Method and system for determining validity of online monitoring data of dissolved gas in transformer oil

Abstract

The present invention belongs to the field of transformer operation and maintenance, and provides a method and system for determining the validity of online monitoring data of dissolved gas in transformer oil, including obtaining real-time online monitoring data of the transformer; determining the gas content based on the real-time online monitoring data of the transformer; if the gas content is greater than a set value, connecting a detector, otherwise filtering the data to obtain screened online monitoring data; determining whether the screened online monitoring data is correct based on the screened online monitoring data; determining whether multiple hydrocarbon hydrogens in the correct online monitoring data have positive and negative changes at the same time based on the correct online monitoring data; if not, determining that the correct online monitoring data is valid; and determining that only the online monitoring data of dissolved gas in transformer oil can be used for determination, and that situations such as device data being invalid, device data being interrupted, data being wrong, device lacking carrier gas, and device detection data being inaccurate can be accurately determined.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformer operation and maintenance, and in particular relates to a method and system for determining the validity of online monitoring data of dissolved gas in transformer oil. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Online monitoring of dissolved gas in oil is one of the most important means of daily maintenance of transformers. It can promptly detect defects such as transformer overheating and discharge, and prompt operation and maintenance personnel to take targeted measures in time to avoid transformer failure.

[0004] However, due to the limitations of the current development status of online monitoring technology for dissolved gas in oil and the actual quality level of the device, many problems such as data interruption, inaccurate data, and drastic data fluctuations often occur during the operation of the device. It is impossible to reflect the actual dissolved gas content in the transformer oil in real time and cannot achieve the expected monitoring effect.

[0005] Therefore, the validity of the online monitoring data of dissolved gas in oil is not accurately determined, and the abnormality of the online monitoring device of dissolved gas in oil cannot be discovered in time, resulting in false alarms of the transformer. Summary of the invention

[0006] In order to solve the above problems, the present invention proposes a method and system for determining the validity of online monitoring data of dissolved gas in transformer oil. The present invention can timely detect more than 95% of chromatographic device abnormalities, effectively improve the quality of online monitoring data of dissolved gas in oil, and improve the accuracy of dissolved gas alarm in transformer oil.

[0007] According to some embodiments, a first solution of the present invention provides a method for determining the validity of online monitoring data of dissolved gas in transformer oil, which adopts the following technical solution:

[0008] A method for determining the validity of online monitoring data of dissolved gas in transformer oil, comprising:

[0009] Obtain real-time online monitoring data of transformers and obtain gas data in transformer oil;

[0010] Determining the gas content based on the gas data in the transformer oil;

[0011] If the gas content is not empty and greater than zero, the data correctness is determined based on the screened gas data in the transformer oil, otherwise the stability of the monitoring device is determined;

[0012] Based on the gas data in the transformer oil after screening, determine whether it is consistent with the previous monitoring data, if not consistent, determine whether the sum of hydrogen, carbon monoxide and carbon dioxide in the gas data in the transformer oil after screening is zero;

[0013] If it is not zero, then determine whether the calculated total hydrocarbons in the gas data in the screened transformer oil are equal to the total hydrocarbon value of the real-time data; if they are equal, then determine that the gas data in the screened transformer oil is correct;

[0014] Based on the correct data on gas in transformer oil, it is determined whether the contents of hydrocarbons and hydrogen in the correct data on gas in transformer oil have both positive and negative changes and whether the contents of carbon monoxide and carbon dioxide have changed; if not, it is determined that the correct data on gas in transformer oil is valid.

[0015] Furthermore, the stability determination of the monitoring device is specifically as follows:

[0016] Continuously collect real-time online monitoring data of transformers within the specified monitoring period;

[0017] For devices that have not uploaded valid data for three consecutive specified monitoring cycles, an abnormal device warning will be issued.

[0018] Furthermore, the gas data in the transformer oil includes H 2 , CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 ,CO,CO 2 , real-time data total hydrocarbon value;

[0019] The real-time data total hydrocarbon value specifically includes: CH 4 , C 2 H 6 , C 2 H 4 and C 2 H 2 sum.

[0020] Furthermore, whether the contents of hydrocarbons and hydrogen in the correct gas data in the transformer oil have both positive and negative changes and whether the contents of carbon monoxide and carbon dioxide have changed, specifically:

[0021] CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2and hydrogen, whether any two of them have positive and negative changes at the same time, and CO, CO 2 whether they change simultaneously; or

[0022] CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 Do any three hydrocarbons in hydrogen have positive and negative changes at the same time, and CO, CO 2 whether any changes; or

[0023] CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 Do any four hydrocarbons in hydrogen have positive and negative changes at the same time?

[0024] Furthermore, if the gas content is not empty and is greater than zero, specifically:

[0025] [c(H 2 )!=null and c(CH 4 ) !=null and c(C 2 H 6 ) !=null and c(C 2 H 4 ) !=nulland c(C 2 H 2 ) !=null and c(CO)!=null and c(CO 2 )!=null] and c(H 2 )>=0 and c(CH 4 )>=0and c(C 2 H 6 )>=0 and c(C 2 H 4 )>=0 and c(C 2 H 2 )>=0 and c(CO)>=0 and c(CO 2 )>=0.

[0026] Furthermore, the method further includes: determining whether the validity data of gas in transformer oil is accurate, and the determination logic is:

[0027] Condition 1: Test hydrogen content is less than 20 and ((test hydrogen content - online hydrogen content)>= 8 or online H 2 The current value of the content is higher than the previous H 2 The content value is reduced by more than 80%);

[0028] Condition 2: The test total hydrocarbon value is less than 20 and (test total hydrocarbon value - online total hydrocarbon value)>= 8;

[0029] Condition 3: The test total hydrocarbon value is less than 20 and (test total hydrocarbon value - online total hydrocarbon value)>=2 and the gas content of at least one component is 0;

[0030] Condition 4: Test hydrogen content is greater than or equal to 20 and ((test hydrogen content - online hydrogen content) / test hydrogen content is greater than or equal to 40% or online H 2 The current value of the content is higher than the previous H 2 The ratio of content values ​​<= -0.8);

[0031] Condition 5: The test total hydrocarbon value is greater than or equal to 20 and (test total hydrocarbon value - online total hydrocarbon value) / test total hydrocarbon value is greater than or equal to 50%;

[0032] Condition 6: The test total hydrocarbon value is greater than or equal to 20 and (test total hydrocarbon value - online total hydrocarbon value) / test total hydrocarbon value is greater than or equal to 30% and the gas content of at least one component is 0;

[0033] Condition 7: CH 4 , C 2 H 4 , C 2 H 6 There is a type of gas whose online data content is 0 and offline data is greater than or equal to 1;

[0034] Condition 8: Test CO content is greater than or equal to 100 and (test CO content - online CO content) / test CO content is greater than or equal to 50% and test CO 2 Content is greater than or equal to 100 and (test CO 2 Content-Online CO 2 Content) / test CO 2 Content is greater than or equal to 50%;

[0035] Condition 9: Test CO content is less than 100 and (test CO content - online CO content)>=50 and test CO 2 Content is less than 100 and (test CO 2 Content-Online CO 2 content)>=50.

[0036] Furthermore, if any of the above conditions is met, a prompt will be given that "device abnormality requires calibration"; otherwise, the gas data in the transformer oil is determined to be true and reliable real-time monitoring data, and data analysis and transformer early warning procedures are executed.

[0037] According to some embodiments, a second solution of the present invention provides a system for determining the validity of online monitoring data of dissolved gas in transformer oil, which adopts the following technical solution:

[0038] A system for determining the validity of online monitoring data of dissolved gas in transformer oil, comprising:

[0039] The data acquisition module is configured to obtain real-time online monitoring data of the transformer and obtain gas data in the transformer oil;

[0040] A gas content determination module is configured to determine the gas content based on the gas data in the transformer oil;

[0041] If the gas content is not empty and greater than zero, the data correctness is determined based on the screened gas data in the transformer oil, otherwise the stability of the monitoring device is determined;

[0042] The data correctness determination module is configured to determine whether the gas data in the transformer oil after screening is consistent with the previous monitoring data, and if not, determine whether the sum of hydrogen, carbon monoxide and carbon dioxide in the gas data in the transformer oil after screening is zero;

[0043] If it is not zero, then determine whether the calculated total hydrocarbons in the gas data in the screened transformer oil are equal to the total hydrocarbon value of the real-time data; if they are equal, then determine that the gas data in the screened transformer oil is correct;

[0044] The data validity determination module is configured to determine, based on the correct data on gas in transformer oil, whether the contents of hydrocarbons and hydrogen in the correct data on gas in transformer oil have both positive and negative changes and whether the contents of carbon monoxide and carbon dioxide have changed; if not, the correct data on gas in transformer oil is determined to be valid.

[0045] According to some embodiments, a third aspect of the present invention provides a computer-readable storage medium.

[0046] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps in the method for determining the validity of online monitoring data of dissolved gas in transformer oil as described in the first aspect above.

[0047] According to some embodiments, a fourth aspect of the present invention provides a computer device.

[0048] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the method for determining the validity of online monitoring data of dissolved gas in transformer oil as described in the first aspect above are implemented.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The method and system for determining the validity of online monitoring data of dissolved gas in transformer oil proposed in the present invention can make judgments using only the online monitoring data of dissolved gas in transformer oil, and can accurately determine situations such as device data invalidity, device data interruption, data error, device lack of carrier gas, and device detection data inaccurate, thereby ensuring that the data used for transformer (reactor) abnormality detection is true and valid, and greatly reducing the false alarm rate of online monitoring early warning of dissolved gas in oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0052] Figure 1 The present invention is a flowchart of a method for determining the validity of online monitoring data of dissolved gas in transformer oil according to an embodiment of the present invention. DETAILED DESCRIPTION

[0053] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0054] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0057] Embodiment 1

[0058] like Figure 1As shown, this embodiment provides a method for determining the validity of online monitoring data of dissolved gas in transformer oil. In this embodiment, the method includes the following steps:

[0059] Obtain real-time online monitoring data of transformers and obtain gas data in transformer oil;

[0060] Determining the gas content based on the gas data in the transformer oil;

[0061] If the gas content is not empty and greater than zero, the data correctness is determined based on the screened gas data in the transformer oil, otherwise the stability of the monitoring device is determined;

[0062] Based on the gas data in the transformer oil after screening, determine whether it is consistent with the previous monitoring data, if not consistent, determine whether the sum of hydrogen, carbon monoxide and carbon dioxide in the gas data in the transformer oil after screening is zero;

[0063] If it is not zero, then determine whether the calculated total hydrocarbons in the gas data in the screened transformer oil are equal to the total hydrocarbon value of the real-time data; if they are equal, then determine that the gas data in the screened transformer oil is correct;

[0064] Based on the correct data on gas in transformer oil, it is determined whether the contents of hydrocarbons and hydrogen in the correct data on gas in transformer oil have both positive and negative changes and whether the contents of carbon monoxide and carbon dioxide have changed; if not, it is determined that the correct data on gas in transformer oil is valid.

[0065] The stability determination of the monitoring device is specifically as follows:

[0066] Continuously collect real-time online monitoring data of transformers within the specified monitoring period;

[0067] For devices that have not uploaded valid data for three consecutive specified monitoring cycles, an abnormal device warning will be issued.

[0068] Whether the content of hydrocarbons and hydrogen in the correct gas data in the transformer oil changes in both positive and negative directions and whether the content of carbon monoxide and carbon dioxide changes, specifically:

[0069] CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 and hydrogen, whether any two of them have positive and negative changes at the same time, and CO, CO 2 whether they change simultaneously; or

[0070] CH 4, C 2 H 6 , C 2 H 4 , C 2 H 2 Do any three hydrocarbons in hydrogen have positive and negative changes at the same time, and CO, CO 2 whether any changes; or

[0071] CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 Do any four hydrocarbons in hydrogen have positive and negative changes at the same time?

[0072] If the gas content is not empty and greater than zero, specifically:

[0073] [c(H 2 )!=null and c(CH 4 ) !=null and c(C 2 H 6 ) !=null and c(C 2 H 4 ) !=nulland c(C 2 H 2 ) !=null and c(CO)!=null and c(CO 2 )!=null] and c(H 2 )>=0 and c(CH 4 )>=0and c(C 2 H 6 )>=0 and c(C 2 H 4 )>=0 and c(C 2 H 2 )>=0 and c(CO)>=0 and c(CO 2 )>=0.

[0074] The method described in this embodiment specifically includes:

[0075] The first step is to obtain the real-time online monitoring data of the transformer and obtain the latest set of transformer oil gas data; each set of data contains H 2 , CH 4 , C 2 H 6 , C 2 H 4 , C 2H 2 ,CO,CO 2 , real-time data total hydrocarbon value 8 data values;

[0076] In the second step, the real-time online monitoring data enters the device access detector, and the invalid data with a certain gas content of empty or a certain gas content <0 is filtered and not accessed, and the device non-access time is accumulated, and the third step is executed, otherwise the fourth step is executed. The access formula is as follows:

[0077] [c(H 2 )!=null and c(CH 4 ) !=null and c(C 2 H 6 ) !=null and c(C 2 H 4 ) !=nulland c(C 2 H 2 ) !=null and c(CO)!=null and c(CO 2 )!=null] and c(H 2 )>=0 and c(CH 4 )>=0and c(C 2 H 6 )>=0 and c(C 2 H 4 )>=0 and c(C 2 H 2 )>=0 and c(CO)>=0 and c(CO 2 )>=0.

[0078] The third step is to start the device stability detector and issue a device abnormality warning for devices that have not uploaded valid data for three consecutive specified monitoring cycles:

[0079] For example, if the upload cycle of 1000Kv, ±800Kv, and ±660Kv is 4h, the device will issue an alarm if there is no data upload for 12h;

[0080] It should be noted that the device here refers to an online monitoring device for dissolved gas in oil.

[0081] In the fourth step, the online monitoring data enters the data correctness detector to make a qualitative judgment on the online monitoring data:

[0082] 4.1 First, compare this data with the previous data. If the data are completely consistent, it will prompt "No change in data for N consecutive hours / days", and end the judgment of this data. Otherwise, execute 4.2;

[0083] 4.2 If H2 +CO+CO 2 =0, it will prompt "More than three gas contents are 0, the test result is wrong", end this data judgment, otherwise execute 4.3

[0084] 4.3 Calculation of CH 4 +C 2 H 6 +C 2 H 4 +C 2 H 2 The sum is compared with the total hydrocarbon value of the real-time data. If they are not equal, it will prompt "total hydrocarbon calculation error" and end this data judgment. Otherwise, execute the fifth step.

[0085] Step 5: Online monitoring data enters the device validity detector and performs the following judgments:

[0086] Any two of them (hydrocarbons and hydrogen) have positive and negative changes at the same time, and CO, CO 2 Change simultaneously; or

[0087] Any three (hydrocarbons, hydrogen) have positive and negative changes at the same time, and CO, CO 2 any change; or

[0088] Any 4 types (hydrocarbons, hydrogen) have positive and negative changes at the same time,

[0089] If the above judgment is established, it will prompt "the device is short of carrier gas" and end this data judgment, otherwise execute the sixth step.

[0090] Step 6: Online monitoring data enters the data accuracy detector, triggering the following judgment logic

[0091] Condition 1: Test hydrogen content is less than 20 and ((test hydrogen content - online hydrogen content)>= 8 or online H 2 The current value of the content is higher than the previous H 2 The content value is reduced by more than 80%);

[0092] Condition 2: The test total hydrocarbon value is less than 20 and (test total hydrocarbon value - online total hydrocarbon value)>= 8;

[0093] Condition 3: The test total hydrocarbon value is less than 20 and (test total hydrocarbon value - online total hydrocarbon value)>=2 and the gas content of at least one component is 0;

[0094] Condition 4: Test hydrogen content is greater than or equal to 20 and ((test hydrogen content - online hydrogen content) / test hydrogen content is greater than or equal to 40% or online H 2 The current value of the content is higher than the previous H 2 The ratio of content values ​​<= -0.8);

[0095] Condition 5: The test total hydrocarbon value is greater than or equal to 20 and (test total hydrocarbon value - online total hydrocarbon value) / test total hydrocarbon value is greater than or equal to 50%;

[0096] Condition 6: The test total hydrocarbon value is greater than or equal to 20 and (test total hydrocarbon value - online total hydrocarbon value) / test total hydrocarbon value is greater than or equal to 30% and the gas content of at least one component is 0;

[0097] Condition 7: CH 4 , C 2 H 4 , C 2 H 6 There is a type of gas whose online data content is 0 and offline data is greater than or equal to 1;

[0098] Condition 8: Test CO content is greater than or equal to 100 and (test CO content - online CO content) / test CO content is greater than or equal to 50% and test CO 2 Content is greater than or equal to 100 and (test CO 2 Content-Online CO 2 Content) / test CO 2 Content is greater than or equal to 50%;

[0099] Condition 9: Test CO content is less than 100 and (test CO content - online CO content)>=50 and test CO 2 Content is less than 100 and (test CO 2 Content-Online CO 2 Content)>=50;

[0100] If any of the above conditions are met, the message "Device abnormality requires calibration" will be displayed, and no subsequent data analysis will be performed. Otherwise, proceed to step 7.

[0101] It should be noted that the test data mentioned in the above 9 conditions refer to the historical periodic collection of gas data in transformer oil and the detection of the content of each gas by laboratory testing equipment, which is consistent with the real-time online monitoring data and includes H 2 , CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 ,CO,CO 2 , real-time data total hydrocarbon value 8 data values.

[0102] In the seventh step, the online monitoring data is considered to be authentic and reliable real-time monitoring data, triggering the transformer differentiated early warning module.

[0103] Embodiment 2

[0104] This embodiment provides a system for determining the validity of online monitoring data of dissolved gas in transformer oil, comprising:

[0105] The data acquisition module is configured to obtain real-time online monitoring data of the transformer and obtain gas data in the transformer oil;

[0106] A gas content determination module is configured to determine the gas content based on the gas data in the transformer oil;

[0107] If the gas content is not empty and greater than zero, the data correctness is determined based on the screened gas data in the transformer oil, otherwise the stability of the monitoring device is determined;

[0108] The data correctness determination module is configured to determine whether the gas data in the transformer oil after screening is consistent with the previous monitoring data, and if not, determine whether the sum of hydrogen, carbon monoxide and carbon dioxide in the gas data in the transformer oil after screening is zero;

[0109] If it is not zero, then determine whether the calculated total hydrocarbons in the gas data in the screened transformer oil are equal to the total hydrocarbon value of the real-time data; if they are equal, then determine that the gas data in the screened transformer oil is correct;

[0110] The data validity determination module is configured to determine, based on the correct data on gas in transformer oil, whether the contents of hydrocarbons and hydrogen in the correct data on gas in transformer oil have both positive and negative changes and whether the contents of carbon monoxide and carbon dioxide have changed; if not, the correct data on gas in transformer oil is determined to be valid.

[0111] The examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiment 1. It should be noted that the above modules as part of the system can be executed in a computer system such as a set of computer executable instructions.

[0112] The description of each embodiment in the above embodiments has different emphases. For parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0113] The proposed system can be implemented in other ways. For example, the system embodiment described above is only illustrative, and the division of the modules is only a logical function division. In actual implementation, there may be other division methods, such as multiple modules can be combined or integrated into another system, or some features can be ignored or not executed.

[0114] Embodiment 3

[0115] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the method for determining the validity of online monitoring data of dissolved gas in transformer oil as described in the first embodiment above are implemented.

[0116] Embodiment 4

[0117] This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps in the method for determining the validity of online monitoring data of dissolved gas in transformer oil as described in the first embodiment above are implemented.

[0118] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0119] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0120] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0121] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0122] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0123] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A method for determining the validity of online monitoring data of dissolved gas in transformer oil, It is characterized in that include: Obtain real-time online monitoring data of transformers and obtain gas data in transformer oil; Determining the gas content based on the gas data in the transformer oil; If the gas content is not empty and greater than zero, the data correctness is determined based on the screened gas data in the transformer oil, otherwise the stability of the monitoring device is determined; Based on the gas data in the transformer oil after screening, determine whether it is consistent with the previous monitoring data, if not consistent, determine whether the sum of hydrogen, carbon monoxide and carbon dioxide in the gas data in the transformer oil after screening is zero; If it is not zero, then determine whether the calculated total hydrocarbons in the gas data in the screened transformer oil are equal to the total hydrocarbon value of the real-time data; if they are equal, then determine that the gas data in the screened transformer oil is correct; Based on the correct gas data in transformer oil, determine CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 and hydrogen, whether any two of them have positive and negative changes at the same time and CO, CO 2 Whether to change simultaneously, or CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 and hydrogen, whether any three of them have positive and negative changes at the same time and CO, CO 2 Whether any changes, or CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 and hydrogen, whether any four have positive and negative changes at the same time; if not, the correct data on the gas in the transformer oil is valid.

2. A method for determining the validity of online monitoring data of dissolved gas in transformer oil according to claim 1, It is characterized in that The stability determination of the monitoring device is specifically as follows: Continuously collect real-time online monitoring data of transformers within the specified monitoring period; For devices that have not uploaded valid data for three consecutive specified monitoring cycles, an abnormal device warning will be issued.

3. A method for determining the validity of online monitoring data of dissolved gas in transformer oil as claimed in claim 1, It is characterized in that The gas data in transformer oil include H 2 , CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 ,CO,CO 2 , real-time data total hydrocarbon value; The specific total hydrocarbon value of the real-time data includes: CH 4 , C 2 H 6 , C 2 H 4 , and C 2 H 2 and their sum.

4. A method for determining the validity of online monitoring data of dissolved gas in transformer oil as claimed in claim 1, It is characterized in that If the gas content is not empty and greater than zero, specifically: [c(H 2 )!=null and c(CH 4 ) !=null and c(C 2 H 6 ) !=null and c(C 2 H 4 ) !=null and c(C 2 H 2 ) !=null and c(CO)!=null and c(CO 2 )!=null] and c(H 2 )>=0 and c(CH 4 ) >=0 andc(C 2 H 6 ) >=0 and c(C 2 H 4 ) >=0 and c(C 2 H 2 ) >=0 and c(CO) >=0 and c(CO 2 ) >=0。 5. A method for determining the validity of online monitoring data of dissolved gas in transformer oil as claimed in claim 1, It is characterized in that Also includes: The validity of the gas data in transformer oil is judged to be accurate or not. The judgment logic is as follows: Condition 1: Test hydrogen content is less than 20 and ((test hydrogen content - online hydrogen content) >= 8 or online H 2 The current value of the content is higher than the previous H 2 The content value is reduced by more than 80%); Condition 2: The test total hydrocarbon value is less than 20 and (test total hydrocarbon value - online total hydrocarbon value) >= 8; Condition 3: The test total hydrocarbon value is less than 20 and (test total hydrocarbon value - online total hydrocarbon value) >= 2 and the gas content of at least one component is 0; Condition 4: Test hydrogen content is greater than or equal to 20 and ((test hydrogen content - online hydrogen content) / test hydrogen content is greater than or equal to 40% or online H 2 The current value of the content is higher than the previous H 2 The ratio of content values ​​<= -0.8); Condition 5: The test total hydrocarbon value is greater than or equal to 20 and (test total hydrocarbon value - online total hydrocarbon value) / test total hydrocarbon value is greater than or equal to 50%; Condition 6: The test total hydrocarbon value is greater than or equal to 20 and (test total hydrocarbon value - online total hydrocarbon value) / test total hydrocarbon value is greater than or equal to 30% and the gas content of at least one component is 0; Condition 7: CH 4 , C 2 H 4 , C 2 H 6 There is a type of gas whose online data content is 0 and offline data is greater than or equal to 1; Condition 8: Test CO content is greater than or equal to 100 and (test CO content - online CO content) / test CO content is greater than or equal to 50% and test CO 2 Content is greater than or equal to 100 and (test CO 2 Content-Online CO 2 Content) / test CO 2 Content is greater than or equal to 50%; Condition 9: Test CO content is less than 100 and (test CO content - online CO content)>=50 and test CO 2 Content is less than 100 and (test CO 2 Content-Online CO 2 content)>=50.

6. A method for determining the validity of online monitoring data of dissolved gas in transformer oil as claimed in claim 5, It is characterized in that If any of the above conditions is met, it will prompt "device abnormality requires calibration"; otherwise, the gas data in the transformer oil is determined to be true and reliable real-time monitoring data, and data analysis and transformer early warning procedures are executed.

7. A system for determining the validity of online monitoring data of dissolved gas in transformer oil. It is characterized in that include: The data acquisition module is configured to obtain real-time online monitoring data of the transformer and obtain gas data in the transformer oil; A gas content determination module is configured to determine the gas content based on the gas data in the transformer oil; If the gas content is not empty and greater than zero, the data correctness is determined based on the screened gas data in the transformer oil, otherwise the stability of the monitoring device is determined; The data correctness determination module is configured to determine whether the gas data in the transformer oil after screening is consistent with the previous monitoring data, and if not, determine whether the sum of hydrogen, carbon monoxide and carbon dioxide in the gas data in the transformer oil after screening is zero; If it is not zero, then determine whether the calculated total hydrocarbons in the gas data in the screened transformer oil are equal to the total hydrocarbon value of the real-time data; if they are equal, then determine that the gas data in the screened transformer oil is correct; The data validity determination module is configured to determine, based on the correct transformer oil gas data, whether CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 and hydrogen, whether any two of them have positive and negative changes at the same time and CO, CO 2 Whether to change simultaneously, or CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 and hydrogen, whether any three of them have positive and negative changes at the same time and CO, CO 2 Whether any changes, or CH 4 , C 2 H 6 , C 2 H 4 , C 2 H 2 and hydrogen, whether any four have positive and negative changes at the same time; if not, the correct data on the gas in the transformer oil is valid.

8. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the program is executed by a processor, the steps in the method for determining the validity of online monitoring data of dissolved gas in transformer oil as described in any one of claims 1 to 6 are implemented.

9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the program, the steps in the method for determining the validity of online monitoring data of dissolved gas in transformer oil according to any one of claims 1 to 6 are implemented.

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