Oil-immersed transformer monitoring method, electronic device, and computer-readable storage medium

Abstract

The present application relates to an oil-immersed transformer monitoring method, electronic device, and computer-readable storage medium. The method monitors the oil temperature and dissolved gas content of the transformer oil of the oil-immersed transformer; transmits the monitored oil temperature and dissolved gas content in the transformer oil; generates an oil temperature change curve and a dissolved gas content change curve in the transformer oil based on the oil temperature and dissolved gas content in the transformer oil; determines whether the dissolved gas content in the transformer oil has a sudden change based on the dissolved gas content change curve, and if so, determines whether the oil-immersed transformer needs to be shut down; and determines whether testing is required based on the oil temperature change curve and the dissolved gas content change curve, and if so, generates and transmits a testing request. The method comprehensively considers the issues of oil temperature and dissolved gas content in the transformer oil changing over time, and analyzes the difference in dissolved gas content in the transformer oil at different oil temperatures.

Description

Technical Field

[0001] The present application relates to the field of oil-immersed transformers, and in particular to an oil-immersed transformer monitoring method, an electronic device, and a computer-readable storage medium. Background Art

[0002] Oil chromatography analysis is an important analytical technology for oil-immersed transformers. Traditional oil chromatography analysis has many processing steps, complex operations, and requires high operator skills; therefore, online monitoring technology for dissolved gases in oil has been developed.

[0003] Patent document CN113324816A discloses an online monitoring device and method for dissolved gas in transformer oil, belonging to the field of power equipment monitoring technology. The device includes a storage unit, an oil-gas separation unit, a detection unit, an elastic support unit, and a knocking unit. The storage unit is internally provided with a detection area and an oil-gas separation area, the detection area and the oil-gas separation area are interconnected, the detection unit is disposed within the detection area, the oil-gas separation unit is disposed within the oil-gas separation area, the elastic support unit and the knocking unit are both disposed within the oil-gas separation area, the elastic support unit is used to provide elastic support for the oil-gas separation unit, and the side wall of the storage unit is connected to an oil inlet pipe, which is used to transport transmission oil to the oil-gas separation unit for oil-gas separation. Compared with the prior art, this embodiment of the invention can improve the oil-gas separation effect and improve the accuracy and reliability of the detection results of the detection unit.

[0004] Patent document CN207336353U discloses an online monitoring device for dissolved gas in transformer oil, relating to the field of power equipment monitoring technology. The device comprises an oil inlet valve, an oil return valve, an oil temperature control unit, an oil circulation mechanism, an oil-gas separation unit, a gas detection unit, a main controller, a communication unit, an error compensation unit, and an input and display unit. The input and display unit inputs periodic offline detection data of dissolved gas in oil, which is processed by the main controller and then input into the error compensation unit. The error compensation unit compensates the online detection data of dissolved gas in oil based on the offline detection data. This allows for rapid on-site verification of the utility model's online monitoring device for dissolved gas in transformer oil, significantly improving the accuracy of the online monitoring data and avoiding false alarms caused by accumulated errors from long-term operation of the online monitoring device.

[0005] However, the monitoring technologies described in these patent documents, on the one hand, mainly focus on real-time monitoring and lack the adjustment of time changes. The transformer oil of oil-immersed transformers varies greatly during long-term use. On the other hand, they do not take into account the problem that the dissolved gas content in the transformer oil varies greatly at different oil temperatures. Summary of the Invention

[0006] Based on this, it is necessary to provide an oil-immersed transformer monitoring method, electronic equipment and computer-readable storage medium.

[0007] A method for monitoring an oil-immersed transformer comprises the following steps:

[0008] S200, monitors the oil temperature and dissolved gas content of the oil-immersed transformer;

[0009] S300, transmitting the monitored oil temperature and dissolved gas content in the transformer oil;

[0010] S400, generating an oil temperature variation curve and a dissolved gas content variation curve in the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil;

[0011] S500, judging whether the dissolved gas content in the transformer oil has a sudden change according to the dissolved gas content change curve in the transformer oil, if so, executing step S600, otherwise executing step S800;

[0012] S600, determining whether the oil-immersed transformer needs to be shut down, if yes, executing step S700, otherwise executing step S800;

[0013] S700, shut down the oil-immersed transformer;

[0014] S800, judging whether further testing is needed based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil, and if so, executing step S900;

[0015] S900: Generate and send a detection request.

[0016] The above-mentioned oil-immersed transformer monitoring method comprehensively considers the changes in oil temperature and dissolved gas content in transformer oil over time, and combines the analysis of the differences in dissolved gas content in transformer oil at different oil temperatures. It is conducive to making timely, effective and accurate monitoring results for oil-immersed transformers in long-term operation. It also combines real-time rapid response to sudden changes and curve comparison to determine whether further testing is needed. Therefore, it takes into account both rapid response to emergencies and maintaining the normal operation of the oil-immersed transformer when the problem is not serious, which is conducive to extending the normal service life of the oil-immersed transformer.

[0017] In one embodiment, step S200 includes: monitoring the oil temperature of the transformer oil of the oil-immersed transformer, and only when the oil temperature is higher than a temperature control threshold, monitoring the dissolved gas content in the transformer oil; and / or,

[0018] Before step S200, the oil-immersed transformer monitoring method further includes the following steps: S100, pre-setting at least one monitoring position inside the heat dissipation pipe of the transformer oil of the oil-immersed transformer; and, in step S200, monitoring the oil temperature of the transformer oil of the oil-immersed transformer and the dissolved gas content in the transformer oil at the monitoring position.

[0019] In one embodiment, in step S100, at least two monitoring positions are preset, and a certain interval is set between two adjacent monitoring positions so that the oil temperature of the transformer oil has a difference of at least 3 degrees Celsius.

[0020] In one embodiment, in step S400, when there are multiple gas contents in the transformer oil, a corresponding curve of the dissolved gas content in the transformer oil is generated for each gas; and / or,

[0021] In step S500, based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil, it is determined whether the dissolved gas content in the transformer oil has a sudden change in combination with the oil temperature change curve; and / or,

[0022] After step S700, proceed to step S800; and / or,

[0023] In step S800, based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil, it is determined whether further testing is required. If so, a test index value is assigned to the oil-immersed transformer, the test index value being used to reflect the problem status and test priority level of the oil-immersed transformer, and step S900 is executed. Furthermore, in step S900, a test requirement having the test index value is generated and sent; and / or,

[0024] After step S900, the oil-immersed transformer monitoring method further includes step S910: detecting the oil-immersed transformer; or, detecting the oil-immersed transformer according to the detection index value.

[0025] In one embodiment, in step S800, the oil temperature change curve of the current oil-immersed transformer and the dissolved gas content change curve in the transformer oil are compared based on historical data of the current oil-immersed transformer or similar oil-immersed transformers to determine whether further testing is needed.

[0026] Furthermore, in step S800, big data comparison is used on the server side to compare the oil temperature change curve of the current oil-immersed transformer and the dissolved gas content change curve in the transformer oil based on historical data of at least three oil-immersed transformers to determine whether further testing is needed.

[0027] In one embodiment, in step S800, based on the type of the current oil-immersed transformer, historical data of multiple oil-immersed transformers of the same type are compared horizontally. On the premise that the oil temperature change curves match, the differences in the dissolved gas content change curves in the transformer oil are compared. When the difference exceeds a preset threshold, it is determined that further testing is required; when the difference does not exceed the preset threshold, it is determined that further testing is not required.

[0028] In one embodiment, in step S200, the operating condition of the oil-immersed transformer is synchronously acquired;

[0029] In step S300, the working condition is synchronously transmitted;

[0030] In step S400, a working condition change curve is generated according to the working condition;

[0031] In step S800, whether further testing is required is determined based on the operating condition change curve, the oil temperature change curve, and the dissolved gas content change curve in the transformer oil.

[0032] In one embodiment, in step S200, the hydrogen content of dissolved gas in transformer oil is monitored.

[0033] In one embodiment, in step S200 , the content of acetylene, methane and / or carbon monoxide dissolved in the transformer oil is also monitored.

[0034] In one embodiment, an electronic device includes a memory and a processor, wherein the memory stores a computer program, and the processor implements any step of the oil-immersed transformer monitoring method when executing the computer program.

[0035] In one embodiment, a computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of any one of the oil-immersed transformer monitoring methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a flow chart of an embodiment of the oil-immersed transformer monitoring method described in this application.

[0038] Figure 2This is a flow chart of another embodiment of the oil-immersed transformer monitoring method described in this application.

[0039] Figure 3 This is a flow chart of another embodiment of the oil-immersed transformer monitoring method described in this application.

[0040] Figure 4 This is a flow chart of another embodiment of the oil-immersed transformer monitoring method described in this application.

[0041] Figure 5 This is a flow chart of another embodiment of the oil-immersed transformer monitoring method described in this application.

[0042] Figure 6 This is a flow chart of another embodiment of the oil-immersed transformer monitoring method described in this application.

[0043] Figure 7 This is a flow chart of another embodiment of the oil-immersed transformer monitoring method described in this application.

[0044] Figure 8 This is a flow chart of another embodiment of the oil-immersed transformer monitoring method described in this application.

[0045] Figure 9 This is a flow chart of another embodiment of the oil-immersed transformer monitoring method described in this application. DETAILED DESCRIPTION

[0046] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0047] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0049] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0051] The present application discloses a method for monitoring an oil-immersed transformer, which includes some or all of the steps of the following embodiments; that is, the method for monitoring an oil-immersed transformer includes some or all of the following technical features. In one embodiment of the present application, a method for monitoring an oil-immersed transformer includes the following steps: S200, monitoring the oil temperature of the transformer oil and the dissolved gas content in the transformer oil of the oil-immersed transformer; S300, transmitting the monitored oil temperature and the dissolved gas content in the transformer oil; S400, generating an oil temperature change curve and a dissolved gas content change curve in the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil; S500, judging whether a sudden change occurs in the dissolved gas content in the transformer oil according to the dissolved gas content change curve in the transformer oil, and if so, executing step S600, otherwise executing step S800; S600, judging whether it is necessary to shut down the oil-immersed transformer, and if so, executing step S700, otherwise executing step S800; S700, shutting down the oil-immersed transformer; S800, judging whether further testing is required according to the oil temperature change curve and the dissolved gas content change curve in the transformer oil, and if so, executing step S900; S900, generating and sending a testing requirement. The above-mentioned oil-immersed transformer monitoring method comprehensively considers the changes in oil temperature and dissolved gas content in transformer oil over time, and combines the analysis of the differences in dissolved gas content in transformer oil at different oil temperatures. It is conducive to making timely, effective and accurate monitoring results for oil-immersed transformers in long-term operation. It also combines real-time rapid response to sudden changes and curve comparison to determine whether further testing is needed. Therefore, it takes into account both rapid response to emergencies and maintaining the normal operation of the oil-immersed transformer when the problem is not serious, which is conducive to extending the normal service life of the oil-immersed transformer.

[0052] In one embodiment of the present application, a method for monitoring an oil-immersed transformer is as follows: Figure 1As shown, it includes the following steps: S200, monitoring the oil temperature of the transformer oil of the oil-immersed transformer and the dissolved gas content in the transformer oil; S300, transmitting the oil temperature and the dissolved gas content in the transformer oil obtained by monitoring; S400, generating an oil temperature change curve and a dissolved gas content change curve in the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil; S500, judging whether the dissolved gas content in the transformer oil has a sudden change according to the dissolved gas content change curve, if so, executing step S600, otherwise executing step S800; S600, judging whether it is necessary to shut down the oil-immersed transformer, if so, executing step S700, otherwise executing step S800; S700, shutting down the oil-immersed transformer; S800, judging whether further detection is needed according to the oil temperature change curve and the dissolved gas content change curve in the transformer oil, if so, executing step S900, otherwise ending; S900, generating and sending a detection request. Furthermore, after submitting the inspection request, the oil-immersed transformer monitoring method further includes the step of generating a work order in the business expansion system and issuing it to the inspector. This design improves efficiency from problem discovery to problem resolution, ensuring the normal operation of the oil-immersed transformer. Because problems are discovered and resolved quickly, it also helps extend the normal service life of the oil-immersed transformer.

[0053] In one embodiment, before step S200, the oil-immersed transformer monitoring method further includes the following steps: S100, pre-setting at least one monitoring position inside the heat dissipation pipe of the transformer oil of the oil-immersed transformer; and in step S200, monitoring the oil temperature of the transformer oil of the oil-immersed transformer and the dissolved gas content in the transformer oil at the monitoring position. In one embodiment of the present application, a method for monitoring an oil-immersed transformer is as follows: Figure 2As shown, the method comprises the following steps: S100, presetting at least one monitoring position inside a heat dissipation pipe of transformer oil of an oil-immersed transformer; S200, monitoring the oil temperature of the transformer oil of the oil-immersed transformer and the content of dissolved gas in the transformer oil at the monitoring position; S300, transmitting the monitored oil temperature and the content of dissolved gas in the transformer oil; S400, generating an oil temperature change curve and a transformer oil dissolved gas content change curve according to the oil temperature and the content of dissolved gas in the transformer oil; S500, generating an oil temperature change curve and a transformer oil dissolved gas content change curve according to the content of dissolved gas in the transformer oil. The gas content change curve is analyzed to determine whether the dissolved gas content in the transformer oil has a sudden change. If so, step S600 is executed; otherwise, step S800 is executed. S600 determines whether the oil-immersed transformer needs to be shut down. If so, step S700 is executed; otherwise, step S800 is executed. S700 shuts down the oil-immersed transformer. S800 determines whether further testing is required based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil. If so, step S900 is executed; otherwise, the process ends. S900 generates and sends a testing request. Furthermore, the oil-immersed transformer has a heat dissipation tank separated from the main body for heat dissipation, and a delivery pipeline connecting the main body and the heat dissipation tank. The heat dissipation tank can dissipate heat from the transformer oil by natural cooling, air cooling, or water cooling. The monitoring position is located inside the heat dissipation tank.

[0054] Further, in one embodiment, in step S100, at least two monitoring positions are preset, and two adjacent monitoring positions have a certain interval so that the oil temperature of the transformer oil differs by at least 2 degrees Celsius. In one embodiment, in step S100, at least two monitoring positions are preset, and two adjacent monitoring positions have a certain interval so that the oil temperature of the transformer oil differs by at least 3 degrees Celsius. In one embodiment, in step S100, at least three monitoring positions are preset, and two adjacent monitoring positions have a certain interval so that the oil temperature of the transformer oil differs by at least 3 degrees Celsius. In one embodiment of the present application, a method for monitoring an oil-immersed transformer is as follows: Figure 3As shown, it includes the following steps: S100, pre-setting at least two monitoring positions inside the heat dissipation pipe of the transformer oil of the oil-immersed transformer, and a certain interval between two adjacent monitoring positions so that the oil temperature of the transformer oil has a difference of at least 3 degrees Celsius; S200, monitoring the oil temperature of the transformer oil and the dissolved gas content in the transformer oil at the monitoring positions; S300, transmitting the monitored oil temperature and the dissolved gas content in the transformer oil; S400, generating an oil temperature change curve and a dissolved gas content curve of the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil. The oil-immersed transformer is configured to be a transformer oil-immersed oil-gas-content-change curve. Step S500 determines whether a sudden change in the dissolved gas content in the transformer oil occurs based on the dissolved gas content change curve. If so, execute step S600; otherwise, execute step S800. Step S600 determines whether the oil-immersed transformer needs to be shut down. If so, execute step S700; otherwise, execute step S800. Step S700 shuts down the oil-immersed transformer. Step S800 determines whether further testing is required based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil. If so, execute step S900; otherwise, terminate. Step S900 generates and sends a testing request. Furthermore, the oil-immersed transformer includes a heat dissipation tank separated from the main body for heat dissipation, and a delivery pipe connecting the main body and the heat dissipation tank. The heat dissipation tank can dissipate heat from the transformer oil by natural cooling, air cooling, or water cooling. One of the monitoring locations is located within the delivery pipe from the main body to the heat dissipation tank, and at least one of the monitoring locations is located within the heat dissipation tank. Furthermore, one of the monitoring positions is set inside the delivery pipe from the main body to the heat dissipation oil tank, the other monitoring position is set inside the delivery pipe from the heat dissipation oil tank to the main body, and at least one of the monitoring positions is set inside the heat dissipation oil tank. With such a design, the oil temperature of the transformer oil at two adjacent monitoring positions differs by at least 3 degrees Celsius, which is conducive to forming monitoring points with a temperature gradient, reflecting the dissolved gas content in the transformer oil at different oil temperatures, and providing corresponding oil temperature data to the analysis side, such as the server side, so that the dissolved gas content in the transformer oil can be analyzed in combination with the oil temperature. Therefore, the analysis of the difference in the dissolved gas content in the transformer oil at different oil temperatures is combined, thereby improving the timeliness and accuracy of monitoring of oil-immersed transformers in long-term operation.

[0055] In one embodiment, in step S200, the oil temperature of the transformer oil of the oil-immersed transformer and the dissolved gas content in the transformer oil are monitored; in one embodiment, step S200 includes: monitoring the oil temperature of the transformer oil of the oil-immersed transformer, and monitoring the dissolved gas content in the transformer oil only when the oil temperature is higher than the temperature control threshold; that is, the dissolved gas content in the transformer oil is monitored only under specific conditions. Further, the temperature control threshold is the oil temperature of the transformer oil under normal operating conditions of the oil-immersed transformer; or the temperature control threshold is 2 to 5 degrees Celsius higher than the oil temperature of the transformer oil under normal operating conditions of the oil-immersed transformer. In one embodiment, in step S200, the hydrogen content of the dissolved gas in the transformer oil is monitored, that is, the dissolved gas content in the transformer oil is the hydrogen content. In one embodiment of the present application, a method for monitoring an oil-immersed transformer is as follows: Figure 4 As shown, it includes the following steps: S200, monitoring the oil temperature and dissolved gas content in the transformer oil of the oil-immersed transformer, wherein the dissolved gas content in the transformer oil is hydrogen content; S300, transmitting the monitored oil temperature and dissolved gas content in the transformer oil; S400, generating an oil temperature change curve and a dissolved gas content change curve in the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil; S500, judging whether the dissolved gas content in the transformer oil has a sudden change according to the dissolved gas content change curve, if so, executing step S600, otherwise executing step S800; S600, judging whether it is necessary to shut down the oil-immersed transformer, if so, executing step S700, otherwise executing step S800; S700, shutting down the oil-immersed transformer; S800, judging whether further detection is required according to the oil temperature change curve and the dissolved gas content change curve in the transformer oil, if so, executing step S900, otherwise ending; S900, generating and sending a detection request. Furthermore, at the monitoring location, a temperature sensor is used to monitor the oil temperature of the oil-immersed transformer, and an automatic monitoring device, such as an electrochemical gas sensor and / or a carrier catalytic sensitive element detector, is used to monitor the dissolved gas content in the transformer oil. This design automatically monitors indicators such as oil temperature and dissolved gas content within the oil tank, enabling direct acquisition of internal temperature data and oil chromatographic data. This not only improves the accuracy of these indicators, but also enables real-time monitoring, transmission, and analysis of data, thereby improving the timeliness of problem detection and helping to protect the oil-immersed transformer by preventing transformer failure or even damage due to untimely problem detection.

[0056] In one embodiment, in step S200, the content of acetylene, methane and / or carbon monoxide dissolved in the transformer oil is also monitored. In one embodiment of the present application, a method for monitoring an oil-immersed transformer is as follows: Figure 5As shown, it includes the following steps: S200, monitoring the oil temperature and dissolved gas content in the transformer oil of the oil-immersed transformer, wherein the dissolved gas content in the transformer oil includes hydrogen, acetylene, methane and carbon monoxide; S300, transmitting the monitored oil temperature and dissolved gas content in the transformer oil; S400, generating an oil temperature change curve and a dissolved gas content change curve in the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil; S500, judging whether the dissolved gas content in the transformer oil has a sudden change according to the dissolved gas content change curve, if so, executing step S600, otherwise executing step S800; S600, judging whether it is necessary to shut down the oil-immersed transformer, if so, executing step S700, otherwise executing step S800; S700, shutting down the oil-immersed transformer; S800, judging whether further testing is required according to the oil temperature change curve and the dissolved gas content change curve in the transformer oil, if so, executing step S900, otherwise ending; S900, generating and sending a testing request.

[0057] In one embodiment, in step S300, the monitored oil temperature and the dissolved gas content in the transformer oil are transmitted; further, in step S300, the monitored oil temperature and the dissolved gas content in the transformer oil are transmitted to a server; further, in step S300, the monitored oil temperature and the dissolved gas content in the transformer oil are transmitted in real time; when the dissolved gas content in the transformer oil includes hydrogen, acetylene, methane and carbon monoxide content, the monitored oil temperature and the dissolved gas content in the transformer oil are transmitted in real time, wherein the dissolved gas content in the transformer oil includes hydrogen, acetylene, methane and carbon monoxide content. Monitoring the dissolved gas content in transformer oil primarily relies on the capabilities of instrumentation. Because the instrument must be placed in a sealed tank for long-term monitoring, it is difficult to maintain. While ideally, monitoring as many gas components as possible is preferable, practical implementation is challenging due to cost, size, and service life. These factors limit the ability to monitor dissolved gas content in transformer oil. Domestic instrumentation performs well in hydrogen monitoring, but reliable equipment for monitoring acetylene, methane, carbon monoxide, ethane, ethylene, and other hydrocarbon gases is typically imported, with limited domestic alternatives. Transmitting the monitored oil temperature and dissolved gas content to a server and performing analysis on the server facilitates integration with large databases, improving analysis efficiency and accuracy.

[0058] In one embodiment, in step S400, an oil temperature variation curve and a dissolved gas content variation curve in the transformer oil are generated according to the oil temperature and the dissolved gas content in the transformer oil; in one embodiment, in step S400, when there are multiple dissolved gas contents in the transformer oil, a corresponding dissolved gas content variation curve in the transformer oil is generated for each gas. In one embodiment of the present application, a method for monitoring an oil-immersed transformer is provided. Figure 6 As shown, it includes the following steps: S200, monitoring the oil temperature of the transformer oil of the oil-immersed transformer and the dissolved gas content in the transformer oil; S300, transmitting the oil temperature and the dissolved gas content in the transformer oil obtained by monitoring; S400, generating an oil temperature change curve and a dissolved gas content change curve in the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil, wherein when there are multiple gas contents in the transformer oil, a corresponding dissolved gas content change curve in the transformer oil is generated for each gas; S500, generating an oil temperature change curve and a dissolved gas content change curve in the transformer oil according to the transformer oil temperature and the dissolved gas content in the transformer oil; Based on the dissolved gas content change curve in the transformer oil, determine whether the dissolved gas content in the transformer oil has a sudden change. If so, execute step S600; otherwise, execute step S800. At step S600, determine whether the oil-immersed transformer needs to be shut down. If so, execute step S700; otherwise, execute step S800. At step S700, shut down the oil-immersed transformer. At step S800, determine whether further testing is required based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil. If so, execute step S900; otherwise, terminate. At step S900, generate and send a testing request. If the dissolved gas content in the transformer oil includes hydrogen, acetylene, methane, and carbon monoxide, hydrogen, acetylene, methane, and carbon monoxide content change curves are generated, respectively. In each embodiment, the curve is formed by fitting using a mathematical method. There are many specific algorithms, which are not the innovation of the present application and are omitted here. The curve includes an oil temperature change curve and a dissolved gas content change curve in the transformer oil. The dissolved gas content change curve in the transformer oil includes a hydrogen change curve, an acetylene change curve, a methane change curve, and a carbon monoxide content change curve.

[0059] In one embodiment, in step S500, a determination is made based on the dissolved gas content change curve in the transformer oil to determine whether a sudden change in the dissolved gas content has occurred. If so, step S600 is executed; otherwise, step S800 is executed. In one embodiment, in step S500, a determination is made based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil, combined with the oil temperature change curve, to determine whether a sudden change in the dissolved gas content has occurred in the transformer oil. For example, if a change in oil temperature corresponds to a change in the dissolved gas content in the transformer oil, and if a sudden change in the dissolved gas content in the transformer oil has occurred without a sudden change in the oil temperature, a problem is likely to have occurred, and it is necessary to determine whether the oil-immersed transformer needs to be shut down. Furthermore, in step S500, a determination is made based on the oil temperature change curve to determine whether a sudden change in the transformer oil temperature has occurred. If so, step S600 is executed. Specifically, if either determination result in step S500 is yes, step S600 is executed; if both determination results are no, step S800 is executed. Sudden changes often signal a critical and urgent situation. For example, if the hydrogen content in the transformer oil suddenly increases from 55 μL / L to 100 μL / L, or if the acetylene content suddenly increases from a trace amount to 5 μL / L, this indicates an internal transformer problem. In this case, historical data or other pre-set criteria must be combined to determine whether the oil-immersed transformer needs to be shut down to protect it and prevent the internal problem from becoming more serious and causing damage or a production accident.

[0060] In one embodiment, in step S600, it is determined whether the oil-immersed transformer needs to be shut down. If so, step S700 is executed; otherwise, step S800 is executed. In one embodiment, in step S700, the oil-immersed transformer is shut down. In one embodiment, after step S700, step S800 is continued to be executed, that is, after shutting down the oil-immersed transformer, further testing is continued based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil to determine whether further testing is required. If so, step S900 is executed. Furthermore, in step S600, whether the oil-immersed transformer needs to be shut down is determined based on big data, such as historical data. It is also possible to determine whether the oil-immersed transformer needs to be shut down based on pre-set judgment basis or judgment conditions. On the one hand, the oil-immersed transformer work manual can be used as a pre-set judgment basis or judgment condition. On the other hand, historical data, especially a big data system that integrates a large amount of data, such as a big database, can be used to determine whether the oil-immersed transformer needs to be shut down.

[0061] In one embodiment, in step S800, whether further testing is required is determined based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil, and if so, step S900 is executed. In one embodiment, in step S800, whether further testing is required is determined based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil, based on historical data of the current oil-immersed transformer or similar oil-immersed transformers. In one embodiment, in step S800, whether further testing is required is determined based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil, and if so, a test index value is assigned to the oil-immersed transformer, the test index value being used to reflect the problem status and test priority level of the oil-immersed transformer, and step S900 is executed. Furthermore, in step S900, a test request with the test index value is generated and sent. This design facilitates the management and maintenance of a large number of oil-immersed transformers, especially when maintenance capacity is limited and a priority order for urgent or important inspections is required. The impact of severe weather on a large number of transformers often creates a significant demand for inspections, necessitating the design of inspection indicators that reflect the problematic conditions and inspection priorities of the oil-immersed transformers. Following step S900, the oil-immersed transformer monitoring method further includes step S910: inspecting the oil-immersed transformer; or, for embodiments with inspection indicator values, further includes step S910: inspecting the oil-immersed transformer based on the inspection indicator values.

[0062] Furthermore, in one embodiment, in step S800, a big data comparison is used on the server side to compare the oil temperature change curve of the current oil-immersed transformer and the dissolved gas content change curve in the transformer oil based on the historical data of at least three oil-immersed transformers to determine whether further testing is needed. In one embodiment of the present application, a method for monitoring an oil-immersed transformer is as follows: Figure 7As shown, the method includes the following steps: S200, monitoring the oil temperature and dissolved gas content of the transformer oil of the oil-immersed transformer; S300, transmitting the monitored oil temperature and dissolved gas content in the transformer oil; S400, generating an oil temperature change curve and a transformer oil dissolved gas content change curve based on the oil temperature and the transformer oil dissolved gas content; S500, judging whether the dissolved gas content in the transformer oil has a sudden change based on the transformer oil dissolved gas content change curve, and if so, executing step S600. Otherwise, execute step S800; S600, determine whether the oil-immersed transformer needs to be shut down. If yes, execute step S700; otherwise, execute step S800; S700, shut down the oil-immersed transformer; S800, use big data comparison on the server side to compare the oil temperature change curve and the dissolved gas content change curve of the current oil-immersed transformer based on the historical data of at least three oil-immersed transformers to determine whether further testing is required. If yes, execute step S900; otherwise, end; S900, generate and send a testing request. In one embodiment, in step S800, based on the type of the current oil-immersed transformer, compare the historical data of multiple oil-immersed transformers of the same type horizontally. On the premise that the oil temperature change curves match, compare the differences in the dissolved gas content change curves in the transformer oil. When the difference exceeds a preset threshold, it is determined that further testing is required; when the difference does not exceed the preset threshold, it is determined that further testing is not required. Furthermore, the need for further testing is determined based on the trends of the oil temperature curve, the trends of the dissolved gas content curve in the transformer oil, and the degree of agreement between the two, combined with historical data from the big data. This design ensures that the judgment results are as consistent as possible with actual needs. This avoids wasting resources needed for further testing while also preventing the missed detection of dangerous issues that truly require further testing. This improves the accuracy of identifying issues that truly require enhanced testing while conserving resources. This is a strategic choice, also known as a game, because resources are always limited, while problems are endless. Therefore, they need to be allocated rationally to avoid waste, yet accurate enough to avoid misjudging important issues.

[0063] In one embodiment, in step S900, a detection requirement is generated and sent. Furthermore, in one embodiment, in step S200, the working condition of the oil-immersed transformer is synchronously acquired; in step S300, the working condition is synchronously transmitted; in step S400, a working condition change curve is also generated according to the working condition; in step S800, whether further detection is required is determined based on the working condition change curve, the oil temperature change curve and the dissolved gas content change curve in the transformer oil. In one embodiment of the present application, a method for monitoring an oil-immersed transformer is as follows: Figure 8As shown, it includes the following steps: S200, monitoring the oil temperature of the transformer oil of the oil-immersed transformer and the dissolved gas content in the transformer oil, and synchronously obtaining the working condition of the oil-immersed transformer; S300, transmitting the monitored oil temperature and the dissolved gas content in the transformer oil, and synchronously transmitting the working condition; S400, generating an oil temperature change curve and a dissolved gas content change curve in the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil, and also generating a working condition change curve according to the working condition; S500, generating a working condition change curve according to the dissolved gas content change in the transformer oil. The oil-immersed transformer is then shut down based on the operating condition curve, the oil temperature curve, and the dissolved gas content curve. If so, the oil-immersed transformer oil content is determined to have a sudden change. If so, step S600 is executed; otherwise, step S800 is executed. At step S700, the oil-immersed transformer is shut down. At step S800, further testing is determined based on the operating condition curve, the oil temperature curve, and the dissolved gas content curve. If so, step S900 is executed; otherwise, the process ends. At step S900, a testing request is generated and sent. The operating condition of an oil-immersed transformer is also an indicator worthy of study. Under different operating conditions, such as different loads, the transformer oil temperature varies. If a high oil temperature, typically seen at high loads, occurs at low loads, this indicates a problem within the transformer. Whether further manual testing is necessary can be determined after comprehensive evaluation and analysis.

[0064] In one embodiment of the present application, a method for monitoring an oil-immersed transformer is as follows: Figure 9As shown, it includes the following steps: S100, pre-setting at least two monitoring positions inside the heat dissipation pipe of the transformer oil of the oil-immersed transformer; S200, monitoring the oil temperature of the transformer oil and the dissolved gas content in the transformer oil of the oil-immersed transformer at the two monitoring positions, and synchronously obtaining the working condition of the oil-immersed transformer; S300, transmitting the monitored oil temperature and the dissolved gas content in the transformer oil, and synchronously transmitting the working condition; S400, generating an oil temperature change curve and a transformer oil dissolved gas content change curve according to the oil temperature and the dissolved gas content in the transformer oil, and generating a working condition change curve according to the working condition. curve; S500, judging whether the dissolved gas content in the transformer oil has a sudden change based on the dissolved gas content change curve; if so, executing step S600; otherwise, executing step S800; S600, judging whether the oil-immersed transformer needs to be shut down; if so, executing step S700; otherwise, executing step S800; S700, shutting down the oil-immersed transformer; S800, judging whether further testing is required based on the operating condition change curve, the oil temperature change curve, and the dissolved gas content change curve in the transformer oil; if so, executing step S900; otherwise, ending; S900, generating and sending a testing request. The remaining embodiments are similar and will not be described in detail.

[0065] In one embodiment, an oil-immersed transformer is implemented using the oil-immersed transformer monitoring method described in any embodiment. Alternatively, an oil-immersed transformer has a functional module for executing the oil-immersed transformer monitoring method described in any embodiment. In one embodiment, an oil-immersed transformer includes: a monitoring module for monitoring the oil temperature and dissolved gas content of the transformer oil of the oil-immersed transformer; a transmission module for transmitting the monitored oil temperature and dissolved gas content in the transformer oil; a curve generation module for generating an oil temperature change curve and a dissolved gas content change curve in the transformer oil based on the oil temperature and dissolved gas content in the transformer oil; a first judgment module for judging whether a sudden change occurs in the dissolved gas content in the transformer oil based on the dissolved gas content change curve in the transformer oil; a control module for shutting down the oil-immersed transformer when it is judged that the oil-immersed transformer needs to be shut down; a second judgment module for judging whether further testing is required based on the oil temperature change curve and the dissolved gas content change curve in the transformer oil; and a detection requirement module for generating and sending a detection requirement. The remaining embodiments are similar and will not be described in detail. Such a design comprehensively considers the changes in oil temperature over time and the changes in the dissolved gas content in transformer oil over time, and combines the analysis of the differences in dissolved gas content in transformer oil at different oil temperatures, which is conducive to timely, effective and accurate monitoring results for oil-immersed transformers in long-term operation. It also combines real-time rapid response to sudden changes and curve comparison to determine whether further testing is needed. Therefore, it takes into account both rapid response to emergencies and maintaining normal operation of the oil-immersed transformer when the problem is not serious, which is conducive to extending the normal service life of the oil-immersed transformer.

[0066] In one embodiment, an electronic device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the oil-immersed transformer monitoring method described in any embodiment are implemented. The electronic device may also be referred to as a device or an electronic control device. In one embodiment, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the oil-immersed transformer monitoring method described in each of the above embodiments are implemented.

[0067] In one embodiment, a computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the oil-immersed transformer monitoring method described in any embodiment. A person skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the above-described method embodiments. Any reference to memory, storage, database, or other media used in the embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0068] It should be noted that other embodiments of the present application also include an oil-immersed transformer monitoring method, electronic device and computer-readable storage medium that can be implemented by combining the technical features in the above embodiments; in each embodiment, the oil-immersed transformer monitoring method can also be called an oil-immersed transformer supervision and control method, and the electronic device can also be called an electronic control device.

[0069] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A method for monitoring an oil-immersed transformer, characterized in that: Including steps: S200, monitors the oil temperature and dissolved gas content of the oil-immersed transformer; S300, transmitting the monitored oil temperature and dissolved gas content in the transformer oil; S400, generating an oil temperature variation curve and a dissolved gas content variation curve in the transformer oil according to the oil temperature and the dissolved gas content in the transformer oil; S500, judging whether the dissolved gas content in the transformer oil has a sudden change according to the dissolved gas content change curve in the transformer oil, if so, executing step S600, otherwise executing step S800; S600, determining whether the oil-immersed transformer needs to be shut down, if yes, executing step S700, otherwise executing step S800; S700, shut down the oil-immersed transformer; S800, judging whether further testing is required based on the oil temperature variation curve and the dissolved gas content variation curve in the transformer oil, and if so, assigning a testing index value to the oil-immersed transformer, the testing index value being used to reflect the problem status and testing priority level of the oil-immersed transformer, and executing step S900; wherein, in step S800, big data comparison is used on the server side to compare the oil temperature variation curve and the dissolved gas content variation curve in the transformer oil of the current oil-immersed transformer based on historical data of at least three oil-immersed transformers, to judge whether further testing is required; S900: Generate and send a detection requirement with the detection index value.

2. The oil-immersed transformer monitoring method according to claim 1, characterized in that: Step S200 includes: monitoring the oil temperature of the transformer oil of the oil-immersed transformer, and monitoring the dissolved gas content in the transformer oil only when the oil temperature is higher than a temperature control threshold.

3. The oil-immersed transformer monitoring method according to claim 2, characterized in that: Before step S200, the oil-immersed transformer monitoring method further includes the following steps: S100, pre-setting at least one monitoring position inside the heat dissipation pipe of the transformer oil of the oil-immersed transformer; and, in step S200, monitoring the oil temperature of the transformer oil of the oil-immersed transformer and the dissolved gas content in the transformer oil at the monitoring position.

4. The oil-immersed transformer monitoring method according to claim 3, characterized in that: In step S100, at least two monitoring positions are pre-set, and a certain distance is left between two adjacent monitoring positions so that the oil temperature of the transformer oil differs by at least 3 degrees Celsius. The oil-immersed transformer has a heat dissipation oil tank separated from the main body for heat dissipation, and a delivery pipe connecting the main body and the heat dissipation oil tank. The heat dissipation oil tank dissipates heat from the transformer oil by natural cooling, air cooling, or water cooling. One of the monitoring positions is set inside the delivery pipe from the main body to the heat dissipation oil tank, and at least one of the monitoring positions is set inside the heat dissipation oil tank.

5. The oil-immersed transformer monitoring method according to claim 1, characterized in that: In step S400, when there are multiple gas contents in the transformer oil, a corresponding change curve of the dissolved gas content in the transformer oil is generated for each gas.

6. The oil-immersed transformer monitoring method according to claim 1, characterized in that: In step S500, based on the oil temperature variation curve and the dissolved gas content variation curve in the transformer oil, it is determined whether a sudden change occurs in the dissolved gas content in the transformer oil in combination with the oil temperature variation curve.

7. The oil-immersed transformer monitoring method according to claim 1, characterized in that: After step S700 , the process proceeds to step S800 .

8. The oil-immersed transformer monitoring method according to claim 1, characterized in that: After step S900, the oil-immersed transformer monitoring method further includes step S910: detecting the oil-immersed transformer; or, detecting the oil-immersed transformer according to the detection index value.

9. The oil-immersed transformer monitoring method according to claim 1, characterized in that: In step S800, the oil temperature change curve of the current oil-immersed transformer and the dissolved gas content change curve in the transformer oil are compared based on historical data of the current oil-immersed transformer or similar oil-immersed transformers to determine whether further testing is needed.

10. The oil-immersed transformer monitoring method according to claim 9, characterized in that: In step S800, based on the type of the current oil-immersed transformer, historical data of multiple oil-immersed transformers of the same type are compared horizontally. On the premise that the oil temperature change curves match, the differences in the dissolved gas content change curves in the transformer oil are compared. When the difference exceeds a preset threshold, it is determined that further testing is required; when the difference does not exceed the preset threshold, it is determined that no further testing is required.

11. The oil-immersed transformer monitoring method according to any one of claims 1 to 10, characterized in that: In step S200, the hydrogen content of the dissolved gas in the transformer oil is monitored.

12. The oil-immersed transformer monitoring method according to claim 11, characterized in that: In step S200 , the content of acetylene, methane and / or carbon monoxide in the dissolved gas in the transformer oil is also monitored.

13. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the oil-immersed transformer monitoring method according to any one of claims 1 to 12 are implemented.

14. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the oil-immersed transformer monitoring method according to any one of claims 1 to 12 are implemented.

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