Transformer cooler group overall state monitoring method and system

Abstract

The invention provides a method for monitoring the overall state of a transformer cooler group. The method comprises the following steps: periodically acquiring operation data and operation images of a transformer carrying the cooler group; wherein the operation data comprises low-voltage side voltage, current, oil temperature, oil level and operation noise; and analyzing the operation data and the operation image of the transformer obtained in each period so as to determine the health condition of the cooler group. According to the invention, overall monitoring can be carried out based on the operation condition of the transformer to realize health monitoring of the cooler group, so that the monitoring result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer detection, and in particular to a method and system for monitoring the overall state of a transformer cooler group. Background Art

[0002] At present, transformers play a vital role in ensuring efficient power transmission and distribution. In practice, the main factors of transformer failure include transformer oil leakage, overload, sudden temperature increase, lack of maintenance, etc. Most of these factors are closely related to the transformer's cooling system, so an effective cooling mechanism is needed to maintain the transformer's optimal operating temperature and prevent the transformer from overheating.

[0003] In the transformer structure, the cooler group can reduce the high temperature of the transformer caused by factors such as winding loss, which is crucial to extending the life of the transformer. At the same time, the cooler group is also troubled by many fault factors and often fails. In order to solve this problem and ensure the reliability of the transformer, it is necessary to properly monitor the health of the transformer cooler group.

[0004] However, the existing health status monitoring method of the transformer cooler group is limited to monitoring from the perspective of the cooler group, but lacks overall monitoring from the perspective of the transformer, so that the monitoring results need to be improved. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a method and system for monitoring the overall status of a transformer cooler group, which can realize health monitoring of the cooler group based on the overall monitoring of the operating status of the transformer, thereby improving the monitoring result.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a method for monitoring the overall state of a transformer cooler group, the method comprising the following steps:

[0007] Periodically acquiring operating data and operating images of a transformer carrying a cooler group; wherein the operating data includes low-voltage side voltage, current, oil temperature, oil level and operating noise;

[0008] The transformer operation data and operation images acquired in each cycle are analyzed to determine the health status of the cooler group.

[0009] The step of analyzing the operation data and operation image of the transformer obtained in each cycle to determine the health status of the cooler group specifically includes:

[0010] The low-voltage side voltage of the transformer obtained in each cycle is compared with the preset voltage threshold to obtain the voltage score of each cycle;

[0011] The transformer current obtained in each cycle is compared with the preset current threshold to obtain the current score of each cycle;

[0012] The transformer oil temperature obtained in each cycle is compared with the preset oil temperature threshold to obtain the oil temperature score of each cycle;

[0013] The oil level of the transformer obtained in each cycle is compared with the preset oil level threshold to obtain the oil level score of each cycle;

[0014] The transformer noise acquired in each cycle is compared with the preset noise threshold to obtain the noise score of each cycle;

[0015] Perform continuous frame analysis on the transformer operation images acquired in each cycle to obtain the number of frames in each cycle, and compare the number of frames in each cycle with the preset frame number threshold to obtain the image frame score of each cycle;

[0016] According to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score of each cycle, and combined with the weighting factors assigned to the low-voltage side voltage, current, oil temperature, oil level, operating noise and image, the total score of each cycle is calculated, and the health status of the cooler group is determined based on the total score of each cycle.

[0017] Among them, through the formula Calculate the total score HS of each cycle; where,

[0018] P1~P6 are the voltage scores, current scores, oil temperature scores, oil level scores, noise scores and image frame scores in the same cycle respectively; θ1~θ6 are the preset weighting factors corresponding to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score respectively, and are all fixed constants.

[0019] The step of determining the health status of the cooler group according to the total score of each cycle specifically includes:

[0020] If it is determined that the total score of the current cycle is greater than or equal to the first preset value, it is determined that the health status of the cooler group corresponding to the current cycle is normal;

[0021] If it is determined that the total score of the current cycle is less than the first preset value and greater than or equal to the second preset value, then the health status of the cooler group corresponding to the current cycle is determined to be sub-healthy;

[0022] If it is determined that the total score of the current cycle is less than the second preset value, it is determined that the health status of the cooler group corresponding to the current cycle is abnormal.

[0023] Among them, the low-voltage side voltage and current are obtained through the electric energy meter on the low-voltage side of the transformer; the oil temperature is collected by a temperature sensor placed in the transformer oil; the oil level is collected by an oil level sensor placed in the transformer oil; the operating noise is collected by a noise sensor placed at a specified position of the transformer; and the operating image is collected by a camera located on the top of the transformer.

[0024] The embodiment of the present invention further provides a transformer cooler group overall state monitoring system, comprising:

[0025] An online data acquisition unit, used to periodically acquire operating data and operating images of the transformer carrying the cooler group; wherein the operating data includes low-voltage side voltage, current, oil temperature, oil level and operating noise;

[0026] The health status detection unit is used to analyze the operation data and operation image of the transformer obtained in each cycle to determine the health status of the cooler group.

[0027] Wherein, the health status detection unit comprises:

[0028] A first score calculation module is used to compare the low-voltage side voltage of the transformer obtained in each cycle with a preset voltage threshold to obtain a voltage score for each cycle;

[0029] A second score calculation module is used to compare the transformer current obtained in each cycle with a preset current threshold to obtain a current score for each cycle;

[0030] The third score calculation module is used to compare the oil temperature of the transformer obtained in each cycle with the preset oil temperature threshold to obtain the oil temperature score of each cycle;

[0031] A fourth score calculation module is used to compare the oil level of the transformer obtained in each cycle with a preset oil level threshold to obtain an oil level score for each cycle;

[0032] A fifth score calculation module, used for comparing the noise of the transformer acquired in each cycle with a preset noise threshold to obtain a noise score of each cycle;

[0033] The sixth score calculation module is used to perform continuous frame analysis on the operation image of the transformer obtained in each cycle to obtain the number of frames in each cycle, and compare the number of frames in each cycle with a preset frame number threshold to obtain the image frame score of each cycle;

[0034] The total score calculation and status detection module is used to calculate the total score of each cycle based on the voltage score, current score, oil temperature score, oil level score, noise score and image frame score of each cycle, and combine the weighting factors assigned to the low-voltage side voltage, current, oil temperature, oil level, operating noise and image respectively, and determine the health status of the cooler group based on the total score of each cycle.

[0035] Among them, through the formula Calculate the total score HS of each cycle; where,

[0036] P1~P6 are the voltage scores, current scores, oil temperature scores, oil level scores, noise scores and image frame scores in the same cycle respectively; θ1~θ6 are the preset weighting factors corresponding to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score respectively, and are all fixed constants.

[0037] Among them, the low-voltage side voltage and current are obtained through the electric energy meter on the low-voltage side of the transformer; the oil temperature is collected by a temperature sensor placed in the transformer oil; the oil level is collected by an oil level sensor placed in the transformer oil; the operating noise is collected by a noise sensor placed at a specified position of the transformer; and the operating image is collected by a camera located on the top of the transformer.

[0038] Implementing the embodiments of the present invention has the following beneficial effects:

[0039] The present invention performs online monitoring and analysis of the voltage, current, oil temperature, oil level, operating noise and operating image of the low-voltage side of the transformer to achieve health monitoring of the overall state of the transformer cooler group. Therefore, the health monitoring of the cooler group can be achieved based on the overall monitoring of the operating status of the transformer, thereby improving the monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0041] Figure 1 A flow chart of a method for monitoring the overall status of a transformer cooler group provided by an embodiment of the present invention;

[0042] Figure 2 A network architecture deployment diagram for online monitoring of a transformer in a method for monitoring the overall state of a transformer cooler group provided by an embodiment of the present invention;

[0043] Figure 3 A schematic structural diagram of a transformer cooler group overall status monitoring system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] like Figure 1 As shown in the figure, a transformer cooler group overall state monitoring method is provided in an embodiment of the present invention, and the method comprises the following steps:

[0046] Step S1, periodically acquiring operation data and operation images of a transformer carrying a cooler group; wherein the operation data includes low-voltage side voltage, current, oil temperature, oil level and operation noise;

[0047] Step S2: Analyze the transformer operation data and operation images acquired in each cycle to determine the health status of the cooler group.

[0048] The specific process is that in step S1, the operation data and operation image of the transformer carrying the cooler group are monitored online periodically (for example, once every 20 minutes).

[0049] At this time, if Figure 2 As shown, the voltage and current on the low-voltage side are obtained through the electric energy meter on the low-voltage side of the transformer; the oil temperature is collected by a temperature sensor placed in the transformer oil; the oil level is collected by an oil level sensor placed in the transformer oil; the operating noise is collected by a noise sensor (such as a miniature microphone) placed at a specified position of the transformer; and the operating image is collected by a camera (or camera) located on the top of the transformer.

[0050] In step S2, first, the low-voltage side voltage of the transformer obtained in each cycle is compared with the preset voltage threshold to obtain the voltage score of each cycle; the current of the transformer obtained in each cycle is compared with the preset current threshold to obtain the current score of each cycle; the oil temperature of the transformer obtained in each cycle is compared with the preset oil temperature threshold to obtain the oil temperature score of each cycle; the oil level of the transformer obtained in each cycle is compared with the preset oil level threshold to obtain the oil level score of each cycle; the noise of the transformer obtained in each cycle is compared with the preset noise threshold to obtain the noise score of each cycle; and, the operation image of the transformer obtained in each cycle is continuously analyzed to obtain the number of frames of each cycle, and the number of frames of each cycle is compared with the preset frame number threshold to obtain the image frame score of each cycle.

[0051] It should be noted that the voltage threshold, current threshold, oil temperature threshold, oil level threshold, noise threshold and image frame number threshold can be flexibly designed according to actual conditions and will not be elaborated here.

[0052] Finally, according to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score of each cycle, and combined with the weighting factors assigned to the low-voltage side voltage, current, oil temperature, oil level, operating noise and image, the total score of each cycle is calculated, and the health status of the cooler group is determined according to the total score of each cycle, as follows:

[0053] (1) Through the formula Calculate the total score HS of each cycle; where P1~P6 are the voltage score, current score, oil temperature score, oil level score, noise score and image frame score in the same cycle respectively; θ1~θ6 are the preset weighting factors corresponding to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score respectively, all of which are fixed constants;

[0054] (2) If it is determined that the total score of the current cycle is greater than or equal to the first preset value, the health status of the cooler group corresponding to the current cycle is determined to be normal; if it is determined that the total score of the current cycle is less than the first preset value and greater than or equal to the second preset value, the health status of the cooler group corresponding to the current cycle is determined to be sub-healthy; if it is determined that the total score of the current cycle is less than the second preset value, the health status of the cooler group corresponding to the current cycle is determined to be abnormal.

[0055] It is understandable that all weighting factors, first preset values ​​and second preset values ​​can be flexibly designed according to actual conditions, and will not be elaborated herein.

[0056] In an example, if the low-voltage side voltage obtained in the current cycle is 218V, the current is 50A, the oil temperature is 50 degrees, the oil level is 10cm, the noise value is 40 decibels, and the number of image frames is 20 frames, then the corresponding voltage threshold is 220V, the current threshold is 100A, the oil temperature threshold is 100 degrees, the oil level threshold is 50cm, the noise threshold is 100 decibels, and the image frame threshold is 50 frames. At this time, the calculated voltage score is 218 / 220=0.9, the current score is 50 / 100=0.5, the oil temperature score is 50 / 100=0.5, the oil level score is 10 / 50=0.2, the noise score is 40 / 100=0.4, and the image frame score is 20 / 50=0.4.

[0057] In addition, the corresponding weighting factors are as follows according to the importance: oil temperature is 10, oil level is 8, low voltage side voltage is 6, current is 4, noise is 2, and image is 2.

[0058] Through the formula The total score HS of the current cycle is calculated to be 0.4875. Given that the first preset value is 0.8 and the second preset value is 0.3, then the second preset value 0.3 < HS = 0.4875 < the first preset value 0.8, and the health condition of the cooler group in the current cycle is sub-healthy.

[0059] As Figure 3 shown, in an embodiment of the present invention, a transformer cooler group overall state monitoring system is provided, including;

[0060] An online data acquisition unit 110, configured to periodically acquire the operation data and operation images of the transformer carrying the cooler group; wherein, the operation data includes the low-voltage side voltage, current, oil temperature, oil level, and operation noise;

[0061] A health condition detection unit 120, configured to analyze the operation data and operation images of the transformer acquired in each cycle to determine the health condition of the cooler group.

[0062] Wherein, the health condition detection unit 120 includes:

[0063] A first score calculation module, configured to compare the low-voltage side voltage of the transformer acquired in each cycle with a preset voltage threshold to obtain the voltage scores of each cycle;

[0064] A second score calculation module, configured to compare the current of the transformer acquired in each cycle with a preset current threshold to obtain the current scores of each cycle;

[0065] A third score calculation module, configured to compare the oil temperature of the transformer acquired in each cycle with a preset oil temperature threshold to obtain the oil temperature scores of each cycle;

[0066] A fourth score calculation module, configured to compare the oil level of the transformer acquired in each cycle with a preset oil level threshold to obtain the oil level scores of each cycle;

[0067] A fifth score calculation module, configured to compare the noise of the transformer acquired in each cycle with a preset noise threshold to obtain the noise scores of each cycle;

[0068] A sixth score calculation module, configured to perform continuous frame analysis on the operation images of the transformer acquired in each cycle to obtain the number of frames of each cycle, and compare the number of frames of each cycle with a preset frame number threshold to obtain the image frame scores of each cycle;

[0069] The total score calculation and status detection module is used to calculate the total score of each cycle based on the voltage score, current score, oil temperature score, oil level score, noise score and image frame score of each cycle, and combine the weighting factors assigned to the low-voltage side voltage, current, oil temperature, oil level, operating noise and image respectively, and determine the health status of the cooler group based on the total score of each cycle.

[0070] Among them, through the formula Calculate the total score HS of each cycle; where,

[0071] P1~P6 are the voltage scores, current scores, oil temperature scores, oil level scores, noise scores and image frame scores in the same cycle respectively; θ1~θ6 are the preset weighting factors corresponding to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score respectively, and are all fixed constants.

[0072] Among them, the low-voltage side voltage and current are obtained through the electric energy meter on the low-voltage side of the transformer; the oil temperature is collected by a temperature sensor placed in the transformer oil; the oil level is collected by an oil level sensor placed in the transformer oil; the operating noise is collected by a noise sensor placed at a specified position of the transformer; and the operating image is collected by a camera located on the top of the transformer.

[0073] Implementing the embodiments of the present invention has the following beneficial effects:

[0074] The present invention performs online monitoring and analysis of the voltage, current, oil temperature, oil level, operating noise and operating image of the low-voltage side of the transformer to achieve health monitoring of the overall state of the transformer cooler group. Therefore, the health monitoring of the cooler group can be achieved based on the overall monitoring of the operating status of the transformer, thereby improving the monitoring results.

[0075] It is worth noting that in the above system embodiment, the various system modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of the various functional modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0076] A person skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, CD-ROM, etc.

[0077] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for monitoring the overall state of a transformer cooler group, characterized in that: The method comprises the following steps: Periodically acquiring operating data and operating images of a transformer carrying a cooler group; wherein the operating data includes low-voltage side voltage, current, oil temperature, oil level and operating noise; The transformer operation data and operation images acquired in each cycle are analyzed to determine the health status of the cooler group.

2. The transformer cooler group overall status monitoring method according to claim 1, characterized in that: The step of analyzing the transformer operation data and operation image acquired in each cycle to determine the health status of the cooler group specifically includes: The low-voltage side voltage of the transformer obtained in each cycle is compared with the preset voltage threshold to obtain the voltage score of each cycle; The transformer current obtained in each cycle is compared with the preset current threshold to obtain the current score of each cycle; The transformer oil temperature obtained in each cycle is compared with the preset oil temperature threshold to obtain the oil temperature score of each cycle; The oil level of the transformer obtained in each cycle is compared with the preset oil level threshold to obtain the oil level score of each cycle; The transformer noise acquired in each cycle is compared with the preset noise threshold to obtain the noise score of each cycle; Perform continuous frame analysis on the transformer operation images acquired in each cycle to obtain the number of frames in each cycle, and compare the number of frames in each cycle with the preset frame number threshold to obtain the image frame score of each cycle; According to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score of each cycle, and combined with the weighting factors assigned to the low-voltage side voltage, current, oil temperature, oil level, operating noise and image, the total score of each cycle is calculated, and the health status of the cooler group is determined based on the total score of each cycle.

3. The transformer cooler group overall state monitoring method according to claim 2, characterized in that: By formula Calculate the total score HS of each cycle; where, P1~P6 are the voltage scores, current scores, oil temperature scores, oil level scores, noise scores and image frame scores in the same cycle respectively; θ1~θ6 are the preset weighting factors corresponding to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score respectively, and are all fixed constants.

4. The transformer cooler group overall status monitoring method according to claim 3, characterized in that: The step of determining the health status of the cooler group according to the total score of each cycle specifically includes: If it is determined that the total score of the current cycle is greater than or equal to the first preset value, it is determined that the health status of the cooler group corresponding to the current cycle is normal; If it is determined that the total score of the current cycle is less than the first preset value and greater than or equal to the second preset value, then the health status of the cooler group corresponding to the current cycle is determined to be sub-healthy; If it is determined that the total score of the current cycle is less than the second preset value, it is determined that the health status of the cooler group corresponding to the current cycle is abnormal.

5. The transformer cooler group overall state monitoring method according to claim 4, characterized in that: The low-voltage side voltage and current are obtained through the electric energy meter on the low-voltage side of the transformer; the oil temperature is collected by a temperature sensor placed in the transformer oil; the oil level is collected by an oil level sensor placed in the transformer oil; the operating noise is collected by a noise sensor placed at a specified position of the transformer; and the operating image is collected by a camera located on the top of the transformer.

6. A transformer cooler group overall status monitoring system, characterized in that: include; An online data acquisition unit, used to periodically acquire operating data and operating images of the transformer carrying the cooler group; wherein the operating data includes low-voltage side voltage, current, oil temperature, oil level and operating noise; The health status detection unit is used to analyze the operation data and operation image of the transformer obtained in each cycle to determine the health status of the cooler group.

7. The transformer cooler group overall status monitoring system according to claim 6, characterized in that: The health status detection unit comprises: A first score calculation module is used to compare the low-voltage side voltage of the transformer obtained in each cycle with a preset voltage threshold to obtain a voltage score for each cycle; A second score calculation module is used to compare the transformer current obtained in each cycle with a preset current threshold to obtain a current score for each cycle; The third score calculation module is used to compare the oil temperature of the transformer obtained in each cycle with the preset oil temperature threshold to obtain the oil temperature score of each cycle; A fourth score calculation module is used to compare the oil level of the transformer obtained in each cycle with a preset oil level threshold to obtain an oil level score for each cycle; A fifth score calculation module, used for comparing the noise of the transformer acquired in each cycle with a preset noise threshold to obtain a noise score of each cycle; The sixth score calculation module is used to perform continuous frame analysis on the operation image of the transformer obtained in each cycle to obtain the number of frames in each cycle, and compare the number of frames in each cycle with a preset frame number threshold to obtain the image frame score of each cycle; The total score calculation and status detection module is used to calculate the total score of each cycle based on the voltage score, current score, oil temperature score, oil level score, noise score and image frame score of each cycle, and combine the weighting factors assigned to the low-voltage side voltage, current, oil temperature, oil level, operating noise and image respectively, and determine the health status of the cooler group based on the total score of each cycle.

8. The transformer cooler group overall status monitoring system according to claim 7, characterized in that: By formula Calculate the total score HS of each cycle; where, P1~P6 are the voltage scores, current scores, oil temperature scores, oil level scores, noise scores and image frame scores in the same cycle respectively; θ1~θ6 are the preset weighting factors corresponding to the voltage score, current score, oil temperature score, oil level score, noise score and image frame score respectively, and are all fixed constants.

9. The transformer cooler group overall status monitoring system according to claim 8, characterized in that: The low-voltage side voltage and current are obtained through the electric energy meter on the low-voltage side of the transformer; the oil temperature is collected by a temperature sensor placed in the transformer oil; the oil level is collected by an oil level sensor placed in the transformer oil; the operating noise is collected by a noise sensor placed at a specified position of the transformer; and the operating image is collected by a camera located on the top of the transformer.

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