CN101907680A - Electrolysis direct current system online insulated monitoring device and a monitoring method - Google Patents
Electrolysis direct current system online insulated monitoring device and a monitoring method Download PDFInfo
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- CN101907680A CN101907680A CN2009100118426A CN200910011842A CN101907680A CN 101907680 A CN101907680 A CN 101907680A CN 2009100118426 A CN2009100118426 A CN 2009100118426A CN 200910011842 A CN200910011842 A CN 200910011842A CN 101907680 A CN101907680 A CN 101907680A
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Abstract
The invention relates to an electrolysis direct current online insulated monitoring device and a monitoring method. The device comprises a first voltage transducer and a second voltage transducer which are connected in series at two ends of a high electrolysis direct current bus voltage, a fifth voltage transducer parallelly connected with the first voltage transducer and the second voltage transducer which are connected in series, and electrolytic cells arranged at the two ends of the high electrolysis direct current bus voltage. The device is characterized in that: a third voltage transducer and a fourth voltage transducer, which are connected in series, are arranged at the two ends of the high electrolysis direct current bus voltage; a fuse is arranged between each of the first and second voltage transducers and the neutral point of a high electrolysis direct current bus; the third voltage transducer and the fourth transducer are grounded; the output put ends of the first voltage transducer, the second voltage transducer, the third voltage transducer, the fourth voltage transducer and the fifth voltage transducer are connected with a PLC input and output module; and the PLC input and output module is connected with a display screen.
Description
Technical field
The present invention relates to a kind of on-line insulation monitoring device, relate in particular to a kind of electrolysis direct current system online insulated monitoring device and monitoring method.
Background technology
The aluminium electroloysis system is composed in series by dc bus by a hundreds of electrolytic tank, be installed in nearly two kilometers long cell rooms, electrolytic tank and interconnective dc bus all are on the exposed insulator that is installed in separately, in the production engineering just the dependence personnel stand in and guarantee production run safety on the operation planar with insulation characterisitic, do not allow the earth zero potential to introduce in electrolytic tank and the operation planar 4M scope during design management, in when, electrolytic tank or dc bus insulation against ground reduction taking place more arbitrarily in the electrolysis system even puncturing over the ground when, be built into serious consequence, when if electrolytic bath body drain groove taking place or collapsing groove, to force full electrolytic series to have a power failure, cause heavy economic losses, go back entail dangers to when serious to operator's life.Therefore, the insulation against ground condition monitoring of the insulation against ground of electrolytic tank and insulation against ground that is connected dc bus and operation planar is an important ring that guarantees electrolysis direct current production system safety.The method of monitoring electrolytic tank insulation against ground and DC bus system insulation against ground reduction or insulation breakdown is to adopt two voltage table series connection in the current electrolysis series, regularly manually observe two voltage tables whether the relative voltage between the electrolytic tank mid point is judged unusually whether electrolysis direct current system insulate well two voltage table neutral earthings by the operations staff, still complete, the practicable on-line insulation monitoring means of neither one.Particularly along with the electrolytic series scale constantly enlarges, increasing of electrolytic tank quantity, the series direct-current working volts are more and more higher, in order to guarantee the timely harm of finding insulation damages to production and personnel in the production engineering, realize that real-time online monitors that electrolytic tank insulation against ground and DC bus system insulation against ground are the ten minutes necessity.
At present, the method of monitoring electrolytic tank insulation against ground and DC bus system insulation against ground reduction or insulation breakdown is to adopt two voltage table series connection in the electrolytic series, regularly manually observe two voltage tables whether the relative voltage between the electrolytic tank mid point is judged unusually whether electrolysis direct current system insulate well two voltage table neutral earthings by the operations staff, can not in time pinpoint the problems, the safety of electrolysis production system can not get guaranteeing.
As shown in Figure 1, in order to monitor the cell insulation situation, three D.C. voltmeters 5 of installing on the centre panel of pulpit; Voltage table monitors complete series voltage V1, and voltage table V2 monitors half series voltage under normal operation; When needs are supervised the insulation situation of electrolytic tank, press test button 3, observing voltage V1 and V2 value; The explanation insulation is intact when V1=V2; Say electrolytic tank earth point again in left side when V1＜V2, rectifier notice potroom is handled the electrolytic tank of ground connection.The problem that this principle wiring exists is, can not realize that real-time online monitors the big bus insulation against ground of direct current situation, and this device can not in time be pinpointed the problems when the electrolytic tank neutral point insulation takes place reduces.Problem and defective that this electrolysis direct current series insulation monitoring system exists: need the tour personnel regularly to come check system whether to have problems, can not realize the situation of the big bus insulation against ground of in-service monitoring direct current constantly by button.
Summary of the invention
The invention provides a kind of electrolysis direct current system online insulated monitoring device and monitoring method for solving the problems of the technologies described above, purpose is an insulation status in the online timely monitoring system of energy, the trouble spot scope that can also provide electrolytic tank or dc bus insulation against ground to reduce or puncture simultaneously.
For reaching a kind of electrolysis direct current system online insulated monitoring device of above-mentioned purpose the present invention, be included in the 1st voltage transmitter and the 2nd voltage transmitter of the series connection of the big busbar voltage of electrolysis direct current two ends, the 5th voltage transmitter with the 1st voltage transmitter of connecting and the 2nd voltage transmitter parallel connection, be located at the electrolytic tank at the big busbar voltage of electrolysis direct current two ends, it is characterized in that described the 3rd voltage transmitter and the 4th voltage transmitter that is provided with series connection at the big busbar voltage of electrolysis direct current two ends, be provided with fuse between the big bus neutral point of the 1st voltage transmitter and the 2nd voltage transmitter and electrolytic series direct current, ground connection between the 3rd voltage transmitter and the 4th voltage transmitter, the 1st voltage transmitter, the 2nd voltage transmitter, the 3rd voltage transmitter, the 4th voltage transmitter and the 5th voltage transmitter output terminal and PLC input/output module, the PLC input/output module is connected with display screen.
Be provided with fuse between the two ends of described voltage transmitter and the big bus of direct current.
A kind of electrolysis direct current system online insulated monitoring method, when the magnitude of voltage that comprises the steps: to be input to the 3rd voltage transmitter in the PLC input/output module is not equal to the magnitude of voltage of the 4th voltage transmitter, and the change in voltage situation of the 3rd voltage transmitter is identical with the change in voltage of the 1st voltage transmitter, the change in voltage situation of the 4th voltage transmitter is identical with the change in voltage of the 2nd voltage transmitter, judges that then the electrolytic tank neutral point insulation takes place reduces; When the magnitude of voltage of the 3rd voltage transmitter during less than the magnitude of voltage of the 4th voltage transmitter, and the change in voltage situation of the 3rd voltage transmitter is different from the change in voltage of the 1st voltage transmitter, the change in voltage of different the 2nd voltage transmitters of the change in voltage situation of the 4th voltage transmitter judges that then the 3rd voltage transmitter side generation cell insulation reduces; May the insulate vat that reduces of the electrolytic tank scope that insulation reduces number is: (voltage of the 3rd voltage transmitter/4.2)=n1, the minigroove that reduces of may insulating number is: n2+2=n4, wherein: n2=(voltage of voltage transmitter-70-2.5)/4.2.
To insulate minigroove that the vat that reduces number and insulation reduce of described PLC input/output module number sends on the display screen.
Advantage of the present invention and effect are as follows: equipment and erected cost are all low; Displaying Meter is installed in the potroom, helps electrolysis procedure worker real time on-line monitoring, pinpoints the problems, and in time handles; Arrange new reasonable, safe and reliable to operation.In time reporting to the police under electrolytic tank insulation against ground and DC bus system insulation against ground reduction or the insulation breakdown situation or export the emergency stop valve trip signal in the real time on-line monitoring electrolytic series stops the Rectification Power Factor power supply, can tentatively judge the trouble spot scope that insulation reduces or punctures simultaneously.
Description of drawings
Fig. 1 is the schematic diagram of prior art.
Fig. 2 is a schematic diagram of the present invention.
Fig. 3 synoptic diagram that to be the PLC input/output module be connected with display screen with voltage transmitter.
Among the figure: 1, electrolytic tank; 2, fuse; 3, test button; 4, insulation reduces point; 5, voltage table; 6, PLC input/output module; 7, display screen; 8, the big bus of direct current; 9, the 1st voltage transmitter; 10, the 2nd voltage transmitter; 11, the 3rd voltage transmitter; 12, the 4th voltage transmitter; 13, the 5th voltage transmitter; Ud, the big busbar voltage of electrolysis direct current; 14, the big bus neutral point of electrolytic series direct current.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 2, a kind of electrolysis direct current system online insulated monitoring device of the present invention, be included in the 1st voltage transmitter 9 and the 2nd voltage transmitter 10 of the series connection of the big busbar voltage Ud of electrolysis direct current two ends, the 5th voltage transmitter 13 with the 1st voltage transmitter 9 of connecting and 10 parallel connections of the 2nd voltage transmitter, be located at the electrolytic tank 1 at the big busbar voltage of electrolysis direct current two ends, be connected with the big bus 8 of direct current between the big busbar voltage of electrolysis direct current and the electrolytic tank 1, be provided with the 3rd voltage transmitter 11 and the 4th voltage transmitter 12 of series connection at the big busbar voltage of electrolysis direct current two ends, be provided with fuse 2 between the 1st voltage transmitter 9 and the 2nd voltage transmitter 10 and the big bus neutral point 14 of electrolytic series direct current, ground connection between the 3rd voltage transmitter 11 and the 4th voltage transmitter 12, the 1st voltage transmitter 9, the 2nd voltage transmitter 10, the 3rd voltage transmitter 11, the 4th voltage transmitter 12 and the 5th voltage transmitter 13 output terminals and PLC input/output module 6, the 1st voltage transmitter 9, the 2nd voltage transmitter 10, the 3rd voltage transmitter 11, the signal of the 4th voltage transmitter 12 and the 5th voltage transmitter 13 outputs 4～20mA, PLC input/output module 6 is connected with display screen 7; Be provided with fuse 2 between the two ends of the big bus 8 of voltage transmitter and direct current.
Electrolytic tank between big bus neutral point 14 of electrolytic series direct current and the big busbar voltage Ud positive pole of electrolysis direct current is the positive bus-bar electrolytic tank, the numbering of positive bus-bar electrolytic tank from distance anodal nearest to the big bus neutral point of electrolytic series direct current be+1##～+ n; Electrolytic tank between big bus neutral point 14 of electrolytic series direct current and the big busbar voltage Ud negative pole of electrolysis direct current is the negative busbar electrolytic tank, the numbering of negative busbar electrolytic tank from the distance negative pole nearest to the big bus neutral point of electrolytic series direct current be-n～-1#.
A kind of electrolysis direct current system online insulated monitoring method comprises the steps: that every electrolytic bath average voltage is 4.18V, and voltage is raised to 70V when considering two electrolytic anode effects take place, when half series of busbars voltage is 2.5V; When the magnitude of voltage that is input to the 3rd voltage transmitter in the PLC input/output module is not equal to the magnitude of voltage of the 4th voltage transmitter, and the change in voltage situation of the 3rd voltage transmitter is identical with the change in voltage of the 1st voltage transmitter, the change in voltage situation of the 4th voltage transmitter is identical with the change in voltage of the 2nd voltage transmitter, judges that then the electrolytic tank neutral point insulation takes place reduces; When the magnitude of voltage of the 3rd voltage transmitter during less than the magnitude of voltage of the 4th voltage transmitter, and the change in voltage situation of the 3rd voltage transmitter is different from the change in voltage of the 1st voltage transmitter, the change in voltage of different the 2nd voltage transmitters of the change in voltage situation of the 4th voltage transmitter judges that then the 3rd voltage transmitter side generation cell insulation reduces; May the insulate vat that reduces of the electrolytic tank scope that insulation reduces number is: (voltage of the 3rd voltage transmitter/4.2)=n1, the minigroove that reduces of may insulating number is: n2+2=n4, wherein: n2=(voltage of voltage transmitter-70-2.5)/4.2.To insulate minigroove that the vat that reduces number and insulation reduce of PLC input/output module number sends on the display screen.
The groove scope that reduces point 4 so may insulate is: n4～n1.
Send alerting signal at rectifier, the groove scope that the maintainer reduces according to insulating just can estimate the approximate location of electrolytic tank or dc bus insulation damages roughly, then, and to the particular location of further searching insulation damages on the spot.
Claims (4)
1. electrolysis direct current system online insulated monitoring device, be included in the 1st voltage transmitter and the 2nd voltage transmitter of the series connection of the big busbar voltage of electrolysis direct current two ends, the 5th voltage transmitter with the 1st voltage transmitter of connecting and the 2nd voltage transmitter parallel connection, be located at the electrolytic tank at the big busbar voltage of electrolysis direct current two ends, it is characterized in that described the 3rd voltage transmitter and the 4th voltage transmitter that is provided with series connection at the big busbar voltage of electrolysis direct current two ends, be provided with fuse between the big bus neutral point of the 1st voltage transmitter and the 2nd voltage transmitter and electrolytic series direct current, ground connection between the 3rd voltage transmitter and the 4th voltage transmitter, the 1st voltage transmitter, the 2nd voltage transmitter, the 3rd voltage transmitter, the 4th voltage transmitter and the 5th voltage transmitter output terminal and PLC input/output module, the PLC input/output module is connected with display screen.
2. a kind of electrolysis direct current system online insulated monitoring device according to claim 1 is characterized in that being provided with fuse between the two ends of described voltage transmitter and the big bus of direct current.
3. a kind of electrolysis direct current system online insulated monitoring method according to claim 1, when the magnitude of voltage that it is characterized in that comprising the steps: to be input to the 3rd voltage transmitter in the PLC input/output module is not equal to the magnitude of voltage of the 4th voltage transmitter, and the change in voltage situation of the 3rd voltage transmitter is identical with the change in voltage of the 1st voltage transmitter, the change in voltage situation of the 4th voltage transmitter is identical with the change in voltage of the 2nd voltage transmitter, judges that then the electrolytic tank neutral point insulation takes place reduces; When the magnitude of voltage of the 3rd voltage transmitter during less than the magnitude of voltage of the 4th voltage transmitter, and the change in voltage situation of the 3rd voltage transmitter is different from the change in voltage of the 1st voltage transmitter, the change in voltage of different the 2nd voltage transmitters of the change in voltage situation of the 4th voltage transmitter judges that then the 3rd voltage transmitter side generation cell insulation reduces; May the insulate vat that reduces of the electrolytic tank scope that insulation reduces number is: the voltage/4.2=n1 of the 3rd voltage transmitter, and the minigroove that reduces of may insulating number is: n2+2=n4, wherein: the voltage-70-2.5/4.2 of n2=voltage transmitter.
4. a kind of electrolysis direct current system online insulated monitoring method according to claim 3, the minigroove that it is characterized in that insulating described PLC input/output module the vat that reduces number and insulation reduce number sends on the display screen.
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| CN2009100118426A CN101907680B (en) | 2009-06-04 | 2009-06-04 | Electrolysis direct current system online insulated monitoring device and a monitoring method |
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| CN102508136A (en) * | 2011-12-09 | 2012-06-20 | 江苏镇安电力设备有限公司 | Insulation monitoring method for IT (Isolation Terre) electric system with neutral conductor |
| CN103018641A (en) * | 2012-11-28 | 2013-04-03 | 沈阳铝镁设计研究院有限公司 | Insulation and voltage resistance experiment method of electrolytic direct-current system |
| CN103320815A (en) * | 2012-03-22 | 2013-09-25 | 贵阳铝镁设计研究院有限公司 | Electrolysis tank insulation detection apparatus |
| CN105463507A (en) * | 2014-09-22 | 2016-04-06 | 沈阳铝镁设计研究院有限公司 | Method and device for electrolytic tank smoke discharging pipeline valve electrostatic protection grounding of aluminum electrolytic plant |
| CN105738752A (en) * | 2016-04-20 | 2016-07-06 | 云南云铝涌鑫铝业有限公司 | Grounding detection apparatus and detection method for electrolytic DC system |
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| CN2862057Y (en) * | 2005-10-14 | 2007-01-24 | 安徽省电力科学研究院 | Insulated in-line monitoring system verifying device for high-voltage electrical equipment |
| CN100549240C (en) * | 2006-03-31 | 2009-10-14 | 沈阳铝镁设计研究院 | The solution of the antimagnetic eddy current of a kind of indoor type aluminium electrolysis commutator institute's direct current branch bus |
| CN1948975B (en) * | 2006-11-14 | 2011-04-06 | 沈阳铝镁设计研究院 | Apparatus and method for testing absolute resistance to ground of electrolytic tank series |
| KR20080082067A (en) * | 2007-03-07 | 2008-09-11 | (주)에디테크 | Development of breakdown position confirmation device |
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| CN201514438U (en) * | 2009-09-08 | 2010-06-23 | 沈阳铝镁设计研究院 | On-line insulation monitoring device of electrolytic direct current system |
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| CN102508136A (en) * | 2011-12-09 | 2012-06-20 | 江苏镇安电力设备有限公司 | Insulation monitoring method for IT (Isolation Terre) electric system with neutral conductor |
| CN103320815A (en) * | 2012-03-22 | 2013-09-25 | 贵阳铝镁设计研究院有限公司 | Electrolysis tank insulation detection apparatus |
| CN103018641A (en) * | 2012-11-28 | 2013-04-03 | 沈阳铝镁设计研究院有限公司 | Insulation and voltage resistance experiment method of electrolytic direct-current system |
| CN103018641B (en) * | 2012-11-28 | 2015-11-04 | 沈阳铝镁设计研究院有限公司 | Electrolysis direct current system voltage resistance experiment method |
| CN105463507A (en) * | 2014-09-22 | 2016-04-06 | 沈阳铝镁设计研究院有限公司 | Method and device for electrolytic tank smoke discharging pipeline valve electrostatic protection grounding of aluminum electrolytic plant |
| CN105463507B (en) * | 2014-09-22 | 2017-12-15 | 沈阳铝镁设计研究院有限公司 | The method and device of aluminium electrolysis shop electrolytic cell smoke discharging pipe valve anti-static grounding |
| CN106149001A (en) * | 2015-03-24 | 2016-11-23 | 沈阳铝镁设计研究院有限公司 | The measuring method of on-line measurement Current distribution in anode on anode large bus bar |
| CN106149001B (en) * | 2015-03-24 | 2017-12-15 | 沈阳铝镁设计研究院有限公司 | The measuring method of on-line measurement Current distribution in anode on anode large bus bar |
| CN105738752A (en) * | 2016-04-20 | 2016-07-06 | 云南云铝涌鑫铝业有限公司 | Grounding detection apparatus and detection method for electrolytic DC system |
| CN105738752B (en) * | 2016-04-20 | 2019-04-30 | 云南云铝涌鑫铝业有限公司 | Electrolysis direct current system ground detection device and detection method |
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