CN207992053U - Gas content in transformer oil on-Line Monitor Device based on spectral absorption method - Google Patents
Gas content in transformer oil on-Line Monitor Device based on spectral absorption method Download PDFInfo
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- CN207992053U CN207992053U CN201820379123.4U CN201820379123U CN207992053U CN 207992053 U CN207992053 U CN 207992053U CN 201820379123 U CN201820379123 U CN 201820379123U CN 207992053 U CN207992053 U CN 207992053U
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Abstract
The Dynamic headspace degassing module of the gas content in transformer oil on-Line Monitor Device based on spectral absorption method that the utility model is related to a kind of, negative pressure constant temperature therein includes degassing bottle, the air path part being connected with degassing bottle and oil circuit part；It further include oil-gas mixer；Multicomponent gas concentration detection module based on TDLAS includes signal generator, lock-in amplifier, laser driver, laser selector, laser base, laser, fiber coupler, collimator, focalizer, detector, data collecting card, control module, flowmeter and air pump；Tested gas measurement accuracy caused by by background gas cross jamming that the utility model solves current gas measurement device is low, time of measuring is long, device is complicated, the problem of measurement gas is single, measuring environment narrow range has high certainty of measurement, time of measuring is short, device is simple, can measure multiple gases, and the advantage that measuring environment range is wide.
Description
Technical field
The utility model is related to transformer oil on-line monitoring technique field more particularly to a kind of changes based on spectral absorption method
Depressor oil dissolved gas content on-Line Monitor Device.
Background technology
Transformer is not only equipment the most expensive and important in electric power facility, and transformer fault or aging can cause
Very serious power grid accident.So being monitored in real time to transformer operating condition and health status, electric power is helped to improve
The safety and stability of facility.The characteristic gas type generated when being broken down due to transformer is more, to single group
Preliminary analysis can only be carried out to transformer fault by dividing gas to be monitored.And pass through the multimodal distribution characteristic to being dissolved in transformer oil
Gas is monitored, then can know the details of transformer fault, to more accurately judge transformer fault type with
Reason.Currently, the detection of Dissolved Gas Content in Transformer Oil includes mainly the technology of two aspects, i.e. Oil-gas Separation and multigroup
Divide gas detection.
Oil and gas separation method is distinguished mainly from principle dissolution equilibrium method and vacuum outgas method, the degassing of vacuum outgas method
Efficiency highest, but to ensure degasifying effect, the vacuum degree of stringent control system is needed, therefore to the vacuum degree and vacuum of system
Pump requires very high, causes that its is complicated, reliability is poor, is not suitable for on-line checking application.It is used in on-line monitoring equipment
Mainly dissolution equilibrium method, dissolution equilibrium method because balancing measures difference be divided into for mechanical oscillation method, Dynamic headspace method with
And membrane separating method etc., wherein mechanical oscillation method because its degassing rate it is higher, reproducible, often by as other degassing methods degassing
The standard of rate calibration, but operating process and device are relative complex, are not suitable for online equipment；Membrane separating method device is simple,
But degassing time is longer, cannot meet the requirement of on-line monitoring well, at present still in conceptual phase；Dynamic headspace method is
Online equipment applies more degassing method at present.Currently, frequently with high-purity N in Dynamic headspace method2Purging, cost are higher；Separately
Outside, by the way of setting agitating device or bubbling device in degassing bottom of bottle portion, oil dissolved gas is made to be separated to degassing bottle top
In the gas chamber in portion, but separating effect is to be improved.
Currently, gas-monitoring has two major classes method：Chemical analysis and spectra methods, chemical method mainly have chromatography
Method, mass spectrometry and chromatograph-mass spectrometer coupling analytic approach etc., have very high sensitivity, measurement result it is with a high credibility, but
Response speed is slow, can not application on site.Spectroscopic methodology includes Fourier Transform Infrared Spectroscopy technology (FTIR), optoacoustic spectroscopy
(PAS) and tunable diode laser absorption spectrometry law technology (TDLAS) etc..The equipment of fourier transform infrared spectroscopy is huger,
Response speed is also relatively slow；Existing optoacoustic gas measuring device is mainly incident on using single-ended single light source in gas cell,
The unicity of its light source determines that the type for measuring gas is few, and limitation is very big.In some studies using a light source
The mode of a corresponding gas cell solves multiple light courcess coupled problem, but with the increase of component, gas chamber also will accordingly increase, device
Complexity increase.
Invention content
The utility model provides a kind of gas content in transformer oil on-Line Monitor Device based on spectral absorption method, solution
Determined current gas measurement device tested gas measurement accuracy caused by by background gas cross jamming it is low, time of measuring is long,
The problem of device is complicated, and measurement gas is single, measuring environment narrow range；With high certainty of measurement, time of measuring is short, device letter
It is single, it can measure multiple gases, and the advantage that measuring environment range is wide.
In order to achieve the above object, the utility model is realized using following technical scheme：
Gas content in transformer oil on-Line Monitor Device based on spectral absorption method, includes the Dynamic headspace of negative pressure constant temperature
The module that deaerates and the multicomponent gas concentration detection module based on TDLAS；Wherein：
The Dynamic headspace degassing module of the negative pressure constant temperature, including the bottle that deaerates, the air path part being connected with degassing bottle and oil
Road part；It is characterized in that, further including oil-gas mixer；The air path part include be connected to degassing bottle top gas outlet with
Gas path pipe between the gas access of oil-gas mixer, and the oil that is successively set on along gas flow direction on gas path pipe
Gas filter device, pressure sensor, gas absorption cell, air pump, the first air valve, the second air valve and check valve；Wherein the first air valve
It is additionally provided with exhaust outlet, the second air valve is additionally provided with pure air entrance；The oil circuit part includes the oil inlet for being connected to degassing bottle
The first oil line pipe between hydraulic fluid port is sent with transformer, and is connected between the oil outlet and transformer oil return opening of degassing bottle
Second oil line pipe；First oil line pipe upper edge oil inlet direction is equipped with third fuel tap, the first fuel tap and the first level sensing successively
Device；The second fuel-displaced direction of oil line pipe upper edge is equipped with the second fuel tap and the 4th fuel tap successively, between the second fuel tap and the 4th fuel tap
The second oil line pipe pass through oil pump connect oil-gas mixer oil-in；The first oil circuit between first fuel tap and third fuel tap
Pipeline connects the mixed oil and gas outlet of oil-gas mixer；The second liquid level sensor and temperature sensor are set in degassing bottle；
The multicomponent gas concentration detection module based on TDLAS, including signal generator, lock-in amplifier, laser
Driver, laser selector, laser base, laser, fiber coupler, collimator, focalizer, detector, data are adopted
Truck, control module, flowmeter and air pump；Signal generator by output signal line respectively with lock-in amplifier, Laser Driven
Device connects, and laser driver is connect with laser selector, and laser selector is connect with more laser bases, every laser
It is corresponding respectively on device pedestal that laser is installed；Each laser by output optical fibre connect fiber coupler, fiber coupler it is defeated
Go out tail optical fiber connection collimator, collimator is mounted on the entry port of gas absorption cell, and the exit ports installation of gas absorption cell is poly-
Burnt device, the laser after focusing are received by detector, and detector connects lock-in amplifier by output signal line, lock-in amplifier
Output end connects the input terminal of data collecting card, and the output end of data collecting card controls mould by data line link control module
Block connection signal generator；The output end of the air inlet connection flowmeter of gas absorption cell, the gas outlet of gas absorption cell passes through
Air pump connects emission-control equipment.
The pressure sensor, air pump, the first air valve, the second air valve, third fuel tap, the first fuel tap, the first level sensing
Device, the second fuel tap, the 4th fuel tap, oil pump, the second liquid level sensor and temperature sensor are separately connected control system.
Second liquid level sensor is set to the top of degassing bottle, and temperature sensor is set to the lower part of degassing bottle.
The outside of the degassing bottle is equipped with controllable temperature electric heater unit.
The hydrocarbon filter device is polytetrafluoroethylene film.
The oil-gas mixer is static mixing tube.
The pure air entrance of second air valve passes through air filter and atmosphere.
The gas absorption cell is hollow optic fibre gas chamber, Huai Techi, Maurice Herriott pond or long light path gas chamber.
The laser is Distributed Feedback Laser.
The detector is photodetector.
Compared with prior art, the utility model has the beneficial effects that：
1, the Dynamic headspace of negative pressure constant temperature deaerates module compared with existing degasser：
1) oil-gas mixer is used to replace conventional bubbling or electromagnetic mixing apparatus, gas mixed by oil-gas mixer with oil
It closes, then is come into full contact with by oil pump so that air-fuel mixture is more efficient, and simplifies apparatus structure；
2) it is carrier gas to extract pure air, and compared with being purged with nitrogen, cost is lower；
3) bodies such as hollow optic fibre gas chamber, White (White), the pond pond Maurice Herriott (Herriott), long light path gas chamber are used
The smaller gas absorption cell of product, cooperation mid-infrared laser device realize the detection of ppb ranks, need oil mass and air demand small, be conducive to
Simplify degassing bottle structure, and degassing time is made to shorten；
4) degassing bottle uses negative pressure hot environment, improves the concentration of abjection gas, improves degassing rate；
5) degassing and the gas detection environment of constant temperature and pressure are used, the repeatability that deaerates is high, gas detection repeatability and precision
It is high；
2, the multicomponent gas concentration detection module based on TDLAS is compared with existing detection of gas with multiple constituents device：
1) the time-division multiplex technology based on Time share scanning is realized the real-time detection to multicomponent gas, realize while being detected
The concentration of Multiple components gas；
2) it utilizes fiber coupler to realize the design of a gas absorption cell, greatlies simplify the dress of detection of gas with multiple constituents
Set volume；
3) package unit does not need the chromatographic column of expendable carrier gas and aging easy to pollute and complicated air-path control system, can
Eliminate background gas cross jamming.
Description of the drawings
Fig. 1 is the structure diagram of the Dynamic headspace degassing module of negative pressure constant temperature described in the utility model.
Fig. 2 is the structure diagram of the multicomponent gas concentration detection module described in the utility model based on TDLAS.
In figure：101. 102. air pump of gas absorption cell, 103. first 104. second air valve of air valve, 105. air filter
106. 107. pressure sensor of check valve, 108. hydrocarbon filter device, 109. first 110. second fuel tap of fuel tap, 111. oil
Pump 116. temperature sensor 117. of the 4th fuel tap 115. of 112. oil-gas mixer, 113. third fuel tap 114. degassing bottle the
One 202. lock-in amplifier of liquid level sensor 118. second liquid level sensor, 201. signal generator, 203. laser driver
204. laser selector, 205. laser base, 206. laser, 207. fiber coupler, 208. collimator, 101. gas
213. flowmeter of body absorption cell 209. focalizer, 210. detector, 211. data collecting card, 212. control module, 102. gas
Pump
Specific implementation mode
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
Gas content in transformer oil on-Line Monitor Device described in the utility model based on spectral absorption method, including negative pressure
The Dynamic headspace degassing module of constant temperature and the multicomponent gas concentration detection module based on TDLAS；Wherein：
The module as shown in Figure 1, Dynamic headspace of negative pressure constant temperature described in the utility model deaerates, including degassing bottle 115, with it is de-
The connected air path part of gas cylinder 115 and oil circuit part；It further include oil-gas mixer 112；The air path part is de- including being connected to
Gas path pipe between the top gas outlet and the gas access of oil-gas mixer 112 of gas cylinder 115, and along gas flow direction
It is successively set on hydrocarbon filter device 108 on gas path pipe, pressure sensor 107, gas absorption cell 101, air pump 102,
One air valve 103, the second air valve 104 and check valve 106；Wherein the first air valve 103 is additionally provided with exhaust outlet, and the second air valve 104 is also set
There is pure air entrance；The oil circuit part include be connected to degassing bottle 115 oil inlet and transformer send between hydraulic fluid port the
One oil line pipe, and be connected to degassing bottle 115 oil outlet and transformer oil return opening between the second oil line pipe；First oil
Road pipeline upper edge oil inlet direction is equipped with third fuel tap 113, the first fuel tap 109 and the first liquid level sensor 117 successively；Second oil circuit
The fuel-displaced direction of pipeline upper edge is equipped with the second fuel tap 110 and the 4th fuel tap 114 successively, between the second fuel tap 110 and the 4th fuel tap 114
The second oil line pipe pass through oil pump 111 connect oil-gas mixer 112 oil-in；First fuel tap 109 and third fuel tap 113 it
Between the first oil line pipe connection oil-gas mixer 112 mixed oil and gas outlet；The second liquid level sensor is set in degassing bottle 115
118 and temperature sensor 116；
As shown in Fig. 2, the multicomponent gas concentration detection module described in the utility model based on TDLAS, including signal hair
Raw device 201, lock-in amplifier 202, laser driver 203, laser selector 204, laser base 205, laser 206,
Fiber coupler 207, collimator 208, focalizer 209, detector 210, data collecting card 211, control module 212, flowmeter
213 and air pump 102；Signal generator 201 is connected with lock-in amplifier 202, laser driver 203 respectively by output signal line
It connecing, laser driver 203 is connect with laser selector 204, and laser selector 204 is connect with more laser bases 205,
It is corresponding respectively on every laser base 205 that laser 206 is installed；Each laser 206 connects fiber coupling by output optical fibre
The output tail optical fiber of device 207, fiber coupler 207 connects collimator 208, and collimator 208 is mounted on entering for gas absorption cell 101
Port is penetrated, the exit ports of gas absorption cell 101 install focalizer 209, and the laser after focusing is received by detector 210, is detected
Device 210 connects lock-in amplifier 202 by output signal line, the output end connection data collecting card 211 of lock-in amplifier 202
Input terminal, by data line link control module 212,212 connection signal of control module occurs the output end of data collecting card 211
Device 201；The output end of the air inlet connection flowmeter 213 of gas absorption cell 101, the gas outlet of gas absorption cell 101 passes through gas
102 connection emission-control equipment of pump.
The pressure sensor 107, air pump 102, the first air valve 103, the second air valve 104, the 113, first oil of third fuel tap
Valve 109, the first liquid level sensor 117, the second fuel tap 110, the 4th fuel tap 114, oil pump 111, the second liquid level sensor 118 and temperature
Degree sensor 116 is separately connected control system.
Second liquid level sensor 118 is set to the top of degassing bottle 115, and temperature sensor 116 is set to degassing bottle 115
Lower part.
The outside of the degassing bottle 115 is equipped with controllable temperature electric heater unit.
The hydrocarbon filter device 108 is polytetrafluoroethylene film.
The oil-gas mixer 112 is static mixing tube.
The pure air entrance of second air valve 104 passes through air filter 105 and atmosphere.
The gas absorption cell 101 is hollow optic fibre gas chamber, Huai Techi, Maurice Herriott pond or long light path gas chamber.
The laser is Distributed Feedback Laser.
The detector is photodetector.
The work of gas content in transformer oil on-Line Monitor Device described in the utility model based on spectral absorption method is former
Reason is：Signal generator 201 generates high frequency sinusoidal signal, and the low frequency triangular signal generated with laser driver 203 is superimposed,
It is loaded into jointly on laser 206, while low frequency triangular wave carries out linear scan, the Output optical power of laser 206
It is modulated along with high frequency sinusoidal, then, the wavelength of laser 206 is modulated, and such high frequency modulated can inhibit low-frequency range
Ambient noise interference, improve the measurement sensitivity of system.Laser 206 exports the laser of under test gas absorption line wavelength,
By gas absorption cell 101, received by detector 210, after being amplified by amplifying circuit, through lock-in amplifier 202 demodulate containing
The second harmonic signal of concentration information；The output signal of lock-in amplifier 202 collects control module via A/D conversion circuits again
In 212, processing, display, storage of data etc. are carried out.
The Dynamic headspace degassing module of negative pressure constant temperature described in the utility model, using oil-gas mixer 112 to transformer oil
Oil gas in sample carries out mixing homogenizing, and then gas mixture is introduced into the degassing bottle 115 of negative pressure high temperature, improves Oil-gas Separation
Efficiency, while using the gas absorption cell 101 of small volume, device overall structure being made more to simplify；Using constant temperature and pressure environment,
Keep degassing time short, the repeatability that deaerates is high.
Multicomponent gas concentration detection module described in the utility model based on TDLAS, the Dynamic headspace with negative pressure constant temperature
The module that deaerates shares a gas absorption cell 101, and time-division multiplex technology based on Time share scanning is realized to multicomponent gas
Detection in real time.It controls the working condition with switched laser driver 203 by control module 212, from a series of laser
It selects measuring beam to imported into light path in device 206 successively, realizes the timesharing sequence detection to multicomponent gas.Utilize light
Fine coupler detects the concentration of multiple gases simultaneously, greatly simplifies the structure of device.Package unit does not need expendable load
Gas and the chromatographic column of aging easy to pollute and complicated air-path control system, can eliminate background gas cross jamming, can detect simultaneously
Concentration, high certainty of measurement, the time of measuring of Multiple components gas are short.
Compared with other same devices, the advantage of the utility model is：In terms of degassing, it is to carry to extract pure air
Gas is not necessarily to consumptive material；Using the gas absorption cell 101 of small volume, such as hollow optic fibre gas chamber, White White pond, Herriott
Maurice Herriott pond, long light path gas chamber etc., this kind of gas absorption cell need oil mass and air demand small, facilitate and simplify degassing bottle structure,
So that degassing time shortens；Negative pressure hot environment is used simultaneously, improves the concentration of abjection gas, improves degassing rate；Constant temperature is permanent
The degassing of pressure makes device degassing repeatability high with gas detection environment, and gas detection repeatability and precision are high；Use static mixing
Pipe, which replaces being bubbled, adds electromagnetic mixing apparatus so that air-fuel mixture is more efficient, simplifies apparatus structure.In terms of gas detection, take
Traditional more gas chamber detection methods are formed, as long as the laser 206 of selection different wave length, is controlled and cut by control module 212
The working condition of laser driver 203 is changed, thus selects measuring beam to imported into detection successively from a series of laser 206
Light path realizes the timesharing sequence detection to multicomponent gas.
As shown in Figure 1, the gas content in transformer oil on-line monitoring dress described in the utility model based on spectral absorption method
In setting, the Dynamic headspace degassing module of negative pressure constant temperature has following several working conditions：
1) system initial state：
Oil circuit part, the first fuel tap 109 are disconnected；Second fuel tap disconnected 110；Third fuel tap 113 is disconnected；4th fuel tap 114 is disconnected.
Air path part, 1 mouthful, 3 mouthfuls of connections of the first air valve 103；4 mouthfuls, 6 mouthfuls of connections of the second air valve 104.
Air pump 102 stops, and oil pump 111 stops.
2) oiling state：
Under system initial state, the state of the second fuel tap 110 is become logical；Third fuel tap 113 is logical；Oil pump 111 is run
The position for reaching the second liquid level sensor 118 to oil level stops.
3) oil extraction state：
Under system initial state, the first fuel tap 109 is logical；4th fuel tap 114 is logical；The operation of oil pump 111 to oil level reaches the
The position of one liquid level sensor 117 stops.
4) state is purged outside gas circuit：
Under system initial state, the first fuel tap 109 is logical；By 1 mouthful of the first air valve 103,3 mouthfuls connection be changed to 1 mouthful, 2
Mouth connection；4 mouthfuls of second air valve 104,6 mouthfuls of connections are changed to 5 mouthfuls, 6 mouthfuls of connections；Air pump 102 is run.
5) purging state in gas circuit：
Under system initial state, the first fuel tap 109 is logical；Air pump 102 is run.
6) negative pressure state is taken out：
Under system initial state, 1 mouthful of the first air valve 103,3 mouthfuls of connections are changed to 1 mouthful, 2 mouthfuls of connections；Air pump 102
Operation stops when the pressure value that pressure sensor 107 measures reaches setting value.
7) gas chamber incision sample gas measures degassing phase：
Under system initial state, the first fuel tap 109 is logical；Second fuel tap 110 is logical；Air pump 102 is run；Oil pump 111 is run.
8) oil processing state before oil extraction：
Under system initial state, the first fuel tap 109 is logical；1 mouthful of first air valve 103,3 mouthfuls of connections be changed to 1 mouthful, 2 mouthfuls
Connection；Air pump 102 is run.
Each fuel tap, air valve, oil pump, the break-make situation of air pump are as shown in table 1 in above-mentioned working condition.
Table 1
The course of work of the Dynamic headspace degassing module of negative pressure constant temperature is divided into following eight steps：The first step, initialization；The
Two steps, oil circuit rinse；Third walks, purging；4th step, gas circuit take out negative pressure；5th step, sample introduction oil；6th step, degassing sampling；The
Seven steps, the oil processing before oil extraction；8th step, oil extraction.Share 13 courses of work i.e.：Original state → pumping negative pressure → oil extraction → note
Purging → pumping negative pressure → oiling → degassing sampling → oil processing outside purging → gas circuit in purging → gas circuit outside oil → oil extraction → gas circuit
→ acquiescence.Wherein：
Situation is abnormal when initialization procedure is to cope with system operation, as gas room pressure is unstable or still has residual
When oily, it can prevent oil sample from polluting by taking out negative pressure, main includes primary pumping negative pressure and an oil extraction process.
Oil circuit flushing process be in order to eliminate last measure after, remaining in deaerate bottle 115 and 2 oil line pipes
The influence that this is measured of sample oil, include mainly that oiling and oil extraction are each primary.
Purge is mainly carried out in air path part, including outer purging, interior purging and second of outer purging for the first time, is blown outside
Air enters air path part by air filter 105 from air when sweeping, and flows into air after being purged to whole device again；It is interior
There was only the work of air pump 102 when purging, whole system is still closed.
Gas circuit takes out negative pressure process, is to make system keep negative pressure state.
Sample introduction oil process is realized by oil circuit part, is stopped by 118 control oil pump 111 of the second liquid level sensor, including one
Secondary oiling process.
Degassing sampling process is realized that gas is mixed by oil-gas mixer 112 with oil by degassing bottle 115 jointly with air path part
After conjunction, then by oil pump 111, oil gas is made to come into full contact with.
Oil processing process carries out after sampling before oil extraction, it is therefore an objective to the excessive gas in sample oil be discharged.
Oil extraction process is stopped by 117 control oil pump 111 of the first liquid level sensor, and system initial state is returned to after oil extraction,
It is ready for next working cycles.
As shown in Fig. 2, the gas content in transformer oil on-line monitoring dress described in the utility model based on spectral absorption method
In setting, the multicomponent gas concentration detection module based on TDLAS is to be arranged 4 lasers, while for detecting 6 kinds of gases；Table 2
For the detail parameters of selected laser.
Table 2
Detection method is as follows：
1) under test gas is filled with by flowmeter 213 in gas absorption cell 101, flowmeter 213 is for monitoring gas suction
Gas flow in receives pond.
2) control module 212 generates two paths of signals by control signal generator 201, and reference signal is sent to locking phase and put all the way
The reference edge of big device 202, all the way modulated signal send to laser driver 203.Control module is mainly for the treatment of collected number
According to, and control signal generator 201 generates different signals, and then the working condition of switched laser driver 203, realizes and divides
When multi-channel scanning.
3) laser driver 203 coordinates laser selector 204 and laser base 205 to modulate laser 206
Output；Switched by different lasers 206, generate the light of different wave length, carries out Time share scanning.
4) the output tail optical fiber of laser 206 is coupled through fiber coupler 207, the collimation that collimator 208 is formed after collimating
Hot spot, sequence is scanned 6 kinds of gases respectively in gas absorption cell 101, and emergent light converges at detector by focalizer 209
On 210.
5) signal that detector 210 exports is input to the signal end of lock-in amplifier 202, what lock-in amplifier 202 obtained
Harmonic signal is sent into data collecting card 211.
6) processing and operation will be carried out in all data transmissions to control module 212 in data collecting card 211；Control mould
Measurement error is modified caused by variation of the block 212 to the environment temperature and pressure of gas absorption cell 101, is obtained accurately dense
Angle value.
7) gas after detection is sent by emission-control equipment by air pump 102 and carries out exhaust-gas treatment.
The control module uses microcontroller or PLC.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not
Be confined to this, any one skilled in the art within the technical scope disclosed by the utility model, according to this practicality
Novel technical solution and its design is subject to equivalent substitution or change, should be covered within the scope of the utility model.
Claims (10)
1. the gas content in transformer oil on-Line Monitor Device based on spectral absorption method, which is characterized in that including negative pressure constant temperature
The Dynamic headspace degassing module and multicomponent gas concentration detection module based on TDLAS；Wherein：
The Dynamic headspace degassing module of the negative pressure constant temperature, including the bottle that deaerates, the air path part being connected with degassing bottle and oil circuit portion
Point；It is characterized in that, further including oil-gas mixer；The air path part includes being connected to top gas outlet and the oil gas of degassing bottle
Gas path pipe between the gas access of mixer, and the oil gas mistake that is successively set on along gas flow direction on gas path pipe
Filter device, pressure sensor, gas absorption cell, air pump, the first air valve, the second air valve and check valve；Wherein the first air valve is also set
There are exhaust outlet, the second air valve to be additionally provided with pure air entrance；The oil circuit part includes oil inlet and the change for being connected to degassing bottle
Depressor send the first oil line pipe between hydraulic fluid port, and second be connected between the oil outlet and transformer oil return opening of degassing bottle
Oil line pipe；First oil line pipe upper edge oil inlet direction is equipped with third fuel tap, the first fuel tap and the first liquid level sensor successively；The
The two fuel-displaced directions of oil line pipe upper edge successively be equipped with the second fuel tap and the 4th fuel tap, second between the second fuel tap and the 4th fuel tap
Oil line pipe connects the oil-in of oil-gas mixer by oil pump；The first oil line pipe between first fuel tap and third fuel tap connects
Connect the mixed oil and gas outlet of oil-gas mixer；The second liquid level sensor and temperature sensor are set in degassing bottle；
The multicomponent gas concentration detection module based on TDLAS, including signal generator, lock-in amplifier, Laser Driven
Device, laser selector, laser base, laser, fiber coupler, collimator, focalizer, detector, data collecting card,
Control module, flowmeter and air pump；Signal generator is connected with lock-in amplifier, laser driver respectively by output signal line
It connects, laser driver is connect with laser selector, and laser selector is connect with more laser bases, every laser bottom
It is corresponding respectively on seat that laser is installed；Each laser connects fiber coupler, the output tail of fiber coupler by output optical fibre
Fibre connection collimator, collimator are mounted on the entry port of gas absorption cell, and the exit ports of gas absorption cell install focalizer,
Laser after focusing is received by detector, and detector connects lock-in amplifier, the output of lock-in amplifier by output signal line
The input terminal of end connection data collecting card, by data line link control module, control module connects the output end of data collecting card
Connect signal generator；The output end of the air inlet connection flowmeter of gas absorption cell, the gas outlet of gas absorption cell passes through air pump
Connect emission-control equipment.
2. the gas content in transformer oil on-Line Monitor Device according to claim 1 based on spectral absorption method, special
Sign is, the pressure sensor, air pump, the first air valve, the second air valve, third fuel tap, the first fuel tap, the first level sensing
Device, the second fuel tap, the 4th fuel tap, oil pump, the second liquid level sensor and temperature sensor are separately connected control system.
3. the gas content in transformer oil on-Line Monitor Device according to claim 1 or 2 based on spectral absorption method,
It is characterized in that, second liquid level sensor is set to the top of degassing bottle, and temperature sensor is set to the lower part of degassing bottle.
4. the gas content in transformer oil on-Line Monitor Device according to claim 1 based on spectral absorption method, special
Sign is that the outside of the degassing bottle is equipped with controllable temperature electric heater unit.
5. the gas content in transformer oil on-Line Monitor Device according to claim 1 based on spectral absorption method, special
Sign is that the hydrocarbon filter device is polytetrafluoroethylene film.
6. the gas content in transformer oil on-Line Monitor Device according to claim 1 based on spectral absorption method, special
Sign is that the oil-gas mixer is static mixing tube.
7. the gas content in transformer oil on-Line Monitor Device according to claim 1 based on spectral absorption method, special
Sign is that the pure air entrance of second air valve passes through air filter and atmosphere.
8. the gas content in transformer oil on-Line Monitor Device according to claim 1 based on spectral absorption method, special
Sign is that the gas absorption cell is hollow optic fibre gas chamber, Huai Techi, Maurice Herriott pond or long light path gas chamber.
9. the gas content in transformer oil on-Line Monitor Device according to claim 1 based on spectral absorption method, special
Sign is that the laser is Distributed Feedback Laser.
10. the gas content in transformer oil on-Line Monitor Device according to claim 1 based on spectral absorption method, special
Sign is that the detector is photodetector.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254338A (en) * | 2018-03-20 | 2018-07-06 | 哈工大鞍山工业技术研究院有限公司 | Gas content in transformer oil on-Line Monitor Device based on spectral absorption method |
| CN110470625A (en) * | 2019-08-26 | 2019-11-19 | 中国计量大学 | A kind of concentration of methane gas detection device |
| CN112082828A (en) * | 2020-08-04 | 2020-12-15 | 山东五岳电器有限公司 | Online gas taking detection device and method for transformer gas relay |
| CN112285051A (en) * | 2020-10-20 | 2021-01-29 | 国网重庆市电力公司电力科学研究院 | Optical detection system |
| CN114279972A (en) * | 2021-12-24 | 2022-04-05 | 中国科学院电工研究所 | Gas degassing device in oil for full-automatic photoacoustic spectrometry detector |
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2018
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254338A (en) * | 2018-03-20 | 2018-07-06 | 哈工大鞍山工业技术研究院有限公司 | Gas content in transformer oil on-Line Monitor Device based on spectral absorption method |
| CN108254338B (en) * | 2018-03-20 | 2023-10-13 | 湖南五凌电力科技有限公司 | Online monitoring device for gas content in transformer oil based on spectrum absorption method |
| CN110470625A (en) * | 2019-08-26 | 2019-11-19 | 中国计量大学 | A kind of concentration of methane gas detection device |
| CN112082828A (en) * | 2020-08-04 | 2020-12-15 | 山东五岳电器有限公司 | Online gas taking detection device and method for transformer gas relay |
| CN112285051A (en) * | 2020-10-20 | 2021-01-29 | 国网重庆市电力公司电力科学研究院 | Optical detection system |
| CN114279972A (en) * | 2021-12-24 | 2022-04-05 | 中国科学院电工研究所 | Gas degassing device in oil for full-automatic photoacoustic spectrometry detector |
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