A portable multi-parameter transformer insulating oil testing system

Abstract

The present invention relates to the technical field of transformer insulating oil detection, and in particular to a portable multi-parameter transformer insulating oil detection system. The detection system comprises: a detection chamber, which is used to contain the transformer insulating oil to be detected, and is provided with a plurality of sensor acquisition modules; a breathable and waterproof pressure-reducing device and a plurality of first ports are provided on the top of the detection chamber, and any of the first ports is used to add a test reagent; a screen window structure is provided in the detection chamber, and the screen window structure is used to make the polar molecules in the transformer insulating oil to be detected evenly distributed; a sampling pipeline, which is used to transport the transformer insulating oil to be detected to the detection chamber; a circulation pipeline, which is used to circulate the transformer insulating oil in the detection chamber; a data processing module, which is used to process the data collected by the sensor acquisition module; and an oil discharge pipeline, which is used to discharge the detected transformer insulating oil. The present invention can improve the timeliness, convenience and comprehensiveness of transformer insulating oil detection.

Description

Technical Field

[0001] The invention relates to the technical field of transformer insulating oil detection, in particular to a portable multi-parameter transformer insulating oil detection system. Background Art

[0002] In the prior art, the transformer insulating oil is usually tested by laboratory testing. The laboratory testing method has certain limitations in the testing items and cycles, and the laboratory testing method cannot monitor the internal state of the transformer in time, resulting in the inability to capture the signs of accidents in time. Although there are some devices for online monitoring of transformer insulating oil in the prior art, these devices for online monitoring of transformer insulating oil usually only monitor a few parameters of the transformer insulating oil. For example, the online monitoring device for the moisture content of the transformer insulating oil disclosed in the prior art can only monitor the moisture content of the transformer insulating oil; for example, the automatic detection system for the dielectric loss and resistivity of the transformer insulating oil disclosed in the prior art can only monitor the two parameters of the dielectric loss and resistivity of the transformer insulating oil. How to improve the timeliness, convenience and comprehensiveness of transformer insulating oil detection is an urgent problem to be solved. Summary of the invention

[0003] The present invention aims to provide a portable multi-parameter transformer insulating oil detection system to improve the timeliness, convenience and comprehensiveness of transformer insulating oil detection.

[0004] According to the present invention, a portable multi-parameter transformer insulating oil detection system is provided, the detection system comprising:

[0005] A detection chamber (100), the detection chamber (100) being used to contain transformer insulating oil to be detected, a plurality of sensor acquisition modules being arranged in the detection chamber (100), and different sensor acquisition modules being used to acquire different parameters of the transformer insulating oil to be detected; a breathable and waterproof pressure-reducing device (101) and a plurality of first ports (102) being arranged at the top of the detection chamber (100), any of the first ports (102) being used to add a test reagent; a screen window structure being arranged in the detection chamber (100), and the screen window structure being used to evenly distribute polar molecules in the transformer insulating oil to be detected.

[0006] A sampling pipeline (200), the sampling pipeline (200) being used to transport transformer insulating oil to be tested to a testing chamber (100); a first port of the sampling pipeline (200) being connected to an oil inlet (901), and a second port of the sampling pipeline (200) being connected to a second port of the testing chamber (100); and a screen-type structure being provided at the second port of the testing chamber (100).

[0007] A circulation pipeline (300), the circulation pipeline (300) being used to circulate transformer insulating oil in a detection chamber (100); a first oil pump (301) is provided on the circulation pipeline (300); an input port of the first oil pump (301) is connected to a third port of the detection chamber (100); and the third port of the detection chamber (100) is provided with a screen-type structure.

[0008] A data processing module (400), the data processing module (400) being used to process the data collected by the sensor collection module, the input end of the data processing module (400) being connected to the sensor collection module, the output end of the data processing module (400) being connected to a display (500) and an external transmission signal end, the external transmission signal end being used to store the processed data in a data storage card (600) or to send the processed data to a data center (700) via a wired or wireless method.

[0009] An oil drain pipeline (800) is used to drain the tested transformer insulating oil.

[0010] The present invention has at least the following beneficial effects:

[0011] The detection system of the present invention is a portable detection system, which is convenient to carry and can avoid the period of sending transformer insulating oil for inspection and laboratory coordination for sample inspection. It can realize timely collection and timely detection of transformer insulating oil, which is conducive to timely discovery of internal faults of transformer and greatly reducing the downtime rate of transformer; and it can collect multiple parameters of transformer insulating oil to realize comprehensive monitoring of transformer insulating oil. In particular, the top of the detection cavity in the detection system of the present invention is provided with a breathable and waterproof pressure-reducing device and several first ports for adding reagents, wherein the breathable and waterproof pressure-reducing device has the function of breathable pressure reduction and waterproof function at the same time, which is conducive to multiple sensor acquisition modules to accurately detect transformer insulating oil at the same time; wherein the first port provides the possibility for titration and colorimetric detection, which can detect some parameters more accurately, can detect more parameters, and can also perform redundant detection of some parameters, which greatly enhances the detection capability of the detection system of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1A schematic diagram of a portable multi-parameter transformer insulating oil detection system provided by an embodiment of the present invention;

[0014] Figure 2 A schematic diagram of a panel of a portable multi-parameter transformer insulating oil detection system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0016] According to the present invention, a portable multi-parameter transformer insulating oil detection system is provided. Figure 1 As shown, the detection system comprises:

[0017] A detection chamber 100 is provided, wherein the detection chamber 100 is used to contain transformer insulating oil to be detected. A plurality of sensor acquisition modules are arranged in the detection chamber 100, and different sensor acquisition modules are used to collect different parameters of the transformer insulating oil to be detected. A breathable and waterproof pressure-reducing device 101 and a plurality of first ports 102 are arranged on the top of the detection chamber 100, and any first port 102 is used to add a test reagent. A screen window structure is arranged in the detection chamber 100, and the screen window structure is used to make the polar molecules in the transformer insulating oil to be detected evenly distributed.

[0018] As a preferred specific embodiment, the breathable, waterproof and pressure-reducing device 101 is a tube connected to the outside air, and a diaphragm made of a polymer material is arranged in the middle of the tube, and the diaphragm is used to allow air to pass freely and prevent water molecules in the air from entering the detection cavity 100; thereby, nitrogen and oxygen molecules in the air can pass freely through the diaphragm, and the pressure in the detection cavity 100 is adjusted by the height of the insulating oil liquid level in the tube; since the pressure of the insulating oil in the transformer is close to the atmospheric pressure, when the detection cavity 100 is filled with oil, the air in the detection cavity 100 will be discharged from the tube into the atmosphere.

[0019] As a preferred specific implementation, the screen-type structure is made of a polymer material with a surface tension greater than a preset value, the mesh size of the screen-type structure is 1-10 mm, the screen-type structure is evenly arranged at each position where the screen-type structure is arranged, the mesh surface of the screen-type structure at each position is perpendicular to the circulation direction of the transformer insulating oil in the detection chamber 100, the screen-type structure at each position is 2-3 layers, and the size of each layer is equal to the size of the cross section of the detection chamber 100 perpendicular to the insulating oil circulation direction; based on the above mesh size, the polar molecules can be evenly separated without increasing the oil pressure in the detection chamber 100, and the screen-type structure is ensured not to be blocked by particles in the insulating oil. The above preset value is an empirical value.

[0020] As a preferred specific embodiment, the test reagents include colorimetric reagents, acidic or alkaline neutralizing reagents, reagents for colorimetric substances that are sensitive to water, and reagents for colorimetric substances that are sensitive to sulfur. Thus, the test data obtained by the detection method based on adding the test reagents can be combined with the test data obtained by the various sensor acquisition modules in the detection chamber 100 to form data fusion detection and redundant detection, so that the test data finally obtained is more accurate and can replace the regular laboratory testing requirements of multiple instruments. For example, phenolphthalein is added from the first port 102 to perform an acid-base test; an acidic or alkaline neutralizing reagent is added from the first port 102 to neutralize the total acid or residual alkaline antioxidant in the insulating oil; a reagent of a water-sensitive colorimetric substance is added from the first port 102 to measure the moisture content in the oil; a reagent of a sulfur-sensitive colorimetric substance is added from the first port 102 to measure the content of corrosive sulfur in the oil, wherein some sulfur-sensitive substances in the insulating oil react with sulfur to generate granular dark or black sulfides, and the colorimetric detection sensor acquisition module and the particle contamination detection sensor acquisition module in the detection cavity 100 can sense the above-mentioned products.

[0021] In this embodiment, the number of the first ports 102 is greater than or equal to 1; as a specific implementation, Figure 2 As shown, the number of the first ports 102 is 2, namely a first first port 1021 and a second first port 1022 .

[0022] As a preferred specific implementation, the sensor acquisition modules provided in the detection chamber 100 include: a colorimetric detection sensor acquisition module, an appearance detection sensor acquisition module, a breakdown voltage detection sensor acquisition module, a dielectric constant detection sensor acquisition module, a volume resistivity detection sensor acquisition module, a particle contamination detection sensor acquisition module, an interfacial tension detection sensor acquisition module, a water-soluble acid detection sensor acquisition module, an acid value detection sensor acquisition module, a moisture detection sensor acquisition module, a corrosive sulfur detection sensor acquisition module, a disulfide detection sensor acquisition module, a temperature detection sensor acquisition module, an oil sludge and sediment detection sensor acquisition module, and an antioxidant additive detection sensor acquisition module. Thus, the detection of various parameters of transformer insulating oil can be realized.

[0023] As a preferred specific implementation, the detection cavity 100 is a rectangular structure, and the acid value detection sensor acquisition module, moisture detection sensor acquisition module, dielectric constant detection sensor acquisition module and volume resistivity detection sensor acquisition module are arranged at the bottom of the detection cavity 100, with the sensitive surfaces facing upward; the colorimetry detection sensor acquisition module and appearance detection sensor acquisition module are arranged above the detection cavity 100, with the sensitive surfaces facing downward; the breakdown voltage detection sensor acquisition module, particle contamination detection sensor acquisition module, interfacial tension detection sensor acquisition module, water-soluble acid detection sensor acquisition module, corrosive sulfur detection sensor acquisition module, disulfide detection sensor acquisition module, temperature detection sensor acquisition module, sludge and sediment detection sensor acquisition module and antioxidant additive detection sensor acquisition module are arranged on the surrounding surfaces of the detection cavity 100; based on this setting position, it is beneficial to improve the detection accuracy of each sensor acquisition module on transformer insulating oil.

[0024] As a preferred specific embodiment, the outer wall of the detection cavity 100 is provided with a heating device, which is used to heat the transformer insulating oil in the detection cavity 100 to 50°C and maintain it, so that the transformer insulating oil can quickly and stably release the gas dissolved therein, and can inhibit the oxidation of the insulating oil caused by excessive temperature.

[0025] The sampling pipeline 200 is used to transport the transformer insulating oil to be tested to the detection chamber 100. The first port of the sampling pipeline 200 is connected to the oil inlet 901 (such as Figure 2 As shown), the second port of the sampling pipeline 200 is connected to the second port of the detection chamber 100; the sampling pipeline 200 is provided with a first valve 201, and the first valve 201 is used to control the opening and closing of the sampling pipeline 200; the second port of the detection chamber 100 is provided with a screen structure.

[0026] A circulation pipeline 300 is used to circulate the transformer insulating oil in the detection chamber 100. The circulation pipeline 300 is provided with a first oil pump 301 and a second valve 302. The input port of the first oil pump 301 is connected to the third port of the detection chamber 100, the oil outlet of the first oil pump 301 is connected to the first port of the second valve 302, and the second port of the second valve 302 is connected to the fourth port of the detection chamber 100; the third port of the detection chamber 100 is provided with a screen structure.

[0027] As a preferred specific implementation, the first oil pump 301 is used to keep the transformer insulating oil in the detection chamber 100 circulating once every 30-120 seconds, which is beneficial to improving the detection accuracy of each sensor acquisition module on the transformer insulating oil.

[0028] A data processing module 400 is used to process the data collected by the sensor acquisition module. The input end of the data processing module 400 is connected to the sensor acquisition module, and the output end of the data processing module 400 is connected to a display 500 and an external transmission signal end. The external transmission signal end is used to store the processed data in a data storage card 600 or send the processed data to a data center 700 by wire or wirelessly. Thus, the user can obtain the detection data of each parameter through the display, and the detection data of each parameter can also be effectively stored and sent out.

[0029] As a specific implementation, the display 500 is a touch display, so that the user can operate directly on the display.

[0030] As a specific implementation, Figure 2 As shown, the processed data is sent to the data center in a wired manner through the wired data transmission port 905; the processed data is sent to the data center in a wireless manner through the wireless data transmission antenna port 906; in addition, a charging port 903 and a power switch 904 are also provided on the panel of the portable multi-parameter transformer insulating oil detection system.

[0031] The oil drain pipeline 800 is used to discharge the tested transformer insulating oil. The first port of the oil drain pipeline 800 is connected to the oil outlet of the first oil pump 301, and the second port of the oil drain pipeline 800 is connected to the oil drain port 902 (such as Figure 2 As shown); the oil discharge pipeline 800 is provided with an oil return pump 801 and a third valve 802, and the third valve 802 is used to control the opening and closing of the oil discharge pipeline 800.

[0032] As a preferred specific embodiment, a plug-in filter 803 is also provided on the oil drain pipeline 800. The materials in the plug-in filter 803 include oil filter paper, silica gel, activated carbon, molecular sieve, metal powder sintered material, metal microporous material, ceramic filter material and filter paper filter core. Thus, polar molecules, metal cations, particulate matter and sludge in the insulating oil reflowing in the oil drain pipeline 800 can be filtered out, thereby realizing the recovery of the insulating oil reflowing in the oil drain pipeline 800.

[0033] The detection system of this embodiment is a portable detection system, which is convenient to carry and can avoid the period of sending transformer insulating oil for inspection and laboratory coordination for sample inspection. It can realize timely collection and timely detection of transformer insulating oil, which is conducive to timely discovery of internal faults of transformer and greatly reducing the downtime rate of transformer; and it can collect multiple parameters of transformer insulating oil to realize comprehensive monitoring of transformer insulating oil. In particular, the top of the detection cavity in the detection system of the present invention is provided with a breathable and waterproof pressure-reducing device 101 and several first ports 102 for adding reagents, wherein the breathable and waterproof pressure-reducing device 101 has the function of breathable pressure reduction and waterproof function at the same time, which is conducive to multiple sensor acquisition modules to accurately detect transformer insulating oil at the same time; wherein the first port 102 provides the possibility for titration and colorimetric detection, which can detect some parameters more accurately, can detect more parameters, and can also perform redundant detection of some parameters, which greatly enhances the detection capability of the detection system of this embodiment.

[0034] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will also be appreciated by those skilled in the art that various modifications may be made to the embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A portable multi-parameter transformer insulating oil detection system, characterized in that: The detection system comprises: A detection chamber (100), the detection chamber (100) being used to contain transformer insulating oil to be detected, a plurality of sensor acquisition modules being arranged in the detection chamber (100), and different sensor acquisition modules being used to acquire different parameters of the transformer insulating oil to be detected; a breathable and waterproof pressure-reducing device (101) and a plurality of first ports (102) being arranged at the top of the detection chamber (100), and any of the first ports (102) being used to add a test reagent; a screen window structure being arranged in the detection chamber (100), and the screen window structure being used to evenly distribute polar molecules in the transformer insulating oil to be detected; A sampling pipeline (200), the sampling pipeline (200) being used to transport transformer insulating oil to be tested to the testing chamber (100); a first port of the sampling pipeline (200) being connected to an oil inlet (901), and a second port of the sampling pipeline (200) being connected to a second port of the testing chamber (100); and a screen-type structure being provided at the second port of the testing chamber (100); A circulation pipeline (300), the circulation pipeline (300) being used to circulate transformer insulating oil in the detection chamber (100); a first oil pump (301) is provided on the circulation pipeline (300); an input port of the first oil pump (301) is connected to a third port of the detection chamber (100); and a screen-type structure is provided on the third port of the detection chamber (100); A data processing module (400), the data processing module (400) being used to process the data collected by the sensor collection module, the input end of the data processing module (400) being connected to the sensor collection module, the output end of the data processing module (400) being connected to a display (500) and an external transmission signal end, the external transmission signal end being used to store the processed data in a data storage card (600) or to send the processed data to a data center (700) in a wired or wireless manner; An oil drain pipeline (800) is used to drain the tested transformer insulating oil.

2. The portable multi-parameter transformer insulating oil detection system according to claim 1 is characterized in that: The sampling pipeline (200) is provided with a first valve (201), and the first valve (201) is used to control the opening and closing of the sampling pipeline (200); the circulation pipeline (300) is also provided with a second valve (302), the oil outlet of the first oil pump (301) is connected to the first port of the second valve (302), and the second port of the second valve (302) is connected to the fourth port of the detection chamber (100); the first port of the oil discharge pipeline (800) is connected to the oil outlet of the first oil pump (301), and the second port of the oil discharge pipeline (800) is connected to the oil discharge port (902); the oil return pump (801) and the third valve (802) are provided on the oil discharge pipeline (800), and the third valve (802) is used to control the opening and closing of the oil discharge pipeline (800).

3. The portable multi-parameter transformer insulating oil detection system according to claim 1 is characterized in that: The test reagents include a color developing reagent, an acidic or alkaline neutralizing reagent, a reagent for a color developing substance that is sensitive to water, and a reagent for a color developing substance that is sensitive to sulfur.

4. The portable multi-parameter transformer insulating oil detection system according to claim 1 is characterized in that: The air-permeable, waterproof and pressure-reducing device (101) is a tube connected to the outside air, with a diaphragm made of a polymer material arranged in the middle of the tube, the diaphragm being used to allow air to pass freely and to prevent water molecules in the air from entering the detection cavity (100).

5. The portable multi-parameter transformer insulating oil detection system according to claim 2 is characterized in that: The oil discharge pipeline (800) is also provided with a plug-in filter (803), and the materials in the plug-in filter (803) include oil filter paper, silica gel, activated carbon, molecular sieve, metal powder sintered material, metal microporous material, ceramic filter material and filter paper filter core.

6. The portable multi-parameter transformer insulating oil detection system according to claim 1 is characterized in that: The outer wall of the detection cavity (100) is provided with a heating device, and the heating device is used to heat the transformer insulating oil in the detection cavity (100) to 50° C. and maintain the temperature, so that the transformer insulating oil releases dissolved gas.

7. The portable multi-parameter transformer insulating oil detection system according to claim 1 is characterized in that: The sensor acquisition modules arranged in the detection cavity (100) include: a chromaticity detection sensor acquisition module, an appearance detection sensor acquisition module, a breakdown voltage detection sensor acquisition module, a dielectric constant detection sensor acquisition module, a volume resistivity detection sensor acquisition module, a particle contamination detection sensor acquisition module, an interfacial tension detection sensor acquisition module, a water-soluble acid detection sensor acquisition module, an acid value detection sensor acquisition module, a moisture detection sensor acquisition module, a corrosive sulfur detection sensor acquisition module, a disulfide detection sensor acquisition module, a temperature detection sensor acquisition module, a sludge and sediment detection sensor acquisition module, and an antioxidant additive detection sensor acquisition module.

8. The portable multi-parameter transformer insulating oil detection system according to claim 7 is characterized in that: The detection cavity (100) is a rectangular parallelepiped structure, and the acid value detection sensor acquisition module, the moisture detection sensor acquisition module, the dielectric constant detection sensor acquisition module, and the volume resistivity detection sensor acquisition module are arranged at the bottom of the detection cavity (100), with the sensitive surface facing upwards; The colorimetric detection sensor acquisition module and the appearance detection sensor acquisition module are arranged above the detection cavity (100), with the sensitive surfaces facing downward; the breakdown voltage detection sensor acquisition module, the particle contamination detection sensor acquisition module, the interfacial tension detection sensor acquisition module, the water-soluble acid detection sensor acquisition module, the corrosive sulfur detection sensor acquisition module, the disulfide detection sensor acquisition module, the temperature detection sensor acquisition module, the sludge and sediment detection sensor acquisition module, and the antioxidant additive detection sensor acquisition module are arranged on the surrounding surfaces of the detection cavity (100).

9. The portable multi-parameter transformer insulating oil detection system according to claim 1, characterized in that: The first oil pump (301) is used to maintain the transformer insulating oil in the detection chamber (100) at a circulation rate of 30-120 seconds per cycle.

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