Dual-mode spray cooling control system and method for transformer

Abstract

The invention provides a dual-mode spray cooling control system and method for a transformer, and relates to the technical field of transformer cooling. When it is judged that the unit temperature exceeds the first preset temperature value, a first signal is sent out; when it is judged that the unit temperature does not exceed the first preset temperature value but exceeds the second preset temperature value, the evaporative cooling potential index of the environment where the unit is located is obtained; when it is judged that the evaporative cooling potential index is not higher than the first preset value, a first signal is sent out; when the evaporative cooling potential is higher than the first preset value, a second signal is sent out. According to the dual-mode spray cooling control method for the transformer provided by the embodiment of the invention, water resources can be efficiently utilized, unnecessary waste is reduced, and potential influences on the surrounding environment can be reduced; and when more powerful cooling measures need to be taken, liquid water is adopted for cooling, so that the aim of rapidly and effectively realizing cooling is ensured.

Description

Technical Field

[0001] This application relates to the field of transformer cooling technology, specifically to a transformer dual-mode spray cooling control system and method. Background Technology

[0002] Transformer units are typically installed and operate outdoors. Under sustained high temperatures, the surface and internal temperatures of the units rise significantly, making them more susceptible to heat load. This high-temperature environment accelerates the aging process of insulation materials, increasing the potential risk of equipment failure, such as inter-casing short circuits, phase-to-phase short circuits, and in severe cases, even unit shutdown, affecting the stability of the power supply. Currently, the industry commonly uses artificial cooling methods, with liquid water spray systems being a popular choice. These systems spray cooling water onto the unit's casing for rapid heat dissipation. However, because the spraying process usually takes a considerable amount of time, a large amount of cooling water is lost to the ground before it can fully evaporate. This not only results in a significant waste of water resources but also easily leads to water accumulation in the surrounding area, causing slippery surfaces and posing a threat to the safety of operation and maintenance personnel. Furthermore, long-term water accumulation can also affect soil structure and the surrounding ecological environment. Summary of the Invention

[0003] The present application provides a transformer dual-mode spray cooling control system and method that can reduce water waste and minimize the impact on the surrounding environment.

[0004] The specific technical solution of this embodiment is as follows:

[0005] On one hand, embodiments of this application provide a transformer dual-mode spray cooling control method, including:

[0006] S10. Obtain the unit temperature;

[0007] S20. When it is determined that the unit temperature exceeds the first preset temperature value, a first signal is issued to control the spraying of liquid water.

[0008] S30. When it is determined that the unit temperature does not exceed the first preset temperature value, but exceeds the second preset temperature value, obtain the evaporative cooling potential index of the environment where the unit is located.

[0009] S40. When it is determined that the evaporative cooling potential index is not higher than the first preset value, a first signal is issued to control the spraying of liquid water.

[0010] S50. When it is determined that the evaporative cooling potential is higher than the first preset value, a second signal is issued to control the spraying of atomized water.

[0011] In some embodiments, before issuing a second signal after determining that the evaporative cooling potential is higher than a first preset value, the following steps are also included:

[0012] K10, Obtain the wind speed in the environment where the unit is located;

[0013] K20. When it is determined that the wind speed is not higher than the first preset wind speed, the second signal will continue to be issued.

[0014] K30: When the wind speed is determined to be higher than the first preset wind speed, control the spraying of liquid water.

[0015] In some embodiments, issuing a second signal when the evaporative cooling potential is determined to be higher than a first preset value includes the following steps:

[0016] S501. When it is determined that the evaporative cooling potential is higher than the first preset value but not higher than the second preset value, the first signal is issued at the same time as the second signal is issued.

[0017] S502. When it is determined that the evaporative cooling potential is higher than the second preset value, a second signal is issued.

[0018] In some embodiments, obtaining the evaporative cooling potential index includes the following steps:

[0019] S301. Obtain the dry-bulb and wet-bulb temperatures of the environment where the unit is located;

[0020] S302. Determine the evaporative cooling potential index based on the difference between dry-bulb temperature and wet-bulb temperature.

[0021] In some embodiments, the first preset value is 2°~4°, and the second preset value is 4°~6°.

[0022] In some embodiments, after the second signal is issued, the following steps are also included:

[0023] S60. After a preset time, the unit temperature is acquired again; wherein, the unit temperature acquired again in step S60 is the second temperature, and the unit temperature acquired in step S10 is the first temperature.

[0024] S70. When it is determined that the difference between the second temperature and the first temperature is lower than the first preset temperature difference, a third signal is issued to control the switch from spraying atomized water to spraying liquid water.

[0025] In some embodiments, after the first signal is issued, the following steps are also included:

[0026] T10. Obtain the unit temperature again;

[0027] T20. Adjust the liquid water spray flow rate according to the preset instructions and based on the unit temperature.

[0028] On the other hand, embodiments of this application provide a transformer dual-mode spray cooling control system, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement any of the transformer dual-mode spray cooling control methods described in the above embodiments.

[0029] Compared with the prior art, the embodiments of this application have the following beneficial effects:

[0030] The transformer dual-mode spray cooling control method provided in this application embodiment can use atomized water to cool the transformer. This method can not only make efficient use of water resources and reduce unnecessary waste, but also help reduce the potential impact on the surrounding environment. When the transformer temperature is too high and more powerful cooling measures are required, or when the external environmental conditions do not meet the requirements of atomized water cooling, liquid water can be used for cooling to ensure that the cooling target is achieved quickly and effectively, thereby reducing the negative impact of high temperature on the transformer's operating status and equipment life. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic flowchart of a transformer dual-mode spray cooling control method provided in some embodiments of this application;

[0033] Figure 2 This is a flowchart illustrating a transformer dual-mode spray cooling control method provided in other embodiments of this application. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0037] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0038] On the one hand, please refer to Figure 1 , Figure 1 This is a flowchart illustrating a transformer dual-mode spray cooling control method according to some embodiments of this application. The embodiments of this application provide a transformer dual-mode spray cooling control method, including the following steps:

[0039] S10, Obtain the unit temperature.

[0040] In S10, the temperature of the unit's surface can be directly acquired using conventional techniques, such as installing temperature sensors (e.g., thermocouples or infrared temperature probes) on the transformer casing to collect real-time temperature data. Alternatively, the unit's surface temperature can be indirectly acquired by obtaining the temperature of the surrounding environment. Obtaining the ambient temperature can also be achieved using conventional techniques, such as placing ambient temperature sensors around the transformer.

[0041] S20. When it is determined that the unit temperature exceeds the first preset temperature value, a first signal is issued to control the spraying of liquid water.

[0042] In S20, the first preset temperature value is the temperature threshold at which the transformer urgently needs cooling, typically a temperature at which the transformer may be damaged. When the unit temperature exceeds the first preset temperature value, a first signal is issued. Upon receiving the first signal, the spraying equipment sprays liquid water to achieve rapid cooling of the unit. For example, when the transformer unit temperature exceeds 100 degrees Celsius, the first signal is issued, and upon receiving the first signal, the spraying equipment sprays liquid water to achieve rapid cooling of the unit.

[0043] S30. When it is determined that the unit temperature does not exceed the first preset temperature value, but exceeds the second preset temperature value, obtain the evaporative cooling potential index of the environment where the unit is located.

[0044] The second preset temperature value is a threshold set based on human experience. When the transformer unit's temperature is between the second and first preset temperature values, cooling with atomized water can help maintain or lower the transformer unit's current temperature. The evaporative cooling potential index refers to the ability of moisture in the environment to evaporate. A higher evaporative cooling potential index indicates a higher evaporative cooling capacity, lower environmental humidity, and easier evaporation of water to carry away heat. Conversely, a lower evaporative cooling potential index indicates a lower evaporative cooling capacity, higher environmental humidity, and less likely water to evaporate.

[0045] In some examples, the difference between dry-bulb temperature and wet-bulb temperature can be used as an indicator of evaporative cooling potential.

[0046] The second preset temperature value is the temperature value at which the unit needs to be cooled. The unit temperature not exceeding the first preset temperature value means that the unit temperature is less than or equal to the first preset temperature value.

[0047] S40. When it is determined that the evaporative cooling potential index is not higher than the first preset value, a first signal is issued to control the spraying of liquid water.

[0048] In S40, when the evaporative cooling potential index is determined to be no higher than the first preset value, the atomized water cannot evaporate effectively. If atomized water is used for cooling at this time, it will not only waste water, but may also affect heat dissipation and increase risks due to water film adhering to the unit. Based on this, by controlling the sprayed liquid water, the occurrence of the above situation can be reduced, and the unit can be effectively cooled.

[0049] S50. When it is determined that the evaporative cooling potential is higher than the first preset value, a second signal is issued to control the spraying of atomized water.

[0050] In S50, when it is determined that the evaporative cooling potential is higher than the first preset value, it can issue only the second signal, or it can issue the first signal and the second signal at the same time, that is, control the spraying of atomized water while also spraying liquid water.

[0051] In the above embodiments, by acquiring real-time temperature data of the unit and analyzing the evaporative cooling potential index of the environment, the heat dissipation requirements and efficiency optimization space under the current operating conditions are comprehensively evaluated, thereby intelligently selecting and controlling the way of spraying liquid water or atomized water to achieve efficient temperature regulation and energy-saving operation.

[0052] In some examples, the controlled device can be two sets of equipment, each using different pipelines. One set of equipment uses atomizing water nozzles, and the other set uses liquid water nozzles, so as to achieve separate control of the atomizing water nozzles and the liquid water nozzles. This can be achieved by setting solenoid valves on the two sets of equipment respectively to control the on / off of the two sets of equipment separately.

[0053] In other examples, the controlled device can use a single set of equipment, i.e., the same pipeline, and switch between atomized water and liquid water by adding a pressure application device to the pipeline and adjusting the pressure. When liquid water needs to be sprayed, the pressure can be set to a lower value; when atomized water needs to be sprayed, the pressure in the pipeline is increased by the pressure application device so that the liquid water is atomized and sprayed out.

[0054] The above embodiments enable the use of atomized water to cool the transformer. This method not only makes efficient use of water resources and reduces unnecessary waste, but also helps to reduce potential impacts on the surrounding environment. When the transformer temperature is too high and more powerful cooling measures are needed, or when the external environmental conditions do not meet the requirements of atomized water cooling, liquid water can be used for cooling to ensure that the cooling target is achieved quickly and effectively, thereby reducing the negative impact of high temperature on the transformer's operating status and equipment life.

[0055] In some embodiments, before issuing the second signal after determining that the evaporative cooling potential is higher than a first preset value in step S50, the following steps are also included:

[0056] K10: Obtain the wind speed in the environment where the unit is located.

[0057] In K10, when the wind speed in the environment is too high, if atomized water is used to cool the transformer, the flowing air will blow the atomized water away from the area where the unit is located, thus affecting the cooling effect on the unit.

[0058] K20. When the wind speed is determined to be no higher than the first preset wind speed, the second signal will continue to be issued.

[0059] In the K20, when the wind speed is low, the subsequent steps continue to control the spraying of atomized water. The first preset wind speed is a wind speed threshold that can affect the spraying effect of atomized water. The first preset wind speed is not unique. Depending on the model of the atomized water spraying equipment, an appropriate first preset wind speed value can be set based on the operator's experience.

[0060] K30: When the wind speed is determined to be higher than the first preset wind speed, control the spraying of liquid water.

[0061] Because atomized water is relatively lightweight, its use for cooling transformer units in high wind conditions may result in insufficient cooling of the designated area. Therefore, in the above embodiment, before controlling the spraying of atomized water to cool the unit, the wind speed is measured again. If the wind speed is low, atomized water is sprayed; if the wind speed is high and no atomized water is being sprayed, the current operation is stopped, and liquid water is sprayed instead; if atomized water is already being sprayed, liquid water is switched to spraying. This configuration effectively reduces the adverse effects of high wind speeds on the unit's cooling performance, thereby significantly improving the unit's operational stability and overall performance under strong wind conditions.

[0062] Please see Figure 2 , Figure 2 This is a flowchart illustrating a transformer dual-mode spray cooling control method provided in some other embodiments of this application. In some embodiments, in step S50, when it is determined that the evaporative cooling potential is higher than a first preset value, issuing a second signal includes the following steps:

[0063] S501. When it is determined that the evaporative cooling potential is higher than the first preset value but not higher than the second preset value, the first signal is issued at the same time as the second signal is issued.

[0064] In S501, a first signal and a second signal are simultaneously issued to control the simultaneous spraying of liquid water and atomized water. During the simultaneous spraying of liquid water and atomized water, the flow rate of at least one of the liquid water and atomized water can be reduced. In some examples, a first preset value can be set based on the wet-bulb / dry-bulb temperature difference. This method can be used when the auxiliary addition of atomized water can maintain or reduce the temperature of the transformer unit.

[0065] S502. When it is determined that the evaporative cooling potential is higher than the second preset value, a second signal is issued.

[0066] In the above embodiments, when the evaporative cooling potential in the environment where the unit is located is higher than a first preset value but not higher than a second preset value, controlling the simultaneous spraying of liquid water and atomized water can satisfy the cooling needs of the unit while reducing water waste and environmental impact. In some examples, the second preset value can also be set using the dry-bulb / wet-bulb temperature difference.

[0067] In some embodiments, step S30, obtaining the evaporative cooling potential index of the environment where the unit is located, includes the following steps:

[0068] S301. Obtain the dry-bulb temperature and wet-bulb temperature of the environment where the unit is located.

[0069] In S301, the acquisition of dry-bulb temperature and wet-bulb temperature is an existing technology and can be directly achieved through a specific temperature measuring instrument.

[0070] S302. Determine the evaporative cooling potential index based on the difference between dry-bulb temperature and wet-bulb temperature.

[0071] In S302, the difference between dry-bulb temperature and wet-bulb temperature can be used directly as an indicator of evaporative cooling potential, or the evaporative cooling potential indicator can be obtained through certain calculations based on the difference between dry-bulb temperature and wet-bulb temperature.

[0072] In some examples, when multiple dry-bulb and wet-bulb thermometers are installed on-site, it is necessary to obtain the evaporative cooling potential index based on the differences between multiple sets of dry-bulb and wet-bulb temperatures through certain calculations. For example, by averaging the differences between multiple sets of dry-bulb and wet-bulb temperatures, or by weighting the differences between the sets of dry-bulb and wet-bulb temperatures, a final difference value can be obtained. This method can improve the accuracy of the evaporative cooling potential index.

[0073] In other embodiments, a relatively vague evaporative cooling potential index can also be obtained directly using a hygrometer. This method can be applied to situations where safety requirements are not high or the environment is more stable.

[0074] By utilizing the dry-bulb and wet-bulb temperature data of the unit's environment, a more accurate and reliable evaporative cooling potential index can be effectively calculated, thereby providing a more scientific and precise guideline for subsequent control steps.

[0075] In some embodiments, the first preset value is 2°~4°, and the second preset value is 4°~6°.

[0076] In the above embodiments, setting the first preset value to 2°~4° and the second preset value to 4°~6° allows for more precise control of the spraying pattern of liquid water and atomized water according to different evaporative cooling potential index ranges. When the evaporative cooling potential index is between 2° and 4°, spraying both liquid water and atomized water simultaneously ensures the cooling effect while reducing water waste to some extent. When the evaporative cooling potential index is higher than 4°~6°, the water evaporation capacity is strong, and spraying only atomized water can meet the unit's cooling requirements, further reducing water consumption and minimizing the impact on the surrounding environment.

[0077] In some examples, the first preset value can be set to 3° and the second preset value can be set to 5°.

[0078] In some embodiments, after issuing the second signal in step S50, the following steps are also included:

[0079] S60. After a preset time, acquire the unit temperature again. For ease of explanation, the unit temperature acquired again in step S60 will be referred to as the second temperature, and the unit temperature acquired in step S10 will be referred to as the first temperature.

[0080] S70. When it is determined that the difference between the second temperature and the first temperature is lower than the first preset temperature difference, a third signal is issued to control the switch from spraying atomized water to spraying liquid water.

[0081] The first preset temperature difference can be 1℃ to 3℃, for example, it can be set to 2℃. When the unit temperature drops less than or equal to the first preset temperature difference within the preset time, it indicates that the cooling effect of the atomized water has not met expectations. This may be due to changes in environmental conditions (such as increased humidity, reduced wind speed, etc., leading to a decrease in evaporation efficiency). In this case, switching to spraying liquid water can enhance the cooling intensity, ensure that the unit temperature is effectively controlled, and avoid adverse effects on equipment operation due to insufficient cooling.

[0082] In the above embodiments, after the unit is initially cooled by spraying atomized water through the control device, the system will reacquire the real-time temperature value of the unit after a preset time interval to accurately assess the degree of temperature drop. If the temperature drop is detected to be low, i.e., the cooling effect is not as expected, it means that the unit may be facing a high heat load or abnormal operating conditions, and the thermal stress and performance impact will increase significantly. In this case, the system will automatically switch the spray mode from atomized water to liquid water, utilizing the larger heat capacity and direct contact heat dissipation capability of liquid water to achieve a more intense and rapid forced cooling of the unit. In this way, not only can the time the unit is in a high-temperature state be significantly shortened, reducing the risk of equipment damage or operational interruption due to overheating, but it can also effectively improve the operational stability and efficiency of the unit, thereby ensuring that the overall system can operate more smoothly and reliably.

[0083] In some embodiments, after the first signal is issued, the following steps are also included:

[0084] T10, Obtain the unit temperature again.

[0085] T20. Adjust the liquid water spray flow rate according to the preset instructions and based on the unit temperature.

[0086] After the first signal is issued, it can be the first signal issued in step S20, the first signal issued in step S40, or the first signal issued in step S50.

[0087] The preset command refers to the comparison data between the unit's temperature and the liquid water spray flow rate. Based on different unit temperatures, the liquid water is adjusted to different spray flow rates.

[0088] By adjusting the flow rate of the sprayed liquid water according to the specific temperature conditions after controlling the spraying of liquid water, it is possible to reduce water waste and environmental impact.

[0089] This application provides a transformer dual-mode spray cooling control method. First, the unit temperature is acquired. When the unit temperature exceeds a first preset temperature value, a first signal is issued to control the spray equipment to spray liquid water. When the unit temperature does not exceed the first preset temperature value but exceeds a second preset temperature value, it is further determined whether the evaporative cooling potential index of the unit's environment exceeds a first preset value. When it does not exceed the first preset value, a first signal is issued. When it exceeds the first preset value, the wind speed of the unit's environment is determined. When the wind speed is not higher than a first preset wind speed, a second signal is issued to control the spraying of atomized water. When the wind speed is higher than the first preset wind speed, a first signal is issued.

[0090] When or after the first signal is issued, the liquid water ejection flow rate is adjusted based on the unit's temperature.

[0091] In some examples, the first, second, and third signals can be implemented using conventional circuitry, such as a PLC, which issues corresponding control signals based on control logic.

[0092] On the other hand, this application provides a transformer dual-mode spray cooling control system, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the transformer dual-mode spray cooling control method described in any of the above embodiments.

[0093] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for controlling dual-mode spray cooling of a transformer, characterized in that, include: S10. Obtain the unit temperature; S20. When it is determined that the unit temperature exceeds the first preset temperature value, a first signal is issued to control the spraying of liquid water. S30. When it is determined that the unit temperature does not exceed the first preset temperature value, but exceeds the second preset temperature value, obtain the evaporative cooling potential index of the environment where the unit is located. S40. When it is determined that the evaporative cooling potential index is not higher than the first preset value, a first signal is issued to control the spraying of liquid water. S50. When it is determined that the evaporative cooling potential is higher than the first preset value, a second signal is issued to control the spraying of atomized water.

2. The transformer dual-mode spray cooling control method as described in claim 1, characterized in that, Before issuing the second signal after determining that the evaporative cooling potential is higher than the first preset value, the following steps are also included: K10, Obtain the wind speed in the environment where the unit is located; K20. When it is determined that the wind speed is not higher than the first preset wind speed, the second signal will continue to be issued. K30: When the wind speed is determined to be higher than the first preset wind speed, control the spraying of liquid water.

3. The transformer dual-mode spray cooling control method as described in claim 1, characterized in that, When the evaporative cooling potential is determined to be higher than the first preset value, the second signal is issued, including the following steps: S501. When it is determined that the evaporative cooling potential is higher than the first preset value but not higher than the second preset value, the first signal is issued at the same time as the second signal is issued. S502. When it is determined that the evaporative cooling potential is higher than the second preset value, a second signal is issued.

4. The transformer dual-mode spray cooling control method as described in claim 3, characterized in that, Obtaining evaporative cooling potential indicators includes the following steps: S301. Obtain the dry-bulb and wet-bulb temperatures of the environment where the unit is located; S302. Determine the evaporative cooling potential index based on the difference between dry-bulb temperature and wet-bulb temperature.

5. The transformer dual-mode spray cooling control method as described in claim 4, characterized in that, The first preset value is 2°~4°, and the second preset value is 4°~6°.

6. The transformer dual-mode spray cooling control method as described in claim 1, characterized in that, After the second signal is issued, the following steps are also included: S60. After a preset time, the unit temperature is acquired again; wherein, the unit temperature acquired again in step S60 is the second temperature, and the unit temperature acquired in step S10 is the first temperature. S70. When it is determined that the difference between the second temperature and the first temperature is lower than the first preset temperature difference, a third signal is issued to control the switch from spraying atomized water to spraying liquid water.

7. The transformer dual-mode spray cooling control method as described in claim 1, characterized in that, After the first signal is issued, the following steps are also included: T10. Obtain the unit temperature again; T20. Adjust the liquid water spray flow rate according to the preset instructions and based on the unit temperature.

8. A transformer dual-mode spray cooling control system, characterized in that, The device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the transformer dual-mode spray cooling control method according to any one of claims 1-7.

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