Control method and device for oil chromatography on-line monitoring device

Abstract

The invention discloses an oil chromatography on-line monitoring device control method and device, and relates to the technical field of transformer oil chromatography, and the method comprises the following steps: obtaining first hydrogen detection data collected by a single hydrogen sensor at a current sampling moment; the oil chromatography online monitoring device is connected with a transformer through an oil inlet pipeline and an oil return pipeline, and the single hydrogen sensor is arranged on the oil inlet pipeline; and under the condition that the first hydrogen detection data meets the triggering condition, controlling the oil chromatography online monitoring device to execute multi-gas detection. The single hydrogen sensor is additionally arranged in the oil chromatography on-line monitoring device and used for rapidly and continuously detecting the content of hydrogen in the transformer body oil, problems can be found in time, the detection period of the transformer oil chromatography on-line monitoring device can be shortened and stabilized, and therefore the consumables and the operation and maintenance cost can be reduced to 40% or above, and the detection efficiency of the transformer oil chromatography on-line monitoring device is improved. And the service life of the device is prolonged by more than 50%.

Description

Technical Field

[0001] This application relates to the field of transformer oil chromatography technology, and in particular to a control method and apparatus for an online oil chromatography monitoring device. Background Technology

[0002] Transformers are key equipment in power grid operation, and their operational reliability is fundamental to the safety and stability of the power system. Domestic transformers are characterized by high voltage levels, large numbers, and wide distribution. Stable transformer operation primarily relies on online monitoring technologies, such as dissolved gas monitoring in oil, partial discharge monitoring, and core grounding current monitoring. Dissolved gas monitoring in oil can be further categorized based on different detection principles, including oil chromatography, photoacoustic spectroscopy, and monitoring of small components (such as single hydrogen monitoring and single acetylene monitoring).

[0003] Transformer oil chromatographic online monitoring devices are precision instruments used to detect relevant data from multiple gases. Because these devices require high-purity carrier gas as a medium during detection, and this gas must be stored in cylinders, these cylinders typically need to be replaced approximately once a year, achieving rapid and continuous monitoring of gas changes in transformer oil requires increasing the frequency of operation. Each additional operation consumes more carrier gas, necessitating more frequent replacement of the gas cylinders. This results in a higher workload and cost for the later maintenance of the oil chromatographic online monitoring device. Summary of the Invention

[0004] The main purpose of this application is to provide a control method and apparatus for an online oil chromatography monitoring device, which aims to solve the technical problem of high maintenance costs caused by frequent operation of the online oil chromatography monitoring device.

[0005] To achieve the above objectives, this application proposes a control method for an online oil chromatography monitoring device, the control method comprising:

[0006] The first hydrogen detection data collected by the single hydrogen sensor at the current sampling time is obtained; the oil chromatography online monitoring device is connected to the transformer through the oil inlet pipeline and the oil return pipeline, and the single hydrogen sensor is set in the oil inlet pipeline;

[0007] If the first hydrogen detection data meets the triggering condition, the online oil chromatography monitoring device is controlled to perform multi-gas detection.

[0008] In one embodiment, the triggering condition includes:

[0009] The first hydrogen detection data exceeds a preset threshold; and / or

[0010] The hydrogen detection data shows an increasing trend at the current sampling time, and the hydrogen detection data is obtained based on the first hydrogen detection data and historical hydrogen detection data.

[0011] In one embodiment, after controlling the online oil chromatography monitoring device to perform multi-gas detection when the first hydrogen detection data meets the triggering condition, the online oil chromatography monitoring device control method further includes:

[0012] The first hydrogen detection data is compared with the second hydrogen detection data to obtain the hydrogen deviation value; wherein, the second hydrogen detection data is obtained by the oil chromatography online monitoring device performing the multi-gas detection acquisition;

[0013] If the hydrogen deviation value is within the first preset hydrogen deviation range, the second hydrogen detection data is adjusted to obtain the final hydrogen detection data.

[0014] In one embodiment, adjusting the second hydrogen detection data to obtain the final hydrogen detection data includes:

[0015] The hydrogen deviation value is adjusted to a second preset hydrogen deviation range to obtain the final hydrogen detection data; wherein, the maximum positive value of the second preset hydrogen deviation range is less than the maximum positive value of the first preset hydrogen deviation range, and the minimum negative value of the second preset hydrogen deviation range is greater than the minimum positive value of the first preset hydrogen deviation range.

[0016] In one embodiment, after obtaining the hydrogen deviation value, the control method for the online oil chromatography monitoring device further includes:

[0017] If the hydrogen deviation value is within the second hydrogen preset deviation range, the average value of the first hydrogen detection data and the second hydrogen detection data is taken; wherein, the maximum positive value of the second hydrogen preset deviation range is less than the maximum positive value of the first hydrogen preset deviation range, and the minimum negative value of the second hydrogen preset deviation range is greater than the minimum positive value of the first hydrogen preset deviation range.

[0018] The average value is used as the final hydrogen detection data.

[0019] In one embodiment, after controlling the online oil chromatography monitoring device to perform multi-gas detection, the online oil chromatography monitoring device control method further includes:

[0020] Obtain detection data of multiple gases collected by an online oil chromatography monitoring device;

[0021] When the hydrogen deviation value is within the preset deviation range of the first set of multiple gases, the detection data of the multiple gases are adjusted according to the hydrogen deviation value to obtain the final detection data of the multiple gases.

[0022] Furthermore, to achieve the above objectives, this application also proposes an online oil chromatography monitoring device, which is connected to a transformer via an oil inlet pipeline and an oil return pipeline. The online oil chromatography monitoring device includes:

[0023] A single hydrogen sensor, wherein the single hydrogen sensor is disposed in the oil inlet line; and

[0024] A control module connected to the single hydrogen sensor, the control module comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the online oil chromatography monitoring device control method as described above.

[0025] In one embodiment, the online oil chromatography monitoring device further includes:

[0026] A single hydrogen sensor mounting component, wherein a sensor mounting cavity is defined within the single hydrogen sensor mounting component, and the single hydrogen sensor mounting component has an oil inlet and an oil outlet communicating with the sensor mounting cavity, and both the oil inlet and the oil outlet are connected to the oil inlet pipeline;

[0027] At least a portion of the single hydrogen sensor is disposed within the sensor mounting cavity.

[0028] In one embodiment, the online oil chromatography monitoring device further includes: an oil pump, the oil pump being disposed in the oil inlet pipeline for driving transformer oil into the sensor mounting cavity; and

[0029] The single hydrogen sensor mounting component also includes:

[0030] A first oil inlet valve and / or a first oil return valve, wherein the first oil inlet valve is located at the oil inlet and the first oil return valve is located at the oil outlet.

[0031] In one embodiment, the single hydrogen sensor is a palladium alloy film single hydrogen sensor.

[0032] One or more technical solutions proposed in this application have at least the following technical effects:

[0033] The control method for the online oil chromatography monitoring device provided in this application adds a single hydrogen sensor as a real-time monitoring means. The single hydrogen sensor is set in the oil inlet pipeline of the online oil chromatography monitoring device to quickly and continuously detect the hydrogen content in the transformer body oil. When the detected hydrogen content in the oil meets the trigger condition, the online oil chromatography monitoring device is controlled to perform multi-gas detection. This not only enables timely detection of problems, but also reduces the detection cycle of the online oil chromatography monitoring device for stable transformers. It reduces the detection frequency from once a day in related technologies to once every two to three days, or from four times a day in related technologies to once or twice a day. This can reduce consumable and maintenance costs by more than 40% and extend the service life of the device by more than 50%. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic flowchart illustrating the control method for the online oil chromatography monitoring device provided in this application embodiment;

[0037] Figure 2 This is a schematic diagram of the online transformer oil chromatography monitoring device in the embodiments of this application;

[0038] Figure 3 A simplified flowchart illustrating the control method for the online oil chromatography monitoring device provided in this application embodiment;

[0039] Figure 4 This is a schematic diagram of the control module structure involved in the control method of the online oil chromatography monitoring device in the embodiments of this application;

[0040] Figure 5 This is a schematic diagram of the structure of the single hydrogen sensor mounting component in the embodiments of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0044] In related technologies, the detection cycle of online oil chromatography monitoring devices is set to once a day or four times a day. This detection cycle cannot continuously monitor the gas content and changing trends in transformer oil. Since each detection consumes a certain amount of carrier gas, which needs to be stored in cylinders, these cylinders need to be replaced once a year under the aforementioned detection cycle. Therefore, if the online oil chromatography monitoring device is to be set to continuous detection, the cylinders need to be replaced more frequently. This increases the workload and cost of later maintenance of the online oil chromatography monitoring device. Moreover, if the cylinders are not replaced in time, the device will shut down, making it impossible to monitor changes in the gas in the transformer oil, thus affecting the operational safety of the main equipment, the transformer. In addition, the failure rate of the online oil chromatography monitoring device also increases with the number of detections.

[0045] Therefore, this application provides a control method for an online oil chromatography monitoring device. By installing a single hydrogen sensor in the oil inlet pipe of the online oil chromatography monitoring device, the hydrogen content in the transformer body oil can be rapidly and continuously detected. When the detected hydrogen content in the oil meets the triggering conditions, the online oil chromatography monitoring device is controlled to perform multi-gas detection. This not only enables timely detection of problems but also reduces the detection cycle of the online oil chromatography monitoring device for stable transformers.

[0046] Figure 1 This is a schematic flowchart of the control method for the online oil chromatography monitoring device of this application. (Refer to...) Figure 1In this embodiment, the control method for the online oil chromatography monitoring device includes steps S10 to S20:

[0047] Step S10: Obtain the first hydrogen detection data collected by the single hydrogen sensor at the current sampling time.

[0048] like Figure 2 As shown, the online oil chromatography monitoring device 100 is connected to the transformer through the oil inlet pipeline 110 and the oil return pipeline 120, and the single hydrogen sensor 131 is installed in the oil inlet pipeline 110.

[0049] In this embodiment, the execution entity can be the control module 173 of the online oil chromatography monitoring device 100, which is connected to the single hydrogen sensor 131.

[0050] The first hydrogen detection data includes the hydrogen content. In one example, the unit of the first hydrogen detection data is μL / L.

[0051] The single-hydrogen sensor 131 can refer to a sensor that can directly contact transformer oil and rapidly and continuously detect the hydrogen content in the oil. In one specific embodiment, the single-hydrogen sensor 131 is a palladium alloy film single-hydrogen sensor. The following description uses a palladium alloy film single-hydrogen sensor as an example.

[0052] In this embodiment, the selected palladium alloy membrane single-hydrogen sensor has the advantages of small size, allowing it to be installed in an oil chromatography cabinet, strong anti-interference ability, good detection reliability, and long service life (up to 10 years), making it suitable for complex background gas detection scenarios. Furthermore, the single-hydrogen sensor 131 has the advantages of small size and high accuracy.

[0053] For example, in this embodiment, the shortest detection cycle of the palladium alloy membrane single hydrogen sensor is once every 10 minutes.

[0054] The specific data acquisition process of the single hydrogen sensor 131 is as follows: When oil in the transformer body oil tank 200 is drawn from the second oil inlet valve 140 through the oil inlet pipeline 110 by the oil pump 160 to the degassing module 171 of the oil chromatography online monitoring device 100 for degassing, it flows through the single hydrogen sensor 131. After the degassing module 171 completes the degassing, the oil sample with extracted gas is pushed back to the transformer body oil tank 200 through the return oil pipeline 120 and the second return oil valve 150 by the oil pump 161. The flowing oil is detected for hydrogen by the single hydrogen sensor 131. After the reading of the single hydrogen sensor 131 stabilizes, the first hydrogen detection data is obtained.

[0055] Optionally, in this embodiment, the time for the single hydrogen sensor 131 reading to stabilize is ≥10 min. In one example, the time for the single hydrogen sensor 131 reading to stabilize is 10 min.

[0056] Understandably, by adding a single hydrogen sensor 131 to the online oil chromatography monitoring device 100, the performance and function of the online oil chromatography monitoring device 100 itself are greatly improved.

[0057] By installing the single hydrogen sensor 131 in the oil inlet pipe 110 within the online oil chromatography monitoring device 100, it can be ensured that the single hydrogen sensor 131 can come into contact with the oil flowing from the transformer body every time the online oil chromatography monitoring device 100 is supplied with oil, and that the oil in the transformer body can flow through the single hydrogen sensor 131, thereby achieving continuous and periodic detection of the hydrogen content of the transformer oil, and thus improving the real-time detection performance of the online oil chromatography monitoring device 100 itself.

[0058] The single hydrogen sensor 131 sends the first hydrogen detection data obtained from the sampling to the control module 173; or, the control module 173 reads the first hydrogen detection data collected by the single hydrogen sensor 131 in real time / periodically.

[0059] Step S20: If the first hydrogen detection data meets the triggering conditions, control the online oil chromatography monitoring device 100 to perform multi-gas detection.

[0060] The control method of the online oil chromatography monitoring device provided in this embodiment adds a single hydrogen sensor 131 as a real-time monitoring means. The single hydrogen sensor 131 is set in the oil inlet pipe 110 of the online oil chromatography monitoring device 100 for rapid and continuous detection of the hydrogen content in the transformer body oil, thereby improving the real-time detection performance of the online oil chromatography monitoring device 100 itself. When the detected hydrogen content in the oil meets the triggering conditions, the online oil chromatography monitoring device 100 is immediately controlled to perform multi-gas detection, so that multiple gases can be detected in the first time. For transformers with stable operation, the detection cycle of the online oil chromatography monitoring device 100 can be effectively reduced, from once a day for low voltage or medium voltage levels in related technologies to once every two to three days, or from four times a day for high voltage levels in related technologies to once or twice a day. This can reduce the consumable and maintenance costs of the online oil chromatography monitoring device 100 by more than 40% and extend the service life of the device by more than 50%.

[0061] Furthermore, hydrogen is one of the important gases that needs to be monitored in transformers. When a transformer experiences various faults such as discharge or overheating, hydrogen levels increase. However, the type of fault cannot be determined solely by the initial hydrogen detection data, and it's even possible that the transformer is not faulty at all. Therefore, in this embodiment, a single hydrogen sensor 131 continuously detects the hydrogen content. Once the initial hydrogen detection data shows an anomaly that meets the triggering conditions, the online oil chromatography monitoring device 100 is immediately activated to perform multi-gas detection. By combining the initial hydrogen detection data with the multi-gas detection data, it is possible to determine whether the transformer is faulty and the type of fault.

[0062] In one embodiment, the triggering conditions include: the first hydrogen detection data exceeds a preset threshold; and / or the hydrogen detection data shows an increasing trend at the current sampling time, wherein the hydrogen detection data is obtained based on the first hydrogen detection data and historical hydrogen detection data.

[0063] The historical hydrogen detection data refers to the historical data collected by the single hydrogen sensor before the first hydrogen detection data was collected at the current sampling time, and is stored in the single hydrogen sensor 131 and / or the control module 173. Specifically, the historical hydrogen detection data can be at least one hydrogen detection data collected by the single hydrogen sensor 131 within a preset time period before the current time, and the preset time period includes at least one detection cycle of the single hydrogen sensor 131.

[0064] In this embodiment, there are two scenarios where the first hydrogen detection data is abnormal. One is when the first hydrogen detection data exceeds a preset threshold, indicating a possible transformer malfunction. In this case, the online oil chromatography monitoring device 100 needs to be activated immediately to perform multi-gas detection for further fault diagnosis. This preset threshold can be a self-calibrated value to adapt to multiple transformers, or it can be a standard power value. For example, the preset threshold is 150 μL / L.

[0065] To account for other potential transformer faults, in this embodiment, the second abnormal situation is that if the current first hydrogen detection data shows an increasing trend compared to historical hydrogen detection data, it indicates a suspected transformer fault. The online oil chromatography monitoring device 100 is then activated to perform multi-gas detection to further determine if a fault exists and its type. In actual testing, as the transformer operates, the first hydrogen detection data may show an increasing trend compared to historical hydrogen detection data, but troubleshooting may reveal no fault in the transformer. Therefore, in one embodiment, the triggering condition also includes: the increasing trend exceeding a preset growth threshold.

[0066] In this embodiment, the first hydrogen detection data is greater than the previous hydrogen detection data, and the difference between the first and previous hydrogen detection data is greater than or equal to a preset growth threshold, thus meeting the triggering condition. Therefore, the control module controls the online oil chromatography monitoring device 100 to perform multi-gas detection. This preset growth threshold can be adjusted according to the specific model of the transformer.

[0067] In one example, the preset growth threshold for a common transformer is 2 μL / L, and in another embodiment, the preset growth threshold for a transformer is 10 μL / L to 100 μL / L.

[0068] In addition, since the detection cycle of the online oil chromatography monitoring device 100 is different from that of the single hydrogen sensor 131, the online oil chromatography monitoring device 100 may be in the detection cycle or in the intermittent period when the single hydrogen sensor 131 is performing detection. Therefore, in order to avoid repeatedly starting the online oil chromatography monitoring device 100.

[0069] In one embodiment, after the first hydrogen detection data meets the triggering condition, before controlling the start of the online oil chromatography monitoring device 100 to perform multi-gas detection, the online oil chromatography monitoring device control method further includes: when the online oil chromatography monitoring device 100 is not in a detection cycle, controlling the start of the online oil chromatography monitoring device 100 to perform multi-gas detection to obtain multi-gas detection data.

[0070] When performing multi-gas detection to detect multiple gases in transformer oil, a few-component oil chromatography online monitoring device can be used. This device has an integrated wall-mounted structure, does not require periodic replacement of the carrier gas, and has the advantage of being maintenance-free. It is only used to detect the content of some gases in transformer oil, such as hydrogen, methane, and ethylene. Alternatively, a multi-component oil chromatography online monitoring device can be used.

[0071] Because the few-component oil chromatography online monitoring device is an integrated structure, its permeation membrane cannot be used for a long time when degassing to separate gases in the oil, resulting in inaccurate detection of few-component gas content. Furthermore, it can only detect a limited number of gas components. Therefore, the few-component oil chromatography online monitoring device cannot accurately detect the gas content in transformer oil, nor can it detect multiple gases in the oil. Based on this, in this embodiment, the oil chromatography online monitoring device 100 is a multi-component oil chromatography online monitoring device. After performing multi-gas detection, the multi-component oil chromatography online monitoring device can collect multi-gas detection data in the current transformer oil. This multi-gas detection data includes multiple gases and the content of each gas. The multiple gases include at least one of hydrogen, methane, ethylene, ethane, acetylene, total hydrocarbons, carbon monoxide, and carbon dioxide. The total hydrocarbon content refers to the total gas content of hydrocarbon gases such as methane, ethylene, ethane, and acetylene.

[0072] It should be noted that the following description of the online oil chromatography monitoring device 100 refers to the multi-component online oil chromatography monitoring device.

[0073] In this embodiment, the online oil chromatography monitoring device 100 reduces the frequency of detection from once a day for low-voltage or medium-voltage levels in related technologies to once every two to three days, or reduces the frequency of detection from four times a day for high-voltage levels in related technologies to once or twice a day. This reduces the consumable and maintenance costs of the online oil chromatography monitoring device 100 by more than 40% and extends the device's service life by more than 50%.

[0074] Specifically, the use of carrier gas in the online oil chromatography monitoring device 100 can be reduced, thereby reducing the consumable and maintenance costs of the online oil chromatography monitoring device 100 by more than 40%.

[0075] In related technologies, online oil chromatography monitoring devices operate normally once a day, and one bottle of carrier gas can be used for one year, performing approximately 360 tests. In this embodiment, because the online oil chromatography monitoring device 100 is equipped with a single hydrogen sensor 131, which can detect the hydrogen content and changes in oil every 10 minutes, the operating cycle of the online oil chromatography monitoring device 100 can be adjusted from the original cycle. The original cycle of once a day can be reduced to once every two to three days, or the original cycle of four times a day can be reduced to once or twice a day, or even longer, without reducing the monitoring effect of the online oil chromatography monitoring device 100 on changes in the gas content in the oil. In practical applications, changes in hydrogen content also need to be considered to temporarily increase the detection frequency of the online oil chromatography monitoring device 100. In one example, the online oil chromatography monitoring device in related technologies operates normally once a day, performing approximately 360 detections per year. The online oil chromatography monitoring device 100 provided in this embodiment operates once every two days, performing approximately 180 detections per year. As shown in Table 1, the online oil chromatography monitoring device 100 detected an increase in hydrogen content from 3.64 μL / L to 5.96 μL / L in August. If the preset growth threshold is set to 2 μL / L, since the single hydrogen sensor 131 does not consume carrier gas or use a chromatographic column, The aforementioned increase in hydrogen content indicates that the detection cycle of the online oil chromatography monitoring device 100 has increased by 1-2 times. In addition, the longer the gas cylinder is stored, the more carrier gas will be consumed due to leakage. Therefore, considering the preset growth threshold of 2 μL / L, the online oil chromatography monitoring device 100 increases the number of multi-gas detections by 2 per month, and by 24 per year. Thus, the annual savings in carrier gas consumables can be calculated as: 100% (one bottle of carrier gas) - (1 bottle / 360) × (180 + 24) = 43.3% of the bottle of carrier gas. This can reduce the consumables and maintenance costs of the online oil chromatography monitoring device 100 by more than 40%.

[0076] Table 1. Operating data of dissolved gases in oil from the online oil chromatography monitoring device.

[0077]

[0078] Specifically, installing the single hydrogen sensor 131 in the online oil chromatography monitoring device 100 can extend the service life of the online oil chromatography monitoring device 100 by more than 50%.

[0079] In related technologies, online oil chromatography monitoring devices operate normally once a day, approximately 360 times a year. The lifespan of an online oil chromatography monitoring device mainly considers the lifespan of its chromatographic column, which is generally guaranteed by the manufacturer for about 2 years. Therefore, a single chromatographic column can be used approximately 720 times. The online oil chromatography monitoring device 100 provided in this embodiment operates once every two days, performing approximately (180+24) tests per year. Since the single hydrogen sensor 131 does not consume carrier gas or use the chromatographic column, the lifespan of the online oil chromatography monitoring device 100 can be calculated as: 720 times / (180+24) times = 3.53 years, representing an extension of 76.5%. Furthermore, as usage time increases, the chromatographic column will be affected by external factors. Therefore, considering actual usage conditions, the lifespan can be extended by more than 50%.

[0080] In one embodiment, after the first hydrogen detection data meets the triggering condition, before controlling the start of the online oil chromatography monitoring device 100 to perform multi-gas detection, the online oil chromatography monitoring device control method further includes: acquiring the current multi-gas detection data when the online oil chromatography monitoring device 100 is in a detection cycle.

[0081] In one embodiment, if the first hydrogen detection data does not meet the triggering condition, the single hydrogen sensor 131 terminates the detection and uploads the collected first hydrogen detection data to the background system 300.

[0082] In this embodiment, since the first hydrogen detection data does not meet the triggering conditions, it indicates that the hydrogen content in the oil in the transformer body oil tank 200 is low or the hydrogen content is not increasing, thus indicating that the transformer is basically without fault.

[0083] In the online oil chromatography monitoring device 100, the degassing module 171 mainly uses a chromatographic column to separate gases from the transformer body oil. As the number of times the chromatographic column is used increases, its resolution decreases, which in turn affects the accuracy of hydrogen detection. Therefore, in one embodiment, after controlling the online oil chromatography monitoring device 100 to perform multi-gas detection when the first hydrogen detection data meets the triggering condition, the control method of the online oil chromatography monitoring device further includes:

[0084] Step S30: Compare the first hydrogen detection data with the second hydrogen detection data to obtain the hydrogen deviation value.

[0085] The second hydrogen detection data was obtained by the oil chromatography online monitoring device 100 performing multi-gas detection.

[0086] Step S40: If the hydrogen deviation value is within the first preset hydrogen deviation range, adjust the second hydrogen detection data to obtain the final hydrogen detection data.

[0087] The first hydrogen preset deviation range refers to the range that exceeds the standard range but does not exceed the set range.

[0088] In one example, the standard range is ±30%, and the set range is ±40%. Correspondingly, the first preset deviation range for hydrogen is -40% to -30% and +30% to +40%.

[0089] In this embodiment, when the difference between the first hydrogen detection data collected by the single hydrogen sensor 131 and the second hydrogen detection data collected by the online oil chromatography monitoring device 100 is within the preset deviation range of the first hydrogen, it indicates that the resolution of the chromatographic column has decreased and its accuracy is poor. At this time, the second hydrogen detection data is adjusted to achieve fine-tuning of the hydrogen detection data. In addition, the control module 173 will also promptly send the final hydrogen detection data obtained from the adjustment to the background system 300 to facilitate subsequent fault analysis of the transformer.

[0090] In one embodiment, adjusting the second hydrogen detection data to obtain the final hydrogen detection data includes: adjusting the hydrogen deviation value to a second preset hydrogen deviation range to obtain the final hydrogen detection data; wherein, the maximum positive value of the second preset hydrogen deviation range is less than the maximum positive value of the first preset hydrogen deviation range, and the minimum negative value of the second preset hydrogen deviation range is greater than the minimum positive value of the first preset hydrogen deviation range.

[0091] The second hydrogen preset deviation range refers to the range that is only outside the standard range. In one example, the standard range is ±30%, therefore, in this example, the second hydrogen preset deviation range is ±30%.

[0092] Because the position of hydrogen in the chromatographic column is easily affected by impurity peaks, the second hydrogen detection data collected by the online oil chromatography monitoring device 100 is generally too high or too low. Therefore, in this embodiment, the hydrogen deviation value within the first preset deviation range is first adjusted to the second preset deviation range, and then the adjusted value is used as the final hydrogen detection data. The final hydrogen detection data is promptly uploaded to the background system 300 to facilitate subsequent transformer fault analysis. This allows the online oil chromatography monitoring device 100 to achieve self-adjustment during operation, significantly improving its functionality and greatly reducing false alarms and missed alarms, thus more effectively ensuring the stable operation of the transformer and the power grid. In one embodiment, the adjustment method can be linear regression for deviation adjustment.

[0093] In one embodiment, after obtaining the hydrogen deviation value, the control method for the online oil chromatography monitoring device further includes:

[0094] Step S50: If the hydrogen deviation value is within the second hydrogen preset deviation range, take the average value of the first hydrogen detection data and the second hydrogen detection data.

[0095] Among them, the maximum positive value of the second hydrogen preset deviation range is less than the maximum positive value of the first hydrogen preset deviation range, and the minimum negative value of the second hydrogen preset deviation range is greater than the minimum positive value of the first hydrogen preset deviation range.

[0096] Step S60: Use the average value as the final hydrogen detection data.

[0097] In this embodiment, when the difference between the first hydrogen detection data collected by the single hydrogen sensor 131 and the second hydrogen detection data collected by the online oil chromatography monitoring device 100 is within the preset deviation range of the second hydrogen, it indicates that although the resolution of the chromatographic column has decreased, the online oil chromatography monitoring device 100 is operating normally. At this time, there is no need to adjust the second hydrogen detection data. The average value is taken as the final hydrogen detection data, and the final hydrogen detection data is promptly sent to the background system to facilitate subsequent fault analysis of the transformer.

[0098] In one embodiment, after obtaining the hydrogen deviation value, the control method of the online oil chromatography monitoring device further includes: if the hydrogen deviation value exceeds the set range, sending an alarm message to the background system 300.

[0099] In this embodiment, when the hydrogen deviation value exceeds the set range, it indicates that the single hydrogen sensor and / or the online oil chromatography monitoring device cannot detect properly. Therefore, the control module 173 needs to send an alarm message to the background system 300 to perform maintenance on the single hydrogen sensor 131 and / or the online oil chromatography monitoring device 100. The alarm message includes first hydrogen detection data and multiple gas detection data, with the multiple gas detection data including second hydrogen detection data. In one example, the set range is ±40%.

[0100] As the number of times the chromatographic column in the online oil chromatography monitoring device 100 is used increases, its resolution decreases, which in turn affects the accuracy of multi-gas detection. Therefore, in one embodiment, after controlling the online oil chromatography monitoring device 100 to perform multi-gas detection, the control method for the online oil chromatography monitoring device further includes:

[0101] Obtain detection data of multiple gases collected by the online oil chromatography monitoring device 100;

[0102] If the hydrogen deviation value is within the preset deviation range of the first set of multiple gases, the detection data of multiple gases are adjusted according to the hydrogen deviation value to obtain the final detection data of multiple gases.

[0103] The first preset deviation range for multiple gases refers to the range exceeding the standard range but not exceeding the set range. In one example, the standard range is ±30%, and the set range is ±40%. Therefore, in this example, the first preset deviation range for multiple gases is -40% to -30% and +30% to +40%.

[0104] In this embodiment, since the multi-gas detection data includes the second hydrogen detection data, if there is a difference between the first hydrogen detection data collected by the single hydrogen sensor 131 and the second hydrogen detection data collected by the oil chromatography online monitoring device 100, it indicates that the multi-gas detection data collected by the oil chromatography online monitoring device 100 will also have the same difference.

[0105] In one example, the overall data collected by the online oil chromatography monitoring device 100 for multiple gases (including the second hydrogen detection data) were too large.

[0106] In another example, the overall data collected by the online oil chromatography monitoring device 100 for multiple gases (including the second hydrogen detection data) were too low.

[0107] As can be seen, this embodiment uses hydrogen deviation value to adjust the detection data of multiple gases. By referencing the self-adjustment function of hydrogen, the self-adjustment of the detection data of multiple gases is realized, which greatly improves the function of the oil chromatography online monitoring device 100 itself, thereby significantly reducing the situation of missed alarms and false alarms, and can more effectively ensure the stable operation of transformers and power grids.

[0108] In addition, the final multi-gas detection data will be promptly uploaded to the back-end system 300 to facilitate subsequent fault analysis of the transformer. In one embodiment, the adjustment can be performed using a linear regression method to adjust the deviation.

[0109] Since the online oil chromatography monitoring device 100 in this embodiment does not use offline detection data for offline adjustment, the self-adjustment function implemented by the online oil chromatography monitoring device 100 in this embodiment does not require additional manual intervention or other devices. The technical solution provided in this embodiment can realize the online self-adjustment function of the online oil chromatography monitoring device 100, that is, the online oil chromatography monitoring device 100 automatically adjusts during operation.

[0110] In one embodiment, after obtaining the multi-gas detection data collected by the online oil chromatography monitoring device 100, the online oil chromatography monitoring device control method further includes: when the hydrogen deviation value is within the second multi-gas preset deviation range, using the multi-gas detection data as the final multi-gas detection data; wherein, the maximum positive value of the second multi-gas preset deviation range is less than the maximum positive value of the first multi-gas preset deviation range, and the minimum negative value of the second multi-gas preset deviation range is greater than the minimum positive value of the first multi-gas preset deviation range.

[0111] The second preset deviation range for multiple gases refers to the range that exceeds the standard range only. In one example, the standard range is ±30%, and the set range is ±40%. Therefore, in this example, the second preset deviation range for multiple gases is ±30%.

[0112] In this embodiment, when the hydrogen deviation value is within the preset deviation range of the second multi-gas system, it indicates that although the resolution of the chromatographic column has decreased, the oil chromatography online monitoring device 100 is operating normally. At this time, there is no need to adjust the multi-gas detection data. The collected multi-gas detection data is directly used as the final multi-gas detection data, and the final multi-gas detection data is promptly sent to the background system 300 to facilitate subsequent fault analysis of the transformer.

[0113] To further aid in understanding this embodiment, a brief flowchart of the control method for the online oil chromatography monitoring device provided in this application is illustrated below with specific examples, in conjunction with the above embodiments. Please refer to... Figure 3 The control method for the online oil chromatography monitoring device specifically includes:

[0114] After setting the detection cycle of the palladium alloy membrane single hydrogen sensor 131 to once every 10 minutes, the palladium alloy membrane single hydrogen sensor 131 completes one independent oil inlet and outlet cycle to detect only hydrogen in the oil. After the oil inlet and outlet cycle is completed, the reading of the palladium alloy membrane single hydrogen sensor 131 stabilizes, and the first hydrogen detection data collected at the current moment is obtained. The control module 173 of the online oil chromatography monitoring device 100 judges the first hydrogen detection data. If the first hydrogen detection data does not meet the triggering conditions, the palladium alloy membrane single hydrogen sensor 131 ends the detection.

[0115] If the first hydrogen detection data meets the trigger condition, it is determined whether the online oil chromatography monitoring device 100 is in a detection cycle. If the online oil chromatography monitoring device 100 is not in a detection cycle, the detection cycle of the online oil chromatography monitoring device 100 is set to once every two days, and the control module 173 controls the online oil chromatography monitoring device 100 to perform multi-gas detection to obtain the current multi-gas detection data.

[0116] The process of performing multi-gas detection to obtain current multi-gas detection data includes: oil entering the oil chromatography online monitoring device 100; oil from the transformer body oil tank 200 being drawn into the degassing module 171 of the oil chromatography online monitoring device 100 for degassing to separate the multiple gases in the oil; after separation, the oil sample with the extracted gases pushed back into the transformer body oil tank 200 to complete the oil entry and exit of the oil chromatography online monitoring device 100; after the separated gases pass through the chromatographic column, multi-gas detection is performed by the detection module 172 of the oil chromatography online monitoring device 100 to obtain current multi-gas detection data; and when the oil chromatography online monitoring device 100 is in a detection cycle, it obtains the current multi-gas detection data.

[0117] The control module 173 compares the second hydrogen detection data from the acquired multi-gas detection data with the first hydrogen detection data to obtain a hydrogen deviation value. When the hydrogen deviation value is between -40% and -30% and between +30% and +40%, a linear regression method is used to adjust the deviation of the second hydrogen detection data to within ±30%, obtaining the final hydrogen detection data, which is then sent to the backend system 300. When the hydrogen deviation value is within ±30%, the average value of the first and second hydrogen detection data is taken as the final hydrogen detection data and sent to the backend system 300. When the hydrogen deviation value exceeds ±40%, the control module sends an alarm message to the backend system 300 to perform maintenance on the single hydrogen sensor and / or the online oil chromatography monitoring device.

[0118] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the online oil chromatography monitoring device of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0119] Furthermore, to achieve the above objectives, embodiments of this application also propose an online oil chromatography monitoring device, such as... Figure 2 As shown, the online oil chromatography monitoring device 100 is connected to the transformer through the oil inlet pipeline 110 and the oil return pipeline 120. The online oil chromatography monitoring device 100 includes a single hydrogen sensor 131 and a control module 173.

[0120] A single hydrogen sensor 131 is installed in the oil inlet line 110.

[0121] The control module 173 is connected to the single hydrogen sensor 131. The control module 173 includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the online oil chromatography monitoring device control method described above.

[0122] like Figure 4 As shown, the control module 173 may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the device. The processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. The communication device 1009 allows the control module 173 to communicate wirelessly or wiredly with other devices to exchange data. Although the control module 173 is shown in the figure with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented alternatively.

[0123] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0124] Understandably, a single hydrogen sensor can be placed on the upper part of the transformer body or in the transformer body's riser area to detect the hydrogen content of the transformer oil. However, because the single hydrogen sensor is a precision instrument, it is affected by the temperature and humidity of the transformer body, making direct placement on the transformer body impossible. Therefore, it is usually packaged with additional external devices and components, and then placed on the transformer body as a separate product. Furthermore, placing the single hydrogen sensor directly on the transformer body results in excessive distance between the sensor and the back-end system and AC power panel, requiring longer communication and power cables, which not only increases workload but also hinders data transmission.

[0125] In this embodiment, the single hydrogen sensor 131 is installed in the oil inlet pipe 110 inside the online oil chromatography monitoring device 100. This ensures that the single hydrogen sensor 131 can contact the oil flowing from the transformer body every time the online oil chromatography monitoring device 100 is supplied with oil, and also ensures that the oil in the transformer body oil tank 200 can flow through the single hydrogen sensor. This enables continuous and periodic detection of the hydrogen content of the transformer oil, greatly improving the performance of the online oil chromatography monitoring device 100 itself.

[0126] By directly installing the single hydrogen sensor 131 within the online oil chromatography monitoring device, two advantages are achieved. First, the single hydrogen sensor does not require a separate external casing, as the online oil chromatography monitoring device 100 provides protection for it, ensuring its normal operation and detection capabilities. Its protection rating can be IP65 or IP67. Second, integrating the single hydrogen sensor 131 and the online oil chromatography monitoring device 100 is not only aesthetically pleasing (the appearance of the online oil chromatography monitoring device 100 remains unchanged compared to before integration), but also makes the connection of the communication and power cables for the single hydrogen sensor 131 more convenient. Specifically, the communication cable of the single hydrogen sensor 131 can be directly connected to the control module 173 of the online oil chromatography monitoring device 100, and its power cable can be directly connected to the power module 174 of the online oil chromatography monitoring device 100, thereby enabling rapid startup and communication of the single hydrogen sensor 131. In one example, the online oil chromatography monitoring device 100 can be an oil chromatography cabinet.

[0127] In addition, the online oil chromatography monitoring device 100 is connected to the back-end system 300 via an RS485 cable.

[0128] In this embodiment, the control module 173 is connected to the single hydrogen sensor 131 via a communication line, so that the control module 173 can obtain the first hydrogen detection data and historical hydrogen detection data collected by the single hydrogen sensor 131, and perform comparative analysis to determine whether the triggering condition is met. If the first hydrogen detection data meets the triggering condition, the control module 173 controls the oil chromatography online monitoring device 100 to perform multi-gas detection.

[0129] Understandably, by adding a single hydrogen sensor 131 to the online oil chromatography monitoring device 100, the performance and function of the online oil chromatography monitoring device 100 itself are greatly improved. This not only enhances the real-time monitoring capability of the online oil chromatography monitoring device 100, reduces consumables and extends its lifespan, but also enables online self-adjustment.

[0130] In one embodiment, the online oil chromatography monitoring device 100 further includes:

[0131] Power module 174 is used to connect to the power supply line of single hydrogen sensor 131;

[0132] Detection module 172 collects detection data of various gases in the current target transformer;

[0133] The degassing module 171 is connected to the transformer body oil tank 200 through the oil inlet pipe 110 and the oil return pipe 120, and is used to separate multiple gases from the oil in the transformer body oil tank 200 for multi-gas detection.

[0134] In order to install the single hydrogen sensor 131 in the oil inlet line 110, in one embodiment, the oil chromatography online monitoring device 100 further includes:

[0135] Single hydrogen sensor mounting part 130, refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of the single hydrogen sensor mounting component of this application. The single hydrogen sensor mounting component 130 defines a sensor mounting cavity 132, and the single hydrogen sensor mounting component 130 has an oil inlet 133 and an oil outlet 134 that communicate with the sensor mounting cavity 132. Both the oil inlet 133 and the oil outlet 134 are connected to the oil inlet pipeline 110. At least a portion of the single hydrogen sensor 131 is disposed within the sensor mounting cavity 132.

[0136] In this embodiment, as Figure 2 As shown, a single hydrogen sensor mounting component 130 is installed in the oil inlet pipe 110 of the online oil chromatography monitoring device 100. By installing the single hydrogen sensor mounting component 130, it can be ensured that the single hydrogen sensor 131 can contact the oil flowing from the transformer body oil tank 200 every time oil is introduced into the online oil chromatography monitoring device 100, and that the oil in the transformer body can flow through the single hydrogen sensor 131, thereby achieving continuous and periodic detection of the hydrogen content of the transformer oil. Specifically, the oil in the transformer body oil tank 200 flows in from the oil inlet 133 of the single hydrogen sensor mounting component 130 and flows out from the oil outlet 134 of the single hydrogen sensor mounting component 130, so as to ensure that the probe of the single hydrogen sensor 131 located at the sensor mounting cavity 132 is immersed in the oil in the oil inlet pipe 110, thereby enabling continuous and periodic detection of the hydrogen content of the transformer oil.

[0137] Furthermore, the single hydrogen sensor mounting component 130 is a sealed mounting component and must be free from oil leakage to ensure the service life of the single hydrogen sensor 131. It should also be noted that the single hydrogen sensor mounting component 130 does not contain any components; these components refer to the comparison module, power supply module, and detection module, etc. The single hydrogen sensor mounting component 130 is used solely as a mounting component.

[0138] Furthermore, the single hydrogen sensor mounting component 130 is disposed on the oil inlet pipeline 110 between the second oil inlet valve 140 and the degassing module 171 of the online oil chromatography monitoring device 100. In one example, the single hydrogen sensor mounting component 130 is mounted on the interface flange 210 of the transformer body oil inlet.

[0139] Since the detection cycle of the online oil chromatography monitoring device 100 is different from that of the single hydrogen sensor 131, in one embodiment, the online oil chromatography monitoring device may further include an oil pump 160, which is disposed in the oil inlet pipeline 110 and used to drive transformer oil into the sensor mounting cavity 132. The single hydrogen sensor mounting component 130 may further include a first oil inlet valve 135 and / or a first oil return valve 136, wherein the first oil inlet valve 135 is disposed at the oil inlet 133 and the first oil return valve 136 is disposed at the oil outlet 134.

[0140] In this embodiment, by opening and closing the oil pump 160, the separately added first oil inlet valve 135, and the first oil return valve 136, the single hydrogen sensor 131 can independently circulate oil, thereby realizing the oil inlet and return operation according to the detection cycle of the single hydrogen sensor 131. It can also ensure that the single hydrogen sensor 131 in the single hydrogen sensor mounting part 130 detects oil with the same gas content as the transformer body oil tank 200 each time.

[0141] In one embodiment, the single hydrogen sensor 131 is a palladium alloy film single hydrogen sensor.

[0142] In this embodiment, the palladium alloy membrane single hydrogen sensor has the advantages of strong anti-interference ability, good detection reliability and long service life (up to 10 years), and can be used in complex background gas detection scenarios.

[0143] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the oil chromatography online monitoring device control method in the above embodiments.

[0144] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0145] The aforementioned computer-readable storage medium may be included in the control module; or it may exist independently and not be assembled into the control module.

[0146] The aforementioned computer-readable storage medium carries one or more programs. When the aforementioned one or more programs are executed by the control module, the control module: obtains the first hydrogen detection data collected by the single hydrogen sensor and historical hydrogen detection data, and performs comparative analysis to determine whether the triggering conditions are met. If the first hydrogen detection data meets the triggering conditions, the control module controls the online oil chromatography monitoring device to perform multi-gas detection.

[0147] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0148] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0149] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0150] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described control method for an online oil chromatography monitoring device. This solves the technical problem of high maintenance costs in the later stages due to frequent operation of the online oil chromatography monitoring device. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the control method for the online oil chromatography monitoring device provided in the above embodiments, and will not be elaborated upon here.

[0151] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the oil chromatography online monitoring device control method described above.

[0152] The computer program product provided in this application can solve the technical problem of high maintenance costs in the later stage caused by frequent operation of the online oil chromatography monitoring device. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the online oil chromatography monitoring device control method provided in the above embodiments, and will not be repeated here.

[0153] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A control method for an online oil chromatography monitoring device, characterized in that, The control method for the online oil chromatography monitoring device includes: The first hydrogen detection data collected by the single hydrogen sensor at the current sampling time is obtained; the oil chromatography online monitoring device is connected to the transformer through the oil inlet pipeline and the oil return pipeline, and the single hydrogen sensor is set in the oil inlet pipeline; If the first hydrogen detection data meets the triggering conditions, the online oil chromatography monitoring device is controlled to perform multi-gas detection.

2. The control method for the online oil chromatography monitoring device as described in claim 1, characterized in that, The triggering conditions include: The first hydrogen detection data exceeds a preset threshold; and / or The hydrogen detection data shows an increasing trend at the current sampling time, and the hydrogen detection data is obtained based on the first hydrogen detection data and historical hydrogen detection data.

3. The control method for the online oil chromatography monitoring device as described in claim 1, characterized in that, After the oil chromatography online monitoring device is controlled to perform multi-gas detection when the first hydrogen detection data meets the triggering condition, the control method for the oil chromatography online monitoring device further includes: The first hydrogen detection data is compared with the second hydrogen detection data to obtain the hydrogen deviation value; wherein, the second hydrogen detection data is obtained by the oil chromatography online monitoring device performing the multi-gas detection acquisition; If the hydrogen deviation value is within the first preset hydrogen deviation range, the second hydrogen detection data is adjusted to obtain the final hydrogen detection data.

4. The control method for the online oil chromatography monitoring device as described in claim 3, characterized in that, The adjustment of the second hydrogen detection data to obtain the final hydrogen detection data includes: The hydrogen deviation value is adjusted to a second preset hydrogen deviation range to obtain the final hydrogen detection data; wherein, the maximum positive value of the second preset hydrogen deviation range is less than the maximum positive value of the first preset hydrogen deviation range, and the minimum negative value of the second preset hydrogen deviation range is greater than the minimum positive value of the first preset hydrogen deviation range.

5. The control method for the online oil chromatography monitoring device as described in claim 3, characterized in that, After obtaining the hydrogen deviation value, the control method for the online oil chromatography monitoring device further includes: If the hydrogen deviation value is within the second hydrogen preset deviation range, the average value of the first hydrogen detection data and the second hydrogen detection data is taken; wherein, the maximum positive value of the second hydrogen preset deviation range is less than the maximum positive value of the first hydrogen preset deviation range, and the minimum negative value of the second hydrogen preset deviation range is greater than the minimum positive value of the first hydrogen preset deviation range. The average value is used as the final hydrogen detection data.

6. The control method for the online oil chromatography monitoring device as described in claim 3, characterized in that, After the online oil chromatography monitoring device is controlled to perform multi-gas detection, the control method for the online oil chromatography monitoring device further includes: Obtain detection data of multiple gases collected by an online oil chromatography monitoring device; When the hydrogen deviation value is within the preset deviation range of the first set of multiple gases, the detection data of the multiple gases are adjusted according to the hydrogen deviation value to obtain the final detection data of the multiple gases.

7. An online oil chromatography monitoring device, characterized in that, The online oil chromatography monitoring device is connected to the transformer via an oil inlet pipeline and an oil return pipeline. The online oil chromatography monitoring device includes: A single hydrogen sensor, wherein the single hydrogen sensor is disposed in the oil inlet line; and A control module connected to the single hydrogen sensor, the control module comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the online oil chromatography monitoring device as described in any one of claims 1-6.

8. The online oil chromatography monitoring device as described in claim 7, characterized in that, The online oil chromatography monitoring device also includes: A single hydrogen sensor mounting component, wherein a sensor mounting cavity is defined within the single hydrogen sensor mounting component, and the single hydrogen sensor mounting component has an oil inlet and an oil outlet communicating with the sensor mounting cavity, and both the oil inlet and the oil outlet are connected to the oil inlet pipeline; At least a portion of the single hydrogen sensor is disposed within the sensor mounting cavity.

9. The online oil chromatography monitoring device as described in claim 8, characterized in that, The online oil chromatography monitoring device further includes: an oil pump, which is installed in the oil inlet pipeline to drive transformer oil into the sensor mounting cavity; and The single hydrogen sensor mounting component also includes: A first oil inlet valve and / or a first oil return valve, wherein the first oil inlet valve is located at the oil inlet and the first oil return valve is located at the oil outlet.

10. The online oil chromatography monitoring device according to any one of claims 7-9, characterized in that, The single hydrogen sensor is a palladium alloy film single hydrogen sensor.

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