CN113274803A - Oil filtering system and method based on transformer on-load switch - Google Patents
Oil filtering system and method based on transformer on-load switch Download PDFInfo
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- CN113274803A CN113274803A CN202110604142.9A CN202110604142A CN113274803A CN 113274803 A CN113274803 A CN 113274803A CN 202110604142 A CN202110604142 A CN 202110604142A CN 113274803 A CN113274803 A CN 113274803A
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- 238000001914 filtration Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 52
- 238000007872 degassing Methods 0.000 claims abstract description 19
- 230000018044 dehydration Effects 0.000 claims abstract description 19
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 19
- 238000009298 carbon filtering Methods 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 238000012806 monitoring device Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/147—Bypass or safety valves
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Transformer Cooling (AREA)
Abstract
The application discloses oil filtering system and method based on transformer on-load switch, and the system includes: the oil filtering pipeline module comprises a three-way valve, an on-load oil inlet pipe joint and an on-load oil outlet pipe joint, and the three-way valve comprises a first three-way valve and a second three-way valve; the free carbon filtering module comprises two filter elements connected in parallel, a control valve group and pressure monitoring equipment, wherein the control valve group is connected with the filter elements, and the pressure monitoring equipment is used for monitoring the pressure of the filter elements; the dehydration and degassing module comprises a vacuum tank, an oil-gas separator and a vacuum pump, wherein the vacuum tank comprises a heater, and the oil-gas separator is connected between the vacuum pump and the vacuum tank; the oil discharge monitoring module comprises an oil discharge pump and a flow rate meter, and is respectively connected with the three-way valve and the dehydration and degassing module. The application solves the technical problems that the existing oil filtering technology destroys the tightness of a load switch and blocks an oil filter, so that the actual oil filtering process is influenced and the service life of the oil filter is lost.
Description
Technical Field
The application relates to the technical field of transformer oil filtering, in particular to an oil filtering system and method based on a transformer on-load switch.
Background
The transformer oil plays the roles of insulation, arc extinction and cooling in the load switch. In recent years, unqualified defects of a first pre-testing oil test after the on-load switch hanging core of a transformer is overhauled and put into operation frequently appear, the defects are mainly represented by micro-water increase, the voltage withstanding test of transformer oil is unqualified, the transformer oil needs to be replaced by power failure, the availability ratio and the power supply reliability of the transformer are seriously influenced, and the transformer oil is wasted.
The dehydration and degassing are generally processed by adopting a vacuum oil filter, but the vacuum oil filters produced and used by vacuum oil filter production plants, power enterprises and power construction units aim at oil filtering of a transformer body, the power and the oil filtering speed of the vacuum oil filter are too high for the oil filtering of the load switch, the pressure of an outlet pipeline of the oil filter is too high when the vacuum oil filter is used for the load switch, the sealing of the load switch is damaged, the risk of damaging the load switch exists, and the service life of the oil filter is shortened. If be used for electrified oil strain, still produce transformer oil surge easily and lead to the heavy gas of on-load switch and move the tripping operation by mistake, have great risk. In addition, the oil arc extinguishing on-load switch transformer oil contains a large amount of free carbon, so that a filter element of an oil filter is easily blocked, the filter element of the oil filter needs to be cleaned and replaced in the oil filtering process, and the oil filtering process is interrupted.
Disclosure of Invention
The application provides an oil filtering system and method based on a transformer on-load switch, which are used for solving the technical problems that the existing oil filtering technology damages the tightness of the on-load switch and blocks an oil filter, so that the actual oil filtering process is influenced and the service life of the oil filter is lost.
In view of this, the present application provides in a first aspect an oil filtering system based on a transformer on-load switch, including: the device comprises an oil filtering pipeline module, a free carbon filtering module, a dehydration and degassing module and an oil discharge monitoring module;
the oil filtering pipeline module comprises a three-way valve, an on-load oil inlet pipe joint and an on-load oil outlet pipe joint, and the three-way valve comprises a first three-way valve and a second three-way valve;
the free carbon filtering module comprises two filter elements connected in parallel, a control valve group and pressure monitoring equipment, wherein the control valve group is connected with the filter elements, and the pressure monitoring equipment is used for monitoring the pressure of the filter elements;
the dehydration and degassing module comprises a vacuum tank, an oil-gas separator and a vacuum pump, wherein the vacuum tank comprises a heater, and the oil-gas separator is connected between the vacuum pump and the vacuum tank;
the oil discharge monitoring module comprises an oil discharge pump and a flow rate meter, and the oil discharge monitoring module is respectively connected with the three-way valve and the dehydration and degassing module.
Optionally, the loaded oil inlet pipe joint in the oil filtering pipeline module is connected with the first port of the first three-way valve, and the loaded oil outlet pipe joint is connected with the first port of the second three-way valve;
the second port of the first three-way valve is connected with the second port of the second three-way valve;
the third port of the first three-way valve is connected with the output end of the oil discharge monitoring module;
and a third port of the second three-way valve is connected with the input end of the free carbon filtering module.
Optionally, the pressure monitoring device in the free carbon filtration module comprises a tank inlet pressure monitoring device and a tank outlet pressure monitoring device;
the tank inlet pressure monitoring equipment is connected with the input end of the filter element through a first control valve in the control valve group;
and the tank outlet pressure monitoring equipment is connected with the output end of the filter element through a second control valve in the control valve group.
Optionally, the tank outlet pressure monitoring device is further connected to the vacuum tank in the dehydration and degassing module through a third control valve.
Optionally, the flow meter is connected in series between the oil discharge pump and the three-way valve.
The application provides an oil filtering method based on transformer on-load switch in a second aspect, and the method comprises the following steps:
carrying out free carbon filtration operation on transformer oil to be treated through a preset filter element, and simultaneously monitoring the oil pressure entering and exiting the preset filter element to obtain primary filtered oil;
removing gas from the primary filtered oil, and evaporating water in the primary filtered oil to obtain target filtered oil;
and monitoring the oil flow speed value of the target filtered oil transmitted to the on-load switch pipeline in real time, and regulating and controlling the actual oil flow speed according to the oil flow speed value and the oil flow threshold value.
According to the technical scheme, the embodiment of the application has the following advantages:
in this application, an oil strain system based on transformer on-load switch is provided, includes: the oil filtering pipeline module comprises a three-way valve, an on-load oil inlet pipe joint and an on-load oil outlet pipe joint, and the three-way valve comprises a first three-way valve and a second three-way valve; the free carbon filtering module comprises two filter elements connected in parallel, a control valve group and pressure monitoring equipment, wherein the control valve group is connected with the filter elements, and the pressure monitoring equipment is used for monitoring the pressure of the filter elements; the dehydration and degassing module comprises a vacuum tank, an oil-gas separator and a vacuum pump, wherein the vacuum tank comprises a heater, and the oil-gas separator is connected between the vacuum pump and the vacuum tank; the oil discharge monitoring module comprises an oil discharge pump and a flow rate meter, and is respectively connected with the three-way valve and the dehydration and degassing module.
According to the oil filtering system based on the transformer on-load switch, the filter element can be replaced without power failure through the two filter elements connected in parallel in the free carbon filtering module, the phenomenon that oil filtering is interrupted when the machine is stopped is avoided, and the pressure monitoring equipment can monitor the oil pressure flowing through the filter elements, so that whether the filter elements are blocked or not is judged; the oil discharge monitoring module can monitor the oil flow speed according to the flow rate meter, the oil discharge pump can control the oil flow speed, and the problem that the on-load switch oil filter pipeline pressure is too large to destroy the on-load switch tightness is avoided. Therefore, the technical problems that the existing oil filtering technology breaks the tightness of a load switch and blocks an oil filter to cause the actual oil filtering process to be influenced and the service life of the oil filter to be lost can be solved.
Drawings
Fig. 1 is a schematic structural diagram of an oil filtering system based on a transformer on-load switch according to an embodiment of the present application;
fig. 2 is a schematic flow chart of an oil filtering method based on a transformer on-load switch according to an embodiment of the present application;
reference numerals:
an oil filtering pipeline module 1; a free carbon filtration module 2; a dehydration and degassing module 3; and an oil discharge monitoring module 4.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For ease of understanding, referring to fig. 1, an embodiment of an oil filtering system based on a transformer load switch provided in the present application includes: the device comprises an oil filtering pipeline module 1, a free carbon filtering module 2, a dehydration and degassing module 3 and an oil discharge monitoring module 4.
The oil filtering pipeline module 1 comprises a three-way valve, an on-load oil inlet pipe joint and an on-load oil outlet pipe joint, and the three-way valve comprises a first three-way valve and a second three-way valve. The on-load oil inlet pipe joint and the on-load oil outlet pipe joint are connected with the main transformer on-load switch oil chamber through the valve, so that the cleanness of a pipeline or equipment is facilitated, and the risk of damage to the switch is reduced.
Further, a loaded oil inlet pipe joint in the oil filtering pipeline module 1 is connected with a first port of a first three-way valve, and a loaded oil outlet pipe joint is connected with a first port of a second three-way valve; the connection modes are all valves.
The second port of the first three-way valve is connected with the second port of the second three-way valve; the third port of the first three-way valve is connected with the output end of the oil discharge monitoring module 4; for inputting the filtered transformer oil into the oil filtering pipeline module 1.
The third port of the second three-way valve is connected with the input end of the free carbon filtering module 2; the free carbon filtering module is used for inputting the transformer oil into the free carbon filtering module 2 for free carbon filtering treatment.
The free carbon filtering module 2 comprises two parallel filter cores, a control valve group and pressure monitoring equipment, wherein the control valve group is connected with the filter cores, and the pressure monitoring equipment is used for monitoring the pressure of the filter cores. The filter element is used for filtering free carbon in the transformer oil, and the control valve set can be freely switched according to requirements to adjust the conduction state; the filter core that pressure monitoring equipment monitored pressure size can reflect the filter core degree of blockking up, reminds operating personnel in time to change the filter core, prevents that free carbon in the oil from blockking up the filter core, improves oil flow circulation efficiency.
Further, the pressure monitoring equipment in the free carbon filtering module 2 comprises tank inlet pressure monitoring equipment and tank outlet pressure monitoring equipment;
the tank inlet pressure monitoring equipment is connected with the input end of the filter element through a first control valve in the control valve group;
the tank outlet pressure monitoring equipment is connected with the output end of the filter element through a second control valve in the control valve group.
The pressure of the filter element before oil filtering and after oil filtering can be respectively measured by the tank inlet pressure monitoring equipment and the tank outlet pressure monitoring equipment, so that whether the filter element is blocked or not is judged.
It can be understood that the quantity of first control valve is 2, and the quantity of second control valve also is two, distributes on the both sides of two filter cores, can realize freely switching over, and when needs renew cartridge, the selective opening and shutting of control valve can realize the filter core change operation of not cutting off the power supply, has solved and has carried the free carbon of load switch to block up the filter core, and the shut down change can interrupt the problem of oil strain.
The dehydration and degassing module 3 comprises a vacuum tank, an oil-gas separator and a vacuum pump, wherein the vacuum tank comprises a heater, and the oil-gas separator is connected between the vacuum pump and the vacuum tank.
The design of the vacuum tank in the embodiment is larger than that of a common flow oil filter by 60L of liquid oil volume, a proper amount of qualified transformer oil can be pre-installed, oil is injected into an oil duct and exhausted through oil pipe circulation, and the oil level of an oil conservator is adjusted at the end stage of oil filtering.
In the embodiment, a pipeline circulation connecting pipe design is adopted, oil circulation is carried out in the pipeline before use, so that the pipeline is cleaned and exhausted, and misoperation of loaded light gas caused by air entering the loaded switch is avoided; therefore, when the oil inlet pipe and the oil outlet pipe of the on-load switch are connected, the phenomenon that the oil level of the oil conservator is insufficient due to the fact that a large amount of oil of the oil conservator of the on-load switch flows out is avoided. And after oil filtering is finished, transformer oil in the oil pipe can be recovered, so that waste of residual oil in the pipe and environmental pollution are avoided.
Further, the tank outlet pressure monitoring device is also connected with the vacuum tank in the dehydration and degassing module 3 through a third control valve. The transformer oil filtered by the free carbon enters the dehydration and degassing module 3 through the third control valve to continue the oil filtering treatment. Here, the number of the third control valves is one.
The oil discharge monitoring module 4 comprises an oil discharge pump and a flow rate meter, and the oil discharge monitoring module 4 is respectively connected with the three-way valve and the dehydration degassing module 3.
Further, the flow meter is connected in series between the oil discharge pump and the three-way valve.
The oil pump is driven by a variable frequency asynchronous motor to realize the flow control of the transformer oil. The flow meter measures and displays the oil flow speed, feeds the oil flow speed back to the control loop of the variable frequency motor of the oil discharge pump and controls the speed of the oil entering the on-load switch transformer. The oil flow speed of the oil filter is effectively controlled, the risk that the pressure of an outlet pipeline of the oil filter with the load switch is too high, the seal of the load switch is damaged, even the load switch is damaged can be avoided, and the misoperation of heavy gas of the load switch is avoided.
According to the above devices and connection modes, the actual operation process of the system is as follows: opening a first three-way valve, a second three-way valve, a third control valve and valves at a flow velocity meter, starting a vacuum pump, an oil discharge pump and a heater, filtering transformer oil, cleaning and exhausting a pipeline, preventing the transformer oil and the device from being affected with damp and mixed with impurities in the storage and transportation processes, ensuring the high performance of the transformer oil and the cleanness of the device, and ensuring that no air exists when the pipeline is filled with the transformer oil; after the operations are finished, the heater, the oil discharge pump and the vacuum pump of the oil filter are stopped, the valve on one filter element oil passage is closed, oil filtering is continuously carried out only by reserving the other filter element passage, after the valve of the oil inlet and outlet pipe of the load switch is opened, the vacuum pump of the oil filter is started, the oil discharge pump is started, the starting mode of the oil discharge pump is from slow to fast, the oil filtering speed is slowly increased to a certain value, for example, 0.3m/s, and the oil level of the oil pillow of the load switch is adjusted after the oil filtering is finished.
If the oil level of the on-load switch oil conservator is low, slowly closing the third control valve, synchronously slowing down the speed of the oil discharge pump (such as to be below 0.1 m/s), and closing a valve corresponding to the oil discharge pump and the flow meter after the oil level of the oil conservator is properly adjusted; if the oil level of the on-load switch oil conservator is higher, gradually slowing down the oil discharge pump to zero, closing a valve corresponding to the flow velocity meter, and slowly closing a valve of the on-load switch oil outlet pipe after the oil level of the oil conservator is proper; closing the oil inlet valve and the oil outlet valve of the loaded switch; heavy gas of the load switch is input again; opening a third control valve, closing a valve corresponding to the flow meter, starting the vacuum pump, detaching an oil pipe interface of the valve corresponding to the flow meter, returning redundant oil in the oil pipe to the vacuum tank, closing the third control valve, and stopping the vacuum pump; and (4) removing the vacuum oil filtering device with the load switch, cleaning and restoring the site.
According to the oil filtering system based on the transformer on-load switch, the filter element can be replaced without power failure through the two filter elements connected in parallel in the free carbon filtering module, the phenomenon that oil filtering is interrupted when the machine is stopped is avoided, and the pressure monitoring equipment can monitor the oil pressure flowing through the filter elements, so that whether the filter elements are blocked or not is judged; the oil discharge monitoring module can monitor the oil flow speed according to the flow rate meter, the oil discharge pump can control the oil flow speed, and the problem that the on-load switch oil filter pipeline pressure is too large to destroy the on-load switch tightness is avoided. Therefore, the technical problems that the sealing performance of the load switch is damaged and the oil filter is blocked in the conventional oil filtering technology, so that the actual oil filtering process is influenced and the service life of the oil filter is lost can be solved.
To facilitate understanding, referring to fig. 2, the present application provides an embodiment of an oil filtration system method based on a transformer on-load switch, including:
202, removing gas from the primary filtered oil, and evaporating water in the primary filtered oil to obtain target filtered oil;
and 203, monitoring the oil flow speed value of the target filtered oil transmitted to the load switch pipeline in real time, and regulating and controlling the actual oil flow speed according to the oil flow speed value and the oil flow threshold value.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for executing all or part of the steps of the method described in the embodiments of the present application through a computer device (which may be a personal computer, a server, or a network device). And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (6)
1. The utility model provides an oil strain system based on transformer on-load switch which characterized in that includes: the device comprises an oil filtering pipeline module, a free carbon filtering module, a dehydration and degassing module and an oil discharge monitoring module;
the oil filtering pipeline module comprises a three-way valve, an on-load oil inlet pipe joint and an on-load oil outlet pipe joint, and the three-way valve comprises a first three-way valve and a second three-way valve;
the free carbon filtering module comprises two filter elements connected in parallel, a control valve group and pressure monitoring equipment, wherein the control valve group is connected with the filter elements, and the pressure monitoring equipment is used for monitoring the pressure of the filter elements;
the dehydration and degassing module comprises a vacuum tank, an oil-gas separator and a vacuum pump, wherein the vacuum tank comprises a heater, and the oil-gas separator is connected between the vacuum pump and the vacuum tank;
the oil discharge monitoring module comprises an oil discharge pump and a flow rate meter, and the oil discharge monitoring module is respectively connected with the three-way valve and the dehydration and degassing module.
2. The transformer on-load switch-based oil filtration system according to claim 1, wherein the on-load oil inlet pipe joint in the oil filtration pipeline module is connected with the first port of the first three-way valve, and the on-load oil outlet pipe joint is connected with the first port of the second three-way valve;
the second port of the first three-way valve is connected with the second port of the second three-way valve;
the third port of the first three-way valve is connected with the output end of the oil discharge monitoring module;
and a third port of the second three-way valve is connected with the input end of the free carbon filtering module.
3. The transformer on-load switch based oil filtration system of claim 1, wherein the pressure monitoring devices in the free carbon filtration module comprise an inlet tank pressure monitoring device and an outlet tank pressure monitoring device;
the tank inlet pressure monitoring equipment is connected with the input end of the filter element through a first control valve in the control valve group;
and the tank outlet pressure monitoring equipment is connected with the output end of the filter element through a second control valve in the control valve group.
4. The transformer on-load switch-based oil filtration system of claim 1, wherein the tank outlet pressure monitoring device is further connected to the vacuum tank in the dehydration degassing module through a third control valve.
5. The transformer on-load switch-based oil filtration system of claim 1, wherein the flow rate meter is connected in series between the oil drain pump and the three-way valve.
6. An oil filtering method based on a transformer on-load switch is applied to any one of the oil filtering systems according to claims 1-5, and is characterized by comprising the following steps:
carrying out free carbon filtration operation on transformer oil to be treated through a preset filter element, and simultaneously monitoring the oil pressure entering and exiting the preset filter element to obtain primary filtered oil;
removing gas from the primary filtered oil, and evaporating water in the primary filtered oil to obtain target filtered oil;
and monitoring the oil flow speed value of the target filtered oil transmitted to the on-load switch pipeline in real time, and regulating and controlling the actual oil flow speed according to the oil flow speed value and the oil flow threshold value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110604142.9A CN113274803A (en) | 2021-05-31 | 2021-05-31 | Oil filtering system and method based on transformer on-load switch |
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| CN202110604142.9A CN113274803A (en) | 2021-05-31 | 2021-05-31 | Oil filtering system and method based on transformer on-load switch |
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| CN113274803A true CN113274803A (en) | 2021-08-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113909205A (en) * | 2021-11-15 | 2022-01-11 | 广西电网有限责任公司贵港供电局 | Ultrasonic wave filtering and washing device for on-load tap-changer |
| CN114188126A (en) * | 2021-11-02 | 2022-03-15 | 广西电网有限责任公司桂林供电局 | Oil filtering system and method based on transformer on-load switch |
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| DD266671A1 (en) * | 1987-12-22 | 1989-04-05 | Deutsche Reichsbahn | ARRANGEMENT FOR THE PREPARATION OF TRANSFORMERS OIL |
| CN102237177A (en) * | 2010-05-06 | 2011-11-09 | 北京市电力公司 | Device and method for filtering oil in electrified manner for on-load tap-changer of transformer |
| KR101520480B1 (en) * | 2014-04-04 | 2015-06-16 | 김상현 | A transformer vacuum oil filter |
| CN204760187U (en) * | 2015-07-20 | 2015-11-11 | 国网天津市电力公司 | Online oil filter device of transformer on -load tap -changer |
| CN209461252U (en) * | 2019-01-09 | 2019-10-01 | 国网湖北省电力有限公司孝感供电公司 | A kind of compact, the live oil-filtering apparatus of modular transformer oil |
| CN210199108U (en) * | 2019-07-11 | 2020-03-27 | 陕西省地方电力(集团)有限公司延安供电分公司 | Oil sample detection and oil supplement system for on-load tap-changer |
| CN210778163U (en) * | 2019-09-20 | 2020-06-16 | 贵州电网有限责任公司 | Live oil changing system for on-load voltage regulation switch of transformer |
| CN111430114A (en) * | 2020-05-06 | 2020-07-17 | 广东电网有限责任公司 | Electrified oil filtering device and method for main transformer on-load switch |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188126A (en) * | 2021-11-02 | 2022-03-15 | 广西电网有限责任公司桂林供电局 | Oil filtering system and method based on transformer on-load switch |
| CN113909205A (en) * | 2021-11-15 | 2022-01-11 | 广西电网有限责任公司贵港供电局 | Ultrasonic wave filtering and washing device for on-load tap-changer |
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