CN214895626U - Fluorescent online detection device for transformer insulating oil - Google Patents
Fluorescent online detection device for transformer insulating oil Download PDFInfo
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- CN214895626U CN214895626U CN202121017399.6U CN202121017399U CN214895626U CN 214895626 U CN214895626 U CN 214895626U CN 202121017399 U CN202121017399 U CN 202121017399U CN 214895626 U CN214895626 U CN 214895626U
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Abstract
A fluorescent online detection device for transformer insulating oil belongs to the technical field of transformer fault diagnosis, and how to acquire fluorescent signals of the transformer insulating oil under different discharge capacities in real time on line to realize transformer fault diagnosis and analysis; the embedded signal processing board sends out an instruction to control the light-emitting device to emit laser, the laser irradiates on the optical window sheet through the incident optical fiber and then irradiates on the transformer insulating oil in the oil detection chamber, and therefore the transformer insulating oil generates a fluorescent signal; the fluorescent signal is transmitted to an RGB (red, green and blue) three-color detector through an emergent optical fiber, and the RGB three-color detector converts the collected fluorescent signal into an electric signal and transmits the electric signal to an embedded signal processing board for data processing; the utility model discloses a device can acquire insulating oily fluorescence signal in real time on line, according to fluorescence signal diagnosis transformer state, possesses the advantage of high detectivity and contactless sampling in the time of nondestructive test, and equipment cost is lower, can promote transformer failure diagnosis practical application effect.
Description
Technical Field
The utility model belongs to the technical field of transformer fault diagnosis, a transformer insulating oil fluorescence on-line measuring device is related to.
Background
The transformer insulating oil is a kind of insulating oil used in oil-filled electrical equipment such as transformers, reactors, mutual inductors, bushings, oil switches and the like, and has the functions of insulation, cooling and arc extinction.
Transformer insulating oil is a fractionated product of petroleum and its main components are alkanes, naphthenic saturated hydrocarbons, aromatic unsaturated hydrocarbons and non-hydrocarbon compounds. The transformer insulating oil can emit fluorescence under the irradiation of ultraviolet rays or X rays.
Fluorescence refers to a cold luminescence phenomenon of photoluminescence. When a certain normal temperature substance is irradiated by incident light (generally ultraviolet rays or X rays) with a certain wavelength, the substance enters an excited state after absorbing light energy, and immediately excites and emits emergent light (generally the wavelength is in a visible light waveband) which is longer than the wavelength of the incident light; and the light emission phenomenon disappears immediately upon stopping the incident light. The emerging light having this property is called fluorescence.
At present, an oil-immersed transformer is generally adopted in a power grid with the voltage level of 35kV or above, the transformer is used as a core of energy conversion in the process of electric energy production and distribution, and the running state of the transformer directly influences the safe and reliable running of a power system, so that the monitoring of the running state of the transformer is particularly important.
In the prior art, monitoring of the operation state of the transformer mainly includes methods such as a partial discharge test, Analysis of Dissolved Gas (DGA) in oil, a physicochemical test of insulating oil, and the like.
The insulating oil physical and chemical test generally comprises methods such as acid value, chromatographic analysis, volume resistivity and the like of the transformer oil, and has the advantages of accurate measurement of physical and chemical parameters of the insulating oil and high state monitoring precision. But the defects are that the oil sample needs to be sampled and consumed, the measuring time is long, and the real-time online monitoring requirement cannot be met.
As shown in fig. 3, a document "development of a fluorescent optical fiber sensing system for detecting partial discharge of a transformer" (a key laboratory in national security and new technology of power transmission and distribution equipment and system safety of Chongqing university, Tang torch, etc.) with publication date of 2011, 5 and 31 discloses a test platform for detecting partial discharge of a transformer, but the partial discharge test has the following disadvantages: 1) the local discharge can cause the overheating condition of the electrical equipment, thereby causing damage to the electrical equipment; 2) partial discharge can generate a series of adverse phenomena and reactions, such as chemical reactions, electric pulses, electromagnetic radiation, etc., which can cause serious harm to the surrounding environment and the life health of people; 3) partial discharge easily causes the insulation layer of the transformer to be broken down, thereby greatly reducing the insulation performance of the transformer and finally causing accidents.
The analysis (DGA) of dissolved gas in oil has the advantages of no influence of various electromagnetic interferences, high reliability of obtained data, relatively mature technology and the like, but the DGA has the defects of the following conditions: 1) the main transformer generates discharge without generating gas or releases little gas, and the DGA can not be detected or can not detect gas with low concentration; 2) the main transformer has a discharge fault, the discharge quantity in a short time is continuously increased, a large amount of gas is rapidly released, single analysis time of the current DGA analysis means needs several hours, real-time and on-line monitoring cannot be achieved, and the problem of monitoring delay exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to how to design a transformer insulating oil fluorescence on-line measuring device, real-time on-line collection transformer insulating oil realizes transformer fault diagnosis analysis at the fluorescence signal under the different discharge capacities.
A fluorescent online detection device for transformer insulating oil comprises an embedded signal processing board (1), an RGB (red, green and blue) three-color detector (2), a light-emitting device (3), an incident optical fiber (6), an emergent optical fiber (7), an optical window sheet (8) and an oil detection chamber (10); the RGB three-color detector (2) and the light-emitting device (3) are respectively connected with the embedded signal processing board (1) through cables; the oil detection chamber (10) is used for storing transformer insulating oil, a window is formed in the side face of the oil detection chamber (10), and an optical window sheet (8) is hermetically installed in the window; one end of the incident optical fiber (6) is connected with the output end of the light-emitting device (3), and the other end of the incident optical fiber (6) is connected with the optical window sheet (8); one end of the emergent optical fiber (7) is connected with the optical window (8), and the other end of the emergent optical fiber (7) is connected with the input end of the RGB three-color detector (2).
The device sends an instruction through the embedded signal processing board (1) to control the light-emitting device (3) to emit laser, the laser irradiates on the optical window (8) through the incident optical fiber (6) and then irradiates on the transformer insulating oil in the oil detection chamber (10), and therefore the transformer insulating oil generates a fluorescent signal; the fluorescent signal is transmitted to the RGB three-color detector (2) through the emergent optical fiber (7), and the RGB three-color detector (2) converts the collected fluorescent signal into an electric signal and sends the electric signal into the embedded signal processing board (1) for data processing; compared with the prior art of transformer fault diagnosis, the utility model discloses a transformer insulating oil fluorescence detection device can acquire insulating oil fluorescence signal in real time on line, according to fluorescence signal diagnosis transformer state, possess the advantage of high detection sensitivity and contactless sampling in the nondestructive test, it needs the oil sample of consumption and measuring time longer to have compensatied physics and chemistry test technique, partial discharge test technique has the potential safety hazard and the dissolved gas analysis technique in the oil has the monitoring delay not enough, and equipment cost is lower, can promote transformer fault diagnosis practical application effect.
As a further improvement of the technical solution of the present invention, it further includes: an oil well pump (11); the control end of the oil well pump (11) is connected with the embedded signal processing board (1) through a cable, and the oil detection chamber (10), the oil well pump (11) and the transformer insulating oil tank are connected in series through oil pipeline to form a circulating oil path.
As a further improvement of the technical solution of the present invention, it further includes: the device comprises a device shell (5), wherein the embedded signal processing board (1), the RGB three-color detector (2), the light-emitting device (3), the incident optical fiber (6), the emergent optical fiber (7), the optical window sheet (8), the oil detection chamber (10) and the oil pump (11) are all arranged inside the device shell (5).
As a further improvement of the technical solution of the present invention, it further includes: an oil inlet (12) and an oil outlet (13); an oil inlet (12) is formed in the upper portion of one end of the device shell (5), an oil outlet (13) is formed in the lower portion, corresponding to the oil inlet (12), of the device shell (5), and the oil inlet (12) and the oil outlet (13) are respectively in sealing connection with the transformer insulating oil tank through oil way pipelines;
as the utility model discloses technical scheme's further improvement, the last port that detects room (10) of oil pass through oil circuit pipeline and oil inlet (12) sealing connection, the lower port that detects room (10) of oil passes through oil circuit pipeline and oil-well pump (11) input sealing connection, the output and the oil-out (13) sealing connection of oil-well pump (11).
As the utility model discloses technical scheme's further improvement, the last port of oil-well pump (11) pass through oil circuit pipeline and oil inlet (12) sealing connection, the lower port of oil-well pump (11) passes through oil circuit pipeline and the input sealing connection of oily detection room (10), the output and oil-out (13) sealing connection of oily detection room (10).
As the utility model discloses technical scheme's further improvement, illuminator (3) include ultraviolet emitting diode (4) and ball mirror (9), ultraviolet emitting diode (4) pass through the cable and be connected with embedded signal processing board (1), the one end and ball mirror (9) of incident optic fibre (6) be connected, the light that ultraviolet emitting diode (4) sent input incident optic fibre (6) through ball mirror (9) focus.
As a further improvement of the technical solution of the present invention, the model of the RGB three-color detector (2) is: and loosening the color mark sensor LX-101.
The utility model has the advantages that:
(1) the device sends an instruction through the embedded signal processing board (1) to control the light-emitting device (3) to emit laser, the laser irradiates on the optical window (8) through the incident optical fiber (6) and then irradiates on the transformer insulating oil in the oil detection chamber (10), and therefore the transformer insulating oil generates a fluorescent signal; the fluorescent signal is transmitted to the RGB three-color detector (2) through the emergent optical fiber (7), and the RGB three-color detector (2) converts the collected fluorescent signal into an electric signal and sends the electric signal into the embedded signal processing board (1) for data processing; compared with the prior art of transformer fault diagnosis, the utility model discloses a transformer insulating oil fluorescence detection device can acquire insulating oil fluorescence signal in real time on line, according to fluorescence signal diagnosis transformer state, possess the advantage of high detection sensitivity and contactless sampling in the nondestructive test, it needs the oil sample of consumption and measuring time longer to have compensatied physics and chemistry test technique, partial discharge test technique has the potential safety hazard and the dissolved gas analysis technique in the oil has the monitoring delay not enough, and equipment cost is lower, can promote transformer fault diagnosis practical application effect.
(2) In the detection process, the transformer insulating oil is circularly pumped out and pumped into the transformer insulating oil tank through the oil pump (11), and the detected transformer insulating oil is pumped into the transformer insulating oil tank again, so that lossless detection is realized, and resource waste is avoided.
(3) The RGB three-color detector 2 is of a loose color scale sensor LX-101, has a high-precision color scale color distinguishing function, can realize high-precision judgment with the resolution ratio of 1/4000, and is suitable for high-speed detection.
Drawings
FIG. 1 is a structural diagram of a fluorescent online detection device for transformer insulating oil according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the connection between the fluorescent online detection device for transformer insulating oil and the transformer insulating oil tank;
fig. 3 is a structure diagram of a partial discharge detection test platform of a transformer in the prior art.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The technical solution of the present invention is further described below with reference to the drawings and specific embodiments of the specification:
example one
As shown in fig. 1 and 2, the fluorescent online detection device for transformer insulating oil comprises: the device comprises an embedded signal processing board 1, an RGB (red, green and blue) three-color detector 2, a light-emitting device 3, a device shell 5, an incident optical fiber 6, an emergent optical fiber 7, an optical window sheet 8, an oil detection chamber 10, an oil well pump 11, an oil inlet 12 and an oil outlet 13.
The embedded signal processing board 1, the RGB three-color detector 2, the light-emitting device 3, the incident optical fiber 6, the emergent optical fiber 7, the optical window sheet 8, the oil detection chamber 10 and the oil pump 11 are all arranged in the device shell 5.
An oil inlet 12 is formed in the upper portion of one end of the device shell 5, an oil outlet 13 is formed in the lower portion, corresponding to the oil inlet 12, of the device shell 5, and the oil inlet 12 and the oil outlet 13 are respectively in sealing connection with the transformer insulating oil tank through oil way pipelines.
The upper port of the oil detection chamber 10 is hermetically connected with the oil inlet 12 through an oil pipeline, the lower port of the oil detection chamber 10 is hermetically connected with the input end of the oil well pump 11 through an oil pipeline, and the output end of the oil well pump 11 is hermetically connected with the oil outlet 13; the right side surface of the oil detection chamber 10 is provided with a window, and an optical window sheet 8 is hermetically arranged in the window.
The light-emitting device 3 comprises an ultraviolet light-emitting diode 4 and a ball lens 9, and the control ends of the RGB three-color detector 2, the ultraviolet light-emitting diode 4 and the oil well pump 11 are respectively connected with the embedded signal processing board 1 through cables; one end of the incident optical fiber 6 is connected with a ball lens 9, light emitted by the ultraviolet light emitting diode 4 is focused and input into the incident optical fiber 6 through the ball lens (9), and the other end of the incident optical fiber 6 is connected with an optical window sheet 8; one end of the emergent optical fiber 7 is connected with the optical window 8, and the other end of the emergent optical fiber 7 is connected with the input end of the RGB three-color detector 2.
The model of the RGB three-color detector 2 is as follows: the loose color code sensor LX-101 has a high-precision color code color distinguishing function, can realize high-precision judgment with the resolution of 1/4000, and is suitable for high-speed detection.
Example two
The difference from the first embodiment is that: the upper port of the oil well pump 11 is hermetically connected with the oil inlet 12 through an oil pipeline, the lower port of the oil well pump 11 is hermetically connected with the input end of the oil detection chamber 10 through an oil pipeline, and the output end of the oil detection chamber 10 is hermetically connected with the oil outlet 13.
EXAMPLE III
The working principle of the device is as follows:
(1) the embedded signal processing board 1 sends out an instruction to control the oil pump 11 to start, the oil pump 11 pumps the insulating oil in the transformer insulating oil tank into the oil detection chamber 10, and the transformer insulating oil is circularly pumped out and pumped into the transformer oil tank through the oil pump 11 in the detection process.
(2) The embedded signal processing board 1 sends out an instruction to control the ultraviolet light emitting diode 4 in the light emitting device 3 to emit laser, the laser is emitted through the ball lens 9 and then is irradiated on the optical window sheet 8 through the incident optical fiber 6, so that the laser is irradiated on the transformer insulating oil in the oil detection chamber 10, and the transformer insulating oil generates a fluorescent signal.
(3) The fluorescent signal is transmitted to the RGB three-color detector 2 through the emergent optical fiber 7, and the RGB three-color detector 2 converts the collected fluorescent signal into an electric signal and transmits the electric signal to the embedded signal processing board 1 for data processing.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The fluorescent online detection device for the insulating oil of the transformer is characterized by comprising an embedded signal processing board (1), an RGB (red, green and blue) three-color detector (2), a light-emitting device (3), an incident optical fiber (6), an emergent optical fiber (7), an optical window (8) and an oil detection chamber (10); the RGB three-color detector (2) and the light-emitting device (3) are respectively connected with the embedded signal processing board (1) through cables; the oil detection chamber (10) is used for storing transformer insulating oil, a window is formed in the side face of the oil detection chamber (10), and an optical window sheet (8) is hermetically installed in the window; one end of the incident optical fiber (6) is connected with the output end of the light-emitting device (3), and the other end of the incident optical fiber (6) is connected with the optical window sheet (8); one end of the emergent optical fiber (7) is connected with the optical window (8), and the other end of the emergent optical fiber (7) is connected with the input end of the RGB three-color detector (2).
2. The fluorescent online detection device for transformer insulating oil according to claim 1, further comprising: an oil well pump (11); the control end of the oil well pump (11) is connected with the embedded signal processing board (1) through a cable, and the oil detection chamber (10), the oil well pump (11) and the transformer insulating oil tank are connected in series through oil pipeline to form a circulating oil path.
3. The fluorescent online detection device for transformer insulating oil according to claim 2, further comprising: the device comprises a device shell (5), wherein the embedded signal processing board (1), the RGB three-color detector (2), the light-emitting device (3), the incident optical fiber (6), the emergent optical fiber (7), the optical window sheet (8), the oil detection chamber (10) and the oil pump (11) are all arranged inside the device shell (5).
4. The fluorescent online detection device for transformer insulating oil according to claim 3, further comprising: an oil inlet (12) and an oil outlet (13); an oil inlet (12) is formed in the upper portion of one end of the device shell (5), an oil outlet (13) is formed in the lower portion, corresponding to the oil inlet (12), of the device shell (5), and the oil inlet (12) and the oil outlet (13) are connected with the transformer insulating oil tank in a sealing mode through oil way pipelines respectively.
5. The fluorescence online detection device for the insulating oil of the transformer according to claim 4, wherein an upper port of the oil detection chamber (10) is hermetically connected with the oil inlet (12) through an oil pipeline, a lower port of the oil detection chamber (10) is hermetically connected with an input end of the oil well pump (11) through an oil pipeline, and an output end of the oil well pump (11) is hermetically connected with the oil outlet (13).
6. The fluorescence online detection device for transformer insulating oil according to claim 5, wherein an upper port of the oil pump (11) is hermetically connected with the oil inlet (12) through an oil pipeline, a lower port of the oil pump (11) is hermetically connected with an input end of the oil detection chamber (10) through an oil pipeline, and an output end of the oil detection chamber (10) is hermetically connected with the oil outlet (13).
7. The online fluorescence detection device for transformer insulating oil according to claim 1, wherein the light emitting device (3) comprises an ultraviolet light emitting diode (4) and a ball lens (9), the ultraviolet light emitting diode (4) is connected with the embedded signal processing board (1) through a cable, one end of the incident optical fiber (6) is connected with the ball lens (9), and light emitted by the ultraviolet light emitting diode (4) is focused and input to the incident optical fiber (6) through the ball lens (9).
8. The fluorescent online detection device for transformer insulating oil according to claim 1, wherein the type of the RGB three-color detector (2) is as follows: and loosening the color mark sensor LX-101.
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| CN202121017399.6U CN214895626U (en) | 2021-05-12 | 2021-05-12 | Fluorescent online detection device for transformer insulating oil |
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| CN202121017399.6U CN214895626U (en) | 2021-05-12 | 2021-05-12 | Fluorescent online detection device for transformer insulating oil |
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