WO2022154304A1 - 변압기 수명 평가 장치 및 방법 - Google Patents
변압기 수명 평가 장치 및 방법 Download PDFInfo
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- WO2022154304A1 WO2022154304A1 PCT/KR2021/019662 KR2021019662W WO2022154304A1 WO 2022154304 A1 WO2022154304 A1 WO 2022154304A1 KR 2021019662 W KR2021019662 W KR 2021019662W WO 2022154304 A1 WO2022154304 A1 WO 2022154304A1
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- transformer
- methanol
- light
- unit
- life
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- 238000011156 evaluation Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims description 29
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 672
- 230000003287 optical effect Effects 0.000 claims abstract description 105
- 238000004364 calculation method Methods 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 14
- 238000006116 polymerization reaction Methods 0.000 claims description 117
- 238000002835 absorbance Methods 0.000 claims description 83
- 238000009826 distribution Methods 0.000 claims description 12
- 238000004458 analytical method Methods 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 110
- 230000006866 deterioration Effects 0.000 description 32
- 230000008859 change Effects 0.000 description 10
- 230000007423 decrease Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 150000004996 alkyl benzenes Chemical class 0.000 description 2
- 235000010290 biphenyl Nutrition 0.000 description 2
- 239000004305 biphenyl Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229930000044 secondary metabolite Natural products 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
Images
Classifications
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Specific substances contained in the oils or fuels
- G01N33/2841—Gas in oils, e.g. hydrogen in insulating oils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N2021/1738—Optionally different kinds of measurements; Method being valid for different kinds of measurement
- G01N2021/1742—Optionally different kinds of measurements; Method being valid for different kinds of measurement either absorption or reflection
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N2021/558—Measuring reflectivity and transmission
Definitions
- the present invention relates to a transformer life evaluation apparatus and method, and more particularly, to an oil-immersed transformer life evaluation apparatus and method.
- the lifespan of the oil-immersed transformer is related to the insulating material such as insulating oil and insulating paper, and the lifespan of the oil-immersed transformer is determined by the mechanical life of the insulating paper (cellulose). That is, as the insulating paper deteriorates, the mechanical strength of the insulating paper is reduced, and the mechanical life of the insulating paper is also reduced. This is because the cellulose fibers are weakened by chemical reactions that cut the long chains of cellulose molecules in the insulating paper.
- the lifespan of an oil-immersed transformer depends on the quality (polymerization) of the insulating paper, so the decrease in the strength of the insulating paper due to deterioration can directly or indirectly cause transformer failure. Therefore, diagnosis of the state (degree of polymerization) of insulating paper is very important.
- Polymerization diagnosis technology includes a method of directly detecting a change in a material and an indirect method of detecting a secondary change such as a change in a geometric shape due to deterioration or deformation of a material.
- the diagnosis should be made in the state of operation (live line, on-line) without stopping the operation of the facility.
- DGA Dissolved Gas Analysis
- the conventional DGA method for analyzing methane gas has a problem in that the price of the gas-in-oil sensor for detecting the gas in oil is very high, and thus economical efficiency is lowered.
- An object of the present invention is to provide a transformer life evaluation device using the optical characteristics of methanol contained in insulating oil.
- An object of the present specification is to provide a transformer life evaluation method capable of evaluating the lifespan of a transformer without directly extracting methanol through the relationship between the polymerization degree of methanol and insulating paper contained in insulating oil.
- a first storage unit for storing insulating oil used for insulation of a transformer a second storage unit for storing insulating oil not used for insulation of the transformer is provided separately from the first storage unit , a light emitting unit emitting light of a specific wavelength, a light receiving unit receiving the light emitted from the light emitting unit, connecting the light emitting unit and the light receiving unit, providing a movement path of light emitted from the light emitting unit and received by the light receiving unit, and first storage
- a first optical cable disposed to penetrate the unit, connecting the light emitting unit and the light receiving unit, providing a movement path of light emitted from the light emitting unit and received by the light receiving unit, a second optical cable arranged to pass through the second storage unit, and connecting to the light receiving unit and may include a calculation unit for receiving information on the optical characteristics of methanol from the light receiving unit.
- the light receiving unit may transmit information on optical characteristics of methanol included in the insulating oil stored in each of the first storage unit and the second storage unit to the calculating unit.
- the optical characteristic may include at least one of absorbance, reflectance, and refractive index.
- the calculation unit includes a methanol content analysis unit for calculating the methanol content in the insulating oil of the transformer based on light of a specific wavelength, a polymerization degree calculating unit for calculating the polymerization degree of insulating paper provided in the transformer based on the calculated methanol content, and the calculated It may include a life evaluation unit for evaluating the life of the transformer based on the degree of polymerization.
- the methanol content analysis unit may calculate the methanol content included in the insulating oil of the transformer based on the absorbance of methanol received from the light receiving unit.
- the specific wavelength may be a wavelength having a band in the range of 317 nm to 328 nm.
- the operation unit may compare optical characteristics of methanol stored in each of the first storage unit and the second storage unit with each other, and when the difference value of the optical characteristics exceeds a set range, it may be determined that the transformer cannot be used.
- a light emitting unit irradiating light of a specific wavelength to the insulating oil stored in the first storage unit and the second storage unit, and the light receiving unit of methanol stored in the first storage unit and the second storage unit, respectively
- the method may include transmitting information on the optical characteristics to the operation unit, and comparing the optical characteristics of the methanol stored in each of the first storage unit and the second storage unit by the operation unit with each other.
- the calculation unit may determine that the transformer cannot be used when the difference value of the respective optical characteristics exceeds a set range.
- the calculating unit calculates the content of methanol contained in the insulating oil stored in the first storage unit, and the calculating unit calculates the polymerization degree of insulating paper provided in the transformer based on the methanol content of the first storage unit It may further include the step of evaluating the life of the transformer based on the polymerization degree calculated by the calculation unit and the operation unit.
- the calculating unit evaluates the lifespan of the transformer based on the calculated degree of polymerization, if the calculated degree of polymerization is less than or equal to a set limit life point, it may be determined that the transformer cannot be used.
- An embodiment of the sensor module includes a first storage unit in which insulating oil used for insulation of a transformer is stored, a second storage unit which is provided separately from the first storage unit, and insulating oil not used for insulation of the transformer is stored, a specific A light emitting unit emitting light of a wavelength, a light receiving unit receiving light emitted from the light emitting unit, connecting the light emitting unit and the light receiving unit, providing a movement path of light emitted from the light emitting unit and received by the light receiving unit, and passing through the first storage unit It may include a first optical cable arranged so as to connect the light emitting unit and the light receiving unit, provide a movement path of light emitted from the light emitting unit and received to the light receiving unit, and a second optical cable arranged to pass through the second storage unit.
- the transformer horizontal evaluation method includes the steps of providing light of a predetermined specific wavelength to the insulating oil or receiving light of a predetermined specific wavelength, the content of methanol contained in the insulating oil of the transformer using the light of a specific wavelength and calculating a degree of polymerization through the obtained methanol content, and evaluating the lifespan of the transformer based on the calculated degree of polymerization.
- the optical characteristic includes an absorbance, a reflectance, and a refractive index.
- the step of calculating the methanol content in the insulating oil of the transformer based on the light provided in an embodiment of the present specification includes the steps of obtaining the absorbance according to the optical characteristics of the methanol based on the light provided and the obtained and calculating the content of methanol included in the insulating oil of the transformer based on the absorbance.
- the predetermined specific wavelength includes a wavelength band of the second slope section.
- Equation 1 the step of calculating the degree of polymerization through the methanol content obtained in an embodiment of the present specification is calculated through Equation 1 as follows.
- the step of evaluating the lifespan of the transformer based on the degree of polymerization calculated in an embodiment of the present specification includes determining that the transformer is unusable when the calculated degree of polymerization is less than or equal to a predetermined threshold life point.
- the limiting life point is the polymerization degree of 400.
- Transformer horizontal evaluation device includes a sensor module that provides light of a predetermined specific wavelength to the insulating oil or receives light of a predetermined specific wavelength, and the insulating oil of the transformer based on light of a specific wavelength It includes a methanol content analysis unit for obtaining the obtained methanol content, a polymerization degree calculating unit for calculating the degree of polymerization through the obtained methanol content, and a life evaluation unit for evaluating the lifespan of the transformer based on the calculated degree of polymerization.
- the optical characteristic includes an absorbance, a reflectance, and a refractive index.
- the methanol content analyzer obtains an absorbance according to the optical properties of methanol based on light of a specific wavelength, and calculates the methanol content included in the insulating oil of the transformer based on the obtained absorbance.
- a predetermined specific wavelength includes a wavelength band of a section having an absorbance greater than or equal to a specific size while having a graph distribution at regular intervals.
- a wavelength band of a section having an absorbance greater than or equal to a specific size while having a graph distribution at regular intervals is greater than or equal to 317 nm or greater than or equal to or less than 328 nm.
- the degree of polymerization calculator calculates the degree of polymerization through the following [Equation 1].
- the life evaluation unit determines that the transformer cannot be used when the calculated degree of polymerization is less than or equal to a predetermined limit life point.
- the limiting life point is the polymerization degree of 400.
- the transformer life evaluation apparatus can easily and precisely evaluate the life of a transformer without directly extracting methanol through the relation between the polymerization degree of methanol and insulating paper contained in insulating oil.
- the transformer life evaluation apparatus by comparing the optical characteristics of the methanol stored in each of the first storage unit and the second storage unit with each other, the transformer can be easily stored without calculating the polymerization degree of the methanol stored in the first storage unit. It can be determined whether the limit life of
- Transformer life evaluation method can evaluate the life of the transformer without directly extracting methanol through the relationship between the polymerization degree of methanol and insulating paper contained in insulating oil.
- the transformer life evaluation method can accurately evaluate the life of the transformer by calculating the optical characteristics of methanol through an optical sensor using a specific wavelength as a light source.
- the transformer life evaluation method can efficiently evaluate the lifespan of a transformer and reduce costs by using a low-cost optical sensor that is easy to install and operate.
- FIG. 1A is a block diagram schematically illustrating a transformer life evaluation apparatus according to an embodiment.
- FIG. 1B is a diagram schematically illustrating a sensor module provided in an apparatus for evaluating a lifespan of a transformer according to an exemplary embodiment.
- FIG. 2 is a graph showing the absorbance of methanol with respect to the entire wavelength according to an embodiment.
- FIG. 3 is an enlarged view of a graph of a specific wavelength region in the graph of FIG. 2 .
- FIG. 4 is a graph showing the change in the degree of polymerization and the methanol content of the insulating oil according to the deterioration time according to an embodiment.
- FIG. 5 is a flowchart illustrating a transformer life evaluation method according to an embodiment.
- FIG. 6 is a block diagram of a transformer life evaluation apparatus and a transformer according to an embodiment of the present specification.
- FIG. 7 is a graph showing the absorbance of methanol with respect to the entire wavelength in an embodiment of the present specification.
- FIG. 8 is an enlarged view of a graph of a specific wavelength region in the graph of FIG. 7 .
- FIG 9 is a graph showing the change in the degree of polymerization and the methanol content of the insulating oil according to the deterioration time in an embodiment of the present specification.
- FIG. 10 is a flowchart of a transformer life evaluation method according to an embodiment of the present specification.
- first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from other components, and unless otherwise stated, the first component may be the second component, of course.
- FIG. 1A is a block diagram schematically illustrating an apparatus for life evaluation of a transformer 10 according to an embodiment.
- 1B is a diagram schematically illustrating a sensor module 11 provided in an apparatus for life evaluation of a transformer 10 according to an exemplary embodiment.
- arrows indicate the direction of light.
- the transformer 10 is a device for stepping up or stepping down a voltage while transferring electrical energy between two or more circuits through an inductive electrical conductor.
- the transformer 10 may be an input transformer 10 in which a coil wound around an iron core inside the transformer 10 is insulated with insulating oil.
- the transformer 10 will be described on the assumption that it is an oil-intake transformer 10 .
- the transformer 10 includes insulating oil and insulating paper.
- the insulating oil may be accommodated in the transformer 10 , and the insulating paper may be provided in a state in which the coil is wrapped.
- the insulating oil and the insulating paper are accommodated in the transformer 10 and perform an electrical insulation function in order to prevent an electric shock accident occurring from the transformer 10 .
- the insulating paper may be, for example, cellulose insulating paper, and the insulating oil may be mineral oil, synthetic oil, poly cholrinated biphenyl (PCB), mixed oil, or alkyl benzene.
- PCB poly cholrinated biphenyl
- mixed oil or alkyl benzene.
- the present invention is not limited thereto.
- the insulation paper deteriorates as the operating years of the transformer 10 increase. Specifically, since the temperature inside the transformer 10 rises according to the operation of the transformer 10, the insulating paper is subjected to temperature stress.
- methanol which is a secondary compound, is generated in the process of being decomposed by thermal energy, and the generated methanol is dissolved in the insulating oil inside the transformer 10 . Accordingly, as the number of years of operation of the transformer 10 increases, the content of methanol in the insulating oil of the transformer 10 is accumulated and increased.
- the life evaluation apparatus may use the optical characteristics of methanol included in the insulating oil. That is, as the insulating paper deteriorates, the optical properties of methanol included in the insulating oil of the transformer 10, for example, the absorbance, reflectance, or refractive index of methanol change, the life evaluation device measures this to evaluate the life of the transformer 10.
- the life evaluation apparatus may include a sensor module 11 and an operation unit 20 connected to communicate with the sensor module 11 .
- the sensor module 11 may be provided in the transformer 10
- the calculating unit 20 may be provided in the transformer 10 , or separately provided outside the transformer 10 .
- the sensor module 11 may use, for example, an optical sensor, a chemical sensor, or an electrical sensor. However, since the optical sensor is less affected by the surrounding environment, the sensor module 11 will be described below on the premise that the optical sensor is used.
- the sensor module 11 may include a first storage unit 110 , a second storage unit 120 , a light emitting unit 130 , a light receiving unit 140 , a first optical cable 150 , and a second optical cable 160 . have.
- the first storage unit 110 may store insulating oil used for insulating the transformer 10 .
- the first storage unit 110 may refer to the entire insulating oil storage device of the transformer 10 . Since the insulating oil actually used for insulation of the transformer 10 is stored in the first storage unit 110 , the insulating oil stored in the first storage unit 110 may include methanol, which is a material generated by deterioration of the insulating paper. This is because methanol is generated from the insulating paper due to deterioration of the insulating paper and melted into the insulating oil stored in the first storage unit 110 .
- the methanol content of the insulating oil stored in the first storage unit 110 is obtained, the degree of polymerization of the insulating paper is obtained based on the content of methanol to determine the degree of deterioration of the insulating paper, and the lifespan of the transformer 10 can be evaluated based on this. have.
- the second storage unit 120 is provided separately from the first storage unit 110 , and insulating oil not used for insulation of the transformer 10 may be stored. To prevent the insulating oil stored in the second storage unit 120 from mixing with the insulating oil in the first storage unit 110 , the second storage unit 120 may be provided to be sealed in a state in which insulating oil not used for insulation is stored.
- the second storage unit 120 may be disposed in a space provided at an appropriate location inside the transformer 10 .
- the first storage unit 110 may be accommodated in the second storage unit 120 .
- the second storage unit 120 may contain insulating oil for comparison with the insulating oil stored in the first storage unit 110 . Accordingly, the second storage unit 120 may have a smaller volume compared to the first storage unit 110 and may be provided to store a small amount of insulating oil. Since the second storage unit 120 is separated from the first storage unit 110 , the insulating oil of the second storage unit 120 does not contain methanol generated from the insulating paper and stored in the first storage unit 110 .
- the sensor module 11 may include a light emitting unit 130 and a light receiving unit 140 . That is, the sensor module 11 provides light to the first storage unit 110 and the second storage unit 120 through the light emitting unit 130 and receives the light provided through the light receiving unit 140 .
- the light emitting unit 130 may emit light of a specific wavelength.
- the specific wavelength is a wavelength band in which the optical characteristics of methanol are clearly distinguished, and may be, for example, greater than or equal to 317 nm or greater than or equal to or smaller than 328 nm.
- the specific wavelength will be described in detail with reference to FIGS. 2 to 4 below.
- the light receiving unit 140 may receive the light emitted from the light emitting unit 130 .
- the light emitting unit 130 may receive the optical characteristics of the insulating oil by irradiating light of a predetermined specific wavelength to the insulating oil.
- the light receiving unit 140 may receive the optical characteristics of methanol contained in the insulating oil stored in each of the first storage unit 110 and the second storage unit 120 .
- the first optical cable 150 connects the light emitting unit 130 and the light receiving unit 140 , and provides a movement path of light emitted from the light emitting unit 130 and received by the light receiving unit 140 , It may be disposed to penetrate through the first storage unit 110 .
- Light passing through the first optical cable 150 may be irradiated to methanol contained in the insulating oil stored in the first storage unit 110 . Accordingly, the light receiving unit 140 may receive the optical characteristics of methanol of the first storage unit 110 through the first optical cable 150 .
- the second optical cable 160 connects the light emitting unit 130 and the light receiving unit 140 , and provides a movement path of light emitted from the light emitting unit 130 and received by the light receiving unit 140 , 2 It may be disposed to pass through the storage unit 120 .
- Light passing through the second optical cable 160 may be irradiated to the insulating oil stored in the second storage unit 120 . Since methanol does not flow into the second storage unit 120 from the insulating paper, the light receiving unit 140 may receive the optical characteristics of insulating oil that does not contain methanol through the second optical cable 160 .
- the optical properties of methanol may include the optical properties of insulating oil in a state in which methanol is not included.
- the Methanol has different optical properties depending on the wavelength band of light.
- the optical characteristic may include at least one of absorbance, reflectance, and refractive index.
- the absorbance is the degree to which methanol absorbs light
- the reflectance is the degree to which methanol reflects light
- the refractive index is the degree to which light is bent at the interface when light passes through the methanol.
- the optical properties of methanol that is, absorbance, reflectance, and refractive index, all have similar properties.
- the calculating unit 20 is connected to the light receiving unit 140 , and may receive information on the optical characteristics of methanol from the light receiving unit 140 .
- the light receiving unit 140 may transmit information on the optical characteristics of methanol contained in the insulating oil stored in each of the first storage unit 110 and the second storage unit 120 to the operation unit 20 .
- the calculation unit 20 may include a methanol content analysis unit 21 , a polymerization degree calculation unit 22 , and a lifespan evaluation unit 23 .
- the methanol content analyzer 21 may calculate the methanol content included in the insulating oil of the transformer 10 based on light of a specific wavelength.
- the methanol content analysis unit 21 may calculate the methanol content included in the insulating oil of the transformer 10 based on the absorbance of methanol received from the light receiving unit 140 .
- the methanol content analyzer 21 acquires an absorbance according to the optical characteristic of methanol based on the light provided by the sensor module 11, and methanol contained in the insulating oil of the transformer 10 based on the obtained absorbance content can be calculated.
- Absorbance means the log value of the ratio of the emitted radiation to the transmitted radiation when light is irradiated on methanol.
- the absorbance indicates the degree to which methanol absorbs light of a specific wavelength and is proportional to the absorbance, which is the optical characteristic of methanol. Therefore, as the amount of light absorbed by methanol increases, the absorbance increases, and as the amount of light absorbed by methanol decreases, the absorbance decreases.
- the methanol content analyzer 21 calculates the methanol content included in the insulating oil of the transformer 10 based on the obtained absorbance.
- the degree of polymerization calculator 22 may calculate the degree of polymerization of insulating paper provided in the transformer 10 based on the calculated methanol content.
- the degree of polymerization refers to the quality of the insulating paper, that is, to what extent the degree of deterioration of the insulating paper has progressed. Therefore, as deterioration progresses, the degree of polymerization is lowered, and the mechanical life of the insulating paper is reduced.
- a method of calculating the degree of polymerization will be specifically described below.
- the life evaluation unit 23 may evaluate the lifetime of the transformer 10 based on the calculated degree of polymerization. Specifically, the life evaluation unit 23 may preset a limit life point of the transformer 10 .
- the critical life point may be, for example, when the calculated degree of polymerization is 400. The critical life point is described in detail below.
- the life evaluation unit 23 may compare the calculated degree of polymerization with a preset limit life point, and if the calculated degree of polymerization is less than or equal to a preset limit life point, it may be determined that the transformer 10 is unusable.
- the life evaluation unit 23 compares the calculated degree of polymerization and a preset limit life point, and when the calculated degree of polymerization is greater than the preset limit life point, the transformer 10 according to the difference between the limit life point and the calculated polymerization degree. ) can be evaluated.
- the operation unit 20 compares the optical characteristics of the methanol stored in each of the first storage unit 110 and the second storage unit 120 with each other, and when the difference value of the optical characteristics exceeds a set range, the transformer (10) can be judged to be unusable.
- the calculating unit 20 receives the second optical characteristic, that is, the second optical characteristic, of the insulating oil that does not contain methanol in the second storage unit 120 . (140) can be received. Also, the operation unit 20 may receive the optical characteristic of methanol stored in the first storage unit 110 , that is, the second optical characteristic, from the light receiving unit 140 .
- the insulating paper deteriorates and the first optical characteristic may change.
- the second optical characteristic does not change or changes very little.
- the calculating unit 20 may compare the first optical characteristic and the second optical characteristic, and if the difference value exceeds a set range, it may be determined that the transformer 10 cannot be used.
- the set range for the difference value between the first optical characteristic and the second optical characteristic may be appropriately selected based on the limit lifetime point.
- the difference between the absorbance, reflectance, or refractive index of the insulating oil at the critical life point and the absorbance, reflectance, or refractive index of the insulating oil not yet used for insulation may be set as the set value.
- the set value may be determined based on a threshold life point already derived from a transformer 10 other than the current transformer 10 .
- the calculating unit 20 determines that the current transformer 10 is not usable.
- FIG. 2 is a graph showing the absorbance of methanol with respect to the entire wavelength according to an embodiment.
- FIG. 3 is an enlarged view of a graph of a specific wavelength region in the graph of FIG. 2 .
- the horizontal axis indicates the wavelength (nm) 200 of light and the vertical axis indicates the absorbance 210 .
- the wavelength 200 of light is divided into different regions according to the length. Different regions of light may be divided into, for example, gamma rays, X-rays, ultraviolet rays (100 nm to 380 nm), visible rays (380 nm to 780 nm), infrared rays (780 nm to 1000 nm), ultrasonic waves, radio waves, etc., and each region have different characteristics.
- the content of methanol may be measured in the first section 240 , the second section 242 , and the third section 244 in which no noise is generated and a slope exists.
- the absorbance is lower, it is difficult to distinguish noise when measuring the content of methanol, so a precise technique is required, and thus a lot of cost is required.
- the absorbance of the first section 240 is greater than that of the second section 242 and the third section 244 , it is advantageous to measure the methanol content. That is, the first section 240 has a high absorbance of 2 or more as a wavelength in the ultraviolet region, while the second section 242 and the third section 244 have a low absorbance of 1 or less as a wavelength other than the ultraviolet region. Therefore, when the methanol content analyzer 21 calculates the methanol content in the first section 240 , the measurement cost can be reduced and economic efficiency can be improved.
- the sensor module 11 may irradiate light of a predetermined specific wavelength to the insulating oil. Specifically, referring to FIG. 3 in which the first section 240 is enlarged, the graph of the curve varies according to the content of methanol included in the insulating oil.
- graph E means a graph of pure insulating oil in which methanol does not exist (deterioration of insulating paper has not progressed)
- graphs A to D are graphs of insulating oil containing methanol (deterioration of insulating paper has progressed).
- graph D may represent a methanol content of 3.35 ppm, graph C 4.4 ppm, graph B 32.7 ppm, and graph A of 135 ppm methanol, respectively.
- first section 240 may be divided into a first slope section 331 , a second slope section 332 , and a third slope section 333 . Since each of the first inclined section 331 , the second inclined section 332 , and the third inclined section 333 has different inclinations, sections may be divided according to the inclination angles.
- the distributions of graphs A to E are not evenly arranged, and since there is a graph deviating from the graph E, noise occurs. Therefore, it is difficult to calculate the methanol content according to the absorbance and accurately evaluate the lifespan of the transformer 10 .
- the third slope section 333 not only has a graph distribution with irregular intervals, but also has an absorbance of 2 or less. Therefore, it is difficult to accurately measure the methanol content.
- the second slope section 332 has an absorbance of 2 or more while having a graph distribution at regular intervals. Accordingly, in the second slope section 332 , the methanol content according to the difference in absorbance may be precisely calculated.
- the wavelength band of the second slope section 332 may be 317 nm to 328 nm. Accordingly, a specific wavelength of light emitted from the light emitting unit 130 of the sensor module 11 may be a wavelength having a band in the range of 317 nm to 328 nm.
- the second slope section 332 is not limited thereto, and may include all of a specific wavelength region having a characteristic of having two or more absorbances while having a graph distribution at regular intervals.
- the methanol content analyzer 21 may calculate the methanol content by analyzing the absorbance of the second inclined section 332 .
- FIG. 4 is a graph showing the change in the degree of polymerization and the methanol content of the insulating oil according to the deterioration time according to an embodiment.
- the horizontal axis represents the deterioration time (h) 400
- the vertical axis represents the polymerization degree 410
- the circles indicated in the drawing represent the methanol content included in the insulating oil.
- the diameter 432 of the circle when the deterioration time is 3500h is larger than the diameter 430 of the circle when the deterioration time is 1000h. That is, the methanol content included in the insulating oil is proportional to the deterioration time (400).
- the degree of polymerization calculator 22 may calculate the degree of polymerization 410 from the methanol content through the following [Equation 1].
- the first reference value may be any value between 56.55, which is the lower limit of the first reference value, and 73.5, which is the upper limit of the first reference value
- the second reference value is any value between 8.5, the lower limit of the second reference value, and 11.15, the upper limit of the second reference value.
- the degree of polymerization when the diameter of the circle is large ( 432 ) is 650 to 700 , which is greater than the degree of polymerization when the diameter of the circle is small ( 430 ) is 400 to 500 . That is, the higher the methanol content, the lower the polymerization degree.
- the life evaluation unit 23 may evaluate the life of the insulating paper, that is, the life of the transformer 10 through the calculated degree of polymerization.
- the life evaluation unit 23 may set a limit life point in advance.
- the threshold life point may be, for example, a polymerization degree of 400 that the transformer 10 determines to be unusable at a minimum degree of polymerization ( 420 ). Accordingly, the life evaluation unit 23 may evaluate the lifespan of the transformer 10 based on the degree of polymerization of 400, and if the calculated degree of polymerization is 400 or less, the life of the transformer 10 has expired and it can be evaluated that it can no longer be used.
- FIG. 5 is a flowchart illustrating a method for evaluating the life of the transformer 10 according to an embodiment.
- the transformer 10 life evaluation method according to the embodiment may be performed using the above-described transformer 10 life evaluation apparatus.
- the light emitting unit 130 may irradiate light of a specific wavelength to the insulating oil stored in the first storage unit 110 and the second storage unit 120 (S510). The light irradiated from the light emitting unit 130 may pass through the first storage unit 110 and the second storage unit 120 .
- the light receiving unit 140 may receive optical characteristics of methanol stored in each of the first storage unit 110 and the second storage unit 120 .
- the light receiving unit 140 may transmit information on the optical characteristics of methanol stored in each of the first storage unit 110 and the second storage unit 120 to the operation unit 20 (S520).
- the operation unit 20 may compare the optical characteristics of the methanol stored in each of the first storage unit 110 and the second storage unit 120 with each other ( S530 ). In step S530 , the operation unit 20 may determine that the transformer 10 is not usable when the difference value of each of the optical characteristics exceeds a set range.
- the calculating unit 20 may calculate the content of methanol included in the insulating oil stored in the first storage unit 110 (S540).
- the calculating unit 20 may calculate the polymerization degree of the insulating paper provided in the transformer 10 based on the methanol content of the first storage unit 110 (S550).
- the lifespan of the transformer 10 may be evaluated based on the degree of polymerization calculated by the calculator 20 ( S560 ).
- step S560 when the calculated degree of polymerization is less than or equal to a set limit life point, the calculating unit 20 may determine that the transformer 10 is unavailable.
- the set limit life point may be, for example, a case in which the calculated degree of polymerization is 400, as described above.
- FIG. 6 is a block diagram of a transformer life evaluation apparatus and a transformer according to an embodiment of the present specification.
- the transformer 1600 is a device that increases or decreases a voltage while transferring electrical energy between two or more circuits through an inductive electrical conductor.
- the transformer 1600 may be an input transformer in which a coil wound around an iron core inside the transformer is insulated with insulating oil.
- the transformer 1600 will be described on the assumption that it is an input transformer.
- the transformer 1600 includes an insulating oil 1620 and an insulating paper 1640 .
- the insulating oil 1620 and the insulating paper 1640 are accommodated in the transformer 1600 and perform an electrical insulation function to prevent an electric shock accident occurring from the transformer 1600 .
- the insulating paper 1640 may be, for example, cellulose insulating paper, and the insulating oil 1620 may be mineral oil, synthetic oil, poly cholrinated biphenyl (PCB), mixed oil, or alkylbenzene.
- PCB poly cholrinated biphenyl
- mixed oil or alkylbenzene
- the insulating paper 1640 deteriorates as the operating years of the transformer 1600 increase. Specifically, since the temperature inside the transformer rises according to the operation of the transformer 1600, the insulating paper 1620 is subjected to temperature stress. When the insulating paper 1620 is subjected to temperature stress, methanol, which is a secondary compound, is generated in the process of being decomposed by thermal energy, and the generated methanol is dissolved in the insulating oil 1620 inside the transformer. Accordingly, as the number of years of operation of the transformer 1600 increases, the content of methanol is accumulated in the insulating oil 1620 of the transformer 1600 and increases.
- the transformer life evaluation apparatus 1000 is an apparatus for evaluating the lifespan of a transformer, and includes a sensor module 1100, a methanol content analysis unit 1200, a polymerization degree calculation unit 1300, and a life evaluation unit ( 1400) may be included.
- the sensor module 1100 includes a light emitting unit and a light receiving (photometric) unit. That is, the sensor module 1100 directly provides light to the insulating oil 1620 through the light emitting unit or receives light provided from a separate light emitting device inside the transformer through a light receiving (photometric) unit.
- the sensor module 1100 may be, for example, an optical sensor, a chemical sensor, or an electrical sensor. However, since the optical sensor is less affected by the surrounding environment, hereinafter, the sensor module 1100 will be described on the assumption that it is an optical sensor.
- the sensor module 1100 is shown inside the transformer life evaluation device 1000, but specifically, the sensor module 1100 is disposed inside the transformer to provide light to the insulating oil 1620 or provided from a separate light emitting device. can receive light.
- the optical characteristic means absorbance, reflectance, or refractive index.
- the absorbance is the degree to which methanol absorbs light
- the reflectance is the degree to which methanol reflects light
- the refractive index is the degree to which light is bent at the interface when light passes through the methanol.
- the optical properties of methanol that is, absorbance, reflectance, and refractive index, all have similar properties.
- the sensor module 1100 may provide light of a predetermined specific wavelength to the insulating oil or may receive light of a predetermined specific wavelength. That is, the sensor module 1100 may generate and emit light of a predetermined specific wavelength through the light emitting unit or absorb light of a predetermined specific wavelength from light generated by a separate light emitting device through the light receiving (photometric) unit.
- the predetermined specific wavelength is a wavelength band in which the optical properties of methanol are clearly distinguished, and may be, for example, greater than or equal to 317 nm and less than or equal to 328 nm.
- a specific predetermined wavelength band will be described later in detail.
- the methanol content analyzer 1200 calculates the content of methanol included in the insulating oil 1620 of the transformer 1600 based on the provided light. Specifically, the methanol content analysis unit 1200 obtains an absorbance according to the optical characteristics of methanol based on the light provided by the sensor module 1100, and calculates the methanol content included in the insulating oil of the transformer based on the obtained absorbance. .
- Absorbance means the log value of the ratio of the emitted radiation to the transmitted radiation when light is irradiated on methanol.
- the absorbance indicates the degree to which methanol absorbs light of a specific wavelength and is proportional to the absorbance, which is the optical characteristic of methanol. Therefore, as the amount of light absorbed by methanol increases, the absorbance increases, and as the amount of light absorbed by methanol decreases, the absorbance decreases.
- the methanol content analysis unit 1200 calculates the methanol content included in the insulating oil of the transformer based on the obtained absorbance.
- the degree of polymerization calculation unit 1300 calculates the degree of polymerization through the obtained methanol content.
- the degree of polymerization refers to the health of the insulating paper 1640 , that is, to what extent the degree of deterioration of the insulating paper 1640 has progressed. Accordingly, as deterioration progresses, the degree of polymerization is lowered, and the mechanical life of the insulating paper 1640 is reduced.
- the degree of polymerization may be calculated through [Equation 1] regarding the methanol content and the degree of polymerization of the insulating paper 1640 below.
- the first reference value may be any value between 56.55, which is the lower limit of the first reference value, and 73.5, which is the upper limit of the first reference value
- the second reference value is any value between 8.5, the lower limit of the second reference value, and 11.15, the upper limit of the second reference value.
- the life evaluation unit 1400 evaluates the lifespan of the transformer 1600 based on the calculated degree of polymerization. Specifically, the life evaluation unit 1400 may preset a limit life point of the transformer 1600 .
- the threshold life point may be 400, for example.
- the life evaluation unit 1400 may compare the calculated degree of polymerization with a preset limit life point, and when the calculated degree of polymerization is less than or equal to a preset limit life point, it may be determined that the transformer 1600 is not usable.
- the life evaluation unit 1400 compares the calculated degree of polymerization with a preset limit life point, and when the calculated degree of polymerization is greater than the preset limit life point, the remaining life of the transformer according to the difference between the limit life point and the calculated polymerization degree lifespan can be assessed.
- FIG. 7 is a graph showing the absorbance of insulating oil including methanol with respect to all wavelengths in an embodiment of the present specification
- FIG. 8 is an enlarged view of a graph of a specific wavelength region in the graph of FIG. 7 .
- a graph will be described with reference to FIGS. 7 and 8 .
- the horizontal axis indicates the wavelength (nm) of light (2000) and the vertical axis indicates the absorbance (2100).
- the wavelength 2000 of light is divided into different regions according to the length. Different regions of light may be divided into, for example, gamma rays, X-rays, ultraviolet rays (100 nm to 380 nm), visible rays (380 nm to 780 nm), infrared rays (780 nm to 1000 nm), ultrasonic waves, radio waves, etc., and each region have different characteristics.
- the content of methanol may be measured in the first section 2400 , the second section 2420 , and the third section 2440 in which no noise is generated and a slope exists.
- the absorbance is lower, it is difficult to distinguish noise when measuring the content of methanol, so a precise technique is required, and thus a lot of cost is required.
- the first section 2400 has higher absorbance than the second section 2420 and the third section 2440 , so it is advantageous to measure the methanol content. That is, the first section 2400 has a high absorbance of 2 or more as a wavelength in the ultraviolet region, while the second section 2420 and the third section 2440 have a low absorbance of 1 or less as a wavelength other than the ultraviolet region. Therefore, when the methanol content analyzer 1200 calculates the methanol content in the first section 2400 , the measurement cost can be reduced and economic efficiency can be improved.
- the sensor module 1100 may provide light of a predetermined specific wavelength to the insulating oil.
- the graph of the curve varies according to the content of methanol included in the insulating oil. That is, graph E means a graph of pure insulating oil 1620 in which methanol does not exist (deterioration of insulating paper has not progressed), and graphs A to D are graphs of insulating oil containing methanol (deterioration of insulating paper has progressed) to be.
- graph D may represent a methanol content of 3.35 ppm, graph C 4.4 ppm, graph B 32.7 ppm, and graph A of 135 ppm methanol, respectively.
- the first section 2400 may be divided into a first slope section 3310 , a second slope section 3320 , and a third slope section 3330 .
- first inclined section 3310 since each of the first inclined section 3310 , the second inclined section 3320 , and the third inclined section 3330 has different inclinations, sections may be divided according to the inclination angles.
- the distributions of graphs A to E are not evenly arranged, and since there is a graph deviating from the graph E, noise occurs. Therefore, it is difficult to calculate the methanol content according to the absorbance and accurately evaluate the lifespan of the transformer.
- the third slope section 3330 not only has a graph distribution with irregular intervals, but also has an absorbance of 2 or less. Therefore, it is difficult to accurately measure the methanol content.
- the second slope section 3320 has a graph distribution at regular intervals and has an absorbance of 2 or more. Accordingly, in the second slope section 3320 , the methanol content according to the difference in absorbance may be precisely calculated.
- the wavelength band of the second slope section 3320 may be 317 nm to 328 nm. Accordingly, in an embodiment of the present specification, the predetermined specific wavelength of the sensor module 1100 may be greater than or equal to 317 nm and less than or equal to 328 nm.
- the second slope section 3320 is not limited thereto, and may include all of a specific wavelength region having a characteristic of having two or more absorbances while having a graph distribution at regular intervals.
- the methanol content analyzer 1200 may calculate the methanol content by analyzing the absorbance of the second slope section 3320 .
- FIG 9 is a graph showing the change in the degree of polymerization and the methanol content of the insulating oil according to the deterioration time in an embodiment of the present specification.
- the horizontal axis indicates the deterioration time (h) (4000)
- the vertical axis indicates the degree of polymerization (4100)
- the circle indicated in the diagram indicates the methanol content included in the insulating oil.
- the deterioration time 4000 increases, the methanol content of the insulating oil 1620 according to the deterioration in the insulating paper 1640 increases, so that the diameter of the circle increases.
- the diameter 4320 of the circle when the deterioration time is 3500h is greater than the diameter 430 of the circle when the deterioration time is 1000h. That is, the methanol content included in the insulating oil is proportional to the deterioration time (4000).
- the degree of polymerization calculator 1300 may calculate the degree of polymerization 4100 from the methanol content through the following [Equation 1].
- the first reference value may be any value between 56.55, which is the lower limit of the first reference value, and 73.5, which is the upper limit of the first reference value
- the second reference value is any value between 8.5, the lower limit of the second reference value, and 11.15, the upper limit of the second reference value.
- the degree of polymerization when the diameter of the circle is large (4320) is 650 to 700, which is greater than the degree of polymerization when the diameter of the circle is small (430) is 400 to 500. That is, the higher the methanol content, the lower the polymerization degree.
- the life evaluation unit 150 may evaluate the life of the insulating paper, that is, the life of the transformer through the calculated degree of polymerization.
- the life evaluation unit 150 may preset a limit life point.
- the threshold life point may be, for example, a degree of polymerization 400 at a minimum degree of polymerization that the transformer determines to be unusable (4200). Accordingly, the life evaluation unit 150 may evaluate the lifespan of the transformer based on the degree of polymerization of 400, and if the calculated degree of polymerization is 400 or less, the life of the transformer is over and it can be evaluated that it can no longer be used.
- FIG. 10 is a flowchart of a transformer life evaluation method according to an embodiment of the present specification.
- the transformer life evaluation apparatus 1000 provides light of a predetermined specific wavelength to the insulating oil or receives light of a predetermined specific wavelength (S5000).
- Methanol contained in insulating oil has optical properties including absorbance, reflectance, and refractive index, and the optical properties of methanol vary depending on the content of methanol.
- the transformer life evaluation apparatus 1000 calculates the methanol content included in the insulating oil of the transformer based on the light provided (S5100). Specifically, the transformer life evaluation apparatus 1000 acquires an absorbance according to the optical characteristic of methanol based on the provided light, and acquires the methanol content included in the insulating oil of the transformer based on the obtained absorbance.
- the transformer life evaluation apparatus 1000 calculates the polymerization degree through the obtained methanol content (S5200). Specifically, the degree of polymerization can be calculated through [Equation 1] with the methanol content as described above.
- the transformer life evaluation apparatus 1000 evaluates the life of the transformer based on the calculated degree of polymerization ( S5300 ).
- the transformer life evaluation apparatus 1000 may set a limit life point in advance, and when the calculated degree of polymerization is less than or equal to a preset limit life point, it may determine that the transformer is unusable.
- the critical life point may be, for example, a degree of polymerization of 400.
- the transformer life evaluation method can evaluate the lifespan of the transformer without directly extracting methanol through Equation 1 between the polymerization degree of methanol and insulating paper contained in insulating oil.
- the transformer life evaluation method can accurately evaluate the life of the transformer by calculating the optical characteristics of methanol through an optical sensor using a specific wavelength as a light source.
- the method for evaluating the life of a transformer can efficiently evaluate the life of a transformer and reduce costs by using an optical sensor that is inexpensive and easy to install and operate.
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Abstract
Description
Claims (20)
- 절연유에 포함된 메탄올의 광특성을 이용한 변압기 수명 평가 장치에 있어서,상기 변압기의 절연에 사용되는 절연유가 저장되는 제1저장부;상기 제1저장부와 분리되어 구비되고, 상기 변압기의 절연에 사용되지 않는 절연유가 저장되는 제2저장부;특정 파장의 빛을 발광하는 발광부;상기 발광부에서 발광된 빛을 수광하는 수광부;상기 발광부와 상기 수광부를 연결하고, 상기 발광부로부터 발광되어 상기 수광부로 수광되는 빛의 이동경로를 제공하고, 상기 제1저장부를 관통하도록 배치되는 제1광케이블;상기 발광부와 상기 수광부를 연결하고, 상기 발광부로부터 발광되어 상기 수광부로 수광되는 빛의 이동경로를 제공하고, 상기 제2저장부를 관통하도록 배치되는 제2광케이블; 및상기 수광부와 연결되고, 상기 수광부로부터 메탄올의 광특성에 대한 정보를 수신하는 연산부를 포함하는,변압기 수명 평가 장치.
- 제1항에 있어서,상기 수광부는,상기 제1저장부와 상기 제2저장부 각각에 저장된 절연유에 포함되는 메탄올의 광특성에 대한 정보를 상기 연산부로 전송하는,변압기 수명 평가 장치.
- 제2항에 있어서,상기 광특성은 흡광율, 반사율 또는 굴절률 중 적어도 하나를 포함하는,변압기 수명 평가 장치.
- 제1항에 있어서,상기 연산부는,특정 파장의 빛에 기초하여 상기 변압기의 절연유에 포함된 메탄올 함량을 산출하는 메탄올 함량 분석부;산출된 메탄올 함량을 기초로 상기 변압기에 구비되는 절연지의 중합도를 산출하는 중합도 산출부; 및산출된 중합도에 기초하여 변압기의 수명을 평가하는 수명 평가부를 포함하는,변압기 수명 평가 장치.
- 제4항에 있어서,상기 메탄올 함량 분석부는,상기 수광부로부터 전송받은 메탄올의 흡광도를 기초로 변압기의 절연유에 포함된 메탄올 함량을 산출하는,변압기 수명 평가 장치.
- 제1항에 있어서,상기 특정 파장은,317nm 내지 328nm 범위의 대역을 가지는 파장인,변압기 수명 평가 장치.
- 제3항에 있어서,상기 연산부는,상기 제1저장부와 상기 제2저장부 각각에 저장된 메탄올의 상기 광특성을 서로 비교하고, 각각의 상기 광특성의 차이값이 설정된 범위를 초과하면 변압기가 사용 불가능한 것으로 판단하는,변압기 수명 평가 장치.
- 제1항에 기재된 변압기 수명 평가 장치를 이용한 변압기 수명 평가 방법에 있어서,상기 발광부가 상기 제1저장부와 상기 제2저장부에 저장된 절연유에 특정 파장의 빛을 조사하는 단계;상기 수광부가 상기 제1저장부와 상기 제2저장부 각각에 저장된 메탄올의 광특성에 대한 정보를 상기 연산부로 전송하는 단계; 및상기 연산부가 상기 제1저장부와 상기 제2저장부 각각에 저장된 메탄올의 상기 광특성을 서로 비교하는 단계;를 포함하는,변압기 수명 평가 방법.
- 제8항에 있어서,상기 연산부가 상기 제1저장부와 상기 제2저장부 각각에 저장된 메탄올의 상기 광특성을 서로 비교하는 경우,상기 연산부는 각각의 상기 광특성의 차이값이 설정된 범위를 초과하면 변압기가 사용 불가능한 것으로 판단하는,변압기 수명 평가 방법.
- 제8항에 있어서,상기 연산부가 상기 제1저장부에 저장된 절연유에 포함된 메탄올의 함량을 산출하는 단계;상기 연산부가 상기 제1저장부의 메탄올 함량에 기초하여 상기 변압기에 구비되는 절연지의 중합도를 산출하는 단계; 및상기 연산부가 산출된 중합도에 기초하여 상기 변압기의 수명을 평가하는 단계를 더 포함하는,변압기 수명 평가 방법.
- 제10항에 있어서,상기 연산부가 산출된 중합도에 기초하여 상기 변압기의 수명을 평가하는 경우,상기 산출된 중합도가 설정된 한계 수명점 이하인 경우, 상기 변압기가 사용 불가능한 것으로 판단하는,변압기 수명 평가 방법.
- 절연유에 포함된 메탄올의 광특성을 이용한 변압기 수명 평가 방법에 있어서,미리 정해진 특정 파장의 빛을 상기 절연유에 제공하거나 미리 정해진 특정 파장의 빛을 수신하는 단계;상기 특정 파장의 빛을 이용하여 상기 변압기의 절연유에 포함된 메탄올 함량을 획득하는 단계;상기 획득된 메탄올 함량을 통해 중합도를 산출하는 단계; 및상기 산출된 중합도에 기초하여 상기 변압기의 수명을 평가하는 단계를 포함하는변압기 수명 평가 방법.
- 제12항에 있어서,상기 광특성은흡광율, 반사율, 굴절률을 포함하는변압기 수명 평가 방법.
- 제12항에 있어서,상기 특정 파장의 빛에 기초하여 상기 변압기의 절연유에 포함된 메탄올 함량을 산출하는 단계는상기 특정 파장의 빛에 기초하여 상기 메탄올의 광특성에 따른 흡광도를 획득하는 단계; 및상기 획득한 흡광도에 기초하여 상기 변압기의 절연유에 포함된 메탄올 함량을 산출하는 단계를 포함하는변압기 수명 평가 방법.
- 제12항에 있어서,상기 미리 정해진 특정 파장은일정한 간격의 그래프 분포를 가지면서 특정 크기 이상의 흡광도를 갖는 구간의 파장 대역을 포함하는변압기 수명 평가 방법.
- 제15항에 있어서,상기 일정한 간격의 그래프 분포를 가지면서 특정 크기 이상의 흡광도를 갖는 구간의 파장 대역은317nm 보다 같거나 크고 328nm 보다 같거나 작은변압기 수명 평가 방법.
- 제17항에 있어서,상기 제1 기준값은 제1 기준값의 하한값인 56.55와 제1 기준값의 상한값인 73.5 사이의 임의의 값이고,상기 제2 기준값은 제2 기준값의 하한값인 8.5와 제2 기준값의 상한값인 11.15 사이의 임의의 값인변압기 수명 평가 방법.
- 제12항에 있어서,상기 산출된 중합도에 기초하여 상기 변압기의 수명을 평가하는 단계는상기 산출된 중합도가 미리 정해진 한계 수명점 이하인 경우 상기 변압기가 사용 불가능한 것으로 판단하는 단계를 포함하는변압기 수명 평가 방법.
- 제19항에 있어서,상기 한계 수명점은상기 중합도가 400 인변압기 수명 평가 방법.
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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KR101681561B1 (ko) * | 2015-05-22 | 2016-12-01 | 한국광기술원 | 변압기 절연유의 온도 및 가스 검출 장치 |
JP2018165648A (ja) * | 2017-03-28 | 2018-10-25 | 株式会社日立製作所 | 変圧器の絶縁油劣化診断システム及び方法 |
JP6419406B1 (ja) * | 2018-04-25 | 2018-11-07 | 三菱電機株式会社 | 油入電気機器の診断方法 |
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KR101291213B1 (ko) * | 2012-05-21 | 2013-07-31 | 한국 전기안전공사 | 파장변환 레이저를 이용한 절연유 분석시스템 및 그 방법 |
KR101681561B1 (ko) * | 2015-05-22 | 2016-12-01 | 한국광기술원 | 변압기 절연유의 온도 및 가스 검출 장치 |
JP2018165648A (ja) * | 2017-03-28 | 2018-10-25 | 株式会社日立製作所 | 変圧器の絶縁油劣化診断システム及び方法 |
JP6419406B1 (ja) * | 2018-04-25 | 2018-11-07 | 三菱電機株式会社 | 油入電気機器の診断方法 |
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