A method for generating an inspection strategy for a main transformer and related equipment

Abstract

The present application discloses a method for generating a patrol strategy for a main transformer and related equipment, including: obtaining characteristic data of the main transformer, where the characteristic data includes the material data, operation data, patrol data, and maintenance conclusion data of the main transformer; according to the characteristic data, obtaining a status label of the main transformer in the current patrol cycle, where the status label is used to characterize the health status of the main transformer, and there is at least one status label for the main transformer in one patrol cycle; according to the status label, generating a patrol strategy for the next patrol cycle, and the patrol strategy includes the duration, patrol content, and patrol level of the next patrol cycle. The formulation process of the patrol strategy fully considers the current health status of the main transformer, and plans the patrol plan for the next patrol cycle from the aspects of the patrol cycle, patrol content, and patrol level. Compared with the fixed patrol strategy, it can detect problems more timely and improve the patrol efficiency of the main transformer to a certain extent.

Description

Technical Field

[0001] This application relates to the technical field of power equipment inspection, and more specifically, to a method for generating a main transformer inspection strategy and related equipment. Background Art

[0002] In a power operation system, the main tasks of substation operation include the operation, operation and maintenance management of power equipment. It is the forefront of grid safety, and its operating conditions have a direct impact on people's lives. Once a substation accident occurs, it will cause economic losses at least, and at worst, it will endanger the safety of the power grid, equipment and personnel, and even bring unstable factors to society. Therefore, it is necessary to strictly pay attention to the load capacity of the equipment, strengthen the inspection and examination of the equipment, and eliminate potential hazards in the bud to ensure the long-term safe and stable operation of substation equipment and ensure the best benefits of the power station.

[0003] Currently, differential inspection in China refers to determining the working cycle, triggering conditions, working content and working requirements of daily inspection, professional inspection and dynamic inspection according to the equipment control level.

[0004] Taking the Guangdong Power Grid as an example, the main daily manual inspection strategies for 35kV - 500kV main transformers in unattended substations are as follows: Grade I: once a day, Grade II: once a week, Grade III: once every two weeks, Grade IV: once a month; the main machine inspection strategies for one machine and one substation are mainly: Grade I: at least once every 4 days, Grade II: at least once every 4 days, Grade III: at least once a week, Grade IV: at least once a week. It can be seen that the above inspection strategies are all divided according to the control level of the main transformer and are carried out completely according to a fixed inspection cycle, without differential inspection according to the specific characteristics of each main transformer. The control levels of I - IV only come from the equipment health data manually filled in by operating personnel and the equipment importance data issued annually, and their accuracy and timeliness are difficult to be fully guaranteed.

[0005] In addition, existing outdoor inspection robots generally adopt a wheeled structure, and their inspection speed is slow. Generally, it is difficult to complete the inspection of the whole substation within 4 days, resulting in a lack of focus in the inspection work and difficulty in discovering sudden problems of the main transformer in a timely manner. Although the existing camera inspection system can shoot the main transformer for a long time, if the shooting results are not stored differentially, it will cause a large storage load and network load to the whole system, and it is also difficult to sort out and analyze the large amount of useless data results generated. The existing manual inspection of the main transformer also follows the regular maintenance strategy, without differential inspection according to the specific characteristics of each main transformer, resulting in a lack of focus and low efficiency in the inspection, leading to a waste of a large amount of manpower, material resources and transportation costs. Summary of the Invention

[0006] In view of this, the present application provides a method, a system and a device for generating a patrol strategy for a main transformer, so as to generate a differentiated patrol strategy and improve the patrol efficiency of the main transformer.

[0007] To achieve the above object, a first aspect of the present application provides a method for generating a patrol strategy for a main transformer, including:

[0008] Obtain the characteristic data of the main transformer, where the characteristic data includes the material data, operation data, patrol data and maintenance conclusion data of the main transformer;

[0009] According to the characteristic data, obtain the status label of the main transformer in the current patrol cycle, where the status label is used to characterize the health status of the main transformer, and the main transformer has at least one status label in a patrol cycle;

[0010] Generate a patrol strategy for the next patrol cycle according to the status label, where the patrol strategy includes the duration, patrol content and patrol level of the next patrol cycle.

[0011] Preferably, the process of obtaining the characteristic data of the main transformer includes:

[0012] Obtain the material data of the main transformer through the asset system;

[0013] Obtain the operation data of the main transformer through the on-line monitoring system;

[0014] Obtain the patrol data of the main transformer through the patrol system;

[0015] Obtain the maintenance conclusion data through the expert diagnosis system.

[0016] Preferably, the process of obtaining the status label of the main transformer in the current patrol cycle according to the characteristic data includes:

[0017] According to the judgment basis of the status label, eliminate the status labels whose survival time reaches the preset time length from the status labels of the previous patrol cycle to obtain a first set of status labels;

[0018] Determine a second set of status labels hit by the main transformer in the current patrol cycle according to the characteristic data;

[0019] Merge the first set of status labels and the second set of status labels to obtain a third set of status labels, and use the status labels in the third set of status labels as the status labels of the current patrol cycle.

[0020] Preferably, the process of eliminating the status labels whose survival time reaches the preset time length from the status labels of the previous patrol cycle according to the judgment basis of the status label includes:

[0021] For each status label in the previous inspection cycle:

[0022] If the judgment basis of the status label is the overhaul conclusion data and the survival time of the status label reaches a preset first duration, the status label is removed from the status labels of the previous inspection cycle;

[0023] If the judgment basis of the status label is not the overhaul conclusion data and the survival time of the status label reaches a preset second duration, the status label is removed from the status labels of the previous inspection cycle.

[0024] Preferably, the status labels include "healthy", "suspected internal fault", "poor sealing and leakage", "poor heat dissipation", "heavy load and overheating", "hidden danger of important accessories", "poor foundation and grounding", "hidden danger of secondary equipment", "familial defect" and / or "environmental operation pollution";

[0025] The process of determining the second set of status labels hit by the main transformer in the current inspection cycle according to the characteristic data includes:

[0026] Judge whether the characteristic data matches the preset status label conditions, and the status label conditions correspond to the status labels one by one;

[0027] If so, according to the matched status label conditions, determine the second status labels hit by the main transformer in the current inspection cycle, and form a second set of status labels from all the second status labels.

[0028] Preferably, the process of merging the first set of status labels and the second set of status labels to obtain the third set of status labels includes:

[0029] Remove the status labels that belong to the second set of status labels from the first set of status labels to obtain the processed first set of status labels;

[0030] The status labels in the processed first set of status labels and the second set of status labels constitute the third set of status labels.

[0031] Preferably, the process of generating an inspection strategy for the next inspection cycle according to the status labels includes:

[0032] For each status label in the status labels, generate a candidate inspection strategy, and the candidate strategy includes at least one inspection item, and the inspection item includes inspection content and the corresponding inspection cycle and inspection level;

[0033] For each candidate inspection strategy, combine the inspection items with the same inspection content, and determine the inspection cycle with the shortest time in the inspection items as the inspection cycle of the inspection items, and determine the highest inspection level in the inspection items as the inspection level of the inspection items, to obtain an inspection item set;

[0034] Among them, the inspection strategy for the next inspection cycle is constituted by the inspection item set.

[0035] The second aspect of the present application provides a device for generating a main transformer inspection strategy, including:

[0036] A feature data acquisition unit, configured to acquire feature data of the main transformer, where the feature data includes material data, operation data, inspection data, and maintenance conclusion data of the main transformer;

[0037] A status label acquisition unit, configured to acquire a status label of the main transformer in the current inspection cycle according to the feature data, where the status label is used to characterize the health status of the main transformer, and the main transformer has at least one status label in an inspection cycle;

[0038] An inspection strategy generation unit, configured to generate an inspection strategy for the next inspection cycle according to the status label, where the inspection strategy includes the duration, inspection content, and inspection level of the next inspection cycle.

[0039] The third aspect of the present application provides a device for generating a main transformer inspection strategy, including: a memory and a processor;

[0040] The memory is used to store a program;

[0041] The processor is configured to execute the program to implement each step of the method for generating a main transformer inspection strategy as described above.

[0042] The fourth aspect of the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each step of the method for generating a main transformer inspection strategy as described above is implemented.

[0043] As can be seen from the above technical solutions, the present application first obtains the characteristic data of the main transformer, and the characteristic data includes the material data, operation data, inspection data and maintenance conclusion data of the main transformer. Then, according to the characteristic data, the status label of the main transformer in the current inspection cycle is obtained. Among them, the status label is used to characterize the health status of the main transformer, and the main transformer has at least one status label in one inspection cycle. Finally, according to the status label, the inspection strategy for the next inspection cycle is generated specifically. The inspection strategy includes the inspection cycle, inspection content and inspection level. The formulation process of the inspection strategy fully considers the current health status of the main transformer, and plans the inspection plan for the next inspection cycle from the inspection cycle, inspection content and inspection level. Compared with the fixed inspection strategy, it can find problems more timely and improve the inspection efficiency of the main transformer to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0045] Figure 1 Schematic diagram of the method for generating the inspection strategy of the main transformer disclosed in the embodiment of the present application;

[0046] Figure 2 Schematic diagram of the system for generating the inspection strategy of the main transformer disclosed in the embodiment of the present application;

[0047] Figure 3 Schematic diagram of the device for generating the inspection strategy of the main transformer disclosed in the embodiment of the present application;

[0048] Figure 4 Schematic diagram of the equipment for generating the inspection strategy of the main transformer disclosed in the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0050] The following introduces the method for generating the inspection strategy of the main transformer provided in the embodiment of the present application. Please refer to Figure 1, the method for generating the inspection strategy of the main transformer provided by the embodiments of the present application may include the following steps:

[0051] Step S100, obtain the characteristic data of the main transformer.

[0052] Among them, the characteristic data includes the material data, operation data, inspection data, and maintenance conclusion data of the main transformer.

[0053] Specifically, the material data of the main transformer may include data such as the equipment parameters of the main transformer, historical maintenance test data, historical defects, and family defects of similar equipment; the operation data of the main transformer may include electrical quantity data during real-time operation of the main transformer, on-line oil chromatogram monitoring data, alarm and accident signals, etc.; the inspection data of the main transformer may include the data obtained during the inspection of the main transformer, such as oil level, oil leakage situation, whether the transformer sound is uniform, and abnormal sounds such as loose screws; the maintenance conclusion data may be the work records or maintenance conclusions of the maintenance personnel during the maintenance work of the main transformer.

[0054] Step S200, obtain the status label of the main transformer in the current inspection cycle according to the characteristic data.

[0055] Specifically, according to the characteristic data obtained in step S100, obtain the status label of the main transformer in the current inspection cycle. Among them, the status label is used to characterize the health status of the main transformer. The main transformer may have only one status label or multiple status labels in one inspection cycle.

[0056] For example, if the main transformer has no bad conditions at all, its status label may only have the status label indicating its good status; if the main transformer has multiple bad conditions, it may hit multiple corresponding status labels, such as "poor sealing", "poor grounding", etc.

[0057] Step S300, generate the inspection strategy for the next inspection cycle according to the status label.

[0058] Specifically, according to the status label, generate the inspection strategy for the next inspection cycle. The inspection strategy includes the duration, inspection content, and inspection level of the next inspection cycle.

[0059] Among them, the duration of the next inspection cycle specifies the time for the next inspection, the inspection content specifies the content to be concerned about in the next inspection, and the inspection level corresponds to the specific inspection content and indicates the inspection level of the inspection content.

[0060] Exemplarily, for the inspection content with a higher inspection level, it is more necessary to ensure the detail and integrity of the inspection. That is, for this inspection content, a detailed and thorough inspection needs to be performed.

[0061] This application first obtains the characteristic data of the main transformer, and the characteristic data includes the material data, operation data, inspection data, and maintenance conclusion data of the main transformer. Then, according to the characteristic data, the status label of the main transformer in the current inspection cycle is obtained. Among them, the status label is used to characterize the health status of the main transformer, and the main transformer has at least one status label in one inspection cycle. Finally, according to the status label, an inspection strategy for the next inspection cycle is generated specifically. The inspection strategy includes the inspection cycle, inspection content, and inspection level. The formulation process of the inspection strategy fully considers the current health status of the main transformer, and plans the inspection plan for the next inspection cycle from the inspection cycle, inspection content, and inspection level. Compared with the fixed inspection strategy, it can find problems more timely and improve the inspection efficiency of the main transformer to a certain extent.

[0062] In some embodiments of this application, please refer to Figure 2 , the process of obtaining the characteristic data of the main transformer in step S100 may include:

[0063] S1. Obtain the material data of the main transformer through the asset system.

[0064] Specifically, the material data may include equipment parameters, test data, historical defect data, family defect data, etc. Among them, the equipment parameters may be equipment ledger parameters, such as parameter information such as number, brand, model, rated capacity, rated voltage, and rated current; the test data may be the records of relevant defects of the main transformer by the operation and maintenance personnel according to the operation results during the operation and maintenance stage of the main transformer, or the test results formed during the high-voltage test work on the main transformer during the power outage maintenance period of the main transformer; the historical defect data may be the historical defect data of the main transformer from the defect management system; the family defect data may be the family defect data of the same type of main transformer from the defect management system.

[0065] S2. Obtain the operation data of the main transformer through the on-line monitoring system.

[0066] For example, the real-time operation electrical quantity data, on-line oil chromatogram monitoring data, alarm and accident signals and other operation data of the main transformer can be called from the automation system or on-line monitoring system through the intelligent operation and maintenance platform.

[0067] S3. Obtain the inspection data of the main transformer through the inspection system.

[0068] Whether it is intelligent inspection or manual inspection, corresponding inspection data is generated and stored in the corresponding inspection system, and historical and current latest inspection data can be obtained through this inspection system.

[0069] S4. Obtain the maintenance conclusion data through the expert diagnosis system.

[0070] The maintenance conclusion data can be the work records or maintenance conclusions of professional operation and maintenance personnel during the maintenance work of the main transformer. This maintenance conclusion data can be stored in the corresponding expert diagnosis system to achieve data backup.

[0071] Through the above four aspects, comprehensive collection of the characteristic data of the main transformer can be achieved, and these data can comprehensively describe the operation status of the main transformer.

[0072] In some embodiments of the present application, the process of obtaining the status label of the main transformer in the current inspection cycle according to the characteristic data in step S200 may include:

[0073] S1. According to the judgment basis of the status label, eliminate the status labels whose survival time reaches the preset time length from the status labels in the previous inspection cycle to obtain the first set of status labels.

[0074] Specifically, according to its judgment basis, the status label can determine different retention durations. Therefore, among the status labels in the previous inspection cycle, some may be formed in the previous inspection cycle, and some may be formed in the previous several inspection cycles. For the status labels formed in the previous several inspection cycles, they may have become invalid in the current inspection cycle. Therefore, they need to be eliminated.

[0075] S2. According to the characteristic data, determine the second set of status labels that the main transformer hits in the current inspection cycle.

[0076] For example, the health status of the main transformer can be analyzed according to the characteristic data to determine the status labels that the main transformer hits in the current inspection cycle, and these status labels form the second set of status labels.

[0077] S3. Merge the first set of status labels and the second set of status labels to obtain the third set of status labels, and use the status labels in the third set of status labels as the status labels in the current inspection cycle.

[0078] Among them, as can be seen from the foregoing, the status labels in the first set of status labels are the status labels that already existed before the analysis of the characteristic data in step S3, and these labels are the status labels retained from the previous inspection cycles; the status labels in the second set of status labels are generated according to the characteristic data obtained in the current inspection cycle. After merging the status labels in the first set of status labels and the second set of status labels, the final status labels in the current inspection cycle are obtained. These status labels can more accurately reflect the health status of the main transformer in the current inspection cycle.

[0079] In some embodiments of the present application, the process of removing, from the status tags of the previous inspection cycle, the status tags whose duration has reached a preset time length according to the judgment basis of the status tags in S1 may include:

[0080] For each status tag in the previous inspection cycle:

[0081] S11, if the judgment basis of the status tag is maintenance conclusion data and the duration of the status tag reaches a preset first duration, then remove the status tag from the status tags of the previous inspection cycle.

[0082] For example, for a status tag whose judgment basis is maintenance conclusion data, if the duration of the status tag reaches 180 days, then remove the status tag from the status tags of the previous inspection cycle.

[0083] S12, if the judgment basis of the status tag is not maintenance conclusion data and the duration of the status tag reaches a preset second duration, then remove the status tag from the status tags of the previous inspection cycle.

[0084] For example, for a status tag whose judgment basis is not maintenance conclusion data, if the duration of the status tag reaches 4 inspection cycles, then remove the status tag from the status tags of the previous inspection cycle.

[0085] In some embodiments of the present application, the aforementioned status tags may include one or more of "healthy", "suspected internal fault", "poor sealing and leakage", "poor heat dissipation", "heavy load and overheating", "hidden danger of important accessories", "poor foundation and grounding", "hidden danger of secondary equipment", "familial defect", "environmental operation pollution".

[0086] In some embodiments of the present application, the process of determining, according to the characteristic data, the second status tag set hit by the main transformer in the current inspection cycle in S2 may include:

[0087] S21, determine whether the characteristic data matches a preset status tag condition, where the status tag condition corresponds to the status tag one by one.

[0088] S22, if so, determine the second status tag hit by the main transformer in the current inspection cycle according to the matched status tag condition, and form a second status tag set by all the second status tags.

[0089] Exemplarily, the characteristic data may include the following characteristic contents:

[0090] 1) Load current and ambient temperature of the main transformer.

[0091] 2) Whether the oil temperature and winding temperature are normal. The temperatures indicated by the on-site thermometer, the temperature indicating device in the control room, and the monitoring system are basically consistent, and the allowable error is generally not more than 5°C.

[0092] 3) Oil level and oil leakage conditions. In particular, it may include the oil leakage conditions of the following parts: each valve, meter, tap changer, and on-line oil filter device of the main body, flange joints and welds; connecting parts of valves, radiator pipes, oil pumps, gas relays, pressure relief valves, etc. of the cooler; bushing and secondary wiring box of the current transformer in the bushing riser seat, etc.; check that the oil level indication is within the normal range according to the standard curve of oil temperature and oil level.

[0093] 4) Whether the oil color in the breather becomes black, whether the silica gel changes color by more than 2 / 3, and the oil level in the oil cup should be within the oil level line range.

[0094] 5) Whether the sound of the transformer is uniform and whether there are abnormal sounds such as loose screws.

[0095] 6) The rain cover of the gas relay is intact; there should be no gas in the gas relay and the gas collection box, and the oil color should not be turbid or blackened.

[0096] 7) The iron core, clamping parts, shell, and neutral point are well grounded.

[0097] 8) There are no foreign objects on the transformer and its leads on each side, and the lead joints are not loose, overheated, or red-hot.

[0098] 9) The heat shrink wrapping of the low-voltage busbar and the joint box should have no defects or detachment.

[0099] 10) The transformer foundation has no subsidence.

[0100] 11) The switching-on and -off conditions of the coolers that are automatically switched on and off according to temperature and load, and there is no large amount of dirt accumulated on the radiator fins.

[0101] 12) The tap position and power indication of the on-load tap changer should be normal, the three-phase positions are the same, and they are consistent with the remote control.

[0102] 13) The bushing porcelain insulators are free of dirt, breakage, cracks, and discharge marks; the umbrella skirts of the composite insulation bushings have no cracking or aging; the shape of the rubber umbrella skirts can fit well with the surface of the porcelain umbrella skirts, the surface is clean and smooth, the silicone umbrella skirts have no cracks, the joints have no unsealing, the umbrella skirts have no detachment, and there is no creepage at the bonding position, etc.

[0103] 14) The pressure relief device is well sealed, there is no oil leakage, and the downcomer is not blocked.

[0104] 15) The spraying device or the oil-draining and nitrogen-filling fire extinguishing device is in good condition.

[0105] 16) Check whether the control box and the secondary terminal box are well sealed, whether there is water ingress or moisture, and whether the heater is operating normally; whether there are discharge marks inside the box, and whether the measures against small animals at the cable inlet and outlet are good; whether there is arcing at the terminal block and switch; whether the wiring is loose or fallen off; whether the inside of the box is clean; whether the fuses and switches are consistent with the operating mode; and whether the indicators are normal.

[0106] 17) The entire cooler should have no abnormal vibration; the submerged oil pump should operate normally without metallic collision sounds, the oil flow indicator should indicate normally without jitter; the fan should operate normally without abnormal noises, reverse rotation, jamming, or stopping; under the same operating conditions, the temperatures of each radiator felt by hand should be approximately the same; whether the cooler power status in the cooler control box is normal, whether the positions of each selection / control switch are normal, whether the enclosure moisture eliminator is correctly switched on and off, and whether the grounding of the enclosure is good.

[0107] 18) Whether there are abnormal alarm signals in the transformer protection and measurement and control devices, and whether the operating indicators are normal; whether the information such as temperature and tap position is sent normally; whether the pressure plates, handles, and transfer switches are correctly switched on and off; whether the terminal box and cabinet are well sealed and whether the moisture elimination device is normally switched on.

[0108] 19) When the on-line oil filtering device is filtering oil, there is no leakage. Check that the pressure gauge indicates below the standard pressure, and there are no abnormal noises and vibrations; the control components and terminals are not ablated or overheated, and the indicators are displayed normally; it operates normally without jamming.

[0109] 20) The off-circuit tap-changer should have no oil leakage; the tap-changer position indicator should be clear and indicate correctly, and the mechanical operating device should have no rust (for the voltage regulating mechanism at the lower part of the transformer); the gas collection device should not collect gas.

[0110] 21) There is no abnormality in the transformer neutral point DC isolation device and the signal is normal; the DC current of the transformer neutral point DC isolation device is normal and the neutral point grounding state is correct; the DC isolation device has no abnormal vibration, abnormal noise, or abnormal smell; the indicator signals on the control panel are normal and the air conditioning system operates normally; the background monitor of the DC isolation device operates well, the remote measurement and remote signaling are normal, and there is no alarm.

[0111] 22) Check whether the conductive parts such as the lead joints and equipotential connection plates are abnormally heated, and the relative temperature difference is not greater than 35%.

[0112] 23) Check whether the temperature distribution of the main body and the bushings is uniform, the temperature difference of the main body is not greater than 2 - 3K, and there is no abnormality in the oil level during infrared inspection.

[0113] 24) During night patrol, focus on checking whether there is flashover on the bushings, porcelain insulators, and insulators, and whether there are phenomena such as overheating, redness, and brightness at the bushing terminal connections.

[0114] 25) The measurement results of the on-line monitoring device for dissolved gases in the main transformer oil.

[0115] 26) Measurement results of the grounding current of the main transformer core and clamping parts.

[0116] 27) Test results of the oil sampling analysis of the main transformer.

[0117] 28) Inrush current generated during the closing operation of the main transformer and its decay rate.

[0118] Correspondingly, the state label conditions corresponding to the state labels can be configured as shown in Table 1. Among them, in addition to the above-mentioned state labels, the "other" label can also be defined according to other external conditions to adapt to different application scenarios.

[0119] Table 1: Judgment logic of state labels

[0120]

[0121]

[0122] In some embodiments of the present application, the process of S3 merging the first state label set and the second state label set to obtain the third state label set may include:

[0123] S31, excluding the state labels that belong to both the first state label set and the second state label set from the first state label set to obtain a processed first state label set.

[0124] S32, the state labels in the processed first state label set and the second state label set constitute the third state label set.

[0125] Since the state labels in the first state label set are the state labels that already existed before the analysis of the feature data in step S3, and these labels are the state labels retained from the previous inspection cycle; the state labels in the second state label set are generated according to the feature data obtained in the current inspection cycle. Therefore, if a certain state label belongs to both the first state label set and the second state label set, then the survival time of the state label in the first state label set must be greater than the survival time of the state label in the second state label set. At this time, the state label with the shorter survival time should be retained.

[0126] In some embodiments of the present application, the process of step S300 generating the inspection strategy for the next inspection cycle according to the state labels may include:

[0127] S1, for each of these state labels, generate a candidate inspection strategy, and the candidate strategy includes at least one inspection item, and the inspection item includes inspection content and the inspection cycle and inspection level corresponding to the inspection content.

[0128] S2. For each candidate inspection strategy, merge the inspection items with the same inspection content, and determine the inspection cycle with the shortest time in the inspection items as the inspection cycle of the inspection item, and determine the highest inspection level in the inspection items as the inspection level of the inspection item, to obtain an inspection item set.

[0129] Among them, the inspection strategy for the next inspection cycle constituted by the inspection item set can determine the corresponding inspection content according to the characteristic content of the aforementioned characteristic data.

[0130] For example, for "1) Load current of main transformer, ambient temperature" in the characteristic content, the corresponding inspection content can be formulated as: Obtain the load current and ambient temperature of the main transformer;

[0131] For "2) Whether the oil temperature and winding temperature are normal. The temperature indicated by the on-site thermometer, the temperature indicating device in the control room, and the temperature of the monitoring system are basically the same, and the allowable error is generally not more than 5°C." in the characteristic content, the corresponding inspection content can be formulated as: Judge whether the oil temperature and winding temperature are normal, and whether the temperature indicated by the on-site thermometer, the temperature indicating device in the control room, and the temperature of the monitoring system are the same.

[0132] The inspection cycle is the interval for the next inspection. For the main transformer with poor state, on the basis of the existing inspection cycle, the interval for the next inspection can be shortened, that is, the next inspection can be carried out in advance; for the main transformer with good state, on the basis of the existing inspection cycle, the interval for the next inspection can be increased, and the time for the next inspection can be postponed.

[0133] The inspection level characterizes the importance of the corresponding inspection content. According to this inspection level, key inspections can be carried out on some inspection content.

[0134] Exemplarily, corresponding to different state labels, its inspection strategy can be set as:

[0135] 1) "Healthy": The inspection cycle is a time interval extended by twice the existing overall inspection cycle of the main transformer. For example, if the existing inspection cycle is 4 days, the inspection cycle is set to 8 days, that is, the next inspection is set 8 days later; the inspection content remains unchanged, which is a full-range inspection; no additional key inspection components are set, that is, the inspection level remains unchanged.

[0136] 2) "Suspected internal fault": The inspection cycle is reduced by half based on the existing overall inspection cycle of the main transformer. For example, if the existing inspection cycle is 4 days, the inspection cycle is set to 2 days, that is, the next inspection is set 2 days later; the inspection content remains unchanged. The original inspection strategy task name can be set as "detailed inspection" for full - range inspection. In addition, an inspection strategy named "simple inspection for suspected internal fault" is added. Set "transformer sound, temperature distribution of the transformer body and bushings, dissolved gas value in the main transformer oil, online monitoring value of the grounding current of the main transformer core and clamping parts" as the inspection focus, and the inspection content is the inspection content corresponding to items 5, 23, 25, and 26 in the above characteristic content; the inspection level of the "detailed inspection" inspection strategy remains unchanged, and at the same time, the inspection level of the "simple inspection for suspected internal fault" inspection strategy is improved.

[0137] 3) "Poor sealing and leakage": The inspection cycle is the existing overall inspection cycle of the main transformer; in addition, an "oil level special inspection" inspection strategy is called by the intelligent inspection equipment once additionally during the interval between two inspections. For example, if the existing inspection cycle is 4 days, the inspection cycle of the "oil level special inspection" inspection strategy is once every 2 days; the inspection content of the "detailed inspection" inspection strategy remains unchanged for full - range inspection; in the "oil level special inspection" inspection strategy, set "oil level and oil temperature of the main transformer body, oil level of the tap - changer, oil level data of the bushings and their change values, record whether there is oil stain on the ground and the surface of the main transformer" as the inspection focus, and the inspection content is the inspection content corresponding to items 3, 6, 14, 16, and 20 in the above characteristic content, and at the same time, the inspection level of the "oil level special inspection" inspection strategy is improved.

[0138] 4) "Poor heat dissipation": The inspection cycle is the existing overall inspection cycle of the main transformer. In addition, an "oil temperature special inspection" inspection strategy is called by the intelligent inspection equipment once additionally during the interval between two inspections. For example, if the existing inspection cycle is 4 days, the inspection cycle of the "oil temperature special inspection" inspection strategy is once every 2 days; the inspection content of the "detailed inspection" inspection strategy remains unchanged for full - range inspection; in the "oil temperature special inspection" inspection strategy, set "oil temperature gauge of the main transformer body, winding temperature gauge, oil temperature displayed by the measurement and control device, background oil temperature, high - temperature alarm signal of the protection and measurement and control device and their change values" as the inspection focus, record the start - stop situation of the main transformer fan through the background monitoring system, and compare it with the temperature value of the main transformer. The inspection content is the inspection content corresponding to items 2, 11, and 17 in the above characteristic content, and at the same time, the inspection level of the "oil temperature special inspection" inspection strategy is improved.

[0139] 5) "Overloading and overheating": The inspection cycle is the existing overall inspection cycle of the main transformer. In addition, within the interval between two inspections, intelligent inspection equipment is called to conduct an additional "nighttime infrared temperature measurement operation". For example, if the existing inspection cycle is 4 days, the inspection cycle of the "nighttime infrared temperature measurement operation" inspection strategy is once every 2 days; the inspection content of the "detailed inspection" inspection strategy remains unchanged, which is a full-range inspection; in the "nighttime infrared temperature measurement operation" inspection strategy, set "whether there is abnormal heating in the conductive parts such as the lead joints of the main transformer, whether the temperature distribution of the main body and bushings is uniform, whether there is flashover in the bushings, porcelain insulators, and insulators, and whether there is overheating and redness, brightness, etc. in the bushing terminal connections" as the inspection focus, and the inspection content is the inspection content corresponding to items 1, 8, 22, 23, and 24 in the above characteristic content. At the same time, improve the inspection level of the "nighttime infrared temperature measurement operation" inspection strategy.

[0140] 6) "Hidden dangers in important accessories": The inspection cycle is the existing overall inspection cycle of the main transformer. In addition, within the interval between two inspections, intelligent inspection equipment is called to conduct an additional "inspection of important accessories of the main transformer". For example, if the existing inspection cycle is 4 days, the inspection cycle of the "inspection of important accessories of the main transformer" inspection strategy is once every 2 days; the inspection content of the "detailed inspection" inspection strategy remains unchanged, which is a full-range inspection; in the "inspection of important accessories of the main transformer" inspection strategy, set "the bushings, terminal boxes and control boxes, breather, gas relay, neutral point accessories of the pressure relief valve, thermometer, and on-line monitoring device of the main transformer" as the inspection focus, and the inspection content is the inspection content corresponding to items 4, 9, 12, 13, and 19 in the above characteristic content. At the same time, improve the inspection level of the "inspection of important accessories of the main transformer" inspection strategy.

[0141] 7) "Poor foundation and grounding": The inspection cycle is a time interval that doubles the existing overall inspection cycle of the main transformer. For example, if the existing inspection cycle is 4 days, the inspection cycle is set to once every 8 days; the inspection content of the "detailed inspection" inspection strategy remains unchanged, which is a full-range inspection; in the "special inspection of foundation and grounding" inspection strategy, set the foundation and grounding as the inspection content, and the inspection cycle is the existing overall inspection cycle of the main transformer. At the same time, improve the inspection level of the "special inspection of foundation and grounding" inspection strategy.

[0142] 8) "Hidden dangers in secondary equipment": The inspection cycle is a time interval that doubles the existing overall inspection cycle of the main transformer. For example, if the existing inspection cycle is 4 days, the inspection cycle is set to once every 8 days; the inspection content of the "detailed inspection" inspection strategy remains unchanged, which is a full-range inspection; in the "special inspection of secondary equipment" inspection strategy, set the secondary equipment as the inspection content, and the inspection cycle is the existing overall inspection cycle of the main transformer. At the same time, improve the inspection level of the "special inspection of secondary equipment" inspection strategy.

[0143] 9) "Old and worn-out": The inspection cycle is the existing overall inspection cycle of the main transformer, and the inspection content remains unchanged, which is a full-scope inspection.

[0144] 10) "Family defect": The inspection cycle is the existing overall inspection cycle of the main transformer. In addition, according to the content of the family defect, an additional "key defect inspection" is carried out by calling the intelligent inspection equipment during the interval between two inspections. For example, if the existing inspection cycle is 4 days, the inspection cycle of the "key defect inspection" inspection strategy is once every 2 days; the inspection content of the "detailed inspection" inspection strategy remains unchanged, which is a full-scope inspection; the inspection content of the "key defect inspection" inspection strategy is the corresponding family defect; at the same time, the inspection level of the "key defect inspection" inspection strategy is improved.

[0145] 11) "Polluted operating environment": The inspection cycle is the existing overall inspection cycle of the main transformer, and the inspection content remains unchanged, which is a full-scope inspection; in addition, an additional "night infrared temperature measurement" operation is carried out by calling the intelligent inspection equipment when the weather is humid, rainy or foggy, that is, on-demand inspection, and the inspection records whether there are phenomena such as flashovers in the bushings, porcelain insulators, and insulators.

[0146] The above embodiments perform differential inspection management based on the status labels of the main transformer, use data to perform inspections, checks, and analyses on the intelligent inspection system and operating personnel for the equipment, automatically complete the defect tracking and analysis work of the main transformer, formulate differential inspection strategies, and improve the inspection work efficiency. This method does not require manual input of any data during the formal operation process, and its characteristic of cyclic automatic feedback adjustment also does not require manual intervention, with the characteristics of real-time dynamic automatic correction. When necessary, it can also be corrected by the manual inspection results. Further, by formulating differential intelligent inspection strategies through status labels, scientifically planning the inspection cycle of the main transformer, highlighting the key points of the inspection content of the main transformer, it can be timely discovered before the faults of the main transformer further develop, improving the equipment reliability.

[0147] Next, the generating device for the main transformer inspection strategy provided by the embodiments of the present application will be described. The generating device for the main transformer inspection strategy described below can be correspondingly referred to the generating method for the main transformer inspection strategy described above.

[0148] Please refer to Figure 3 , the generating device for the main transformer inspection strategy provided by the embodiments of the present application may include:

[0149] A feature data acquisition unit 21, configured to acquire the feature data of the main transformer, where the feature data includes the material data, operation data, inspection data, and maintenance conclusion data of the main transformer;

[0150] A status label acquisition unit 22, configured to acquire a status label of the main transformer in the current inspection period according to the feature data, where the status label is used to characterize the health status of the main transformer, and there is at least one status label for the main transformer in one inspection period;

[0151] An inspection strategy generation unit 23, configured to generate an inspection strategy for the next inspection period according to the status label, where the inspection strategy includes the duration, inspection content, and inspection level of the next inspection period.

[0152] In some embodiments of the present application, the process of the above-mentioned feature data acquisition unit 21 acquiring the feature data of the main transformer may include:

[0153] Obtaining the material data of the main transformer through the asset system;

[0154] Obtaining the operation data of the main transformer through the on-line monitoring system;

[0155] Obtaining the inspection data of the main transformer through the inspection system;

[0156] Obtaining the maintenance conclusion data through the expert diagnosis system.

[0157] In some embodiments of the present application, the process of the above-mentioned status label acquisition unit 22 acquiring the status label of the main transformer in the current inspection period according to the feature data may include:

[0158] According to the judgment basis of the status label, eliminating the status labels whose survival time reaches the preset time length from the status labels of the previous inspection period to obtain a first status label set;

[0159] Determining a second status label set hit by the main transformer in the current inspection period according to the feature data;

[0160] Combining the first status label set and the second status label set to obtain a third status label set, and using the status labels in the third status label set as the status labels of the current inspection period.

[0161] In some embodiments of the present application, the process of the above-mentioned status label acquisition unit 22 eliminating the status labels whose survival time reaches the preset time length from the status labels of the previous inspection period according to the judgment basis of the status label may include:

[0162] For each status label of the previous inspection period:

[0163] If the judgment basis of the status label is the maintenance conclusion data and the survival time of the status label reaches the preset first duration, then eliminating the status label from the status labels of the previous inspection period;

[0164] If the judgment basis of the status label is not the overhaul conclusion data, and the survival time of the status label reaches a preset second duration, the status label is removed from the status labels of the previous inspection cycle.

[0165] In some embodiments of the present application, the process by which the above-mentioned status label acquisition unit 22 determines the second status label set hit by the main transformer in the current inspection cycle according to the characteristic data may include:

[0166] Judge whether the characteristic data matches a preset status label condition, and the status label condition corresponds to the status label one by one;

[0167] If so, according to the matched status label condition, determine the second status label hit by the main transformer in the current inspection cycle, and form a second status label set with all the second status labels.

[0168] In some embodiments of the present application, the process by which the above-mentioned status label acquisition unit 22 merges the first status label set and the second status label set to obtain a third status label set may include:

[0169] Remove the status labels that also belong to the second status label set from the first status label set to obtain a processed first status label set;

[0170] The status labels in the processed first status label set and the second status label set constitute the third status label set.

[0171] In some embodiments of the present application, the process by which the above-mentioned inspection strategy generation unit 23 generates an inspection strategy for the next inspection cycle according to the status label may include:

[0172] For each status label in the status label, generate a candidate inspection strategy, and the candidate strategy includes at least one inspection item, and the inspection item includes inspection content, inspection cycle, and inspection level corresponding to the inspection content;

[0173] For each candidate inspection strategy, merge the inspection items with the same inspection content, and determine the inspection cycle with the shortest time in the inspection item as the inspection cycle of the inspection item, and determine the highest inspection level in the inspection item as the inspection level of the inspection item to obtain an inspection item set;

[0174] Among them, the inspection strategy for the next inspection cycle is constituted by the inspection item set.

[0175] The main transformer inspection strategy generation device provided by the embodiments of the present application can be applied to main transformer inspection strategy generation devices, such as computers, etc. Optionally, Figure 4The hardware structure block diagram of the device for generating the inspection strategy of the main transformer is shown. Referring to Figure 4 , the hardware structure of the device for generating the inspection strategy of the main transformer may include: at least one processor 31, at least one communication interface 32, at least one memory 33, and at least one communication bus 34.

[0176] In the embodiments of the present application, the number of the processor 31, the communication interface 32, the memory 33, and the communication bus 34 is at least one, and the processor 31, the communication interface 32, and the memory 33 complete communication with each other through the communication bus 34;

[0177] The processor 31 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application, etc.;

[0178] The memory 32 may include a high-speed RAM memory, and may also include a non-volatile memory, etc., such as at least one disk memory;

[0179] Among them, the memory 33 stores a program, and the processor 31 can call the program stored in the memory 33. The program is used for:

[0180] Obtaining the characteristic data of the main transformer, where the characteristic data includes the material data, operation data, inspection data, and maintenance conclusion data of the main transformer;

[0181] According to the characteristic data, obtaining the status label of the main transformer in the current inspection cycle, where the status label is used to characterize the health status of the main transformer, and the main transformer has at least one status label in an inspection cycle;

[0182] Generating an inspection strategy for the next inspection cycle according to the status label, where the inspection strategy includes the duration, inspection content, and inspection level of the next inspection cycle.

[0183] Optionally, the refined functions and extended functions of the program may refer to the above description.

[0184] The embodiments of the present application also provide a storage medium, which can store a program suitable for being executed by a processor. The program is used for:

[0185] Obtaining the characteristic data of the main transformer, where the characteristic data includes the material data, operation data, inspection data, and maintenance conclusion data of the main transformer;

[0186] According to the characteristic data, a status label of the main transformer in the current patrol cycle is obtained, wherein the status label is used to characterize the health status of the main transformer, and the main transformer has at least one status label in one patrol cycle;

[0187] A patrol strategy for the next patrol cycle is generated according to the status tag, wherein the patrol strategy includes the duration, patrol content and patrol level of the next patrol cycle.

[0188] Optionally, the detailed functions and extended functions of the program may refer to the above description.

[0189] In summary:

[0190] The present application first obtains the characteristic data of the main transformer, and the characteristic data includes the information data, operation data, inspection data and maintenance conclusion data of the main transformer. Then, based on the characteristic data, the status label of the main transformer in the current inspection cycle is obtained. Among them, the status label is used to characterize the health status of the main transformer, and the main transformer has at least one status label in a inspection cycle. Finally, based on the status label, the inspection strategy for the next inspection cycle is generated in a targeted manner, and the inspection strategy includes the inspection cycle, inspection content and inspection level. The formulation process of the inspection strategy fully considers the current health status of the main transformer, and plans the inspection plan for the next inspection cycle based on the inspection cycle, inspection content and inspection level. Compared with the fixed inspection strategy, it can discover problems more promptly and improve the inspection efficiency of the main transformer to a certain extent.

[0191] Furthermore, all conditions required for the health status analysis of the main transformer in this application are automatically retrieved from the data platform, and no data needs to be manually entered during operation. Its cyclic automatic feedback adjustment feature does not require manual intervention, and has the characteristics of real-time dynamic automatic correction, reflecting closed-loop management. This application makes full use of the existing main transformer operation and maintenance results provided by the data platform, comprehensively labels the main transformer, forms status labels, replaces personnel decision-making, and uses data to patrol, inspect, and analyze equipment for operating personnel, automatically completes main transformer defect tracking and analysis, and rationally applies various data of the main transformer. Classification thinking solves the problem that various data of the main transformer are too scattered and not used in a unified manner.

[0192] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0193] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0194] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for generating an inspection strategy for a main transformer, characterized in that, Including: Obtain the characteristic data of the main transformer, where the characteristic data includes the material data, operation data, inspection data, and maintenance conclusion data of the main transformer; According to the characteristic data, obtain the status label of the main transformer in the current inspection cycle. Among them, the status label is used to characterize the health status of the main transformer, and there is at least one status label for the main transformer in an inspection cycle; According to the status label, generate the inspection strategy for the next inspection cycle, where the inspection strategy includes the duration, inspection content, and inspection level of the next inspection cycle; The process of generating the inspection strategy for the next inspection cycle according to the status label includes: For each status label in the status label, generate a candidate inspection strategy, where the candidate inspection strategy includes at least one inspection item, and the inspection item includes the inspection content and the corresponding inspection cycle and inspection level of the inspection content; For each candidate inspection strategy, merge the inspection items with the same inspection content, and determine the inspection cycle with the shortest time in the inspection item as the inspection cycle of the inspection item, and determine the highest inspection level in the inspection item as the inspection level of the inspection item, to obtain the inspection item set; Among them, the inspection strategy for the next inspection cycle is composed of the inspection item set; The process of obtaining the status label of the main transformer in the current inspection cycle according to the characteristic data includes: According to the judgment basis of the status label, eliminate the status labels whose survival time reaches the preset time length from the status labels of the previous inspection cycle, to obtain the first status label set; According to the characteristic data, determine the second status label set that the main transformer hits in the current inspection cycle; Merge the first status label set and the second status label set to obtain the third status label set, and use the status labels in the third status label set as the status labels of the current inspection cycle; The process of eliminating the status labels whose survival time reaches the preset time length from the status labels of the previous inspection cycle according to the judgment basis of the status label includes: For each status label in the previous inspection cycle: If the judgment basis of the status label is the maintenance conclusion data and the survival time of the status label reaches the preset first duration, then eliminate the status label from the status labels of the previous inspection cycle; If the judgment basis of the status label is not the maintenance conclusion data and the survival time of the status label reaches the preset second duration, then eliminate the status label from the status labels of the previous inspection cycle.

2. The method according to claim 1, wherein The process of obtaining the characteristic data of the main transformer includes: Obtain the material data of the main transformer through the asset system; Obtain the operation data of the main transformer through the on-line monitoring system; Obtain the inspection data of the main transformer through the inspection system; Obtain the maintenance conclusion data through the expert diagnosis system.

3. The method according to claim 1, wherein The status label includes "healthy", "suspected internal fault", "poor sealing and leakage", "poor heat dissipation", "heavy load and heating", "hidden danger of important accessories", "poor foundation and grounding", "hidden danger of secondary equipment", "familial defect" and / or "environmental operation pollution"; The process of determining the second set of status labels hit by the main transformer in the current inspection cycle based on the feature data includes: Determine whether the feature data matches the preset status label conditions, where the status label conditions correspond to the status labels one by one; If so, determine the second status label hit by the main transformer in the current inspection cycle according to the matched status label conditions, and form a second set of status labels with all the second status labels.

4. The method according to claim 1, wherein The process of merging the first set of status labels and the second set of status labels to obtain the third set of status labels includes: Exclude the status labels that also belong to the second set of status labels from the first set of status labels to obtain a processed first set of status labels; The status labels in the processed first set of status labels and the second set of status labels constitute the third set of status labels.

5. A generating device for a main transformer inspection strategy, characterized in that Including: A feature data acquisition unit for acquiring the feature data of the main transformer, where the feature data includes the material data, operation data, inspection data, and maintenance conclusion data of the main transformer; A status label acquisition unit for acquiring the status labels of the main transformer in the current inspection cycle according to the feature data, where the status labels are used to characterize the health status of the main transformer, and there is at least one status label for the main transformer in one inspection cycle; An inspection strategy generation unit for generating an inspection strategy for the next inspection cycle according to the status labels, where the inspection strategy includes the duration, inspection content, and inspection level of the next inspection cycle; The process by which the inspection strategy generation unit generates an inspection strategy for the next inspection cycle according to the status labels may include: For each status label in the status labels, generate a candidate inspection strategy, where the candidate inspection strategy includes at least one inspection item, and the inspection item includes the inspection content and the corresponding inspection cycle and inspection level for the inspection content; For each candidate inspection strategy, merge the inspection items with the same inspection content, and determine the shortest inspection cycle in the inspection items as the inspection cycle of the inspection item, and determine the highest inspection level in the inspection items as the inspection level of the inspection item to obtain a set of inspection items; Among them, the inspection strategy for the next inspection cycle is constituted by the set of inspection items; The status label acquisition unit is specifically used to exclude the status labels whose survival time reaches the preset time length from the status labels of the previous inspection cycle according to the judgment basis of the status labels to obtain the first set of status labels; Determine the second set of status labels hit by the main transformer in the current inspection cycle according to the feature data; Merge the first set of status labels and the second set of status labels to obtain the third set of status labels, and use the status labels in the third set of status labels as the status labels of the current inspection cycle; The process of excluding the status labels whose survival time reaches the preset time length from the status labels of the previous inspection cycle according to the judgment basis of the status labels includes: For each status label in the previous inspection cycle: If the judgment basis of the status label is the maintenance conclusion data, and the survival time of the status label reaches a preset first duration, then the status label is removed from the status labels of the previous inspection cycle; If the judgment basis of the status label is not the maintenance conclusion data, and the survival time of the status label reaches a preset second duration, then the status label is removed from the status labels of the previous inspection cycle.

6. A device for generating an inspection strategy for a main transformer, characterized in that, Including: A memory and a processor; The memory is used for storing programs; The processor is used for executing the programs to implement each step of the method for generating the inspection strategy of the main transformer as described in any one of claims 1 to 4.

7. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, each step of the method for generating the inspection strategy of the main transformer as described in any one of claims 1 to 4 is implemented.

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