CN101576552A - Device and method for online monitoring of gas in oil immersed electric apparatus oil - Google Patents
Device and method for online monitoring of gas in oil immersed electric apparatus oil Download PDFInfo
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- CN101576552A CN101576552A CNA2009100330265A CN200910033026A CN101576552A CN 101576552 A CN101576552 A CN 101576552A CN A2009100330265 A CNA2009100330265 A CN A2009100330265A CN 200910033026 A CN200910033026 A CN 200910033026A CN 101576552 A CN101576552 A CN 101576552A
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Abstract
The invention relates to a device and a method for online monitoring of gas in an oil immersed electric apparatus oil, in particular to a device for the online monitoring of the gas in the oil immersed electric apparatus (such as an oil immersed transformer, a reactor and the like) oil, which belongs to techniques for the online monitoring of the gas in a single-component theory transformer oil, namely certain characteristic gas such as hydrogen (H2) or acetylene (C2H2) and the like in the transformer oil is monitored or the concentration of a mixed gas in the oil mainly comprising the H2 is monitored so that the device achieves the monitoring on internal faults of the transformer and plays a role in early warning of faults. The device comprises an air chamber (7), a sensor unit (4), an electromagnetic valve (3), an air pump (6), a liquid crystal display screen (1), a power module (2), a control circuit (9), a human body inductive switch (12), an external layer machine case (16), a transparent display window (11) of the external layer machine case, an internal layer machine case (17), a rubber sealing gasket (13) and a rainproof screw shell (14). The device adopts a field bus mode to achieve that a plurality of devices communicate with one computer simultaneously.
Description
Technical field
The present invention relates to On-Line Monitor Device of Gas in a kind of immersed electric apparatus oil (as oil-immersed type transformer, reactor etc.) oil, it belongs to single component principle Gas in Oil of Transformer on-line monitoring technique, promptly monitor in the transformer oil as hydrogen (H2) or acetylene a certain characteristic gas such as (C2H2) or monitoring based on mixed gas concentration in the oil of H2, thereby reach the monitoring power transformer interior fault, play the fault pre-alarming effect.
Background technology
Power transformer is one of important operational outfit of electric system, and whether very big to the electric power netting safe running influence its normal operation is.From crash analysis, a lot of accidents are that local fault enlarges the burst accident that causes.But the criterion to equipment operation condition depends on the off-line preventive trial at present, because the preventive trial cycle is long, existing off-line monitoring project is insensitive to the developing fault reaction of insulation.And speed of development often can not find in time to the local defect in several weeks that at several days this local defect enlarges the accident that causes and account for larger proportion in the Accident of Transformer statistics in several weeks even shorter time.Therefore, transformer online monitoring has the advantage that off-line monitoring can not be compared, and the use of transformer online monitoring device is significant for timely discovery power transformer interior fault.
Both at home and abroad in the transformer single component principle Gas in Oil of Transformer on-line monitoring technique, adopt permeable membrane degassing refuelling battery detecting gas concentration principle mostly, hydran 201i product with General Electric Co. Limited is representative, and such monitor generally includes one and is installed on the signal transmitting device on the transformer valve, a control box and a user terminal software.There is following deficiency in such principle transmitter:
1. generally include parts such as permeable membrane, gas sensor, electronic unit and shell in the signal transmitting device, this permeable membrane can not bear negative pressure pressure, when on-the-spot application occasion is pumped as meeting with oil tank of transformer, the film damaged condition often takes place.
2. permeable membrane and gas sensor are the integrated design in the transmitter, and promptly the gas sensor front end is a permeable membrane, and gas sensor reaction baseline is all no longer adjusted after calibrating when dispatching from the factory debugging.But along with gas sensor increases service time, gas sensor reaction baseline will change, and promptly " zero wafts " benefit can not be calibrated automatically.
3. when such monitor is realized many equipment communications, need an external Communication Control case.Increase certain workload and difficulty on the one hand on-the-spot the installation, on the other hand, the use of Communication Control case increases field device hardware cost and complexity, has reduced the communication reliability to a certain extent.
4. the liquid crystal display mode is generally adopted in the on-the-spot demonstration of such monitor signal transmitting device, liquid crystal serviceable life is generally in several ten thousand hours, and it lights use at the scene for a long time, makes quicken to shorten original limited serviceable life, thereby influences the product whole service life.
5. such monitor external cable terminal box brings device integral protection grade to reduce attached to the cabinet outside.
Summary of the invention
Technical matters: the above-mentioned defective that the present invention is directed to prior art, On-Line Monitor Device of Gas and method in a kind of oil immersed electric apparatus oil are provided, solved on method that permeable membrane can not bear negative pressure in prior art and the product, the sensor baseline can not be calibrated automatically, the communication of many table apparatus needs the outer Communication Control case problem of joining, in the product Machine Design, adopt double-deck casing structure in addition, the external cable interface is built between the inside and outside cabinet, cable is introduced will be by being installed on rainproof screw shell on the device base plate, solve the existing product terminal box and be attached on the crust of the device, influenced product degree of protection and overall appearance problem.Design and installation one human induction switch on the outer cabinet of product is used for control and lights LCD, thereby prolongs LCD on-the-spot serviceable life.
Technical scheme: the invention solves in a kind of oil immersed electric apparatus oil gas on-line monitoring method and realized apparatus and method, solved the prior art problem on technical scheme aspect technical method and product structure design two, at first structurally: this device of the present invention comprises air chamber, sensor unit, solenoid valve, air pump, LCDs, power module, control circuit, human induction switch, outer cabinet, outer cabinet transparency display window, internal layer cabinet, rubber gasket, several parts of rainproof screw shell; Adopt stainless steel pipes to be connected between air chamber, sensor unit, solenoid valve and the air pump, the air chamber gas outlet is connected to the F2 import of solenoid valve, the F2 outlet of solenoid valve is connected to the import of air pump, the air pump outlet is connected to the import of sensor unit, the sensor unit outlet is joined with the F1 outlet of solenoid valve, and the F1 import of solenoid valve communicates with air.
Permeable membrane adopts " sandwich " form in the air chamber, a back up pad with holes on the permeable membrane both sides press from both sides respectively, supporting plate material is chosen as materials such as ceramic wafer, corrosion resistant plate, copper coin, aluminium sheet, back up pad thickness is that 0.5-3mm is thick, the pore size in hole is 0.5-3mm on the back up pad, and hole density is 85%.
Permeable membrane material adopts teflon, Kynoar, polyimide or teflonAF material in the air chamber; When permeable membrane adopted metal composite film, compound behind the metal reinforcement plate hight temperature sintering of permeable membrane and band micropore was one, is made into metal composite film.
This device for mechanical structure adopts double-decker, outer case front panel middle part is a transparency display window, the position is corresponding with the LCD on the internal layer cabinet, human body sensing Ji pass is installed in outer case front panel bottom, internal layer cabinet down is inserted in the outer cabinet, adopt the axial seal mode between them, outer chassis backplane openings of sizes and internal layer cabinet are measure-alike, be with flanging around the base plate opening, inner sphere mechanism box plate outside dimensions is identical with outer cabinet flanging outside dimensions, and left and right sides perforate is equipped with rainproof screw shell on the base plate; The inner sphere mechanism box plate and and outer chassis backplane between be encased inside the oil resistant rubber O-ring seal, O-ring seal thickness is 5cm, be inserted on the device base plate in four mounting holes with bolt, nut is inserted on the bolt and tight ectonexine cabinet, fix a ring flange at the device plate outer side, adopt the ring flange docking mode to be installed on the oil tank of transformer on the valve.
The control circuit upper connecting terminal directly passes internal layer cabinet side, external cable comprises feed cable and Capacitance Unbalance in Telecom Cables, after penetrating rainproof screw shell on the inner sphere mechanism box plate from the outside, pass that lateral space directly is screwed in the control circuit board terminal between the inside and outside layer cabinet, after the device installation, rainproof screw shell dextrorotation tightened play sealing function.
To gas detection flow process in the oil be: air chamber is realized collecting and preserving to gas in the oil immersed electric apparatus oil earlier, before each the measurement, the F1 import of elder generation's opens solenoid valve, allow sensor measure aerial reacting value earlier, realize adjustment, in the time will carrying out gas detection baseline wander, close the F1 import of solenoid valve, the F2 import and the air pump of opens solenoid valve, air pump is measured gas extraction in the air chamber to sensor, and measurement is closed solenoid valve and air pump after finishing; Adopt the fieldbus mode, realize the many table apparatus whiles and computing machine means of communication, the fieldbus mode is RS485, Ethernet, CAN or LAN mode, and communications protocol adopts modbus, probus stipulations.
Beneficial effect: the invention solves the problem that existing product and technological penetration film can not resist negative pressure; Baseline is adjusted automatically before having realized the each measurement of sensor; Built-inization of device communication interface cancelled external Communication Control case, adopts the field bus communication technology, can conveniently realize the multi computer communication technology of many table apparatus and computing machine.Device adopts human induction switch control to light LCD, has prolonged liquid crystal display serviceable life at the scene greatly.On the product Design of Mechanical Structure, adopt double-deck cabinet design form, internal layer cabinet down is inserted in the outer cabinet to be installed, adopt the axial seal mode between them, external cable is introduced wiring between the inside and outside layer cabinet by rainproof screw shell simultaneously, this kind Design of Mechanical Structure has improved device integral protection grade and aesthetic property to built-inization of cable coupling box in the existing product, makes device be suitable for outdoor long-time running.
Description of drawings
Below in conjunction with drawings and Examples invention is further specified.
Fig. 1 is a cut-away view of the present invention.
Have among the figure: LCDs 1, control circuit 2, solenoid valve 3, sensor 4 connects stainless steel pipes 5, air pump 6, air chamber 7, ring flange 8, control circuit connection terminal 9, introduce external cable 10, crust of the device transparency display window 11, human induction switch 12, sealing rubber pad 13, rainproof screw shell 14, bolt 15.
Embodiment
On-Line Monitor Device of Gas is made up of air chamber 7, sensor unit 4, solenoid valve 3, air pump 6, LCDs 1, power module 2, control circuit 9, human induction switch 12, outer cabinet 16, outer cabinet transparency display window 11, internal layer cabinet 17, rubber gasket 13, rainproof screw shell 14 etc. in the oil immersed electric apparatus oil of the present invention.
Adopt stainless steel pipes to be connected between air chamber, sensor unit, solenoid valve and the air pump, annexation is the F2 import that air chamber 7 gas outlets are connected to solenoid valve 3, the F2 outlet of solenoid valve 3 is connected to the import of air pump 6, air pump 6 outlets are connected to the import of sensor unit 4, sensor unit 4 outlets are joined with the F1 outlet of solenoid valve 3, and the F1 import of solenoid valve 3 communicates with air.Annexation is the F2 import that air chamber 7 gas outlets are connected to solenoid valve 3, the F2 outlet of solenoid valve 3 is connected to the import of air pump 6, air pump 6 outlets are connected to the import of sensor unit 4, and sensor unit 4 outlets are joined with the F1 outlet of solenoid valve 3, and the F1 import of solenoid valve 3 communicates with air.Stainless steel pipes can adopt external diameter 2-3mm, and internal diameter 1-2mm specification adopts nut to add the seal with O ring mode between pipeline and the above-mentioned device.Power module provides the control circuit working power in the electronic unit, and assemblies such as LCD MODULE, human induction switch, sensor unit, solenoid valve, air pump are connected with control circuit IO mouth respectively.
Apparatus of the present invention motion flow is: air chamber 7 is realized collecting and preserving to gas in the oil immersed electric apparatus oil earlier, before each the measurement, open 3 solenoid valve F1 earlier, allow sensor 4 measure aerial reacting value earlier, realize adjustment, in the time will carrying out gas detection baseline wander, close 3 solenoid valve F1, open 3 solenoid valve F2 and air pump 6, air pump 6 is measured gas extraction in the air chamber 7 to sensor 4, and measurement is closed solenoid valve 3 and air pump 6 after finishing.Air chamber carries out in next time the oil gas to be collected, and the gas detection flow process repeats above process.
The permeable membrane that is adopted in the air chamber 7 can adopt the metal composite form membrane, as production program in the patent 200520070133.2, compound behind the metal reinforcement plate hight temperature sintering of permeable membrane and band micropore is one, is made into metal composite film, strengthen the permeable membrane resistance to pressure, made it to bear negative pressure pressure; Permeable membrane is as adopting the individual layer mantle, optionally material has materials such as teflon, Kynoar, polyimide, teflonAF, mounting structure can adopt " sandwich " form, an i.e. back up pad with holes on the permeable membrane both sides press from both sides respectively, supporting plate material may be selected to be ceramic wafer, corrosion resistant plate, copper coin, aluminium sheet etc. and other inert metal materials, back up pad thickness is that 0.5-3mm is thick, and the pore size in hole is 0.5-3mm on the back up pad, and hole density is 85%.
Apparatus of the present invention directly are built in communication interface in the local supervising and measuring equipment, the device casing structure is a double-decker, shown in Fig. 1 product structure synoptic diagram, transparency display window is installed on outer case front panel middle part, and human induction switch is installed on outer case front panel bottom.Device internal layer cabinet camphane is inserted in the outer cabinet to be installed, adopt the axial seal mode between them, the inner sphere mechanism box plate and and outer chassis backplane between be encased inside the oil resistant rubber O-ring seal, O-ring seal thickness is 5cm, be inserted on the device base plate in four mounting holes with bolt, nut is inserted on the bolt and tight ectonexine cabinet, reaches sealing effectiveness.
During on-the-spot the installation, external cable comprises feed cable and Capacitance Unbalance in Telecom Cables, after they penetrate the rainproof screw shell that is installed on the chassis backplane from the outside, passes directly that lateral space is screwed in the control circuit board terminal between the inside and outside layer cabinet.After the product installation, rainproof screw shell dextrorotation tightened play sealing function.
The present invention bears on the negative pressure problem at the solution permeable membrane, the employing method is that the permeable membrane in the film degas module adopts metal composite film or " sandwich " structure, membrane structure can adopt the metal composite form membrane, as production program in the patent 200520070133.2, compound behind the metal reinforcement plate hight temperature sintering of permeable membrane and band micropore is one, be made into metal composite film, strengthened the permeable membrane resistance to pressure, make it to bear negative pressure pressure; Permeable membrane is as adopting the individual layer mantle, optionally material has materials such as teflon, Kynoar, polyimide, teflonAF, mounting structure can adopt " sandwich " form, an i.e. back up pad with holes on the permeable membrane both sides press from both sides respectively, supporting plate material may be selected to be materials such as ceramic wafer, corrosion resistant plate, copper coin, aluminium sheet, back up pad thickness is that 0.5-3mm is thick, and the pore size in hole is 0.5-3mm on the back up pad, and hole density is 85%.No matter adopt one of above-mentioned two kinds of methods, permeable membrane all can anti-negative pressure to-more than the 0.2Mpa, anti-positive pressure is increased to more than the 0.5Mpa, does not cause the possibility of damage to significantly reduce by force because of the permeable membrane anti-pressure ability in the on-the-spot utilization.Permeable membrane is installed in the air chamber of internal layer cabinet, and air chamber can be realized the collection to gas in the oil immersed electric apparatus oil.
Existing hydran 201i product and technology, sensor unit and air chamber unit are the integrated design, and infiltrate gas and do not collect and preserve from oil, participate in the sensor unit reaction directly, sensor unit does not contact with air, can't adjust " zero wafts " automatically.The present invention adopts air chamber and sensor unit separate design form, between sensor unit and air chamber unit, increase a solenoid valve and micro air pump, on detecting principle and method, be adjusted into: air chamber earlier to oil immersed electric apparatus oil in gas realize collecting and preservation, before each the measurement, the opens solenoid valve F1 of elder generation, allow sensor measure aerial reacting value earlier, realization is to the adjustment of baseline wander, in the time will carrying out gas detection, close solenoid valve F1, opens solenoid valve F2 and air pump, air pump is measured gas extraction in the air chamber to sensor.
Apparatus of the present invention directly are built in communication interface in the local supervising and measuring equipment, cancelled the Communication Control case in the hydran 201i product, field bus technique is adopted in communication, bus mode can be modes such as RS485, Ethernet, CAN, LAN, communications protocol can adopt stipulations such as modbus, probus, can conveniently realize many table apparatus and daemon software multi computer communication technology.The communication modes that the present invention adopts has been simplified the constituted mode of product greatly, has improved the communication reliability to a certain extent, and the present invention can realize on-the-spot 32 a table apparatus while and a computer communication technology.
Apparatus of the present invention to gas detection principle in the oil immersed electric apparatus oil are: air chamber is realized collecting and preserving to gas in the oil immersed electric apparatus oil earlier, before each the measurement, the opens solenoid valve F1 of elder generation, allow sensor measure aerial reacting value earlier, realize adjustment, in the time will carrying out gas detection baseline wander, close solenoid valve F1, opens solenoid valve F2 and air pump, air pump is measured gas extraction in the air chamber to sensor, and measurement is closed solenoid valve and air pump after finishing.Air chamber carries out in next time the oil gas to be collected, and the gas detection flow process repeats above process.
The present invention takes technical scheme to be on the device for mechanical structural design: double-decker is adopted in the design of device cabinet, shown in Fig. 1 product structure synoptic diagram, outer case front panel middle part is a transparency display window, LCD on the just corresponding internal layer cabinet of design attitude is used to observe device shown reading on the liquid crystal.Human induction switch is installed in outer case front panel bottom, and the device LCD is controlled by human induction switch, and in the time of within human body is positioned at the positive 1 meter scope of device, it is approaching that human induction switch has been sensed human body automatically, puts brightness liquid crystal display screen automatically.Except that personnel arrive the scene, liquid crystal all is in dormant state in most of working time at ordinary times, thereby has prolonged liquid crystal serviceable life greatly.
Double-decker is adopted in the design of apparatus of the present invention casing structure, outer cabinet shape can be designed to column type, ellipse, oval both sides and wear outward appearances such as flanging, rectangle, rhombus, outer chassis backplane openings of sizes and internal layer cabinet are measure-alike, are with flanging around the base plate opening.The inner sphere mechanism box shape can be designed to column type, rectangle etc., and right flank is for installing base plate among the figure, and the base plate outside dimensions is identical with outer cabinet flanging outside dimensions, and left and right sides perforate is equipped with rainproof screw shell on the base plate.
Apparatus of the present invention sealing means is that internal layer cabinet down is inserted in installation in the outer cabinet, adopt the axial seal mode between them, the inner sphere mechanism box plate and and outer chassis backplane between be encased inside the oil resistant rubber O-ring seal, O-ring seal thickness is 5cm, be inserted on the device base plate in four mounting holes with bolt, nut is inserted on the bolt and tight ectonexine cabinet, reaches sealing effectiveness.Fix a ring flange at the device plate outer side, device adopts ring flange Butt sealing mode to be installed on the oil tank of transformer on the valve, realizes the detection to gas in the oil.
Apparatus of the present invention external cable introducing mode is that the control circuit board upper connecting terminal directly passes internal layer cabinet side.As illustrating the mode of connection among Fig. 1, external cable comprises feed cable and Capacitance Unbalance in Telecom Cables, after cable penetrates rainproof screw shell on the chassis backplane from the outside, passes that lateral space directly is screwed in the control circuit board terminal between the inside and outside layer cabinet.After the product installation, rainproof screw shell dextrorotation tightened play sealing function.The as above design of measure between the outer cage, neither influences the device overall aesthetics in just the external cable interface being built in fully, has improved product integral protection grade again.After apparatus of the present invention were installed on the scene, degree of protection can arrive more than the IP65.
Claims (6)
1. On-Line Monitor Device of Gas in the oil immersed electric apparatus oil is characterized in that this device comprises air chamber (7), sensor unit (4), solenoid valve (3), air pump (6), LCDs (1), power module (2), control circuit (9), human induction switch (12), outer cabinet (16), outer cabinet transparency display window (11), internal layer cabinet (17), rubber gasket (13), several parts of rainproof screw shell (14); Adopt stainless steel pipes to be connected between air chamber (7), sensor unit (4), solenoid valve (3) and the air pump (6), air chamber (7) gas outlet is connected to the F2 import of solenoid valve (3), the F2 outlet of solenoid valve (3) is connected to the import of air pump (6), air pump (6) outlet is connected to the import of sensor unit (4), sensor unit (4) outlet is joined with the F1 outlet of solenoid valve (3), and the F1 import of solenoid valve (3) communicates with air.
2. On-Line Monitor Device of Gas in the oil immersed electric apparatus oil according to claim 1, it is characterized in that permeable membrane adopts " sandwich " form in the air chamber (7), a back up pad with holes on the permeable membrane both sides press from both sides respectively, supporting plate material is chosen as ceramic wafer, corrosion resistant plate, copper coin, aluminium sheet, back up pad thickness is that 0.5-3mm is thick, the pore size in hole is 0.5-3mm on the back up pad, and hole density is 85%.
3. On-Line Monitor Device of Gas in the oil immersed electric apparatus oil according to claim 1 and 2 is characterized in that permeable membrane material adopts teflon, Kynoar, polyimide or teflonAF material in the air chamber (7); When permeable membrane adopted metal composite film, compound behind the metal reinforcement plate hight temperature sintering of permeable membrane and band micropore was one, is made into metal composite film.
4. On-Line Monitor Device of Gas in the oil immersed electric apparatus oil according to claim 1, it is characterized in that this device for mechanical structure adopts double-decker, outer cabinet (16) front panel middle part is transparency display window (11), the position is corresponding with the LCD (1) on the internal layer cabinet (17), human induction switch (12) is installed in outer cabinet (16) front panel bottom, internal layer cabinet (17) down is inserted in the outer cabinet (16), adopt the axial seal mode between them, outer cabinet (16) base plate openings of sizes and internal layer cabinet (17) are measure-alike, be with flanging around the base plate opening, internal layer cabinet (17) base plate outside dimensions is identical with outer cabinet (16) flanging outside dimensions, and left and right sides perforate is equipped with rainproof screw shell (14) on the base plate; Internal layer cabinet (17) base plate and and outer cabinet (16) base plate between be encased inside oil resistant rubber O-ring seal (13), O-ring seal thickness is 5cm, be inserted on the device base plate in four mounting holes with bolt (15), nut is inserted on the bolt and tight ectonexine cabinet (16), fix a ring flange (8) at the device plate outer side, adopt the ring flange docking mode to be installed on the oil tank of transformer on the valve.
5. On-Line Monitor Device of Gas in the oil immersed electric apparatus oil according to claim 1, it is characterized in that control circuit (9) upper connecting terminal directly passes internal layer cabinet (17) side, external cable comprises feed cable and Capacitance Unbalance in Telecom Cables, after penetrating rainproof screw shell (14) on internal layer cabinet (17) base plate from the outside, pass that lateral space directly is screwed in the control circuit board terminal (9) between the inside and outside layer cabinet, after the device installation, rainproof screw shell (14) dextrorotation tightened play sealing function.
6. the on-line monitoring method of On-Line Monitor Device of Gas in the oil immersed electric apparatus oil as claimed in claim 1, it is characterized in that to gas detection flow process in the oil being: air chamber (7) is realized collecting and preserving to gas in the oil immersed electric apparatus oil earlier, before each the measurement, the F1 import of elder generation's opens solenoid valve (3), allow sensor (4) measure aerial reacting value earlier, realization is to the adjustment of baseline wander, in the time will carrying out gas detection, close the F1 import of solenoid valve (3), the F2 import of opens solenoid valve (3) and air pump (6), air pump (6) is measured gas extraction in the air chamber (7) to sensor (4), measurement is closed solenoid valve (3) and air pump (6) after finishing; Adopt the fieldbus mode, realize the many table apparatus whiles and computing machine means of communication, the fieldbus mode is RS485, Ethernet, CAN or LAN mode, and communications protocol adopts modbus, probus stipulations.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100330265A CN101576552A (en) | 2009-06-05 | 2009-06-05 | Device and method for online monitoring of gas in oil immersed electric apparatus oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100330265A CN101576552A (en) | 2009-06-05 | 2009-06-05 | Device and method for online monitoring of gas in oil immersed electric apparatus oil |
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| CNA2009100330265A Pending CN101576552A (en) | 2009-06-05 | 2009-06-05 | Device and method for online monitoring of gas in oil immersed electric apparatus oil |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998420A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | Online monitoring device for gas in transformer oil |
| CN103116089A (en) * | 2013-01-16 | 2013-05-22 | 湖北省电力公司电力科学研究院 | Converter transformer state judgment method capable of eliminating factors of conversion selector |
| CN103748438A (en) * | 2011-03-31 | 2014-04-23 | 品质控制有限责任公司 | Combined hydrogen and pressure sensor assembly |
| CN106769653A (en) * | 2016-11-16 | 2017-05-31 | 国网山东省电力公司新泰市供电公司 | A kind of system and method for quick detection transformer fault |
| CN107727797A (en) * | 2017-05-02 | 2018-02-23 | 国家电网公司 | Multi-function gas relay gas recovery test device |
| CN109806534A (en) * | 2019-03-11 | 2019-05-28 | 北京紫光新锐科技发展有限公司 | A kind of end water testing device and method |
| CN111896355A (en) * | 2020-06-28 | 2020-11-06 | 中铁第一勘察设计院集团有限公司 | Transformer online monitoring device and transformer online monitoring method |
| CN112034088A (en) * | 2020-09-15 | 2020-12-04 | 国网河南省电力公司检修公司 | Transformer fault gas monitoring equipment |
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| CN2687687Y (en) * | 2004-04-09 | 2005-03-23 | 宁波理工监测设备有限公司 | Membrane oil-gas separating device for transformer on-line monitoring |
| CN2816808Y (en) * | 2005-07-06 | 2006-09-13 | 苏州工业园区广福汽保机电设备有限公司 | Automobile tail-gas detecting device |
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| CN2687687Y (en) * | 2004-04-09 | 2005-03-23 | 宁波理工监测设备有限公司 | Membrane oil-gas separating device for transformer on-line monitoring |
| CN2816808Y (en) * | 2005-07-06 | 2006-09-13 | 苏州工业园区广福汽保机电设备有限公司 | Automobile tail-gas detecting device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103748438A (en) * | 2011-03-31 | 2014-04-23 | 品质控制有限责任公司 | Combined hydrogen and pressure sensor assembly |
| CN103748438B (en) * | 2011-03-31 | 2016-03-30 | 品质控制有限责任公司 | Combined type hydrogen and pressure sensor assembly |
| CN102998420A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | Online monitoring device for gas in transformer oil |
| CN103116089A (en) * | 2013-01-16 | 2013-05-22 | 湖北省电力公司电力科学研究院 | Converter transformer state judgment method capable of eliminating factors of conversion selector |
| CN103116089B (en) * | 2013-01-16 | 2015-02-04 | 湖北省电力公司电力科学研究院 | Converter transformer state judgment method capable of eliminating factors of conversion selector |
| CN106769653A (en) * | 2016-11-16 | 2017-05-31 | 国网山东省电力公司新泰市供电公司 | A kind of system and method for quick detection transformer fault |
| CN107727797A (en) * | 2017-05-02 | 2018-02-23 | 国家电网公司 | Multi-function gas relay gas recovery test device |
| CN107727797B (en) * | 2017-05-02 | 2023-11-28 | 国家电网公司 | Multifunctional gas recovery test device for gas relay |
| CN109806534A (en) * | 2019-03-11 | 2019-05-28 | 北京紫光新锐科技发展有限公司 | A kind of end water testing device and method |
| CN111896355A (en) * | 2020-06-28 | 2020-11-06 | 中铁第一勘察设计院集团有限公司 | Transformer online monitoring device and transformer online monitoring method |
| CN112034088A (en) * | 2020-09-15 | 2020-12-04 | 国网河南省电力公司检修公司 | Transformer fault gas monitoring equipment |
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