CN202404070U - System for monitoring content of gas in transformer oil in online manner - Google Patents
System for monitoring content of gas in transformer oil in online manner Download PDFInfo
- Publication number
- CN202404070U CN202404070U CN2011205647768U CN201120564776U CN202404070U CN 202404070 U CN202404070 U CN 202404070U CN 2011205647768 U CN2011205647768 U CN 2011205647768U CN 201120564776 U CN201120564776 U CN 201120564776U CN 202404070 U CN202404070 U CN 202404070U
- Authority
- CN
- China
- Prior art keywords
- gas
- oil
- chamber
- optoacoustic
- circuit
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
A system for monitoring the content of gas in transformer oil in an online manner comprises an oil circuit system, a gas circuit control module, a photoacoustic spectrometry monitoring module and a signal conditioning analysis module. The oil circuit system comprises a transformer, an oil tank, a threaded polymeric membrane tube, an oil scavenger pump and a flow meter which are sequentially connected through a pipeline and form a loop. The gas circuit control module comprises a gas collecting chamber and a buffer chamber connected with the gas collecting chamber through a gas circuit. The photoacoustic spectrometry monitoring module comprises an infrared light source, a spherical reflector, a modulating disk, a light filter and a photoacoustic cavity, wherein the modulating disk, the light filter and the photoacoustic cavity are sequentially arranged in a light path, and the photoacoustic cavity is connected with the buffer chamber through a gas circuit. The signal conditioning analysis module comprises a micro-water sensor, an H2 sensor, a microphone, a preamplifier, a lock-in amplifier and a detection controller, wherein the preamplifier is connected with the microphone through a circuit, the lock-in amplifier is connected with the preamplifier through a circuit, and the detection controller is connected with the micro-water sensor, the H2 sensor and the lock-in amplifier through a circuit. The system is used for detecting various types of gas based on photoacoustic spectrometry, and complexity of online detection of an oil circuit in the transformer and instability of the system are greatly reduced.
Description
Technical field
The utility model relates to the on-line monitoring of high-voltage electric equipment field, relates in particular to a kind of system of on-line monitoring Gas in Oil of Transformer content.
Background technology
Since the prophylactic repair system of in electric system, generally carrying out at present needs and the power consumer of incompatibility electric system reform and development to the requirement of power supply reliability; Electric power enterprise has pressed for the more advanced in the world repair based on condition of component of implementation; Promptly determine whether to need repairing and how to keep in repair according to equipment running, and on-line monitoring be to high-voltage electrical equipment carry out state maintenance must with effective means.
Because the insulation system that electrical equipments such as power transformer, sleeve pipe all select for use insulating oil or oilpaper and cardboard to form; When device interior hot fault, discharge property fault or insulating oil take place, when paper is aging; Can produce multiple gases; These gases can be dissolved in the oil, and dissimilar gas and concentration can reflect dissimilar electric faults.At present, power transformer is carried out the monitoring method that method that fault declares mainly contains gas content in shelf depreciation diagnosis and the insulating oil.The determination methods that detection is put in office is subject to the on-the-spot interference of electromagnetic field, and discharge signal is difficult to extract, so still be gas detection method in the oil to the most effective determination methods of diagnosing fault of power transformer.
The monitoring method of Gas in Oil of Transformer content can be divided into off-line type and online two kinds.The gas chromatograph of off-line type has advantages such as selectivity is good, separating property is high, disengaging time is fast, highly sensitive and applied widely; But also there is a series of weak point; There is personal error in degassing operation, and the manual work correction of detection curve also can add mistake; Again to lab analysis, job procedure is complicated from the gas-oil separation that draws oil sample, and spended time is long; In addition, the development faster or slower of insulation degradation, the discovery fault that preventive experiment can not be real-time, gas content in the electric power transformer oil is implemented on-line monitoring has become exigence.Shortcomings such as the sense cycle that online gas chromatography monitoring system has well solved the off-line type gas chromatograph is long, analysis time is long.But present most of online gas chromatography monitoring system; For example " the MGA2000 On-Line Monitor Device of Gas in Oil of Transformer " of Ningbo science and engineering method of mentioning only uses in the oil gas intelligence sensor to measure, and measuring accuracy is on the low side, measurement gas is few, long-term work is unstable, the later maintenance amount is big.
The utility model content
The system of a kind of on-line monitoring Gas in Oil of Transformer content that the utility model provides; Based on photocaustic spectroscopy; Can replace the off-line type chromatograph; Can long-term stability run on the scene again, the detected gas kind is many, reduces the complexity of oil circuit in the online detection transformer and the instability of system simultaneously greatly.
In order to achieve the above object, the utility model provides a kind of system of on-line monitoring Gas in Oil of Transformer content, and this system comprises oil piping system, gas circuit control module, optoacoustic spectroscopy monitoring modular and signal condition analysis module;
Described oil piping system comprises pipeline connection successively and forms transformer, oil tank, shape of threads polymeric membrane pipe, dump pump and the flowmeter in loop;
Described gas circuit control module comprises the collection chamber that is arranged on shape of threads polymeric membrane pipe outside, and the surge chamber that is connected with the collection chamber gas circuit;
Described optoacoustic spectroscopy monitoring modular comprises infrared light supply, is arranged on the spherical reflector of infrared light supply rear side, and is successively set on chopper wheel, optical filter and optoacoustic chamber in the light path, and this optoacoustic chamber gas circuit connects described surge chamber;
Described signal condition analysis module comprises little water sensor of being arranged in the oil tank, is arranged on the H in the surge chamber
2Sensor, be arranged on the microphone on the optoacoustic chamber, circuit connects the lock-in amplifier that said microphonic prime amplifier, circuit connect said prime amplifier, and circuit connects said little water sensor, H
2The detection controller of sensor and lock-in amplifier.
Described optoacoustic chamber has optoacoustic chamber light inlet;
Described optoacoustic spectroscopy monitoring modular also comprises the vacuum pump that circuit connects said optoacoustic chamber.
Described chopper wheel is also distinguished circuit with optical filter and is connected stepper motor, and this stepper motor circuit connects described detection controller.
Described microphone is arranged on the antinodal point in optoacoustic chamber.
The beneficial effect of the utility model is:
1, the utility model adopts the negative pressure degasification of polymeric membrane pipe, and degassing efficiency is high, and the degassing time is short, can be repeatedly used.
The optoacoustic method is to produce hyperacoustic characteristics when utilizing gas to the photonic absorption energy, and utilizes optoacoustic effect can measure the very little gas of absorption photon energy, does not absorb the H of photon energy
2Measure with sensor, little water is also realized accurately measuring through sensor in the oil, and it is highly sensitive, and is stable, dependable performance; Since little when detecting to the required amount of gas, the structure that gas-oil separation and gas circuit are controlled just simplified greatly, and the volume in optoacoustic chamber also has only 5ml, makes easy to manufacture, cheap.In the utility model, spectroscopic methodology is a spectral characteristic of utilizing the gas absorption photon energy, adopts incoherent wide light source, provides the wavelength of wider range can detect multiple gases, makes to manufacture and design flexibly simply; Adopt a kind of gas only to the maximum characteristic of the photonic absorption energy of certain wavelength; The utilization optical filter provides monochromatic light according to detecting a kind of gas, makes and detects accurately; Use stepper motor that multiple optical filter is provided, thereby multiple monochromatic light photograph can be provided, detect multiple gases, widened the scope of detection failure greatly.Owing to used microphone as detecting element, its sensitivity drift at normal temperatures is very little, and the life-span is long, and is easy to maintenance, and maintenance is little; Little and be hedged off from the outer world because of the optoacoustic chamber, and use vacuum pump that the waste gas in optoacoustic chamber is got rid of, guarantee that the optoacoustic chamber is not contaminated and disturb that make accuracy of detection high, the checkout equipment life-span is long, the reliability height.Owing in the system of utilization optoacoustic spectroscopy on-line monitoring Gas in Oil of Transformer content, do not have pre-heating device, adopt Electronic Control and computer technology simultaneously, can not only a large amount of converting equipments be carried out on-line monitoring; Form multistage monitoring net, can also handle judgement to the information that detects automatically, inquiry and report are provided; Note abnormalities and can in time give a warning, and the details of trouble spot can be provided, its system's operational reliability is high; Operating cost is low; Save manpower, fault handling is timely, has improved the operational effect and the quality of power equipment greatly.
2, with the on-line chromatograph ratio, optoacoustic spectroscopy does not consume sample, does not need consume carrier gas, does not need to pollute aging chromatographic column and complicated air-path control system easily, and its sensitivity is higher, and cost is also enough low.
Compare with fourier infrared, its most outstanding characteristics are to utilize H
2Sensor and H
2The O sensor is measured H
2, H
2The volume fraction of O.Compare and measure optical meanss that transit doses change with all, optoacoustic spectroscopy can directly be measured uptake and improve detection sensitivity greatly, and the raising of sensitivity has produced many active influences, at first is embodied in technical to gas-oil separation.Because gas and oil equilibration time and air chamber volume are inversely proportional to, and in fourier infrared is measured, use the volume in ultra micro gas pond also to reach 100ml, thus also higher to the requirement of gas-oil separation technology.And the collection chamber of optoacoustic spectroscopy only needs the volume of 60ml, greatly reduces the difficulty to gas-oil separation.Next is the selection at characteristic spectrum peak, in fourier infrared, because gas pond limited length is only measured at stronger characteristic absorption place, could obtain enough sensitivity.Therefore the overlapping of each component characteristics absorption detects again; In optoacoustic spectroscopy, because the raising of detection sensitivity, can detect in extremely weak absorption place and obtain enough sensitivity, thereby can select not disturbed by other components, even remove CH
4Do not receive moisture and CO outward fully yet
2The characteristic frequency spectrum that disturbs, thereby improved the degree of accuracy and the accuracy of measuring.See that from effect the measurement index of online photo-acoustic spectrometer has also all surpassed online Fourier infrared spectrograph.
Description of drawings
Fig. 1 is the system construction drawing of the utility model.
Embodiment
Following according to Fig. 1, specify the preferred embodiment of the utility model.
As shown in Figure 1, the system of the on-line monitoring Gas in Oil of Transformer content that the utility model provides comprises oil piping system, gas circuit control module, optoacoustic spectroscopy monitoring modular and signal condition analysis module.
Described oil piping system comprises pipeline connection successively and forms transformer 1, oil tank 3, shape of threads polymeric membrane pipe 5, dump pump 6 and the flowmeter 7 in loop.
Described gas circuit control module comprises the collection chamber 4 that is arranged on shape of threads polymeric membrane pipe 5 outsides, and the surge chamber 8 that is connected with collection chamber 4 gas circuits.
Described optoacoustic spectroscopy monitoring modular comprises infrared light supply 11; Be arranged on the spherical reflector 10 of infrared light supply rear side; And be successively set on chopper wheel 12, optical filter 14 and the optoacoustic chamber 15 in the light path, and this optoacoustic chamber gas circuit connects described surge chamber 8, and this optoacoustic chamber has optoacoustic chamber light inlet 21; This optoacoustic spectroscopy monitoring modular also comprises the vacuum pump 19 that circuit connects said optoacoustic chamber 15, and described chopper wheel 12 is also distinguished circuit with optical filter 14 and is connected stepper motor 13.
Described signal condition analysis module comprises the little water (H that is arranged in the oil tank 3
2O) sensor 2, be arranged on the H in the surge chamber 8
2Sensor 9, be arranged on the microphone 16 (microphone 16 is arranged on the antinodal point in optoacoustic chamber 15) on the optoacoustic chamber 15; Prime amplifier 17, the circuit that circuit connects said microphone 16 connects the lock-in amplifier 18 of said prime amplifier 17, and circuit connects said little water sensor 2, H
2The detection controller 20 of sensor 9, stepper motor 13 and lock-in amplifier 18.
The system of above-mentioned on-line monitoring Gas in Oil of Transformer content; Its principle of work is to have adopted the measurement of gas photocaustic spectroscopy to be dissolved in the gas in the transformer oil; Through the detected gas molecule absorption of light source photon energy is come the quantitative test gas concentration, it belongs to measures the analysis method for gases that absorbs.Detection method with respect to direct measuring light emittance has increased the process that becomes heat energy voice signal, also belongs to the method for heat determination.Modulate light source with certain audio frequency.In a special optoacoustic chamber, just can detect the voice signal identical, Here it is material photoacoustic signal to be measured through microphone with frequency.
Because electrical equipments such as transformer, sleeve pipe all select for use oil or oilpaper and cardboard to form insulation system, when device interior generation hot stall, discharge property fault or oil, when paper is aging, can produce all gases.These gas dissolvings are in oil, and dissimilar gas and concentration can reflect dissimilar electric faults.Be dissolved in Gas in Oil of Transformer and mainly contain hydrogen, methane, ethane, ethene, acetylene, carbon monoxide, carbon dioxide etc.Majority of gas all has the following characteristic:
One, optoacoustic characteristic: when with rayed gas, gas can absorb photon energy, expands, and increases volume.Can produce ultrasound wave during expansion, gas concentration is big more, and amplitude of ultrasonic is strong more.
Two, spectral characteristic: each gas molecule is all maximum to the photon energy absorption value of certain wavelength, and promptly a kind of gas photon energy to a kind of wavelength when absorbing peak-peak takes place, and different gas absorption photon energy wavelength the most for a long time is all different.But also there is the wavelength of few portion gas or material absorbing photon energy peak overlapping, produces and intersect.Choose absorption peak and should avoid overlapping absorption peak as far as possible, peak value is big as far as possible.Select to absorb photon energy maximum wavelength such as following table:
| Gas composition | Molecular weight | Characteristic wave number/cm-1 | Characteristic wavelength/ |
| Methane | |||
| 16 | 1254 | 7.974 | |
| Ethane | 30 | 861 | 11.614 |
| Ethene | 28 | 1061 | 9.425 |
| Acetylene | 26 | 783 | 12.771 |
| Carbon monoxide | 28 | 2150 | 4.651 |
| Carbon dioxide | 44 | 668 | 14.970 |
Visible by last table, all there is stronger absorption peak at ethane, ethene, acetylene, carbon monoxide and carbon dioxide listed characteristic wave number place in table, and does not have cross interference between each gas, also can not receive the influence of transformer W/O.Visible by last table, the characteristic wavelength that oil chromatography need detect is between the 4.651 μ m-14.97 μ m, therefore relatively is applicable to gas detector in the adjustable radiation source of this wave band.Can be divided into pulse and be connected two types of radiation by the working method optical emitter, the light beam that becomes when becoming intensity for the light beam that makes continuous radiation also needs various corresponding modulation technology usually.If the characteristic by radiation itself is divided, radiating light source can be divided into incoherent light source and two types of the low-light light sources that is concerned with again.In general the tunable range of infrared light supply is wide less than incoherent light source, can not measure a variety of gases simultaneously, and the wide infrared light of adjustable extent is relatively more expensive, so adopt incoherent light source proper usually.Because therefore the time continuous spectrum of incoherent light source emission must use wavelength to select original paper (like optical filter or monochromator).
The concrete course of work of the utility model is following:
At first from transformer 1, get oil and enter into oil tank 3, little water sensor 2 is directly measured H in oily round-robin process
2The concentration of O also upload the data in the detection controller 20.Oil in the oil tank 3 is uniformly through polymeric membrane pipe 5, and interior 1 atmospheric pressure of oil is managed 0.5 atmospheric pressure in the outer degas chamber; Oil negative pressure in the process of polymeric membrane pipe 5 of at the uniform velocity flowing through is deviate from gas, is coming back in the transformer 1 through flowmeter 7 under the effect of dump pump 6, can effectively control the flow velocity of oil through flowmeter; Degas chamber 4 negative pressure degasifications; Intercept water and get in the gas, isolated gas is directed in the optoacoustic chamber 15 through surge chamber 8, H
2Sensor 9 is directly measured H in surge chamber 8
2Concentration also upload the data in the detection controller 20.Infrared light supply 11 emission infrared lights are reflected into parallel infrared beam through spherical mirror 10, after modulator 12 modulation, project optical filter 14; Stepper motor 13 is according to the instruction that detects controller 20; The optical filter 14 that need are surveyed the gaseous spectrum characteristic wavelength is delivered to the light inlet 21 in optoacoustic chamber 15, and the infrared light after the modulation gets into optoacoustic chambeies 15 radiating gas through this optical filter 14, and gas absorption luminous energy expands; Produce ultrasound wave; The high sensitivity microphone 16 detecting device ultrasonic intensities of optoacoustic chamber 15 outer walls through prime amplifier 17, pass to detected signal to detect on the controller 20 with data after lock-in amplifier 18 amplifies and carry out diagnostic analysis.Start vacuum pump 19 after detection finishes and clean optoacoustic chamber and tracheaes, guarantee the purity of detected gas.Adopt above method to guarantee accuracy of detection and accuracy; Through above-mentioned process once, detect the concentration of a kind of gas and this gas.At each stepper motor 13 optical filter 14 of gas with various spectral signature is delivered under the prerequisite in optoacoustic chamber 15; Just detect multiple gases and concentration in the transformer oil through repeatedly above-mentioned process; Kind and concentration according to gas just can accurately be judged transformer running quality or fault category and the fault order of severity; Detect controller 20 continuous cycle detection is set, operation conditions that just can online long term monitoring transformer.
Said H
2The model of sensor 9 is the 7HYT of Britain CITY, and resolution is 2ppm, and the model of little water sensor 2 is the MMT162B2BDGOAA66A1A of last Helen's bodyguard electronics technology company limited, and resolution is 0.1ppm;
Said microphone 16 is a capacitor type electret microphone; Model is the FG-23629-C36 that KNOWLES ELECTRONICS company of U.S. Knowles Electronics produces; Less than 1%, measuring accuracy is not less than 10mv/mp in 200 years in its sensitivity drift under normal temperature condition, has high sensitivity and noise resisting ability;
Multicomponent gas and low ground unrest, acoustic energy loss can be detected in said optoacoustic chamber 15, thereby improve the detection sensitivity of system.Described optoacoustic chamber 15 is resonant cylindrical, and material uses the bigger brass of thermal conductivity coefficient, and long is 45mm, and radius is 10mm, and volume 5ml has light inlet 21, draft tube, escape pipe.Microphone 16 is placed on the antinodal point in optoacoustic chamber 15, can improve the signal amplitude and inhibition noise of microphone 16 so greatly, and the 0.628R (R represents radius) that the interface of draft tube is chosen in optoacoustic chamber 15 radiuses locates.
Described infrared light supply 11 covers the infrared light supply of the dribbling face catoptron of 1-20 μ m for wavelength; Model is MIRL17-900; Be incoherent wide light source, can effectively cover the spectrum (characteristic wavelength that oil chromatography need detect is 4.65 μ m-14.97 μ m) of Gas in Oil of Transformer;
Described stepper motor 13 adopts miniature pulse motor;
Described detection controller 20 adopts computing machine;
The oil of from transformer 1, getting 90ml flow into earlier in the oil tank 3, avoids the oil of transformer 1 directly to get into polymeric membrane pipe 5 and makes the film forming pipe infringement, plays prolongation film pipe serviceable life;
Oil in the oil tank 3 flows to the main sampling function that realizes transformer 1 oil dissolved gas in the degas chamber 4; It adopts up-to-date shape of threads polymeric membrane pipe negative pressure degasification, and degassing efficiency reaches 95%, and the degassing time is short; As long as 15 minutes; And effectively stop air and little water to get in the optoacoustic chamber 15 to cause cross influence, it is long to have solved the time of the degasser degassing in the past, the repeatable shortcoming that differs from;
Gas is introduced in the surge chamber 8 after from degas chamber 4, coming out, and slows down gas velocity, and the combination gas physical efficiency is imported in the optoacoustic chamber 15 through tracheae uniformly.
In sum, the method and system of utilization optoacoustic spectroscopy on-line monitoring Gas in Oil of Transformer content, method is reasonable, and is simple in structure; Reliable, the monitoring gaseous species is many, and accuracy of detection is high, and speed is fast; Workable, can shorten the obstacle time, maintenance is little, for a long time on-line monitoring; Cheap, use manpower and material resources sparingly, can greatly improve the operational efficiency of transformer.
Although the content of the utility model has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to the restriction to the utility model.After those skilled in the art have read foregoing, for the multiple modification of the utility model with to substitute all will be conspicuous.Therefore, the protection domain of the utility model should be limited appended claim.
Claims (5)
1. the system of an on-line monitoring Gas in Oil of Transformer content is characterized in that, this system comprises oil piping system, gas circuit control module, optoacoustic spectroscopy monitoring modular and signal condition analysis module;
Described oil piping system comprises pipeline connection successively and forms transformer (1), oil tank (3), shape of threads polymeric membrane pipe (5), dump pump (6) and the flowmeter (7) in loop;
Described gas circuit control module comprises the collection chamber (4) that is arranged on shape of threads polymeric membrane pipe (5) outside, and the surge chamber (8) that is connected with collection chamber (4) gas circuit;
Described optoacoustic spectroscopy monitoring modular comprises infrared light supply (11); Be arranged on the spherical reflector (10) of infrared light supply rear side; And being successively set on chopper wheel (12) in the light path, optical filter (14) and optoacoustic chamber (15), this optoacoustic chamber gas circuit connects described surge chamber (8);
Described signal condition analysis module comprises little water sensor (2) of being arranged in the oil tank (3), is arranged on the H in the surge chamber (8)
2Sensor (9), be arranged on the microphone (16) on the optoacoustic chamber (15); Circuit connects the prime amplifier (17) of said microphone (16), the lock-in amplifier (18) that circuit connects said prime amplifier (17), and circuit connects said little water sensor (2), H
2The detection controller (20) of sensor (9) and lock-in amplifier (18).
2. the system of on-line monitoring Gas in Oil of Transformer content as claimed in claim 1 is characterized in that, described optoacoustic chamber has optoacoustic chamber light inlet (21).
3. the system of on-line monitoring Gas in Oil of Transformer content as claimed in claim 1 is characterized in that, described optoacoustic spectroscopy monitoring modular also comprises the vacuum pump (19) that circuit connects said optoacoustic chamber (15).
4. the system of on-line monitoring Gas in Oil of Transformer content as claimed in claim 1; It is characterized in that; Described chopper wheel (12) is also distinguished circuit with optical filter (14) and is connected stepper motor (13), and this stepper motor (13) circuit connects described detection controller (20).
5. the system of on-line monitoring Gas in Oil of Transformer content as claimed in claim 1 is characterized in that, described microphone (16) is arranged on the antinodal point of optoacoustic chamber (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205647768U CN202404070U (en) | 2011-12-30 | 2011-12-30 | System for monitoring content of gas in transformer oil in online manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205647768U CN202404070U (en) | 2011-12-30 | 2011-12-30 | System for monitoring content of gas in transformer oil in online manner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202404070U true CN202404070U (en) | 2012-08-29 |
Family
ID=46701710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205647768U Withdrawn - After Issue CN202404070U (en) | 2011-12-30 | 2011-12-30 | System for monitoring content of gas in transformer oil in online manner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202404070U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539338A (en) * | 2011-12-30 | 2012-07-04 | 昆山和智电气设备有限公司 | Online monitoring system for gas content in transformer oil by using photoacoustic spectrum |
| CN103411920A (en) * | 2013-07-03 | 2013-11-27 | 安徽建筑大学 | Portable multi-component online monitor of gas dissolved in transformer oil |
| CN103424296A (en) * | 2013-08-19 | 2013-12-04 | 中国科学院电工研究所 | Vacuum-pump-free online separating system for gas in insulating oil |
| CN103868990A (en) * | 2014-03-03 | 2014-06-18 | 国网电力科学研究院武汉南瑞有限责任公司 | Device and method for giving early warning on freezing of power transformer oil under extreme cold environment |
| CN104237153A (en) * | 2013-06-07 | 2014-12-24 | 恒能华工监测技术(北京)有限公司 | Online rapid detection system for gas content of transformer oil |
| CN106382964A (en) * | 2015-08-05 | 2017-02-08 | 特变电工股份有限公司 | Oil metering system |
| CN110823809A (en) * | 2019-12-03 | 2020-02-21 | 大连理工大学 | Anti-electromagnetic interference in-situ measurement system and method for dissolved gas in oil |
| CN112858806A (en) * | 2020-12-30 | 2021-05-28 | 北京杜克泰克科技有限公司 | Online pulse taking diagnosis system and method for gas in transformer oil |
| CN113252608A (en) * | 2021-04-25 | 2021-08-13 | 江西师范大学 | Device for measuring gas refractive index based on light path folding and vacuumizing modes |
| CN113758876A (en) * | 2021-09-29 | 2021-12-07 | 中广核研究院有限公司 | Gas detection equipment and system in oil |
-
2011
- 2011-12-30 CN CN2011205647768U patent/CN202404070U/en not_active Withdrawn - After Issue
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539338A (en) * | 2011-12-30 | 2012-07-04 | 昆山和智电气设备有限公司 | Online monitoring system for gas content in transformer oil by using photoacoustic spectrum |
| CN104237153A (en) * | 2013-06-07 | 2014-12-24 | 恒能华工监测技术(北京)有限公司 | Online rapid detection system for gas content of transformer oil |
| CN103411920A (en) * | 2013-07-03 | 2013-11-27 | 安徽建筑大学 | Portable multi-component online monitor of gas dissolved in transformer oil |
| CN103424296A (en) * | 2013-08-19 | 2013-12-04 | 中国科学院电工研究所 | Vacuum-pump-free online separating system for gas in insulating oil |
| CN103868990A (en) * | 2014-03-03 | 2014-06-18 | 国网电力科学研究院武汉南瑞有限责任公司 | Device and method for giving early warning on freezing of power transformer oil under extreme cold environment |
| CN103868990B (en) * | 2014-03-03 | 2016-07-06 | 国网内蒙古东部电力有限公司电力科学研究院 | A kind of under extremely cold environment electric power transformer oil congeal the device and method of early warning |
| CN106382964A (en) * | 2015-08-05 | 2017-02-08 | 特变电工股份有限公司 | Oil metering system |
| CN106382964B (en) * | 2015-08-05 | 2019-08-20 | 特变电工股份有限公司 | A kind of oil-metering system |
| CN110823809A (en) * | 2019-12-03 | 2020-02-21 | 大连理工大学 | Anti-electromagnetic interference in-situ measurement system and method for dissolved gas in oil |
| CN112858806A (en) * | 2020-12-30 | 2021-05-28 | 北京杜克泰克科技有限公司 | Online pulse taking diagnosis system and method for gas in transformer oil |
| CN113252608A (en) * | 2021-04-25 | 2021-08-13 | 江西师范大学 | Device for measuring gas refractive index based on light path folding and vacuumizing modes |
| CN113758876A (en) * | 2021-09-29 | 2021-12-07 | 中广核研究院有限公司 | Gas detection equipment and system in oil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102539338B (en) | Online monitoring system for gas content in transformer oil by using photoacoustic spectrum | |
| CN202404070U (en) | System for monitoring content of gas in transformer oil in online manner | |
| CN101487818B (en) | On-line monitoring method and system for gas content in transformer oil | |
| Jiang et al. | TDLAS-based detection of dissolved methane in power transformer oil and field application | |
| CN108387527B (en) | Photoacoustic spectrum oil gas detection device capable of eliminating cross interference | |
| CN201402257Y (en) | Gas content on-line monitoring system in transformer oil | |
| CN106053428B (en) | A kind of petrochemical industry based on the enhancing of F-P optical signallings carries the sensing device of hydrogen pipeline gas content on-line measurement | |
| CN102661918A (en) | Off-resonance photoacoustic spectrometric detection and analysis device | |
| CN104251819A (en) | Photoacoustic spectrometry gas detection apparatus based on infrared light source | |
| CN107966419B (en) | On-line measuring device for absolute humidity of gas in flue gas or pipeline gas | |
| CN104020114A (en) | Method for analyzing trace concentration of ammonia gas | |
| CN102288574A (en) | Device and method for quantitatively analyzing concentration of multi-component oil fume | |
| CN110702611A (en) | Laser photoacoustic spectrum oil gas online monitoring system | |
| CN102706831A (en) | Frequency-domain Tera Hertz device and method for monitoring CO concentration in coal spontaneous combustion gas | |
| CN110514621A (en) | Ocean original position pCO2Sensor | |
| CN103760108A (en) | Optoacoustic differential measurement method and device of humidity of wet steam | |
| CN112710628B (en) | Ultrasensitive SF based on broadband double-optical comb spectrum 6 Method for detecting gas decomposition component | |
| CN101813618A (en) | Device and method for simultaneously detecting plurality of gases based on optoacoustic effect | |
| KR101012463B1 (en) | Gas extraction apparatus of transformer insulating oil | |
| CN103592225B (en) | Soil infrared photoacoustic spectra Quick testing instrument and soil physico-chemical property assay method thereof | |
| JP2013092524A (en) | Data acquisition method | |
| Wang et al. | Analysis of optical fiber methane gas detection system | |
| CN201653902U (en) | Opto-acoustic spectrum determiner | |
| CN110132891A (en) | Gas in Oil of Transformer detection system based on laser absorption spectrum | |
| CN210514072U (en) | Carbon dioxide isotope photoacoustic spectrum detection device based on quantum cascade laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120829 Effective date of abandoning: 20140709 |
|
| RGAV | Abandon patent right to avoid regrant |