CN103745809B - With main transformer on-load switch on-line oil filter and the method for intelligent frequency-conversion function - Google Patents
With main transformer on-load switch on-line oil filter and the method for intelligent frequency-conversion function Download PDFInfo
- Publication number
- CN103745809B CN103745809B CN201410004650.3A CN201410004650A CN103745809B CN 103745809 B CN103745809 B CN 103745809B CN 201410004650 A CN201410004650 A CN 201410004650A CN 103745809 B CN103745809 B CN 103745809B
- Authority
- CN
- China
- Prior art keywords
- oil
- frequency
- main transformer
- conversion function
- oil pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 39
- 239000002245 particle Substances 0.000 claims description 23
- 239000012535 impurity Substances 0.000 claims description 21
- 239000007787 solid Substances 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 238000010891 electric arc Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The present invention relates to a kind of main transformer on-load switch on-line oil filter with intelligent frequency-conversion function and method, this device comprises the oil pump driven by variable-frequency motor and the grain density detector detected transformer oil in gasoline tank, the oil-in of described oil pump is connected with the oil inlet pipe be deep in gasoline tank, described oil inlet pipe is provided with oil inlet valve, the oil-out of described oil pump is connected with the flowline leading to gasoline tank, described flowline is provided with fuel-displaced valve, filtering tank and electro connecting pressure gauge, described electro connecting pressure gauge is connected to variable-frequency motor and pressure alarm, frequency converter and the grain density detector of described variable-frequency motor are electrically connected at control module.The present invention greatly can reduce rotating speed and the running time of loaded switch on-line oil filter oil pump, increases work efficiency, and reduces maintenance workload, particularly greatly can reduce the frequency of power cut that main transformer causes due to maintenance loaded switch on-line oil filter fault.
Description
Technical field
The present invention relates to loaded switch online oil filtration control field, especially a kind of main transformer on-load switch on-line oil filter with intelligent frequency-conversion function and method.
Background technology
Main transformer, in running, when load variations is to certain limit, needs the switching main transformer secondary winding tap using loaded switch to come not have a power failure to adapt to the change of load.Loaded switch contact is arranged on one with passing in and out oil pipe, being full of in the gasoline tank of transformer oil, when charged switching, transformer oil around contact sharply can heat and make it decompose generation free carbon particle by the high-temperature electric arc that loaded switch contact causes, these solid particles are suspended in oil, may cause that loaded switch burns, the serious accident of transformer tripping as removed not in time.The situation that tradition loaded switch on-line oil filter can not exist according to oily Free Carbon or other impurity particle carries out auto-controll operation, no matter impurity is how many, it is clean whether oil stream filters, its oil pump is all with high rotating speed, running at full capacity, the motor run up easily damages, and oil pump runs up for a long time, even if oily streaming system is when minor leakage occurs, all likely produce bubble, the heavy watt action of loaded switch Buchholz relay may be caused to cause the serious consequence of transformer tripping.
Summary of the invention
In view of this, the object of this invention is to provide a kind of main transformer on-load switch on-line oil filter with intelligent frequency-conversion function and method, overcome the defect of traditional main transformer on-load switch on-line oil filter.
To achieve these goals, technical scheme one of the present invention is a kind of main transformer on-load switch on-line oil filter with intelligent frequency-conversion function, comprise the oil pump driven by variable-frequency motor and the grain density detector that transformer oil in gasoline tank is detected, the oil-in of described oil pump is connected with the oil inlet pipe be deep in gasoline tank, described oil inlet pipe is provided with oil inlet valve, the oil-out of described oil pump is connected with the flowline leading to gasoline tank, described flowline is provided with fuel-displaced valve, filtering tank and electro connecting pressure gauge, described electro connecting pressure gauge is connected to variable-frequency motor and pressure alarm, frequency converter and the grain density detector of described variable-frequency motor are electrically connected at control module.
Further, be provided with on-load tap-changing equipment in described gasoline tank, the contact of described on-load tap-changing equipment soaks in transformer oil.
Further, described gasoline tank is connected with conservator, the tube connector of described conservator and gasoline tank is provided with Buchholz relay and conservator valve.
Further, described filtering tank is built with the filter medium filtering free carbon particle.
Further, described control module is single-chip microcomputer or PLC.
To achieve these goals, technical scheme two of the present invention is: a kind of main transformer on-load switch online oil filtration method with intelligent frequency-conversion function, the method application is as above with the main transformer on-load switch on-line oil filter of intelligent frequency-conversion function, (1) when loaded switch switches, because high-temperature electric arc causes the free carbon particle of generation in oil stream, detected by grain density detector, and transfer grain density signal to digital data transmission to control module; (2) when in oil stream, solid impurity grain density reaches settings, control module automatically starts oil pump and carries out online oil filtration; Along with the carrying out of oil strain work, in oil stream, solid impurity particle reduces gradually, and the electric machine frequency of oil pump also decreases; (3) when in oil stream, solid impurity particle reduces to set point, control module closes oil pump, stops online oil filtration; (4) when oily streaming system solid impurity is increased to again set point, above step (2) is repeated to (3).
Further, solid impurity particle is constantly blocked in filtering tank, continuous blocking filtering medium, fuel pump outlet pressure is constantly increased, when reaching the setup pressure value on electro connecting pressure gauge when pressure, the power supply of oil pump is cut off in electro connecting pressure gauge action, and opening pressure alarm equipment alarm, notifies that staff changes filter medium or filtering tank in time simultaneously.
Technique scheme controls the operation of on-line oil filter automatically by density particles contained in oil stream and granular size, and in oil stream, unit grain density is many, particle large, and frequency is high, and vice versa; When on-line oil filter is by when in loaded switch oil stream, contained solid impurity is filled into established standards, control module controls to close on-line oil filter automatically, and when solid impurity particle is increased to set point, control module controls to open on-line oil filter automatically.
Compared with prior art, the present invention has following beneficial effect: (1) the present invention starts because high-temperature electric arc causes the free carbon particle filtering of generation in oil stream clean when loaded switch can switch by on-line oil filter, the safe operation of guarantee main transformer.(2) the present invention greatly can reduce rotating speed and the running time of loaded switch on-line oil filter oil pump, increase work efficiency, reduce maintenance workload, particularly greatly can reduce the frequency of power cut that main transformer causes due to maintenance loaded switch on-line oil filter fault.(3) adopt technical scheme of the present invention, also can carry out quick transformation to existing loaded switch on-line oil filter, make full use of existing equipment and form resource reutilization, cost-saving while improving system effectiveness and stability.
For making object of the present invention, technical scheme and advantage clearly understand, below by specific embodiment and relevant drawings, the present invention will be described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the functional-block diagram of the embodiment of the present invention.
Fig. 3 is the control principle drawing of the embodiment of the present invention.
Fig. 4 is that low grain density stops control drawing automatically.
Fig. 5 is low grain density point control main wiring diagram.
Fig. 6 is that high grain density stops control drawing automatically.
Fig. 7 is high grain density point control main wiring diagram.
Fig. 8 is the automatic disable motor of high pressure points and alarm for opening control drawing.
Fig. 9 is that high pressure points controls main wiring diagram.
Figure 10 is grain density control drawing.
Figure 11 is that grain density controls frequency conversion main wiring diagram.
In figure: 1-oil pump outlet line, 2-filtering tank, 3-electro connecting pressure gauge, the fuel-displaced valve of 4-, 5-oil pump, 6-variable-frequency motor, 61-motor, 62-frequency converter, 7-oil inlet valve, 8-oil inlet pipe, 9-on-load tap-changing equipment, 10-transformer oil, 11-grain density detector, 12-gasoline tank, 13-Buchholz relay, 14-conservator valve, 15-conservator, 16-control module, 17-shaft coupling; K1, K2, K3, K4, K5-switch, DJ1-low grain density point limit relay, DJ2-high grain density point limit relay, DJ3-high pressure points limit relay, DJ4-grain density relay, C1, C2, C3, C4-A.C. contactor, FU-fuse, P-oil pump, N-ground connection, ~ 220V-alternating current 220V, ~ 380V-alternating current 380V.
Embodiment
As shown in Fig. 1 ~ 11, a kind of main transformer on-load switch on-line oil filter with intelligent frequency-conversion function, comprise the oil pump driven by variable-frequency motor and the grain density detector that transformer oil in gasoline tank is detected, described variable-frequency motor connects motor by a frequency converter and forms, the oil-in of described oil pump is connected with the oil inlet pipe be deep in gasoline tank, described oil inlet pipe is provided with oil inlet valve, the oil-out of described oil pump is connected with the flowline leading to gasoline tank, described flowline is provided with fuel-displaced valve, filtering tank and electro connecting pressure gauge, described electro connecting pressure gauge is connected to variable-frequency motor and pressure alarm, frequency converter and the grain density detector of described variable-frequency motor are electrically connected at control module.
In the present embodiment, this loaded switch on-line oil filter is mounted near main transformer on-load switch, is provided with on-load tap-changing equipment in described gasoline tank, and the contact of described on-load tap-changing equipment soaks in transformer oil.Described gasoline tank is connected with conservator, the tube connector of described conservator and gasoline tank is provided with Buchholz relay and conservator valve.Described filtering tank is built with the filter medium filtering free carbon particle.Described control module is single-chip microcomputer or PLC etc.
In the present embodiment, described fuel-displaced valve and oil inlet valve are normally open, only in oil pump, filtering tank maintenance or just closedown when changing.The unit grain density that described control module can detect according to grain density detector in oil stream and particle size, the automatic frequency controlling Oil pump electrical machinery in on-line oil filter, unit grain density is many, particle large, and frequency is high, and vice versa; When on-line oil filter is by when in loaded switch oil stream, contained solid impurity is filled into established standards, control module controls to close on-line oil filter automatically, and when solid impurity particle is increased to set point, control module controls to open on-line oil filter automatically.Described electro connecting pressure gauge can according to filtering tank filter medium be constantly filtered granular absorption saturated time, system pressure is caused constantly to raise, when pressure is raised to set force value, electro connecting pressure gauge closes oil pump and simultaneously opening pressure alarm equipment alarm automatically, and notice changes filter medium or filtering tank.
As shown in Fig. 1 ~ 7, a kind of main transformer on-load switch online oil filtration method with intelligent frequency-conversion function, the method application is as above with the main transformer on-load switch on-line oil filter of intelligent frequency-conversion function, (1) when on-load tap-changing equipment switches, because high-temperature electric arc can by loaded switch proximate contacts oil pyrolysis, produce free carbon, detected by grain density detector, and transfer grain density signal to digital data transmission to control module; (2) when the solid impurity grain densities such as oily streaming system Free Carbon reach settings, control module automatically starts oil pump and carries out online oil filtration; Along with the carrying out of oil strain work, the solid impurity particles such as free carbon that suspend in oily streaming system reduce gradually, and the electric machine frequency of oil pump also decreases; (3) when oily streaming system solid impurity particle reduces to set point, control module closes oil pump, stops online oil filtration; (4) when oily streaming system solid impurity is increased to again set point, above step (2) is repeated to (3).
In the present embodiment, impurity screening is constantly blocked in filtering tank, continuous blocking filtering medium, fuel pump outlet pressure is constantly increased, when reaching the setup pressure value on electro connecting pressure gauge when pressure, the power supply of oil pump is cut off in electro connecting pressure gauge action, and opening pressure alarm equipment alarm, notifies that staff changes filter medium or filtering tank in time simultaneously.
In the present embodiment, arranging within the scope of high and low grain density, frequency is from the linear relationship programming automatic control motor rotating speed of 0 to 50Hz.In Fig. 4, DJ1 is normally open, closed when arriving low grain density point, thus controls A.C. contactor C1 disconnection (C1 is normally off), disconnects oil pump power supply.In Fig. 6, DJ2 is normally open, closed when arriving high grain density point, thus controls A.C. contactor C2 closed (C2 is normally open), opens oil pump power supply.In Fig. 8, DJ3 is normally open, closed when arriving high pressure spot, thus controls A.C. contactor C3 disconnection (C3 is normally off), disconnects oil pump power supply, controls closed (C4 is normally open) the opening pressure alarm of A.C. contactor C4 simultaneously.In Figure 10, DJ4 is normally open, and closed when arrival arranges pellet density values, connect control module, control module chip presses the grain density program of design programming, controls the frequency of frequency conversion oil pump.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; be understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the main transformer on-load switch online oil filtration method with intelligent frequency-conversion function, it is characterized in that: the main transformer on-load switch on-line oil filter with intelligent frequency-conversion function of the method application comprises the oil pump driven by variable-frequency motor and the grain density detector detected transformer oil in gasoline tank, the oil-in of described oil pump is connected with the oil inlet pipe be deep in gasoline tank, described oil inlet pipe is provided with oil inlet valve, the oil-out of described oil pump is connected with the flowline leading to gasoline tank, described flowline is provided with fuel-displaced valve, filtering tank and electro connecting pressure gauge, described electro connecting pressure gauge is connected to variable-frequency motor and pressure alarm, frequency converter and the grain density detector of described variable-frequency motor are electrically connected at control module, (1) when loaded switch switches, because high-temperature electric arc causes the free carbon particle of generation in oil stream, detected by grain density detector, and transfer grain density signal to digital data transmission to control module, (2) when in oil stream, solid impurity grain density reaches settings, control module automatically starts oil pump and carries out online oil filtration, along with the carrying out of oil strain work, in oil stream, solid impurity particle reduces gradually, and the electric machine frequency of oil pump also decreases, (3) when in oil stream, solid impurity particle reduces to set point, control module closes oil pump, stops online oil filtration, (4) when oily streaming system solid impurity is increased to again set point, above step (2) is repeated to (3).
2. the main transformer on-load switch online oil filtration method with intelligent frequency-conversion function according to claim 1, it is characterized in that: solid impurity particle is constantly blocked in filtering tank, continuous blocking filtering medium, fuel pump outlet pressure is constantly increased, when reaching the setup pressure value on electro connecting pressure gauge when pressure, the power supply of oil pump is cut off in electro connecting pressure gauge action, and opening pressure alarm equipment alarm, notifies that staff changes filter medium or filtering tank in time simultaneously.
3. the main transformer on-load switch online oil filtration method with intelligent frequency-conversion function according to claim 1, is characterized in that: be provided with on-load tap-changing equipment in described gasoline tank, and the contact of described on-load tap-changing equipment soaks in transformer oil.
4. the main transformer on-load switch online oil filtration method with intelligent frequency-conversion function according to claim 1, is characterized in that: described gasoline tank is connected with conservator, the tube connector of described conservator and gasoline tank is provided with Buchholz relay and conservator valve.
5. the main transformer on-load switch online oil filtration method with intelligent frequency-conversion function according to claim 1, is characterized in that: described filtering tank is built with the filter medium filtering free carbon particle.
6. the main transformer on-load switch online oil filtration method with intelligent frequency-conversion function according to claim 1, is characterized in that: described control module is single-chip microcomputer or PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004650.3A CN103745809B (en) | 2014-01-06 | 2014-01-06 | With main transformer on-load switch on-line oil filter and the method for intelligent frequency-conversion function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004650.3A CN103745809B (en) | 2014-01-06 | 2014-01-06 | With main transformer on-load switch on-line oil filter and the method for intelligent frequency-conversion function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103745809A CN103745809A (en) | 2014-04-23 |
| CN103745809B true CN103745809B (en) | 2015-11-18 |
Family
ID=50502822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410004650.3A Active CN103745809B (en) | 2014-01-06 | 2014-01-06 | With main transformer on-load switch on-line oil filter and the method for intelligent frequency-conversion function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103745809B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113903558A (en) * | 2021-08-18 | 2022-01-07 | 广西电网有限责任公司电力科学研究院 | Uninterrupted oil change and oil filtering device for on-load voltage regulating switch of main transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070066380A (en) * | 2005-12-22 | 2007-06-27 | 대보전력기술 주식회사 | Transformer insulation oil filter system |
| CN202564023U (en) * | 2012-04-17 | 2012-11-28 | 郑州赛奥电子股份有限公司 | On-line oil filtering system of oil-immersed transformer |
| CN202677096U (en) * | 2012-03-31 | 2013-01-16 | 福建省电力有限公司南平电业局 | Oil processing and testing device for variable frequency multifunctional electric power |
| CN203312020U (en) * | 2013-05-13 | 2013-11-27 | 宁波启新电气科技有限公司 | Improved on-line oil filtering on-load tap switch |
| CN203799795U (en) * | 2014-01-06 | 2014-08-27 | 国家电网公司 | Main transformer load switch on-line oil filtering device with intelligent frequency converting function |
-
2014
- 2014-01-06 CN CN201410004650.3A patent/CN103745809B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070066380A (en) * | 2005-12-22 | 2007-06-27 | 대보전력기술 주식회사 | Transformer insulation oil filter system |
| CN202677096U (en) * | 2012-03-31 | 2013-01-16 | 福建省电力有限公司南平电业局 | Oil processing and testing device for variable frequency multifunctional electric power |
| CN202564023U (en) * | 2012-04-17 | 2012-11-28 | 郑州赛奥电子股份有限公司 | On-line oil filtering system of oil-immersed transformer |
| CN203312020U (en) * | 2013-05-13 | 2013-11-27 | 宁波启新电气科技有限公司 | Improved on-line oil filtering on-load tap switch |
| CN203799795U (en) * | 2014-01-06 | 2014-08-27 | 国家电网公司 | Main transformer load switch on-line oil filtering device with intelligent frequency converting function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103745809A (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202564023U (en) | On-line oil filtering system of oil-immersed transformer | |
| CN206921622U (en) | A kind of on-line automatic oil-filtering apparatus of on-load tap changers of transformers | |
| CN203799795U (en) | Main transformer load switch on-line oil filtering device with intelligent frequency converting function | |
| CN103745809B (en) | With main transformer on-load switch on-line oil filter and the method for intelligent frequency-conversion function | |
| CN202270423U (en) | Filtering device with oil-water separating function | |
| CN103165263A (en) | Transformer on-load tap-changer real-time online oil purifier | |
| CN202410317U (en) | Wireless control system for oil filters | |
| CN104184067A (en) | Crossover arc extinction device used during 10kV hot-line work and provided with indication function | |
| CN102226960B (en) | On-line oil filtering device | |
| CN203408554U (en) | Vacuum electric adsorption oil purifier | |
| CN202165351U (en) | Oil liquid filter device | |
| CN202796331U (en) | Load tap changer oil filter | |
| CN204792327U (en) | Intelligent on -load tap -changer absolute oil device | |
| CN209081813U (en) | The special equipment of furfural during a kind of removal insulation of electrical installation is oily | |
| CN202796330U (en) | Online oil filter device of load tap changer | |
| CN203060960U (en) | On-line oil filter for transformer substation | |
| CN203895228U (en) | Online oil purifying device for transformer on-load tap-charger | |
| CN201735253U (en) | Filtering device and turbine regulating device | |
| CN102436905A (en) | Quick replaceable oil storage cabinet moisture absorber device | |
| CN203312020U (en) | Improved on-line oil filtering on-load tap switch | |
| CN208174254U (en) | One kind being based on artificial zero passage direct current rapid on-off apparatus | |
| CN106768656B (en) | Cooler module leakage detection device | |
| CN202796327U (en) | Load tap changer oil filter structure | |
| CN202724858U (en) | Single-stage vacuum oil purifier | |
| CN206558316U (en) | Transformer oil filtering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |