CN118281730A - Autonomous radiating preassembled transformer substation - Google Patents
Autonomous radiating preassembled transformer substation Download PDFInfo
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- CN118281730A CN118281730A CN202410254838.7A CN202410254838A CN118281730A CN 118281730 A CN118281730 A CN 118281730A CN 202410254838 A CN202410254838 A CN 202410254838A CN 118281730 A CN118281730 A CN 118281730A
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- transformer substation
- heat exchange
- transformer
- foundation
- room
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- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000009423 ventilation Methods 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 29
- 239000011229 interlayer Substances 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Transformer Cooling (AREA)
Abstract
The invention discloses an autonomous heat-dissipation preassembled transformer substation, which comprises a transformer substation foundation, a transformer room, a high-voltage room and a low-voltage room, wherein the transformer room is arranged above the transformer substation foundation; wherein a plurality of heat exchange pipes through which external air can flow are respectively prefabricated in the transformer chamber, the high-pressure chamber and the low-pressure chamber. According to the invention, heat exchange pipelines are arranged at four corners of a preassembled transformer substation by utilizing the principle of a chimney effect, the lower parts of the pipelines are communicated with a transformer substation foundation, the upper parts of the pipelines are communicated with an air interlayer of a top cover, a heat dissipation chimney is arranged outside the top cover, cold air in the foundation is pumped out of the top cover through chimney response and is discharged from the top cover chimney, and when the cold air passes through each chamber of the transformer substation, heat exchange is carried out between the heat exchange pipelines and hot air in each chamber, so that the purpose of rectifying and modifying heat dissipation of the preassembled transformer substation is achieved.
Description
Technical Field
The invention relates to the technical field of substations, in particular to an autonomous heat dissipation preassembled transformer substation.
Background
The existing preassembled transformer substation mostly adopts forced ventilation and heat dissipation, namely, a shutter and a heat dissipation fan are installed, but dust is easy to enter the shutter, the dust cannot meet the requirements in areas with high protection level requirements, the fan has a certain failure rate, the periodic maintenance work is increased, and the power supply is also influenced when the fan fails to be replaced.
Based on this, the forced ventilation and heat dissipation method for the preassembled transformer substation has the cost of maintenance of the heat dissipation fan, and the required cost is also high, so that a heat dissipation method for the preassembled transformer substation capable of saving energy consumption and reducing maintenance cost is needed.
Disclosure of Invention
The invention aims to provide an autonomous heat-dissipation preassembled transformer substation, which solves the problem of how to realize energy conservation and autonomously dissipate heat of the preassembled transformer substation.
In order to solve the technical problems, the invention adopts the following technical scheme:
The invention provides an autonomous heat-dissipation preassembled transformer substation, which comprises a transformer substation foundation, a transformer room, a high-voltage room and a low-voltage room, wherein the transformer room is arranged above the transformer substation foundation; wherein a plurality of heat exchange pipes through which external air can flow are respectively prefabricated in the transformer chamber, the high-pressure chamber and the low-pressure chamber.
Further, the heat exchange pipeline is one of a bent pipe, a straight pipe, a reducer pipe and a special pipe;
Or/and the middle part of the heat exchange pipeline is provided with a fin tube for increasing the heat exchange area.
Still further, the upper port of the heat exchange pipe extends from the top covers of the transformer chamber, the high pressure chamber, and the low pressure chamber, and is provided at the upper end thereof with a waterproof cap.
Still further, the lower port of heat transfer pipeline extends from respectively the bottom of transformer room, high pressure room and low pressure room, the lateral wall of transformer substation's basis is seted up and is provided for the air intake of heat transfer pipeline lower port circulation of air.
Still further, be provided with the filter screen in the air intake goes out.
Still further, the lower port of the heat exchange pipeline is used as an air inlet, and the upper port is used as an air outlet.
Still further, the natural ventilation amount N generated by the chimney effect in the heat exchange pipeline can be calculated by the following formula: n=0.171· [ a1·a2/(a1 2+A22）]·[H·(tn-tw) ]0.5;
In the formula, A1 and A2 are respectively the areas of an air inlet and an air outlet (unit m 2）,tn、tW is the temperature (unit ℃) outside the preassembled transformer substation and in the foundation of the preassembled transformer substation), and H is the height difference (unit m) between the air inlet and the air outlet.
Compared with the prior art, the invention has the beneficial technical effects that:
According to the invention, heat exchange pipelines are arranged at four corners of a preassembled transformer substation by utilizing the principle of a chimney effect, the lower parts of the pipelines are communicated with a transformer substation foundation, the upper parts of the pipelines are communicated with an air interlayer of a top cover, a heat dissipation chimney is arranged outside the top cover, cold air in the foundation is pumped out of the top cover through chimney response and is discharged from the top cover chimney, and when the cold air passes through each chamber of the transformer substation, heat exchange is carried out between the heat exchange pipelines and hot air in each chamber, so that the purpose of rectifying and modifying heat dissipation of the preassembled transformer substation is achieved.
The application realizes the independent energy circulation to realize the heat dissipation of the preassembled transformer substation, has no energy consumption, is very environment-friendly and energy-saving, also avoids the problems of faults, overhauling and the like of the fan in the conventional transformer substation heat dissipation, improves the protection level of the preassembled transformer substation, provides possibility for designing the preassembled transformer substation products with higher protection level, has no influence on the operation and maintenance of the transformer substation, completely isolates the wet and cold air in the heat exchange pipeline from the inside of the preassembled transformer substation, does not influence the operation and service life of internal electric elements, and simultaneously dries the foundation of the preassembled transformer substation, thereby being beneficial to prolonging the service life of the foundation and reducing the occurrence probability of faults of cables in the foundation.
Drawings
The invention is further described with reference to the following description of the drawings.
Fig. 1 is a schematic diagram of an arrangement structure of an autonomous heat dissipation preassembled transformer substation according to the present invention;
Fig. 2 is a schematic top view of the autonomous heat dissipation preassembled transformer substation according to the present invention.
Reference numerals illustrate: 1. a heat exchange pipeline; 2. a top cover; 3. a rain cap; 4. a substation foundation; 5. and an air inlet.
Detailed Description
The embodiment discloses an autonomous heat-dissipation preassembled transformer substation, which comprises a transformer substation foundation 4, a transformer room, a high-voltage room and a low-voltage room, wherein the transformer room, the high-voltage room and the low-voltage room are arranged above the transformer substation foundation 4; wherein a plurality of heat exchange pipelines 1 which are convenient for the outside air to flow through are respectively prefabricated in the transformer chamber, the high-pressure chamber and the low-pressure chamber;
As shown in fig. 2, four heat exchange pipes 1 are arranged at four corners in the transformer room, and two heat exchange pipes 1 are respectively arranged in the high-pressure room and the low-pressure room; wherein the inner diameter of the heat exchange channel 1 is set according to the heat exchange amount requirement.
The heat exchange pipeline 1 is preferably vertically penetrating through the upper top and the lower bottom of the transformer chamber, the high-pressure chamber and the low-pressure chamber respectively, specifically, the heat exchange pipeline is installed at four corners of the preassembled transformer substation by specifically utilizing the principle of a chimney effect, the lower part of the pipeline is communicated with a transformer substation foundation, the upper part of the pipeline is communicated with an air interlayer of the top cover, a heat dissipation chimney is installed outside the top cover, cold air in the foundation is pumped out of the top cover through the chimney response, the cold air is discharged from the top cover chimney, and when passing through each chamber of the transformer substation, heat exchange is carried out between the heat exchange pipeline and hot air in each chamber, so that the purpose of rectifying and changing the heat dissipation of the preassembled transformer substation is achieved.
In specific implementation, the heat exchange pipeline 1 is one of a bent pipe, a straight pipe, a reducer pipe and a special pipe; wherein, in order to increase the heat exchange efficiency, a fin tube for increasing the heat exchange area is arranged in the middle of the heat exchange pipeline 1.
As shown in fig. 1, the upper port of the heat exchange pipe 1 extends from the top cover 2 of the transformer room, the high-pressure room and the low-pressure room, and is provided with a rain cap 3, which may be a circular rain cap, at the upper end thereof, so as to prevent rainwater or impurities from penetrating into the heat exchange pipe 1 while communicating the upper air of the transformer substation.
In this embodiment, as shown in fig. 1, the lower ports of the heat exchange pipeline 1 extend from the bottoms of the transformer room, the high-pressure room and the low-pressure room, and an air inlet 5 for providing air circulation for the lower ports of the heat exchange pipeline 1 is provided on the side wall of the transformer substation foundation 4;
in this embodiment, in order to prevent impurities or animals from entering the substation foundation 4, a filter screen may be further installed at the air inlet 5.
(See fig. 1 and 2), four heat exchange pipelines 1 are installed in a transformer room where a transformer of a main heating element of the preassembled transformer substation is located, two heat exchange pipelines 1 are installed in a high-pressure room and a low-pressure room with low heat productivity respectively, the upper parts of the heat exchange pipelines penetrate through a top cover 2 of the preassembled transformer substation and extend to the outside of the transformer substation, a round rain hat 3 is installed at the uppermost part of the heat exchange pipelines, the lower parts of the heat exchange pipelines 1 are communicated with a foundation 4 of the preassembled transformer substation, and air inlets 5 are formed in the periphery of the foundation 4. Common metals such as copper, aluminum and iron have thermal conductivities λ of 385, 237 and 80, respectively, in units of W/(m·k), where K is the temperature difference between the inside and outside of the conductor.
In view of the high cost of copper, we choose an aluminum tube with high heat conductivity coefficient, which is economical, as the heat exchange tube. The transformer capacity of the preassembled transformer substation for power distribution is mainly 400kVA,500kVA and 630kVA, and the energy consumption requirement of the transformer is divided into 1 grade, 2 grade and 3 grade in the national standard, and the transformer is seen as 630kVA and 3 grade transformer with the largest loss (see table 1), wherein the no-load loss is 570W, the load loss is 6200W, and the total loss is 6770W. The heat exchange tubes can dissipate heat q=λ·a·k, where a is the surface area of the heat exchange tubes, as can be seen from fig. 1, 4 heat exchange tubes are total in the transformer room, the internal clear height is 2.3 meters, we choose aluminum tubes with a diameter of 100mm and a thickness of 1.5mm, the total surface area a=0.1×3.14×2.3×4=2.89 m 2, the allowable operating temperature in the transformer room is 45 ℃, the average temperature is less than 10 ℃ due to the fact that most of the interior of the transformer is below the ground level, the average temperature is 20 ℃ after the heat exchange tubes are heated, k=45-20=25 ℃, the total heat dissipation q=237×2.89×25= 17123.25W is 2.53 times of the total loss 6770W of the transformer, the heat dissipation requirement is far greater, and the heat dissipation requirement of the pre-assembled shell itself is not calculated, so the requirement is enough, can also compensate errors in some practical applications, and the heat dissipation requirement of the low-pressure room is less than 1500W, the high-pressure room is more than 1000W, and the heat dissipation requirement of the transformer station is less than 1000W.
Table 110 kV oil immersed three-phase double-winding non-excitation voltage-regulating distribution transformer energy efficiency grade
Meanwhile, the heat exchange tube extending out of the top of the preassembled transformer substation and the interior of the foundation form a chimney effect, so that the air in the foundation can be circulated continuously, the air in the foundation can be kept at about 20 ℃, and the heat dissipation persistence of the heat exchange tube is ensured. Under the action of hot pressing, the natural ventilation quantity N generated by the chimney effect can be calculated by the following formula: n=0.171· [ a1·a2/(a1 2+A22）]·[H·(tn-tw) ]0.5. In the formula, A1 and A2 are respectively the areas of an air inlet and an air outlet (unit m 2）,tn、tW is the temperature (unit ℃) outside the preassembled transformer substation and in the foundation of the preassembled transformer substation), and H is the height difference (unit m) between the air inlet and the air outlet.
According to the mathematical formula a 2+b2 is more than or equal to 2ab, the maximum value of A1.A2/(A1 2+A22) can be 1/2 when the area of the air inlet and the air outlet is A1=A2, and therefore the ventilation quantity is larger when the area ratio of the air outlet to the air inlet is closer to 1. Therefore, in the invention, the air inlet area of the basic air inlet 4 is required to be set according to the total area of the air outlets, so that the air inlet area and the air outlet area are equal. As can be seen from fig. 1, in summer where heat dissipation is most needed, the outdoor average temperature is about 32 ℃, and at this time, the temperature in the substation foundation can be maintained at about 10 ℃, t n-tw =20 ℃, and the natural ventilation rate n=0.171×0.5× (3×20) 0.5=0.66 m 3. And the volume V=pi.r 2·H=3.15×0.05×0.05×2.6=0.02m3 in each heat exchange pipeline can meet the ventilation quantity.
Meanwhile, the formula also shows that under the condition that other conditions are not changed, the larger the height difference H of the air inlet and the air outlet is, the larger the natural ventilation quantity N is, and the better the heat dissipation effect is. Therefore, in some areas with poor ventilation conditions, heat dissipation requirements can be met by adopting modes such as thickening heat exchange pipelines or raising the height of a chimney at the top of the preassembled transformer substation.
The foregoing embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to which the present invention pertains should fall within the scope of the invention as defined in the appended claims without departing from the spirit of the invention.
Claims (5)
1. An autonomous heat-dissipating preassembled transformer substation comprises a transformer substation foundation (4), a transformer room, a high-voltage room and a low-voltage room, wherein the transformer room, the high-voltage room and the low-voltage room are arranged above the transformer substation foundation (4); the method is characterized in that: wherein a plurality of heat exchange pipelines (1) which are convenient for the external air to flow through are respectively prefabricated in the transformer chamber, the high-pressure chamber and the low-pressure chamber;
The lower port of the heat exchange pipeline (1) is used as an air inlet, and the upper port of the heat exchange pipeline is used as an air outlet;
The natural ventilation N generated by the chimney effect in the heat exchange pipeline (1) can be calculated by the following formula: n=0.171· [ a1·a2/(a1 2 +A22）]·[H·(tn-tw) ]0.5;
In the formula, A1 and A2 are respectively the areas of an air inlet and an air outlet (unit m 2）,tn、tW is the temperature (unit ℃) outside the preassembled transformer substation and in the foundation of the preassembled transformer substation), and H is the height difference (unit m) between the air inlet and the air outlet.
2. The self-radiating preassembled transformer substation of claim 1, wherein: the heat exchange pipeline (1) is one of a bent pipe, a straight pipe, a reducer pipe and a special pipe;
Or/and the middle part of the heat exchange pipeline (1) is provided with a fin tube for increasing the heat exchange area.
3. The self-radiating preassembled transformer substation according to any of claims 1-2, characterized in that: the upper port of the heat exchange pipeline (1) extends out of the top cover (2) of the transformer chamber, the high-pressure chamber and the low-pressure chamber, and is provided with a rain cap (3) at the upper end.
4. The self-radiating preassembled transformer substation according to any of claims 1-2, characterized in that: the lower port of the heat exchange pipeline (1) extends from the bottoms of the transformer chamber, the high-pressure chamber and the low-pressure chamber respectively, and an air inlet (5) for providing air circulation for the lower port of the heat exchange pipeline (1) is formed in the side wall of the transformer substation foundation (4).
5. The self-radiating preassembled transformer substation of claim 4, wherein: a filter screen is arranged at the outlet of the air inlet (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410254838.7A CN118281730A (en) | 2024-03-06 | 2024-03-06 | Autonomous radiating preassembled transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410254838.7A CN118281730A (en) | 2024-03-06 | 2024-03-06 | Autonomous radiating preassembled transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN118281730A true CN118281730A (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410254838.7A Pending CN118281730A (en) | 2024-03-06 | 2024-03-06 | Autonomous radiating preassembled transformer substation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2877151A1 (en) * | 2004-10-22 | 2006-04-28 | Schneider Electric Ind Sas | Electric transformer substation, has partition wall with opening to allow air circulation between air inlet and outlet openings respectively placed in upper parts of spaces, of cabin, receiving medium/low voltage apparatus and transformer |
| CN108598963A (en) * | 2018-07-23 | 2018-09-28 | 河北金江电气股份有限公司 | A kind of box-type substation |
| CN216146000U (en) * | 2021-08-24 | 2022-03-29 | 上海电气集团(张家港)变压器有限公司 | Prepackage type transformer substation and heat radiation structure thereof |
| CN114585224A (en) * | 2022-01-27 | 2022-06-03 | 中船重工鹏力（南京）大气海洋信息系统有限公司 | Active ground wave radar heat radiation structure based on chimney effect |
| CN117543392A (en) * | 2023-12-07 | 2024-02-09 | 山东泰开箱变有限公司 | New energy box transformer substation heat abstractor |
-
2024
- 2024-03-06 CN CN202410254838.7A patent/CN118281730A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2877151A1 (en) * | 2004-10-22 | 2006-04-28 | Schneider Electric Ind Sas | Electric transformer substation, has partition wall with opening to allow air circulation between air inlet and outlet openings respectively placed in upper parts of spaces, of cabin, receiving medium/low voltage apparatus and transformer |
| CN108598963A (en) * | 2018-07-23 | 2018-09-28 | 河北金江电气股份有限公司 | A kind of box-type substation |
| CN216146000U (en) * | 2021-08-24 | 2022-03-29 | 上海电气集团(张家港)变压器有限公司 | Prepackage type transformer substation and heat radiation structure thereof |
| CN114585224A (en) * | 2022-01-27 | 2022-06-03 | 中船重工鹏力（南京）大气海洋信息系统有限公司 | Active ground wave radar heat radiation structure based on chimney effect |
| CN117543392A (en) * | 2023-12-07 | 2024-02-09 | 山东泰开箱变有限公司 | New energy box transformer substation heat abstractor |
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