CN107290625A - Double Exponential current ripples trigger the test device and method of lower OPGW thunderbolt effect - Google Patents
Double Exponential current ripples trigger the test device and method of lower OPGW thunderbolt effect Download PDFInfo
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- CN107290625A CN107290625A CN201710488397.7A CN201710488397A CN107290625A CN 107290625 A CN107290625 A CN 107290625A CN 201710488397 A CN201710488397 A CN 201710488397A CN 107290625 A CN107290625 A CN 107290625A
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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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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Abstract
The invention discloses the test device and method that double Exponential current ripples trigger lower OPGW thunderbolt effect, test item optical fiber compound ground cable is connected with the double test loop being connected in parallel between management system of measurement and control respectively by acting on gap；First test loop is more than the first pair of exponential wave thunder and lightning flow component of 100kV, the quantity of electric charge not less than 10C, average peak current not less than 2kA, 1~5ms of duration to gap output voltage is acted on, 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 effect gap.Double Exponential current ripples of the invention using with operating voltage height and with certain continuous discharging time are used as initiation pulse, test item OPGW with certain interval distance can be punctured and turned it on, because the first thunder and lightning flow component has certain current amplitude and duration, because enabling the second thunder and lightning flow component successfully to inject, thunderbolt effect of the true actual thunderbolt of simulation to OPGW.
Description
Technical field
The invention belongs to direct effect experimental technique field of being struck by lightning, it is related to double Exponential current ripples and triggers lower optical fiber composite overhead
The test device and method of ground wire 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 double Exponential current ripples triggers lower OPGW thunderbolt effect
Test device and method, overcome the unreasonable part of current OPGW thunderbolts direct effect test method, being capable of accurate simulation reality
Shock effect, electromagnetism stress effect and the fuel factor being struck by lightning to OPGW generations.
The present invention is to be achieved through the following technical solutions：
Double Exponential current ripples trigger the test device of lower OPGW thunderbolt effect, the compound ground of test item optical fiber
Cable is connected with the double 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 to effect gap output voltage and is not less than 10C, average peak current
Not less than 2kA, 1~5ms of duration first pair of exponential wave thunder and lightning flow component, it includes being sequentially connected the first lightning current connect
Generating loop, the first coupling/decoupling network DCN and the first current sensor；First lightning current generating loop include charhing unit,
Discharge cell and waveform formation unit；
Second test loop is to when acting on gap 100~400A of output DC current amplitude, 50~200C of the quantity of electric charge, continuing
Between 0.25~0.5s the second thunder and lightning flow component, it includes being sequentially connected the second lightning current generating loop connect, second couples/go
Coupling network DCN and the second current sensor；Second lightning current generating loop includes charhing unit, discharge cell and waveform formation list
Member；
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 connected 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 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, storage capacitor, forms inductance, main switch and Crowbar switches,
One termination high direct voltage dc source of charging resistor, other end one end respectively with storage capacitor, main switch one end it is electric
Connection；The other end of main switch is connected with forming one end of inductance, one end of Crowbar switches；Formed inductance the other end with
The Single port connection of first coupling/decoupling network, the other end of storage capacitor is connected with the Crowbar other ends switched, and with
One end of first current sensor measurement is connected, and one end of the first current sensor measurement is also 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 waveform formation
Component (formation inductance, formation resistance in the test loop) release, produces the lightning current component waveform of desired design；
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. the accurate control for sequential of being discharged in the first test loop between main switch and Crowbar switches；
2. between the first test loop, the second test loop sequential accurate control；
3. 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.
Described pair of Exponential current ripple triggers the thunderbolt effect examination of the test device of lower OPGW thunderbolt effect
Proved recipe method, it is characterised in that 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；
From miniature control process unit receives first control signal output, miniature processing unit enters timing shape
State, joins when timing meets the SECO between the main switch of the first test loop pre-set and Crowbar switches
During number, miniature processing unit exports second control signal, and reaching the second tunnel high pressure trigger module by optically isolated module controls
End, the second tunnel high pressure trigger module of control acts and exports what control pulse all the way was switched to the Crowbar of the first test loop
In trigger circuit, trigger circuit works and turns on the Crowbar switch triggerings of the first test loop；
5) when timing meets the sequential control between the first thunder and lightning flow component pre-set and the second thunder and lightning flow component
During parameter processed, miniature processing unit exports the 3rd control signal, and the 3rd tunnel trigger control module is reached by optically isolated module
Control end, simultaneously output control signal closes the switch of the second test loop to the tunnel control module action of control the 3rd, the second thunder and lightning
Flow component is applied on test item；When the switch-closed time of the second test loop meets the second thunder and lightning flow component set in advance
Action time when, miniature processing unit output control signal makes switching off for the second test loop generating loop；So that the
One thunder and lightning flow component, the second thunder and lightning flow component just successively, continual be applied on tested object OPGW；
7) 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 electric discharge before double exponential wave thunder and lightning flow component injection of low pressure long duration
Voltage height, duration length, the lightning current with large energy trigger the test method of component, can be to the OPGW with gap
Test product carries out thunderbolt effect test, shock effect, electromagnetism stress effect and fuel factor that accurate simulation thunderbolt is produced to OPGW.This
The OPGW thunderbolt effect tests of invention include the first lightning current and trigger component and the second thunder and lightning flow component.First thunder and lightning flow component is sent out
The nominal discharge voltage in raw loop is generally 100kV or so or higher, can relatively accurately simulate thunder-strike current attached in thunderbolt
Diffusing a little；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 0.5s
It is interior adjustable.
First thunder and lightning flow component of the OPGW thunderbolt effect tests of the present invention is used with coupling/decoupling network DCN
Crowbar loops, coupling/decoupling network DCN ensures the first thunder and lightning flow component to the accurate application of test item and to the second thunder
Effective suppression and isolation that current component is carried out；OPGW thunderbolt effect test the second thunder and lightning flow component be with second coupling/
The low-voltage direct big current loop of decoupling network, the output of DC current, second are realized by the peaceful ripple inductor of three phase rectifier
The effect of coupling/decoupling network is to ensure that the second thunder and lightning flow component to the accurate application of test item and suppresses the first thunder and lightning flow point
The electromagnetic interference of amount and destruction.
The control of the OPGW thunderbolt effect tests of the present invention, can using main control unit and programmable logic controller realization
Opened with the control for realizing the discharge switch in the first test loop between main switch and Crowbar switches, in the second test loop
Time interval presetting and accurately controlling between pass and the first 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
Double Exponential current ripples of amplitude/energy are flowed as pulse is triggered, and the test item OPGW with certain interval distance can be punctured
Turn it on, because the first thunder and lightning flow component has certain current amplitude and duration, because so that the second thunder and lightning flow point
Amount can successfully be injected, thunderbolt effect of the true actual thunderbolt of simulation to OPGW.
Brief description of the drawings
Fig. 1 triggers the knot of the test device of lower OPGW thunderbolt effect for double Exponential current ripples of the present invention
Structure block diagram.
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, the double continuous sequential experimental rig of the OPGW thunderbolt effect of the invention provided, 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
Or the higher, duration typically in 1-5ms, can will effect gap breakdown conducting and can by the second thunder and lightning flow component successfully
Trigger injection；The main function of low pressure long duration thunder and lightning flow-generator is to provide big energy or big electric charge biography for test item
Throughput rate；
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 are double Exponential current ripples of certain continuous discharging time and current amplitude/energy as initiation pulse, between can carrying necessarily
Stand-off distance from test item OPGW puncture and turn it on, because the first lightning current triggers component to have certain current amplitude and continue
Time, 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, formed inductance, main switch, Crowbar switch, is formed resistance and measurement sensing
Device is constituted.Second test loop by by alternating voltage carry out full-bridge rectification, Ping Bo and obtain that load capacity is strong, output voltage base
This constant dc source.
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
Press dc source, one end electrical connection of one end and main switch of the other end and storage capacitor, the other end of main switch and formation
One end of inductance is connected with switch crowbar one end, and the other end for forming inductance is connected with forming one end of resistance, is formed
The other end of resistance is connected with the Single port of coupling/decoupling network, the other end of the other end and the crowbar switch of storage capacitor
It is connected and is connected to one end of current sensor measurement, the other end ground connection of current sensor measurement；If measurement sensor is
Electromagnetic induction type, measurement sensor is directly sleeved on the other end of storage capacitor to the line being 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 maximum discharge current is generally at least
5kA-20kA, average discharge current is generally 2kA, and the duration is not less than 1-5ms；The second thunder and lightning of long duration flow component is sent out
Raw loop is a long-term DC current source, and its current amplitude, the quantity of electric charge and duration meet DC current width
It is adjustable in value 100-400A (adjustable), quantity of electric charge 50-200C (adjustable), duration 0.5s.
First thunder and lightning flow component generating loop (double index wave component generating loops) has discharge voltage height, discharge current big
The characteristics of, during the application of primary power can be carried out to the OPGW with certain effect gap and is ensured subsequently
Between the second thunder and lightning flow component be efficiently injected into；First lightning current triggers the nominal discharge voltage of component generating loop to be generally
100kV or so or higher, can relatively accurately simulate diffusing of the thunder-strike current in thunderbolt attachment point；The thunder of long duration second
Current component generating loop is a long-term DC current source, and its current amplitude, the quantity of electric charge and duration meet
It is adjustable in DC current amplitude 100-400A (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. carry out OPGW thunderbolt effect test the first thunder and lightning flow component generating loop in main switch with
The accurate control for sequential of being discharged between Crowbar switches；
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；
From miniature control process unit receives first control signal output, miniature processing unit enters timing shape
State, joins when timing meets the SECO between the main switch of the first test loop pre-set and Crowbar switches
During number, miniature processing unit exports second control signal, and reaching the second tunnel high pressure trigger module by optically isolated module controls
End, the second tunnel high pressure trigger module of control acts and exports what control pulse all the way was switched to the Crowbar of the first test loop
In trigger circuit, trigger circuit works and turns on the Crowbar switch triggerings of the first test loop；
5) when timing meets the sequential control between the first thunder and lightning flow component pre-set and the second thunder and lightning flow component
During parameter processed, miniature processing unit exports the 3rd control signal, and the 3rd tunnel trigger control module is reached by optically isolated module
Control end, simultaneously output control signal closes the switch of the second test loop to the tunnel control module action of control the 3rd, the second thunder and lightning
Flow component is applied on test item；When the switch-closed time of the second test loop meets the second thunder and lightning flow component set in advance
Action time when, miniature processing unit output control signal makes switching off for the second test loop generating loop；So that the
One thunder and lightning flow component, the second thunder and lightning flow component just successively, continual be applied on tested object OPGW；
7) 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. pair Exponential current ripple triggers the test device of lower OPGW thunderbolt effect, it is characterised in that 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 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 of double exponential waveforms, 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 double exponential waveforms 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 oscillograph, the current sensor being associated with main control unit；Programmable logic controller is returned with double test respectively
The charhing unit on road is connected with discharge cell；Miniature processing unit respectively by photoelectric isolation module, high pressure trigger module with
The switch of double test loop is connected；Current sensor of the oscillograph respectively with double test loop is connected, oscillograph
Measurement data is uploaded to main control unit by wireless network.
2. double Exponential current ripples as claimed in claim 1 trigger the test device of lower OPGW thunderbolt effect,
Characterized in that, the first described thunder and lightning flow component is to apply accurate simulation thunder-strike current to test item in thunderbolt attachment point
Diffusing, effect gap breakdown can be turned on and the second thunder and lightning flow component can effectively be triggered into injection；
Second thunder and lightning flow component is the substantially invariable DC current of output voltage.
3. double Exponential current ripples as claimed in claim 1 trigger the test device of lower OPGW thunderbolt effect,
Opened characterized in that, the first described test loop includes charging resistor, storage capacitor, formation inductance, main switch and Crowbar
Close, a termination high direct voltage dc source of charging resistor, other end one end respectively with storage capacitor, one end electricity of main switch
Gas is connected；The other end of main switch is connected with forming one end of inductance, one end of Crowbar switches；Form the other end of inductance
With formed resistance one end be connected, formation resistance the other end be connected with the Single port of coupling/decoupling network, storage capacitor it is another
One end is connected with the Crowbar other ends switched and is connected to one end of the first current sensor measurement, the first current sensor
One end be also grounded；
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. double Exponential current ripples as claimed in claim 1 trigger the test device of lower OPGW thunderbolt effect,
Characterized in that, the first described coupling/decoupling network DCN ensures accurate application of the first thunder and lightning flow component to test item, prevent
Only the 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. double Exponential current ripples as claimed in claim 1 trigger the test device of lower OPGW thunderbolt effect,
Characterized in that, described management system of measurement and control controls the time sequence parameter of double test loop by main control unit, it includes：
The inter-spike intervals between discharge voltage, main switch and Crowbar switches in first test loop, main switch ball discharge gap
The distance between；And between effect moment of first test loop, the second test loop, double lightning current generating loop when
Between be spaced；
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. double Exponential current ripples as claimed in claim 1 trigger the test device of lower OPGW thunderbolt effect,
Characterized in that, described programmable logic controller carries out the sequential control of test model after reception control unit instruction
System is performed：
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. main switch in the first test loop, the manually and automatically control of CROWBAR switches, the energy of initial storage can pass through
Waveform formation component discharges to load, produces the exponential wave lightning current component waveform 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. double Exponential current ripples as claimed in claim 1 trigger the test device of lower OPGW thunderbolt effect,
Characterized in that, the control of described miniature processing unit includes：
1. the accurate control for sequential of being discharged in the first test loop between main switch and Crowbar switches；
2. between the first test loop, the second test loop sequential accurate control；
3. the input of the second test loop and excision control.
The double continuous sequential experimental rig of effect, its feature 8. OPGW as claimed in claim 1 is struck by lightning
It is, 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. double Exponential current ripples described in claim 1 trigger the thunderbolt of the test device of lower OPGW thunderbolt effect
Effect 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；
From miniature control process unit receives first control signal output, miniature processing unit enters definition status, when
When timing meets the SECO parameter between the main switch of the first test loop pre-set and Crowbar switches,
Miniature processing unit exports second control signal, and the second tunnel high pressure trigger module control end, control are reached by optically isolated module
Make the second tunnel high pressure trigger module and act and export the triggering time that control pulse all the way is switched to the Crowbar of the first test loop
Lu Zhong, trigger circuit works and turns on the Crowbar switch triggerings of the first test loop；
5) join when timing meets the SECO between the first thunder and lightning flow component pre-set and the second thunder and lightning flow component
During number, miniature processing unit exports the 3rd control signal, and reaching the 3rd tunnel trigger control module by optically isolated module controls
End, simultaneously output control signal closes the switch of the second test loop to the tunnel control module action of control the 3rd, the second thunder and lightning flow point
Amount is applied on test item；When the switch-closed time of the second test loop meets the work of the second thunder and lightning flow component set in advance
When using the time, miniature processing unit output control signal makes switching off for the second test loop generating loop；So that the first thunder
Current component, the second thunder and lightning flow component just successively, continual be applied on tested object OPGW；
7) 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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| CN201710488397.7A CN107290625B (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 double-exponential current wave |
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| CN201710488397.7A CN107290625B (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 double-exponential current wave |
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