CN101995518A - Aluminium electrolysis bus system resistance to ground detection device and detection method thereof - Google Patents
Aluminium electrolysis bus system resistance to ground detection device and detection method thereof Download PDFInfo
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- CN101995518A CN101995518A CN2009103054977A CN200910305497A CN101995518A CN 101995518 A CN101995518 A CN 101995518A CN 2009103054977 A CN2009103054977 A CN 2009103054977A CN 200910305497 A CN200910305497 A CN 200910305497A CN 101995518 A CN101995518 A CN 101995518A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 39
- 239000004411 aluminium Substances 0.000 title claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 title claims abstract description 19
- 238000005868 electrolysis reaction Methods 0.000 title abstract description 7
- 238000009413 insulation Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000015556 catabolic process Effects 0.000 claims abstract description 7
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 150000001879 copper Chemical class 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000013500 data storage Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The invention discloses an aluminium electrolysis bus system resistance to ground detection device and a detection method thereof. The device comprises a keyboard input device, a partial pressure filter, an amplifier, an MCU controller and an LED display; wherein all the parts are mutually electrically connected. The detection method includes 'auxiliary short circuit line method' and 'auxiliary grounding method'. The 'auxiliary short circuit line method' includes that the aluminium electrolysis cell bus system resistance to ground detection device is connected with a thick copper wire, short time short circuit to ground of the copper wire at electrolysis cell buses at different voltage classes is utilized to measure leakage current, a short circuit point is disconnected to measure the voltage to ground of the point, and equivalent resistance to ground of system is calculated according to ohm's law; and the 'auxiliary grounding method' includes that the whole series electrolysis cell support and bus piers are measured one by one, and disqualified point is found and cleaned, so as to judge and process an insulation breakdown point. The detection device and method thereof also can be applied to other occasions with strong direct current magnetic field and high distributed capacitance.
Description
Technical field
The present invention relates to a kind of resistor detecting device and detection method, particularly relate to a kind of aluminium electroloysis bus-bar system resistance to earth pick-up unit and detection method.
Background technology
The insulation over the ground of electrolytic tank and dc bus is extremely important in the industrial aluminum electrolysis production.As long as some low-impedance earthed systems are arranged in the tank systems, the system zero potential point will drift about, and causes a part voltage-to-ground to raise, and equipment and personal safety in serious threat, as second low-impedance earthed system arranged again, sparking discharge even blast will take place.With the raising of electrolytic series voltage, the accident of exploding, damage equipment such as multifunction crane because of the sparking that insulation breakdown causes constantly takes place in recent years.
At present, aluminium cell and bus insulation situation over the ground 500V megger commonly used or multimeter detect, and can not realize correct judgement.The separate unit electrolytic tank all will be measured insulation resistance over the ground during installation, uses the 500V megger, and can measure numerical value is about 1M Europe.After many electrolytic tanks connected with bus, resistance to earth had become less and can not measure with megger.There is voltage-to-ground in bus after energising, and it is impossible measuring resistance to earth with megger or multimeter.Particularly the tetanic stream of aluminium cell magnetic field, distributed capacitance is big, electromagnetic interference (EMI) is strong, the busbar enormous size, insulating point is numerous, system architecture is complicated, the series connection node numerous complicated, can not realize correct the detection and monitoring at all.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of aluminium electroloysis bus-bar system resistance to earth detector device is provided, and this apparatus structure is simple, safe in utilization, convenient, fast; Another technical matters that the present invention will solve is, a kind of aluminium electroloysis bus-bar system resistance to earth detection method is provided, use aluminium electroloysis bus-bar system resistance to earth detector device to detect, with overcome that prior art exists to the tetanic stream of aluminium cell magnetic field, distributed capacitance is big, electromagnetic interference (EMI) is strong, the busbar enormous size, insulating point is numerous, system architecture is complicated, the series connection node numerous complicated, can not realize correct the detection and the deficiency of monitoring at all.
Aluminium electroloysis bus-bar system resistance to earth detector device of the present invention is taked following technical scheme: it comprises finger-impu system, dividing potential drop wave filter, amplifier, MCU controller, light-emitting diode display, is electrical connection between the each several part.
The circuit of described dividing potential drop wave filter is formed by connecting by high-power precision resistance and electric capacity.The circuit of dividing potential drop wave filter is that resistor capacitor circuit carries out filtering by the RC circuit for the voltage on the electrolytic tank is reduced in the acquisition range of AD by high-power precision resistance R afterwards.
The circuit of described amplifier is made up of 4 integrated operational amplifiers.The circuit of amplifier is formed accurate instrument amplifier by simple integrated operational amplifier, and the filtered signal of dividing potential drop is carried out processing and amplifying, and according to the signal magnitude automatic switching range..
The circuit of described LCD display drives charactron for forming cascade circuit by 4 integrated charactron driving circuits.
The circuit of described MCU controller includes the STC89LE58RD single-chip microcomputer that kernel is 80C51, and this single-chip microcomputer comprises AD acquired signal processor, E
2Data storage and read write line among the PROM, clock chip read-write controller, LCD driving circuit controller.
Aluminum cell bus-bar system resistance to earth detector device can overcome the limitation of conventional instrument, can directly measure the equivalent over the ground insulation resistance of the electrolysis direct current bus-bar system in the production, judges the insulation breakdown situation of system thus.Also be applicable to insulation such as batch detection electrolytic tank support, bus pier positions voltage, electric current, resistance parameter, can preserve testing result and testing result can be sent into computing machine and carry out statistical study and handle, find out and do not conform to lattice point and clear up, reach the purpose of judging and handling insulation breakdown point.
The detection method of using aluminum cell bus-bar system resistance to earth detector device to detect aluminum cell bus-bar system resistance to earth comprises that use " auxiliary short-circuit line method " reaches " auxiliary earth method ".
Use " auxiliary short-circuit line method " to detect, be to receive on the earthing pole of measure field after the earth terminal in two binding posts of aluminum cell bus-bar system resistance to earth detector device is connected in series an air switch with thick copper lines, another binding post connects a thick copper lines, instrument is chosen the current measurement shelves, and (resistance value is very little between instrument two binding posts at this moment, be equivalent to short-circuit condition), in the short time short circuit over the ground of the electrolyzer bus place of appropriate voltage grade, measure short-circuit current with this copper cash.Again instrument is chosen voltage measurement shelves (resistance value is very big between instrument two binding posts at this moment, is equivalent to open-circuit condition), measured this voltage-to-ground V, calculate the equivalent resistance to earth value R of system according to Ohm law.According to improving the measuring accuracy requirement, can repeat in the many places of different electric pressures to measure, average.If electric current is excessive when certain point measurement, then instrument safety is protected in the air switch tripping.
Use " auxiliary earth method " to detect, be to receive on the earthing pole of measure field after the earth terminal in two binding posts of aluminum cell bus-bar system resistance to earth detector device is connected in series an air switch with thick copper lines, another binding post connects a thick copper lines, instrument is chosen the current measurement shelves, and (resistance value is very little between instrument two binding posts at this moment, be equivalent to short-circuit condition), connect electrolytic tank joist steel support and bus pier joist steel support measurement leakage current respectively with this copper cash, surpass alarm setting value as electric current and illustrate that then there is electric leakage in this macromolecule insulcrete place, need handle.By whole serial electrolytic tank support, bus pier are measured one by one, find out insulation breakdown point and promptly do not conform to lattice point and clear up, reach the purpose of improving the system insulation situation.
1), counting according to the insulation of series calculates the equivalent resistance of this series requirement by per pass insulation resistance 2M Europe cell insulation examination criteria:; 2), measure serial equivalent resistance and calculated value comparison with described method.As greater than above-mentioned value, can think that then system insulation in order; As having illustrated then that less than above-mentioned value one or more insulation course classes of insulation descend.
Aluminum cell bus-bar system resistance to earth detector device cell insulation pick-up unit can be applied to the detection and the monitoring of aluminium cell insulation situation over the ground; Also can be applied to other tetanic stream magnetic field, distributed capacitance is big, electromagnetic interference (EMI) is strong, the busbar enormous size, insulating point is numerous, system architecture is complicated, the equipment of series connection node numerous complicated insulate detects and monitoring.
Description of drawings
Fig. 1 is the electrical connection block diagram representation between the resistance to earth detector device each several part of the present invention;
Fig. 2 is a pressure filter circuit synoptic diagram of the present invention;
Fig. 3 is an amplifying circuit synoptic diagram of the present invention;
Fig. 4 is a LCD cascade circuit synoptic diagram of the present invention, 4 the integrated charactrons of 4 " 8 font " expression among the figure in the square frame;
Fig. 5 is a MCU controller circuitry synoptic diagram of the present invention;
Fig. 6 is the annexation synoptic diagram of " auxiliary short-circuit line method " of the present invention;
Fig. 7 is the annexation synoptic diagram of " the auxiliary earth method " of invention.
Embodiment
Embodiments of the invention: as schematically shown in Figure 1, the present invention is made up of finger-impu system, dividing potential drop wave filter, amplifier, MCU controller, light-emitting diode display, is electrical connection between its each several part.
As schematically shown in Figure 2, the circuit of the dividing potential drop wave filter of described aluminium electroloysis bus-bar system resistance to earth detector device is formed by connecting by high-power precision resistance and electric capacity.The circuit of dividing potential drop wave filter is that resistor capacitor circuit carries out filtering by the RC circuit for the voltage on the electrolytic tank is reduced in the acquisition range of AD by high-power precision resistance R afterwards.General 5～6 high-power precision resistances and 4～5 filter capacitors of adopting of this circuit.
As schematically shown in Figure 3, the circuit of the amplifier of described aluminium electroloysis bus-bar system resistance to earth detector device is made up of 4 integrated operational amplifiers.The circuit of amplifier is formed accurate instrument amplifier by simple integrated operational amplifier, and the filtered signal of dividing potential drop is carried out processing and amplifying, and according to the signal magnitude automatic switching range..
As schematically shown in Figure 4, the circuit of the LCD display of described aluminium electroloysis bus-bar system resistance to earth detector device drives charactron for forming cascade circuit by 4 integrated charactron driving circuits.
As schematically shown in Figure 5, the circuit of the MCU controller of described aluminium electroloysis bus-bar system resistance to earth detector device includes the STC89LE58RD single-chip microcomputer that kernel is 80C51, and this single-chip microcomputer comprises AD acquired signal processor, E
2Data storage and read write line among the PROM, clock chip read-write controller, LCD driving circuit controller.
The detection method of using aluminum cell bus-bar system resistance to earth detector device to detect aluminum cell bus-bar system resistance to earth comprises that use " auxiliary short-circuit line method " reaches " auxiliary earth method ".
Use " auxiliary short-circuit line method " to detect, as shown in Figure 6, it is to receive on the earthing pole of measure field after the earth terminal in two binding posts of aluminum cell bus-bar system resistance to earth detector device is connected in series an air switch with thick copper lines, another binding post connects a thick copper lines, instrument is chosen the current measurement shelves, and (resistance value is very little between instrument two binding posts at this moment, be equivalent to short-circuit condition), in the short time short circuit over the ground of the electrolyzer bus place of appropriate voltage grade, measure short-circuit current with this copper cash.Again instrument is chosen voltage measurement shelves (resistance value is very big between instrument two binding posts at this moment, is equivalent to open-circuit condition), measured this voltage-to-ground V, calculate the equivalent resistance to earth value R of system according to Ohm law.In order to improve measuring accuracy, can repeat in the many places of different electric pressures to measure, average.If electric current is excessive when certain point measurement, then instrument safety is protected in the air switch tripping.
The present invention also uses " auxiliary earth method " to detect, as shown in Figure 7, it is to receive on the earthing pole of measure field after the earth terminal in two binding posts of aluminum cell bus-bar system resistance to earth detector device is connected in series an air switch with thick copper lines, another binding post connects a thick copper lines, instrument is chosen the current measurement shelves, and (resistance value is very little between instrument two binding posts at this moment, be equivalent to short-circuit condition), connect electrolytic tank joist steel support and bus pier joist steel support measurement leakage current respectively with this copper cash, surpass alarm setting value as electric current and illustrate that then there is electric leakage in this macromolecule insulcrete place, need handle.By whole serial electrolytic tank support, bus pier are measured one by one, find out insulation breakdown point and promptly do not conform to lattice point and clear up, reach the purpose of improving the system insulation situation.
Claims (8)
1. aluminium electroloysis bus-bar system resistance to earth detector device, it is characterized in that: it comprises finger-impu system, dividing potential drop wave filter, amplifier, MCU controller, LCD display, between the each several part for being electrically connected.
2. aluminium electroloysis bus-bar system resistance to earth detector device according to claim 1, it is characterized in that: the circuit of described dividing potential drop wave filter is formed by connecting by high-power precision resistance and electric capacity.
3. aluminium electroloysis bus-bar system resistance to earth detector device according to claim 1, it is characterized in that: the circuit of amplifier is made up of 4 integrated operational amplifiers.
4. aluminium electroloysis bus-bar system resistance to earth detector device according to claim 1 is characterized in that: the circuit of described LCD display drives charactron for forming cascade circuit by 4 integrated charactron driving circuits.
5. aluminium electroloysis bus-bar system resistance to earth detector device according to claim 1, it is characterized in that: the circuit of described MCU controller includes the STC89LE58RD single-chip microcomputer that kernel is 80C51, this single-chip microcomputer comprises AD acquired signal processor, data storage and read write line among the E2PROM, the clock chip read-write controller, LCD driving circuit controller.
6. aluminium electroloysis bus-bar system resistance to earth detector device according to claim 2, it is characterized in that: the circuit of described dividing potential drop wave filter is made up of 5～6 high-power precision resistances and 4～5 filter capacitors.
7. aluminum cell bus-bar system resistance to earth detection method of using aluminum cell bus-bar as claimed in claim 1 system resistance to earth detector device, it is characterized in that: use " auxiliary short-circuit line method " to detect, its concrete grammar is to receive on the earthing pole of measure field after the earth terminal in two binding posts of aluminum cell bus-bar system resistance to earth detector device is connected in series an air switch with thick copper lines, another binding post connects a thick copper lines, instrument is chosen the current measurement shelves, with this copper cash in the short time short circuit over the ground of the electrolyzer bus place of appropriate voltage grade, measure short-circuit current, again instrument is chosen the voltage measurement shelves, measure this voltage-to-ground V, calculate the equivalent resistance to earth value R of system according to Ohm law; According to the requirement of measuring accuracy, repeat to measure in the many places of different electric pressures, get its mean value, the equivalent resistance to earth value of computing system.
8. aluminum cell bus-bar according to claim 7 system resistance to earth detection method, it is characterized in that: it also further uses " auxiliary earth method " to detect, its concrete grammar is to receive on the earthing pole of measure field after the earth terminal in two binding posts of aluminum cell bus-bar system resistance to earth detector device is connected in series an air switch with thick copper lines, another binding post connects a thick copper lines, instrument is chosen the current measurement shelves, connect electrolytic tank joist steel support and bus pier joist steel support measurement leakage current respectively with this copper cash; Using such method is measured one by one to whole serial electrolytic tank support, bus pier, finds out the insulation breakdown point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009103054977A CN101995518A (en) | 2009-08-11 | 2009-08-11 | Aluminium electrolysis bus system resistance to ground detection device and detection method thereof |
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| CN2009103054977A CN101995518A (en) | 2009-08-11 | 2009-08-11 | Aluminium electrolysis bus system resistance to ground detection device and detection method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298091A (en) * | 2011-05-16 | 2011-12-28 | 江苏斯达工业科技有限公司 | Detection circuit of direct-current power supply insulation resistance to ground |
| CN102841230A (en) * | 2012-09-25 | 2012-12-26 | 上海微频莱机电科技有限公司 | Safety protection structure of voltage detection circuit |
| CN103105564A (en) * | 2011-11-14 | 2013-05-15 | 沈阳铝镁设计研究院有限公司 | Aluminum electrolytic cell series ground insulation intensity measuring circuit |
| CN105021944A (en) * | 2015-07-17 | 2015-11-04 | 上海斐讯数据通信技术有限公司 | Low-resistance connectivity testing apparatus and method |
| CN105024339A (en) * | 2015-06-04 | 2015-11-04 | 郑州发祥铝业有限公司 | Tank controller protective device for preventing anode separation |
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| CN2890943Y (en) * | 2005-05-09 | 2007-04-18 | 苍南县科星电子科技有限公司 | Portable direct current system earthing fault detector |
| CN1971293A (en) * | 2006-11-29 | 2007-05-30 | 李景禄 | Method for measuring heavy current portable grounding resistance and its device |
| CN101210943A (en) * | 2007-12-22 | 2008-07-02 | 徐田中 | Method for measuring grounding insulation resistance of electric power DC system |
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2009
- 2009-08-11 CN CN2009103054977A patent/CN101995518A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2172491Y (en) * | 1993-05-07 | 1994-07-20 | 张振贵 | Electronic automatic balance controller |
| CN2890943Y (en) * | 2005-05-09 | 2007-04-18 | 苍南县科星电子科技有限公司 | Portable direct current system earthing fault detector |
| CN1971293A (en) * | 2006-11-29 | 2007-05-30 | 李景禄 | Method for measuring heavy current portable grounding resistance and its device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298091A (en) * | 2011-05-16 | 2011-12-28 | 江苏斯达工业科技有限公司 | Detection circuit of direct-current power supply insulation resistance to ground |
| CN102298091B (en) * | 2011-05-16 | 2013-07-17 | 江苏斯达工业科技有限公司 | Detection circuit of direct-current power supply insulation resistance to ground |
| CN103105564A (en) * | 2011-11-14 | 2013-05-15 | 沈阳铝镁设计研究院有限公司 | Aluminum electrolytic cell series ground insulation intensity measuring circuit |
| CN102841230A (en) * | 2012-09-25 | 2012-12-26 | 上海微频莱机电科技有限公司 | Safety protection structure of voltage detection circuit |
| CN105024339A (en) * | 2015-06-04 | 2015-11-04 | 郑州发祥铝业有限公司 | Tank controller protective device for preventing anode separation |
| CN105021944A (en) * | 2015-07-17 | 2015-11-04 | 上海斐讯数据通信技术有限公司 | Low-resistance connectivity testing apparatus and method |
| CN105021944B (en) * | 2015-07-17 | 2018-01-16 | 上海斐讯数据通信技术有限公司 | A kind of low resistance connectivity testing device and method |
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Application publication date: 20110330 |