Method and system for automatically switching air cooling operation modes of main transformer based on environment temperature

Abstract

The invention provides a method and system for automatically switching a main transformer air cooling operation mode based on the environment temperature. The method comprises the steps that the environment temperature of a main transformer and the oil tank temperature of the main transformer are obtained; according to the environment temperature and a preset temperature range, the operation mode of the air cooling equipment is determined; according to the operation mode of the air cooling equipment and the oil tank temperature of the main transformer, the starting number of the cooling assemblies in each type of cooling assemblies is determined, automatic operation mode switching is achieved, the needed type of cooling assemblies and the starting number of the corresponding cooling assemblies are selected, the flexibility and the automation degree of the air cooling equipment are improved, and the working efficiency is improved. And on the basis of probability, after one cooling assembly in any type of cooling assemblies is randomly selected, the remaining required cooling assemblies are selected according to the sequence, and excessive calculation is not needed, so that the service time of all the cooling assemblies in the type of cooling assemblies tends to be consistent, the purpose of equipment loss equalization is achieved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment cooling control, and particularly to a method and system for automatically switching the air-cooled operation mode of a main transformer based on the ambient temperature. Background Art

[0002] The air-cooled equipment of a main transformer usually consists of multiple submersible pumps and multiple fans, and is used to control the temperature of the transformer oil tank. The traditional air-cooled equipment has the following problems: 1. Fixed operation mode: Regardless of the ambient temperature, the fans and submersible pumps run simultaneously for a long time, and the number of started fans or submersible pumps is fixed, which easily leads to energy consumption waste, increased wear of the fans or submersible pumps.

[0003] 2. Dependence on manual switching: Manual intervention is required for mode switching, which has the risk of misoperation and low efficiency.

[0004] 3. Uneven equipment life: During operation, the operation time of different fans and different submersible pumps is different, and the life loss is out of sync, increasing the maintenance cost.

[0005] Therefore, the existing air-cooled equipment has poor flexibility, low automation, and low balance of equipment loss. Summary of the Invention

[0006] The present invention provides a method and system for automatically switching the air-cooled operation mode of a main transformer based on the ambient temperature, so as to solve the defects of poor flexibility, low automation, and low balance of equipment loss in the existing air-cooled equipment.

[0007] On the one hand, the present invention provides a method for automatically switching the air-cooled operation mode of a main transformer based on the ambient temperature. The air-cooled equipment of the main transformer includes at least one type of cooling component; a plurality of cooling components of each type of cooling component form a circular queue. The method includes: Obtain the ambient temperature where the main transformer is located and the oil tank temperature of the main transformer; Determine the operation mode of the air-cooled equipment according to the ambient temperature and a preset temperature range; Determine the number of started cooling components in each type of cooling component according to the operation mode of the air-cooled equipment and the oil tank temperature of the main transformer; If the number of started cooling components in the i-th type of cooling component is greater than 0 and less than the total number of cooling components in the i-th type of cooling component, randomly select the j-th cooling component in the i-th type of cooling component, and in accordance with the preset direction of the circular queue of the i-th type of cooling component, take the j-th cooling component as the starting position, and sequentially select N - 1 cooling components; where N is the number of started cooling components in the i-th type of cooling component; Based on the principle of starting first and stopping first, in accordance with the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component, the states of the head-started cooling components and the head-unstarted cooling components are switched sequentially.

[0008] According to a method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature provided by the present invention, before sequentially switching the states of the head-started cooling components and the head-unstarted cooling components based on the principle of starting first and stopping first, in accordance with the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component, it further includes: In response to the time setting instruction of the i-th type of cooling component, set the switching time of the i-th type of cooling component.

[0009] According to a method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature provided by the present invention, before sequentially switching the states of the head-started cooling components and the head-unstarted cooling components based on the principle of starting first and stopping first, in accordance with the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component, it further includes: Obtain the number of times the j-th cooling component is selected; Calculate the selection probability of the j-th cooling component according to the number of times selected; Determine the switching time corresponding to the i-th type of cooling component according to the selection probability.

[0010] According to a method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature provided by the present invention, determining the switching time corresponding to the i-th type of cooling component according to the selection probability includes: Determine the difference between the selection probability and the preset probability; Determine the switching time corresponding to the i-th type of cooling component according to the preset correlation between the difference and the switching time; Wherein, the switching time corresponding to the i-th type of cooling component includes multiple sub-switching times. If the difference indicates that the selection probability is less than or equal to the preset probability, the first sub-switching time increases as the difference increases, and the multiple sub-switching times gradually decrease, and the last sub-switching time is greater than or equal to the set minimum switching time; If the difference indicates that the selection probability is greater than the preset probability, the first sub-switching time decreases as the difference increases, and the multiple sub-switching times gradually increase, and the last sub-switching time is less than or equal to the set maximum switching time.

[0011] According to a method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature provided by the present invention, determining the operation mode of the air-cooling device according to the ambient temperature and the preset temperature range includes: If the duration during which the ambient temperature is less than or equal to the lower limit value of the preset temperature range reaches a first preset duration, determine that the operating mode of the air-cooling device is the winter operating mode; If the duration during which the ambient temperature is greater than or equal to the upper limit value of the preset temperature range reaches a second preset duration, determine that the operating mode of the air-cooling device is the summer operating mode; If the duration during which the ambient temperature is between the lower limit value of the preset temperature range and the upper limit value of the preset temperature range reaches a third preset duration, determine that the operating mode of the air-cooling device is the transitional season operating mode.

[0012] According to a method for automatically switching the main transformer air-cooling operating mode based on ambient temperature provided by the present invention, the air-cooling device of the main transformer includes a fan cooling component and a submerged oil pump cooling component; the cooling component in the fan cooling component is a fan, and the cooling component in the submerged oil pump cooling component is a submerged oil pump; According to the operating mode of the air-cooling device and the oil tank temperature of the main transformer, determine the number of starting cooling components in each type of cooling component, including: If the operating mode of the air-cooling device is the winter operating mode, determine that the number of starting fans is 0, and according to the preset correlation between the oil tank temperature and the required number of submerged oil pumps, determine the number of starting submerged oil pumps; If the operating mode of the air-cooling device is the summer operating mode, according to the preset correlation between the oil tank temperature and the required number of fans, determine the number of starting fans, and according to the preset correlation between the oil tank temperature and the required number of submerged oil pumps, determine the number of starting submerged oil pumps; If the operating mode of the air-cooling device is the transitional season operating mode, determine the rate of change of the oil tank temperature according to the oil tank temperature of the main transformer, and according to the preset correlation between the rate of change, the required number of fans, and the required number of submerged oil pumps, determine the number of starting fans and the number of starting submerged oil pumps.

[0013] According to a method for automatically switching the main transformer air-cooling operating mode based on ambient temperature provided by the present invention, it further includes: If the number of starting fans and the number of starting items of the submerged oil pumps are both not 0, according to the switching time of the fan cooling component and the switching time of the submerged oil pump cooling component, detect whether there are switching fans and switching submerged oil pumps to be switched at the same time; If there are switching fans and switching submerged oil pumps to be switched at the same time, adjust the switching time of the switching fans or the switching time of the switching submerged oil pumps.

[0014] On the other hand, the present invention also provides a system for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature. The air-cooling equipment of the main transformer includes at least one type of cooling component; a plurality of cooling components of each type of cooling component form a circular queue. The system includes: An acquisition module, configured to acquire the ambient temperature of the main transformer and the oil tank temperature of the main transformer; A determination module, configured to determine the operation mode of the air-cooling equipment according to the ambient temperature and a preset temperature range; and determine the number of activated cooling components in each type of cooling component according to the operation mode of the air-cooling equipment and the oil tank temperature of the main transformer; A selection module, configured to, if the number of activated cooling components in the i-th type of cooling component is greater than 0 and less than the total number of cooling components in the i-th type of cooling component, randomly select the j-th cooling component in the i-th type of cooling component, and sequentially select N-1 cooling components starting from the j-th cooling component in the preset direction of the circular queue of the i-th type of cooling component; where N is the number of activated cooling components in the i-th type of cooling component; A switching module, configured to, based on the principle of starting first and stopping first, sequentially switch the states of the head-activated cooling component and the head-unactivated cooling component according to the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component.

[0015] On the other hand, the present invention also provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature as described in any one of the above.

[0016] On the other hand, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the method for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature as described in any one of the above.

[0017] On the other hand, the present invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the method for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature as described in any one of the above.

[0018] The method and system for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature provided by the present invention obtain the ambient temperature where the main transformer is located and the oil tank temperature of the main transformer; determine the operation mode of the air-cooling equipment according to the ambient temperature and a preset temperature range; and determine the number of started cooling components in each type of cooling component according to the operation mode of the air-cooling equipment and the oil tank temperature of the main transformer, thereby realizing the automatic switching of the operation mode, selecting the required type of cooling component and the corresponding number of started cooling components thereof, improving the flexibility and automation degree of the air-cooling equipment. And based on probability theory, after randomly selecting one cooling component from any type of cooling component, the remaining required cooling components are selected in sequence. Without excessive calculation, the usage time of all the cooling components in this type of cooling component can be made to tend to be consistent, thereby achieving the purpose of balanced equipment loss and reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a flowchart of the method for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature provided by the embodiment of the present invention; Figure 2 It is a flowchart of the method for setting the switching time corresponding to any type of cooling component in the embodiment of the present invention; Figure 3 It is a structural schematic diagram of the system for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature provided by the embodiment of the present invention; Figure 4 It is a structural schematic diagram of the electronic device provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention with reference to the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0022] Figure 1It is a schematic flowchart of the method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature provided by the embodiments of the present invention. Among them, the air-cooling equipment of the main transformer includes at least one type of cooling component; multiple cooling components of each type of cooling component form a circular queue, that is, after numbering multiple cooling components of each type of cooling component, a circular queue is formed.

[0023] As Figure 1 shown, the execution subject of the method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature provided by the embodiments of the present invention can be an electronic device, and this method mainly includes the following steps: 101. Obtain the ambient temperature where the main transformer is located and the oil tank temperature of the main transformer; In a specific implementation process, temperature sensors can be set at positions such as around the main transformer and the oil tank of the main transformer, so that the ambient temperature where the main transformer is located and the oil tank temperature of the main transformer can be obtained.

[0024] 102. Determine the operation mode of the air-cooling equipment according to the ambient temperature and the preset temperature range; In a specific implementation process, the temperature division boundaries in different seasons can be used to set a temperature range, and the obtained ambient temperature can be compared with the lower limit value and the upper limit value of the preset temperature range to determine the season in which the ambient temperature of the main transformer is located, and different seasons can be corresponded to different operation modes.

[0025] Specifically, if the duration for which the ambient temperature is less than or equal to the lower limit value of the preset temperature range reaches the first preset duration, determine that the operation mode of the air-cooling equipment is the winter operation mode. Among them, the lower limit value of the preset temperature range can be -10°C, and the first preset duration can be 2 hours.

[0026] If the duration for which the ambient temperature is greater than or equal to the upper limit value of the preset temperature range reaches the second preset duration, determine that the operation mode of the air-cooling equipment is the summer operation mode. Among them, the lower limit value of the preset temperature range can be 20°C, and the second preset duration can be 2 hours.

[0027] If the duration for which the ambient temperature is between the lower limit value and the upper limit value of the preset temperature range reaches the third preset duration, determine that the operation mode of the air-cooling equipment is the transitional season operation mode. Among them, the third preset duration can also be 2 hours, and the transitional season operation mode corresponds to the operation mode in spring and autumn seasons.

[0028] 103. Determine the number of cooling components to be started in each type of cooling component according to the operation mode of the air-cooling equipment and the oil tank temperature of the main transformer; In a specific implementation process, for winter or summer, the ambient temperature changes relatively smoothly and is relatively small. Thus, for the main transformer, the temperature of the oil tank is relatively less affected by the ambient temperature. The temperature of the oil tank of the main transformer in winter or summer is also relatively stable, and the rate of change is not very large. Therefore, in the winter operation mode and the summer operation mode, the number of cooling components started in each type of cooling component can be determined in combination with the temperature of the oil tank of the main transformer. For spring and autumn, since the ambient temperature changes greatly, for the main transformer, the temperature of the oil tank is relatively more affected by the ambient temperature, and the change in the temperature of the oil tank of the main transformer is also relatively large. Therefore, in the transitional operation mode corresponding to spring and autumn seasons, the rate of change of the oil tank temperature can be predicted so as to determine the number of cooling components started in each type of cooling component according to the limited rate of change of the temperature.

[0029] In a specific implementation process, if the operation mode of the air-cooling device is the winter operation mode, the number of fans started can be determined to be 0, and, according to the correlation between the preset oil tank temperature and the required number of submersible pumps, the number of submersible pumps started can be determined. That is to say, in the winter operation mode, since the ambient temperature is relatively low, it can already play a certain role in cooling the main transformer. In order to ensure the cooling effect, only a certain number of submersible pumps can be used for cooling, and there is no need for fans to cool. Among them, the specific number of submersible pumps can be found according to the correlation between the preset oil tank temperature and the required number of submersible pumps, and the required number of submersible pumps matching the actual oil tank temperature can be obtained.

[0030] In a specific implementation process, if the operation mode of the air-cooling device is the summer operation mode, the number of fans started is determined according to the correlation between the preset oil tank temperature and the required number of fans, and, according to the correlation between the preset oil tank temperature and the required number of submersible pumps, the number of submersible pumps started is determined. That is to say, in summer, since the ambient temperature is relatively high, the environment where the main transformer is located cannot effectively cool the oil tank, and the temperature of the oil tank of the main transformer is usually relatively high. Relying only on submersible pumps for cooling has relatively poor effect. Therefore, in the summer operation mode, the fans and submersible pumps can be operated simultaneously. Therefore, according to the correlation between the oil tank temperature and the required number of fans, the number of fans corresponding to the actual oil tank temperature can be determined, and, according to the correlation between the oil tank temperature and the required number of submersible pumps, the required number of submersible pumps corresponding to the actual oil tank temperature can be determined.

[0031] In a specific implementation process, if the operating mode of the air-cooling device is the transitional season operating mode, the rate of change of the oil tank temperature of the main transformer is determined based on the oil tank temperature of the main transformer, and the starting number of the fans and the starting number of the submersible pumps are determined according to the preset correlation relationship among the rate of change, the required number of fans, and the required number of submersible pumps. That is to say, in spring and autumn, since the oil tank temperature is greatly affected by the ambient temperature, simply determining the number of fans and the number of submersible pumps based on the oil tank temperature will lead to frequent calculations. Therefore, in this embodiment, the rate of change of the oil tank temperature of the main transformer can be determined based on a fuzzy algorithm, and then based on the preset correlation relationship among the rate of change, the required number of fans, and the required number of submersible pumps, the starting number of the fans and the starting number of the submersible pumps that match the calculated rate of change of the oil tank temperature of the main transformer are determined. For example, when the rate of change of the oil tank temperature of the main transformer is 1 °C, the starting number of the fans can be determined to be 1, and the starting number of the submersible pumps is 0; when the rate of change of the oil tank temperature of the main transformer is 2 °C, the starting number of the fans can be determined to be 2; when the rate of change of the oil tank temperature of the main transformer is 3 °C, the starting number of the fans can be determined to be 1, and the starting number of the submersible pumps is 1. No more examples will be given here.

[0032] 104. If the starting number of the cooling components in the i-th type of cooling component is greater than 0 and less than the total number of the cooling components in the i-th type of cooling component, randomly select the j-th cooling component in the i-th type of cooling component, and in accordance with the preset direction of the circular queue of the i-th type of cooling component, with the j-th cooling component as the starting position, sequentially select N - 1 cooling components. In a specific implementation process, in order to make the usage time of all the cooling components in the i-th type of cooling component relatively uniform, the historical usage duration of each cooling component is usually recorded, and then after mutual comparison, the historical usage durations are sorted, and N cooling components are selected in ascending order.

[0033] However, this method requires comparing the historical usage durations of all the cooling components, and the process is relatively complex. Therefore, in order to select the required N cooling components more broadly, the following technical solution is provided in this embodiment: In a specific implementation process, if the starting number of the cooling components in the i-th type of cooling component is greater than 0 and less than the total number of the cooling components in the i-th type of cooling component, the j-th cooling component in the i-th type of cooling component can be randomly selected, and in accordance with the preset direction (such as the clockwise direction) of the circular queue of the i-th type of cooling component, with the j-th cooling component as the starting position, sequentially select N - 1 cooling components as the cooling components to be started.

[0034] Specifically, from a probability perspective, the probability of selecting any one of the M cooling components is the same. As time goes by and the amount of data increases, the probability of each cooling component being selected is also close. Each cooling component acts on the oil tank of the main transformer, and the required number can also be determined. The operation compliance of the selected cooling components is relatively fixed. Therefore, the operation time of each cooling component will tend to be the same, ultimately making the losses of each cooling component in each type of cooling component tend to be the same, achieving the purpose of loss balance.

[0035] 105. Based on the principle of starting first and stopping first, in accordance with the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component, sequentially switch the states of the head-started cooling component and the head-unstarted cooling component.

[0036] In a specific implementation process, although N cooling components in the i-th type of cooling components are selected, in order to make the losses of all cooling components in the i-th type of cooling components tend to be the same, the N cooling components will not be uniformly used to cool the oil tank. Instead, based on the principle of starting first and stopping first, in accordance with the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component, sequentially switch the states of the head-started cooling component and the head-unstarted cooling component. Among them, the head-started cooling component is the first started cooling component among the started cooling components in the i-th type of cooling components, and the head-unstarted cooling component is the first uncooled component among the unstarted cooling components in the i-th type of cooling components, that is, the cooling component that starts first stops first.

[0037] For example, there are 5 fans respectively denoted as the first fan 1 to the fifth fan 5. 3 fans are needed, and the third fan 3, the fourth fan 4, and the fifth fan 5 are selected. After running for a period of time, the third fan 3 is turned off, the first fan 1 is started, and after running for another period of time, the fourth fan 4 is turned off, and the second fan 2 is started. In this way, one fan is turned off and one fan is started in a cycle. Eventually, when the time is long enough and the amount of data is large enough, based on probability theory, the running durations of the first fan 1 to the fifth fan 5 tend to be the same, that is, the losses of the first fan 1 to the fifth fan 5 tend to be the same.

[0038] In a specific implementation process, if the number of started fans and the number of started items of the submersible oil pump are both non-zero, it is possible to detect whether there are fans to be switched and submersible oil pumps to be switched that are switched at the same time according to the switching time of the fan cooling component and the switching time of the submersible oil pump cooling component; if there are fans to be switched and submersible oil pumps to be switched that are switched at the same time, adjust the switching time of the fan to be switched or the switching time of the submersible oil pump to be switched to prevent the fans and the submersible oil pump from being switched at the same time and reduce the instantaneous current impact. If there are no fans to be switched and submersible oil pumps to be switched that are switched at the same time, the switching can be completed according to the switching time.

[0039] The method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature in this embodiment obtains the ambient temperature of the main transformer and the oil tank temperature of the main transformer; determines the operation mode of the air-cooling equipment according to the ambient temperature and the preset temperature range; and determines the number of started cooling components in each type of cooling component according to the operation mode of the air-cooling equipment and the oil tank temperature of the main transformer, realizing the automatic switching of the operation mode, selecting the required type of cooling component and the corresponding number of started cooling components, improving the flexibility and automation degree of the air-cooling equipment, and based on probability theory, randomly selecting one cooling component from any type of cooling component and then sequentially selecting the remaining required cooling components without excessive calculation, which can make the usage time of all cooling components in this type of cooling component tend to be the same, thereby achieving the purpose of balanced equipment loss and reducing the maintenance cost.

[0040] In a specific implementation process, the switching time of each type of cooling component can be set manually. For example, after receiving the time setting instruction for the i-th type of cooling component from the user, a response can be made and the switching time of the i-th type of cooling component can be set. For example, in the winter operation mode, the submersible oil pump is rotated to start and stop according to the switching time of every 2 * 24 hours; in the summer operation mode, the fans and the submersible oil pump are switched synchronously in a cycle (such as every 7 * 24 hours), but the starting times are staggered to reduce the instantaneous current impact.

[0041] However, this setting method is relatively fixed and cannot be adjusted flexibly. Therefore, the present invention also provides the following embodiments: Figure 2 It is a flowchart of the method for setting the switching time corresponding to any type of cooling component in the embodiment of the present invention. As Figure 2 shown, the method may include the following steps: 201. Obtain the number of times the j-th cooling component is selected; In a specific implementation process, when each cooling component in any type of cooling component is selected, its corresponding counter can be incremented by 1 and recorded. In this way, the number of times the j-th cooling component is selected can be known.

[0042] 202. Calculate the selection probability of the j-th cooling component according to the number of times it is selected. In a specific implementation process, the ratio of the number of times the j-th cooling component is selected to the total number of times all cooling components corresponding to the i-th type of cooling component are selected can be calculated to obtain the selection probability of the j-th cooling component. For example, if the total number of times all cooling components corresponding to the i-th type of cooling component are selected is 100 times, and the number of times the j-th cooling component is selected is 10 times, the selection probability of the j-th cooling component is 0.1.

[0043] 203. Determine the switching time corresponding to the i-th type of cooling component according to the selection probability.

[0044] In a specific implementation process, the difference between the selection probability and a preset probability can be determined; according to the preset correlation between the difference and the switching time, the switching time corresponding to the i-th type of cooling component is determined. Among them, the switching time corresponding to the i-th type of cooling component includes multiple sub-switching times. If the difference indicates that the selection probability is less than or equal to the preset probability, the first sub-switching time increases as the difference increases, and the multiple sub-switching times gradually decrease, and the last sub-switching time is greater than or equal to the set minimum switching time; if the difference indicates that the selection probability is greater than the preset probability, the first sub-switching time decreases as the difference increases, and the multiple sub-switching times gradually increase, and the last sub-switching time is less than or equal to the set maximum switching time.

[0046] That is to say, an average probability value can be set according to the total number of times all cooling components corresponding to the i-th type of cooling component are selected and the number of all cooling components in the i-th type of cooling component, and then the difference between the selection probability of the j-th cooling component and the preset probability is calculated. If the difference indicates that the selection probability is less than or equal to the preset probability, it means that the number of times the j-th cooling component is selected is relatively small, and the overall running duration of the j-th cooling component is relatively short. At this time, a longer running time is required for the j-th cooling component, and a larger switching time can be set. Moreover, the greater the difference between the selection probability of the j-th cooling component and the preset probability, the larger the set switching time.

[0047] However, the probability that the (j + k)-th cooling component is selected may not be high. Therefore, in this embodiment, the switching time corresponding to the i-th type of cooling component can be divided into multiple sub-switching times. The sub-switching time corresponding to the j-th cooling component is the first sub-switching time, and the subsequent multiple sub-switching times can gradually decrease according to a set step size. However, it is necessary to ensure that the last sub-switching time is greater than or equal to the set minimum switching time. In this way, after switching to the (j + k)-th cooling component, the (j + k)-th cooling component can operate for a relatively short duration, making the operating times of all cooling components relatively balanced. Among them, the minimum switching duration is used to limit the highest switching frequency of each cooling component.

[0048] Similarly, if the difference indicates that the selected probability is greater than the preset probability, it means that the number of times the j-th cooling component is selected is relatively large, and the overall operating duration of the j-th cooling component is relatively long. At this time, if it is necessary for the j-th cooling component to operate for a shorter time, a smaller switching time can be set. Moreover, the greater the difference between the selected probability of the j-th cooling component and the preset probability, the smaller the set switching time. In this way, the operating durations of all cooling components in the i-th type of cooling components can tend to be the same.

[0049] However, the probability that the (j + m)-th cooling component is selected may not be low. Therefore, in this embodiment, the sub-switching time corresponding to the j-th cooling component is the first sub-switching time, and the subsequent multiple sub-switching times can gradually increase according to a set step size, but it is necessary to ensure that the last sub-switching time is less than or equal to the set maximum switching time. In this way, after switching to the (j + m)-th cooling component, the (j + m)-th cooling component can operate for a relatively long duration. In this way, the operating durations of all cooling components in the i-th type of cooling components can tend to be the same. Among them, the maximum switching duration is used to limit the lowest switching frequency of each cooling component.

[0050] Based on the same general inventive concept, the present invention also protects a system for automatically switching the main transformer air-cooling operation mode based on the ambient temperature. Next, the system for automatically switching the main transformer air-cooling operation mode provided by the present invention will be described. The system for automatically switching the main transformer air-cooling operation mode described below can be mutually corresponding and referred to with the method for automatically switching the main transformer air-cooling operation mode described above.

[0051] Figure 3 is a schematic structural diagram of the system for automatically switching the main transformer air-cooling operation mode provided by the embodiments of the present invention. As Figure 3 shown, the system for automatically switching the main transformer air-cooling operation mode in this embodiment includes an acquisition module 31, a determination module 32, a selection module 33, and a switching module 34.

[0052] An acquisition module 31, configured to acquire the ambient temperature where the main transformer is located and the oil tank temperature of the main transformer; A determination module 32, configured to determine the operation mode of the air-cooling device according to the ambient temperature and a preset temperature range; and determine the number of activated cooling components in each type of cooling component according to the operation mode of the air-cooling device and the oil tank temperature of the main transformer; A selection module 33, configured to, if the number of activated cooling components in the i-th type of cooling component is greater than 0 and less than the total number of cooling components in the i-th type of cooling component, randomly select the j-th cooling component in the i-th type of cooling component, and sequentially select N-1 cooling components with the j-th cooling component as the starting position according to the preset direction of the circular queue of the i-th type of cooling component; where N is the number of activated cooling components in the i-th type of cooling component; A switching module 34, configured to, based on the principle of starting first and stopping first, sequentially switch the states of the head-activated cooling component and the head-unactivated cooling component according to the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component.

[0053] Figure 4 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. The system for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440. Among them, the processor 410, the communication interface 420, and the memory 430 complete communication with each other through the communication bus 440. The processor 410 may call logical instructions in the memory 430 to execute the method for automatically switching the air-cooling operation mode of the main transformer based on the ambient temperature.

[0054] In addition, when the logical instructions in the above-mentioned memory 430 are implemented in the form of a software functional unit and sold or used as an independent product, they may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc that can store program codes.

[0055] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature provided by the above-mentioned various methods.

[0056] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is realized to execute the method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature provided by the above-mentioned various methods.

[0057] It should be noted that the relevant user personal information that may be involved in the embodiments of the present application is all processed in strict accordance with the requirements of laws and regulations, following the principles of legality, legitimacy, and necessity, for reasonable purposes based on business scenarios, and is the personal information actively provided by users during the use of products / services or generated due to the use of products / services, as well as the personal information obtained with user authorization.

[0058] The user personal information processed by the present application may vary depending on the specific product / service scenario. It is subject to the specific scenario of the user using the product / service and may involve the user's account information, device information, driving information, vehicle information, or other relevant information. The present application will treat the user's personal information and its processing with a high degree of diligence.

[0059] The present application attaches great importance to the security of user personal information and has taken security protection measures that meet industry standards and are reasonable and feasible to protect the user's information and prevent personal information from being accessed, publicly disclosed, used, modified, damaged, or lost without authorization.

[0060] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0061] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature, characterized in that, The air-cooling device of the main transformer includes at least one type of cooling component; multiple cooling components of each type of cooling component form a circular queue, and the method includes: Obtain the ambient temperature where the main transformer is located and the oil tank temperature of the main transformer; Determine the operating mode of the air-cooling device according to the ambient temperature and the preset temperature range; Determine the number of activated cooling components in each type of cooling component according to the operating mode of the air-cooling device and the oil tank temperature of the main transformer; If the number of activated cooling components in the i-th type of cooling component is greater than 0 and less than the total number of cooling components in the i-th type of cooling component, randomly select the j-th cooling component in the i-th type of cooling component, and in the preset direction of the circular queue of the i-th type of cooling component, use the j-th cooling component as the starting position, and sequentially select N - 1 cooling components; where N is the number of activated cooling components in the i-th type of cooling component; Based on the principle of first start first stop, sequentially switch the states of the head-activated cooling component and the head-unactivated cooling component according to the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component.

2. The method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature according to claim 1, wherein Before sequentially switching the states of the head-activated cooling component and the head-unactivated cooling component according to the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component based on the principle of first start first stop, it further includes: In response to the time setting instruction of the i-th type of cooling component, set the switching time of the i-th type of cooling component.

3. The method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature according to claim 1, characterized in that, Before sequentially switching the states of the head-activated cooling component and the head-unactivated cooling component according to the switching time corresponding to the i-th type of cooling component and the order of the circular queue of the i-th type of cooling component based on the principle of first start first stop, it further includes: Obtain the number of times the j-th cooling component is selected; Calculate the selection probability of the j-th cooling component according to the number of times selected; Determine the switching time corresponding to the i-th type of cooling component according to the selection probability; 4. The method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature according to claim 3, characterized in that, Determining the switching time corresponding to the i-th type of cooling component according to the selection probability includes: Determine the difference between the selection probability and the preset probability; Determine the switching time corresponding to the i-th type of cooling component according to the preset correlation between the difference and the switching time; Among them, the switching time corresponding to the i-th type of cooling component includes multiple sub-switching times. If the difference indicates that the selection probability is less than or equal to the preset probability, the first sub-switching time increases as the difference increases, and the multiple sub-switching times gradually decrease, and the last sub-switching time is greater than or equal to the set minimum switching time; If the difference indicates that the selection probability is greater than the preset probability, the first sub-switching time decreases as the difference increases, and the multiple sub-switching times gradually increase, and the last sub-switching time is less than or equal to the set maximum switching time.

5. The method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature according to claim 1, characterized in that, Determining the operating mode of the air-cooling device according to the ambient temperature and the preset temperature range includes: If the duration for which the ambient temperature is less than or equal to the lower limit value of the preset temperature range reaches a first preset duration, determine that the operating mode of the air-cooling device is the winter operating mode; If the duration for which the ambient temperature is greater than or equal to the upper limit value of the preset temperature range reaches a second preset duration, determine that the operating mode of the air-cooling device is the summer operating mode; If the duration for which the ambient temperature is between the lower limit value of the preset temperature range and the upper limit value of the preset temperature range reaches a third preset duration, determine that the operating mode of the air-cooling device is the transitional season operating mode.

6. The method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature according to claim 5, characterized in that, The air-cooling device of the main transformer includes a fan cooling component and a submerged oil pump cooling component; the cooling component in the fan cooling component is a fan, and the cooling component in the submerged oil pump cooling component is a submerged oil pump; Determine the number of started cooling components in each type of cooling component according to the operating mode of the air-cooling device and the tank temperature of the main transformer, including: If the operating mode of the air-cooling device is the winter operating mode, determine that the number of started fans is 0, and determine the number of started submerged oil pumps according to the preset correlation between the tank temperature and the required number of submerged oil pumps; If the operating mode of the air-cooling device is the summer operating mode, determine the number of started fans according to the preset correlation between the tank temperature and the required number of fans, and determine the number of started submerged oil pumps according to the preset correlation between the tank temperature and the required number of submerged oil pumps; If the operating mode of the air-cooling device is the transitional season operating mode, determine the rate of change of the tank temperature according to the tank temperature of the main transformer, and determine the number of started fans and the number of started submerged oil pumps according to the preset correlation between the rate of change, the required number of fans, and the required number of submerged oil pumps.

7. The method for automatically switching the main transformer air-cooling operation mode based on the ambient temperature according to claim 6, characterized in that, It further includes: If the number of started fans and the number of started submerged oil pumps are both non-zero, detect whether there are a to-be-switched fan and a to-be-switched submerged oil pump that are switched at the same time according to the switching time of the fan cooling component and the switching time of the submerged oil pump cooling component; If there are a to-be-switched fan and a to-be-switched submerged oil pump that are switched at the same time, adjust the switching time of the to-be-switched fan or the switching time of the to-be-switched submerged oil pump.

8. A system for automatically switching the main transformer air-cooling operation mode based on the ambient temperature, characterized in that, The air-cooling device of the main transformer includes at least one type of cooling component; multiple cooling components of each type of cooling component form a circular queue, and the system includes: An acquisition module, configured to acquire the ambient temperature where the main transformer is located and the tank temperature of the main transformer; A determination module, configured to determine the operating mode of the air-cooling device according to the ambient temperature and the preset temperature range; and determine the number of started cooling components in each type of cooling component according to the operating mode of the air-cooling device and the tank temperature of the main transformer; A selection module, configured to, if the number of started cooling components in the i-th type of cooling components is greater than 0 and less than the total number of cooling components in the i-th type of cooling components, randomly select the j-th cooling component in the i-th type of cooling components, and sequentially select N-1 cooling components with the j-th cooling component as the starting position in the preset direction of the circular queue of the i-th type of cooling components; where N is the number of started cooling components in the i-th type of cooling components. A switching module, configured to, based on the principle of first start first stop, sequentially switch the states of the head-started cooling components and the head-unstarted cooling components according to the switching time corresponding to the i-th type of cooling components and the order of the circular queue of the i-th type of cooling components.

9. An electronic device, characterized in that, Comprising: It includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for automatically switching the main transformer air-cooled operation mode based on the ambient temperature as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by a processor, it implements the method for automatically switching the main transformer air-cooled operation mode based on the ambient temperature as described in any one of claims 1 to 7.

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