CN106093576A - A kind of electrolysis bath group insulation against ground resistor detection method and device - Google Patents
A kind of electrolysis bath group insulation against ground resistor detection method and device Download PDFInfo
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- CN106093576A CN106093576A CN201610383962.9A CN201610383962A CN106093576A CN 106093576 A CN106093576 A CN 106093576A CN 201610383962 A CN201610383962 A CN 201610383962A CN 106093576 A CN106093576 A CN 106093576A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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Abstract
The electrolysis bath group insulation against ground resistor detection method of embodiment of the present invention offer and device, for mostly the insulation against ground resistor detection method of the electrolysis bath group of prior art being use circuit tester directly to detect, high voltage due to electrolysis bath group, big heavy current, high-intensity magnetic fields etc. can cause the damage of detection circuit tester or the technical problem that measurement error is bigger, the detection method of the insulation against ground resistance of the electrolysis bath group provided and device, the test resistance of known resistance is connected to described electrolysis bath group, test the full section of electrolysis bath group or the voltage that part groove is intersegmental, test the voltage at test resistance two ends simultaneously, Ohm's law is utilized to draw the insulation against ground resistance of described electrolysis bath group, reach the technique effect of the resistance detection that can be obtained electrolysis bath group insulation against ground resistance by the nondestructive measurement of test circuit related data.
Description
Technical field
The present invention relates to electrolysis bath field, in particular to a kind of electrolysis bath group insulation against ground resistor detection method and
Device.
Background technology
Electrolysis bath group is U-shaped symmetric arrays, can be divided into before and after two sections from tail end, when forward and backward two sections of insulation resistances are sent out
During changing, the parallel equivalent resistance after it simplifies also changes, and its resistance is the most symmetrical, so what computer installation detected
Forward and backward two sections of voltage-to-grounds also will change, and be no longer original symmetrical voltage-to-ground.
Insulation resistance is electric wiring, the important indicator of apparatus insulated performance, varying environment, under the conditions of insulating requirements be
Different, majority of case discussion and consideration insulation against ground resistance.Insulation resistance value under normal circumstances: electrolysis bath group insulation against ground
Resistance should be at more than 1M Ω.Other electric wirings, equipment have the requirement that they are different.When electric wiring or electrical equipment are improper
There occurs grounding phenomenon in the case of ground connection, then this electric wiring, equipment insulation against ground resistance will substantially reduce, consequently, it is possible to lead
Cause the adverse consequencess such as electric, equipment in various degree, personal injury.
Mostly the detection method of the insulation against ground resistance of the electrolysis bath group of prior art is to use circuit tester to detect, due to
Higher about the 1280V of electrolysis bath group voltage, electric current is relatively big, reaches 500KA, and magnetic field is relatively big, directly detects meeting with circuit tester or megger
Burn out instrument, and detection is affected by electrolysis bath, detects data serious distortion.
Summary of the invention
The present invention provides a kind of electrolysis bath group insulation against ground resistor detection method and device, it is intended to improve the problems referred to above.
A kind of electrolysis bath group insulation against ground resistor detection method that the present invention provides, for detecting the most exhausted of electrolysis bath group
Edge resistance, is applied to electrolysis bath group insulation against ground resistor detecting device, and described method includes: obtain zero electricity of described electrolysis bath group
Position electrolysis bath estimate position；Position of estimating according to described zero potential electrolysis bath arranges multiple first test point；According to described
The second test point is chosen in described electrolysis bath group in the position of estimating of zero potential electrolysis bath.Acquisition is connected with described second test point
First voltage at test resistance two ends, wherein said test resistance is away from the other end ground connection of described second test point；Obtain institute
State the second voltage between the second test point and each described first test point.According to described second voltage, described first voltage
With the insulation against ground resistance value that the resistance of described test resistance obtains each described first test point；At described insulation against ground resistance
When value meets predetermined threshold value, it is determined that the first test point meeting the insulation against ground resistance value of predetermined threshold value corresponding is earth point.
Preferably, the step estimating position of the zero potential electrolysis bath of described acquisition described electrolysis bath group, including: obtain institute
State the theoretical voltage-to-ground at bus two ends, electrolysis bath group termination；The reality obtaining bus two ends, described electrolysis bath group termination is the most electric
Pressure.Described theoretical voltage-to-ground and described actual voltage-to-ground according to bus two ends, described electrolysis bath termination obtain described zero electricity
Position electrolysis bath estimate position.
Preferably, the described described theoretical voltage-to-ground according to bus two ends, described electrolysis bath group termination and described reality are right
Ground voltage obtains the step estimating position of zero potential electrolysis bath, including: according to described theoretical voltage-to-ground and electrolysis bath group
Electrolysis bath number obtains the average voltage of each electrolysis bath；Actual voltage-to-ground according to described electrolysis bath group and described electrolysis bath
Average voltage obtain the first numerical value.According to described first numerical value, with the most extremely initial bit of the termination bus of described electrolysis bath
Putting, obtain described zero potential electrolysis bath estimates position.
Preferably, the second test point is chosen in described electrolysis bath group in the described position of estimating according to described zero potential electrolysis bath
Step, including: according to described zero potential electrolysis bath estimate position described electrolysis bath group set second test point connect model
Enclose, wherein, described second test point join domain be described electrolysis bath group termination bus positive best described in zero potential electrolysis bath
The electrolysis bath estimated between position.Choose near the position of described zero potential electrolysis bath at described second test point join domain
Second test point.
Preferably, the described resistance according to described second voltage, described first voltage and described test resistance obtains described
The step of the insulation against ground resistance value of the first test point, including: obtain over the ground according to described second voltage and described first voltage
The tertiary voltage at insulation resistance two ends；Resistance according to described first voltage and described test resistance obtains described first electric current；
Described insulation against ground resistance value is obtained according to described tertiary voltage and described first electric current.
Preferably, described method also includes: resistance and described insulation against ground resistance value according to described test resistance are
The 3rd test point is chosen between two test points and the first test point.Obtain the second electric current of described test resistance, wherein, described
Two electric currents are the electric current that described test resistance connects after the iron plate of described zero potential electrolysis bath.Obtain described second test point with
The 4th voltage between described 3rd test point；Obtain between described 3rd test point and the iron plate of described zero potential electrolysis bath
5th voltage.Obtain the 6th voltage between the iron plate of described second test point and described zero potential electrolysis bath.According to described
Two electric currents, described 4th voltage, described 5th voltage, described 6th voltage and the second predetermined threshold value obtain the electrolysis of described zero potential
The ground state of groove.
A kind of electrolysis bath group insulation against ground resistor detecting device that the present invention provides, for detecting the most exhausted of electrolysis bath group
Edge resistance, described device includes: processor, for obtain described electrolysis bath group zero potential electrolysis bath estimate position, according to
The position of estimating of described zero potential electrolysis bath arranges multiple first test point, according to the position of described zero potential electrolysis bath described
Electrolysis bath chooses the second test point.First voltage check device, for obtaining the test resistance being connected with described second test point
The voltage at two ends, wherein, described test resistance is away from the other end ground connection of described second test point.First voltage check device,
For obtaining the second voltage between described second test point and each described first test point.Described processor is additionally operable to basis
The resistance of described second voltage, described first voltage and described test resistance obtains the insulation against ground of each described first test point
Resistance value, when described insulation against ground resistance value meets predetermined threshold value, it is determined that meet the insulation against ground resistance value pair of predetermined threshold value
The first test point answered is earth point.
Preferably, described device also includes: theoretical voltage-to-ground detection device, is used for obtaining described electrolysis bath group termination female
The theoretical voltage-to-ground at line two ends；Actual voltage-to-ground detection device, for obtaining bus two ends, described electrolysis bath group termination
Actual voltage-to-ground；Described processor specifically for the described theoretical voltage-to-ground according to bus two ends, described electrolysis bath termination and
Described actual voltage-to-ground obtain described zero potential electrolysis bath estimate position.
Preferably, described processor specifically for: according to described theoretical voltage-to-ground and the electrolysis bath number of electrolysis bath group
Obtain the average voltage of each electrolysis bath.Actual voltage-to-ground according to described electrolysis bath group and the average voltage of described electrolysis bath
Obtain the first numerical value.According to described first numerical value, with the most extremely initial position of the termination bus of described electrolysis bath, obtain described
Zero potential electrolysis bath estimate position.
Preferably, described processor is additionally operable to the resistance according to described test resistance and described insulation against ground resistance value
Choosing the 3rd test point between two test points and the first test point, described device also includes: the second current sensing means, is used for obtaining
Taking the second electric current of described test resistance, wherein, described second electric current is that described test resistance connects described zero potential electrolysis bath
Iron plate after electric current.4th voltage check device, is used for obtaining between described second test point and described 3rd test point
The 4th voltage；5th voltage check device, for obtain described 3rd test point and described zero potential electrolysis bath iron plate it
Between the 5th voltage.6th voltage check device, for obtaining the iron plate of described second test point and described zero potential electrolysis bath
Between the 6th voltage；Described processor is additionally operable to according to described second electric current, described 4th voltage, described 5th voltage, institute
State the 6th voltage and the ground state of the second predetermined threshold value described zero potential electrolysis bath of acquisition.
A kind of electrolysis bath group insulation against ground resistor detection method of the invention described above offer and device, for prior art
Mostly the insulation against ground resistor detection method of electrolysis bath group is use circuit tester directly to detect, due to the high electricity of electrolysis bath group
Pressure can cause the technical problem of the damage of detection circuit tester, it is provided that electrolysis bath group insulation against ground resistance detection method and
Device, by the insulation against ground resistant series of the test resistance of known resistance and the electrolysis bath group needing test to the equivalence of electrolysis bath group
Voltage source on, the insulation against ground resistance of described electrolysis bath group can be drawn according to the resistance of test resistance and series connection intrinsic standoff ratio,
Reached by test circuit related data nondestructive measurement can obtain electrolysis bath group insulation against ground resistance resistance detection
Technique effect.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by embodiment required use attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this
A little accompanying drawings obtain other relevant accompanying drawings.
The isoboles of the electrolysis bath group equivalent resistance over the ground that Fig. 1 to 8 provides for present pre-ferred embodiments；
Fig. 9 is the flow chart of steps of the electrolytic cell ground insulating resistor detection method that present pre-ferred embodiments provides；
Figure 10 is the structural representation of the electrolysis bath group insulation against ground resistor detecting device that present pre-ferred embodiments provides；
Figure 11 is the equivalent circuit diagram of the electrolytic cell ground insulating resistor detecting device that present pre-ferred embodiments provides；
Figure 12 is the structural representation of the electrolytic cell ground insulating resistor detecting device that present pre-ferred embodiments provides；
Figure 13 is the module frame chart of the electrolytic cell ground insulating resistor detecting device that present pre-ferred embodiments provides.
Detailed description of the invention
Those skilled in the art are seeking a kind of instrument improving this problem or method the most always.
In consideration of it, the designer of the present invention is by long-term exploration and trial, and experiment repeatedly and effort, constantly
Reform and innovation, draw the electrolysis bath group insulation against ground resistor detection method shown in this programme and device.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.Therefore,
Detailed description to the embodiments of the invention provided in the accompanying drawings is not intended to limit the model of claimed invention below
Enclose, but be merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Refer to Fig. 1 to Fig. 8, for the principle of equal effects of the electrolysis bath group equivalent resistance over the ground that present pre-ferred embodiments provides
Figure.Electrolyzer with electricity by transformer station's rectification room provide unidirectional current, cell line is said and can regard a current source as, to electricity
A voltage source can be regarded as solving the insulation resistance that groove series is in parallel.After electrolysis bath 320 platform that positive electrode bus is concatenated
Flowing back to negative electrode bus, when the electrolysis bath number that described cell line includes is 320, the voltage difference of termination bus is approximately
1280V, averagely every electrolysis bath terminal voltage is approximately 4V.Preferably cell line should be Floating over the ground, insulation against ground
Very big (more than 1M Ω), but in reality, cell line insulation against ground has certain Standard resistance range, the least, example
During such as ground connection, cell resistance is the least.Try to achieve by Ohm's law: R1=U/I=4/500000=0.000008 Ω, 320 trough strings
All-in resistance after connection is 0.00256 Ω, and the equivalent parallel network that insulation against ground resistance and ground resistance and cell resistance form is to whole
What the electric current of individual cell line affect almost without, and cell current is regarded as constant.For insulation resistance in parallel and
For ground resistance (equivalent resistance), voltage is constant.All-in resistance after insulation resistance, ground resistance and cell resistance parallel connection
It is believed that be just approximately equal to cell resistance.
Refer to Fig. 1, for the isoboles of cell line equivalent resistance over the ground in the case of full symmetric.Greatly (in figure
GND, lower same) it is considered as equivalent, but can only there is a fixing detection reference point.By R1With R0And the earth composition series connection and
Connection loop constitutes direct current pressure drop 1280V, and electric current is the electrolysis loop of 500KA.Due to R1Less, then it is approximately considered by R1Constitute
Simple series loop, described zero potential over the ground is in theory at the tail end (in figure, END, lower same) of potroom.
Refer to Fig. 2, for the simplification circuit model of principle of equal effects Fig. 1 of cell line.In the case of full symmetric, greatly
It is considered as isoelectric level body, but during detection, reference point can only be same some position.
Refer to Fig. 3, for the equivalent schematic diagram of cell line.Modeling in the case of circuit is full symmetric, the earth regards
It is body for non-grade, R2For the earth local longitudinal electrical resistance, R3For the earth partial lateral resistance.By R0、R1And R3The series, parallel of composition
Loop constitutes direct current pressure drop 1280V, and electric current is the electrolysis loop of 500KA.
Though preferable electrolysis bath is to suspend over the ground, but still and the earth between there is certain insulating resistance value, simply
Resistance is relatively big, up to more than 1M Ω.All exist certain between the bus of cell line termination between electrolysis bath and the earth of series connection
Insulating resistance value, greatly there is also resistance between the difference position of self, form complex series, parallel between the two
Loop, but a branch resistance and series of grooves resistor coupled in parallel can be equivalent to.Electrolysis bath above earth potential is exactly solid one of the earth
Pinpointing (zero potential) as a reference point, the voltage in equivalent circuit, between itself and this reference point, it is simply that voltage-to-ground, when this
When voltage is zero, we just say that this electrolysis bath is for zero potential electrolysis bath over the ground.The measuring and calculating of computer installation above earth potential: be female with termination
The positive and negative electrode of line carries out voltage measurement to a fixing the earth reference point, and the meansigma methods (4V) then pressing tank voltage calculates gained,
I.e. UN=UPositive pole (voltage-to-ground)-4n.
Refer to Fig. 4, for the equivalent schematic diagram of cell line equivalent resistance over the ground.R1For cell resistance, I is that current source carries
The electric current of confession, RInFor the equivalent resistance of current source, its resistance is relative to R1The biggest.
Refer to Fig. 5, for the equivalent schematic diagram of cell line equivalent resistance over the ground.Wherein, R0For insulation resistance with big
The equivalent resistance that earth resistance is formed.UAcrossFor R0The corresponding voltage between electrolysis bath transboundary.In in R being the equivalence of voltage source
Resistance, resistance is the least relative to R0.
Refer to Fig. 6, for cell line zero potential isoboles over the ground.Ideally, be i.e. full symmetric in the case of
The analysis of electrolysis bath zero potential over the ground.U1-160+U161-320=+640+640=1280V；RInsulation 1-160=RInsulation 161-320；RGroove 1-160
=RGroove 161-320；RInsulation 1-160/RInsulation 161-320=RGroove 1-160/RGroove 161-320.Obtain according to parallel circuit, U+ over the ground=640V, U-over the ground=-
640V.And UGroove 160-161Just equal with the current potential of the earth reference point, namely perfect condition and full symmetric in the case of,
160#-161# groove be exactly above earth potential be the groove position of zero potential.
Referring to Fig. 7 and Fig. 8, Fig. 7 is zero-potential drift analysis chart over the ground, and Fig. 8 is isoboles grounding phenomenon occur.Electricity
Solving groove series is U-shaped symmetric arrays, can be divided into before and after two sections from tail end, when forward and backward two sections of insulation resistances change,
Its simplify after parallel equivalent resistance also change, its resistance is the most symmetrical, so computer installation detect forward and backward two sections right
Ground voltage also will change, and be no longer original symmetrical voltage-to-ground.U+ over the ground=1280*RInsulation 1-160/(RInsulation 1-160+
RInsulation 161-320)；U-over the ground=-(1280-U+ over the ground).Due to electrolytic bath resistance circuit with insulation equivalent resistance be in parallel,
So the groove number at the over the ground zero potential place equal with ground potential can be found, this groove number simply calculates groove number, and does not represents
This groove number is exactly shorted to earth ground connection.Groove NLeading portion=U+ over the ground/4.Groove NBack segment=160-U-over the ground/4。
Compared with when original perfect condition, symmetric case, the zero potential over the ground of computer installation measuring and calculating is the most symmetrical, creates
The deviation of two sections front and back, calculates that groove number zero potential over the ground there occurs movement, and now we just say that zero potential there occurs drift over the ground
Phenomenon.Before and after electrolytic bath circuit, two sections of self unsymmetry changes of cell resistance are likely to cause null offset, but it is total
Excursion little, be random change.
The generation of zero-potential drift over the ground, has following several situation: one, the situation that insulation resistance is the least, hard ground connection is existing
As, i.e. good with the earth ground connection, define good ground connection with the reinforcing bar in grounded screen.This kind of phenomenon is likely to occur in one
The position of (or simultaneously appearing in several diverse location), once there is ground connection in the second place, as long as bridging voltage reaches certain
Value, it is possible to occur beating arc phenomenon or electrical shock safety accident.Its two, insulation resistance is the least, has obvious ground connection, but resistance is inclined
Little, between 100 Ω-1000 Ω, or between hundreds of Europe to several kilo-ohms, this kind of ground connection may have one or more reality
Earth point, the groove number of zero potential over the ground extrapolated in equivalent circuit is not necessarily the point that actual insulation resistance is the most weak, when only
During one earth point, the groove number of zero potential over the ground of reckoning is the most close with actual insulation resistance the weakest point, but if there is one
During above actual earth point, then the groove number that insulation against ground resistance that the groove number of zero potential over the ground calculated is not the most actual is the most weak
?.Its three, the phenomenon that insulation resistance diminishes, form insulation resistance as insulation board goes bad after carbonization or various impurity or material overlap joint
Diminish.Carry out discriminatory analysis according to the insulating resistance value measured, voltage-to-ground value, then the place that insulation resistance is more weak is carried out
Process, promote insulating capacity.Its four, insulation resistance is in normal scope, but defines certain deviation in same magnitude.
Weak place of insulating can be processed.
The impact on insulation resistance of the cell line ground connection, mainly has following several situation: cell insulation resistance concept
And the impact that ground connection is on insulation resistance.One, insulation resistance is electric wiring, the important indicator of apparatus insulated performance, different rings
Border, under the conditions of insulating requirements be different, majority of case discussion and consider insulation against ground resistance.Its two, electrolysis bath from
Body Insulated positions: 1) with the spacer insulator 2 of platform) insulation 3 of bottom land and cement post body) pot shell and side concrete column
The insulation 4 in face) trench insulation 5 between groove) insulation 6 of trough and row frame) cover plate and trough, the insulation 7 of pot shell) row frame and smoke exhaust pipe
Insulation 8 between road) run overhead traveling crane parts and trough and the insulation of phase disjunctor.Its three, insulation resistance value under normal circumstances: electrolysis bath system
Row insulation against ground resistance should be at more than 1M Ω.Other electric wirings, equipment have the requirement that they are different.Its four, when electric wiring or
Electrical equipment there occurs grounding phenomenon in the case of improper ground connection, then this electric wiring, equipment insulation against ground resistance are by bright
Aobvious reduce, consequently, it is possible to cause the adverse consequencess such as electric, equipment in various degree, personal injury.
Refer to Fig. 9, Figure 10 and Figure 11, the electrolysis bath group insulation against ground resistance detection that Fig. 9 provides for the embodiment of the present invention
The flow chart of steps of method, the structure of the electrolysis bath group insulation against ground resistor detecting device that Figure 10 is applied by the embodiment of the present invention
Schematic diagram, Figure 11 is the equivalent circuit diagram of detection device.Described electrolysis bath group can include above-mentioned cell line, it is also possible to
The combination connected for several adjacent cell of described cell line.Wherein, R1For the insulation against ground resistance of electrolysis bath group, etc.
Being a suspension resistance after effect, no current flows through.With the groove number of electrolysis bath group zero potential position over the ground, there is identical isoelectric level, nothing
Electric current flows through, it can thus be assumed that the position of this equivalent resistance is in zero potential groove position over the ground.Described detection device can include
Electrolysis bath group, test resistance and insulation against ground resistance, described electrolysis bath group can include the second test point (such as A in Fig. 9) and
First test point (such as B in Fig. 9), described test resistance R0One end be connected with described second test point, described test resistance R0's
The other end is connected with described insulation against ground resistance, and the other end of described insulation against ground earth resistance is examined with the first of described electrolysis bath group
Measuring point connects.Due to the equivalent resistance over the ground that the insulation against ground resistance of described electrolysis bath group is the second test point, the most described test
Resistance connects one end ground connection of described insulation against ground resistance.Described method specifically includes that
Step S901, obtain described electrolysis bath group zero potential electrolysis bath estimate position.
The unidirectional current powered for electrolysis bath group can for the insulation resistance and test resistance of the parallel connection of described electrolysis bath group
To regard voltage source as, then insulation resistance in parallel with described electrolysis bath group and test resistance are connected on described voltage source.?
The second test point and the first test point is chosen, between described first test point and described second test point in described electrolysis bath group
Electrolysis bath is as the voltage source of testing circuit.
Obtaining the theoretical voltage-to-ground at bus two ends, described electrolysis bath group termination and actual voltage-to-ground, described theory is over the ground
Voltage can be normal outstanding ground state lower end bus positive pole or negative pole voltage over the ground, and described actual voltage-to-ground is electrolysis
Groove end bus positive pole or the actually measured voltage-to-ground of negative pole.Theory according to bus one end, described electrolysis bath termination is over the ground
What voltage and described actual voltage-to-ground obtained described zero potential electrolysis bath estimates position, its zero potential electrolysis bath estimate position
Acquisition process may include that
Electrolysis bath number according to described theoretical voltage-to-ground and electrolysis bath group obtains the average voltage of each electrolysis bath, root
The first numerical value is obtained, according to described first number according to the actual voltage-to-ground of described electrolysis bath group and the average voltage of described electrolysis bath
Value, with the most extremely initial position of the termination bus of described electrolysis bath, obtain described zero potential electrolysis bath estimates position.
Such as, if described electrolysis bath group is the electrolysis bath system class including 320 electrolysis baths, the theory of described electrolysis bath group is right
Ground voltage is 1280V, and the average voltage of the most each electrolysis bath should be 1280V/320=4V, is i.e. the two ends of each electrolysis bath
Average voltage is 4V.If the actual voltage-to-ground that termination bus positive pole (or negative pole) of actually measured described electrolysis bath group is over the ground
For 100V, 100V/4V=25, the most described first numerical value is 25.The most initial with the termination bus of described electrolysis bath group
Position, then No. 25 electrolysis bath or near it electrolysis bath be zero potential position, or 320-25=295 platform electrolysis bath
Or electrolysis bath is zero potential position over the ground near it.
Step S902, arranges multiple first test point according to the position of estimating of described zero potential electrolysis bath.
By the described zero potential electrolysis bath extrapolated estimate position on the basis of, with electrolysis bath a number of before or after it
Be the first test point join domain, such as using position corresponding for 20-25 electrolysis bath as the join domain of the first test point,
Multiple first test point is set in the first test point join domain, repeatedly to test the position of actual ground connection electrolysis bath.Permissible
For multiple first test point labels successively, preferably examine initially as first first tested from the position that zero potential electrolysis bath is corresponding
Measuring point.
Step S903, chooses the second test point according to the position of estimating of described zero potential electrolysis bath in described electrolysis bath group.
Obtain described electrolysis bath group estimate position after, set the second test point join domain, institute in described electrolysis bath group
Stating the second test point join domain can estimating for zero potential electrolysis bath described in the positive best of described electrolysis bath group termination bus
Electrolysis bath between position.If it is the 20th No. five electrolysis bath that described zero potential electrolysis bath estimates position, the first test point connects
Scope be the 2nd No. ten electrolysis bath to the 3rd No. ten position that electrolysis bath is corresponding, then can be by described number one electrolysis bath to the tenth
No. nine electrolysis baths are set to the second test point join domain, and the second test point is preferably positioned close to described zero potential electrolysis bath
The electrolysis bath estimated near position.
Step S904, obtains first voltage at the test resistance two ends being connected with described second test point, wherein said survey
Examination resistance is away from the other end ground connection of described second test point.
Test resistance accesses circuit, and one end of described test resistance connects described second test point, described test resistance
Other end ground connection.The of described test resistance two ends are obtained by the device of voltmeter, circuit tester or other detection voltages
One voltage.
Step S905, obtains the second voltage between described second test point and each described first test point.
By the second voltage between the second test point and each first test point, can be preferentially from zero potential electrolysis bath
Estimate position to calculate as the second test point.Multiple second voltages obtained are carried out record.
Step S906, obtains each institute according to the resistance of described second voltage, described first voltage and described test resistance
State the insulation against ground resistance value of the first test point.
In order to be further adapted for the resistance of the insulation against ground resistance of described electrolysis bath group, the power selection of described test resistance
Mating, stream burns out the fluctuation of moment voltage-to-ground may to be occurred to occur time bigger at trough if power is little.Described definite value
The power of resistance can be preferably 500W, and the resistance of described fixed value resistance can be preferably 500 Ω, the then operating current of this resistance
Should be less than 1A.
The voltage source of the electrolysis bath equivalence between described first test point and the second test point, described test resistance and described
Insulation against ground equivalent resistance is connected on described equivalent voltage source.By described second voltage U2With described first voltage U1Obtain
The tertiary voltage U at the described resistance two ends of equivalence over the ground3, wherein, described tertiary voltage U3For described second voltage U2With described
One voltage U1Difference, be U3=U2-U1.First electric current of described test circuit can according to the voltage at test resistance two ends and
The resistance value of test resistance obtains, according to the voltage at described first electric current and described insulation against ground resistance two ends calculate described in over the ground
The resistance of insulation resistance.Can obtain according to Ohm's law: U3/R1=U1/R0；
The insulation against ground resistance of the most described electrolysis bath group is: R1=(U2-U1) * R0/U1。
Step S907, when described insulation against ground resistance value meets predetermined threshold value, it is determined that meet the most exhausted of predetermined threshold value
First test point corresponding to edge resistance value is earth point.
Actually detected process for electrolysis bath group may include that
1) detection instrument is got out: a circuit tester, a fixed value resistance (power is enough, and resistance is free), two 50 meters 4
The cable (two ends Tourniquet clamping head) of square millimeter.
2) determine zero potential position (computer installation existing DR position) over the ground to scene, be also cell line corresponding etc.
Effect resistance on-position.
3) by test resistance R0The centre position being serially connected in 50 meters of cables (reserves the exposed position of circuit tester detection
Put).
4) first with 50 meters of cables, the trough current potential of zero potential over the ground is guided to the nearby location of institute's power taking potential source, uses
Real voltage U of institute's power taking potential source measured by circuit tester1。
5) in the middle of another root, R has been concatenated0Cable respectively clamping connection at institute power taking potential source U1Position and the earth metallic ground
Point (forms networking with the earth ground connection), then measures R0The voltage U at two ends0。
After above-mentioned detection process, processor complete the calculating process of follow-up insulation resistance.Processor is according to described
Second voltage U2, the first voltage U1With described test resistance R0Resistance obtain described electrolysis bath group insulation against ground resistance R1's
Resistance.Due on described test resistance and described insulation against ground resistant series to described electrolysis bath group, described electrolysis bath group conduct
Equivalent voltage source, described test resistance and described insulation against ground equivalent resistance dividing potential drop, can obtain described according to series connection intrinsic standoff ratio
The resistance of insulation against ground resistance.
Resistance size and the first preset resistance threshold value according to the insulation against ground resistance calculated obtain described electrolysis bath group
The ground state of described zero potential electrolysis bath, concrete judge process can be:
1, R is worked as1Resistance is several ohm to tens ohm, illustrates that electrolysis bath group has obvious ground connection or the place for hard ground connection,
Now check the voltage-to-ground of computer installation, according to aforesaid method, utilize U+ over the ground/ 4=groove N, groove number now calculates
Hard ground connection or over the ground the weakest point position (this position is probably reality the most weak earth point position, it is also possible to be not reality over the ground
The most weak position, but the equivalence weak position calculated).The operation order that can refer to lower bar method is analyzed and judges.
2, R is worked as1When substantially diminishing, for hundreds of ohm to several kilohms, illustrate that electrolysis bath group has the place of ground connection, now look into
See the voltage-to-ground of computer installation, according to the method above said, utilize U+ over the ground/ 4=groove N, groove number now is over the ground zero calculated
Current potential groove number.
3, when the insulation resistance of detection is within normal range, but when voltage-to-ground deviation is bigger, then anti-according to voltage-to-ground
Situation about answering comprehensively purges cleaning to the region that insulation situation is poor, promotes insulation resistance balance, so that electricity over the ground
Pressure balance as far as possible.This kind of situation is substantially without big harm.Step carries out checking, judge and processing the most in the following order:
The first step, first looks at the insulation situation of zero potential groove number over the ground, and extension front and back checks three troughs, carries out corresponding
Insulation processing, if voltage-to-ground change is substantially, insulation resistance also promotes substantially, then confirmed and problem is processed,
If voltage-to-ground is still without significant change, then problem trough be positioned at before this groove number, below at least two positions, place (forward and backward
The groove number of zero potential over the ground corresponding to equivalent resistance after trough insulation against ground resistor coupled in parallel is not the position that insulation resistance is the most weak
Put), enter second step；
Second step, first processes suspicion groove number above, sees whether voltage-to-ground has significant change, and insulation resistance has
Without being obviously improved, if any significant change, then prove that suspicion groove number above is confirmed and eliminates, enter the 3rd step；If it is right
Ground voltage, without being obviously improved then continues to make a look up in this region and process without significant change or insulation resistance, arrives until processing
Till Wei.(design emphasis be firstly placed on occurring bakie, cut aluminum slag, insulation board damages, close to platform is crossed, the asking of the phenomenon such as leak
Topic trough, other trough of the most careful inspection)
3rd step, processes suspicion groove number below (according to the voltage-to-ground after change, over the ground by similar method
Insulation resistance situation).
Refer to Figure 12, for the structural representation of the electrolysis bath group insulation against ground resistance detection that present pre-ferred embodiments provides
Figure.On the basis of above-described embodiment, it is also possible to determine whether for the Grounding of zero potential electrolysis bath in electrolysis group.Institute
State electrolysis bath and can also include the 3rd test point (C point in figure), according to resistance and the described insulation against ground electricity of described test resistance
Resistance chooses the 3rd test point between the first test point and the second test point, and described 3rd test point can be above-described embodiment
Middle electrolysis bath group connects the position of zero potential electrolysis bath corresponding to the equivalent insulation against ground resistance after described test resistance.Described
Three test points connect the iron plate (D point in figure) of described zero potential electrolysis bath, and the other end of the iron plate of described zero potential electrolysis bath is even
Connecing described insulation against ground resistance, described test resistance is also connected to described zero potential electrolysis bath away from one end of described electrolysis bath group
Iron plate.Described device can also include the second current sensing means A2, the 4th voltage check device U4, the 5th voltage detecting dress
Put U5With the 6th voltage check device U6, they are all connected with described processor, the transmission of detection data are calculated to processor
Process.
Described second current sensing means A2One end connect described test resistance away from one end of electrolysis bath group, described the
Two current sensing means A2The other end connect described zero potential electrolysis bath iron plate, for detection flow through described test resistance
Electric current.One end of described 4th voltage check device connects described second test point, another of described 4th voltage check device
End connects described 3rd test point, and described 4th voltage check device is used for detecting described second test point and described 3rd detection
Voltage between point.Described 5th voltage check device connects described 3rd test point and described iron plate, is used for detecting described the
The 5th voltage between three test points and described iron plate, namely described in the electricity at the insulation board two ends of zero potential electrolysis bath over the ground
Pressure.Described 6th voltage check device connects described second test point and described iron plate, be used for obtaining described second test point with
6th voltage at the described test resistance two ends connected between described iron plate.
According to the second electric current A2, the 4th voltage U4, the 5th voltage U5, the 6th voltage U6Obtain described with the second predetermined threshold value
The ground state of zero potential electrolysis bath.Particular state judge process can be:
If described second electric current A2It is zero or the least, the most directly judges that the insulation of this some position is normal.
If described second electric current A2Bigger than normal, then illustrate that the insulation board of this some position is problematic or concrete is the most problematic,
That is R3Or R4Less than normal, or both are less than normal.If the 6th voltage U6Bigger than normal and more than the 4th voltage U4, then illustrate
The concrete pier of zero potential electrolysis bath goes wrong over the ground.If described 6th voltage U6Less than the 4th voltage U4, and the 4th voltage U4
Equal to described 6th voltage U6With described 5th voltage U5Sum, then can determine whether described in the insulation board of zero potential electrolysis bath over the ground go out
Existing problem.If the 4th voltage U4Value equal to described 6th voltage U6With described 5th voltage U5Difference, then can determine whether described in over the ground
Concrete pier and the insulation board of zero potential electrolysis bath all go wrong.For zero potential electrolysis bath over the ground a little the sentencing of position
Disconnected, if the second electric current A2Bigger than normal, then first insulation board can be cleared up or change, get rid of suspicion.
Concrete detection process can be such that
1) first carry out naked eyes (by torch) to observe, see if there is obvious grounding phenomenon and (be dried mixed earth substantially to think
Insulation is normal, and moist mixed earth is regarded as low resistance earthing, exposed reinforcement it is believed that be equal to the earth), if any, and
Shi Jinhang process；
2) then to suspect some position carry out voltage tester, if this some position have on insulation board, and insulation board with pot shell or
Bus contacts, under be connected with the earth again by iron plate and mixed earth or other materials, test pot shell or bus the most respectively to iron plate
DC voltage, the iron plate DC voltage to the earth, if the former is no better than the normal voltage-to-ground of trough, and the latter's direct current
Voltage is almost nil, then this some position insulation is normal, can get rid of suspicion, if contrary or both voltages are close, maybe can not ignore, then
Can determine that this some position insulation is problematic.
3) in the case of in upper bar, without iron plate, then voltage tester is carried out the most relatively difficult, because mixing earth
Insulating resistance value difference is very big, and degree of drying is different, and cylinder terrain clearance is different, and in cylinder, reinforcing bar parcel location is different, cylinder
The soil moisture degree difference at place all has significantly impact to resistance value.Bakie occurred, beat arc, immersion or other situations and
At situation about destroying, it is possible to carry out corresponding DC voltage detection, and judge, if detection judges inconvenient, can adopt
Verification process is carried out by the method changing insulant.
See Figure 13, a kind of electrolysis bath group insulation against ground resistor detecting device 1300 that the embodiment of the present invention provides, it is used for
The insulation against ground resistance of detection electrolysis bath group, is applied to above-mentioned detection method.Described device 1300 includes:
Processor 1301, for obtain described electrolysis bath group zero potential electrolysis bath estimate position, according to described zero electricity
The position of estimating of position electrolysis bath arranges multiple first test point, according to the position of described zero potential electrolysis bath in described electrolysis flowing current separation
Take the second test point；
First voltage check device 1302, for obtaining the electricity at the test resistance two ends being connected with described second test point
Pressure, wherein, described test resistance is away from the other end ground connection of described second test point；
Second voltage check device 1303, for obtaining between described second test point and each described first test point
Second voltage；
Described processor is additionally operable to the resistance according to described second voltage, described first voltage and described test resistance and obtains
The insulation against ground resistance value of each described first test point, when described insulation against ground resistance value meets predetermined threshold value, it is determined that full
The first test point that the insulation against ground resistance value of foot predetermined threshold value is corresponding is earth point.
On the basis of above-described embodiment, described device also includes:
Theoretical voltage-to-ground detection device 1304, the most electric for obtaining the theory at bus two ends, described electrolysis bath group termination
Pressure；
Actual voltage-to-ground detection device 1305, the most electric for obtaining the reality at bus two ends, described electrolysis bath group termination
Pressure；
Described processor is specifically for the described theoretical voltage-to-ground according to bus two ends, described electrolysis bath termination and described
Actual voltage-to-ground obtain described zero potential electrolysis bath estimate position.
Described processor specifically for:
Electrolysis bath number according to described theoretical voltage-to-ground and electrolysis bath group obtains the average voltage of each electrolysis bath；
Actual voltage-to-ground and the average voltage of described electrolysis bath according to described electrolysis bath group obtain the first numerical value；
According to described first numerical value, with the most extremely initial position of the termination bus of described electrolysis bath, obtain described zero electricity
Position electrolysis bath estimate position.
Described processor is additionally operable to the resistance according to described test resistance and described insulation against ground resistance value in the second detection
Choosing the 3rd test point between point and the first test point, described device also includes:
Second current sensing means 1306, for obtaining the second electric current of described test resistance, wherein, described second electric current
The electric current after the iron plate of described zero potential electrolysis bath is connected for described test resistance；
4th voltage check device 1307, for obtaining the 4th between described second test point and described 3rd test point
Voltage；
5th voltage check device 1308, for obtain described 3rd test point and described zero potential electrolysis bath iron plate it
Between the 5th voltage；6th voltage check device 1309, for obtaining described second test point and described zero potential electrolysis bath
The 6th voltage between iron plate；
Described processor is additionally operable to according to described second electric current, described 4th voltage, described 5th voltage, described 6th electricity
Pressure and the second predetermined threshold value obtain the ground state of described zero potential electrolysis bath.
The electrolysis bath group insulation against ground resistor detection method that the invention described above embodiment provides, is applied to above-mentioned electrolysis bath
Group insulation against ground resistor detecting device, for being mostly in the insulation against ground resistor detection method of the electrolysis bath group of prior art to use
Circuit tester directly detects, and can cause the technical problem of the damage of detection circuit tester due to the high voltage of electrolysis bath group, carry
The detection method of the insulation against ground resistance of the electrolysis bath group of confession and device, be connected to described electrolysis by the test resistance of known resistance
The voltage that groove group, the full section of test electrolysis bath group or part groove are intersegmental, draws the insulation against ground resistance of described electrolysis bath group, reaches
The technology of the resistance detection of electrolysis bath group insulation against ground resistance can be obtained by the nondestructive measurement of test circuit related data
Effect.The specific implementation process of the detection method that the present embodiment provides can refer to said apparatus embodiment, goes to live in the household of one's in-laws on getting married the most one by one at this
State.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. an electrolysis bath group insulation against ground resistor detection method, it is characterised in that for detecting the insulation against ground of electrolysis bath group
Resistance, is applied to electrolysis bath group insulation against ground resistor detecting device, and described method includes:
Obtain described electrolysis bath group zero potential electrolysis bath estimate position；
Position of estimating according to described zero potential electrolysis bath arranges multiple first test point；
The second test point is chosen in described electrolysis bath group in position of estimating according to described zero potential electrolysis bath；
Obtaining first voltage at the test resistance two ends being connected with described second test point, wherein said test resistance is away from described
The other end ground connection of the second test point；
Obtain the second voltage between described second test point and each described first test point；
Resistance according to described second voltage, described first voltage and described test resistance obtains each described first test point
Insulation against ground resistance value；
When described insulation against ground resistance value meets predetermined threshold value, it is determined that the insulation against ground resistance value meeting predetermined threshold value is corresponding
First test point is earth point.
Method the most according to claim 1, it is characterised in that the zero potential electrolysis bath of described acquisition described electrolysis bath group
Estimate the step of position, including:
Obtain the theoretical voltage-to-ground at bus two ends, described electrolysis bath group termination；
Obtain the actual voltage-to-ground at bus two ends, described electrolysis bath group termination；
Described theoretical voltage-to-ground and described actual voltage-to-ground according to bus two ends, described electrolysis bath group termination obtain described
Zero potential electrolysis bath estimate position.
Method the most according to claim 2, it is characterised in that the described institute according to bus two ends, described electrolysis bath group termination
State theoretical voltage-to-ground and the step estimating position of described actual voltage-to-ground acquisition zero potential electrolysis bath, including:
Electrolysis bath number according to described theoretical voltage-to-ground and electrolysis bath group obtains the average voltage of each electrolysis bath；
Actual voltage-to-ground and the average voltage of described electrolysis bath according to described electrolysis bath group obtain the first numerical value；
According to described first numerical value, with the most extremely initial position of the termination bus of described electrolysis bath, obtain described zero potential electricity
Solve groove estimates position.
Method the most according to claim 1, it is characterised in that the described position of estimating according to described zero potential electrolysis bath exists
Described electrolysis bath group chooses the step of the second test point, including:
Position of estimating according to described zero potential electrolysis bath sets the second test point join domain in described electrolysis bath group, wherein,
Described second test point join domain be the termination bus of described electrolysis bath group positive best described in the estimating of zero potential electrolysis bath
Electrolysis bath between position；
The second test point is chosen near the position of described zero potential electrolysis bath at described second test point join domain.
Method the most according to claim 1, it is characterised in that described according to described second voltage, described first voltage and
The resistance of described test resistance obtains the step of the insulation against ground resistance value of described first test point, including:
The tertiary voltage at insulation against ground resistance two ends is obtained according to described second voltage and described first voltage；
Resistance according to described first voltage and described test resistance obtains the first electric current；
Described insulation against ground resistance value is obtained according to described tertiary voltage and described first electric current.
Method the most according to claim 5, it is characterised in that described method also includes:
Resistance and described insulation against ground resistance value according to described test resistance are selected between the second test point and the first test point
Take the 3rd test point；
Obtaining the second electric current of described test resistance, wherein, described second electric current is that described test resistance connects described zero potential
Electric current after the iron plate of electrolysis bath；
Obtain the 4th voltage between described second test point and described 3rd test point；
Obtain the 5th voltage between described 3rd test point and the iron plate of described zero potential electrolysis bath；
Obtain the 6th voltage between the iron plate of described second test point and described zero potential electrolysis bath；
Obtain according to described second electric current, described 4th voltage, described 5th voltage, described 6th voltage and the second predetermined threshold value
The ground state of described zero potential electrolysis bath.
7. an electrolysis bath group insulation against ground resistor detecting device, it is characterised in that for detecting the insulation against ground of electrolysis bath group
Resistance, described device includes:
Processor, for obtain described electrolysis bath group zero potential electrolysis bath estimate position, according to described zero potential electrolysis bath
Position of estimating multiple first test point is set, choose second according to the position of described zero potential electrolysis bath in described electrolysis bath group
Test point；
First voltage check device, for obtaining first voltage at the test resistance two ends being connected with described second test point, its
In, described test resistance is away from the other end ground connection of described second test point；
Second voltage check device, for obtaining the second electricity between described second test point and each described first test point
Pressure；
Described processor is additionally operable to the resistance according to described second voltage, described first voltage and described test resistance and obtains each
The insulation against ground resistance value of described first test point, when described insulation against ground resistance value meets predetermined threshold value, it is determined that meet pre-
If the first test point corresponding to the insulation against ground resistance value of threshold value is earth point.
Device the most according to claim 7, it is characterised in that described device also includes:
Theoretical voltage-to-ground detection device, for obtaining the theoretical voltage-to-ground at bus two ends, described electrolysis bath group termination；
Actual voltage-to-ground detection device, for obtaining the actual voltage-to-ground at bus two ends, described electrolysis bath group termination；
Described processor is specifically for the described theoretical voltage-to-ground according to bus two ends, described electrolysis bath termination and described reality
Voltage-to-ground obtain described zero potential electrolysis bath estimate position.
Device the most according to claim 8, it is characterised in that described processor specifically for:
Electrolysis bath number according to described theoretical voltage-to-ground and electrolysis bath group obtains the average voltage of each electrolysis bath；
Actual voltage-to-ground and the average voltage of described electrolysis bath according to described electrolysis bath group obtain the first numerical value；
According to described first numerical value, with the most extremely initial position of the termination bus of described electrolysis bath, obtain described zero potential electricity
Solve groove estimates position.
Device the most according to claim 7, it is characterised in that described processor is additionally operable to according to described test resistance
Resistance and described insulation against ground resistance value choose the 3rd test point between the second test point and the first test point, and described device is also
Including:
Second current sensing means, for obtaining the second electric current of described test resistance, wherein, described second electric current is described survey
Examination resistance connects the electric current after the iron plate of described zero potential electrolysis bath；
4th voltage check device, for obtaining the 4th voltage between described second test point and described 3rd test point；
5th voltage check device, for obtaining the 5th between described 3rd test point and the iron plate of described zero potential electrolysis bath
Voltage；
6th voltage check device, the 6th between the iron plate obtaining described second test point and described zero potential electrolysis bath
Voltage；
Described processor be additionally operable to according to described second electric current, described 4th voltage, described 5th voltage, described 6th voltage and
Second predetermined threshold value obtains the ground state of described zero potential electrolysis bath.
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| CN107504892A (en) * | 2017-10-13 | 2017-12-22 | 中国恩菲工程技术有限公司 | Ore-smelting electric furnace thickness of slag layer detection means and detection method |
| CN109946525A (en) * | 2019-03-15 | 2019-06-28 | 湖南强军科技有限公司 | A kind of device and method of measurement of Grounding Resistance |
| CN110286317A (en) * | 2019-04-29 | 2019-09-27 | 惠州市亿能电子有限公司 | A kind of diagnostic circuit and method of battery system |
| CN115494427A (en) * | 2022-09-26 | 2022-12-20 | 内蒙古霍煤鸿骏铝电有限责任公司 | Method for detecting ground insulation fault of aluminum electrolytic cell |
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| CN115494427A (en) * | 2022-09-26 | 2022-12-20 | 内蒙古霍煤鸿骏铝电有限责任公司 | Method for detecting ground insulation fault of aluminum electrolytic cell |
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| CN106093576B (en) | 2019-01-15 |
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