CN114397263A - Method, device, equipment and medium for measuring content of functional groups of transformer oil sample - Google Patents
Method, device, equipment and medium for measuring content of functional groups of transformer oil sample Download PDFInfo
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- CN114397263A CN114397263A CN202210008691.4A CN202210008691A CN114397263A CN 114397263 A CN114397263 A CN 114397263A CN 202210008691 A CN202210008691 A CN 202210008691A CN 114397263 A CN114397263 A CN 114397263A
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- 125000000524 functional group Chemical group 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000000862 absorption spectrum Methods 0.000 claims abstract description 86
- 238000002835 absorbance Methods 0.000 claims abstract description 83
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 125000001931 aliphatic group Chemical group 0.000 claims description 8
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 claims 1
- 238000000691 measurement method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
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Abstract
The invention discloses a method, a device, equipment and a medium for measuring the content of functional groups of a transformer oil sample. The content measurement method comprises the following steps: acquiring an infrared absorption spectrum of a functional group of the transformer oil sample and a background infrared absorption spectrum of the functional group of the transformer oil-free sample; determining absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum; determining the wavelength of infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum; and determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength. The method realizes accurate measurement of the content of the functional groups of the transformer oil sample, and the measurement method is simple and reliable.
Description
Technical Field
The embodiment of the invention relates to a technology for measuring the content of oil and gas functional groups, in particular to a method, a device, equipment and a medium for measuring the content of functional groups of a transformer oil sample.
Background
The transformer oil in the oil-immersed transformer has important significance for safe and stable operation of the transformer. However, there are many cases that the insulation test of the transformer oil is not qualified in the process of transferring and accepting the transformer, and the investigation finds that the transformer oil is not provided according to the contract requirement, so that the phenomena of 'good after one' and 'false and true after one' exist, and the phenomena cause great hidden troubles to the safety of a power grid. On the other hand, the case also shows that the insulation resistance of some main transformers does not reach the standard all the time, and the insulation resistance of some main transformers still does not meet the standard after oil filtering and other operations, and investigation finds that the used oil products are regenerated oil and other oil products which do not meet the contract. In order to avoid the phenomenon, the quality of the transformer oil needs to be discriminated.
However, in the prior art, the quality of the transformer oil is judged and discriminated by usually determining the content of dissolved gas, volume resistivity, dielectric loss, copper ions and the like in the oil, the method comprehensively judges the performance of the oil from the aspects of several physical properties, and the acquired parameters are more, so that the detection process is more complicated.
Disclosure of Invention
The invention provides a method, a device, equipment and a medium for measuring the content of functional groups of a transformer oil sample, which realize the measurement of the content of the functional groups of the transformer oil sample and have simple and reliable measurement method.
In a first aspect, an embodiment of the present invention provides a method for measuring a content of a functional group in a transformer oil sample, where the method includes:
acquiring an infrared absorption spectrum of a functional group of the transformer oil sample and a background infrared absorption spectrum of the functional group of the transformer oil-free sample;
determining absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum;
determining the wavelength of infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum;
and determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength.
Optionally, before determining the absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum, the method further includes:
extracting initial absorbance of the background infrared absorption spectrum;
determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength, comprising the following steps:
and determining the content of the specific optical energy group of the transformer oil sample according to the absorbance, the initial absorbance and the wavelength.
Optionally, determining an absorbance corresponding to a wavelength in a preset range according to the infrared absorption spectrum includes:
determining a first absorbance corresponding to a first preset range wavelength according to the infrared absorption spectrum; wherein the first preset range wavelength satisfies: 1600cm-1≤λ≤1650cm-1；
Determining a second absorbance corresponding to a second preset range wavelength according to the infrared absorption spectrum; wherein the second preset range wavelength satisfies: 700cm-1≤λ≤750cm-1。
Optionally, determining the content of the specific optical energy group of the transformer oil sample according to the absorbance, the initial absorbance and the wavelength comprises:
determining the content of aromatic hydrocarbon radicals in the transformer oil sample according to the first absorbance, the initial absorbance and the wavelength;
and determining the content of the aliphatic hydrocarbon group in the transformer oil sample according to the second absorbance, the initial absorbance and the wavelength.
Optionally, determining the content of aromatic hydrocarbon groups in the transformer oil sample according to the first absorbance, the initial absorbance and the wavelength specifically comprises:
wherein A isArA first absorbance corresponding to the first preset range wavelength; l is the wavelength; a. the0Is the initial absorbance;
determining the content of the aliphatic hydrocarbon group in the transformer oil sample according to the second absorbance, the initial absorbance and the wavelength, and specifically comprising the following steps:
wherein A isRThe second absorbance corresponds to the wavelength in the second preset range; l is the wavelength; a. the0Is the initial absorbance.
Optionally, determining the wavelength of the infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum includes:
selecting a wavelength difference in any range according to the background infrared absorption spectrum;
determining the number of interference fringes between the wavelength differences in the arbitrary range;
and determining the wavelength of the infrared light according to the wavelength difference and the number of the interference fringes.
Optionally, determining the wavelength of the infrared light according to the wavelength difference and the number of the interference fringes includes:
wherein n is the number of the interference fringes; the λ 1- λ 2 is the wavelength difference; l is the wavelength.
In a second aspect, an embodiment of the present invention provides an apparatus for measuring a content of a functional group in a transformer oil sample, the apparatus including:
the absorption spectrum acquisition module is used for acquiring an infrared absorption spectrum of the functional group of the transformer oil sample and a background infrared absorption spectrum of the functional group of the transformer oil-free sample;
the absorbance determination module is used for determining the absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum;
the wavelength determining module is used for determining the wavelength of infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum;
and the content determination module is used for determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength.
In a third aspect, embodiments of the present invention provide a computer device, which includes a memory, a processor and a computer program stored on the memory and executable on the processor, and when the processor executes the program, the processor implements the method for measuring the content of functional groups in a transformer oil sample according to the first aspect.
In a fourth aspect, the embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the method for measuring the content of functional groups in a transformer oil sample according to the first aspect.
According to the embodiment of the invention, the infrared absorption spectrum of the functional group of the transformer oil sample and the background infrared absorption spectrum of the functional group of the transformer oil-free sample are obtained; determining the absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum; determining the wavelength of infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum; and then determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength, so that the content measurement of the specific functional group of the transformer oil sample is realized, the authenticity of the transformer oil sample is judged, and meanwhile, the measurement method is simple and reliable.
Drawings
FIG. 1 is a flow chart of a method for measuring the content of functional groups in a transformer oil sample according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for measuring the content of functional groups in a transformer oil sample according to an embodiment of the present invention;
FIG. 3 is a graph of background infrared absorption spectra provided by an embodiment of the present invention;
FIG. 4 is a block diagram of a device for measuring the content of functional groups in a transformer oil sample according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart of a method for measuring the content of functional groups in a transformer oil sample according to an embodiment of the present invention, where this embodiment is applicable to a situation of measuring the content of functional groups in a transformer oil sample, and the method may be executed by a device for measuring the content of functional groups in a transformer oil sample, as shown in fig. 1, and specifically includes the following steps:
s110, acquiring an infrared absorption spectrum of the functional group of the transformer oil sample and a background infrared absorption spectrum of the functional group of the transformer oil-free sample.
The method for measuring the content of the functional groups of the transformer oil sample is suitable for a system for measuring the content of the functional groups of the transformer oil sample, and the system for measuring the content of the functional groups of the transformer oil sample comprises an infrared transmitter, an absorption pool, an infrared receiver and a controller; in the field test, a transformer oil sample is placed in an absorption tank, an infrared transmitter transmits infrared light with a certain frequency to the transformer oil sample in the absorption tank, an infrared receiver receives a feedback infrared light signal and transmits the feedback infrared light signal to a controller, and the controller generates an infrared absorption spectrum according to the feedback light signal; the basic principle of the infrared absorption spectrum is as follows: when a beam of infrared light with continuous wavelength passes through the transformer oil sample, and the vibration frequency or rotation frequency of a certain functional group in the transformer oil sample is the same as the frequency of the infrared light, the functional group absorbs the energy of the infrared light with the frequency, so that the controller can process the energy of the infrared light with the specific frequency absorbed by the functional group into a characteristic infrared absorption spectrogram (wavelength-absorbance relation diagram) according to the feedback infrared light signal. Meanwhile, a transformer oil sample does not need to be placed in the absorption cell, the infrared emitter emits infrared light with certain frequency to the absorption cell, the infrared receiver receives the fed back infrared light signal and sends the infrared light signal to the controller, and the controller can generate a background infrared absorption spectrum according to the fed back infrared light signal.
And S120, determining the absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum.
The light absorption of the functional group in the wavelength of the preset range can be determined according to the intrinsic property of the vibration coefficient of the functional group of the transformer oil sample, and the actual light absorption intensity corresponding to the wavelength of the preset range is extracted based on the infrared absorption spectrum.
And S130, determining the wavelength of the infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum.
The wavelength of the infrared light can represent the walking distance of the infrared light wave. The wavelength of the infrared light can be determined based on the background infrared absorption spectrum.
And S140, determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength.
According to the scheme, the content and the content of the specific light energy group of the transformer oil sample are measured by determining the absorbance corresponding to the wavelength of the preset range in the infrared absorption spectrum and determining the wavelength of the infrared light according to the background infrared absorption spectrum, so that the truth of the sample of the transformer is judged, and meanwhile, the measuring method is simple and reliable.
Optionally, on the basis of the foregoing embodiment, further detailed description is provided, and fig. 2 is a flowchart of a method for measuring a content of a functional group in a transformer oil sample according to an embodiment of the present invention, as shown in fig. 2, the method for measuring a content includes:
s210, acquiring an infrared absorption spectrum of the functional group of the transformer oil sample and a background infrared absorption spectrum of the functional group of the transformer oil-free sample.
And S220, extracting the initial absorbance of the background infrared absorption spectrum.
The infrared receiver receives the feedback infrared light signal and sends the feedback infrared light signal to the controller, the controller generates a background infrared absorption spectrum according to the feedback infrared light signal, and the controller extracts initial absorbance from the background infrared absorption spectrum so as to subsequently avoid the absorption influence of the absorption cell on the infrared light.
And S230, determining the absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum.
Wherein, different functional groups of the transformer oil sample have different light absorption in different preset range wavelengths due to different vibration coefficients of the different functional groups. Specifically, in order to measure and obtain the content of aromatic hydrocarbon in the transformer oil sample, firstly, according to the vibration coefficient of the aromatic hydrocarbon, the wavelength in the preset range is determined to be the wavelength in the first preset range; wherein, the first preset range wavelength satisfies: 1600cm-1≤λ≤1650cm-1Then, determining a first absorbance corresponding to the wavelength of a first preset range based on the infrared absorption spectrum; similarly, in order to measure and obtain the content of the fatty hydroxyl in the transformer oil sample, firstly, according to the vibration coefficient of the fatty hydrocarbon group, the wavelength of the preset range is determined to be the wavelength of a second preset range, wherein the wavelength of the second preset range satisfies the following conditions: 700cm-1≤λ≤750cm-1And then determining a second absorbance corresponding to a second preset range of wavelengths based on the infrared absorption spectrum.
And S240, determining the wavelength of the infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum.
Wherein determining the wavelength of the infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum comprises: selecting a wavelength difference in any range according to the background infrared absorption spectrum; determining the number of interference fringes between wavelength differences in any range; and determining the wavelength of the infrared light according to the wavelength difference and the number of the interference fringes. Specifically, the wavelength of the infrared light can be obtained according to the following formula:
wherein n is the number of interference fringes; λ 1- λ 2 are wavelength differences; l is the wavelength. FIG. 3 is a graph of background infrared absorption spectra provided by an embodiment of the present invention; as shown in FIG. 3, for example, the wavelength range of (942 cm) in the background infrared absorption spectrum is selected-1-1311cm-1) Internal wavelength difference of 369cm-1(ii) a Determining the number of interference fringes within the wavelength difference range to be 5, and determining the wavelength of infrared light to be 5
And S250, determining the content of the specific optical energy group of the transformer oil sample according to the absorbance, the initial absorbance and the wavelength.
The content of the two specific optical energy groups of the aromatic hydrocarbon group and the aliphatic hydrocarbon group in the transformer oil sample can represent the truth of the oil sample. Specifically, determining the content of aromatic hydrocarbon in the transformer oil sample according to the first absorbance, the initial absorbance and the wavelength; the method specifically comprises the following steps:
wherein A isArA first absorbance corresponding to a first preset range wavelength; l is the wavelength; a. the0Initial absorbance.
Determining the content of the aliphatic hydrocarbon group in the transformer oil sample according to the second absorbance, the initial absorbance and the wavelength, specifically:
wherein A isRA second absorbance corresponding to a second preset range wavelength; l is the wavelength; a. the0Initial absorbance. Thus depending on the content C of aromatic hydrocarbon groupsArAnd content of aliphatic hydrocarbon group CRIs used to judge the authenticity of the oil sample. On the basis of the embodiment, the content of the aromatic hydrocarbon group and the content of the aliphatic hydroxyl group in the transformer oil sample can be accurately determined by further referring to the initial absorbance, so that the truth of the oil sample can be accurately judged.
The embodiment of the invention also provides a device for measuring the content of the functional groups of the transformer oil sample, which can execute the method for measuring the content of the functional groups of the transformer oil sample provided by any embodiment of the invention and has the corresponding functional modules and beneficial effects of the execution method; FIG. 4 is a block diagram of a device for measuring the content of functional groups in a transformer oil sample according to an embodiment of the present invention; as shown in fig. 4, the apparatus for measuring the content of functional groups in a transformer oil sample comprises:
the absorption spectrum acquisition module 10 is used for acquiring an infrared absorption spectrum of a transformer oil sample functional group and a background infrared absorption spectrum of a transformer oil-free sample functional group;
the absorbance determination module 20 is configured to determine absorbance corresponding to a preset range wavelength according to the infrared absorption spectrum;
a wavelength determining module 30, configured to determine a wavelength of infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum;
and the content determination module 40 is used for determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength.
Fig. 5 is a schematic structural diagram of a computer apparatus according to an embodiment of the present invention, as shown in fig. 5, the apparatus includes a processor 70, a memory 71, an input device 72, and an output device 73; the number of processors 70 in the device may be one or more, and one processor 70 is taken as an example in fig. 5; the processor 70, the memory 71, the input device 72 and the output device 73 of the apparatus may be connected by a bus or other means, as exemplified by the bus connection in fig. 5.
The memory 71 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the method for measuring the content of functional groups in a transformer oil sample in the embodiment of the present invention. The processor 70 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the memory 71, so as to implement the above-mentioned method for measuring the content of functional groups in the transformer oil sample.
The memory 71 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 71 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 71 may further include memory located remotely from the processor 70, which may be connected to the device/terminal/server via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 72 may be used to receive entered numeric or character information and to generate key signal inputs relating to user settings and function controls of the apparatus. The output device 73 may include a display device such as a display screen.
Embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a method for measuring a content of a functional group of a transformer oil sample, the method comprising:
acquiring an infrared absorption spectrum of a functional group of the transformer oil sample and a background infrared absorption spectrum of the functional group of the transformer oil-free sample;
determining absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum;
determining the wavelength of infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum;
and determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength.
Of course, the storage medium provided by the embodiments of the present invention contains computer executable instructions, and the computer executable instructions are not limited to the operations of the method described above, and may also perform related operations in a method for measuring the content of functional groups in a transformer oil sample provided by any embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for measuring the content of functional groups in a transformer oil sample is characterized by comprising the following steps:
acquiring an infrared absorption spectrum of a functional group of the transformer oil sample and a background infrared absorption spectrum of the functional group of the transformer oil-free sample;
determining absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum;
determining the wavelength of infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum;
and determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength.
2. The method for measuring the content of the functional groups in the transformer oil sample according to claim 1, wherein before determining the absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum, the method further comprises:
extracting initial absorbance of the background infrared absorption spectrum;
determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength, comprising the following steps:
and determining the content of the specific optical energy group of the transformer oil sample according to the absorbance, the initial absorbance and the wavelength.
3. The method for measuring the content of the functional groups in the transformer oil sample according to claim 2, wherein determining the absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum comprises:
determining a first absorbance corresponding to a first preset range wavelength according to the infrared absorption spectrum; wherein the first preset range wavelength satisfies: 1600cm-1≤λ≤1650cm-1；
According to the infrared absorptionDetermining a second absorbance corresponding to a second preset range wavelength in the received spectrum; wherein the second preset range wavelength satisfies: 700cm-1≤λ≤750cm-1。
4. The method for measuring the content of the functional groups in the transformer oil sample according to claim 3, wherein determining the content of the specific optical energy groups in the transformer oil sample according to the absorbance, the initial absorbance and the wavelength comprises:
determining the content of aromatic hydrocarbon radicals in the transformer oil sample according to the first absorbance, the initial absorbance and the wavelength;
and determining the content of the aliphatic hydrocarbon group in the transformer oil sample according to the second absorbance, the initial absorbance and the wavelength.
5. The method for measuring the content of the functional groups in the transformer oil sample according to claim 4, wherein the content of the aromatic hydrocarbon groups in the transformer oil sample is determined according to the first absorbance, the initial absorbance and the wavelength, and specifically comprises the following steps:
wherein A isArA first absorbance corresponding to the first preset range wavelength; l is the wavelength; a. the0Is the initial absorbance;
determining the content of the aliphatic hydrocarbon group in the transformer oil sample according to the second absorbance, the initial absorbance and the wavelength, and specifically comprising the following steps:
wherein A isRThe second absorbance corresponds to the wavelength in the second preset range; l is the wavelength; a. the0Is the initial absorbance.
6. The method for measuring the content of the functional groups in the transformer oil sample according to claim 1, wherein determining the wavelength of infrared light of the infrared absorption spectrum according to a background infrared absorption spectrum comprises:
selecting a wavelength difference in any range according to the background infrared absorption spectrum;
determining the number of interference fringes between the wavelength differences in the arbitrary range;
and determining the wavelength of the infrared light according to the wavelength difference and the number of the interference fringes.
7. The method for measuring the content of the functional groups in the transformer oil sample according to claim 6, wherein the wavelength of the infrared light is determined according to the wavelength difference and the number of the interference fringes, and specifically comprises the following steps:
l＝n/2*1/(λ1-λ2)*10
wherein n is the number of the interference fringes; the λ 1- λ 2 is the wavelength difference; l is the wavelength.
8. A transformer oil sample functional group content measuring device is characterized by comprising:
the absorption spectrum acquisition module is used for acquiring an infrared absorption spectrum of the functional group of the transformer oil sample and a background infrared absorption spectrum of the functional group of the transformer oil-free sample;
the absorbance determination module is used for determining the absorbance corresponding to the wavelength in the preset range according to the infrared absorption spectrum;
the wavelength determining module is used for determining the wavelength of infrared light of the infrared absorption spectrum according to the background infrared absorption spectrum;
and the content determination module is used for determining the content of the specific optical energy group of the transformer oil sample according to the absorbance and the wavelength.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to perform a method of measuring the content of functional groups in a transformer oil sample according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a transformer oil sample functional group content measuring method according to any one of claims 1 to 7.
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| CN105334180A (en) * | 2015-12-04 | 2016-02-17 | 国家电网公司 | Spectrometric transformer oil detector |
| CN113203699A (en) * | 2020-12-10 | 2021-08-03 | 国网上海市电力公司 | Method and device for detecting antioxidant content in transformer plant insulating oil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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