CN105510774B - The solid liquid interface discharge mode method of discrimination that a kind of high-voltage pulse solid material crushes - Google Patents
The solid liquid interface discharge mode method of discrimination that a kind of high-voltage pulse solid material crushes Download PDFInfo
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- CN105510774B CN105510774B CN201510812411.5A CN201510812411A CN105510774B CN 105510774 B CN105510774 B CN 105510774B CN 201510812411 A CN201510812411 A CN 201510812411A CN 105510774 B CN105510774 B CN 105510774B
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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
Abstract
The invention discloses the solid liquid interface discharge mode method of discrimination that a kind of high-voltage pulse solid material crushes, high-voltage pulse breakdown test is carried out to liquid insulating medium first, high-voltage pulse breakdown test is carried out to solid dielectric in respective liquid environment again, obtain electrode both ends load voltage current waveform data, feature extraction is carried out further according to breakdown process voltage breakdown time delay and breakdown process resistance decrement coefficient, obtains two independent characteristics by data processing and carry out sizes comparing differentiation and export differentiation result.The solid liquid interface discharge mode method of discrimination that the high-voltage pulse solid material of the present invention crushes solves the difficult point for differentiating that pulse crushes discharge mode, and differentiation is accurate and effective, to improving solid puncture probability and crushing efficiency, reduces negative effect and plays an important roll.
Description
Technical field
The invention belongs to electrion solid material crushing technology field, more particularly to a kind of high-voltage pulse solid material
Broken solid liquid interface discharge mode method of discrimination.
Background technology
High pressure pulse discharge breaking solid material technology solid material original form can be maintained with it and broken advantage most
It just applies in the broken of lunar rock sample.By the development of many decades, start to be applied in Russia, the U.S., Germany
Produce reality.It is broken that the field applied is oil drilling, stone material is cut, building surface is removed, high-purity material is pollution-free
Broken and calculosis crushes.
However solid puncture belongs to statistical probability event, can be improved in solid dielectric by adjusting pulse electric parameter
The probability of portion's disruptive discharge.Shattering process it is expected in solid dielectric internal discharge, but in practical application, because of solid liquid interface bumps not
It is flat, it is random and uncontrollable, reduce the probability in solid dielectric internal discharge.This is just needed during working continuously, in real time
The voltage current waveform under each impulse action is monitored, judges its discharge mode, to correct the electric parameter for applying high-voltage pulse,
Reach and the probability of solid dielectric internal discharge pattern is controlled into the requirement in higher level to ensure that operating efficiency maximizes, and
Energy consumption and the engineer application demand minimized to the negative effect of surrounding medium, and differentiate at this stage in solid liquid interface discharge mode
Upper no accurate and effective method.
Invention content
The present invention the object of the present invention is to provide a kind of using pulsed discharge in order to overcome the shortcomings of the prior art, adopted
The load voltage current data waveform collected, extraction relevant feature parameters carry out the differentiation of solid liquid interface discharge mode, accurately
And effective, the method for discrimination of solid liquid interface discharge mode that high-voltage pulse solid material crushes.
The adopted technical solution is that a kind of solid liquid interface electric discharge mould that high-voltage pulse solid material crushes
Formula method of discrimination, includes the following steps：
Step 1：To liquid insulating medium carry out high-voltage pulse disruptive discharge, then to solid liquid interface in respective liquid environment into
Horizontal high voltage pulse breakdown discharges；
Step 2：Obtain liquid insulating medium and the electrode both ends load voltage and electric current of solid liquid interface；
Step 3：Voltage waveform and current waveform are handled, respectively extracting liq dielectric and solid liquid interface breakdown
Voltage maintains the maximum value period in the process, forms nonparametric feature；
Step 4：Voltage waveform and current waveform are handled, obtain liquid insulating medium and solid liquid interface breakdown respectively
Process resistance change curves form parameter attribute；
Step 5：The parameter attribute that the nonparametric feature that step 3 is formed is formed with step 4 is for data processing, obtains totally two
A independent characteristic is compared differentiation as differentiation feature；
Step 6：Differentiate that output differentiates result according to the discharge mode of step 5：Liquid medium internal discharge or solid dielectric
Internal discharge.
Step 1 solid dielectric is non-conducting material, and solid liquid interface breakdown is using liquid as in dielectric environment
Punctured in solid liquid interface.
The step 2 refers under identical electrodes spacing, same liquid medium, same solid ambient condition, obtains respectively
The voltage waveform and current waveform of electrode both ends load.
The nonparametric feature of the step 3 includes voltage breakdown time delay tRQ-vWith electric current breakdown time delay tsO-i；During voltage breakdown
The t prolongedRQ-vComputational methods be：Skyrocketing for voltage waveform is a little denoted as the initial time t of discharge breakdown0-vi, recording voltage skyrockets
Voltage to maximum value skyrockets moment tvQ-vAnd voltage starts the voltage dropped suddenly and drops moment t suddenlyvR-v, voltage is dropped to moment t suddenlyvQ-v
Voltage is subtracted to skyrocket moment tvQ-vObtain voltage breakdown time delay tRQ-v；Correspondingly, electric current breakdown time delay tRQ-iComputational methods be：
Skyrocketing for voltage waveform is a little denoted as the initial time t of discharge breakdown0-vi, the electric current of current waveform is skyrocketed, and it is steep to be a little denoted as electric current
Rise moment tvS-i, electric current is skyrocketed moment tvS-iSubtract initial time t0-viObtain electric current breakdown time delay tSO-i, voltage breakdown time delay
tRQ-vWith electric current breakdown time delay tSO-iCorresponding, numerical values recited is equal.
The computational methods of the step 4 are：Record current waveform skyrockets to the current maxima moment t of maximum valuevA-i, will
The voltage value divided by electric current that step 2 obtains are worth to each data point resistance value, are skyrocketed moment t with the electric current of current waveformvS-i
For starting point, current maxima moment tvA-iFor terminal, t is extractedvA-iAnd tvA-iThe resistance value of period and each resistance value are corresponding
Moment point draws resistance change curves, then carries out Mathematical Fitting to the resistance change curves of drafting, obtains resistance decrement coefficient.
The nonparametric feature of the step 3 includes liquid breakdown time delay and solid-liquid breakdown time delay；The parameter attribute of step 4
Including liquid resistance attenuation coefficient and solid-liquid resistance to sparking attenuation coefficient.
The comparison of the step 5, which differentiates, to be included, according to the liquid breakdown time delay of acquisition and solid-liquid breakdown time delay, the two being made
Division arithmetic obtains independent characteristic 1, will obtain compared with independent characteristic 1 makees size with δ, if independent characteristic 1 is at least 2 times bigger than δ,
Then solid liquid interface electric discharge is solid dielectric internal discharge, is otherwise liquid medium internal discharge；According to the liquid breakdown of acquisition electricity
Attenuation coefficient and solid-liquid discharge breakdown resistance decrement coefficient are hindered, the two is made into division arithmetic, obtains independent characteristic 2, by what is obtained
Compared with independent characteristic 2 makees size with ε, if at least one order of magnitude bigger than ε of independent characteristic 2, solid liquid interface electric discharge is situated between for solid
Otherwise matter internal discharge is liquid medium internal discharge, wherein δ, ε is the constant more than 1, and specific size is situated between according to liquid
Matter, solid dielectric, electrode spacing, pulse voltage amplitude are determined.
Compared with prior art, the advantageous effect of present invention is that：The present invention is collected negative using pulsed discharge
Voltage and current data waveform is carried, extraction relevant feature parameters carry out the differentiation of solid liquid interface discharge mode, solve to differentiate that pulse is broken
The difficult point of broken discharge mode, and differentiate accurate and effective.
Description of the drawings
Fig. 1 is solid-liquid breakdown voltage current waveform schematic diagram used in the present invention；
Fig. 2 is the flow diagram of discharge mode method of discrimination of the present invention；
Fig. 3 is resistance decrement Coefficient Fitting schematic diagram in the present invention.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings
As shown in Figures 1 and 2, the solid liquid interface discharge mode method of discrimination that a kind of high voltage pulse solid material crushes,
Include the following steps：
Step 1：To liquid insulating medium carry out high-voltage pulse disruptive discharge, then to solid liquid interface in respective liquid environment into
Horizontal high voltage pulse breakdown discharges；
Step 2：Obtain liquid insulating medium as shown in Figure 1 and the electrode both ends load voltage and electric current of solid liquid interface；
Step 3：Voltage waveform and current waveform are handled, respectively extracting liq dielectric and solid liquid interface breakdown
Voltage maintains the maximum value period in the process, forms nonparametric feature；
Step 4：Voltage waveform and current waveform are handled, obtain liquid insulating medium and solid liquid interface breakdown respectively
Process resistance change curves form parameter attribute；
Step 5：The parameter attribute that the nonparametric feature that step 3 is formed is formed with step 4 is for data processing, obtains totally two
A independent characteristic is compared differentiation as differentiation feature；
Step 6：Differentiate that output differentiates result according to the discharge mode of step 5：Liquid medium internal discharge or solid dielectric
Internal discharge.
As shown in Figure 1, record has liquid medium breakdown voltage waveform 1-1 in figure；Solid dielectric breakdown voltage waveform 1-2；
Liquid medium breakdown current waveform 1-3；Solid dielectric breakdown current waveform 1-4, the illustrative graph point by taking curve 1-2 and 1-4 as an example
Recording mode：Voltage skyrockets and is a little denoted as voltage and current leading zero's O, and voltage skyrockets is denoted as Q to maximum of points, and voltage is with maximum value
Continue to R points, start voltage later and drop suddenly, the steep inflection point that drops is P, and corresponding to electric current S points, hereafter voltage current waveform enters to owe to hinder
Buddhist nun's oscillation phase, the peak-to-peak value point of current waveform are respectively defined as ABCDEF.
Skyrocketing for voltage waveform is a little denoted as the initial time t of discharge breakdown0-vi, recording voltage skyrockets to the electricity of maximum value
Press the moment t that skyrocketsvQ-vAnd voltage starts the voltage dropped suddenly and drops moment t suddenlyvR-v, voltage is dropped to moment t suddenlyvQ-vVoltage is subtracted to skyrocket
Moment tvQ-vObtain voltage breakdown time delay tRQ-v；The electric current of current waveform is skyrocketed and is a little denoted as electric current and skyrockets moment tvS-i, by electric current
Skyrocket moment tvS-iSubtract initial time t0-viObtain electric current breakdown time delay tSO-i, voltage breakdown time delay tRQ-vWhen puncturing with electric current
Prolong tSO-iCorresponding, numerical values recited is equal.
The computational methods of step 4 are：Record current waveform skyrockets to the current maxima moment t of maximum valuevA-i, by step
Two obtained voltage values divided by electric current are worth to each data point resistance value, are skyrocketed moment t with the electric current of current waveformvS-iTo rise
Point, current maxima moment tvA-iFor terminal, t is extractedvA-iAnd tvA-iAt the time of the resistance value of period and each resistance value correspond to
Point draws resistance change curves, then carries out Mathematical Fitting to the resistance change curves of drafting, obtains resistance decrement coefficient.
As shown in Figure 1, curve 1-2 and curve 1-4 data are made division arithmetic, each instantaneous resistance value is obtained, extracts tvA-i
And tvA-iThe resistance value of period and the corresponding moment point of each resistance value, i.e.,：SA sections of resistance, carry out Mathematical Fitting, and fitting is bent
(3-1 is resistance source curve to line, and 3-2 is matched curve, 3-1 and the abscissa numerical value of 3-2 and source waveform very coordinate as shown in Figure 3
It is identical), obtain resistance decrement factor beta.
The present invention is using the high pressure pulse discharge load terminal voltage waveform and current waveform of acquisition, is carried out on this basis
Correlated characteristic extraction carries out solid liquid interface discharge mode differentiation, when nonparametric feature includes liquid breakdown time delay with solid-liquid breakdown
Prolong；Parameter attribute includes liquid resistance attenuation coefficient and solid-liquid resistance to sparking attenuation coefficient.Wherein compare method of discrimination to include, root
According to the liquid breakdown time delay of acquisition and solid-liquid breakdown time delay, the two is made into division arithmetic, obtains independent characteristic 1, independence will be obtained
Compared with feature 1 makees size with δ, if independent characteristic 1 is at least 2 times bigger than δ, solid liquid interface electric discharge is solid dielectric internal discharge,
Otherwise it is liquid medium internal discharge；According to the liquid breakdown resistance decrement coefficient of acquisition and solid-liquid discharge breakdown resistance decrement system
Number, makees division arithmetic by the two, obtains independent characteristic 2, compared with obtained independent characteristic 2 is made size with ε, if independent characteristic 2
At least one order of magnitude bigger than ε, then solid liquid interface electric discharge is solid dielectric internal discharge, is otherwise liquid medium internal discharge,
Wherein δ, ε is the constant more than 1, specific size according to liquid medium, solid dielectric, electrode spacing, pulse voltage amplitude into
Row determines.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (4)
1. the solid liquid interface discharge mode method of discrimination that a kind of high-voltage pulse solid material crushes, it is characterised in that including following step
Suddenly：
Step 1：High-voltage pulse disruptive discharge is carried out to liquid insulating medium, then solid liquid interface in respective liquid environment is carried out high
Press pulse breakdown electric discharge；
Step 2：Obtain liquid insulating medium and the electrode both ends load voltage and electric current of solid liquid interface；
Step 3：Voltage waveform and current waveform are handled, respectively extracting liq dielectric and solid liquid interface breakdown process
Middle voltage maintains the maximum value period, forms nonparametric feature；
Step 4：Waveform is handled, obtains liquid insulating medium and solid liquid interface breakdown process resistance change curves respectively,
Form parameter attribute；
Step 5：The parameter attribute that the nonparametric feature that step 3 is formed is formed with step 4 is for data processing, obtain totally two solely
Vertical feature is compared differentiation as differentiation feature；
Step 6：Differentiate that output differentiates result according to the discharge mode of step 5:Inside liquid medium internal discharge or solid dielectric
Electric discharge；
The nonparametric feature of step 3 includes liquid breakdown time delay and solid-liquid breakdown time delay；The parameter attribute of step 4 includes liquid electric
Hinder attenuation coefficient and solid-liquid resistance to sparking attenuation coefficient；
The comparison of the step 5, which differentiates, to be included, according to the liquid breakdown time delay of acquisition and solid-liquid breakdown time delay, the two being made division
Operation obtains independent characteristic 1, will obtain compared with independent characteristic 1 makees size with δ, if independent characteristic 1 is at least 2 times bigger than δ, Gu
The electric discharge of liquid interface is solid dielectric internal discharge, is otherwise liquid medium internal discharge；It is declined according to the liquid breakdown resistance of acquisition
Subtract coefficient and solid-liquid discharge breakdown resistance decrement coefficient, the two is made into division arithmetic, obtains independent characteristic 2, the independence that will be obtained
Compared with feature 2 makees size with ε, if at least one order of magnitude bigger than ε of independent characteristic 2, solid liquid interface electric discharge is in solid dielectric
Portion discharges, and is otherwise liquid medium internal discharge, and wherein δ, ε is the constant more than 1, and specific size is according to liquid medium, solid
Body medium, electrode spacing, pulse voltage amplitude are determined.
2. the solid liquid interface discharge mode method of discrimination that a kind of high-voltage pulse solid material according to claim 1 crushes,
It is characterized in that：The step 2 refers under identical electrodes spacing, same liquid medium, same solid ambient condition, obtains respectively
Obtain the voltage waveform and current waveform of electrode both ends load.
3. the solid liquid interface discharge mode method of discrimination that a kind of high-voltage pulse solid material according to claim 1 crushes,
It is characterized in that：The nonparametric feature of the step 3 includes voltage breakdown time delay tRQ-vWith electric current breakdown time delay tSO-i；Voltage is hit
Wear the t of time delayRQ-vComputational methods be：Skyrocketing for voltage waveform is a little denoted as the initial time t of discharge breakdown0-vi, recording voltage
The voltage to skyrocket to maximum value skyrockets moment tvQ-vAnd voltage starts the voltage dropped suddenly and drops moment t suddenlyvR-v, the moment is dropped into voltage suddenly
tvQ-vVoltage is subtracted to skyrocket moment tvQ-vObtain voltage breakdown time delay tRQ-v；Correspondingly, electric current breakdown time delay tRQ-iComputational methods
It is：Skyrocketing for voltage waveform is a little denoted as the initial time t of discharge breakdown0-vi, the electric current of current waveform is skyrocketed and is a little denoted as electricity
Stream skyrockets moment tvS-i, electric current is skyrocketed moment tvS-iSubtract initial time t0-viObtain electric current breakdown time delay tSO-i, voltage breakdown
Time delay tRQ-vWith electric current breakdown time delay tSO-iCorresponding, numerical values recited is equal.
4. the solid liquid interface discharge mode method of discrimination that a kind of high-voltage pulse solid material according to claim 1 crushes,
It is characterized in that：The computational methods of the step 4 are：Record current waveform skyrocketed to the current maxima moment of maximum value
tvA-i, voltage value divided by electric current that step 2 is obtained are worth to each data point resistance value, when being skyrocketed with the electric current of current waveform
Carve tvS-iFor starting point, current maxima moment tvA-iFor terminal, t is extractedvA-iAnd tvA-iThe resistance value of period and each resistance value
Corresponding moment point draws resistance change curves, then carries out Mathematical Fitting to the resistance change curves of drafting, obtains resistance decrement
Coefficient.
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| 高压脉冲发生器碎石研究;张大伟 等;《中国科技信息》;20131201(第23期);第140-142页 * |
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