A method and device for monitoring migration of impurity particles, a terminal device and a medium

Abstract

The application discloses a kind of impurity particle migration monitoring method, device, terminal equipment and medium, obtain several groups of operating conditions, in the same transformer riser original internal flow field distribution with transformer riser, and according to transformer riser original element scaling transformer riser scale ratio experiment platform, the change concentration of impurity particle under each group of operating conditions is collected in preset time by acquisition device, according to the initial concentration of impurity particle under each group of operating conditions, temperature, voltage, flow rate and the change concentration of impurity particle in preset time, the diffusion change data corresponding to temperature, voltage and flow rate of each group of operating conditions of impurity particle in preset time is obtained by polynomial fitting, and diffusion change data is sent to user end, so that user end calculates the initial concentration of impurity particle, temperature, voltage and flow rate corresponding to the concentration change of impurity particle in real time according to diffusion change data of transformer riser to be measured, the monitoring of impurity particle migration is realized.

Description

Technical Field

[0001] This invention relates to the field of transformer detection technology, and in particular to a method, device, terminal equipment, and medium for monitoring the migration of impurity particles. Background Technology

[0002] The riser box or terminal box of a large transformer serves as a critical channel for winding outgoing lines, characterized by large lead currents, high and complex electric fields. Simultaneously, this area has large oil gaps and poor oil circulation. In the event of a discharge fault, carbon black particles contained in the transformer oil can easily bridge in situ, accelerating the fault's development. Current technology has not studied the migration of impurity particles in the riser box of large transformers, leading to inaccurate monitoring of impurity particles in the riser box.

[0003] Therefore, there is an urgent need for a method to monitor the migration of impurity particles, thereby solving the problem of inaccurate monitoring of impurity particles in transformer riser seats. Summary of the Invention

[0004] This invention provides a method, apparatus, terminal equipment, and medium for monitoring the migration of impurity particles, thereby improving the monitoring accuracy of impurity particles in a pressure riser seat.

[0005] To address the above problems, one embodiment of the present invention provides a method for monitoring the migration of impurity particles, comprising:

[0006] Several sets of operating conditions are acquired; wherein, the operating conditions include: initial concentration of impurity particles, temperature, voltage and flow rate;

[0007] In a preset transformer riser scaling experimental platform, the concentration of impurity particles corresponding to each set of operating conditions within a preset time is acquired by a data acquisition device; wherein, the transformer riser scaling experimental platform has the same internal flow field distribution as the original transformer riser component; and the size parameters of the original transformer riser component are scaled proportionally to obtain the preset transformer riser scaling experimental platform.

[0008] Based on the initial concentration, temperature, voltage, flow rate, and change in impurity particle concentration within a preset time under each set of operating conditions, polynomial fitting is used to obtain diffusion change data corresponding to temperature, voltage, and flow rate under each set of operating conditions within the preset time. This diffusion change data is then sent to the user terminal, enabling the user terminal to monitor the diffusion change of impurity particle concentration at several sampling points of the transformer riser component under test based on the received real-time initial concentration, real-time temperature, real-time voltage, and real-time flow rate.

[0009] As an improvement to the above solution, it also includes: the preset transformer height reduction ratio experimental platform, comprising: a vacuum pump, a high-voltage lead, an oil tank, a pressure gauge, an observation window, a flange, a first oil passage, a second oil passage, a bellows, an oil pump, a flow meter, an oil filling tank, a syringe, a ring, and a sampling hole; wherein, the first oil passage is connected to the high-voltage lead, the oil tank, the pressure gauge, the observation window, the flange, the syringe, the ring, and the sampling hole respectively; the vacuum pump is connected to the oil tank; the second oil passage is connected to the bellows, the oil pump, the flow meter, and the oil filling tank respectively.

[0010] As a modification to the above scheme, before acquiring the change in impurity particle concentration corresponding to each group of operating conditions within a preset time using the acquisition device, the method further includes: determining the ratio between the flow velocity in the pipe below the transformer riser scaling experimental platform and the flow velocity in the pipe below the transformer riser component.

[0011] When the preset internal flow field distribution of the transformer riser scaling experimental platform is the same as that of the transformer riser component, the first flow velocity of the pipe below the transformer riser component and the second flow velocity of the pipe below the transformer riser scaling experimental platform are obtained.

[0012] The flow rate ratio is calculated using fluid dynamics calculations based on the first flow rate and the second flow rate.

[0013] When the ratio is equal to the flow rate ratio, it is determined that the preset transformer riser scaling ratio experimental platform and the transformer riser component have the same internal flow field distribution, and the test data is acquired.

[0014] If the ratio is not equal to the flow rate ratio, it is determined that the internal flow field distribution of the preset transformer riser scaling experimental platform and the transformer riser component is different, and the ratio between the flow rate of the transformer riser scaling experimental platform and the flow rate of the transformer riser component is re-evaluated.

[0015] As an improvement to the above solution, before acquiring the concentration change of impurity particles corresponding to each set of operating conditions within a preset time period through the acquisition device, the following method is further included:

[0016] The preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage. After the vacuum treatment is completed, the oil filling operation is performed on the first oil passage and the second oil passage using the oil filling tank.

[0017] After the oil injection operation is completed, the preset transformer height reduction ratio test platform uses the vacuum pump and the first oil passage and the second oil passage of the oil pump for circulation degassing.

[0018] After a first preset time, the preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage.

[0019] As an improvement to the above solution, after the preset transformer height-to-shortage ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage, it further includes:

[0020] The transformer height-to-shortage ratio test platform uses the oil pump to adjust the flow rate according to the operating conditions of each group.

[0021] The transformer height-to-shortage ratio test platform uses the bellows to adjust the temperature according to the operating conditions of each group.

[0022] The transformer height adjustment ratio test platform uses the high-voltage lead to adjust the voltage according to the voltage in each set of operating conditions.

[0023] The transformer rise-to-shortage ratio test platform uses the oil injection tank to adjust the initial concentration of impurity particles in each set of operating conditions; wherein, the oil injection tank contains impurity particles and transformer oil.

[0024] Accordingly, one embodiment of the present invention also provides a monitoring device for the migration of impurity particles, including: a data acquisition module, a data collection module, and a data fitting module;

[0025] The data acquisition module is used to acquire several sets of operating conditions; wherein, the operating conditions include: initial concentration of impurity particles, temperature, voltage and flow rate;

[0026] The data acquisition module is used to acquire the change concentration of impurity particles corresponding to each set of operating conditions within a preset time period in a preset transformer riser scaling experimental platform; wherein the transformer riser scaling experimental platform has the same internal flow field distribution as the original transformer riser component; and the size parameters of the original transformer riser component are scaled proportionally to obtain the preset transformer riser scaling experimental platform.

[0027] The data fitting module is used to obtain diffusion change data of impurity particles corresponding to temperature, voltage, and flow rate under each set of operating conditions within a preset time by using polynomial fitting based on the initial concentration, temperature, voltage, flow rate, and change in impurity particle concentration within a preset time under each set of operating conditions. The diffusion change data is then sent to the user terminal so that the user terminal can monitor the diffusion change of impurity particle concentration at several sampling points of the transformer riser component under test based on the real-time initial concentration, real-time temperature, real-time voltage, and real-time flow rate received from the transformer riser component under test.

[0028] As an improvement to the above solution, it also includes: the preset transformer height reduction ratio experimental platform, comprising: a vacuum pump, a high-voltage lead, an oil tank, a pressure gauge, an observation window, a flange, a first oil passage, a second oil passage, a bellows, an oil pump, a flow meter, an oil filling tank, a syringe, a ring, and a sampling hole; wherein, the first oil passage is connected to the high-voltage lead, the oil tank, the pressure gauge, the observation window, the flange, the syringe, the ring, and the sampling hole respectively; the vacuum pump is connected to the oil tank; the second oil passage is connected to the bellows, the oil pump, the flow meter, and the oil filling tank respectively.

[0029] As a modification to the above scheme, before acquiring the change in impurity particle concentration corresponding to each group of operating conditions within a preset time using the acquisition device, the method further includes: determining the ratio between the flow velocity in the pipe below the transformer riser scaling experimental platform and the flow velocity in the pipe below the transformer riser component.

[0030] When the preset internal flow field distribution of the transformer riser scaling experimental platform is the same as that of the transformer riser component, the first flow velocity of the pipe below the transformer riser component and the second flow velocity of the pipe below the transformer riser scaling experimental platform are obtained.

[0031] The flow rate ratio is calculated using fluid dynamics calculations based on the first flow rate and the second flow rate.

[0032] When the ratio is equal to the flow rate ratio, it is determined that the preset transformer riser scaling ratio experimental platform and the transformer riser component have the same internal flow field distribution, and the test data is acquired.

[0033] If the ratio is not equal to the flow rate ratio, it is determined that the internal flow field distribution of the preset transformer riser scaling experimental platform and the transformer riser component is different, and the ratio between the flow rate of the transformer riser scaling experimental platform and the flow rate of the transformer riser component is re-evaluated.

[0034] As an improvement to the above solution, before acquiring the concentration change of impurity particles corresponding to each set of operating conditions within a preset time period through the acquisition device, the following method is further included:

[0035] The preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage. After the vacuum treatment is completed, the oil filling operation is performed on the first oil passage and the second oil passage using the oil filling tank.

[0036] After the oil injection operation is completed, the preset transformer height reduction ratio test platform uses the vacuum pump and the first oil passage and the second oil passage of the oil pump for circulation degassing.

[0037] After a first preset time, the preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage.

[0038] As an improvement to the above solution, after the preset transformer height-to-shortage ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage, it further includes:

[0039] The transformer height-to-shortage ratio test platform uses the oil pump to adjust the flow rate according to the operating conditions of each group.

[0040] The transformer height-to-shortage ratio test platform uses the bellows to adjust the temperature according to the operating conditions of each group.

[0041] The transformer height adjustment ratio test platform uses the high-voltage lead to adjust the voltage according to the voltage in each set of operating conditions.

[0042] The transformer rise-to-shortage ratio test platform uses the oil injection tank to adjust the initial concentration of impurity particles in each set of operating conditions; wherein, the oil injection tank contains impurity particles and transformer oil.

[0043] Accordingly, one embodiment of the present invention also provides a computer terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement a method for monitoring the migration of impurity particles as described in the present invention.

[0044] Accordingly, one embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform a monitoring method for the migration of impurity particles as described in the present invention.

[0045] As can be seen from the above, the present invention has the following beneficial effects:

[0046] This invention provides a method for monitoring impurity particle migration. After acquiring several sets of operating conditions, in a scaled-down experimental platform of a transformer riser (similar to the internal flow field distribution of the original transformer riser component and scaled proportionally to the original component), a data acquisition device collects the concentration changes of impurity particles under each set of operating conditions within a preset time. Based on the initial concentration, temperature, voltage, and flow rate of impurity particles under each set of operating conditions, and the concentration changes of impurity particles within the preset time, polynomial fitting is used to obtain the diffusion change data of impurity particles corresponding to temperature, voltage, and flow rate under each set of operating conditions within the preset time. This diffusion change data is then sent to the user terminal, allowing the user terminal to calculate the real-time changes in impurity particle concentration at multiple sampling points of the transformer riser component based on the diffusion change data, thereby achieving the monitoring of impurity particle migration. This invention simulates the actual structure of the transformer riser component, allowing for more targeted study of the movement and aggregation of impurity particles within the riser component. This is beneficial for determining whether the transformer riser component is faulty based on the migration of impurity particles within it. Attached Figure Description

[0047] Figure 1 This is a schematic flowchart of a method for monitoring the migration of impurity particles provided in an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the structure of a monitoring device for the migration of impurity particles provided in an embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of the transformer height-to-shortage ratio experimental platform structure provided in an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of the sampling hole provided in an embodiment of the present invention;

[0051] Figure 5 This is a schematic diagram of a terminal device structure provided in an embodiment of the present invention. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Example 1

[0054] See Figure 1 , Figure 1 This is a schematic flowchart of a method for monitoring the migration of impurity particles according to an embodiment of the present invention, as shown below. Figure 1 As shown, this embodiment includes steps 101 to 103, and the specific steps are as follows:

[0055] Step 101: Obtain several sets of operating conditions; wherein, the operating conditions include: initial concentration of impurity particles, temperature, voltage and flow rate.

[0056] In one specific embodiment, the operating conditions are designed using an orthogonal method for the transformer oil inside the transformer riser.

[0057] In this embodiment, an orthogonal method is used for experimental design to obtain the operating conditions: The initial particle concentration of impurities is selected from three parameters: high, medium, and low (the specific values ​​can be adaptively adjusted according to user requirements); the temperature is selected from three values: 50℃, 65℃, and 80℃, based on the actual operating conditions of the transformer; the voltage can be selected from a range of 50kV to 100kV (the specific values ​​can be adaptively adjusted according to user requirements); and the flow velocity can be selected from 0 to 0.6m / s (the specific values ​​can be adaptively adjusted according to user requirements). Sixteen sets of operating conditions obtained using the orthogonal method are shown in Table 1 below.

[0058]

[0059] Table 1

[0060] In one specific embodiment, fiber particles are mixed with transformer oil in a certain ratio and stirred in an oil filling tank to obtain transformer oil with particle concentration; the particle concentration is detected and calibrated using a particle size analyzer.

[0061] Step 102: In the preset transformer riser scaling experimental platform, the concentration of impurity particles corresponding to each set of operating conditions within a preset time is obtained by the acquisition device; wherein, the transformer riser scaling experimental platform has the same internal flow field distribution as the transformer riser component; and the size parameters of the transformer riser component are scaled proportionally to obtain the preset transformer riser scaling experimental platform.

[0062] In this embodiment, the system further includes: the preset transformer height reduction ratio experimental platform, comprising: a vacuum pump, a high-voltage lead, an oil tank, a pressure gauge, an observation window, a flange, a first oil passage, a second oil passage, a bellows, an oil pump, a flow meter, an oil filling tank, a syringe, a ring, and a sampling hole; wherein, the first oil passage is connected to the high-voltage lead, the oil tank, the pressure gauge, the observation window, the flange, the syringe, the ring, and the sampling hole respectively; the vacuum pump is connected to the oil tank; and the second oil passage is connected to the bellows, the oil pump, the flow meter, and the oil filling tank respectively.

[0063] In a specific embodiment, for a better illustration of the structure of the transformer height-to-shortage ratio experimental platform, please refer to [link to relevant documentation]. Figure 3 :

[0064] Vacuum pump 1 is used to evacuate the test device before and during oil filling to prevent the generation of air bubbles;

[0065] High-voltage lead 2 is used to generate electric field conditions;

[0066] Oil tank 3 is used to prevent transformer oil from entering the vacuum pump; during the oil filling process, a small amount of residual gas in the device is introduced into the oil tank to prevent the formation of air bubbles; the valve at the bottom of the oil tank is closed when the oil level exceeds one-third of the tank height.

[0067] Pressure gauge 4 is used to measure the pressure inside the device during vacuuming;

[0068] Observation window 5 is used to observe the gas production and impurity particle aggregation near the pressure equalization ball;

[0069] The flange is used to assemble the riser, making the riser detachable and facilitating other related experiments, such as the L-shaped riser.

[0070] The first oil passage 7 is rectangular, which is closer to the structure and oil flow of the lower part of the actual transformer riser.

[0071] The second oil passage 8 is circular, which facilitates the installation of equipment such as bellows, oil pumps, and pressure gauges;

[0072] Bellows 9 is used to regulate oil pressure (oil pressure is mainly affected by transformer oil temperature and gas production);

[0073] The oil pump 10 is used to regulate the oil flow rate in the first oil passage by controlling the flow rate;

[0074] Flow meter 11 is used to count the flow rate in the second oil passage;

[0075] Oil filling tank 12 is used to inject transformer oil. It is placed at the bottom of the pipeline to avoid the formation of air bubbles.

[0076] Needle 13, the needle including one of an injection needle or a sampling needle, is used to inject air into or sample the inside of the transformer riser.

[0077] Ring 14 is used to discharge oil.

[0078] Sampling port 15 is used to connect sampling equipment.

[0079] In this embodiment, the actual oil flow inside the transformer and the oil flow characteristics of the riser block are fully considered, which can accurately reflect the migration characteristics of impurities inside the transformer oil. A scaled-down experimental platform was established based on the actual structure of the 220kV transformer riser block component, and it can generate similar flow field and electric field distributions.

[0080] In one specific embodiment, the sampling port employs a nut structure and is sealed with a silicone gasket. After the experiment, a sampling device is used to collect a sample. For a better illustration of the sampling port structure, please refer to [link to relevant documentation]. Figure 4 The sampling hole nut structure makes it easy to replace the silicone pad. The structure is simple and can ensure the sealing during the experiment and facilitate the collection of oil samples after the experiment.

[0081] In one specific embodiment, the oil flow velocity in the lower pipeline of the transformer is adjustable, and the oil passage is located below the riser seat, which is basically consistent with the oil flow conditions of the riser seat in an actual transformer. The transformer riser seat scaling experimental platform simulates the oil flow conditions of the lower part and inside of the actual transformer riser seat, taking into account the influence of oil flow, temperature and other factors on the migration of characteristic gases.

[0082] In one specific embodiment, the transformer riser scaling experimental platform simulates the actual structure of a 220kV transformer riser through high-voltage leads; the high-voltage bushing is connected to a 50kV power frequency voltage, which can generate electric field conditions similar to those inside the 220kV transformer riser, while saving oil consumption, reducing costs, and facilitating multiple experiments.

[0083] Preferably, the platform allows for experimental analysis of the effects of different factors (fault gas concentration, temperature, oil flow) on diffusion, providing a basis for optimizing online monitoring of transformer oil chromatography. A monitoring system for observing the bubble aggregation process is constructed, with transparent plexiglass windows installed before and after the equalizing sphere to facilitate observation of gas generation and bubble diffusion. The imaging equipment uses a high-speed camera, which communicates with a computer via shielded twisted-pair cable, allowing real-time observation of bubble movement.

[0084] In this embodiment, before acquiring the change in impurity particle concentration corresponding to each group of operating conditions within a preset time period using the acquisition device, the method further includes: determining the ratio between the flow velocity in the pipe below the transformer riser scaling experimental platform and the flow velocity in the pipe below the transformer riser component.

[0085] When the preset internal flow field distribution of the transformer riser scaling experimental platform is the same as that of the transformer riser component, the first flow velocity of the pipe below the transformer riser component and the second flow velocity of the pipe below the transformer riser scaling experimental platform are obtained.

[0086] The flow rate ratio is calculated using fluid dynamics calculations based on the first flow rate and the second flow rate.

[0087] When the ratio is equal to the flow rate ratio, it is determined that the preset transformer riser scaling ratio experimental platform and the transformer riser component have the same internal flow field distribution, and the test data is acquired.

[0088] If the ratio is not equal to the flow rate ratio, it is determined that the internal flow field distribution of the preset transformer riser scaling experimental platform and the transformer riser component is different, and the ratio between the flow rate of the transformer riser scaling experimental platform and the flow rate of the transformer riser component is re-evaluated.

[0089] In a specific embodiment, the equivalence of the oil flow inside the scaled-down riser platform with that of the actual size riser platform was verified using fluid calculations. When the ratio of the flow velocity in the pipe below the actual riser platform to that in the scaled-down riser platform was approximately 1:2, the flow field distribution inside the scaled-down riser platform was basically consistent with that of the actual size riser platform. Currently, the actual flow velocity in the transformer body in China is generally below 0.33 m / s, with an average velocity of approximately 0.2 m / s. Therefore, the oil flow velocity range studied in the scaled-down transformer riser platform experimental platform is 0–0.60 m / s, and a centrifugal adjustable-speed circulating oil pump is used.

[0090] In this embodiment, before acquiring the concentration change of impurity particles corresponding to each group of operating conditions within a preset time period through the acquisition device, the method further includes:

[0091] The preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage. After the vacuum treatment is completed, the oil filling operation is performed on the first oil passage and the second oil passage using the oil filling tank.

[0092] After the oil injection operation is completed, the preset transformer height reduction ratio test platform uses the vacuum pump and the first oil passage and the second oil passage of the oil pump for circulation degassing.

[0093] After a first preset time, the preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage.

[0094] In one specific embodiment, the experimental platform is evacuated and then oil is injected; after the vacuum oil injection is completed, the system is evacuated and circulated for one hour, then the oil pump is turned off and the system is left in a vacuum state for one hour to remove as much air as possible from the oil.

[0095] In this embodiment, after the preset transformer height reduction ratio experimental platform performs vacuum treatment on the first oil passage and the second oil passage using the vacuum pump, it further includes:

[0096] The transformer height-to-shortage ratio test platform uses the oil pump to adjust the flow rate according to the operating conditions of each group.

[0097] The transformer height-to-shortage ratio test platform uses the bellows to adjust the temperature according to the operating conditions of each group.

[0098] The transformer height adjustment ratio test platform uses the high-voltage lead to adjust the voltage according to the voltage in each set of operating conditions.

[0099] The transformer rise-to-shortage ratio test platform uses the oil injection tank to adjust the initial concentration of impurity particles in each set of operating conditions; wherein, the oil injection tank contains impurity particles and transformer oil.

[0100] In one specific embodiment, after vacuum treatment, the transformer riser compression ratio experimental platform: opens the vent valve and adjusts the pressure according to the bellows to adjust the oil temperature; starts the oil pump to adjust the flow rate; starts the high-voltage lead to apply voltage to the oil to simulate a 220kV operating environment; introduces fiber particles by controlling the oil injection tank, collects oil samples at sampling ports at intervals Δt, and tests the particle concentration in the oil.

[0101] In one specific embodiment, the high-voltage lead is connected to a 50kV power frequency voltage, which can generate electric field conditions similar to those inside the riser of a 220kV transformer.

[0102] In one specific embodiment, the oil flow velocity in the lower pipe is adjustable, and the oil passage is located below the riser seat, which is basically consistent with the oil flow conditions of the riser seat in an actual transformer. This simulates the oil flow conditions in the lower part and inside the riser seat of an actual transformer, and takes into account the influence of oil flow on the movement and migration of impurity particles.

[0103] Step 103: Based on the initial concentration, temperature, voltage, flow rate, and change in impurity particle concentration within a preset time under each set of operating conditions, obtain the diffusion change data corresponding to the temperature, voltage, and flow rate of impurity particles under each set of operating conditions within the preset time through polynomial fitting. Send the diffusion change data to the user terminal so that the user terminal can monitor the diffusion change of impurity particle concentration at several sampling points of the riser component of the transformer under test based on the real-time initial concentration, real-time temperature, real-time voltage, and real-time flow rate of impurity particles received from the riser component of the transformer under test.

[0104] In this embodiment, statistical analysis of diffusion change data is performed, and polynomial fitting is used to obtain the relationship between the diffusion concentration of impurity particles in the oil and the oil flow velocity, temperature, and electric field.

[0105] In this embodiment, the scaled-down platform of the riser seat can generate an electric field and flow field similar to that of an actual 220kV transformer riser seat, while saving oil consumption, reducing costs, and facilitating multiple experiments.

[0106] In this embodiment, after acquiring several sets of operating conditions, a scaled-down experimental platform for a transformer riser, identical to the internal flow field distribution of the original transformer riser component and proportionally scaled according to the original transformer riser component, is used to collect the concentration changes of impurity particles under each set of operating conditions within a preset time period. Based on the initial concentration, temperature, voltage, and flow rate of impurity particles under each set of operating conditions, and the concentration changes of impurity particles within the preset time period, polynomial fitting is used to obtain the diffusion change data of impurity particles corresponding to temperature, voltage, and flow rate under each set of operating conditions within the preset time period. This diffusion change data is then sent to the user terminal, allowing the user terminal to calculate the real-time changes in impurity particle concentration corresponding to the initial concentration, temperature, voltage, and flow rate at multiple sampling points of the transformer riser under test, thus realizing the monitoring of impurity particle migration. This embodiment considers the influence of factors such as electric field, oil flow, and temperature on the transport characteristics of fiber particles, and conducts targeted research on long oil gap faults within the transformer riser, studying the fault occurrence mechanism of long oil gaps and finding evidence of the causes of long oil gap discharge faults in transformers.

[0107] Example 2

[0108] See Figure 2 , Figure 2 This is a schematic diagram of the structure of a monitoring device for the migration of impurity particles provided in an embodiment of the present invention, including: a data acquisition module 201, a data collection module 202, and a data fitting module 203;

[0109] The data acquisition module 201 is used to acquire several sets of operating conditions; wherein, the operating conditions include: initial concentration of impurity particles, temperature, voltage and flow rate;

[0110] The data acquisition module 202 is used to acquire the change concentration of impurity particles corresponding to each set of operating conditions within a preset time period in a preset transformer riser scaling experimental platform; wherein, the transformer riser scaling experimental platform has the same internal flow field distribution as the original transformer riser component; and the size parameters of the original transformer riser component are scaled proportionally to obtain the preset transformer riser scaling experimental platform.

[0111] The data fitting module 203 is used to obtain diffusion change data of impurity particles corresponding to temperature, voltage, and flow rate of each set of operating conditions within a preset time by using polynomial fitting based on the initial concentration, temperature, voltage, flow rate, and change concentration of impurity particles within a preset time under each set of operating conditions. The diffusion change data is then sent to the user terminal so that the user terminal can monitor the diffusion change of impurity particle concentration at several sampling points of the riser component of the transformer under test based on the real-time initial concentration, real-time temperature, real-time voltage, and real-time flow rate of impurity particles received from the riser component of the transformer under test.

[0112] As an improvement to the above solution, it also includes: the preset transformer height reduction ratio experimental platform, comprising: a vacuum pump, a high-voltage lead, an oil tank, a pressure gauge, an observation window, a flange, a first oil passage, a second oil passage, a bellows, an oil pump, a flow meter, an oil filling tank, a syringe, a ring, and a sampling hole; wherein, the first oil passage is connected to the high-voltage lead, the oil tank, the pressure gauge, the observation window, the flange, the syringe, the ring, and the sampling hole respectively; the vacuum pump is connected to the oil tank; the second oil passage is connected to the bellows, the oil pump, the flow meter, and the oil filling tank respectively.

[0113] As a modification to the above scheme, before acquiring the change in impurity particle concentration corresponding to each group of operating conditions within a preset time using the acquisition device, the method further includes: determining the ratio between the flow velocity in the pipe below the transformer riser scaling experimental platform and the flow velocity in the pipe below the transformer riser component.

[0114] When the preset internal flow field distribution of the transformer riser scaling experimental platform is the same as that of the transformer riser component, the first flow velocity of the pipe below the transformer riser component and the second flow velocity of the pipe below the transformer riser scaling experimental platform are obtained.

[0115] The flow rate ratio is calculated using fluid dynamics calculations based on the first flow rate and the second flow rate.

[0116] When the ratio is equal to the flow rate ratio, it is determined that the preset transformer riser scaling ratio experimental platform and the transformer riser component have the same internal flow field distribution, and the test data is acquired.

[0117] If the ratio is not equal to the flow rate ratio, it is determined that the internal flow field distribution of the preset transformer riser scaling experimental platform and the transformer riser component is different, and the ratio between the flow rate of the transformer riser scaling experimental platform and the flow rate of the transformer riser component is re-evaluated.

[0118] As an improvement to the above solution, before acquiring the concentration change of impurity particles corresponding to each set of operating conditions within a preset time period through the acquisition device, the following method is further included:

[0119] The preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage. After the vacuum treatment is completed, the oil filling operation is performed on the first oil passage and the second oil passage using the oil filling tank.

[0120] After the oil injection operation is completed, the preset transformer height reduction ratio test platform uses the vacuum pump and the first oil passage and the second oil passage of the oil pump for circulation degassing.

[0121] After a first preset time, the preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage.

[0122] As an improvement to the above solution, after the preset transformer height-to-shortage ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage, it further includes:

[0123] The transformer height-to-shortage ratio test platform uses the oil pump to adjust the flow rate according to the operating conditions of each group.

[0124] The transformer height-to-shortage ratio test platform uses the bellows to adjust the temperature according to the operating conditions of each group.

[0125] The transformer height adjustment ratio test platform uses the high-voltage lead to adjust the voltage according to the voltage in each set of operating conditions.

[0126] The transformer rise-to-shortage ratio test platform uses the oil injection tank to adjust the initial concentration of impurity particles in each set of operating conditions; wherein, the oil injection tank contains impurity particles and transformer oil.

[0127] This embodiment acquires the operating conditions through a data acquisition module and receives the change in impurity particle concentration corresponding to each group of operating conditions within a preset time period from the transformer riser scaling experimental platform, obtained by the acquisition device. Finally, the data fitting module uses polynomial fitting to obtain the diffusion change data of impurity particles corresponding to temperature, voltage, and flow rate for each group of operating conditions under each group of operating conditions. This diffusion change data is then sent to the user terminal to monitor the diffusion change of impurity particle concentration in the transformer riser component under test. This embodiment simulates the actual structure of the transformer riser, allowing for more targeted study of the movement and aggregation of impurity particles within the riser, which is beneficial for determining whether the transformer riser is faulty based on the migration of impurity particles within it.

[0128] Example 3

[0129] See Figure 5 , Figure 5 This is a schematic diagram of the terminal device structure provided in an embodiment of the present invention.

[0130] One terminal device in this embodiment includes: a processor 501, a memory 502, and a computer program stored in the memory 502 and executable on the processor 501. When the processor 501 executes the computer program, it implements the steps of the aforementioned methods for monitoring the migration of various impurity particles in this embodiment, for example... Figure 1 All steps of the method for monitoring the migration of impurity particles shown. Alternatively, when the processor executes the computer program, it implements the functions of each module in the above-described apparatus embodiments, for example: Figure 2 All modules of the monitoring device for the migration of impurity particles are shown.

[0131] In addition, embodiments of the present invention also provide a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the monitoring method for impurity particle migration as described in any of the above embodiments.

[0132] Those skilled in the art will understand that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the diagram, or combine certain components, or different components. For example, the terminal device may also include input / output devices, network access devices, buses, etc.

[0133] The processor 501 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. The processor 501 is the control center of the terminal device, connecting various parts of the terminal device through various interfaces and lines.

[0134] The memory 502 can be used to store the computer programs and / or modules. The processor 501 implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, phonebook, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0135] Wherein, if the modules / units integrated in the terminal device are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, it can implement the steps of the various method embodiments described above. Wherein, the computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0136] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.

[0137] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for monitoring the migration of impurity particles, characterized in that, include: Several sets of operating conditions are acquired; wherein, the operating conditions include: initial concentration of impurity particles, temperature, voltage and flow rate; In a pre-set transformer riser scaling experimental platform, the concentration of impurity particles corresponding to each set of operating conditions within a preset time period is acquired by a data acquisition device. The transformer riser scaling experimental platform has the same internal flow field distribution as the original transformer riser component. The pre-set transformer riser scaling experimental platform is obtained by scaling the dimensional parameters of the original transformer riser component. The pre-set transformer riser scaling experimental platform includes: a vacuum pump, a high-voltage lead, an oil tank, a pressure gauge, an observation window, a flange, a first oil passage, a second oil passage, a bellows, an oil pump, a flow meter, an oil filling tank, a syringe, a ring, and a sampling hole. The first oil passage is connected to the high-voltage lead, the oil tank, the pressure gauge, the observation window, the flange, the syringe, the ring, and the sampling hole. The vacuum pump is connected to the oil tank. The second oil passage is connected to the bellows, the oil pump, the flow meter, and the oil filling tank. Based on the initial concentration, temperature, voltage, flow rate, and change in impurity particle concentration within a preset time under each set of operating conditions, polynomial fitting is used to obtain diffusion change data corresponding to temperature, voltage, and flow rate of impurity particles under each set of operating conditions within a preset time. This diffusion change data is then sent to the user terminal, enabling the user terminal to monitor the diffusion change of impurity particle concentration at several sampling points of the transformer riser component under test based on the received real-time initial concentration, real-time temperature, real-time voltage, and real-time flow rate. Before acquiring the concentration change of impurity particles corresponding to each set of operating conditions within a preset time period through the acquisition device, the method further includes: the preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage; after the vacuum treatment is completed, the oil filling operation is performed on the first oil passage and the second oil passage using the oil filling tank; after the oil filling operation is completed, the preset transformer height reduction ratio experimental platform uses the vacuum pump and the oil pump to perform circulating degassing treatment on the first oil passage and the second oil passage; after a first preset time, the preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage.

2. The method for monitoring the migration of impurity particles according to claim 1, characterized in that, Before acquiring the concentration change of impurity particles corresponding to each set of operating conditions within a preset time period through the acquisition device, the method further includes: determining the ratio between the flow velocity in the pipe below the transformer riser scaling experimental platform and the flow velocity in the pipe below the transformer riser component. When the preset internal flow field distribution of the transformer riser scaling experimental platform is the same as that of the transformer riser component, the first flow velocity of the pipe below the transformer riser component and the second flow velocity of the pipe below the transformer riser scaling experimental platform are obtained. The flow rate ratio is calculated using fluid dynamics calculations based on the first flow rate and the second flow rate. When the ratio is equal to the flow rate ratio, it is determined that the preset transformer riser scaling ratio experimental platform and the transformer riser component have the same internal flow field distribution, and the test data is acquired. If the ratio is not equal to the flow rate ratio, it is determined that the internal flow field distribution of the preset transformer riser scaling experimental platform and the transformer riser component is different, and the ratio between the flow rate of the transformer riser scaling experimental platform and the flow rate of the transformer riser component is re-evaluated.

3. The method for monitoring the migration of impurity particles according to claim 2, characterized in that, After the preset transformer height-to-shortage ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage, it further includes: The transformer height-to-shortage ratio test platform uses the oil pump to adjust the flow rate according to the operating conditions of each group. The transformer height-to-shortage ratio test platform uses the bellows to adjust the temperature according to the operating conditions of each group. The transformer height adjustment ratio test platform uses the high-voltage lead to adjust the voltage according to the voltage in each set of operating conditions. The transformer rise-to-shortage ratio test platform uses the oil injection tank to adjust the initial concentration of impurity particles in each set of operating conditions; wherein, the oil injection tank contains impurity particles and transformer oil.

4. A device for monitoring the migration of impurity particles, characterized in that, include: Data acquisition module, data collection module, and data fitting module; The data acquisition module is used to acquire several sets of operating conditions; wherein, the operating conditions include: initial concentration of impurity particles, temperature, voltage and flow rate; The data acquisition module is used to acquire the concentration change of impurity particles corresponding to each set of operating conditions within a preset time period in a preset transformer riser scaling experimental platform. The transformer riser scaling experimental platform has the same internal flow field distribution as the original transformer riser component. The preset transformer riser scaling experimental platform is obtained by scaling the dimensional parameters of the original transformer riser component. The preset transformer riser scaling experimental platform includes: a vacuum pump, a high-voltage lead, an oil tank, a pressure gauge, an observation window, a flange, a first oil passage, a second oil passage, a bellows, an oil pump, a flow meter, an oil filling tank, a syringe, a ring, and a sampling hole. The first oil passage is connected to the high-voltage lead, the oil tank, the pressure gauge, the observation window, the flange, the syringe, the ring, and the sampling hole. The vacuum pump is connected to the oil tank. The second oil passage is connected to the bellows, the oil pump, the flow meter, and the oil filling tank. The data fitting module is used to obtain diffusion change data of impurity particles corresponding to temperature, voltage, and flow rate of each set of operating conditions within a preset time by using polynomial fitting based on the initial concentration, temperature, voltage, flow rate, and change concentration of impurity particles within a preset time under each set of operating conditions. The diffusion change data is then sent to the user terminal so that the user terminal can monitor the diffusion change of impurity particle concentration at several sampling points of the riser component of the transformer under test based on the diffusion change data. Before acquiring the concentration change of impurity particles corresponding to each set of operating conditions within a preset time period through the acquisition device, the method further includes: the preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage; after the vacuum treatment is completed, the oil filling operation is performed on the first oil passage and the second oil passage using the oil filling tank; after the oil filling operation is completed, the preset transformer height reduction ratio experimental platform uses the vacuum pump and the oil pump to perform circulating degassing treatment on the first oil passage and the second oil passage; after a first preset time, the preset transformer height reduction ratio experimental platform uses the vacuum pump to perform vacuum treatment on the first oil passage and the second oil passage.

5. The monitoring device for impurity particle migration according to claim 4, characterized in that, Before acquiring the concentration change of impurity particles corresponding to each set of operating conditions within a preset time period through the acquisition device, the method further includes: determining the ratio between the flow velocity in the pipe below the transformer riser scaling experimental platform and the flow velocity in the pipe below the transformer riser component. When the preset internal flow field distribution of the transformer riser scaling experimental platform is the same as that of the transformer riser component, the first flow velocity of the pipe below the transformer riser component and the second flow velocity of the pipe below the transformer riser scaling experimental platform are obtained. The flow rate ratio is calculated using fluid dynamics calculations based on the first flow rate and the second flow rate. When the ratio is equal to the flow rate ratio, it is determined that the preset transformer riser scaling ratio experimental platform and the transformer riser component have the same internal flow field distribution, and the test data is acquired. If the ratio is not equal to the flow rate ratio, it is determined that the internal flow field distribution of the preset transformer riser scaling experimental platform and the transformer riser component is different, and the ratio between the flow rate of the transformer riser scaling experimental platform and the flow rate of the transformer riser component is re-evaluated.

6. A computer terminal device, characterized in that, The device includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements a method for monitoring the migration of impurity particles as described in any one of claims 1 to 3.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device on which the computer-readable storage medium is located to perform a method for monitoring the migration of impurity particles as described in any one of claims 1 to 3.

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