Control method, device and equipment of cooler for transformer and storage medium

Abstract

The invention provides a control method, device and equipment for a cooler for a transformer and a storage medium, and the method comprises the steps: circularly obtaining the switching-on and switching-off states of target primary equipment, and the current value and oil temperature value of the transformer; based on the opening and closing state, the current value and the oil temperature value, the number of target coolers meeting the cooling requirement of the transformer is determined; and controlling a plurality of coolers corresponding to the transformer to circularly start and stop based on the target cooler number. According to the technical scheme, energy consumption of the cooler can be reduced while safe and stable operation of the transformer is guaranteed, and cost reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] The present application relates to the field of power engineering technology, and in particular to a control method, device, equipment and storage medium for a transformer cooler. Background Art

[0002] Due to the high volatility of wind and photovoltaic power generation, the intelligent control requirements for power equipment are higher than those of traditional power generation methods. The switching logic of manual control methods for coolers in related technologies is simple and cannot meet the needs of intelligent development in the power industry. Summary of the Invention

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] In the first aspect, the present application proposes a control method for a cooler for a transformer, the method comprising: cyclically acquiring the opening and closing status of a target primary device, the current value, and the oil temperature value of the transformer; based on the opening and closing status, the current value, and the oil temperature value, determining the target number of coolers that meet the cooling requirements of the transformer; and controlling the cyclic start and stop of multiple coolers corresponding to the transformer based on the target number of coolers.

[0005] In one implementation, the determining of the target number of coolers that meet the cooling demand of the transformer based on the opening and closing state, the current value, and the oil temperature value includes at least one of the following: in response to the opening and closing state changing from the open state to the closed state, determining the target number of coolers to be a first number; in response to the opening and closing state being the closed state, and the current value being greater than a first current threshold and / or the oil temperature value being greater than a first oil temperature threshold, determining the target number of coolers to be a second number; wherein the second number is greater than the first number; in response to the opening and closing state being the closed state, and the oil temperature value being greater than a second oil temperature threshold, determining the target number of coolers to be a third number. quantity; wherein, the third quantity is greater than the second quantity; in response to the switch opening and closing state being the closed state, and the oil temperature value being less than or equal to the third oil temperature threshold, the target cooler quantity is determined to be a fourth quantity; wherein, the second oil temperature threshold is greater than or equal to the third oil temperature threshold, and the fourth quantity is less than the third quantity; in response to the switch opening and closing state being the closed state, and the oil temperature value being less than or equal to the fourth oil temperature threshold and / or the current value being less than the second current threshold, the target cooler quantity is determined to be a fifth quantity; wherein, the fifth quantity is less than the fourth quantity; in response to the switch opening and closing state being changed from the closed state to the open state, the target cooler quantity is determined to be zero.

[0006] In one implementation, controlling the cyclic start and stop of multiple coolers corresponding to the transformer based on the target number of coolers includes: determining a first cooler group from the multiple coolers based on the target number of coolers; wherein the number of coolers included in the first cooler group is the target number of coolers; determining the availability status of the coolers in the first cooler group; determining that the coolers in the first cooler group are available, and starting the coolers in the first cooler group; determining that the coolers in the first cooler group are operating normally, and putting the coolers in the second cooler group into a stopped state; wherein the second cooler group includes the other coolers in the multiple coolers except the first cooler group; after a preset time period, determining a third cooler from the second cooler group; wherein the number of the third coolers is less than or equal to the number of coolers in the first cooler group, and the number of the third coolers is less than or equal to the number of coolers in the second cooler group; replacing at least one cooler in the first cooler group with the third cooler to obtain a new first cooler group, and returning to execute the step of determining the availability status of the first cooler group.

[0007] In one implementation, controlling the cyclic start and stop of multiple coolers corresponding to the transformer based on the target number of coolers includes: obtaining the current operating time of each cooler in the first cooler group; in response to a reduction in the target number of coolers, determining a target cooler from the first cooler group based on the current operating time, and controlling the target cooler to stop operating.

[0008] In one implementation, the method further includes: obtaining the incoming power status of the cooler control device and the operating status of the multiple coolers; when the oil temperature value is greater than or equal to the fifth oil temperature threshold and the target primary equipment is in a closed state, in response to the incoming power status being abnormal or the operating status of the multiple coolers being abnormal, sending an alarm signal to the non-electrical protection device.

[0009] In an optional implementation, the contacts corresponding to the signal of the opening and closing status, the contacts corresponding to the power supply status of the control system of the cooler, the contacts corresponding to the oil temperature, and the contacts corresponding to the operating status of the multiple coolers are different.

[0010] In the second aspect, the present application proposes a control device for a cooler for a transformer, the device comprising: an acquisition module for cyclically acquiring the opening and closing status of a target primary device, the current value and the oil temperature value of the transformer; a first processing module for determining the target number of coolers that meet the cooling requirements of the transformer based on the opening and closing status, the current value and the oil temperature value; and a second processing module for controlling the cyclic start and stop of multiple coolers corresponding to the transformer based on the target number of coolers.

[0011] In one implementation, the first processing module can be used to perform at least one of the following: in response to the switch opening and closing state changing from the open state to the closed state, determining that the target number of coolers is a first number; in response to the switch opening and closing state being the closed state, and the current value is greater than a first current threshold and / or the oil temperature value is greater than a first oil temperature threshold, determining that the target number of coolers is a second number; wherein the second number is greater than the first number; in response to the switch opening and closing state being the closed state, and the oil temperature value is greater than a second oil temperature threshold, determining that the target number of coolers is a third number; wherein the third number is greater than the second quantity; in response to the switch opening and closing state being the closed state, and the oil temperature value being less than or equal to the third oil temperature threshold, the target cooler quantity is determined to be a fourth quantity; wherein, the second oil temperature threshold is greater than or equal to the third oil temperature threshold, and the fourth quantity is less than the third quantity; in response to the switch opening and closing state being the closed state, and the oil temperature value being less than or equal to the fourth oil temperature threshold and / or the current value being less than the second current threshold, the target cooler quantity is determined to be a fifth quantity; wherein, the fifth quantity is less than the fourth quantity; in response to the switch opening and closing state being changed from the closed state to the open state, the target cooler quantity is determined to be zero.

[0012] In one implementation, the second processing module can be used to: determine a first cooler group from the multiple coolers based on the target number of coolers; wherein the number of coolers included in the first cooler group is the target number of coolers; judge the available status of the coolers in the first cooler group; determine that the coolers in the first cooler group are available, and start the coolers in the first cooler group; determine that the coolers in the first cooler group are operating normally, and put the coolers in the second cooler group into a stopped state; wherein the second cooler group includes other coolers in the multiple coolers except the first cooler group; after a preset time period, determine a third cooler from the second cooler group; wherein the number of the third coolers is less than or equal to the number of coolers in the first cooler group, and the number of the third coolers is less than or equal to the number of coolers in the second cooler group; replace at least one cooler in the first cooler group with the third cooler to obtain a new first cooler group, and return to execute the step of judging the available status of the first cooler group.

[0013] In one implementation, the second processing module can be used to: obtain the current operating time of each cooler in the first cooler group; in response to a decrease in the number of target coolers, determine a target cooler from the first cooler group based on the current operating time, and control the target cooler to stop operating.

[0014] In an optional implementation, the second processing module can be used to: determine in sequence whether the first cooler is in the automatic position, whether the first cooler has a comprehensive fault, and whether the first cooler is remotely started; in response to the first cooler being in the automatic position, having no comprehensive fault, and not being remotely started, determine that the first cooler is available.

[0015] In one implementation, the device also includes a third processing module, which is used to: obtain the incoming power status of the cooler control device and the operating status of the multiple coolers; when the oil temperature value is greater than or equal to the fifth oil temperature threshold and the target primary equipment is in a closed state, in response to the abnormal incoming power status or the abnormal operating status of the multiple coolers, send an alarm signal to the non-electrical protection device.

[0016] In an optional implementation, the contacts corresponding to the signal of the opening and closing status, the contacts corresponding to the power supply status of the control system of the cooler, the contacts corresponding to the oil temperature, and the contacts corresponding to the operating status of the multiple coolers are different.

[0017] In a third aspect, the present application proposes an electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the control method for a transformer cooler as described in the first aspect.

[0018] In a fourth aspect, the present application proposes a computer-readable storage medium for storing instructions, which, when executed, enables the method described in the first aspect to be implemented.

[0019] In a fifth aspect, the present application proposes a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the method for controlling a transformer cooler as described in the first aspect.

[0020] The control method, device, equipment, and storage medium for transformer coolers provided in this application can determine the target number of coolers to meet the transformer's cooling needs based on the on / off status of the target primary equipment, the transformer's current value, and the oil temperature. This allows for cyclical start and stop control of multiple coolers corresponding to the transformer based on the target number of coolers. This reduces cooler energy consumption while ensuring safe and stable operation of the transformer, achieving cost reduction and efficiency improvement.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is a flow chart of a method for controlling a transformer cooler provided in an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of a cooler input quantity determination process provided by an embodiment of the present application;

[0025] Figure 3 This is a flow chart of another method for controlling a transformer cooler provided in an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of a cooler status determination process provided by an embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of a cooler switching process provided by an embodiment of the present application;

[0028] Figure 6 This is a logic diagram of a cooler full stop protection provided by an embodiment of the present application;

[0029] Figure 7 This is a logic diagram of a cooler full stop hard circuit provided by an embodiment of the present application;

[0030] Figure 8 This is a schematic structural diagram of a control device for a transformer cooler provided in an embodiment of the present application;

[0031] Figure 9 This is a schematic structural diagram of another control device for a transformer cooler provided in an embodiment of the present application;

[0032] Figure 10 It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0034] The following describes a control method and device for a transformer cooler according to an embodiment of the present application with reference to the accompanying drawings.

[0035] Figure 1This is a flow chart of a control method for a transformer cooler provided in an embodiment of the present application. Figure 1 As shown, the method may include but is not limited to the following steps:

[0036] Step S101: cyclically obtain the on / off status of the target primary equipment, the current value and the oil temperature value of the transformer.

[0037] Exemplarily, the on / off status of the target primary device, the secondary current value on the high-voltage side of the transformer, and the oil temperature value of the transformer are obtained at preset time intervals.

[0038] Among them, the above-mentioned target primary equipment may include but is not limited to: generator set outlet circuit breaker and transformer high-voltage side disconnector.

[0039] Step S102: Based on the switch-on / off status, the current value, and the oil temperature value, determine the target number of coolers that meets the transformer cooling demand.

[0040] Exemplarily, when it is determined that the opening and closing state is received, it is determined that the number of coolers that need to be started is at least one, and at least one current threshold range and at least one oil temperature threshold range are set respectively. Each current threshold range corresponds to a different number of coolers, and each oil temperature threshold range corresponds to a different number of coolers. The number of coolers that need to be started is determined based on the current threshold range to which the obtained current value belongs, and the oil temperature threshold range to which the obtained oil temperature value belongs.

[0041] Step S103: Controlling the cyclic start and stop of multiple coolers corresponding to the transformer based on the target number of coolers.

[0042] For example, taking the number of target coolers as M and the total number of coolers as N (M≤N) as an example, select M coolers from the N coolers as the first target cooler and start the first target cooler; after the first target cooler runs for a preset time, select P (P≤M) coolers from the other coolers except the first target cooler as the second target cooler, start the P coolers, and at the same time select P coolers from the M running coolers as the third target cooler, and control the third target cooler to stop running; repeat the above steps to realize the cyclic start and stop of multiple coolers, and record the running time of each cooler. Wherein, P, M, and N are positive integers.

[0043] By implementing the embodiments of the present application, the target number of coolers to meet the transformer's cooling needs can be determined based on the on / off status of the target primary equipment, the transformer's current value, and the oil temperature. This allows the cyclic start and stop of multiple coolers corresponding to the transformer to be controlled based on the target number of coolers. This reduces cooler energy consumption while ensuring safe and stable operation of the transformer, achieving cost reduction and efficiency improvement.

[0044] In some embodiments, based on the opening and closing state, the current signal and the oil temperature signal, determining the target number of coolers that meet the cooling requirements of the transformer includes at least one of the following: in response to the opening and closing state changing from the open state to the closed state, determining the target number of coolers to be a first number; in response to the opening and closing state being the closed state, and the current value being greater than the first current threshold or the oil temperature value being greater than the first oil temperature threshold, determining the target number of coolers to be a second number; wherein the second number is greater than the first number; in response to the opening and closing state being the closed state, and the oil temperature value being greater than the second oil temperature threshold, determining the target number of coolers to be a third number. quantity; wherein, the third quantity is greater than the second quantity; in response to the switch opening and closing state being the closed state, and the oil temperature value being less than or equal to the third oil temperature threshold, the target cooler quantity is determined to be a fourth quantity; wherein, the second oil temperature threshold is greater than or equal to the third oil temperature threshold, and the fourth quantity is less than the third quantity; in response to the switch opening and closing state being the closed state, and the oil temperature value being less than or equal to the fourth oil temperature threshold and / or the current value being less than the second current threshold, the target cooler quantity is determined to be a fifth quantity; wherein, the fifth quantity is less than the fourth quantity; in response to the switch opening and closing state being changed from the closed state to the open state, the target cooler quantity is determined to be zero.

[0045] In some embodiments, the fourth oil temperature threshold may be the same as the first oil temperature threshold, and the second current threshold may be the same as the first current threshold.

[0046] Exemplarily, in response to the transformer high-voltage side disconnector changing from an open state to a closed state, the target number of coolers is determined to be a first number. For example, if the total number of coolers is 3, the first number may be 1.

[0047] Exemplarily, in response to the target primary device being in the closed state and the transformer high-voltage side secondary current output by the transformer protection device being ≥0.1A, the target number of coolers is determined to be the second number.

[0048] Exemplarily, in response to the target primary device being in the closed state and the transformer oil temperature being ≥50° C., the target number of coolers is determined to be the second number.

[0049] Exemplarily, in response to the target primary device's opening and closing state being the closing state and the transformer oil temperature being ≥60° C., the target number of coolers is determined to be the third number.

[0050] Exemplarily, in response to the transformer oil temperature being ≤55° C., the target number of coolers is determined to be the fourth number.

[0051] Exemplarily, in response to the transformer oil temperature being ≤50° C., the target number of coolers is determined to be the fifth number.

[0052] Exemplarily, in response to the transformer high-voltage side secondary current being ≤0.1 A, the target number of coolers is determined to be the fifth number.

[0053] Exemplarily, in response to a generator set outlet circuit breaker switch changing from a closed state to an open state, the target number of coolers is determined to be zero.

[0054] Exemplarily, in response to the transformer high-voltage side disconnector changing from a closed state to an open state, the target number of coolers is determined to be zero.

[0055] It should be noted that, in the embodiments of the present application, the first quantity may be the same as the fifth quantity, and the second quantity may be the same as the fourth quantity.

[0056] For example, taking the total number of coolers as 3, the first number may be 1, the second number may be 2, the third number may be 3, the fourth number may be 2, and the fifth number may be 1.

[0057] As an example, see Figure 2 , Figure 2 This is a schematic diagram of a cooler input quantity determination process provided in an embodiment of the present application. Figure 2 Take three coolers as an example, Figure 2 As shown, one cooler can be started when receiving the closing position signal of the generator output circuit breaker or the transformer high-voltage side disconnector; the second cooler is started when receiving the signal that the transformer high-voltage side secondary current ≥0.1A or the transformer oil temperature ≥50℃ from the transformer protection device; the third cooler is started when receiving the signal that the transformer oil temperature ≥60℃ from the transformer oil thermometer; in the process of the transformer oil temperature dropping from ≥60℃, when receiving the signal that the transformer oil temperature ≤55℃ from the transformer oil thermometer, the cooler with the longest total running time among the three running coolers is automatically exited; when the transformer oil temperature drops to ≤50℃ or the transformer high-voltage side secondary current ≥0.1A signal from the transformer protection device is restored, the cooler with the longer running time of the remaining two running coolers is automatically exited after a delay of 600 seconds; when the closing position of the generator unit output circuit breaker or the transformer high-voltage side disconnector is restored, all three coolers are shut down.

[0058] By implementing the embodiments of the present application, the target number of coolers that meet the transformer cooling requirements can be determined based on the on / off status of the target primary equipment, the transformer's current value, and the oil temperature. This allows the target number of coolers to be controlled to cycle through the start and stop cycles of the multiple coolers corresponding to the transformer based on the target number of coolers. The operating time of each cooler is recorded, allowing the target number of coolers to remain in operation simultaneously. This reduces cooler energy consumption while ensuring the safe and stable operation of the transformer, achieving cost reduction and efficiency improvement.

[0059] In some embodiments, the coolers can be controlled to start and stop cycles according to the target number of coolers, so that the target number of coolers can be kept running simultaneously. Figure 3 , Figure 3 FIG. 1 is a flow chart of another method for controlling a transformer cooler provided in an embodiment of the present application. Figure 3 As shown, the method may include but is not limited to the following steps:

[0060] Step S301: cyclically obtain the on / off status of the target primary equipment, the current value and the oil temperature value of the transformer.

[0061] In the embodiment of the present application, step S301 can be implemented in any of the ways in the embodiments of the present application. The embodiments of the present application do not limit this and will not be described in detail.

[0062] Step S302: Determine the target number of coolers that meets the transformer cooling requirement based on the switch-on / off status, the current signal, and the oil temperature signal.

[0063] In the embodiment of the present application, step S302 can be implemented by any of the methods in the embodiments of the present application. The embodiments of the present application do not limit this and will not be described in detail.

[0064] Step S303: determining a first cooler group from a plurality of coolers based on the target number of coolers.

[0065] The number of coolers included in the first cooler group is the target number of coolers.

[0066] Exemplarily, coolers corresponding to the target number of coolers may be randomly selected from a plurality of coolers as the first cooler group.

[0067] Step S304: determining the availability status of the coolers in the first cooler group.

[0068] In some embodiments of the present application, each cooler may have three control modes: manual, cut-off, and automatic, and may be remotely controlled according to on-site needs.

[0069] As an example, see Figure 4 , Figure 4 This is a schematic diagram of a cooler status judgment process provided by an embodiment of the present application. Figure 4 As shown, it can be determined in sequence whether the cooler is in the automatic position, whether there is a fault, and whether it is remotely started. When it is determined that the cooler is in the automatic position, there is no fault, and it is not remotely started, it is determined that the cooler is available.

[0070] Step S305: Determine whether the coolers in the first cooler group are available, and start the coolers in the first cooler group.

[0071] In other embodiments, if it is determined that at least one cooler in the first cooler group is unavailable, the unavailable cooler is replaced.

[0072] Step S306: Determine that the coolers in the first cooler group are operating normally, and put the coolers in the second cooler group into a stopped state.

[0073] The second cooler group includes other coolers in the plurality of coolers except the first cooler group.

[0074] The second cooler is a cooler other than the first cooler among the multiple coolers.

[0075] In some embodiments, whether the cooler operates normally can be determined based on whether the oil flow and water flow of the cooler are normal.

[0076] For example, if it is determined that the oil flow and the water flow of each first cooler are normal, then it is determined that the first cooler is operating normally, and the coolers other than the first cooler are stopped.

[0077] Step S307: After a delay of a preset time, a third cooler is determined from the second cooler group.

[0078] The number of the third coolers is less than or equal to the number of coolers in the first cooler group, and the number of the third coolers is less than or equal to the number of coolers in the second cooler group.

[0079] The number of the third coolers is less than or equal to the number of the first coolers, and the number of the third coolers is less than or equal to the number of the second coolers.

[0080] For example, taking the example that the first cooler group includes cooler A and the second cooler group includes cooler B and cooler C, any one of cooler B and cooler C is selected as the third cooler.

[0081] For example, taking the example that the first cooler group includes coolers A and B, and the second cooler group includes cooler C, cooler C is used as the third cooler.

[0082] Step S308: Replace at least one cooler in the first cooler group with the third cooler to obtain a new first cooler group, and return to the step of determining the availability status of the first cooler group.

[0083] For example, taking the example that the first cooler group includes cooler A and the third cooler is cooler B, cooler B is used as the new first cooler group.

[0084] For example, taking the first cooler group including cooler A and cooler B, and the third cooler being cooler C as an example, cooler A in the first cooler group is replaced with cooler C to obtain a new first cooler group including cooler B and cooler C.

[0085] In some embodiments, when replacing coolers in the first cooler group, the coolers that have been in operation for a longer period of time may be replaced first.

[0086] For example, taking the first cooler group including cooler A and cooler B, and the new first cooler group including cooler B and cooler C as an example, the next time the coolers in the new first cooler group including cooler B and cooler C are replaced, cooler B is replaced.

[0087] As an example, see Figure 5 , Figure 5 This is a schematic diagram of a cooler switching process provided by an embodiment of the present application. Figure 5 As shown, Figure 5 As shown, if two coolers need to run at the same time, first determine whether cooler 1 and cooler 2 are available. If they are available, start cooler 1 and cooler 2, and detect whether the oil flow and water flow of cooler 1 and cooler 2 are normal. If they are normal, delay for a period of time ( Figure 5 After 10 seconds (for example), cooler No. 3 is turned off.

[0088] After a delay, determine whether cooler 2 and cooler 3 are available. If they are available, start cooler 2 and cooler 3 and check whether the oil flow and water flow of cooler 2 and cooler 3 are normal. If they are normal, delay for a while ( Figure 5 After 10 seconds (for example), cooler No. 1 is turned off.

[0089] After a delay, determine whether cooler 1 and cooler 3 are available. If they are available, start cooler 1 and cooler 3 and check whether the oil flow and water flow of cooler 1 and cooler 3 are normal. If they are normal, delay for a while ( Figure 5 After 10 seconds (for example), cooler No. 1 is turned off.

[0090] By implementing the embodiments of the present application, multiple coolers can be controlled to start and stop in a cycle according to the target number of coolers, thereby reducing cooler energy consumption while ensuring safe and stable operation of the transformer, thereby achieving cost reduction and efficiency improvement.

[0091] In some embodiments, the above method also includes: obtaining the current operating time of each cooler in the first cooler group; in response to the reduction in the number of target coolers, determining the target cooler from the first cooler group based on the current operating time, and controlling the target cooler to stop running.

[0092] For example, in response to the target number of coolers determined at a first moment being less than the target number of coolers determined at a second moment, the difference between the target numbers of coolers at the two moments is obtained, the coolers operating at the first moment are sorted by total operating time, the cooler with the longer total operating time is determined as the target cooler, the target cooler is controlled to stop, and the target number of coolers is equal to the difference, where the second moment is an adjacent moment before the first moment.

[0093] As an example, consider a transformer with coolers A, B, and C, and the target number of coolers corresponding to the second moment is 2. If the target number of coolers determined at the first moment is 1, and both coolers B and C are running, and the operating time of cooler B is greater than that of cooler C, then cooler B is determined as the target cooler and controlled to stop. Even after stopping, cooler B continues to participate in the start-stop cycle. The second moment is the adjacent moment before the first moment.

[0094] In some embodiments, the above method may also include: obtaining the incoming power status of the cooler control device and the operating status of the multiple coolers; when the oil temperature value is greater than or equal to the fifth oil temperature threshold and the target primary equipment is in a closed state, in response to the abnormal incoming power status or the abnormal operating status of the multiple coolers, sending an alarm signal to the non-electrical protection device.

[0095] In some embodiments of the present application, the operating status of the cooler can be determined based on the cooler oil pump signal.

[0096] For example, it is determined that the high-voltage side disconnector is closed, the incoming power supply to the cooler controller is abnormal, and the transformer oil temperature is ≥55°C, and a main transformer cooler full stop trip signal and a main transformer cooler full stop alarm signal are sent to the non-electrical protection device.

[0097] For example, it is determined that the high-voltage side disconnector is closed, all cooler oil pump operation signals disappear, and the transformer oil temperature value is ≥55°C, and a main transformer cooler full stop trip signal and a main transformer cooler full stop alarm signal are sent to the non-electrical protection device.

[0098] For example, it is determined that the generator output circuit breaker is closed, the incoming power supply to the cooler controller is abnormal, and the transformer oil temperature is ≥55°C, and a main transformer cooler full stop trip signal and a main transformer cooler full stop alarm signal are sent to the non-electrical protection device.

[0099] For example, it is determined that the generator output circuit breaker is closed, all cooler oil pump operation signals disappear, and the transformer oil temperature value is ≥55°C, and a main transformer cooler full stop trip signal and a main transformer cooler full stop alarm signal are sent to the non-electrical protection device.

[0100] For example, it is determined that the high-voltage side disconnector is closed, the generator output circuit breaker is closed, all cooler oil pump operation signals disappear, and the transformer oil temperature value is ≥55°C, and a main transformer cooler full stop trip signal and a main transformer cooler full stop alarm signal are sent to the non-electrical protection device.

[0101] For example, it is determined that the high-voltage side disconnector is closed, the generator output circuit breaker is closed, the incoming power supply to the cooler controller is abnormal, and the transformer oil temperature is ≥55°C, and a main transformer cooler full stop trip signal and a main transformer cooler full stop alarm signal are sent to the non-electrical protection device.

[0102] For example, it is determined that the high-voltage side disconnector is closed, the generator output circuit breaker is closed, the incoming power supply of the cooler controller is abnormal, all cooler oil pump operation signals disappear, and the transformer oil temperature value is ≥55°C, and a main transformer cooler full stop trip signal and a main transformer cooler full stop alarm signal are sent to the non-electrical protection device.

[0103] As an example, see Figure 6 , Figure 6 This is a schematic diagram of a cooler full stop protection logic provided by an embodiment of the present application. Figure 6 As shown, when the high-voltage side disconnector of the transformer is closed or the generator output circuit breaker is closed, if the incoming power signals 1 and 2 of the transformer cooler control system 4 disappear or the running signals of the three cooler oil pumps disappear, and the top oil temperature of the transformer is ≥55℃, the preset delay time ( Figure 6 Taking 10 seconds as an example), the "transformer cooler full stop trip" and "transformer cooler full stop alarm" signals are sent to the transformer non-electrical protection device; if the "cooling control power failure start trip" and "non-electrical delay protection" pressure plates in the transformer protection device are put into operation, the non-electrical protection device will delay t1 (for example, 3600S) (if the top oil temperature of the transformer is ≥75℃, the delay t2 = 1200S) and then the output will operate to trip the circuit breakers on all sides of the transformer (for example, the generator outlet side circuit breaker, the 10kV auxiliary power incoming line circuit breaker, and the 500kV transformer high-voltage side circuit breaker).

[0104] In an optional implementation, the contacts corresponding to the signal of the opening and closing status, the contacts corresponding to the power supply status of the control system of the cooler, the contacts corresponding to the oil temperature, and the contacts corresponding to the operating status of the multiple coolers are different.

[0105] As an example, see Figure 7 , Figure 7 This is a logic diagram of a cooler full stop hard circuit provided by the embodiment of the present application. Figure 7 As shown, the contacts for the main transformer's high-voltage disconnect switch, generator output circuit breaker, and top-layer oil temperature position are different from those for executing the cooler shutdown logic. This avoids the risk of failure of both sets of "cooler shutdown protection" due to a single component failure. The operating logic is consistent with the program's non-electrical quantity protection for cooler shutdown. The difference lies in the hard circuit, which, after a 5-second delay via the time-delay relay, issues the "main transformer cooler shutdown trip" and "main transformer cooler shutdown alarm" signals to the main transformer's non-electrical quantity protection device. All other functions remain the same.

[0106] This application also provides a cooler control system, comprising a control cabinet for each phase of the cooler, an electric water inlet valve for the cooler, an oil pump, an oil flow switch, a water flow switch, a transformer oil temperature gauge, and other auxiliary monitoring equipment. The controller in the control cabinet uses a PLC (Programmable Logic Controller) as the core controller and adopts a "dual CPU" redundant configuration function.

[0107] In some embodiments, the control system for the three-phase coolers of transformers A, B, and C utilizes a "one machine, three stations" design approach, which can save investment costs while ensuring safe and reliable equipment operation. The control system's PLC CPU is placed in the control cabinet for the main transformer's phase B cooler, and the control system for the three-phase coolers of the main transformers A, B, and C serves as a substation. A control connection is established between the PLC CPU and the three-phase substation via dual-network 485 communication. This enables control of the electric valves and oil pump motors for each phase of the three coolers, as well as monitoring of the oil and water flow signals for each cooler. The equipment's operating status, monitoring signals, fault signals, and cooling water supply flow signals are transmitted in real time to the unit's computer monitoring system via hard wiring and 485 communication.

[0108] See Figure 8 , Figure 8 Schematic diagram of a control device for a transformer cooler provided in an embodiment of the present application. Figure 8 As shown, the device 800 includes: an acquisition module 801, which is used to cyclically acquire the opening and closing status of the target primary equipment, the current value and the oil temperature value of the transformer; a first processing module, which is used to determine the target number of coolers that meet the cooling requirements of the transformer based on the opening and closing status, the current value and the oil temperature value; and a second processing module, which is used to control the cyclic start and stop of multiple coolers corresponding to the transformer based on the target number of coolers.

[0109] In one implementation, the first processing module 802 can be used to perform at least one of the following: in response to the switch-on / off state changing from the open state to the closed state, determining the target number of coolers to be a first number; in response to the switch-on / off state being the closed state, and the current value being greater than the first current threshold and / or the oil temperature value being greater than the first oil temperature threshold, determining the target number of coolers to be a second number; wherein the second number is greater than the first number; in response to the switch-on / off state being the closed state, and the oil temperature value being greater than the second oil temperature threshold, determining the target number of coolers to be a third number; wherein the third number is greater than The second number; in response to the switch opening and closing state being the closed state and the oil temperature value being less than or equal to the third oil temperature threshold, the target number of coolers is determined to be the fourth number; wherein, the second oil temperature threshold is greater than or equal to the third oil temperature threshold, and the fourth number is less than the third number; in response to the switch opening and closing state being the closed state and the oil temperature value being less than or equal to the fourth oil temperature threshold and / or the current value being less than the second current threshold, the target number of coolers is determined to be the fifth number; wherein, the fifth number is less than the fourth number; in response to the switch opening and closing state changing from the closed state to the open state, the target number of coolers is determined to be zero.

[0110] In one implementation, the second processing module 803 can be used to: determine a first cooler group from multiple coolers based on a target number of coolers; wherein the number of coolers included in the first cooler group is the target number of coolers; determine the available status of the coolers in the first cooler group; determine that the coolers in the first cooler group are available, and start the coolers in the first cooler group; determine that the coolers in the first cooler group are operating normally, and put the coolers in the second cooler group into a stopped state; wherein the second cooler group includes other coolers in the multiple coolers except the first cooler group; after a preset time period, determine a third cooler from the second cooler group; wherein the number of the third cooler is less than or equal to the number of coolers in the first cooler group, and the number of the third cooler is less than or equal to the number of coolers in the second cooler group; replace at least one cooler in the first cooler group with the third cooler to obtain a new first cooler group, and return to execute the step of determining the available status of the first cooler group.

[0111] In one implementation, the second processing module 803 can be used to: obtain the current operating time of each cooler in the first cooler group; in response to a reduction in the number of target coolers, determine the target cooler from the first cooler group based on the current operating time, and control the target cooler to stop operating.

[0112] In an optional implementation, the second processing module 803 can be used to: determine in sequence whether the first cooler is in the automatic position, whether the first cooler has a comprehensive fault, and whether the first cooler is remotely started; in response to the first cooler being in the automatic position, and having no comprehensive fault, and not being remotely started, determine that the first cooler is available.

[0113] In one implementation, the apparatus further includes a third processing module. As an example, see Figure 9 , Figure 9 This is a schematic diagram of the structure of another control device for a transformer cooler provided in an embodiment of the present application. Figure 8 As shown, the device 900 also includes a third processing module 904, which is used to: obtain the incoming power status of the cooler control device and the operating status of multiple coolers; when the oil temperature value is greater than or equal to the fifth oil temperature threshold and the target primary device is in the closed state, in response to the abnormal incoming power status or the abnormal operating status of multiple coolers, send an alarm signal to the non-electrical protection device. Figure 9 Modules 901 to 903 in Figure 8 Modules 801 to 803 in the embodiment have the same structure and function.

[0114] In an optional implementation, the contacts corresponding to the signals of the opening and closing states, the contacts corresponding to the power supply state and oil temperature of the control system of the cooler, and the contacts corresponding to the operating states of multiple coolers are different.

[0115] The device of the present application embodiment can determine the target number of coolers to meet the transformer's cooling needs based on the on / off status of the target primary equipment, the transformer's current value, and the oil temperature. This allows the cyclic start and stop of multiple coolers corresponding to the transformer to be controlled based on the target number of coolers. This reduces cooler energy consumption while ensuring safe and stable operation of the transformer, achieving cost reduction and efficiency improvement.

[0116] It should be noted that the above explanation of the embodiment of the control method for a transformer cooler is also applicable to the control device for the transformer cooler of this embodiment, and will not be repeated here.

[0117] In order to implement the above embodiment, the present application also proposes an electronic device. Figure 10 , Figure 10 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Figure 10 As shown, the electronic device 1000 includes: a processor 1001, and a memory 1002 communicatively connected to the processor 1001; the memory 1002 stores computer-executable instructions; the processor 1001 executes the computer-executable instructions stored in the memory to implement the method provided in the aforementioned embodiment.

[0118] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0119] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0120] In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a way to describe the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0121] In the descriptions of the foregoing embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0122] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0123] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0124] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0125] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0126] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0127] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0128] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for controlling a transformer cooler, characterized in that: include: Circularly obtain the on / off status of the target primary equipment, the current value and oil temperature value of the transformer; Determining a target number of coolers that meet the transformer cooling requirement based on the switch opening and closing state, the current value, and the oil temperature value; Based on the target number of coolers, multiple coolers corresponding to the transformer are controlled to start and stop in a cycle.

2. The method according to claim 1, characterized in that The determining, based on the switch-on / off state, the current value, and the oil temperature value, of a target number of coolers to meet the transformer cooling requirement includes at least one of the following: In response to the switch opening and closing state changing from an open state to a closed state, determining the target number of coolers to be a first number; In response to the switch opening and closing state being the closed state, and the current value being greater than a first current threshold and / or the oil temperature value being greater than a first oil temperature threshold, determining the target number of coolers to be a second number; wherein the second number is greater than the first number; In response to the switch opening and closing state being the closed state and the oil temperature being greater than a second oil temperature threshold, determining the target number of coolers to be a third number; wherein the third number is greater than the second number; In response to the switch opening and closing state being the closed state and the oil temperature value being less than or equal to a third oil temperature threshold, determining the target number of coolers to be a fourth number; wherein the second oil temperature threshold is greater than or equal to the third oil temperature threshold, and the fourth number is less than the third number; In response to the switch opening and closing state being the closed state, and the oil temperature value being less than or equal to a fourth oil temperature threshold value and / or the current value being less than a second current threshold value, determining the target number of coolers to be a fifth number; wherein the fifth number is less than the fourth number; In response to the switch opening and closing state changing from the closed state to the open state, the target number of coolers is determined to be zero.

3. The method according to claim 1, characterized in that The controlling the cyclic start and stop of the plurality of coolers corresponding to the transformer based on the target number of coolers includes: Determining a first cooler group from the plurality of coolers based on the target number of coolers; wherein the number of coolers included in the first cooler group is the target number of coolers; determining an available status of a cooler in the first cooler group; determining that the coolers in the first cooler group are available, and starting the coolers in the first cooler group; Determining that the coolers in the first cooler group are operating normally and setting the coolers in the second cooler group to a stopped state; wherein the second cooler group includes the other coolers in the plurality of coolers except the first cooler group; After a preset time period, determining a third cooler from the second cooler group; wherein the number of the third coolers is less than or equal to the number of coolers in the first cooler group, and the number of the third coolers is less than or equal to the number of coolers in the second cooler group; At least one cooler in the first cooler group is replaced with the third cooler to obtain a new first cooler group, and the step of determining the availability status of the first cooler group is returned to be executed.

4. The method according to claim 3, characterized in that The controlling the cyclic start and stop of the plurality of coolers corresponding to the transformer based on the target number of coolers further includes: Obtaining the current operating time of each cooler in the first cooler group; In response to the number of the target coolers being reduced, a target cooler is determined from the first cooler group based on the current operating time, and the target cooler is controlled to stop operating.

5. The method according to claim 1, wherein The method further comprises: Acquiring the power supply status of the cooler control device and the operating status of the plurality of coolers; When the oil temperature value is greater than or equal to the fifth oil temperature threshold and the target primary equipment is in a closed state, in response to the abnormal state of the incoming power supply or the abnormal operating state of the multiple coolers, an alarm signal is sent to the non-electrical protection device.

6. The method according to claim 5, characterized in that The contacts corresponding to the signal of the opening and closing status, the contacts corresponding to the power supply status of the control system of the cooler, the contacts corresponding to the oil temperature, and the contacts corresponding to the operating status of the multiple coolers are different.

7. A control device for a transformer cooler, characterized in that: include: The acquisition module is used to cyclically acquire the on / off status of the target primary equipment, the current value and the oil temperature value of the transformer; A first processing module is configured to determine a target number of coolers that meets the cooling demand of the transformer based on the switch opening and closing state, the current value, and the oil temperature value; The second processing module is used to control the cyclic start and stop of multiple coolers corresponding to the transformer based on the target number of coolers.

8. An electronic device, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 6 when executed by a processor.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 6 when being executed by a processor.

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