Transformer air cooler and control method thereof

Abstract

The invention discloses a transformer cooling technology, and aims to provide a transformer air cooler which is characterized by comprising a cooler body used for cooling a transformer in a box body; the cooler body comprises a shell, an air outlet formed in the upper side of the back face of the shell and communicated with the box body, an air inlet formed in the lower side of the back face of the shell and communicated with the box body, and a plate heat exchanger arranged in the shell and used for heat exchange between hot air and cold air. The first group of fans are arranged at the top of the shell and used for sucking hot air in the box body into the shell; the second group of fans are arranged on one side of the shell and used for sucking external cold air into the shell and blowing the external cold air to the plate heat exchanger; the heat dissipation baffle is arranged on the other side of the shell, corresponds to the second group of fans and is used for dissipating heat; the control system is used for detecting the temperature in the transformer and controlling the first group of fans and the second group of fans to start and stop; the cooling efficiency of the transformer is obviously improved; the invention is suitable for the technical field of transformer cooling.

Description

Technical Field

[0001] The present invention relates to a transformer cooling technology, and more particularly to a transformer air cooler and a control method thereof. Background Art

[0002] When the transformer is operating normally, if the cooling system of the transformer stops working, it may cause the transformer temperature to be too high and the transformer insulation to age; in severe cases, windings may burn out and the transformer may explode. Therefore, the reliability of the operation of the transformer cooling system directly affects the service life of the transformer, as well as the safety and stability of the power grid operation.

[0003] In the cooling system of the transformer, due to certain specific use environments, it is impossible to provide oil as a cooling medium, so the conventional transformer oil-air cooler or transformer oil-water cooler does not have the advantage of natural resources. Therefore, a transformer air cooler with natural resource advantages is needed. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a transformer air cooler and a control method thereof.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a transformer air cooler, comprising a cooler body for cooling a transformer in a box; the cooler body comprises a shell, an air outlet opened on the upper side of the back side of the shell and connected to the box, an air inlet opened on the lower side of the back side of the shell and connected to the box, a plate heat exchanger arranged in the shell for heat exchange between hot air and cold air, a first group of fans arranged on the top of the shell for sucking hot air in the box into the shell, a second group of fans arranged on one side of the shell for sucking external cold air into the shell and blowing it toward the plate heat exchanger, a heat dissipation baffle arranged on the other side of the shell and corresponding to the second group of fans for heat dissipation, and a control system for detecting the temperature in the transformer and controlling the start and stop of the first group of fans and the second group of fans.

[0006] The present invention is further configured as follows: the first group of fans is arranged at the air outlet of the shell, and can draw the hot air in the box into the shell through the air inlet; the second group of fans is arranged outside the shell, and can introduce cold air and send it into the plate heat exchanger.

[0007] The present invention is further configured as follows: the control system includes a temperature sensor module arranged in a box body for real-time monitoring of the operating temperature of the transformer, a data processing module for receiving temperature data transmitted by the temperature sensor module, and a fan control module for controlling the first group of fans and the second group of fans according to the results of feedback from the data processing module.

[0008] The present invention is further configured as follows: the data processing module calculates the cooling efficiency A according to the real-time temperature T1 of the transformer, the preset temperature T and the minimum safe temperature T2 of the transformer, and the calculation formula is:

[0009]

[0010] Among them, the value of A is between 0 and 1, indicating the cooling efficiency.

[0011] The present invention is further configured to: control the fan according to the value of the cooling efficiency A.

[0012] The present invention is further configured such that the power, rotation speed and air volume of the first group of fans and the second group of fans are adjustable to meet cooling requirements in different situations.

[0013] The present invention is further configured as follows: the control system also includes a self-checking optimization module for improving the overall operating efficiency of the system.

[0014] A control method for a transformer air cooler, characterized in that it comprises the following steps:

[0015] S1. Temperature monitoring: The operating temperature inside the transformer is monitored in real time through the temperature sensor module installed in the box;

[0016] S2, cooling efficiency calculation: the data processing module receives the temperature data transmitted by the temperature sensor module and calculates the cooling efficiency A according to the calculation formula;

[0017] S3, fan start and stop control: The fan control module controls the fan according to the value of the cooling efficiency A fed back by the data processing module, so that the first group of fans suck the hot air inside the box into the plate heat exchanger from the air inlet, and at the same time the second group of fans blows the external cold air to the plate heat exchanger, so that the hot air is converted into cold air through the plate heat exchanger and then enters the box through the air outlet, and the second group of fans blows the hot air out of the shell from the heat dissipation baffle, thereby reducing the heat brought in and reducing the temperature of the transformer in the box:

[0018] S301, when A>0.7, it is determined that the current cooling effect is good, and the control system can choose to reduce the rotation speeds of the first group of fans and the second group of fans;

[0019] S302, when 0.4<A≤0.7, it is determined that the current cooling effect is normal, and the control system maintains the rotation speeds of the first group of fans and the second group of fans;

[0020] S303, when A≤0.4, it is determined that the current cooling effect is poor, and the control system controls the first group of fans and the second group of fans to adjust to the maximum speed to enhance the cooling effect;

[0021] S4. Dynamically adjust the preset temperature: The control system dynamically adjusts the preset temperature T according to the historical temperature data and real-time monitoring conditions to adapt to load changes. The specific method is as follows:

[0022] S401, when the real-time transformer temperature T1 is continuously monitored to be greater than the preset temperature T for more than 3 minutes, the preset temperature T is appropriately increased;

[0023] S402, when the transformer real-time temperature T1 is continuously lower than the transformer safety minimum temperature T2 within 3 minutes, the preset temperature T is appropriately lowered;

[0024] S5. Control system self-check optimization: The control system automatically optimizes the start and stop logic and speed setting of the fan by recording and analyzing the historical cooling efficiency A, thereby improving the overall operating efficiency of the system.

[0025] The beneficial effects of the present invention are:

[0026] 1. Compared with the prior art, the transformer air cooler and its control method of the present invention adopts a collaborative working design of two sets of fans, which significantly improves the cooling effect, effectively uses air as a cooling medium, and reduces the cost of use; the first set of fans is responsible for sucking the hot air inside the box into the plate heat exchanger from the air inlet, while the second set of fans introduces external cold air into the plate heat exchanger; this two-way air flow design can effectively enhance the heat exchange process and increase the heat dissipation rate. Compared with traditional cooling methods, the present invention can reduce the temperature inside the box to a safe level in a shorter time, thereby ensuring that the transformer can still operate stably under high load conditions, and has the advantage of natural resources. Efficient cooling not only improves the overall performance of the equipment, but also reduces the failure rate caused by excessive temperature, effectively extending the service life of the transformer.

[0027] 2. The transformer air cooler and control method of the present invention are equipped with an advanced temperature monitoring system to obtain the temperature information of the transformer in real time. These data are analyzed by the data processing module, and then the start and stop and speed of the fan are adjusted intelligently. When the temperature change is detected, the system can respond quickly and adjust the working state of the fan to ensure that the transformer is always within a safe temperature range. This intelligent control method not only improves the cooling efficiency, but also enables the transformer to maintain the best operating state under different conditions, avoiding the uncertainty caused by manual operation. This degree of automation greatly reduces the need for manual monitoring and improves the safety and reliability of equipment operation.

[0028] 3. In the present invention, the control system has the ability to dynamically adjust the preset temperature, and can autonomously optimize the cooling strategy based on historical temperature data and real-time monitoring conditions; when the temperature change trend of the transformer is detected, the system will automatically increase or decrease the set temperature to adapt to the current load demand; this flexible adjustment mechanism can better cope with the temperature changes caused by load fluctuations, thereby maintaining the efficient operation of the transformer; at the same time, this adaptability not only improves the response speed of the cooling system, but also reduces energy consumption and improves economic benefits. By optimizing the set temperature, the transformer can operate in the best manner under different working conditions, avoiding losses caused by improper temperature control.

[0029] 4. The control system of the present invention is equipped with a self-checking optimization module, which can record and analyze historical cooling efficiency data, and automatically optimize the start and stop logic and speed setting of the fan accordingly; this self-checking mechanism enables the control system to continuously improve its cooling efficiency during long-term operation and adapt to different situations; through in-depth analysis of historical data, the system can identify the optimal operating parameters and strategies to maximize the cooling efficiency; it not only improves the intelligence level of the control system, but also effectively reduces operation and maintenance costs and reduces dependence on manual intervention; in addition, the continuous optimization of the control system provides a data foundation and technical accumulation for the future development of transformer cooling technology, and has good foresight and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the transformer air cooler of the present invention.

[0031] Figure 2 This is the internal structure diagram of the transformer air cooler of the present invention.

[0032] Figure 3 It is a schematic diagram of the connection between the transformer air cooler and the box body of the present invention.

[0033] Figure 1-3 Figure numerals: 1. shell; 2. air outlet; 3. air inlet; 4. plate heat exchanger; 5. first group of fans; 6. second group of fans; 7. heat dissipation baffle. DETAILED DESCRIPTION

[0034] Reference Figure 1-3 The transformer air cooler and the control method thereof are further described in the following embodiments.

[0035] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0036] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0037] Figures 1 to 3 A transformer air cooler shown in the figure includes a cooler body for cooling a transformer in a box; the cooler body includes a shell 1, an air outlet 2 opened on the upper side of the back of the shell 1 and connected to the box, an air inlet 3 opened on the lower side of the back of the shell 1 and connected to the box, a plate heat exchanger 4 arranged in the shell 1 for heat exchange between hot air and cold air, a first group of fans 5 arranged on the top of the shell 1 for sucking hot air in the box into the shell 1, a second group of fans 6 arranged on one side of the shell 1 for sucking external cold air into the shell 1 and blowing it to the plate heat exchanger 4, a heat dissipation baffle 7 arranged on the other side of the shell 1 and corresponding to the second group of fans 6 for heat dissipation, and a heat dissipation baffle 7 for detecting the temperature in the transformer and controlling the first group of fans 5 and The control system of the start and stop of the second group of fans 6; the first group of fans 5 is arranged at the air outlet 2 of the housing 1, and can draw the hot air in the box into the housing 1 through the air inlet 3; the second group of fans 6 is arranged outside the housing 1, and can introduce and send cold air into the plate heat exchanger 4; compared with the prior art, the transformer air cooler and its control method of the present invention adopts the collaborative working design of two groups of fans, so that the cooling effect is significantly improved, the air is effectively used as a cooling medium, and the use cost is reduced; the first group of fans 5 is responsible for sucking the hot air inside the box from the air inlet 3 into the plate heat exchanger 4, and the second group of fans 6 introduces the external cold air into the plate heat exchanger 4; this two-way air flow design can effectively enhance the heat exchange process and increase the heat dissipation speed. Compared with the traditional cooling method, the present invention can reduce the temperature in the box to a safe level in a shorter time, thereby ensuring that the transformer can still operate stably under high load conditions, and has the advantage of natural resources. The efficient cooling not only improves the overall performance of the equipment, but also reduces the failure rate caused by excessive temperature, and effectively prolongs the service life of the transformer.

[0038] The control system includes a temperature sensor module arranged in the box for real-time monitoring of the working temperature of the transformer, a data processing module for receiving the temperature data transmitted by the temperature sensor module, and a fan control module for controlling the first group of fans 5 and the second group of fans 6 according to the feedback result of the data processing module; the transformer air cooler and its control method of the present invention are equipped with an advanced temperature monitoring system to obtain the temperature information of the transformer in real time. These data are analyzed by the data processing module, and then the start and stop and speed of the fan are adjusted intelligently. When the temperature change is detected, the system can respond quickly and adjust the working state of the fan to ensure that the transformer is always within a safe temperature range. The intelligent control method not only improves the cooling efficiency, but also enables the transformer to maintain the best operating state under different conditions, avoiding the uncertainty caused by human operation. This degree of automation greatly reduces the need for manual monitoring and improves the safety and reliability of equipment operation.

[0039] The data processing module calculates the cooling efficiency A according to the real-time temperature T1 of the transformer, the preset temperature T and the minimum safe temperature T2 of the transformer. The calculation formula is:

[0040]

[0041] The value of A is between 0 and 1, indicating the cooling efficiency; the fan is controlled according to the value of the cooling efficiency A.

[0042] The power, rotation speed and air volume of the first group of fans 5 and the second group of fans 6 are adjustable to meet the cooling requirements in different situations, so as to facilitate adaptation to various situations.

[0043] The control system also includes a self-checking and optimization module for improving the overall operating efficiency of the system; the control system of the present invention is equipped with a self-checking and optimization module, which can record and analyze historical cooling efficiency data, and automatically optimize the start and stop logic and speed setting of the fan based on this; this self-checking mechanism enables the control system to continuously improve its cooling efficiency during long-term operation and adapt to different situations; through in-depth analysis of historical data, the system can identify the optimal operating parameters and strategies to maximize the cooling efficiency; it not only improves the intelligence level of the control system, but also effectively reduces operation and maintenance costs and reduces dependence on manual intervention; in addition, the continuous optimization of the control system provides a data foundation and technical accumulation for the future development of transformer cooling technology, and has good foresight and promotion value.

[0044] A control method for a transformer air cooler, characterized in that it comprises the following steps:

[0045] S1. Temperature monitoring: The operating temperature inside the transformer is monitored in real time through the temperature sensor module installed in the box;

[0046] S2, cooling efficiency calculation: the data processing module receives the temperature data transmitted by the temperature sensor module and calculates the cooling efficiency A according to the calculation formula;

[0047] S3, fan start and stop control: The fan control module controls the fan according to the value of the cooling efficiency A fed back by the data processing module, so that the first group of fans 5 suck the hot air inside the box from the air inlet 3 into the plate heat exchanger 4, and at the same time the second group of fans 6 blows the external cold air to the plate heat exchanger 4, so that the hot air is converted into cold air through the plate heat exchanger 4 and then enters the box through the air outlet 2, and the second group of fans 6 blows the hot air out of the shell 1 from the heat dissipation baffle 7, thereby reducing the heat brought and reducing the temperature of the transformer in the box:

[0048] S301, when A>0.7, it is determined that the current cooling effect is good, and the control system can choose to reduce the rotation speeds of the first group of fans 5 and the second group of fans 6;

[0049] S302, when 0.4<A≤0.7, it is determined that the current cooling effect is normal, and the control system maintains the rotation speeds of the first group of fans 5 and the second group of fans 6;

[0050] S303, when A≤0.4, it is determined that the current cooling effect is poor, and the control system controls the first group of fans 5 and the second group of fans 6 to adjust to the maximum speed to enhance the cooling effect;

[0051] S4. Dynamically adjust the preset temperature: The control system dynamically adjusts the preset temperature T according to the historical temperature data and real-time monitoring conditions to adapt to load changes. The specific method is as follows:

[0052] S401, when the real-time transformer temperature T1 is continuously monitored to be greater than the preset temperature T for more than 3 minutes, the preset temperature T is appropriately increased;

[0053] S402, when the transformer real-time temperature T1 is continuously lower than the transformer safety minimum temperature T2 within 3 minutes, the preset temperature T is appropriately lowered;

[0054] In the present invention, the control system has the ability to dynamically adjust the preset temperature, and can autonomously optimize the cooling strategy based on historical temperature data and real-time monitoring conditions; when the temperature change trend of the transformer is detected, the system will automatically increase or decrease the set temperature to adapt to the current load demand; this flexible adjustment mechanism can better cope with the temperature changes caused by load fluctuations, thereby maintaining the efficient operation of the transformer; at the same time, this adaptability not only improves the response speed of the cooling system, but also reduces energy consumption and improves economic benefits. By optimizing the set temperature, the transformer can operate in the best way under different working conditions, avoiding losses caused by improper temperature control;

[0055] S5. Control system self-check optimization: The control system automatically optimizes the start and stop logic and speed setting of the fan by recording and analyzing the historical cooling efficiency A, thereby improving the overall operating efficiency of the system.

[0056] The present invention significantly improves the cooling efficiency of the transformer, ensures stable operation under high load conditions, reduces the risk of failure and prolongs the service life of the equipment. At the same time, it also reduces energy consumption and improves the overall economic benefits. While improving equipment performance, it promotes the intelligentization process of the power industry and can meet the high requirements of modern industry for reliability and efficiency. It has a simple and reasonable structure, is easy to manufacture, and is easy to operate. It avoids the defects in the prior art and is suitable for popularization and implementation.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer air cooler, characterized in that: The invention comprises a cooler body for cooling a transformer in a box; the cooler body comprises a shell (1), an air outlet (2) provided on the upper back side of the shell (1) and connected to the box, an air inlet (3) provided on the lower back side of the shell (1) and connected to the box, a plate heat exchanger (4) arranged in the shell (1) for heat exchange between hot air and cold air, a first set of fans (5) arranged at the top of the shell (1) for sucking hot air in the box into the shell (1), a second set of fans (6) arranged on one side of the shell (1) for sucking external cold air into the shell (1) and blowing it toward the plate heat exchanger (4), a heat dissipation baffle (7) provided on the other side of the shell (1) and corresponding to the second set of fans (6) for heat dissipation, and a control system for detecting the temperature in the transformer and controlling the start and stop of the first set of fans (5) and the second set of fans (6).

2. A transformer air cooler according to claim 1, characterized in that: The first set of fans (5) is arranged at the air outlet (2) of the shell (1) and is capable of drawing hot air in the box into the shell (1) through the air inlet (3); the second set of fans (6) is arranged outside the shell (1) and is capable of drawing cold air into the plate heat exchanger (4).

3. A transformer air cooler according to claim 1 or 2, characterized in that: The control system comprises a temperature sensor module arranged in a box body for real-time monitoring of the operating temperature of the transformer, a data processing module for receiving temperature data transmitted by the temperature sensor module, and a fan control module for controlling the first group of fans (5) and the second group of fans (6) according to the feedback result of the data processing module.

4. A transformer air cooler according to claim 3, characterized in that: The data processing module calculates the cooling efficiency A according to the real-time temperature T1 of the transformer, the preset temperature T and the minimum safe temperature T2 of the transformer. The calculation formula is:

5. Among them, the value of A is between 0 and 1, indicating the cooling efficiency.

6. The transformer air cooler according to claim 4, characterized in that: The fan is controlled according to the value of the cooling efficiency A.

7. The transformer air cooler according to claim 1, characterized in that: The power, rotation speed and air volume of the first group of fans (5) and the second group of fans (6) are adjustable to meet the cooling requirements in different situations.

8. The transformer air cooler according to claim 1, characterized in that: The control system also includes a self-checking optimization module for improving the overall operating efficiency of the system.

9. A control method for a transformer air cooler as described in claims 1 to 7, characterized in that: The following steps are involved: S1. Temperature monitoring: The operating temperature inside the transformer is monitored in real time through the temperature sensor module installed in the box; S2, cooling efficiency calculation: the data processing module receives the temperature data transmitted by the temperature sensor module and calculates the cooling efficiency A according to the calculation formula; S3, fan start and stop control: the fan control module controls the fan according to the value of the cooling efficiency A fed back by the data processing module, so that the first group of fans (5) draws the hot air inside the box from the air inlet (3) into the plate heat exchanger (4), and at the same time the second group of fans (6) blows the external cold air to the plate heat exchanger (4), so that the hot air is converted into cold air through the plate heat exchanger (4) and then enters the box through the air outlet (2), and the second group of fans (6) blows the hot air out of the casing (1) from the heat dissipation baffle (7), thereby reducing the heat brought in and reducing the temperature of the transformer in the box: S301, when A>0.7, it is determined that the current cooling effect is good, and the control system can choose to reduce the rotation speed of the first group of fans (5) and the second group of fans (6); S302, when 0.4<A≤0.7, it is determined that the current cooling effect is normal, and the control system maintains the rotation speeds of the first group of fans (5) and the second group of fans (6); S303, when A≤0.4, it is determined that the current cooling effect is poor, and the control system controls the first group of fans (5) and the second group of fans (6) to adjust to the maximum speed to enhance the cooling effect; S4. Dynamically adjust the preset temperature: The control system dynamically adjusts the preset temperature T according to the historical temperature data and real-time monitoring conditions to adapt to load changes. The specific method is as follows: S401, when the real-time transformer temperature T1 is continuously monitored to be greater than the preset temperature T for more than 3 minutes, the preset temperature T is appropriately increased; S402, when the real-time temperature T1 of the transformer is continuously lower than the minimum safe temperature T2 of the transformer within 3 minutes, the preset temperature T is appropriately lowered; S5. Control system self-check optimization: The control system automatically optimizes the start and stop logic and speed setting of the fan by recording and analyzing the historical cooling efficiency A, thereby improving the overall operating efficiency of the system.

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