CN110060858A - Oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method - Google Patents
Oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method Download PDFInfo
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- CN110060858A CN110060858A CN201910287754.2A CN201910287754A CN110060858A CN 110060858 A CN110060858 A CN 110060858A CN 201910287754 A CN201910287754 A CN 201910287754A CN 110060858 A CN110060858 A CN 110060858A
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- oil
- current transformer
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- oil pressure
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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
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The present invention relates to oil-immersed current transformer real time monitoring field more particularly to a kind of oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method.The present invention includes current transformer, further includes that equipment end, wireless collection unit and upper computer end three parts are connected to form, equipment end is mounted at the fuel outlet valve of current transformer；Wireless collection unit is mounted on the spot on current transformer framework, acquires the temperature and pressure signal at simultaneously processing equipment end；Upper computer end is located at interior master control room of standing, and temperature and pressure signal are uploaded to upper computer end using zigbee network by equipment end.The characteristics of present invention has structure simple, reasonable design, easy operation can be realized the real-time acquisition to oil pressure and temperature, realize the accurate acquisition to current transformer and pressure, can determine whether its operating status by correction algorithm and host computer analysis.Apparatus of the present invention have the characteristics that efficiently and accurately is widely applicable, are very suitable for wideling popularize application in power industry.
Description
Technical field
The present invention relates to oil-immersed current transformer real time monitoring fields, more particularly to one kind to be adopted based on accurate oil pressure
The oil-immersed current transformer internal abnormality judgment means of collection method.
Background technique
In recent years, oil-immersed current transformer Frequent Troubles, since its internal structure is compact, fault progression it is serious rapidly and
It is not easy to find, seriously threatens power grid security.Judge that oil-immersed current transformer state mainly passes through at present and makes an inspection tour oil level variation, example
Row test and oil chromatography detection.However since internal oil mass is few, the chromatography period is usually 3-6；The routine test period is usually 3
Year and will in conjunction with have a power failure plan；Traditional tour is and higher to quality requirement is maked an inspection tour so that operation maintenance personnel makes an inspection tour heavy workload.And
Currently, lacking the real-time monitoring mode to oil-immersed current transformer failure.
Summary of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of oil immersed type based on accurate oil pressure acquisition method
Current transformer internal abnormality judgment means, it is interior when Research foundation of the invention is to occur abnormal inside current transformer
Portion's oil pressure has significant change, can be in fast accurate real-time measurement oil-immersed current transformer it is an object of the invention to build
The oil pressure value and changing value in portion, and realize that three-phase mutual inductor oil pressure value compares, according to oil pressure normal inside mutual inductor and failure
Pressure value judges whether there is exception or failure inside it.
For achieving the above object, the present invention adopts the following technical scheme that realize:
Oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method, including current transformer, are also wrapped
It includes equipment end, wireless collection unit and upper computer end three parts to be connected to form, equipment end is mounted on draining the oil for current transformer
At valve；The equipment end includes wireless precisely oil pressure collector；Wireless collection unit is mounted on the spot on current transformer framework,
Acquire the temperature and pressure signal at simultaneously processing equipment end；Upper computer end is located at interior master control room of standing, and equipment end uses zigbee network
Temperature and pressure signal are uploaded to upper computer end.
Three-way device is installed, one end connection of wherein threeway is wireless precisely oily at the equipment end current transformer fuel outlet valve
Collector is pressed, current transformer three-phase respectively installs one, and collected temperature and pressure signal are acquired by wireless precisely oil pressure
Wireless transmission unit built in device sends data to the data acquisition unit of wireless collection unit, data conversion and processing unit
The analog quantity of acquisition is converted into digital quantity and is transmitted to data in situ display unit, on the spot prewarning unit, measurement terminal ZigBee
Transmission unit to host computer platform end backstage computer and analysis system.
The wireless precisely oil pressure collector is to be connected to current transformer by three-way device by pressure, temperature sampler
At fuel outlet valve；It is connected by sealing device with data primary treatment and power supply unit；Wireless transceiver unit and data primary treatment
It is threadedly coupled with power supply unit.
It is connected between the wireless accurate oil pressure collector and hydraulic fluid port flange by three barrels of oil valves.
The wireless precisely oil pressure collector is measuring device, completes the measurement to fuel injection pressure signal, is simutaneously arranged high-precision
Temperature sampler, complete measurement to oil temperature；The wireless precisely oil pressure collector is the quick of a kind of pair of pressure value acquisition
Sensing unit, measurement accuracy is in 0~0.3MPa.
In the wireless precisely oil pressure collector, pressure, temperature sampler realize to current transformer internal oil pressure value and
The acquisition of oil temperature；Sealing device realizes being isolated to immersion oil region and oil-free region；Data primary treatment and power supply unit are real
The primary treatment of existing institute's monitoring data, power supply unit are realized to data processing, display and the power supply of Wireless transceiver unit；It is wireless to pass
Unit is sent to can be realized the transmission to acquired data.
The wireless precisely oil pressure collector includes pressure acquisition devices, and is integrated with temperature sampler, by pressure, temperature number
It after carrying out analysis and arrangement by micro energy lose processor, is sent through wireless communication module, power supply unit is using high-effect coin electricity
Pond；Pressure acquisition devices, temperature sampler, micro energy lose processor, wireless communication module and power supply unit integrate on circuit boards.
The micro energy lose processor can also be replaced with microwatt level processor.
The wireless collection unit is mounted on the spot on current transformer framework, within equipment end 20m；It is described
Wireless collection unit completes the taken at regular intervals and data conversion to voltage signal；Wireless collection unit is realized using installing on the spot
It can show to the real-time acquisition of current transformer three-phase fuel injection pressure signal and data conversion and on the spot, it will by zigbee wireless network
Pressure value is uploaded to master control room host computer.
The upper computer end includes backstage computer and analysis system, is realized to three-phase fuel injection pressure signal, with phase history oil pressure value
Real Time Monitoring and alarm；Host computer realizes that the signal sent to the acquisition of wireless collection unit receives, and carries out three-phase
Oil pressure value comparative analysis and the drafting of oil pressure curve issue alarm when three-phase oil pressure is poor or single phase presses through big or too small；
The test value of pressure, temperature is passed through calibration curve at pressure temperature curve, in conjunction with electric current by the wireless precisely oil pressure collector
The oil mass and expander nargin detail parameters of mutual inductor, correct out pressure correction value, judge whether oil pressure is normal.
Compared with prior art, the present invention having the following advantages that and advantageous effects:
The characteristics of present invention has structure simple, reasonable design, easy operation, fully considers environment temperature, Oil of Current Transformer
The influences of the factors to oil pressure changing value such as amount, current transformer expander design margin, by using high-precision, accuracy of measurement
Reachable ± 0.25% oil pressure collector and temperature sampler, is realized to oil pressure and temperature by reachable ± 0.5 DEG C of accuracy of measurement
It obtains in real time, local mounted wireless collection unit is transmitted a signal to by way of wireless sensing, wireless collection unit is logical
It crosses ZigBee-network and transmits a signal to host computer, host computer is mutual according to the oil temperature and pressure relationship plot of different model, electric current
Different offset is arranged in sensor oil mass, expander design margin etc., is modified to relative pressure, host computer analysis system according to
Whether relative pressure and relative pressure curve carry out three and compare, with phase historical comparison, judge its internal pressure in qualified model
It encloses, so that current transformer internal abnormality situation is judged, it is such as unqualified, issue alarm signal.It is adopted based on accurate oil pressure
The oil-immersed current transformer internal abnormality judgment means of collection method can realize the accurate acquisition to current transformer and pressure, pass through
Correction algorithm and host computer analysis can determine whether its operating status, and device has the characteristics that efficiently and accurately is widely applicable, is very suitable for
Application is widelyd popularize in power industry.
Detailed description of the invention
Understand for the ease of those of ordinary skill in the art and implement the present invention, with reference to the accompanying drawing and specific embodiment
The present invention is described in further detail, it is to be understood that protection scope of the present invention is not by the limit of specific embodiment
System.
Fig. 1 is present system structure chart；
Fig. 2 is wireless precisely oil pressure collector outline structural diagram in the present invention；
Fig. 3 is principle exemplary diagram inside wireless precisely oil pressure collector；
Fig. 4 is oil pressure amendment data explanatory diagram of the present invention.
In figure: wireless precisely oil pressure collector 1, wireless collection unit 2, data conversion and processing unit 3, number are shown on the spot
Show unit 4, on the spot prewarning unit 5, measurement terminal ZigBee transmission unit 6, backstage computer and analysis system 7；Pressure, temperature
Collector 8, sealing device 9 are data processing and power supply unit 10, Wireless transceiver unit 11, pressure acquisition devices 12, temperature acquisition
Device 13, micro energy lose processor 14, wireless communication module 15, power supply unit 16, on circuit board 17.
Specific embodiment
The present invention is a kind of oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method, is such as schemed
Shown in 1, including equipment end, wireless collection unit and upper computer end three parts are connected to form.
Equipment end is fixed at the fuel outlet valve of current transformer；Wireless collection unit 2 is mounted on Current Mutual Inductance on the spot
On device framework, within equipment end 20m, the temperature and pressure signal at simultaneously processing equipment end are acquired；Upper computer end is located at
Temperature and pressure signal are uploaded to upper computer end using zigbee network by master control room in standing, equipment end.
The equipment end includes wireless precisely oil pressure collector, and the wireless precisely oil pressure collector is measuring device, complete
The measurement of pairs of fuel injection pressure signal, is simutaneously arranged high-precision temperature sampler, completes the measurement to oil temperature；It is described wireless accurate
Oil pressure collector is the sensing element of a kind of pair of pressure value acquisition, and measurement accuracy is in 0~0.3MPa.Wireless precisely oil pressure acquisition
The construction workings such as device and the installation of hydraulic fluid port flange need to be carried out in the case where current transformer has a power failure.Product oil valve is opened, wait insulate
After oil stream goes out, three barrels of oil valves are connected immediately, are fixed.After three-way joint oil valve is installed, three-way joint oil valve one end is opened, to insulating oil
After outflow, wireless precisely oil pressure collector is connected immediately.
Wherein, three-way device, the wireless essence of one end connection of wherein threeway are installed at equipment end current transformer fuel outlet valve
Quasi- oil pressure collector 1, current transformer three-phase respectively install one, and collected temperature and pressure signal pass through wireless accurate oil pressure
Wireless transmission unit built in collector 1 sends data to the data acquisition unit 2 of wireless collection unit, data conversion and place
The analog quantity of acquisition is converted to digital quantity and is transmitted to data in situ display unit 4, on the spot prewarning unit 5, measurement end by reason unit 3
Sub- ZigBee transmission unit 6 to host computer platform end backstage computer and analysis system 7.
The wireless collection unit completes the taken at regular intervals and data conversion to voltage signal；Wireless collection unit is using just
Ground installation is realized to the real-time acquisition of current transformer three-phase fuel injection pressure signal and data conversion and can be shown on the spot, passes through
Pressure value is uploaded to master control room host computer by zigbee wireless network.
The upper computer end includes backstage computer and analysis system 7, be can be realized to three-phase fuel injection pressure signal, with phase history oil
The Real Time Monitoring of pressure value and alarm.Host computer realizes that the signal sent to the acquisition of wireless collection unit receives, and carries out
The comparative analysis of three-phase oil pressure value and the drafting of oil pressure curve issue report when three-phase oil pressure is poor or single phase presses through big or too small
It is alert.
As shown in Fig. 2, Fig. 2 is wireless precisely oil pressure collector outline structural diagram.Wherein pressure, temperature sampler 8
Realize the acquisition to current transformer internal oil pressure value and oil temperature；Sealing device 9 is realized to immersion oil region and oil-free region
Isolation, predominantly sealing rubber ring and bolt；Data primary treatment and power supply unit 10 may be implemented at the primary of institute's monitoring data
Reason, power supply unit are realized to data processing, display and the power supply of Wireless transceiver unit；Wireless transceiver unit 11 can be realized to institute
Acquire the transmission of data.
Pressure, temperature sampler 8 are fixed at current transformer fuel outlet valve by three-way device；By sealing device 9 with
Data primary treatment is connected with power supply unit 10, guarantees that pressure, temperature sampler 8 and data primary treatment and power supply unit 10 connect
It connects reliable non-leakage；Wireless transceiver unit 11 is used with data primary treatment and power supply unit 10 and is threadedly coupled.
As shown in figure 3, Fig. 3 is principle exemplary diagram inside wireless precisely oil pressure collector.Wirelessly precisely oil pressure collector is
Based on the pressure acquisition devices 12 that silicon pressure drag micromachined systems technology and silicon strain-ga(u)ge technique produce, and it is integrated with high steady
Qualitative temperature collector 13, by pressure, temperature data by micro energy lose processor 14 carry out analysis and arrangement after and wireless telecommunications mould
Block 15 is sent, and power supply unit 16 uses the high-effect coin-type battery of import Israel, it is ensured that 7 years or more reliable power supplies.Pressure is adopted
Storage 12, temperature sampler 13, micro energy lose processor 14, wireless communication module 15 and power supply unit 16 are integrated in circuit board 17
On.
The micro energy lose processor 14 or microwatt level processor
As shown in figure 4, Fig. 4 is oil pressure amendment data explanatory diagram, by the test value of pressure, temperature by calibration curve at pressure
Temperature curve corrects out pressure correction value in conjunction with detail parameters such as the oil mass of specific current transformer and expander nargin, judgement
Whether oil pressure is normal, using this pressure value as judgment criteria.
Above-mentioned specific embodiment is the preferred embodiment of the present invention, can not be limited the invention, can be according to this
The technical solution and actual conditions of invention are any for away from technical solution of the present invention to determine specific embodiment, others
And the change or other equivalent substitute modes made, it is included within the scope of the present invention.
Claims (10)
1. the oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method, including current transformer,
It is characterized in: further includes that equipment end, wireless collection unit and upper computer end three parts are connected to form, it is mutual that equipment end is mounted on electric current
At the fuel outlet valve of sensor；The equipment end includes wireless precisely oil pressure collector；It is mutual that wireless collection unit is mounted on electric current on the spot
On sensor framework, the temperature and pressure signal at simultaneously processing equipment end are acquired；Upper computer end is located at interior master control room of standing, and equipment end uses
Temperature and pressure signal are uploaded to upper computer end by zigbee network.
2. the oil-immersed current transformer internal abnormality according to claim 1 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: installing three-way device at equipment end current transformer fuel outlet valve, one end connection of wherein threeway is wireless precisely oily
Collector is pressed, current transformer three-phase respectively installs one, and collected temperature and pressure signal are acquired by wireless precisely oil pressure
Wireless transmission unit built in device sends data to the data acquisition unit of wireless collection unit, data conversion and processing unit
The analog quantity of acquisition is converted into digital quantity and is transmitted to data in situ display unit, on the spot prewarning unit, measurement terminal ZigBee
Transmission unit to host computer platform end backstage computer and analysis system.
3. the oil-immersed current transformer internal abnormality according to claim 1 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: the wireless precisely oil pressure collector is that be connected to electric current by three-way device by pressure, temperature sampler mutual
At sensor fuel outlet valve；It is connected by sealing device with data primary treatment and power supply unit；Wireless transceiver unit and data are primary
Processing and power supply unit are threadedly coupled.
4. the oil-immersed current transformer internal abnormality according to claim 1 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: being connected between the wireless accurate oil pressure collector and hydraulic fluid port flange by three barrels of oil valves.
5. the oil-immersed current transformer internal abnormality according to claim 1 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: the wireless precisely oil pressure collector is measuring device, completes the measurement to fuel injection pressure signal, be simutaneously arranged height
The temperature sampler of precision completes the measurement to oil temperature；The wireless precisely oil pressure collector is a kind of pair of pressure value acquisition
Sensing element, measurement accuracy is in 0~0.3MPa.
6. the oil-immersed current transformer internal abnormality according to claim 1 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: pressure, temperature sampler are realized to current transformer internal oil pressure in the wireless precisely oil pressure collector
The acquisition of value and oil temperature；Sealing device realizes being isolated to immersion oil region and oil-free region；Data primary treatment and power supply are single
Member realizes the primary treatment of institute's monitoring data, and power supply unit is realized to data processing, display and the power supply of Wireless transceiver unit；Nothing
Line transmission unit can be realized the transmission to acquired data.
7. the oil-immersed current transformer internal abnormality according to claim 1 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: the wireless precisely oil pressure collector includes pressure acquisition devices, and temperature sampler is integrated with, by pressure, temperature
It after degree is according to analysis and arrangement is carried out by micro energy lose processor, is sent through wireless communication module, power supply unit uses high-effect coin
Formula battery；Pressure acquisition devices, temperature sampler, micro energy lose processor, wireless communication module and power supply unit are integrated in circuit
On plate.
8. the oil-immersed current transformer internal abnormality according to claim 7 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: the micro energy lose processor can also be replaced with microwatt level processor.
9. the oil-immersed current transformer internal abnormality according to claim 1 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: the wireless collection unit completes the taken at regular intervals and data conversion to voltage signal；Wireless collection unit is adopted
With installing on the spot, realizes to the real-time acquisition of current transformer three-phase fuel injection pressure signal and data conversion and can show on the spot, pass through
Pressure value is uploaded to master control room host computer by zigbee wireless network.
10. the oil-immersed current transformer internal abnormality according to claim 1 based on accurate oil pressure acquisition method judges dress
It sets, it is characterized in that: the upper computer end includes backstage computer and analysis system, realizes to three-phase fuel injection pressure signal, with phase history oil
The Real Time Monitoring of pressure value and alarm；Host computer realizes that the signal sent to the acquisition of wireless collection unit receives, and carries out
The comparative analysis of three-phase oil pressure value and the drafting of oil pressure curve issue report when three-phase oil pressure is poor or single phase presses through big or too small
It is alert；The test value of pressure, temperature is passed through calibration curve at pressure temperature curve, in conjunction with electricity by the wireless precisely oil pressure collector
The oil mass and expander nargin detail parameters of current transformer, correct out pressure correction value, judge whether oil pressure is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910287754.2A CN110060858A (en) | 2019-04-11 | 2019-04-11 | Oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method |
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| CN201910287754.2A CN110060858A (en) | 2019-04-11 | 2019-04-11 | Oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631762A (en) * | 2019-11-01 | 2019-12-31 | 国网江苏省电力有限公司电力科学研究院 | Method for determining internal pressure criterion for mutual inductor fault early warning |
| CN110906973A (en) * | 2019-10-28 | 2020-03-24 | 国家电网有限公司 | System and method for monitoring oil-immersed power element |
| CN111856381A (en) * | 2020-07-27 | 2020-10-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Disassembling and defect checking method of oil-immersed upright current transformer |
| WO2021063473A1 (en) * | 2019-09-30 | 2021-04-08 | Siemens Energy Global GmbH & Co. KG | Instrument transformer with bellow and method for pressure compensation during fluid volume changes |
| CN112683335A (en) * | 2021-01-11 | 2021-04-20 | 杭州科宏仪器仪表有限公司 | Method and device for detecting faults of transformer equipment casing |
| CN115060843A (en) * | 2022-07-11 | 2022-09-16 | 广东电网有限责任公司 | MEMS chromatographic column and thermal conductivity detector integrated device |
| CN117629313A (en) * | 2024-01-26 | 2024-03-01 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964725A (en) * | 2015-06-11 | 2015-10-07 | 国家电网公司 | Inverted-type current transformer oil level monitoring method |
| CN107576443A (en) * | 2017-10-12 | 2018-01-12 | 西安亚能电气有限责任公司 | Pressure on-line monitoring system for 750kV high-tension insulating bushings |
| CN108051032A (en) * | 2017-12-20 | 2018-05-18 | 国网新疆电力有限公司吐鲁番供电公司 | The on-line monitoring system of the few oily equipment of substation |
| CN108318849A (en) * | 2018-03-19 | 2018-07-24 | 国网新疆电力有限公司 | A kind of wireless sensor device and wireless detecting system |
| CN108492971A (en) * | 2018-03-17 | 2018-09-04 | 国网新疆电力有限公司 | For the monitoring assembly of oil-immersed current transformer, installation method and monitoring system |
| CN109490811A (en) * | 2018-11-23 | 2019-03-19 | 国网四川省电力公司 | A kind of oil pressure monitoring method of inverted type current transformer |
| CN210073591U (en) * | 2019-04-11 | 2020-02-14 | 国网辽宁省电力有限公司电力科学研究院 | Oil-immersed current transformer internal abnormity judgment device based on accurate oil pressure acquisition method |
-
2019
- 2019-04-11 CN CN201910287754.2A patent/CN110060858A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964725A (en) * | 2015-06-11 | 2015-10-07 | 国家电网公司 | Inverted-type current transformer oil level monitoring method |
| CN107576443A (en) * | 2017-10-12 | 2018-01-12 | 西安亚能电气有限责任公司 | Pressure on-line monitoring system for 750kV high-tension insulating bushings |
| CN108051032A (en) * | 2017-12-20 | 2018-05-18 | 国网新疆电力有限公司吐鲁番供电公司 | The on-line monitoring system of the few oily equipment of substation |
| CN108492971A (en) * | 2018-03-17 | 2018-09-04 | 国网新疆电力有限公司 | For the monitoring assembly of oil-immersed current transformer, installation method and monitoring system |
| CN108318849A (en) * | 2018-03-19 | 2018-07-24 | 国网新疆电力有限公司 | A kind of wireless sensor device and wireless detecting system |
| CN109490811A (en) * | 2018-11-23 | 2019-03-19 | 国网四川省电力公司 | A kind of oil pressure monitoring method of inverted type current transformer |
| CN210073591U (en) * | 2019-04-11 | 2020-02-14 | 国网辽宁省电力有限公司电力科学研究院 | Oil-immersed current transformer internal abnormity judgment device based on accurate oil pressure acquisition method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021063473A1 (en) * | 2019-09-30 | 2021-04-08 | Siemens Energy Global GmbH & Co. KG | Instrument transformer with bellow and method for pressure compensation during fluid volume changes |
| CN110906973A (en) * | 2019-10-28 | 2020-03-24 | 国家电网有限公司 | System and method for monitoring oil-immersed power element |
| CN110631762A (en) * | 2019-11-01 | 2019-12-31 | 国网江苏省电力有限公司电力科学研究院 | Method for determining internal pressure criterion for mutual inductor fault early warning |
| CN110631762B (en) * | 2019-11-01 | 2021-06-15 | 国网江苏省电力有限公司电力科学研究院 | Method for determining internal pressure criterion for mutual inductor fault early warning |
| CN111856381A (en) * | 2020-07-27 | 2020-10-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Disassembling and defect checking method of oil-immersed upright current transformer |
| CN111856381B (en) * | 2020-07-27 | 2022-04-22 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Disassembling and defect checking method of oil-immersed upright current transformer |
| CN112683335A (en) * | 2021-01-11 | 2021-04-20 | 杭州科宏仪器仪表有限公司 | Method and device for detecting faults of transformer equipment casing |
| CN115060843A (en) * | 2022-07-11 | 2022-09-16 | 广东电网有限责任公司 | MEMS chromatographic column and thermal conductivity detector integrated device |
| CN115060843B (en) * | 2022-07-11 | 2023-08-04 | 广东电网有限责任公司 | MEMS chromatographic column and thermal conductivity detector integrated device |
| CN117629313A (en) * | 2024-01-26 | 2024-03-01 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
| CN117629313B (en) * | 2024-01-26 | 2024-04-05 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
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