Self-adaptive forced air cooling device

Abstract

The invention discloses a self-adaptive forced air cooling device, which relates to the technical field of power distribution and transformation, and comprises a bottom plate assembly, a placement platform, a transformer positioned at the surface position of the placement platform, heat dissipation assemblies positioned at the two sides of the transformer, a sensor positioned at the top of the transformer, and a PLC (Programmable Logic Controller) positioned at the side surface of the sensor, data of the oil transformer temperature measuring sensor are analyzed and processed through the PLC, then the current running state of the transformer is calculated, and a fan of the transformer is operated according to an analysis result, so that the fan and cooling fins jointly act to cool the transformer. The load capacity of the transformer can be improved by reducing the temperature of the transformer in the working process, so that the transformer can bear larger current within the designed allowable range, and the control scheme of controlling the temperature rise of the transformer according to the temperature rise condition of the transformer is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of electric power distribution and transformation, in particular to an adaptive forced air cooling device. Background Art

[0002] The load of the distribution network shows significant seasonal fluctuations, and the difference between the peak power consumption during holidays and the daily load is huge, which brings severe challenges to the construction and operation and maintenance of the distribution network. At present, there are two main contradictions in the configuration of distribution transformer capacity: if the distribution transformer is selected according to the peak load demand, it will operate at light load for a long time during non-holiday periods, resulting in low equipment utilization and waste of investment; if the distribution transformer is selected according to the conventional load, it is easy to be overloaded during the holidays, threatening the safe operation of the equipment and restricting the high-quality development of the distribution network;

[0003] Although existing governance measures such as high-overload distribution transformers and capacity-adjusting distribution transformers can partially alleviate the problem, they all have obvious defects. High-overload distribution transformers improve short-term overload capacity by enhancing the heat resistance of materials, but long-term high-temperature operation will accelerate insulation aging, and the equipment cost is high, and the cost-effectiveness is insufficient; although capacity-adjusting distribution transformers can adapt to load changes through capacity switching, their mechanical voltage-adjusting tap-changers are complex to maintain and have a high failure rate, making them difficult to adapt to the complex environment of Guizhou's mountainous areas. In addition, the traditional natural cooling method has limited heat dissipation efficiency under overload conditions and cannot economically and flexibly respond to short-term load shocks. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the present invention aims to solve the problem of seasonal overload of distribution transformers.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: an adaptive forced air cooling device, comprising a base plate assembly, a placement platform, a transformer located on the placement platform, heat dissipation assemblies located on both sides of the transformer, a sensor located on the top of the transformer, and a PLC controller located on the side of the sensor.

[0007] As a preferred solution of the adaptive forced air cooling device of the present invention, columns are symmetrically and fixedly connected on both sides of the placement platform.

[0008] As a preferred solution of the adaptive forced air cooling device of the present invention, the column is L-shaped.

[0009] As a preferred solution of the adaptive forced air cooling device of the present invention, fixing holes are provided at both ends of the outer side of the column.

[0010] As a preferred solution of the adaptive forced air cooling device of the present invention, the transformer is fixed in the middle of the placement platform.

[0011] As a preferred solution of the adaptive forced air cooling device of the present invention, the heat dissipation component includes heat sinks symmetrically fixedly connected on both sides of the transformer.

[0012] As a preferred solution of the adaptive forced air cooling device of the present invention, fans are symmetrically and fixedly connected to the surface of the placement platform and located on both sides of the transformer.

[0013] As a preferred solution of the adaptive forced air cooling device of the present invention, the fan is located below the heat sink.

[0014] As a preferred solution of the adaptive forced air cooling device of the present invention, the sensor is an oil transformer temperature sensor, which uses the original temperature measurement hole position of the transformer to accurately measure the transformer oil top temperature.

[0015] As a preferred solution of the adaptive forced air cooling device of the present invention, the PLC controller analyzes the data transmitted by the sensor, transmits the analysis result to the fan, and then operates the fan.

[0016] The beneficial effects of the present invention are as follows: the data of the oil transformer temperature sensor is analyzed and processed by the PLC controller, and then the current transformer operating state is calculated, and the transformer fan is operated according to the analysis result, so that the fan and the heat sink work together to cool the transformer. Lowering the temperature of the transformer during operation can improve its load capacity, so that the transformer can carry a larger current within the design allowable range, thereby realizing a control scheme for controlling the transformer temperature rise according to the transformer temperature rise. At the same time, overheating will accelerate the aging of the transformer material and reduce the service life of the transformer, and overload operation will cause the internal stability of the transformer to increase, increase the risk of failure of internal parts, and affect the electrical performance of the transformer. Therefore, effective cooling can not only reduce the number of transformer failures, but also reduce maintenance costs and increase the stability of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 A schematic structural diagram of an adaptive forced air cooling device according to an embodiment of the present invention;

[0019] Figure 2A front view of an adaptive forced air cooling device according to an embodiment of the present invention;

[0020] Figure 3 A top view of an adaptive forced air cooling device according to an embodiment of the present invention;

[0021] Figure 4 In an adaptive forced air cooling device according to an embodiment of the present invention Figure 1 A magnified schematic diagram of part A;

[0022] Figure 5 A schematic diagram of the circuit system in an adaptive forced air cooling device according to an embodiment of the present invention;

[0023] Figure 6 Transformer overload performance test data in an adaptive forced air cooling device according to an embodiment of the present invention Figure 1 ;

[0024] Figure 7 Transformer overload performance test data in an adaptive forced air cooling device according to an embodiment of the present invention Figure 2 ;

[0025] Figure 8 Transformer overload performance test data in an adaptive forced air cooling device according to an embodiment of the present invention Figure 3 .

[0026] In the figure: 100, base plate assembly 100a, placement platform; 100b, column; 100c, fixing hole; 101, transformer; 102, heat dissipation assembly; 102a, heat sink; 102b, fan; 103, sensor; 104, PLC controller. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1

[0032] Reference Figure 1 and Figure 4 This embodiment provides an adaptive forced air cooling device, including a base plate assembly 100.

[0033] Specifically, the base plate assembly 100 includes a placement platform 100a, a transformer 101 is fixedly connected to the center of the surface of the placement platform 100a, heat dissipation assemblies 102 are symmetrically fixedly connected to both sides of the transformer 101, a sensor 103 is fixedly connected to the top of the transformer 101, and a PLC controller is fixedly connected to one side of the sensor 103 and located on the top of the transformer 101.

[0034] Furthermore, two columns 100b are symmetrically fixedly connected to both sides of the placement platform 100a. Both columns 100b are L-shaped and face outward, so that the bottom of the placement platform 100a can be suspended in the air, which is beneficial to air circulation.

[0035] Preferably, fixing holes 100c are provided at both ends of the outer side of the column 100b, and the placement platform 100a is fixed by fixing the fixing holes 100c.

[0036] When in use, place the placement platform 100a in a suitable position, keep the two columns 100b level, and then fix the placement platform 100a by installing bolts on the fixing holes 100c. At this time, the height of the placement platform 100a from the bottom platform is the height of the column 100b. This design can not only prevent the placement platform 100a from being soaked by rain in bad weather, but also increase the overall ventilation and heat dissipation efficiency, making it more suitable for outdoor scenes.

[0037] Example 2

[0038] Reference Figure 1-Figure 3 , which is the second embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that:

[0039] The heat dissipation assembly 102 includes heat dissipation fins 102 a symmetrically fixedly connected on both sides of the transformer 101 .

[0040] Specifically, the heat sink 102a has a fin-like structure, which increases the area in contact with the air, promotes air flow, enhances the convective heat exchange effect, and allows heat to be dissipated more quickly.

[0041] Furthermore, fans 102b are symmetrically fixedly connected to the surface of the placement platform 100a and located on both sides of the transformer 101. The air volume of the fans 102b is selected based on experimental data, and the appropriate air volume is selected to match the transformers 101 of different capacities.

[0042] Preferably, the fan 102b is located below the heat sink 102a, and can directly guide the cooling airflow to the heat sink 102a to achieve efficient cooling, ensuring that the heat sink can quickly absorb the airflow generated by the fan, thereby improving the heat dissipation efficiency.

[0043] The heat sinks 102a are arranged in a linear array on both sides of the transformer 101 and are symmetrically distributed vertically. Therefore, during the operation of the entire device, the fan 102b can directly guide the heat flow generated by the transformer 101 to the heat sink 102a, enhance the flow of air between the heat sinks 102a, and thus improve the heat exchange rate. Due to the suction and blowing of the fan 102b, heat accumulation on the heat sink 102a can be prevented, and the relative angle of the heat sink surface temperature can be maintained. At the same time, the airflow of the fan 102b can also blow away the dust and impurities accumulated on the surface of the heat sink 102a, reducing the decrease in efficiency of the heat sink 102a due to dust accumulation.

[0044] Example 3

[0045] Reference Figure 1-Figure 8 , which is the third embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that:

[0046] The sensor 103 is an oil-variable temperature sensor, and the fan 102b is an oil-variable fan.

[0047] Specifically, the accuracy of this sensor 103 is more accurate, and it can work stably in harsh environments for a long time. The sensor 103 can also detect the temperature changes of the transformer 101 in real time, which helps to prevent faults. It uses the original temperature measurement hole position of the transformer 101, and can accurately measure the oil top temperature of the transformer 101. It also has strong anti-electromagnetic interference ability and the transmitted signal is stable.

[0048] Furthermore, the PLC controller 104 is an oil-transformer intelligent detection control box, which can analyze the data transmitted by the sensor 103, transmit the analysis result to the fan 102b, and then operate the fan 102b.

[0049] By analyzing and processing the data of the sensor 103 through the PLC controller 104, the current operating status of the transformer 101 can be calculated, and based on the analysis results, the fans 102b on both sides of the transformer 101 are operated, that is, instructions are sent to the fans 102b. When the transformer 101 is under high load and reaches a preset value, the fans 102b are started to force air cooling on the transformer 101 to reduce the temperature rise of the transformer 101, thereby improving the overload capacity of the transformer.

[0050] This device is suitable for active forced air cooling in distribution substations of 400kVA and below. After the pilot application can improve the current situation, it can be promoted and applied in Guizhou Power Grid. It is expected that in extreme cases, it can improve the short-term overload capacity of distribution transformers and effectively solve the problem of equipment operation safety caused by seasonal distribution transformer overload.

[0051] This device performed an overload performance test on transformer 101 before operation and obtained the following data support.

[0052] In the self-cooling mode, the transformer 101 is operated with a 1.8 times overload. After the transformer 101 has been operated for a period of time, the temperature rise of the transformer 101 rises rapidly and soon exceeds the standard temperature rise value of the transformer 101. In the forced air cooling mode, the transformer 101 is operated with a 1.8 times overload. After the transformer 101 has been operated for a period of time, the temperature rise of the transformer 101 depends on the temperature and is below the standard temperature rise value of the transformer 101. As the air volume of the fan 102b increases, the temperature rise stability value of the transformer 101 also decreases.

[0053] Conclusion: By adopting forced air cooling technology for transformer 101, the temperature rise of transformer 101 under overload condition can be effectively reduced, thereby improving the overload operation capacity of the transformer.

[0054] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0055] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0056] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An adaptive forced air cooling device, characterized in that: include, A base plate assembly (100) comprises a placement platform (100a), a transformer (101) located on the surface of the placement platform (100a), heat dissipation assemblies (102) located on both sides of the transformer (101), a sensor (103) located on the top of the transformer (101), and a PLC controller (104) located on the side of the sensor (103).

2. The adaptive forced air cooling device according to claim 1, characterized in that: The two sides of the placement platform (100a) are symmetrically and fixedly connected with upright posts (100b).

3. The adaptive forced air cooling device according to claim 2, characterized in that: The column (100b) is L-shaped.

4. The adaptive forced air cooling device according to claim 3, characterized in that: Both ends of the outer side of the column (100b) are provided with fixing holes (100c).

5. The adaptive forced air cooling device according to claim 1, characterized in that: The transformer (101) is fixed at the middle of the placement platform (100a).

6. The adaptive forced air cooling device according to claim 5, characterized in that: The heat dissipation assembly (102) comprises heat dissipation fins (102a) symmetrically fixedly connected on both sides of the transformer (101).

7. The adaptive forced air cooling device according to claim 6, characterized in that: Fans (102b) are symmetrically and fixedly connected to the surface of the placement platform (100a) and located on both sides of the transformer (101).

8. The adaptive forced air cooling device according to claim 7, characterized in that: The fan (102b) is located below the heat sink (102a).

9. The adaptive forced air cooling device according to claim 8, characterized in that: The sensor (103) is an oil-transformer temperature measurement sensor, which uses the original temperature measurement hole position of the transformer (101) and can accurately measure the oil top temperature of the transformer (101).

10. The adaptive forced air cooling device according to claim 9, characterized in that: The PLC controller (104) analyzes the data transmitted by the sensor (103), transmits the analysis result to the fan (102b), and then operates the fan (102b).

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