Oil chromatography monitoring equipment anomaly detection method and device based on methane response, equipment, storage medium and program product

Abstract

The invention relates to an oil chromatography monitoring equipment anomaly detection method and device based on methane response, equipment, a storage medium and a program product. When methane in ambient air is monitored in real time and methane spectrogram response information is detected to be abnormal, self-calibration analysis of preset mixed standard gas is started in real time, and whether the oil chromatography monitoring equipment is abnormal or not is determined based on a comparison judgment result of a self-calibration analysis result and a preset analysis result. Compared with the traditional long-interval anomaly analysis performed by manually extracting an oil sample or based on a self-calibration system, the method has the advantages that the methane response analysis deviation degree in the ambient air is incorporated into the real-time monitoring index of the oil chromatography monitoring equipment; whether the oil chromatography monitoring equipment is abnormal or not is further accurately judged through the self-calibration analysis result in time, the abnormity of the oil chromatography monitoring equipment can be captured in real time, the timeliness of obtaining the abnormity of the oil chromatography monitoring equipment is improved, and the accuracy of equipment abnormity detection can be guaranteed.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and in particular to an anomaly detection method, apparatus, computer equipment, computer-readable storage medium, and computer program product for oil chromatography monitoring equipment based on methane response. Background Technology

[0002] As a critical piece of equipment in the power system, the operating status of transformers directly affects the safety and stability of the power grid. Online oil chromatography monitoring equipment is an important means of real-time monitoring of fault gases (such as hydrogen, methane, ethane, ethylene, acetylene, etc.) inside transformers. By monitoring the content of fault gases in transformer oil, the operating status of the transformer can be effectively assessed, and potential faults can be predicted. However, during long-term operation, oil chromatography is prone to problems such as column failure and reduced sensitivity of gas sensors in the detector, which can easily lead to deviations in the accuracy of monitoring data and affect the reliability of fault diagnosis. Therefore, it is necessary to regularly check the status of oil chromatography monitoring equipment. Currently, the method for detecting abnormalities in oil chromatography monitoring equipment usually involves manually extracting transformer oil samples periodically for analysis. Manual calibration cycles are long, typically 1 to 2 years. During the interval between calibrations, blind spots in equipment operation and management gaps can easily occur, which is a major reason for occasional transformer accidents in the power system. With the advancement of technology, some manufacturers have developed and put into use online oil chromatography monitoring devices equipped with self-calibration systems. However, due to the limited capacity of standard gas cylinders, it is not possible to perform self-calibration frequently within the 1 to 2 year oil chromatography calibration cycle. This makes it difficult to detect abnormalities in the oil chromatography monitoring equipment in a timely manner, and it is still difficult to ensure the long-term stability of the online oil chromatography monitoring device.

[0003] Therefore, current methods for detecting anomalies in oil chromatography monitoring equipment suffer from low detection efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for abnormal detection of oil chromatography monitoring equipment based on methane response, which can improve detection efficiency and address the above-mentioned technical problems.

[0005] In a first aspect, this application provides a method for detecting anomalies in an oil chromatography monitoring device based on methane response, comprising:

[0006] The ambient air is acquired through the ambient air intake unit of the oil chromatography monitoring device to be tested, and the methane in the ambient air is analyzed by chromatography to obtain the methane spectrum response information corresponding to the methane.

[0007] Based on the preset methane reference value corresponding to the oil chromatography monitoring device, a first comparison result is obtained between the methane spectral response information and the spectral data corresponding to the preset methane reference value.

[0008] If the methane spectrum response information is determined to be abnormal based on the first comparison result, then self-calibration is initiated based on the preset mixed standard gas, and self-calibration analysis is performed on the preset mixed standard gas to obtain the corresponding current self-calibration analysis result;

[0009] Based on the second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas, it is determined whether there is an abnormality in the detection result of the oil chromatography monitoring device.

[0010] Secondly, this application also provides an anomaly detection device for oil chromatography monitoring equipment based on methane response, comprising:

[0011] The first acquisition module is used to acquire ambient air through the ambient air intake unit of the oil chromatography monitoring device to be detected and to perform chromatographic analysis on the methane in the ambient air to obtain the methane spectrum response information corresponding to the methane.

[0012] The first comparison and analysis module is used to obtain a first comparison result between the methane spectrum response information and the spectrum data corresponding to the methane preset reference value based on the methane preset reference value corresponding to the oil chromatography monitoring device;

[0013] The second acquisition module is used to initiate self-calibration based on a preset mixed standard gas if the methane spectrum response information is determined to be abnormal according to the first comparison result, and to perform self-calibration analysis on the preset mixed standard gas to obtain the corresponding current self-calibration analysis result.

[0014] The second comparison analysis module is used to determine whether there is any abnormality in the detection results of the oil chromatography monitoring device based on the second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas.

[0015] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method.

[0016] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0017] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method.

[0018] The aforementioned method, apparatus, computer equipment, computer-readable storage medium, and computer program product for anomaly detection in oil chromatography monitoring equipment based on methane response acquire methane in the air through an ambient air intake unit. When an anomaly in the methane response is determined by comparing a preset methane benchmark value with the methane spectral response information, the oil chromatography monitoring equipment performs a self-calibration analysis on a preset mixed standard gas. The analysis results are compared with preset analysis results to determine the corresponding detection result of the oil chromatography monitoring equipment. Compared to traditional anomaly analysis through manual oil sample extraction, this solution first combines a preset methane benchmark value with real-time acquisition of methane in ambient air by the oil chromatography monitoring equipment. It then detects the deviation of the methane response analysis of the oil chromatography monitoring equipment. When an anomaly in the methane spectral response information is detected, a self-calibration analysis is initiated. Based on the analysis results of the preset mixed standard gas and the preset analysis results, the anomaly of the oil chromatography monitoring equipment is verified and judged. This ensures both the accuracy of anomaly detection by the oil chromatography monitoring equipment and the real-time capture of anomalies, improving the timeliness of anomaly detection. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating an anomaly detection method for an oil chromatography monitoring device based on methane response in one embodiment;

[0021] Figure 2 This is a self-calibrated structural block diagram in one embodiment;

[0022] Figure 3 This is a flowchart illustrating the self-correction step in one embodiment;

[0023] Figure 4 This is a schematic diagram of the abnormal detection system of an oil chromatography monitoring device in one embodiment;

[0024] Figure 5 This is a flowchart illustrating an anomaly detection method for an oil chromatography monitoring device based on methane response, as described in another embodiment.

[0025] Figure 6 This is a flowchart illustrating an anomaly detection method for an oil chromatography monitoring device based on methane response in yet another embodiment;

[0026] Figure 7This is a structural block diagram of an abnormality detection device for an oil chromatography monitoring equipment based on methane response in one embodiment;

[0027] Figure 8 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] In one embodiment, such as Figure 1 As shown, a method for anomaly detection in oil chromatography monitoring equipment based on methane response is provided. This embodiment illustrates the application of this method to an oil chromatography monitoring equipment. It is understood that this method can also be applied to a server, and further to a system including both an oil chromatography monitoring equipment and a server, and is implemented through the interaction between the oil chromatography monitoring equipment and the server, including the following steps S202 to S208. Wherein:

[0030] Step S202: The ambient air is acquired through the ambient air intake unit of the oil chromatography monitoring device to be tested, and the methane in the ambient air is analyzed by chromatography to obtain the methane spectrum response information corresponding to the methane.

[0031] The oil chromatography monitoring device to be tested can be an oil chromatography monitoring device that requires anomaly detection, and this device can be installed inside the transformer. The oil chromatography monitoring device may include an ambient air intake unit, which can be used to collect ambient air at the transformer location, thereby performing oil chromatography analysis based on the ambient air. The oil chromatography monitoring device can perform self-anomaly detection and correction. For example, the oil chromatography deviation warning and self-correction method uses methane with a stable concentration in ambient air as the basis for real-time verification. The oil chromatography monitoring device can obtain methane through the ambient air intake unit, perform chromatographic analysis on the methane, and obtain the corresponding methane response value. After chromatographic analysis of the methane, the retention time and peak area of ​​the methane can be obtained. The oil chromatography monitoring device can determine whether further anomaly detection is needed by analyzing the peak area of ​​the methane. The aforementioned methane spectral response information can be the chromatographic analysis response of methane in the ambient air at the transformer location. The oil chromatography monitoring device can obtain the aforementioned methane spectral response information through real-time monitoring.

[0032] Step S204: Based on the preset methane reference value corresponding to the oil chromatography monitoring device, obtain the first comparison result between the methane spectrum response information and the spectrum data corresponding to the preset methane reference value.

[0033] The oil chromatography monitoring equipment can be pre-set with a preset benchmark value for methane spectral response information. This preset benchmark value corresponds to a specific oil chromatography monitoring equipment; each equipment corresponds to a specific methane benchmark value. The spectral data for this preset benchmark value represents a threshold indicating whether the methane spectral response information is within the normal range. For example, if the oil chromatography monitoring equipment analyzes the methane spectral response information and detects a deviation between the analysis result and the preset benchmark value exceeding a set methane response deviation limit, it indicates an anomaly in the methane spectral response information and a potential malfunction in the oil chromatography monitoring equipment. Otherwise, it indicates a normal methane spectral response and a normal oil chromatography monitoring equipment.

[0034] The analysis results of the aforementioned methane spectral response information are compared with the preset methane reference value to obtain the first comparison result. The oil chromatography monitoring equipment can acquire the preset methane reference value corresponding to the oil chromatography monitoring equipment and compare the methane spectral response information with the spectral data of the preset methane reference value to obtain the corresponding first comparison result.

[0035] Step S206: If the methane spectrum response information is determined to be abnormal based on the first comparison result, then self-calibration is initiated based on the preset mixed standard gas, and self-calibration analysis is performed on the preset mixed standard gas to obtain the corresponding current self-calibration analysis result.

[0036] The oil chromatography monitoring device can determine whether the methane spectrum response information is abnormal based on the first comparison result, thereby determining whether the oil chromatography monitoring device needs to be calibrated and corrected for the mixed gas components. When the oil chromatography monitoring device detects an abnormality in the methane spectrum response information in the first comparison result, it can acquire a preset mixed standard gas. The preset mixed standard gas represents a mixture of multiple gases with known nominal concentrations. This preset mixed standard gas can be a target gas in the transformer oil to be monitored, and its components have been pre-detected. That is, the preset mixed standard gas has corresponding preset analysis results. These preset analysis results can be the results of a self-calibrated chromatographic analysis of the preset mixed standard gas. These preset analysis results can also be the actual chromatographic analysis results of the preset mixed standard gas. To determine whether correction is needed for the oil chromatography monitoring device, when an abnormality in the methane spectrum response information is detected, the oil chromatography monitoring device can acquire the preset mixed standard gas and perform a self-calibration analysis on it to obtain the corresponding current self-calibration analysis results.

[0037] Step S208: Based on the second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas, determine whether there is any abnormality in the detection result of the oil chromatography monitoring device.

[0038] After obtaining the above analytical results, the oil chromatography monitoring device can compare these results with the preset analytical results corresponding to the preset mixed standard gas to obtain a second comparison result. The current self-calibration analytical result represents the result obtained by the oil chromatography monitoring device through self-calibration analysis of the preset mixed standard gas; the preset analytical result represents the result obtained after prior self-calibration analysis of the preset mixed standard gas. The preset analytical result can be the actual chromatographic analysis result of the preset mixed standard gas. The oil chromatography monitoring device can then compare the current self-calibration analytical result with the preset analytical result to obtain the second comparison result, and determine whether there are any abnormalities in the detection results of the oil chromatography monitoring device based on the second comparison result.

[0039] For example, an oil chromatography monitoring device can compare the above analytical results with the retention times and peak areas of each gas component corresponding to each retention time in the preset analytical results. If any abnormality is detected in the comparison result of retention time or peak area, the above detection result is determined to be abnormal; otherwise, the above detection result indicates that the oil chromatography monitoring device is normal. The above abnormalities include those requiring correction, as well as those requiring alarms and maintenance, with different judgment ranges for each type of abnormality. For oil chromatography monitoring devices with abnormal detection results, the device can take appropriate actions based on whether the abnormality requires correction or alarms and maintenance. For example, the oil chromatography monitoring device can perform self-correction to correct the analytical results of the chromatographic analysis, restoring the chromatographic analysis results of the mixed gas components to normal values; the oil chromatography monitoring device can also issue an alarm, thereby prompting relevant technicians to perform maintenance.

[0040] In the aforementioned methane-responsive oil chromatography monitoring equipment anomaly detection method, methane in the air is acquired through the ambient air intake unit. When an anomaly is detected in the methane spectrum response information based on a comparison between a preset methane benchmark value and the methane spectrum response information, the oil chromatography monitoring equipment performs a self-calibration analysis on a preset mixed standard gas. The analysis results are then compared with preset analysis results to determine the corresponding detection result for the oil chromatography monitoring equipment. Compared to traditional anomaly analysis using manual oil sample extraction, this method first combines a preset methane benchmark value with real-time acquisition of methane in the ambient air by the oil chromatography monitoring equipment. It then detects the deviation of the methane response analysis of the oil chromatography monitoring equipment. When an anomaly in the methane spectrum response information is detected, the anomaly of the oil chromatography monitoring equipment is detected and determined based on the analysis results of the preset mixed standard gas and the preset analysis results. This method ensures the accuracy of anomaly detection and enables real-time capture of anomalies, improving the timeliness of anomaly detection.

[0041] Furthermore, by utilizing the stable methane content in ambient air, this method serves as a calibration benchmark for real-time monitoring of the oil chromatography monitoring equipment's operational status. When the monitoring data deviates from the set methane deviation threshold, the system issues a deviation warning and triggers self-calibration and self-correction procedures. This method addresses the technical shortcomings of traditional oil chromatography monitoring equipment, which suffers from long calibration cycles and regulatory blind spots during calibration intervals, hindering timely detection and handling of equipment malfunctions. It improves the long-term stability and reliability of oil chromatography monitoring data in the power grid system.

[0042] In one embodiment, obtaining the preset methane reference value corresponding to the oil chromatography monitoring device includes: querying a historical record database to obtain the operation record corresponding to the oil chromatography monitoring device; the operation record includes the installation record, maintenance record, and calibration record corresponding to the oil chromatography monitoring device; based on the installation record, determining the first methane measurement value in ambient air after the installation of the oil chromatography monitoring device to obtain a first preset methane reference value, wherein the spectral data corresponding to the first preset methane reference value includes retention time and peak area; based on the maintenance record, determining the methane measurement value in ambient air after maintenance of the oil chromatography monitoring device. The first determination value of methane is used to obtain a second preset reference value for methane. The spectral data corresponding to the second preset reference value for methane includes retention time and peak area. Based on the above calibration record, the first determination value of methane in ambient air after calibration of the above oil chromatography monitoring equipment is determined to obtain a third preset reference value for methane. The spectral data corresponding to the third preset reference value for methane includes retention time and peak area. Based on one or more of the above first preset reference value for methane, the above second preset reference value for methane, and the above third preset reference value for methane, the above preset reference value for methane is obtained. The spectral data corresponding to the preset reference value for methane includes retention time and peak area.

[0043] In this embodiment, the oil chromatography monitoring device can determine the aforementioned preset methane reference value in multiple ways. For example, the oil chromatography monitoring device can be equipped with a historical record database, which stores various operation records of the oil chromatography monitoring device during historical time periods. These operation records include, but are not limited to, installation records, maintenance records, and calibration records corresponding to the oil chromatography monitoring device. Specifically, the installation record represents the installation of the oil chromatography monitoring device, the maintenance record represents the maintenance of the oil chromatography monitoring device, and the calibration record represents the calibration of the oil chromatography monitoring device. The oil chromatography monitoring device can determine the preset methane reference value corresponding to the oil chromatography monitoring device based on these records.

[0044] Specifically, regarding the installation record, the oil chromatography monitoring equipment can determine the initial measurement value of methane in ambient air after installation, thus obtaining the first preset methane reference value. The spectral data corresponding to the first preset methane reference value includes retention time and peak area. The retention time can be the retention time of methane in ambient air within the spectral data corresponding to the first preset methane reference value, and the peak area can be the peak area of ​​methane within the spectral data corresponding to the first preset methane reference value. In other words, after the oil chromatography monitoring equipment is installed successfully, it needs to be used to perform the first measurement of methane in ambient air. The measured value at this time can be a value that corresponds to the actual measured value of methane in ambient air, and the oil chromatography monitoring equipment can use this initial measurement value as the first preset methane reference value.

[0045] Based on the maintenance records, the oil chromatography monitoring equipment can determine the initial measurement value of methane in ambient air after maintenance, thus obtaining a second preset reference value for methane. The spectral data corresponding to the second preset reference value includes retention time and peak area. The retention time can be the retention time of methane in ambient air within the spectral data corresponding to the second preset reference value, and the peak area can be the peak area of ​​methane within the spectral data corresponding to the second preset reference value. In other words, after maintenance, the oil chromatography monitoring equipment needs to be used for the first measurement of methane in ambient air before activation. The measured value at this time can be a value that corresponds to the actual measured value of methane in ambient air, and the oil chromatography monitoring equipment can use this initial measurement value as the second preset reference value for methane.

[0046] For the calibration record, the oil chromatography monitoring equipment can determine the first measurement value of methane in ambient air after calibration, based on the calibration record, to obtain the third preset reference value for methane. The spectral data corresponding to the third preset reference value includes retention time and peak area. The retention time can be the retention time of methane in ambient air in the spectral data corresponding to the third preset reference value, and the peak area can be the peak area of ​​methane in the spectral data corresponding to the third preset reference value. In other words, after the above-mentioned chromatography monitoring equipment has passed routine calibration, it needs to be used to perform the first measurement of methane in ambient air. The measured value at this time can be a value that conforms to the actual measured value of methane in ambient air, and thus the oil chromatography monitoring equipment can use the above-mentioned first measurement value as the third preset reference value for methane.

[0047] The oil chromatography monitoring equipment can obtain the aforementioned preset methane reference value based on one or more of the first preset methane reference value, the second preset methane reference value, and the third preset methane reference value. The spectral data corresponding to the preset methane reference value includes retention time and peak area. The retention time can be the retention time of methane in ambient air in the spectral data corresponding to the preset methane reference value, and the peak area can be the peak area of ​​methane in the spectral data corresponding to the preset methane reference value. The retention time is used to qualitatively determine the type of gas, and the peak area is used to quantitatively determine the gas value. The measured value can be the value obtained after chromatographic analysis of methane.

[0048] Specifically, the aforementioned preset methane reference value, also known as the methane response reference value, is the first measurement value of methane in ambient air after the oil chromatography monitoring equipment has passed installation and testing, or the first measurement value of methane in ambient air after the online oil chromatography monitoring equipment has been repaired and restarted, or after the oil chromatography monitoring equipment has passed routine calibration. Each of these measurements represents the response information obtained after chromatographic analysis. The methane response reference value includes, but is not limited to, the retention time and peak area of ​​the methane chromatographic response in the chromatogram.

[0049] In this embodiment, the oil chromatography monitoring equipment can combine installation records, maintenance records, and calibration records to determine the measured values ​​of methane in ambient air over a historical period, thereby obtaining a preset methane reference value for detecting whether the oil chromatography monitoring equipment needs correction. The preset methane reference value is obtained by using the measured values ​​of the methane response obtained from the chromatographic analysis of methane after installation, maintenance, and calibration, thus improving the accuracy of the preset methane reference value.

[0050] In one embodiment, obtaining a first comparison result between the methane spectral response information and the spectral data corresponding to the preset methane reference value includes: obtaining a first retention time and a first peak area corresponding to methane in the ambient air based on the methane spectral response information; and obtaining a comparison result between the first retention time and the first peak area and the retention time and peak area threshold range corresponding to the preset methane reference value, as the first comparison result.

[0051] In this embodiment, the aforementioned preset methane reference value can be a reference value obtained after the initial measurement and chromatographic analysis of methane in the ambient air during the aforementioned historical time period. Similarly, the oil chromatography monitoring device can measure the methane in the ambient air obtained from the aforementioned real-time monitoring. For example, the oil chromatography monitoring device performs chromatographic analysis on the methane in the ambient air to obtain the corresponding first retention time and first peak area. Wherein, after the oil chromatography monitoring device determines that the analyzed gas is methane based on the first retention time, it can compare the peak areas. The aforementioned preset methane reference value can correspond to a retention time and peak area threshold range. The aforementioned retention time and peak area threshold range can be values ​​obtained after measuring the methane spectral response information during the aforementioned historical time period. For example, by measuring the methane spectral response information, a retention time threshold range is determined based on the measured methane retention time, and a peak area threshold range is determined based on the measured methane peak area, for example, by adding or subtracting a preset value from the methane peak area to obtain the peak area threshold range.

[0052] The oil chromatography monitoring device can obtain a comparison result between the first peak area and the peak area threshold range corresponding to the preset methane reference value, thus obtaining the first comparison result. In other words, the oil chromatography monitoring device can compare the first peak area corresponding to the methane spectral response information with the peak area threshold range corresponding to the preset methane reference value, thereby detecting whether the methane spectral response information deviates from the reference value, resulting in an anomaly.

[0053] In one embodiment, after obtaining the first comparison result between the methane spectrum response information and the preset methane reference value, the method further includes: if the first comparison result shows that the first retention time is not within the retention time threshold range corresponding to the preset methane reference value, then the methane spectrum response information is determined to be abnormal; if the first comparison result shows that the first retention time is within the retention time threshold range corresponding to the preset methane reference value, but the first peak area is not within the peak area threshold range corresponding to the preset methane reference value, then the methane spectrum response information is determined to be abnormal.

[0054] In this embodiment, the oil chromatography monitoring device can determine whether the above-mentioned methane spectrum response information is abnormal based on the first comparison result. For example, the oil chromatography monitoring device can detect whether the above-mentioned first retention time is consistent with the retention time corresponding to the preset reference value. If they are inconsistent, and the first retention time is not within the retention time threshold range corresponding to the preset reference value of methane, then the methane spectrum response information is determined to be abnormal. If they are consistent, and the first retention time is within the retention time threshold range corresponding to the preset reference value of methane, the oil chromatography monitoring device further determines whether the first peak area is within the peak area threshold range corresponding to the preset reference value of methane. If the first peak area is not within the peak area threshold range corresponding to the preset reference value of methane, then it indicates that the methane spectrum response information deviates too much from the reference value, and the oil chromatography monitoring device determines that the above-mentioned methane spectrum response information is abnormal.

[0055] If the oil chromatography monitoring device detects that the area of ​​the first peak is within the peak area threshold range corresponding to the preset reference value of methane, the oil chromatography monitoring device can determine that the methane spectrum response information is normal.

[0056] Specifically, the oil chromatography monitoring equipment needs to monitor methane in the ambient air where the transformer is located in real time and determine deviations. The oil chromatography monitoring equipment determines deviations in the real-time methane monitoring results based on a pre-stored baseline value for the response of methane in the ambient air. This deviation determination is based on a set methane response deviation limit, which is set according to actual application requirements and equipment performance and stored in the data diagnostic and early warning unit. This limit may include, but is not limited to, the aforementioned retention time threshold and peak area threshold. When the methane monitoring response deviates from its baseline value by more than the allowable range of the threshold, the oil chromatography monitoring equipment issues a deviation warning and triggers the self-calibration unit to start operation and perform a self-calibration process. Self-calibration refers to the oil chromatography monitoring equipment performing a self-test of its accuracy in chromatographic analysis of a preset mixed standard gas to determine if there is any deviation in the detected value.

[0057] Through the above embodiments, the oil chromatography monitoring device can compare the retention time and peak area corresponding to the real-time monitored methane spectrum response information with the preset reference value's retention time and peak area threshold range. Based on the comparison results, it can detect whether the real-time monitored methane spectrum response information is abnormal, thereby achieving the technical effect of improving the detection efficiency of methane spectrum response information anomalies.

[0058] In one embodiment, performing self-calibration analysis on the aforementioned preset mixed standard gas to obtain the corresponding current self-calibration analysis result includes: performing self-calibration analysis on the aforementioned preset mixed standard gas to obtain the self-calibration retention time and self-calibration peak area corresponding to each gas component in the aforementioned preset mixed standard gas; and obtaining the aforementioned current self-calibration analysis result based on the aforementioned self-calibration retention time and self-calibration peak area.

[0059] In this embodiment, the aforementioned preset analysis results include the concentrations of each gas component in the preset mixed standard gas and their corresponding chromatographic data. The chromatographic data includes retention time and peak area, and preset retention time threshold range, preset maximum allowable deviation range for peak area, and preset normal threshold range for gas peak area are defined. The preset normal threshold range for gas peak area falls within the preset maximum allowable deviation range. The preset normal threshold range for gas peak area indicates that the detection result is within a normal range. The preset analysis results represent the true analysis results obtained from self-calibration analysis of the preset mixed standard gas.

[0060] The aforementioned preset retention time threshold range, preset maximum allowable deviation range of peak area, and preset normal threshold range of gas peak area can be obtained based on the preset retention time and preset gas peak area corresponding to each gas component in the preset mixed standard gas. For example, by increasing or decreasing the preset retention time by a preset value, the preset retention time threshold range can be obtained; by increasing or decreasing the preset gas peak area by a preset value, the preset maximum allowable deviation range of peak area and preset normal threshold range of gas peak area can be obtained.

[0061] The aforementioned preset retention time threshold range represents the allowable range of retention times for each gas component in the preset mixed standard gas; the preset normal peak area threshold range represents the normal allowable range of peak areas for each gas component in the preset mixed standard gas; and the preset maximum allowable deviation range of peak area represents the maximum allowable deviation range of peak areas for each gas component in the preset mixed standard gas. The aforementioned preset retention time threshold range, preset maximum allowable deviation range of peak area, and preset normal peak area threshold range can be used as standards for comparison.

[0062] Oil chromatography monitoring equipment can determine whether there is any abnormality by performing self-calibration analysis on the aforementioned preset mixed standard gas and comparing the results of the self-calibration analysis with the preset analysis results. Specifically, the oil chromatography monitoring equipment can also perform self-calibration analysis on the aforementioned preset mixed standard gas to obtain the self-calibrated component concentration, self-calibration retention time, and self-calibration peak area corresponding to each gas component in the preset mixed standard gas. Therefore, the oil chromatography monitoring equipment can obtain the above analysis results based on the self-calibrated component concentration, the self-calibration retention time, and the self-calibration peak area. The self-calibrated component concentration represents the concentration value of each gas obtained by the oil chromatography monitoring equipment in real-time from the self-calibration analysis of the preset mixed standard gas; the self-calibration retention time and self-calibration peak area represent the retention time and peak area of ​​each gas component in the analysis results obtained by the oil chromatography monitoring equipment in real-time from the self-calibration analysis of the preset mixed standard gas. Therefore, the oil chromatography monitoring equipment can determine whether there is any abnormality based on the above analysis results.

[0063] In one embodiment, based on a second comparison result between the above-mentioned analysis results and the preset analysis results corresponding to the preset mixed standard gas, it is determined whether there is an abnormality in the detection results corresponding to the oil chromatography monitoring device. This includes: comparing the spectral information in the acquired current self-calibration analysis results with the preset analysis results corresponding to the preset mixed standard gas, and determining whether there is a deviation in the oil chromatography monitoring device that needs correction. If the second comparison result shows that the retention time in the above-mentioned current self-calibration analysis results is not within the preset retention time threshold range corresponding to the preset mixed standard gas, or the peak area in the above-mentioned current self-calibration analysis results is not within the maximum allowable deviation range of the preset peak area corresponding to the preset mixed standard gas, then it is determined that the detection results indicate that the oil chromatography monitoring device is abnormal and requires alarm and maintenance. If the second comparison result shows that the retention time in the above-mentioned current self-calibration analysis results is within the threshold range corresponding to the preset mixed standard gas, then it is determined that there is an abnormality in the oil chromatography monitoring device that requires alarm and maintenance. If the peak area in the current self-calibration analysis result is not within the preset maximum allowable deviation range of the preset peak area, then the detection result indicates that the oil chromatography monitoring equipment is malfunctioning and requires alarm and maintenance. If the second comparison result shows that both the retention time and peak area in the current self-calibration analysis result are within the preset retention time threshold range and the preset normal threshold range of the gas peak area, then the oil chromatography monitoring equipment is considered to be functioning normally. If the second comparison result shows that the retention time in the current self-calibration analysis result is within the preset retention time threshold range, and the peak area in the current self-calibration analysis result is not within the preset peak area threshold range but is within the preset maximum allowable deviation range of the peak area, then the detection result indicates that the oil chromatography monitoring equipment has a deviation and needs correction. The preset normal threshold range of the gas peak area is within the preset maximum allowable deviation range of the peak area.

[0064] In this embodiment, the oil chromatography monitoring device, after obtaining the retention time and peak area through self-calibration, can compare them with the preset retention time threshold, preset normal gas peak area threshold, and preset maximum allowable deviation value of the preset analysis results to determine whether the oil chromatography monitoring device is abnormal. For example, under the set chromatographic analysis conditions, each gas component has a corresponding retention time. The oil chromatography monitoring device performs qualitative analysis on each gas based on the retention time, determining that the retention time is within the corresponding preset retention time threshold range before peak area comparison can be performed. Then, for each gas component corresponding to each retention time, the oil chromatography monitoring device can compare the peak area of ​​each gas component with the preset normal gas peak area threshold and the preset maximum allowable deviation value of the preset peak area to determine whether the oil chromatography monitoring device needs correction or requires alarm and maintenance.

[0065] Specifically, the oil chromatography monitoring device compares the spectral information in the current self-calibration analysis results obtained above with the preset analysis results corresponding to the preset mixed standard gas, and determines whether the oil chromatography monitoring device has any deviation that needs to be corrected.

[0066] If the second comparison result shows that the retention time in the current self-calibration analysis result is not within the preset retention time threshold range corresponding to the preset mixed standard gas, or the peak area in the current self-calibration analysis result is not within the maximum allowable deviation range of the preset peak area corresponding to the preset mixed standard gas, it indicates that the retention time is inaccurate or the peak area measurement value deviates too much. Therefore, it can be determined that the above detection result indicates that the oil chromatography monitoring equipment is abnormal and requires alarm and maintenance.

[0067] If the second comparison result shows that the retention time in the current self-calibration analysis result is within the preset retention time threshold range, and the peak area in the current self-calibration analysis result is not within the preset maximum allowable deviation range of peak area, then it indicates that the retention time is relatively accurate, but the measured value of the peak area deviates too much. In this case, it can be determined that the above detection result indicates that the oil chromatography monitoring equipment is abnormal and requires alarm and maintenance.

[0068] If the second comparison result shows that the retention time and peak area in the current self-calibration analysis are both within the preset retention time threshold range and the preset normal gas peak area threshold range, it indicates that the measured values ​​of retention time and peak area are relatively accurate, and it can be determined that the oil chromatography monitoring equipment is normal.

[0069] If the second comparison result shows that the retention time in the current self-calibration analysis result is within the preset retention time threshold range, and the peak area in the current self-calibration analysis result is not within the preset normal peak area threshold range, but is still within the preset maximum allowable deviation range for peak area, then it indicates that the retention time measurement is relatively accurate, and the peak area measurement has a deviation, but the deviation is not significant and can be corrected. Therefore, it can be determined that the above detection result indicates a deviation in the oil chromatography monitoring equipment that needs correction. The retention time threshold range, the preset normal gas peak area threshold range, and the preset maximum allowable deviation range for peak area can all be set according to actual conditions.

[0070] Specifically, such as Figure 2 As shown, Figure 2This is a structural block diagram of self-calibration in one embodiment. The oil chromatography monitoring device includes a self-calibration unit, which includes a preset capacity standard gas acquisition module, a standard gas component detection and analysis module, a standard gas component data processing module, and a standard gas component result output module. The workflow of the self-calibration unit includes: (1) acquiring a preset capacity of mixed standard gas from a pre-stored standard gas cylinder in the oil chromatography monitoring device through the standard gas acquisition module, i.e., the aforementioned preset mixed standard gas; (2) performing chromatographic analysis on the acquired preset capacity mixed standard gas components according to the pre-stored gas analysis method; (3) performing data analysis and processing on the chromatogram of the mixed standard gas through the standard gas component data processing module; (4) returning the self-calibration result through the standard gas component result output module, including standard gas component concentration, retention time, peak area, and deviation data, and outputting the self-calibration result through the standard gas component result output module to obtain the aforementioned detection result. The above self-calibration process achieves accurate measurement of the oil chromatography monitoring device through the pre-stored mixed standard gas.

[0071] Through the above embodiments, when the oil chromatography monitoring device detects an abnormality in the measurement result of methane in the ambient air, it performs chromatographic analysis on a pre-stored preset mixed standard gas, compares the analysis result with the preset analysis result corresponding to the preset mixed standard gas, and realizes the detection and judgment of whether the oil chromatography monitoring device is abnormal. This not only ensures the accuracy of abnormal detection of the oil chromatography monitoring device, but also captures the abnormality of the oil chromatography monitoring device in real time, thus improving the timeliness of notifying the abnormality of the oil chromatography monitoring device.

[0072] In one embodiment, after determining whether the detection result of the oil chromatography monitoring device is abnormal based on a second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas, the method further includes: if the detection result indicates that the oil chromatography monitoring device is abnormal and requires alarm and maintenance, then based on the second comparison result, outputting corresponding alarm information to enable relevant personnel to perform abnormal repair; if the detection result indicates that the oil chromatography monitoring device deviates and needs correction, then based on the second comparison result, determining the deviation value between the current self-calibration analysis result and the preset analysis result; determining the corresponding self-correction coefficient based on the deviation value; and, based on the self-correction coefficient, causing the oil chromatography monitoring device to automatically correct the results of subsequent routine tests, with the result reported by the oil chromatography monitoring device being the detection result corrected according to the self-correction coefficient.

[0073] In this embodiment, anomalies in the oil chromatography monitoring equipment include those requiring alarms and maintenance, as well as deviations requiring correction. If the detection result indicates an anomaly requiring alarms and maintenance in the oil chromatography monitoring equipment, it means the detection accuracy of the equipment has a significant deviation. In this case, corresponding alarm information, such as the deviation value, can be output based on the second comparison result to enable the relevant personnel to perform the necessary repairs.

[0074] After determining, based on the second comparison result, that the oil chromatography monitoring device's detection result shows a deviation requiring correction, it indicates that although the oil chromatography monitoring device has a deviation, it is not serious and can perform self-correction. That is, the oil chromatography monitoring device can correct the abnormal deviation values ​​of the detected gas components. For example, the oil chromatography monitoring device can determine the deviation value between the current self-calibration analysis result and the preset analysis result based on the second comparison result; and determine the corresponding self-correction coefficient based on the deviation value. The self-correction coefficient represents the coefficient used to restore the deviation value of the detected gas components to the true value. Based on the self-correction coefficient, the oil chromatography monitoring device automatically corrects the results of subsequent routine tests. The result reported by the oil chromatography monitoring device is the detection result corrected according to the self-correction coefficient, making the chromatographic analysis results of the gas as close as possible to the true analysis results. The results of subsequent routine tests indicate the results obtained by the oil chromatography monitoring device after determining and correcting with the self-correction coefficient, combined with the self-correction coefficient, when performing subsequent chromatographic analysis of the gas.

[0075] Specifically, such as Figure 3 As shown, Figure 3This is a flowchart illustrating the self-correction step in one embodiment. The oil chromatography monitoring device may include a self-correction unit. The workflow of the self-correction unit includes: (1) verifying the self-calibrated analysis results output by the self-calibration unit against the pre-stored standard values ​​of the standard gas (preset analysis results); (2) determining whether the self-calibration results exceed the system's allowable deviation limits based on the pre-set allowable deviation limits of the oil chromatography monitoring device (preset retention time threshold, preset maximum allowable deviation threshold for peak area, preset normal threshold for gas peak area); (3) if the self-calibrated gas peak area result does not exceed the maximum allowable deviation range of the online oil chromatography monitoring device (preset maximum allowable deviation threshold range for peak area), but exceeds the normal deviation range, the system automatically calculates the self-correction coefficient and uploads the correction coefficient to the data processing unit to complete the self-correction process; if the deviation of the self-calibration result is found to be within the maximum allowable deviation range of the online oil chromatography monitoring device and does not exceed the normal deviation range, no processing is required; if the self-calibration result exceeds the maximum allowable deviation range of the online oil chromatography monitoring device, the online oil chromatography monitoring system issues an alarm, reports data, and the device needs maintenance or repair. The normal deviation range can be determined based on the retention time and peak area of ​​each gas component in the preset standard gas.

[0076] Through this embodiment, the oil chromatography monitoring equipment can use the deviation between the self-calibration analysis results and the preset analysis results to determine the self-correction coefficient and perform self-correction on the oil chromatography monitoring equipment, thereby improving the efficiency of maintaining the oil chromatography monitoring equipment.

[0077] In one exemplary embodiment, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the anomaly detection system for an oil chromatography monitoring device in one embodiment. In this embodiment, the system includes a power system transformer, an oil chromatography monitoring device, and an integrated remote monitoring platform for oil chromatography. The oil chromatography monitoring device includes an oil-gas separation unit, a standard gas inlet unit, an ambient air inlet unit, a sample gas acquisition unit, a gas detection unit, a chromatographic data acquisition unit, a data processing unit, a data diagnosis and early warning unit, a self-calibration unit, and a self-correction unit. Each independent unit includes a control module and a data transmission module. The oil chromatography monitoring device communicates with the remote monitoring platform through an auxiliary control module and a communication control module.

[0078] The process of detection by oil chromatography monitoring equipment can be as follows: Figure 5 As shown, Figure 5This is a flowchart illustrating an anomaly detection method for an oil chromatography monitoring device based on methane response in another embodiment. It includes: receiving ambient air into the oil chromatography monitoring device via an ambient air intake unit; detecting methane in the ambient air; and saving information such as the methane detection spectrum, retention time, and peak area; determining deviations in the real-time methane monitoring results based on a pre-stored methane response benchmark value (preset methane benchmark value); and issuing a deviation warning when the methane monitoring response deviates from the allowable range of its benchmark value, triggering the self-calibration unit to start operation.

[0079] The standard gas inlet unit is used to obtain a pre-stored mixed standard gas (pre-mixed standard gas) of a preset capacity from a pre-stored standard gas bottle. This is used to self-calibrate the oil chromatography monitoring equipment, thereby accurately measuring the status of the online oil chromatography monitoring system. The self-calibration results are then compared with the preset analysis results of the standard gas to obtain a second comparison result.

[0080] If the deviation of the self-calibration result is within the maximum permissible deviation range of the online oil chromatography monitoring device, but exceeds the normal deviation range, it indicates that the equipment is operating basically normally, but a deviation has occurred, requiring correction. In this case, the system activates the self-correction unit, calculates the correction coefficient, and uploads it to the data processing unit, completing the self-correction. If the deviation of the self-calibration result is within the maximum permissible deviation range of the online oil chromatography monitoring device, but does not exceed the normal deviation range, no processing is required. If the deviation of the self-calibration result exceeds the maximum permissible deviation range of the online oil chromatography monitoring device, it indicates a malfunction in the equipment, and the system will report the data to the integrated oil chromatography monitoring platform.

[0081] The ambient air intake unit is used to introduce ambient air and measure methane in the ambient air in real time. During the operation of the oil chromatography monitoring equipment, the frequency of methane measurement in the ambient air can be set as needed, such as once a day. The deviation limits for the aforementioned methane (the retention time and peak area threshold range corresponding to the preset methane reference value) are stored in the data diagnostic and early warning unit.

[0082] The self-calibration unit comprises four modules: a preset capacity standard gas acquisition module, used to acquire a preset capacity of gas from a mixed standard gas bottle; a standard gas component detection and analysis module, used to perform chromatographic analysis on the acquired preset capacity mixed standard gas according to a pre-stored analysis method to obtain a chromatogram of the mixed standard gas; a standard gas component data processing module, used to analyze the chromatogram of the mixed standard gas, extract key characteristic parameters such as H2, CH4, C2H2, C2H4, C2H6, CO, and CO2 through chromatographic peak identification and integral calculation, and calculate the deviation; and a standard gas component result output module, used to output and save data information such as the concentration, retention time, peak area, and deviation of the mixed standard gas.

[0083] The self-correction unit's workflow includes: (1) verifying the self-calibration analysis results output by the self-calibration unit against the preset analysis results of the pre-stored standard gas, that is, verifying the obtained self-calibration data analysis results against the previous calibration results of the online oil chromatography monitoring device; (2) determining whether the self-calibration results exceed the maximum allowable deviation limit of the system based on the preset allowable deviation limit of the online oil chromatography monitoring device; (3) if the self-calibration results do not exceed the maximum allowable deviation range of the online oil chromatography monitoring device and are within the normal deviation range, it is determined to be a normal fluctuation of the online oil chromatography monitoring device itself and no processing is required; if the self-calibration results do not exceed the maximum allowable deviation range of the online oil chromatography monitoring device but exceed the normal deviation range, the system automatically calculates the self-correction coefficient and uploads the correction coefficient to the data processing unit to complete the self-correction process; if the self-calibration results exceed the maximum allowable deviation range of the online oil chromatography monitoring device, the online oil chromatography monitoring system issues an alarm prompt, reports data, and prompts the equipment to be maintained or repaired.

[0084] Oil chromatography monitoring equipment can also perform abnormality detection processes such as... Figure 6 As shown, Figure 6This is a flowchart illustrating the abnormal detection method of an oil chromatography monitoring device based on methane response in another embodiment. After the device is started, (1) it is preheated and run until the oil chromatography baseline is stable; (2) ambient air is introduced through the ambient air intake unit, and the methane concentration in the ambient air is monitored by the oil chromatography system. The obtained methane monitoring data is then verified; (3) based on the methane response baseline and the allowable deviation limit (first comparison result), it is determined whether the methane response in the monitored ambient air has deviated; (4) if the result is "no deviation," the device is considered normal; (5) the online oil chromatography monitoring system is activated for normal monitoring, that is, the gas separated from the transformer oil is introduced through the sample gas acquisition unit and enters the online oil chromatography monitoring device for monitoring, thus monitoring the transformer's operating status; (6) if the result is "deviation," the device is considered to have deviated, and the online oil chromatography monitoring system automatically issues a warning signal; (7) the self-calibration unit is activated, and the methane concentration in the ambient air is monitored by the sample gas acquisition unit. The standard gas inlet unit introduces the mixed standard gas pre-stored in the gas cylinder to self-calibrate the oil chromatography online monitoring device and further verify the results of methane concentration monitoring in ambient air. (8) Based on the standard value of the standard gas and the allowable deviation limit set by the oil chromatography monitoring device, the self-check deviation exceeds the allowable range. (9) If the result is "no" but does not exceed the normal deviation range, no processing is required and the process returns to step (5). If the result exceeds the normal deviation range, the device is determined to be normal but needs to be corrected. The self-correction unit is started, the correction coefficient is calculated and uploaded to the data processing unit. After the self-correction process is completed, the process returns to step (2) to monitor ambient air methane and follow up on subsequent steps. (10) If the result is "yes", the device is determined to be faulty. The system reports the data to the integrated oil chromatography monitoring platform. After the equipment maintenance or repair is completed, the process returns to step (1). If the oil chromatography online monitoring system is set to monitor ambient air methane once a day and the methane monitoring for the day has been completed, the monitoring process does not need to enter step (2) every time, and can directly enter step (5).

[0085] Through the above embodiments, by first combining the preset methane benchmark value and the methane in the ambient air collected by the oil chromatography monitoring device, the deviation of the methane response analysis of the oil chromatography monitoring device is detected. When an abnormality in the methane spectrum response information is detected, the abnormality of the oil chromatography monitoring device is detected and judged based on the analysis results of the preset mixed standard gas and the preset analysis results of the oil chromatography monitoring device. This not only ensures the accuracy of the abnormality detection of the oil chromatography monitoring device, but also captures the abnormality of the oil chromatography monitoring device in real time, thus improving the timeliness of the detection of abnormality of the oil chromatography monitoring device.

[0086] Through the embodiments of this application, the back-end staff of the integrated oil chromatography monitoring platform can observe the operating status of the oil chromatography monitoring equipment at any time, keep abreast of the equipment's operation, and obtain equipment deviation or fault information in a timely manner. This facilitates the timely organization of personnel for on-site equipment maintenance or repair, preventing minor faults in the online oil chromatography monitoring equipment from going undetected and handled, thus preventing the transformer's operating status from escalating out of monitoring. Not only can the real-time operating status of the oil chromatography monitoring equipment be obtained, allowing for timely warnings and handling of equipment deviations, but it can also detect equipment faults immediately, facilitating the organization of repairs. This ensures the stability and reliability of online oil chromatography monitoring data while preventing minor equipment faults in the transformer from escalating into major accidents.

[0087] By real-time monitoring and chromatographic analysis of methane in ambient air, a correlation is established between ambient methane spectral response information and the status of online oil chromatography monitoring equipment. This enables timely early warning and self-correction of deviations caused by the equipment, solving the problem of equipment failures occurring during calibration intervals not being detected and addressed in a timely manner during practical applications. Consequently, the accuracy and stability of online oil chromatography monitoring results are improved, ensuring the safe operation of power system transformers.

[0088] Furthermore, by introducing methane, which has a stable concentration in ambient air, as the basis for real-time monitoring and calibration of oil chromatography monitoring equipment, the methane in ambient air is detected and calibrated at a set frequency, such as once a day. This monitors the operating status of the chromatographic detection section (gas detection unit, chromatographic data acquisition unit, etc.) in the oil chromatography monitoring equipment, greatly compensating for the technical defects of existing oil chromatography monitoring equipment, such as blind spots and management gaps in equipment operation during the interval between two calibrations (1 to 2 years).

[0089] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0090] Based on the same inventive concept, this application also provides a methane-responsive oil chromatography monitoring equipment anomaly detection device for implementing the above-described methane-responsive oil chromatography monitoring equipment anomaly detection method. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more methane-responsive oil chromatography monitoring equipment anomaly detection device embodiments provided below can be found in the limitations of the methane-responsive oil chromatography monitoring equipment anomaly detection method described above, and will not be repeated here.

[0091] In one exemplary embodiment, such as Figure 7 As shown, an anomaly detection device for oil chromatography monitoring equipment based on methane response is provided, comprising: a first acquisition module 500, a first comparison analysis module 502, a second acquisition module 504, and a second comparison analysis module 506, wherein:

[0092] The first acquisition module 500 is used to acquire ambient air through the ambient air intake unit of the oil chromatography monitoring device to be detected and to perform chromatographic analysis on the methane in the ambient air to obtain the methane spectrum response information corresponding to the methane.

[0093] The first comparison analysis module 502 is used to obtain a first comparison result between the methane spectrum response information and the spectrum data corresponding to the methane preset reference value based on the methane preset reference value corresponding to the oil chromatography monitoring equipment.

[0094] The second acquisition module 504 is used to initiate self-calibration if the methane spectrum response information is found to be abnormal based on the first comparison result, and to perform self-calibration analysis on the preset mixed standard gas to obtain the corresponding spectrum analysis results.

[0095] The second comparison analysis module 506 is used to obtain a second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas, and to determine whether there is any abnormality in the detection result of the oil chromatography monitoring device.

[0096] In one embodiment, the first comparison analysis module 502 is used to query a historical record database to obtain the operation records corresponding to the oil chromatography monitoring device; the operation records include the installation records, maintenance records, and calibration records corresponding to the oil chromatography monitoring device; based on the installation records, the first measurement value of methane in the ambient air after the installation of the oil chromatography monitoring device is determined to obtain a first preset methane reference value, and the spectral data corresponding to the first preset methane reference value includes retention time and peak area; based on the maintenance records, the first measurement value of methane in the ambient air after maintenance of the oil chromatography monitoring device is determined. The first methane preset reference value is obtained by determining the first methane value in the ambient air after calibration of the oil chromatography monitoring equipment, and the spectral data corresponding to the second methane preset reference value includes retention time and peak area. The second methane preset reference value is obtained by determining the first methane preset reference value in the ambient air after calibration of the oil chromatography monitoring equipment, and the spectral data corresponding to the third methane preset reference value includes retention time and peak area. The third methane preset reference value is obtained by determining the first methane preset reference value, the second methane preset reference value, and the third methane preset reference value, and the spectral data corresponding to the methane preset reference value includes retention time and peak area.

[0097] In one embodiment, the first comparison analysis module 502 is used to obtain the first retention time and the first peak area corresponding to methane in the ambient air based on the methane spectrum response information; and to obtain the comparison result between the first retention time and the first peak area and the retention time and peak area threshold range corresponding to the preset benchmark value of methane, as the first comparison result.

[0098] In one embodiment, the above-mentioned device further includes: a judgment module, configured to determine that the methane spectrum response information is abnormal if the first comparison result shows that the first retention time is not within the retention time threshold range corresponding to the methane preset reference value; and to determine that the methane spectrum response information is abnormal if the first comparison result shows that the first retention time is within the retention time threshold range corresponding to the methane preset reference value, but the first peak area is not within the peak area threshold range corresponding to the methane preset reference value.

[0099] In one embodiment, the second acquisition module 504 is used to perform chromatographic analysis on the preset mixed standard gas to obtain the self-calibration retention time and self-calibration peak area corresponding to each gas component in the preset mixed standard gas; and to obtain the current self-calibration analysis result based on the self-calibration retention time and self-calibration peak area.

[0100] In one embodiment, the second comparison analysis module 506 is used to compare the spectral information in the acquired current self-calibration analysis result with the preset analysis result corresponding to the preset mixed standard gas, and to determine whether the oil chromatography monitoring device has a deviation that needs correction; if the second comparison result shows that the retention time in the current self-calibration analysis result is not within the preset retention time threshold range corresponding to the preset mixed standard gas, or the peak area in the current self-calibration analysis result is not within the maximum allowable deviation range of the preset peak area corresponding to the preset mixed standard gas, then it is determined that the detection result indicates that the oil chromatography monitoring device has an abnormality and needs alarm and maintenance; if the second comparison result shows that the retention time in the current self-calibration analysis result is within the preset retention time threshold range, then it is determined that the oil chromatography monitoring device has an abnormality that needs alarm and maintenance. If the peak area in the current self-calibration analysis result is not within the preset maximum allowable deviation range of the peak area, then the detection result indicates that the oil chromatography monitoring equipment is malfunctioning and requires alarm and maintenance. If the second comparison result shows that both the retention time and peak area in the current self-calibration analysis result are within the preset retention time threshold range and the preset normal gas peak area threshold range, then the oil chromatography monitoring equipment is considered to be functioning normally. If the second comparison result shows that the retention time in the current self-calibration analysis result is within the preset retention time threshold range, the peak area in the current self-calibration analysis result is not within the preset normal peak area threshold range, but is within the preset maximum allowable deviation range of the peak area, then the detection result indicates that the oil chromatography monitoring equipment has deviated and needs correction.

[0101] In one embodiment, the device further includes: a correction module, configured to: if the detection result indicates that the oil chromatography monitoring device is malfunctioning and requires alarm and maintenance, output corresponding alarm information based on the second comparison result so that relevant personnel can perform malfunction repair; if the detection result indicates that the oil chromatography monitoring device is deviating and requires correction, determine the deviation value between the current self-calibration analysis result and the preset analysis result based on the second comparison result; determine the corresponding self-correction coefficient based on the deviation value; and, based on the self-correction coefficient, enable the oil chromatography monitoring device to automatically correct the results of subsequent routine tests; the result reported by the oil chromatography monitoring device is the detection result corrected according to the self-correction coefficient.

[0102] The various modules in the above-mentioned methane-responsive oil chromatography monitoring equipment anomaly detection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0103] In one exemplary embodiment, a computer device is provided, which may be an oil chromatography monitoring device, and its internal structure diagram may be as follows. Figure 8 As shown, the computer device includes a processor, memory, input / output interfaces, a communication interface, a display unit, and an input device. The processor, memory, and input / output interfaces are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interfaces are used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements an anomaly detection method for oil chromatography monitoring equipment based on methane response. The display unit of the computer device is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0104] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0105] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method described above.

[0106] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described above.

[0107] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method described above.

[0108] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0109] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0110] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 application.

[0111] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for detecting anomalies in an oil chromatography monitoring device based on methane response, characterized in that, The method includes: The ambient air is acquired through the ambient air intake unit of the oil chromatography monitoring device to be tested, and the methane in the ambient air is analyzed by chromatography to obtain the methane spectrum response information corresponding to the methane. Based on the preset methane reference value corresponding to the oil chromatography monitoring device, a first comparison result is obtained between the methane spectral response information and the spectral data corresponding to the preset methane reference value. If the methane spectrum response information is determined to be abnormal based on the first comparison result, then self-calibration is initiated based on the preset mixed standard gas, and self-calibration analysis is performed on the preset mixed standard gas to obtain the corresponding current self-calibration analysis result; Based on the second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas, it is determined whether there is an abnormality in the detection result of the oil chromatography monitoring device.

2. The method according to claim 1, characterized in that, The step of obtaining the preset methane reference value corresponding to the oil chromatography monitoring device includes: Query the historical record database to obtain the operation records corresponding to the oil chromatography monitoring equipment; the operation records include the installation records, maintenance records and calibration records corresponding to the oil chromatography monitoring equipment. Based on the installation record, the first measurement value of methane in the ambient air after the installation of the oil chromatography monitoring equipment is determined, and a first preset reference value for methane is obtained. The spectral data corresponding to the first preset reference value for methane includes retention time and peak area. Based on the maintenance record, the first measurement value of methane in the ambient air after the maintenance of the oil chromatography monitoring equipment is determined, and a second preset reference value for methane is obtained. The spectral data corresponding to the second preset reference value for methane includes retention time and peak area. Based on the calibration record, the first measurement value of methane in the ambient air after calibration of the oil chromatography monitoring equipment is determined, and the third methane preset reference value is obtained. The spectral data corresponding to the third methane preset reference value includes retention time and peak area. The methane preset reference value is obtained based on one or more of the first methane preset reference value, the second methane preset reference value, and the third methane preset reference value. The spectral data corresponding to the methane preset reference value includes retention time and peak area.

3. The method according to claim 1, characterized in that, The first comparison result of obtaining the methane spectral response information and the spectral data corresponding to the preset methane reference value includes: Based on the methane spectrum response information, the first retention time and the first peak area corresponding to methane in the ambient air are obtained; The comparison result between the first retention time and the first peak area and the retention time and peak area threshold range corresponding to the preset methane reference value is obtained as the first comparison result.

4. The method according to claim 3, characterized in that, After obtaining the first comparison result between the methane spectrum response information and the preset methane reference value, the method further includes: If the first comparison result shows that the first retention time is not within the retention time threshold range corresponding to the preset benchmark value of methane, then it is determined that the methane spectrum response information is abnormal. If the first comparison result shows that the first retention time is within the retention time threshold range corresponding to the preset methane reference value, but the first peak area is not within the peak area threshold range corresponding to the preset methane reference value, then the methane spectrum response information is determined to be abnormal.

5. The method according to claim 1, characterized in that, The preset analysis results corresponding to the preset mixed standard gas include the concentration of each gas component in the preset mixed standard gas and the corresponding chromatographic data. The chromatographic data includes retention time and peak area, and preset retention time threshold range, preset maximum allowable deviation range of peak area and preset normal threshold range of gas peak area. The step of performing self-calibration analysis on the preset mixed standard gas to obtain the corresponding current self-calibration analysis result includes: Chromatographic analysis of the preset mixed standard gas was performed to obtain the self-calibration retention time and self-calibration peak area of ​​each gas component in the preset mixed standard gas. The current self-calibration analysis result is obtained based on the self-calibration retention time and the self-calibration peak area; The step of determining whether the detection results of the oil chromatography monitoring device are abnormal based on a second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas includes: By comparing the spectral information in the current self-calibration analysis results with the current self-calibration analysis results of the oil chromatography monitoring device and the preset analysis results corresponding to the preset mixed standard gas, it is determined whether the oil chromatography monitoring device has any deviation that needs to be corrected. If the second comparison result shows that the retention time in the current self-calibration analysis result is not within the preset retention time threshold range corresponding to the preset mixed standard gas, or the peak area in the current self-calibration analysis result is not within the maximum allowable deviation range of the preset peak area corresponding to the preset mixed standard gas, then it is determined that the oil chromatography monitoring equipment is abnormal and needs to be alarmed and maintained. If the second comparison result shows that the retention time in the current self-calibration analysis result is within the preset retention time threshold range, while the peak area in the current self-calibration analysis result is not within the preset maximum allowable deviation range of peak area, then the detection result indicates that the oil chromatography monitoring equipment is abnormal and requires alarm and maintenance. If the second comparison result shows that the retention time and peak area in the current self-calibration analysis result are both within the preset retention time threshold range and the preset normal gas peak area threshold range, then the oil chromatography monitoring equipment is judged to be normal. If the second comparison result shows that the retention time in the current self-calibration analysis result is within the preset retention time threshold range, and the peak area in the current self-calibration analysis result is not within the preset normal peak area threshold range, but within the preset maximum allowable deviation range of peak area, then it is determined that the detection result indicates that the oil chromatography monitoring device has a deviation and needs to be corrected. The normal threshold range of the preset gas peak area is within the maximum allowable deviation range of the preset peak area.

6. The method according to any one of claims 1 to 5, characterized in that, After determining whether the detection results of the oil chromatography monitoring device are abnormal based on the second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas, the method further includes: If the detection result indicates that the oil chromatography monitoring equipment is malfunctioning and requires alarm and maintenance, then based on the second comparison result, the corresponding alarm information is output so that the relevant personnel can perform the malfunction repair. If the detection result indicates that the oil chromatography monitoring device has a deviation that needs to be corrected, then the deviation value between the current self-calibration analysis result and the preset analysis result is determined based on the second comparison result; Determine the corresponding self-correction coefficient based on the deviation value; Based on the self-correction coefficient, the oil chromatography monitoring device automatically corrects the results of subsequent routine tests; the result reported by the oil chromatography monitoring device is the test result corrected according to the self-correction coefficient.

7. An anomaly detection device for oil chromatography monitoring equipment based on methane response, characterized in that, The device includes: The first acquisition module is used to acquire ambient air through the ambient air intake unit of the oil chromatography monitoring device to be detected and to perform chromatographic analysis on the methane in the ambient air to obtain the methane spectrum response information corresponding to the methane. The first comparison and analysis module is used to obtain a first comparison result between the methane spectrum response information and the spectrum data corresponding to the methane preset reference value based on the methane preset reference value corresponding to the oil chromatography monitoring device; The second acquisition module is used to initiate self-calibration based on a preset mixed standard gas if the methane spectrum response information is determined to be abnormal according to the first comparison result, and to perform self-calibration analysis on the preset mixed standard gas to obtain the corresponding spectrum analysis result. The second comparison analysis module is used to obtain a second comparison result between the current self-calibration analysis result of the preset mixed standard gas and the preset analysis result corresponding to the preset mixed standard gas, and to determine whether there is any abnormality in the detection result of the oil chromatography monitoring device.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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