked at will or is dropped from the first dielectric shield.Receiving is additionally provided with first housing
The draw-in groove of lock piece.
In one embodiment, Rogowski coil of the invention is made up of annular skeleton, coil and loop line, the annular
Bone is flexible back bone, and the coil and loop line penetrate the through hole of flexible back bone from one end of flexible back bone, after being drawn by the other end
Uniformly it is wound on flexible back bone with mono-layer fashion.The flexible back bone is made up of silicon rubber, and silicon rubber has high temperature resistant, resistance to
The performances such as high pressure, waterproof, anti-corrosion, can be operated in -60 DEG C~+180 DEG C, be flexible Luo-coil with good pliability
The ideal material of skeleton.Teflom Insulation Material is set with the loop line through the flexible back bone through hole.Preferably,
Loop line and coil-winding are made up of a line in itself, specifically take out silicone rubber for cable inner core, and polytetrafluoro is inserted in inside cable
Vinyl material, as the protection sleeve pipe of enamel-covered wire.The outer layer that described Teflom Insulation Material is enclosed within enamel-covered wire plays fastening
With the protective effect for preventing fracture, the loop construction that this technique makes is compact, and fastness is good, while can guarantee that measurement very high
Precision, suitable industrial production is used.
Fig. 2 is the measuring method according to the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety
Step schematic diagram, the method is comprised the following steps.
In first step S1, the voltage that the impulse voltage divider 2 will be got is transferred to the first electrical to optical converter 6, institute
The first electrical to optical converter 6 is stated by the voltage conversion got into the first optical signal, first optical signal is via the first optical fiber 8
The first optical-electrical converter 4 is transferred to, first optical signal is converted into the first electric signal and hair by first optical-electrical converter 4
It is sent to the oscillograph 10.
In second step S2, the current signal transfer that the Rogowski coil current sensor 3 will be measured turns to the second electric light
The current signal is converted into the second optical signal by parallel operation 7, second electrical to optical converter 7, and second optical signal is via
Two optical fiber 9 are transferred to the second optical-electrical converter 5, and second optical signal is converted into the second electricity by second optical-electrical converter 5
Signal and it is sent to the oscillograph 10.
In third step S3, the first electric signal is obtained impact impedance value by the oscillograph 10 divided by the second electric signal, and
Obtain impact impedance time domain beamformer.
Structure using based on Optical Fiber Transmission and the impact grounding impedance measuring system of insulation safety of the invention main and absolutely
Edge security, is measured by the thunder and lightning of grounded screen by the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety
Pulse current.Roche line in electric current is by being based on the impact grounding impedance measuring system of Optical Fiber Transmission and insulation safety
During coil sensor, because the magnetic field that the time rate of change of electromagnetic induction electric current in Primary Conductor is produced can produce sense in coil
Potential is answered, induced potential is proportional to primary current, the pulse current of ground wire is obtained by the voltage signal for exporting.Voltage leads to
Divider is crossed, divider measures grounded screen voltage, and impedance ground is R=U/I, the present invention is conducive under measurement lightning current effect
The impact impedance and impact diffusing rule of earthing or grounding means.
Although being described to embodiment of the present invention above in association with accompanying drawing, the invention is not limited in above-mentioned
Specific embodiments and applications field, above-mentioned specific embodiment is only schematical, guiding, rather than restricted
's.One of ordinary skill in the art is under the enlightenment of this specification and is not departing from the scope that the claims in the present invention are protected
In the case of, the form of many kinds can also be made, these belong to the row of protection of the invention.
Claims (10)
1. a kind of impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety, it is characterised in that including impact electricity
Flow-generator (1), impulse voltage divider (2), Rogowski coil current sensor (3), the first optical-electrical converter (4), the second light
Electric transducer (5), the first electrical to optical converter (6), the second electrical to optical converter (7), the first optical fiber (8), the second optical fiber (9) and oscillography
Device (10)；
The impulse current generator (1) connects the impulse voltage divider (2), described impulse voltage divider (2) one end
Ground connection, the voltage that the other end will be got is transferred to the first electrical to optical converter (6), and first electrical to optical converter (6) described will be divided
Into the first optical signal, first optical signal is transferred to the first optical-electrical converter to the voltage conversion for obtaining via the first optical fiber (8)
(4), first optical signal is converted into the first electric signal and is sent to the oscillograph by first optical-electrical converter (4)
(10)；The impulse current generator (1) connects the Rogowski coil current sensor (3), the Rogowski coil current sense
The current signal transfer that device (3) will be measured gives the second electrical to optical converter (7), and second electrical to optical converter (7) is by the electric current
Signal is converted into the second optical signal, and second optical signal is transferred to the second optical-electrical converter (5), institute via the second optical fiber (9)
The second optical-electrical converter (5) is stated second optical signal is converted into the second electric signal and the oscillograph (10), institute is sent to
State oscillograph and be based on the first electric signal and the second electric signal measurement impact impedance.
2. the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety according to claim 1, its feature
It is：First electric signal is drawn impact impedance value and draws impact impedance time domain by the oscillograph (10) divided by the second electric signal
Figure.
3. the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety according to claim 1, its feature
It is：First optical fiber (8) and the second optical fiber (9) include optical transmitting set, optical fiber and optical receiver.
4. the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety according to claim 1, its feature
It is：The oscillograph (10) is wide band digital oscillograph.
5. the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety according to claim 1, its feature
It is：The measurement amplitude of the impulse voltage divider (2) is -400~400kV, frequency is 0~1MHz.
6. the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety according to claim 1, its feature
It is：Including Rogowski coil, the Rogowski coil includes being wound on annular skeleton the Rogowski coil current sensor (3)
Coil and loop line.
7. the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety according to claim 1, its feature
It is：The Rogowski coil current sensor (3) includes the first housing and the second housing, and the first housing and the second housing have respectively
There are receiving half semicircular first groove and the second groove of Rogowski coil, first is respectively fixed with first groove and the second groove
Dielectric shield and the second dielectric shield are worn with first housing and the second housing that cause closure with from Rogowski coil
The ground wire insulation crossed.
8. the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety according to claim 7, its feature
It is：First housing and the second housing connect via fixture cause first housing and second respectively on one side thereof
Housing is retractable, and first housing and the second housing are provided with draw-in groove to accommodate for locking closure institute on its other side respectively
State the lock piece of the first housing and the second housing.
9. the impact grounding impedance measuring system based on Optical Fiber Transmission and insulation safety according to claim 8, its feature
It is：The fixture is hinge, and the lock piece is latch.
10. a kind of Transient grounding resistance based on Optical Fiber Transmission and insulation safety as claimed in one of claims 1-9
The measuring method of measuring system, it is comprised the following steps：
In first step (S1), the voltage that the impulse voltage divider (2) will be got is transferred to the first electrical to optical converter (6),
, by the voltage conversion got into the first optical signal, first optical signal is via first for first electrical to optical converter (6)
Optical fiber (8) is transferred to the first optical-electrical converter (4), and first optical signal is converted into by first optical-electrical converter (4)
One electric signal and it is sent to the oscillograph (10)；
In second step (S2), the current signal transfer that the Rogowski coil current sensor (3) will measure turns to the second electric light
The current signal is converted into the second optical signal, the second optical signal warp by parallel operation (7), second electrical to optical converter (7)
Second optical-electrical converter (5) is transferred to by the second optical fiber (9), second optical-electrical converter (5) turns second optical signal
Change the second electric signal into and be sent to the oscillograph (10)；
In third step (S3), the first electric signal is obtained impact impedance value by the oscillograph (10) divided by the second electric signal, and
Obtain impact impedance time domain beamformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611249746.1A CN106707031A (en) | 2016-12-29 | 2016-12-29 | System and method for measuring impulse grounding impedance based on optical fiber transmission and insulation safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611249746.1A CN106707031A (en) | 2016-12-29 | 2016-12-29 | System and method for measuring impulse grounding impedance based on optical fiber transmission and insulation safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106707031A true CN106707031A (en) | 2017-05-24 |
Family
ID=58903906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611249746.1A Pending CN106707031A (en) | 2016-12-29 | 2016-12-29 | System and method for measuring impulse grounding impedance based on optical fiber transmission and insulation safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106707031A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247189A (en) * | 2017-07-26 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | The test system and its method of a kind of Transient grounding resistance |
| CN107390031A (en) * | 2017-08-04 | 2017-11-24 | 南方电网科学研究院有限责任公司 | A kind of mesh grounding impedance test device and its method of testing |
| CN110470907A (en) * | 2019-08-30 | 2019-11-19 | 南方电网科学研究院有限责任公司 | One kind drawing thunder earth loop impedance test device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819233A (en) * | 2010-05-10 | 2010-09-01 | 中国人民解放军理工大学 | Impact grounding impedance measuring system and measuring method thereof |
| CN203216974U (en) * | 2013-04-18 | 2013-09-25 | 成都东方瀚易科技发展有限公司 | Rogowski wire coil current sensor |
-
2016
- 2016-12-29 CN CN201611249746.1A patent/CN106707031A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819233A (en) * | 2010-05-10 | 2010-09-01 | 中国人民解放军理工大学 | Impact grounding impedance measuring system and measuring method thereof |
| CN203216974U (en) * | 2013-04-18 | 2013-09-25 | 成都东方瀚易科技发展有限公司 | Rogowski wire coil current sensor |
Non-Patent Citations (1)
| Title |
|---|
| 来帅: "《基于DSP的冲击接地电阻测量装置研究与设计》", 《中国优秀硕士学位论文全文数据库.工程科技Ⅱ辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247189A (en) * | 2017-07-26 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | The test system and its method of a kind of Transient grounding resistance |
| CN107247189B (en) * | 2017-07-26 | 2024-02-06 | 云南电网有限责任公司电力科学研究院 | Impact grounding impedance testing system and method thereof |
| CN107390031A (en) * | 2017-08-04 | 2017-11-24 | 南方电网科学研究院有限责任公司 | A kind of mesh grounding impedance test device and its method of testing |
| CN107390031B (en) * | 2017-08-04 | 2024-03-26 | 南方电网科学研究院有限责任公司 | Grounding impedance testing device and testing method thereof |
| CN110470907A (en) * | 2019-08-30 | 2019-11-19 | 南方电网科学研究院有限责任公司 | One kind drawing thunder earth loop impedance test device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103116056B (en) | High-voltage direct current broadband domain corona current measurement system | |
| CN102436897B (en) | Flexible Rogowski coil used for detecting direct-current system short-circuit current and method for designing same | |
| WO2020125090A1 (en) | Transformer monitoring system and method | |
| CN106501586A (en) | A kind of lightning impulse current sensor and its device based on insulation safety | |
| CN101122619A (en) | Flexible rogowski coil for impulse current measurement | |
| CN106707031A (en) | System and method for measuring impulse grounding impedance based on optical fiber transmission and insulation safety | |
| CN105428007A (en) | Combined electric appliance with multi-capacitive screen insulation core | |
| CN201489038U (en) | Flexible Roche coil for measuring impulse current | |
| CN107589356A (en) | Transformer insulated property detection means | |
| CN207301251U (en) | Transformer insulated property detection device | |
| CN105891563A (en) | High-altitude nuclear explosion electromagnetic pulse standard signal analog device | |
| Yang et al. | Measurement of lightning-induced overvoltage in power distribution lines using ceramic-capacitor insulator | |
| CN203164258U (en) | High-voltage direct current wide frequency domain corona current measuring system | |
| CN103235201A (en) | Type test method and test circuit for extra-high-voltage series-compensation spark-gap triggering control cabinet | |
| CN114019329A (en) | XLPE cable insulation early deterioration multidimensional evaluation system and method based on machine learning | |
| CN103954858B (en) | Airborne antenna lightning effects test macro and method | |
| CN203037716U (en) | Transformer and reactor entrance VFTO high-frequency signal test device for GIS transformer station | |
| CN102608389B (en) | Measurement method and measurement system for VFTC (very fast transient current) | |
| CN206209033U (en) | Leakage Current detection probe and Leakage Current detecting system | |
| CN206832933U (en) | The equal properties of flow test system of lightning arrester connected in parallel | |
| CN109991468A (en) | A kind of method and device for testing ultra-high voltage transformer station electrical secondary system disturbance voltage | |
| Ge et al. | Coupling characteristics of electromagnetic disturbance of on-site electronic device power port in substations and its suppression | |
| CN102841245A (en) | Device for detecting end screen current parameter of high-voltage transformer bushing in real time, and control method for device | |
| CN203688621U (en) | Electronic current transformer | |
| CN210109246U (en) | Power cable intermediate head partial discharge detection system based on composite electric field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |
|
| WD01 | Invention patent application deemed withdrawn after publication |