CN107271846A - Square wave current ripple triggers the test device and method of lower OPGW thunderbolt effect - Google Patents
Square wave current ripple triggers the test device and method of lower OPGW thunderbolt effect Download PDFInfo
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- CN107271846A CN107271846A CN201710488400.5A CN201710488400A CN107271846A CN 107271846 A CN107271846 A CN 107271846A CN 201710488400 A CN201710488400 A CN 201710488400A CN 107271846 A CN107271846 A CN 107271846A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The test device and method test item optical fiber compound ground cable for triggering lower OPGW thunderbolt effect the invention discloses a kind of square wave current ripple are connected with the double thunder and lightning flow component test loop being connected in parallel between management system of measurement and control respectively by acting on gap；First test loop is more than 100kV, the quantity of electric charge not less than 10C, average peak current not less than 2kA, 1~5ms of duration, the first thunder and lightning flow component that waveform is square wave to the test item output voltage with effect gap, and the second test loop exports 100~400A of DC current amplitude, 50~200C of the quantity of electric charge, 0.25~0.5s of duration the second thunder and lightning flow component to the test item with effect gap.With it is existing can not simulate actual thunderbolt to OPGW impulsive force, electromagnetic force and resistance fuel factor compared with, the present invention can truly simulate thunderbolt direct effect of the actual thunderbolt to OPGW.
Description
Technical field
The invention belongs to direct effect experimental technique field of being struck by lightning, it is related to square wave current ripple with triggering lower optical fiber composite overhead
The test device and method of line thunderbolt effect.
Background technology
With the development of China's power grid construction and power communication, OPGW (Optical Fiber
Composite Overhead Ground Wire, OPGW) application it is increasingly extensive, power communication scheduling aspect play it is more next
More important effect.OPGW strands break accidents happen occasionally, and OPGW strands break may have influence on the safety of power system
Operation and reliable communication, therefore the research and corresponding prophylactico-therapeutic measures of OPGW strands break mechanism are extremely important.
The research of OPGW strands break mechanism is the focus and difficult point paid close attention to both at home and abroad, and strands break e measurement technology and examination
Key technology and Core equipment that equipment is strands break study mechanism are tested, OPGW thunderbolt direct effect experimental techniques and experiment are set
It is standby to meet the demand of OPGW thunderbolt study mechanisms and technology development.In terms of effect test specification of being struck by lightning, European Union and U.S. army
Mark define airborne vehicle thunderbolt test requirements document and thunder and lightning component, but IEEE 1138 only define OPGW thunderbolt 0 class, 1 class, 2
The ginsengs such as class, the current peak of 3 class long duration components experiment, the quantity of electric charge, pulse duration and effect gap (50mm)
Number, the parameter of thunder and lightning component is respectively current peak 100A-400A, quantity of electric charge 50-200C, duration 0.5s, but is lacked pair
The clear stipulaties of thunder and lightning flow component injection mode and waveform parameter.
At present, the experiment of OPGW thunderbolts effect only considers long duration thunder and lightning flow component, because its operating voltage is extremely low,
50mm effect gap can not be punctured, can only be tied up test item and long duration with conductive filament (or fuse)
Current component generator is connected, and this test method can not simulate actual be struck by lightning when actual thunderbolt occurs and OPGW is produced at all
Raw impact stress effect, electromagnetism stress effect and follow-up Middle Component and and long-time current component fuel factor, cause in bundle
Tie up the dispersed big, low precision of the scaling loss for multiply optical fiber a little occur, stranded and result of the test.OPGW thunderbolt direct effects experiment side
Method does not have standard can be according to, and the backwardness of experimental rig has become the serious flow of research and Operation of Electric Systems for constraining OPGW
The bottleneck of safety and stability lifting.
The content of the invention
Present invention solves the problem in that providing the survey that square wave current wave triggers lower OPGW thunderbolt effect
Apparatus and method are tried, the unreasonable part of current OPGW thunderbolts direct effect test method is overcome, being capable of the actual thunder of accurate simulation
Hit shock effect, electromagnetism stress effect and the fuel factor produced to OPGW.
The present invention is to be achieved through the following technical solutions：
Square wave current ripple triggers the test device of lower OPGW thunderbolt effect, test item optical fiber compound ground cable
It is connected respectively with the double test loop being connected in parallel between management system of measurement and control by acting on gap；
First test loop to effect gap test item output voltage be more than 100kV, the quantity of electric charge not less than 10C,
Average peak current is not less than 2kA, 1~5ms of duration, the first thunder and lightning flow component that waveform is square wave, and it includes phase successively
The first lightning current generating loop, the first coupling/decoupling network DCN and the first current sensor of connection；First lightning current occurs
Loop includes charhing unit, discharge cell and square-wave waveform formation unit；
Second test loop exports 100~400A of DC current amplitude, the quantity of electric charge 50 to the test item with effect gap
~200C, 0.25~0.5s of duration the second thunder and lightning flow component, it, which includes being sequentially connected the second lightning current connect, occurs back
Road, the second coupling/decoupling network DCN and the second current sensor；Second lightning current generating loop includes charhing unit, electric discharge list
Member and waveform formation unit；
Described management system of measurement and control controls the time sequence parameter of double test loop, and it includes control unit and measurement is single
Member；Control unit includes main control unit and coupled respectively programmable logic controller and miniature processing unit,
Measuring unit includes the oscillograph being associated with main control unit；Programmable logic controller fills with double test loop respectively
Electric unit is connected with discharge cell；Miniature processing unit is resurveyed by photoelectric isolation module, high pressure trigger module with two respectively
The switch in examination loop is connected；Current sensor of the oscillograph respectively with double test loop is connected, the measurement number of oscillograph
Main control unit is uploaded to according to by wireless network.
The first described thunder and lightning flow component is to apply accurate simulation thunder-strike current to test item to dissipate in thunderbolt attachment point
Stream, effect gap breakdown can be turned on and can inject the second thunder and lightning flow component；
Second thunder and lightning flow component is the substantially invariable DC current of output voltage.
The first described test loop includes charging resistor, and a termination high direct voltage dc source of charging resistor is another
One end with the first chain storage capacitor C1 and the first chain formation inductance L1 is held to be connected；The first chain formation inductance L1 other end and the
Two chain storage capacitor C2 and the second chain formation inductance L2 are connected, the N-1 chains formation inductance LN-1 other end and N chain energy storage
Electric capacity CN and N chains formation inductance LN one end connection, the N chains formation inductance LN other end and one end of main switch electrically connect
Connect, one end of the other end of main switch and build-out resistor is connected, the other end of build-out resistor is with coupling/the Single port of decoupling network
Connection, the other end of the first chain to N chain storage capacitors is connected and is connected to one end of measurement sensor, measurement sensor it is another
One end is grounded；
Second test loop includes the transformer of input termination 380V power supplies, the output termination full-bridge rectification of transformer
Module, the high-pressure side of the output of full-bridge rectification module and one end of smoothing reactor are connected, another termination master of smoothing reactor
One end of switch, another termination second of main switch couples/decoupling network DCN one end, the output of full-bridge rectification module it is low
Pressure side connects the second current metering sensor, and one end of the second current metering sensor is also grounded；
First coupling/decoupling network DCN, the second coupling/decoupling network DCN other end link together, and with effect
Gap one end connection, act on gap another termination optical fiber composite overhead cable one end, optical fiber composite overhead cable it is another
One end is grounded.
The first described coupling/decoupling network DCN ensures accurate application of the first thunder and lightning flow component to test item, prevents
Two thunder and lightning flow component are poured into the energy of the first test loop；It is made up of discharging gap, electric capacity, resistance or its combination；
The second described coupling/decoupling network DCN ensures accurate application of the second thunder and lightning flow component to test item, prevents
Electromagnetic interference and destruction of the one thunder and lightning flow component to the second test loop；It is low pass filter or inverse direction filter.
Described management system of measurement and control controls the time sequence parameter of double test loop by main control unit, and it includes：
The inter-spike intervals between discharge voltage, main switch and Crowbar switches in first test loop, main switch electric discharge
The distance between ball gap；And between first test loop, the effect moment of the second test loop, double lightning current generating loop
Time interval；
Main control unit also carries out the setting of following parameter：Charhing unit connects on/off in double lightning current generating loop
Open, the emergent stopping in the electric discharge of the raise/lower of charging voltage, test loop and process of the test.
Described programmable logic controller is after reception control unit instruction, and the SECO for carrying out test model is held
OK：
1. in the first test loop charhing unit control, the lifting/lowering of on/off, high pressure comprising high pressure；
2. the adjustment and control of the discharge switch in the first test loop, include the adjustment of the clearance distance of main switch, make
The clearance distance for obtaining main switch is adjusted with the change of preset discharge voltage；
3. the manually and automatically control of the main switch in the first test loop, the energy of initial storage can pass through multichain waveform
Component release is formed, the square wave lightning current component waveform with certain duration of desired design is produced；
4. the safety relief control of the storage capacitor in the first test loop, when system operation breaks down or stops
During experiment, the energy of electromagnetic field on storage capacitor element must all release；
5. the input of the second test loop/excision control.
The control of described miniature processing unit includes：
1. between the first test loop, the second test loop sequential accurate control；
2. the input of the second test loop and excision control.
The control of described measuring unit is：
The test parameters related to measurement, including the first current sensor, the second current sense are set by main control unit
The scale factor of device, the work of the first lightning current component amplitude desired value, the second lightning current component amplitude desired value and oscillograph
Make mode；
First thunder and lightning flow component, the current waveform of the second thunder and lightning flow component pass through the first current sensor, the second electricity respectively
Flow sensor is extracted and is input in oscillograph, main after main control unit receives the electric discharge instruction of thunder and lightning flow component generating loop
The measured waveform data that unit reads oscillograph are controlled, analysis and the screen display of test data is carried out.
The square wave current ripple triggers the thunderbolt effect test of the test device of lower OPGW thunderbolt effect
Method, including following operation：
1) started shooting after test item connection is ready, set the double thunderbolt of OPGW directly to imitate by main control unit
The SECO parameter that should be tested, and all control parameters are transmitted to miniature processing unit；
2) charging voltage, discharge voltage and the first lightning current for setting the first test loop by main control unit trigger
The clearance distance that main discharge is switched in component generating loop, programmable logic controller is according to the size of the discharge voltage of setting
Adjust switch electrode distance；
3) charge power supply is connected, the first test loop of the effect test that is struck by lightning to OPGW charges,
When the charging voltage that miniature processing unit detects the first test loop storage capacitor is all higher than or equal to the electric discharge pre-set
During voltage, miniature processing unit will export first control pulse；
4) miniature first control signal of processing unit is output to optically isolated module, and first is output to by optically isolated module
Road high pressure trigger module control end, controls it to act and exports control pulse all the way to the triggering of the main switch of the first test loop
In loop, trigger circuit works and makes the main switch triggering and conducting of the first test loop；
5) from miniature control process unit receives first control signal output, miniature processing unit enters timing shape
State, when timing meets the SECO parameter between the first thunder and lightning flow component pre-set and the second thunder and lightning flow component
When, miniature processing unit exports second control signal, and the second tunnel trigger control module control end is reached by optically isolated module,
Control the second tunnel control module action and output control signal closes the switch of the second test loop, the second thunder and lightning flow component is applied
It is added on test item；When the switch-closed time of the second test loop meets the effect of the second thunder and lightning flow component set in advance
Between when, miniature processing unit output control signal makes switching off for the second test loop generating loop；So that the first lightning current
Component, the second thunder and lightning flow component just successively, continual be applied on tested object OPGW；
6) testing result is extracted and is input in oscillograph by the first current sensor, the second current sensor, main control unit
The measured waveform data of oscillograph are read, analysis and the screen display of test data is carried out.
Compared with prior art, the present invention has following beneficial technique effect：
The present invention can not be applied to the OPGW with gap for low pressure long duration thunder and lightning flow component and carry out effective thunder
Hit the present situation of experiment, it is proposed that preferential apply has discharge voltage height, held before low pressure long duration thunder and lightning flow component is injected
Continuous time length, the square wave lightning current with large energy trigger the test method of component, can be to the OPGW test products with gap
Carry out thunderbolt effect test, shock effect, electromagnetism stress effect and fuel factor that accurate simulation thunderbolt is produced to OPGW.The present invention
OPGW thunderbolt effect tests include the first lightning current and trigger component (square wave) and the second thunder and lightning flow component.First thunder and lightning flow component
The nominal discharge voltage of generating loop is generally 100kV or so or higher, can relatively accurately simulate thunder-strike current in thunderbolt
The diffusing of attachment point；Second thunder and lightning flow component generating loop of long duration is a long-term DC current source,
Its current amplitude, the quantity of electric charge and duration meet DC current amplitude 100-400A, quantity of electric charge 50-200C, duration
It is adjustable in 0.5s.
First thunder and lightning flow component of the OPGW thunderbolt effect tests of the present invention uses the LC with coupling/decoupling network DCN
Chain type loop, coupling/decoupling network DCN ensures the first thunder and lightning flow component of square wave to the accurate application of test item and to second
Effective suppression and isolation that thunder and lightning flow component is carried out；Second thunder and lightning flow component of OPGW thunderbolt effect tests is with the second coupling
The low-voltage direct big current loop of conjunction/decoupling network, the output of DC current is realized by the peaceful ripple inductor of three phase rectifier, the
The effect of two couplings/decoupling network is to ensure that the second thunder and lightning flow component to the accurate application of test item and suppresses the first lightning current
The electromagnetic interference of component and destruction.
The control of the OPGW thunderbolt effect tests of the present invention, can using main control unit and programmable logic controller realization
To realize the controlling switch and of the discharge switch in the controlling switch of main switch in the first test loop, the second test loop
Time interval presetting and accurately controlling between one thunder and lightning flow component, the second thunder and lightning flow component.
Traditional test method can not simulate actual thunderbolt to OPGW impulsive force, electromagnetic force and resistance fuel factor, also without
The diffusing effect of the actual thunderbolt of method simulation, causes the result of the test measured can not characterize actual thunderbolt direct effect.The present invention
Using with operating voltage high (discharge voltage is generally hundred kilovolts or so or higher) and with certain continuous discharging time and electricity
The square wave current ripple of amplitude/energy is flowed as pulse is triggered, and can puncture the test item OPGW with certain interval distance makes
It is turned on, because the first thunder and lightning flow component has certain current amplitude and duration, because so that the second thunder and lightning flow component
Can successfully it inject, thunderbolt effect of the true actual thunderbolt of simulation to OPGW.
Brief description of the drawings
Fig. 1 triggers the test device and method of lower OPGW thunderbolt effect for the square wave current ripple of the present invention
Structured flowchart.
Fig. 2 a are the mode of action of traditional experiment thunderbolt direct effect experiment；
The mode of action that Fig. 2 b test for the thunderbolt direct effect of the present invention.
Fig. 3 is the first test loop of the OPGW thunderbolt direct effect experiments of the present invention, the circuit original of the second test loop
Reason figure.
Fig. 4 is the first thunder and lightning flow component of the invention, the second lightning current component waveform schematic diagram.
Fig. 5 constitutes structure chart for the control system of the present invention.
Fig. 6 is management system of measurement and control operational process of the invention.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
Referring to Fig. 1, a kind of square wave current ripple triggers the test device of lower OPGW thunderbolt effect, test item
Optical fiber compound ground cable is by acting on double thunder and lightning flow component test loop of the gap respectively with being connected in parallel between management system of measurement and control
It is connected；
First test loop to effect gap test item output voltage be more than 100kV, the quantity of electric charge not less than 10C,
Average peak current is not less than 2kA, 1~5ms of duration, the first thunder and lightning flow component that waveform is square wave, and it includes phase successively
The first lightning current generating loop, the first coupling/decoupling network DCN and the first current sensor of connection；First lightning current occurs
Loop includes charhing unit, discharge cell and square-wave waveform formation unit；
Second test loop exports 100~400A of DC current amplitude, the quantity of electric charge 50 to the test item with effect gap
~200C, 0.25~0.5s of duration the second thunder and lightning flow component, it, which includes being sequentially connected the second lightning current connect, occurs back
Road, the second coupling/decoupling network DCN and the second current sensor；Second lightning current generating loop includes charhing unit, electric discharge list
Member and waveform formation unit；
Described management system of measurement and control controls the time sequence parameter of double test loop, and it includes control unit and measurement is single
Member；Control unit includes main control unit and coupled respectively programmable logic controller and miniature processing unit,
Measuring unit includes the oscillograph being associated with main control unit；Programmable logic controller fills with double test loop respectively
Electric unit is connected with discharge cell；Miniature processing unit is resurveyed by photoelectric isolation module, high pressure trigger module with two respectively
The switch in examination loop is connected；Current sensor of the oscillograph respectively with double test loop is connected, the measurement number of oscillograph
Main control unit is uploaded to according to by wireless network.
The double continuous sequential experimental rig of effect specifically, the OPGW that the present invention is provided is struck by lightning, by
First lightning current generating loop, the second lightning current generating loop, the first coupling/decoupling network DCN, the second coupling/decoupling network
DCN, test item optical fiber compound ground cable, the first current sensor, the second current sensor, effect gap, OPGW and observing and controlling pipe
Reason system is constituted.Measurement and control unit is main by industrial control computer, programmable logic controller (PLC), dedicated control circuit and oscillograph
Composition.
The main function of first thunder and lightning flow component of double continuous sequential is being capable of simulating natural environment to test item application
The amplitude and energy of direct thunder and lightning, its operating voltage are higher, are typically not less than hundred kilovolts of magnitudes, current amplitude is typically in 5-
20kA, duration typically in 1-5ms, can will effect gap breakdown turn on and the second thunder and lightning flow component can successfully be drawn
Hair injection；The main function of low pressure long duration thunder and lightning flow-generator is to provide big energy or the transmission of big electric charge for test item
Amount；
Referring to Fig. 1, the first coupling/decoupling network DCN effect has two：One is to ensure that the energy of the first thunder and lightning flow component
It can be applied on test item OPGW, on the other hand can suppress shadow of the follow-up second thunder and lightning flow component to the first test loop again
Ring the shunt influence of effect and the first test loop to load；
Second coupling/decoupling network DCN effect couples with first/and the effect of decoupling network is similar, and one is to ensure that second
Thunder and lightning flow component can be applied on test item OPGW, on the other hand can suppress the first thunder and lightning flow component again to the second electric current point
Measure the influence and destruction of generating loop.
Referring to Fig. 1, the first current sensor, the effect of the second current sensor are respectively to the first lightning current component waves
Shape, the second lightning current component waveform are accurately extracted；The effect in effect gap is the actual thunderbolt of simulation to test item OPGW
Effect situation.The main task of computer measurement and control system is to control work, measurement lightning current waveform and the progress of generator
The analysis and processing of data.
Referring to Fig. 2 a~2b, the double continuous uninterrupted sequential thunderbolt direct effect test method of OPGW of the invention and tradition
Can the difference of test method be carry out the OPGW with effect gap thunderbolt direct effect experiment, the actual thunder of actual pattern
Hit the mechanism to OPGW.
Test method traditional Fig. 2 a is low pressure long duration current source due to thunder and lightning flow component, because output voltage is low
(being powered mostly using 24V-48V battery), can not carry out thunderbolt direct effect to the OPGW test products with effect gap at all
Experiment, it has to be fixedly connected on direct current long duration power supply on test item by electrical connection, such test method
Actual thunderbolt can not be simulated to OPGW impulsive force, electromagnetic force and resistance fuel factor, the diffusing that can not also simulate actual thunderbolt is made
With causing the result of the test measured can not characterize actual thunderbolt direct effect.
Fig. 2 b test method, which is used, has operating voltage high (discharge voltage is generally hundred kilovolts or so or higher) and tool
There is the square wave current ripple of certain continuous discharging time and current amplitude/energy as pulse is triggered, can will carry certain interval
The test item OPGW of distance, which punctures, to be turned it on, due to when the first lightning current triggers the component to have certain current amplitude and be lasting
Between, because enabling the second thunder and lightning flow component successfully to inject, thunderbolt effect of the true actual thunderbolt of simulation to OPGW.
Referring to Fig. 3, OPGW thunderbolt effect tests of the invention, which include the first thunder and lightning flow component, the second thunder and lightning flow component, to be occurred
Loop, wherein the first thunder and lightning flow component is used in efficient Crowbar loops, loop comprising two switches of electric discharge：Main switch and
Crowbar is switched.
First test loop by storage capacitor, form inductance, main switch, measurement sensor.Second test loop is by inciting somebody to action
Alternating voltage carry out full-bridge rectification, Ping Bo and obtain that load capacity is strong, the substantially invariable dc source of output voltage.
Referring to Fig. 3, a termination direct current of the charging resistor of the first test loop (the first thunder and lightning flow component generating loop) is high
Dc source is pressed, the other end is connected with the input Two-port netwerk of storage capacitor-inductance chain, storage capacitor-inductance chain output Two-port netwerk
High-pressure side be connected with one end of main switch, the other end of main switch is connected with the Single port of coupling/decoupling network, energy storage electricity
The low-pressure end of appearance-inductance chain output Two-port netwerk is connected with the Single port of current metering sensor, current metering sensor it is another
Port is grounded.If measurement sensor is electromagnetic induction type, measurement sensor be directly sleeved on storage capacitor-inductance chain export to
On the line of ground connection.
Specifically, a termination high direct voltage dc source of charging resistor, the other end and the first chain storage capacitor C1 and the
One chain formation inductance L1 one end connection；The first chain formation inductance L1 other end and the second chain storage capacitor C2 and the second chain
It is connected into inductance L2, N-1 chains formation inductance the LN-1 other end and N chain storage capacitor CN and N chains formation inductance LN
One end connection, the N chains formation inductance LN other end and one end of main switch be electrically connected, and the other end of main switch is with matching
One end connection of resistance, the other end of build-out resistor is connected with the Single port of coupling/decoupling network, the first chain to N chain energy storage
The other end of electric capacity is connected and is connected to one end of measurement sensor, and also one end of measurement sensor is grounded.
The input termination 380V power supplies of the transformer of second test loop, it exports termination full-bridge rectification module, entirely
The high-pressure side of the output of bridge rectification module and one end of smoothing reactor are connected, and the one of another termination main switch of smoothing reactor
End, one end of another termination coupling/decoupling network of main switch, the low pressure termination current measurement of the output of full-bridge rectification module is passed
Sensor, the other end ground connection of current metering sensor.
First, second coupling/decoupling network DCN the other end all links together and one end with acting on gap connects
Connect, act on gap another termination optical fiber composite overhead cable OPGW one end, optical fiber composite overhead cable OPGW the other end
Ground connection.
Referring to Fig. 3, Fig. 4, the waveform of the first thunder and lightning flow component is unipolarity ripple, and its average discharge current peak value is general at least
For 2kA, the duration is not less than 1-5ms；Long duration the second thunder and lightning flow component generating loop is one long-term
DC current source, its current amplitude, the quantity of electric charge and duration meet DC current amplitude 100-400A (adjustable), the quantity of electric charge
It is adjustable in 50-200C (adjustable), duration 0.5s.
First square wave lightning current component generating loop has the characteristics of discharge voltage is high, the duration is long, can to
The OPGW in certain effect gap carries out the application of primary power and ensures the second thunder and lightning flow component in the middle of follow-up
Effective initiation injection；First lightning current triggers the nominal discharge voltage of component generating loop to be generally 100kV or so or higher,
Diffusing of the thunder-strike current in thunderbolt attachment point can relatively accurately be simulated；Long duration the second thunder and lightning flow component generating loop
It is a long-term DC current source, its current amplitude, the quantity of electric charge and duration meet DC current amplitude 100-
It is adjustable in 400A (adjustable), quantity of electric charge 50-200C (adjustable), duration 0.5s.
Referring to Fig. 3, OPGW thunderbolt effect tests of the invention, which include the first thunder and lightning flow component, the second thunder and lightning flow component, to be occurred
Loop carries coupling/decoupling network, wherein the first coupling/decoupling network DCN effect is to ensure that the first thunder and lightning flow component pair
The accurate application of test item and the second thunder and lightning flow component is effectively isolated, prevents the second thunder and lightning flow component from testing back first
The influence and destruction on road；
Second coupling/decoupling network DCN effect be to ensure that the first thunder and lightning flow component to the accurate application of test item and
Suppress the influence and destruction of the first thunder and lightning flow component.From this layer of meaning, the second coupling decoupling networking DCN is exactly substantially one
Low pass filter or inverse direction filter.
Coupling/decoupling network of first thunder and lightning flow component typically can with discharging gap, electric capacity, resistance or its combined
Into；Coupling/decoupling network of second thunder and lightning flow component can be inductance, the low-pass network of electric capacity composition, or by inductance, protection
The low-pass network of element composition.
Referring to Fig. 5, the measurement and control unit that effect test is attacked in the double thunderbolt of OPGW of the invention directly is divided into control
Unit processed and measuring unit.The structure of control unit is by main control unit (industrial control computer), Programmable logical controller
Device, microcomputer processing unit, optically isolated module and high pressure trigger module composition；Measuring unit by industrial control computer and
Oscillograph is constituted.
The operation principle of control unit is described as follows：
The main function of main control unit (industrial control computer) is to carry out test parameters setting, the sequential of test model
Control, the control of trystate and Real time displaying.Test parameters can be set on the TT＆C software interface of industrial control computer
Put the electric discharge between test parameters, including discharge voltage, main switch and the Crowbar switches of the first thunder and lightning flow component generating loop
The distance between interval, main switch ball discharge gap；And the first thunder and lightning flow component generating loop, the second thunder and lightning flow component occur back
Time interval between the effect moment on road and double lightning current generating loop etc.；Trystate, which is controlled, and display is main includes two
The on/off of weight lightning current generating loop charge power supply, the raise/lower of charging voltage, the electric discharge and experiment of generating loop
During emergent stopping etc..
The effect of programmable logic controller is performed in the SECO for receiving progress test model, including：
1. the control of the first thunder and lightning flow component generating loop charhing unit, the main on/off comprising high pressure, high pressure
Lifting/lowering.
2. the adjustment and control of the discharge switch of the first thunder and lightning flow component generating loop, mainly includes the clearance gap of main switch
From adjustment so that the clearance distance of main switch can with the change of preset discharge voltage adjust automatically.
3. the manually and automatically control of the main switch of the first thunder and lightning flow component generating loop, the energy meeting of system initial storage
Discharged by waveform formation component, produce the lightning current component waveform of desired design.
4. the safety relief of storage capacitor is controlled in the first thunder and lightning flow component generating loop, when event occurs in system operation
When barrier or stopping experiment, the energy of electromagnetic field on storage capacitor element must all release, in case operating personnel enter test block
When in violation of rules and regulations touch and occur contingency.
5. the input of the second thunder and lightning of long duration flow component/excision control etc..
The main function of microcomputer processing unit mainly includes the following aspects：
1. main switch in the first thunder and lightning flow component generating loop of OPGW thunderbolt effect test is carried out
Accurate control；
2. the accurate control of sequential between thunderbolt the first thunder and lightning flow component of effect test, the second thunder and lightning flow component is carried out；
3. input and the excision control of the second thunder and lightning flow component are carried out.
The operation principle of measuring unit is described as follows：
(1) test parameters related to measurement, including first are set on the TT＆C software interface of industrial control computer
Current sensor, the second current sensor, the first lightning current component amplitude desired value for needing experiment, the second thunder and lightning flow component width
It is worth desired value and the working method of oscillograph.
(2) first thunder and lightning flow component, the second thunder and lightning flow component, carried by the first current sensor, the second current sensor
Take and be input in oscillograph, after industrial control computer receives the electric discharge instruction of thunder and lightning flow component generating loop, industry control
Computer processed reads the measured waveform data of oscillograph by light network interface, and the analysis and screen output for then carrying out test data are aobvious
Show.
Referring to Fig. 6, the observing and controlling flow of OPGW thunderbolt effect test of the invention is：
1) major loop, microcomputer processing unit, the Programmable logical controller of OPGW thunderbolt direct effect experiments are opened
The power supply of device and computer measurement and control management system.
2) operation program that computer measurement and control manages management system is started.
3) charge power supply is connected, the first test loop of the effect test that is struck by lightning to OPGW charges,
When the charging voltage that miniature processing unit detects the first test loop storage capacitor is all higher than or equal to the electric discharge pre-set
During voltage, miniature processing unit will export first control pulse；
4) miniature first control signal of processing unit is output to optically isolated module, and first is output to by optically isolated module
Road high pressure trigger module control end, controls it to act and exports control pulse all the way to the triggering of the main switch of the first test loop
In loop, trigger circuit works and makes the main switch triggering and conducting of the first test loop；
5) from miniature control process unit receives first control signal output, miniature processing unit enters timing shape
State, when timing meets the SECO parameter between the first thunder and lightning flow component pre-set and the second thunder and lightning flow component
When, miniature processing unit exports second control signal, and the second tunnel trigger control module control end is reached by optically isolated module,
Control the second tunnel control module action and output control signal closes the switch of the second test loop, the second thunder and lightning flow component is applied
It is added on test item；
When the switch-closed time of the second test loop meets the action time of the second thunder and lightning flow component set in advance,
Miniature processing unit output control signal makes switching off for the second test loop generating loop；So that the first thunder and lightning flow component,
Second thunder and lightning flow component just successively, continual be applied on tested object OPGW；
6) testing result is extracted and is input in oscillograph by the first current sensor, the second current sensor, main control unit
The measured waveform data of oscillograph are read, analysis and the screen display of test data is carried out.
Example given above is to realize the present invention preferably example, and the invention is not restricted to above-described embodiment.This area
Technical staff any nonessential addition, the replacement made according to the technical characteristic of technical solution of the present invention, belong to this
The protection domain of invention.
Claims (9)
1. square wave current ripple triggers the test device of lower OPGW thunderbolt effect, it is characterised in that test item light
Fibre compound ground cable is by acting on double thunder and lightning flow component test loop phase of the gap respectively with being connected in parallel between management system of measurement and control
Connection；
First test loop is not less than 10C more than 100kV, the quantity of electric charge to the test item output voltage with effect gap, is averaged
Peak point current is not less than 2kA, 1~5ms of duration, the first thunder and lightning flow component that waveform is square wave, and it, which includes being sequentially connected, connects
The first lightning current generating loop, the first coupling/decoupling network DCN and the first current sensor；First lightning current generating loop
Including charhing unit, discharge cell and square-wave waveform formation unit；
Second test loop to the test item with effect gap export DC current amplitude 100~400A, the quantity of electric charge 50~
200C, 0.25~0.5s of duration the second thunder and lightning flow component, it include being sequentially connected connect the second lightning current generating loop,
Second coupling/decoupling network DCN and the second current sensor；Second lightning current generating loop includes charhing unit, discharge cell
With waveform formation unit；
Described management system of measurement and control controls the time sequence parameter of double test loop, and it includes control unit and measuring unit；Control
Unit processed includes main control unit and coupled respectively programmable logic controller and miniature processing unit, and measurement is single
Member includes the oscillograph being associated with main control unit；The charhing unit of programmable logic controller respectively with double test loop
It is connected with discharge cell；Miniature processing unit passes through photoelectric isolation module, high pressure trigger module and double test loop respectively
Switch be connected；Current sensor of the oscillograph respectively with double test loop is connected, and the measurement data of oscillograph passes through
Wireless network is uploaded to main control unit.
2. square wave current ripple as claimed in claim 1 triggers the test device of lower OPGW thunderbolt effect, its
It is characterised by, the first described thunder and lightning flow component is to apply diffusing of the simulation thunder-strike current in thunderbolt attachment point, energy to test item
It is enough that effect gap breakdown is turned on and the second thunder and lightning flow component can effectively be triggered injection；
Second thunder and lightning flow component is the substantially invariable DC current of output voltage.
3. square wave current ripple as claimed in claim 1 triggers test device and the side of lower OPGW thunderbolt effect
Method, it is characterised in that the first described test loop includes charging resistor, a termination high direct voltage direct current of charging resistor
Source, the other end is connected with the first chain storage capacitor C1 and the first chain formation inductance L1 one end；First chain formation inductance L1's is another
One end and the second chain storage capacitor C2 and the second chain formation inductance L2 are connected, the N-1 chains formation inductance LN-1 other end with
N chain storage capacitor CN and N chains formation inductance LN one end connection, the N chains formation inductance LN other end and main switch
One end is electrically connected, and the other end of main switch and one end of build-out resistor are connected, and the other end of build-out resistor is with coupling/decoupling net
The Single port connection of network, the other end of the first chain to N chain storage capacitors is connected and is connected to one end of measurement sensor, measures
Also one end ground connection of sensor；
Second test loop includes the transformer of input termination 380V power supplies, the output termination full-bridge rectification mould of transformer
Block, the high-pressure side of the output of full-bridge rectification module and one end of smoothing reactor are connected, and another termination master of smoothing reactor opens
One end of pass, another termination second of main switch couples/decoupling network DCN one end, the low pressure of the output of full-bridge rectification module
The second current metering sensor is terminated, one end of the second current metering sensor is also grounded；
First coupling/decoupling network DCN, the second coupling/decoupling network DCN other end link together, and with acting on gap
One end connection, act on gap another termination optical fiber composite overhead cable one end, optical fiber composite overhead cable the other end
Ground connection.
4. square wave current ripple as claimed in claim 1 triggers the test device of lower OPGW thunderbolt effect, its
It is characterised by, described the first coupling/decoupling network DCN ensures accurate application of the first thunder and lightning flow component to test item, prevents
Second thunder and lightning flow component is poured into the energy of the first test loop；It is made up of discharging gap, electric capacity, resistance or its combination；
The second described coupling/decoupling network DCN ensures accurate application of the second thunder and lightning flow component to test item, prevents the first thunder
Electromagnetic interference and destruction of the current component to the second test loop；It is low pass filter or inverse direction filter.
5. square wave current ripple as claimed in claim 1 triggers the test device of lower OPGW thunderbolt effect, its
It is characterised by, described management system of measurement and control controls the time sequence parameter of double test loop by main control unit, and it includes：
The distance between discharge voltage, main switch ball discharge gap in first test loop；And first test loop, second survey
Try the time interval acted between moment, double lightning current generating loop in loop；
Main control unit also carries out the setting of following parameter：The on/off of charhing unit in double lightning current generating loop, fill
Emergent stopping in the electric discharge of the raise/lower, test loop of piezoelectric voltage and process of the test.
6. square wave current ripple as claimed in claim 1 triggers the test device of lower OPGW thunderbolt effect, its
It is characterised by, described programmable logic controller carries out the SECO of test model after reception control unit instruction
Perform：
1. in the first test loop charhing unit control, the lifting/lowering of on/off, high pressure comprising high pressure；
2. the adjustment and control of the discharge switch in the first test loop, include the adjustment of the clearance distance of main switch so that main
The clearance distance of switch is adjusted with the change of preset discharge voltage；
3. the manually and automatically control of the main switch in the first test loop, the energy of initial storage can pass through multichain waveform formation
Component discharges, and produces the square wave lightning current component waveform with certain duration of desired design；
4. the safety relief control of the storage capacitor in the first test loop, when system operation breaks down or stops testing
When, the energy of electromagnetic field on storage capacitor element must all release；
5. the input of the second test loop/excision control.
7. square wave current ripple as claimed in claim 1 triggers the test device of lower OPGW thunderbolt effect, its
It is characterised by, the control of described miniature processing unit includes：
1. in the first test loop main switch accurate control；
2. between the first test loop, the second test loop sequential accurate control；
3. the input of the second test loop and excision control.
8. square wave current ripple as claimed in claim 1 triggers the test device of lower OPGW thunderbolt effect, its
It is characterised by, the control of described measuring unit is：
The test parameters related to measurement is set by main control unit, including the first current sensor, the second current sensor
Scale factor, the work side of the first lightning current component amplitude desired value, the second lightning current component amplitude desired value and oscillograph
Formula；
First thunder and lightning flow component, the current waveform of the second thunder and lightning flow component are passed by the first current sensor, the second electric current respectively
Sensor is extracted and is input in oscillograph, after main control unit receives the electric discharge instruction of thunder and lightning flow component generating loop, master control list
Member reads the measured waveform data of oscillograph, carries out analysis and the screen display of test data.
9. square wave current ripple described in claim 1 triggers the thunderbolt effect of the test device of lower OPGW thunderbolt effect
Answer test method, it is characterised in that including following operation：
1) started shooting after test item connection is ready, set the double thunderbolt direct effect of OPGW to try by main control unit
The SECO parameter tested, and all control parameters are transmitted to miniature processing unit；
2) charging voltage, discharge voltage and the first lightning current for setting the first test loop by main control unit trigger component
The clearance distance that main discharge is switched in generating loop, programmable logic controller is adjusted according to the size of the discharge voltage of setting
Switch electrode distance；
3) charge power supply is connected, the first test loop of the effect test that is struck by lightning to OPGW charges, when micro-
The charging voltage that type processing unit detects the first test loop storage capacitor is all higher than or equal to the discharge voltage pre-set
When, miniature processing unit will export first control pulse；
4) miniature first control signal of processing unit is output to optically isolated module, and it is high to be output to the first via by optically isolated module
Trigger module control end is pressed, controls it to act and exports control pulse all the way to the trigger circuit of the main switch of the first test loop
In, trigger circuit works and makes the main switch triggering and conducting of the first test loop；
5) from miniature control process unit receives first control signal output, miniature processing unit enters definition status,
It is micro- when timing meets the SECO parameter between the first thunder and lightning flow component pre-set and the second thunder and lightning flow component
Type processing unit exports second control signal, and the second tunnel trigger control module control end, control are reached by optically isolated module
Simultaneously output control signal closes the switch of the second test loop for second tunnel control module action, and the second thunder and lightning flow component is applied to
On test item；When the switch-closed time of the second test loop meets the action time of the second thunder and lightning flow component set in advance
When, miniature processing unit output control signal makes switching off for the second test loop generating loop；So that the first thunder and lightning flow point
Amount, the second thunder and lightning flow component just successively, continual be applied on tested object OPGW；
6) testing result is extracted and is input in oscillograph by the first current sensor, the second current sensor, and main control unit is read
The measured waveform data of oscillograph, carry out analysis and the screen display of test data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710488400.5A CN107271846B (en) | 2017-06-23 | 2017-06-23 | Device and method for testing lightning stroke effect of optical fiber composite overhead ground wire under initiation of square wave current wave |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710488400.5A CN107271846B (en) | 2017-06-23 | 2017-06-23 | Device and method for testing lightning stroke effect of optical fiber composite overhead ground wire under initiation of square wave current wave |
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| CN107271846B (en) | 2021-07-06 |
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