CN108982660A - Transformer insulation oil moisture content on-Line Monitor Device and method - Google Patents
Transformer insulation oil moisture content on-Line Monitor Device and method Download PDFInfo
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- CN108982660A CN108982660A CN201810828604.3A CN201810828604A CN108982660A CN 108982660 A CN108982660 A CN 108982660A CN 201810828604 A CN201810828604 A CN 201810828604A CN 108982660 A CN108982660 A CN 108982660A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/022—Fluid sensors based on microsensors, e.g. quartz crystal-microbalance [QCM], surface acoustic wave [SAW] devices, tuning forks, cantilevers, flexural plate wave [FPW] devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/022—Liquids
- G01N2291/0226—Oils, e.g. engine oils
Abstract
The embodiment of the invention provides a kind of transformer insulation oil moisture content on-Line Monitor Devices, comprising: frequency of oscillation counter, oil sample Constant Temperature Detection chamber and crystal oscillator；The crystal oscillator, surface are coated with hydrophilic coating, and it is intracavitary to be mounted on the oil sample Constant Temperature Detection, for generating frequency of oscillation and being transmitted to the frequency of oscillation counter；The oil sample Constant Temperature Detection chamber, inside is equipped with the crystal oscillator, for containing transformer insulation oil；The frequency of oscillation counter, connect with the crystal oscillator, and for recording the frequency of oscillation of crystal oscillator generation, the variation of the frequency of oscillation generated according to the crystal oscillator obtains transformer insulation oil moisture content.The embodiment of the invention also provides a kind of transformer insulation oil moisture content on-line monitoring method, the method is realized by described device.The present invention can quickly, conveniently, accurately monitor the content of moisture in transformer insulation oil on-line.
Description
Technical field
The present embodiments relate to transformer insulation oil performance monitoring technique field more particularly to a kind of transformer insulation oils
Moisture content on-Line Monitor Device and method.
Background technique
The quality of transformer insulation oil performance is directly related to the safe operation and service life of transformer.It is transformer insulated
Trace moisture content is to influence one of the principal element of oil product dielectric strength in oil.Pass through the moisture in detection transformer insulation oil
Content not only can prevent transformer insulation oil dielectric strength to be reduced to danger level, can also be to transformer integral insulation shape
Condition is assessed.
Currently, moisture content mainly uses coulometry and chromatography in China's power industry detection transformer insulation oil.This
A little methods require to acquire a certain amount of oil product, are then detected in the lab.It may draw in acquisition and transportational process
The variation for playing water content in oil content, to cause measurement result inconsistent with virtual condition.There is also chemical reagent dirts for coulometry
Dye, needs the problems such as regularly replacing reagent.In recent years, the research of Water Content in Transformer Oil on-line monitoring is increasingly weighed
Depending on also becoming the inexorable trend of Water Content in Transformer Oil monitoring development.By on-line monitoring, W/O can be known at any time
Divide the variation of content, timely early warning is time saving and energy saving.
Summary of the invention
For studying a question for on-line monitoring, the embodiment of the invention provides a kind of transformer insulation oil moisture content is online
Monitoring device and method.
On the one hand, the embodiment of the invention provides a kind of transformer insulation oil moisture content on-Line Monitor Devices, comprising: vibration
Swing frequency counter, oil sample Constant Temperature Detection chamber and crystal oscillator；The crystal oscillator, surface are coated with hydrophilic coating, and it is permanent to be mounted on the oil sample
Temperature detector survey is intracavitary, for generating frequency of oscillation and being transmitted to the frequency of oscillation counter；The oil sample Constant Temperature Detection chamber, it is internal
The crystal oscillator is installed, for containing transformer insulation oil；The frequency of oscillation counter, connect, for remembering with the crystal oscillator
The frequency of oscillation that crystal oscillator generates is recorded, the variation of the frequency of oscillation generated according to the crystal oscillator obtains transformer insulation oil moisture and contains
Amount.Transformer insulation oil moisture content on-Line Monitor Device provided by the invention can supervise online with Gases Dissolved in Transformer Oil
It surveys device to be used in series, also can be used alone.Above-mentioned transformer insulation oil moisture content on-Line Monitor Device can be in transformer belt
It is installed in electric situation, easy to operate, for diagnosis transformer dampness failure, the development for instructing repair based on condition of component to work has very heavy
The meaning wanted.
On the other hand, described the embodiment of the invention provides a kind of transformer insulation oil moisture content on-line monitoring method
Method is realized by above-mentioned transformer insulation oil moisture content on-Line Monitor Device, comprising: transformer insulation oil is injected the oil
Sample Constant Temperature Detection chamber, according to the original frequency of crystal oscillator described in the frequency of oscillation counter records；Using the frequency of oscillation meter
Number device, the frequency of the crystal oscillator after recording water adsorption equilibrium state；After the original frequency and water adsorption equilibrium state
Crystal oscillator frequency, calculated using quality algorithm and obtain transformer insulation oil moisture content.
The embodiment of the invention provides a kind of transformer insulation oil moisture content on-Line Monitor Device and methods, by oil
Crystal oscillator is set in sample Constant Temperature Detection chamber, then using frequency of oscillation counter calculate crystal oscillator difference on the frequency, finally by oil pump from
Oil sample is acquired in transformer, can quickly, conveniently, accurately monitor the content of moisture in transformer insulation oil on-line.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in first embodiment of the invention；
Fig. 2 is transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in second embodiment of the invention；
Fig. 3 is transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in third embodiment of the invention；
Fig. 4 is transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in fourth embodiment of the invention；
Fig. 5 is transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in fifth embodiment of the invention；
Fig. 6 is transformer insulation oil moisture content on-line monitoring method flow chart in sixth embodiment of the invention；
Fig. 7 is transformer insulation oil moisture content on-line monitoring method flow chart in seventh embodiment of the invention；
Fig. 8 is transformer insulation oil moisture content on-line monitoring method flow chart in eighth embodiment of the invention；
Fig. 9 is transformer insulation oil moisture content on-line monitoring method flow chart in ninth embodiment of the invention；
Figure 10 is transformer insulation oil moisture content on-line monitoring method flow chart in tenth embodiment of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of transformer insulation oil moisture content on-Line Monitor Device and methods.Referring to Fig. 1,
Fig. 1 is transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in first embodiment of the invention, comprising:
Frequency of oscillation counter 101, oil sample Constant Temperature Detection chamber 102, crystal oscillator 103 and conducting wire 104；
The crystal oscillator 103 (in another embodiment, crystal oscillator 103 is quartz crystal oscillator), surface is coated with hydrophilic coating, is mounted on
In the oil sample Constant Temperature Detection chamber 102, for generating frequency of oscillation and being transmitted to the frequency of oscillation counter 101；
The oil sample Constant Temperature Detection chamber 102, inside is equipped with the crystal oscillator 103, for containing transformer insulation oil；
(in another embodiment, frequency of oscillation counter 101 is TTL frequency of oscillation meter to the frequency of oscillation counter 101
Number device), it is connect by conducting wire 104 with the crystal oscillator 103, for recording the frequency of oscillation of the generation of crystal oscillator 103, according to the crystal oscillator
The variation of 103 frequencies of oscillation generated obtains transformer insulation oil moisture content.
Second embodiment of the invention is added to preposition pipeline on the basis of first embodiment, and referring to fig. 2, Fig. 2 is this hair
Transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in bright second embodiment, comprising:
(in another embodiment, crystal oscillator 202 can be cut two-sided by polyimides for AT for preposition pipeline 201, crystal oscillator 202
Quartz crystal resonant piece), conducting wire 203, oil sample Constant Temperature Detection chamber 204 and frequency of oscillation counter 205.
Preposition pipeline 201 is connect with oil sample Constant Temperature Detection chamber 204, for conveying transformer insulation oil and ensuring the transformation
The temperature of device insulating oil is constant.The connection of other devices other than preposition pipeline 201 and function with phase in first embodiment
Together, details are not described herein.
Third embodiment of the invention is added to oil sample Constant Temperature Detection device, referring to Fig. 3, Fig. 3 on the basis of second embodiment
It is transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in third embodiment of the invention, comprising:
Oil sample Constant Temperature Detection device 301, crystal oscillator 302, oil sample Constant Temperature Detection chamber 303, frequency of oscillation counter 304, preposition pipe
Road 305 and conducting wire 306.
Oil sample Constant Temperature Detection device 301 is mounted on preposition pipeline 305, and the oil sample Constant Temperature Detection device 301 becomes for detecting
The temperature of depressor insulating oil.The connections of other devices other than oil sample Constant Temperature Detection device 301 and function are and second embodiment
In it is identical, details are not described herein.
Fourth embodiment of the invention is added to valve on the basis of 3rd embodiment on preposition pipeline, referring to fig. 4,
Fig. 4 is transformer insulation oil moisture content on-Line Monitor Device structural schematic diagram in fourth embodiment of the invention, comprising:
Valve 401, preposition pipeline 402, oil sample Constant Temperature Detection device 403, crystal oscillator 404, oil sample Constant Temperature Detection chamber 405, oscillation
Frequency counter 406 and conducting wire 407.
Valve 401 is mounted on preposition pipeline 402, the valve 401 for control transformer insulation oil enter it is described before
Set pipeline 402.The connection of other devices is identical with 3rd embodiment as function, and details are not described herein.
Fifth embodiment of the invention is added to outer circulation circuit on the basis of fourth embodiment on preposition pipeline, ginseng
See that Fig. 5, Fig. 5 are transformer insulation oil moisture content on-Line Monitor Device structural schematic diagrams in fifth embodiment of the invention, comprising:
Outer circulation circuit 501, valve 502, preposition pipeline 503, oil sample Constant Temperature Detection device 504, oil sample Constant Temperature Detection chamber
505, crystal oscillator 506, conducting wire 507, frequency of oscillation counter 508, oil pump 509, transformer 510 and transformer insulation oil flow direction instruction
Arrow 511.
The preposition pipeline 503 is connect with outer circulation circuit 501, and oil pump 509 is housed on the outer circulation circuit 501, is become
Depressor insulating oil in transformer 510 by oil pump 509 from being pumped into the outer circulation circuit 501, and valve 502 is opened, transformer
Insulating oil is inputted in the preposition pipeline 503 by the outer circulation circuit 501.Transformer insulation oil flows to arrow 511
Indicate the flow direction of transformer insulation oil.The connection of other devices is identical with fourth embodiment as function, herein not
It repeats again.
It is transformer insulation oil moisture content on-line monitoring method process in sixth embodiment of the invention referring to Fig. 6, Fig. 6
Figure, the method are realized by the device in first embodiment, comprising:
S601: by transformer insulation oil, (in another embodiment, the transformer insulation oil can be 220kV transformer
Chromatography oil) the injection oil sample Constant Temperature Detection chamber, according to the original frequency of crystal oscillator described in the frequency of oscillation counter records.
S602: using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state.
S603: according to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, using quality algorithm meter
It calculates and obtains transformer insulation oil moisture content.
The quality algorithm is specially Sauerbrey equation, and the expression formula of Sauerbrey equation is as follows:
In formula (1), f0It is crystal oscillator original resonance frequency (unit Hz), Δ f is that (unit is for the frequency variation of crystal oscillator
), Hz Δ m is crystal oscillator mass change (unit g/cm2), the matter of the water content in oil of mass change Δ m indication transformer insulation herein
Amount, A is crystal oscillator effective area (i.e. electrode area, unit cm2), ρ is the density of crystal oscillator, and μ is the crystal oscillator coefficient of rigidity.
It is transformer insulation oil moisture content on-line monitoring method process in seventh embodiment of the invention referring to Fig. 7, Fig. 7
Figure, the method are realized by the device in second embodiment, comprising:
S701: injecting the preposition pipeline for transformer insulation oil, and ensures transformer insulation oil in the preposition pipeline
Interior temperature is constant.
S702: the constant transformer insulation oil of temperature is injected into the oil sample Constant Temperature Detection chamber, according to the frequency of oscillation
The original frequency of crystal oscillator described in counter records.
S703: using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state.
S704: according to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, using quality algorithm meter
It calculates and obtains transformer insulation oil moisture content.
It is transformer insulation oil moisture content on-line monitoring method process in eighth embodiment of the invention referring to Fig. 8, Fig. 8
Figure, the method are realized by the device in 3rd embodiment, comprising:
S801: injecting the preposition pipeline for transformer insulation oil, by the oil sample Constant Temperature Detection device detect it is described before
Set the temperature of the transformer insulation oil in pipeline, it is ensured that transformer insulation oil temperature in the preposition pipeline is constant.
S802: the constant transformer insulation oil of temperature is injected into the oil sample Constant Temperature Detection chamber, according to the frequency of oscillation
The original frequency of crystal oscillator described in counter records.
S803: using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state.
S804: according to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, using quality algorithm meter
It calculates and obtains transformer insulation oil moisture content.
It is transformer insulation oil moisture content on-line monitoring method process in ninth embodiment of the invention referring to Fig. 9, Fig. 9
Figure, the method are realized by the device in fourth embodiment, comprising:
S901: transformer insulation oil is injected the preposition pipeline, passes through the oil by the switch by controlling the valve
Sample Constant Temperature Detection device detects the temperature of the transformer insulation oil in the preposition pipeline, it is ensured that transformer insulation oil is described preposition
Temperature is constant in pipeline.
S902: the constant transformer insulation oil of temperature is injected into the oil sample Constant Temperature Detection chamber, according to the frequency of oscillation
The original frequency of crystal oscillator described in counter records.
S903: using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state.
S904: according to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, using quality algorithm meter
It calculates and obtains transformer insulation oil moisture content.
It is transformer insulation oil moisture content on-line monitoring method process in tenth embodiment of the invention referring to Figure 10, Figure 10
Figure, the method are realized by the device in the 5th embodiment, comprising:
S1001: the oil pump by transformer insulation oil, from pump in transformer, into the outer circulation circuit, open by the valve
It opens, transformer insulation oil is injected into the preposition pipeline, is detected in the preposition pipeline by the oil sample Constant Temperature Detection device
The temperature of transformer insulation oil, it is ensured that transformer insulation oil temperature in the preposition pipeline is constant.
S1002: the constant transformer insulation oil of temperature is injected into the oil sample Constant Temperature Detection chamber, according to the frequency of oscillation
The original frequency of crystal oscillator described in counter records.
S1003: using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state.
S1004: according to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, using quality algorithm meter
It calculates and obtains transformer insulation oil moisture content.
Eleventh embodiment of the invention introduces the specific value of parameters on the basis of ten embodiments, comprising:
AT singulation face is fitted into oil sample Constant Temperature Detection chamber by the Quartz crystal resonant piece of polyimides, and by conducting wire with
The connection of TTL frequency of oscillation counter.
One outer circulation circuit is installed on certain 500kV transformer, oil pump circulation is opened after ten minutes, opens oil sample constant temperature
Detector front valve quantitatively injects 5 cubic centimetres of oil sample into segment pipe before oil sample Constant Temperature Detection device.It is to be measured after 3 minutes
Transformer oil temperature is constant, is again turned on oil sample Constant Temperature Detection device front valve, fixed into segment pipe before oil sample Constant Temperature Detection device
Amount injects 5 cubic centimetres of oil sample, and the transformer to be measured of constant temperature then injects in oil sample Constant Temperature Detection chamber before.
The frequency f1 for recording original state Quartz crystal resonant piece after oil sample injects records water adsorption balance after 2 minutes
The frequency f2 of state Quartz crystal resonant piece is gone out to try by frequency changes delta f (Δ f=f1-f2) according to Sauerbrey equation calculation
The variation of front and back Quartz crystal resonant tablet quality is tested, that is, the quality of moisture in injected oil sample, to calculate in transformer oil
The content of moisture is 7mg/L.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of transformer insulation oil moisture content on-Line Monitor Device characterized by comprising
Frequency of oscillation counter, oil sample Constant Temperature Detection chamber and crystal oscillator；
The crystal oscillator, surface are coated with hydrophilic coating, and it is intracavitary to be mounted on the oil sample Constant Temperature Detection, for generating frequency of oscillation and passing
It is sent to the frequency of oscillation counter；
The oil sample Constant Temperature Detection chamber, inside is equipped with the crystal oscillator, for containing transformer insulation oil；
The frequency of oscillation counter, connect with the crystal oscillator, for recording the frequency of oscillation of crystal oscillator generation, according to the crystal oscillator
The variation of the frequency of oscillation of generation obtains transformer insulation oil moisture content.
2. the apparatus according to claim 1, which is characterized in that the transformer insulation oil moisture content on-Line Monitor Device
Further include: preposition pipeline, the preposition pipeline are connect with the oil sample Constant Temperature Detection chamber, for conveying transformer insulation oil and true
The temperature for protecting the transformer insulation oil is constant.
3. the apparatus of claim 2, which is characterized in that oil sample Constant Temperature Detection device is installed on the preposition pipeline,
The oil sample Constant Temperature Detection device is used to detect the temperature of transformer insulation oil.
4. device according to claim 3, which is characterized in that be equipped with valve on the preposition pipeline, the valve is used
Enter the preposition pipeline in control transformer insulation oil.
5. device according to claim 4, which is characterized in that the preposition pipeline is connect with outer circulation circuit, described outer
Oil pump is housed, the transformer insulation oil is pumped into the outer circulation circuit by oil pump, and by described outer on circulation loop
Circulation loop inputs the preposition pipeline.
6. a kind of transformer insulation oil moisture content on-line monitoring method, the method are realized by device described in claim 1,
It is characterised by comprising:
Transformer insulation oil is injected into the oil sample Constant Temperature Detection chamber, according to crystal oscillator described in the frequency of oscillation counter records
Original frequency；
Using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state；
According to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, is calculated and become using quality algorithm
Depressor insulating oil moisture content.
7. a kind of transformer insulation oil moisture content on-line monitoring method, the method are realized by device as claimed in claim 2,
It is characterised by comprising:
Transformer insulation oil is injected into the preposition pipeline, and ensures that transformer insulation oil temperature in the preposition pipeline is permanent
It is fixed；
The constant transformer insulation oil of temperature is injected into the oil sample Constant Temperature Detection chamber, according to the frequency of oscillation counter records
The original frequency of the crystal oscillator；
Using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state；
According to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, is calculated and become using quality algorithm
Depressor insulating oil moisture content.
8. a kind of transformer insulation oil moisture content on-line monitoring method, the method are realized by device as claimed in claim 3,
It is characterised by comprising:
Transformer insulation oil is injected into the preposition pipeline, is detected in the preposition pipeline by the oil sample Constant Temperature Detection device
The temperature of transformer insulation oil, it is ensured that transformer insulation oil temperature in the preposition pipeline is constant；
The constant transformer insulation oil of temperature is injected into the oil sample Constant Temperature Detection chamber, according to the frequency of oscillation counter records
The original frequency of the crystal oscillator；
Using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state；
According to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, is calculated and become using quality algorithm
Depressor insulating oil moisture content.
9. a kind of transformer insulation oil moisture content on-line monitoring method, the method are realized by device as claimed in claim 4,
It is characterised by comprising:
By controlling the switch of the valve, transformer insulation oil is injected into the preposition pipeline, is examined by the oil sample constant temperature
Survey the temperature that device detects the transformer insulation oil in the preposition pipeline, it is ensured that transformer insulation oil is warm in the preposition pipeline
It spends constant；
The constant transformer insulation oil of temperature is injected into the oil sample Constant Temperature Detection chamber, according to the frequency of oscillation counter records
The original frequency of the crystal oscillator；
Using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state；
According to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, is calculated and become using quality algorithm
Depressor insulating oil moisture content.
10. a kind of transformer insulation oil moisture content on-line monitoring method, the method device as described in claim 5 is real
It is existing characterized by comprising
Transformer insulation oil is pumped into the outer circulation circuit by the oil pump, and the valve opening infuses transformer insulation oil
Enter the preposition pipeline, the temperature of the transformer insulation oil in the preposition pipeline detected by the oil sample Constant Temperature Detection device,
Ensure that transformer insulation oil temperature in the preposition pipeline is constant；
The constant transformer insulation oil of temperature is injected into the oil sample Constant Temperature Detection chamber, according to the frequency of oscillation counter records
The original frequency of the crystal oscillator；
Using the frequency of oscillation counter, the frequency of the crystal oscillator after recording water adsorption equilibrium state；
According to the frequency of the crystal oscillator after the original frequency and water adsorption equilibrium state, is calculated and become using quality algorithm
Depressor insulating oil moisture content.
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