CN222214944U

CN222214944U - Transformer room and box-type substation

Info

Publication number: CN222214944U
Application number: CN202323565898.0U
Authority: CN
Inventors: 徐青亚; 尚尔发; 庞金鹏; 王文杰; 司贞员; 陈静雅; 赵飞; 杨婷婷; 岳朝鹏
Original assignee: Henan Senyuan Electric Co Ltd
Current assignee: Henan Senyuan Electric Co Ltd
Priority date: 2023-12-26
Filing date: 2023-12-26
Publication date: 2024-12-20
Anticipated expiration: 2033-12-26

Abstract

The utility model relates to the technical field of ventilation of transformer substations, and in particular to a transformer room and a box-type transformer substation. A transformer room comprises a box body, a transformer mounting structure is provided in the box body, and an annular heat dissipation channel is also provided in the box body for being arranged below the transformer to blow air toward the gap between the high and low voltage windings of the transformer. An air inlet is provided at the lower position of the side wall of the box body, and the utility model is characterized in that a heat dissipation fan for exhausting air outward is provided at the upper position of the box body, and an inner guide plate cantilevered toward the inside of the box body is provided on the inner side wall of the box body, and the inner guide plate is located between the heat dissipation fan and the air inlet so that the airflow from the air inlet to the negative pressure area at the top of the box body flows through the outer area of the transformer. Compared with the prior art, the annular heat dissipation channel at the bottom for the outer side of the high-voltage winding can be omitted, and the natural wind can be reasonably used to dissipate the heat to the outer side of the transformer, saving costs, reducing the operating power of the bottom fan, and reducing the energy consumption of the fan.

Description

Transformer room and box-type substation

Technical Field

The utility model relates to the technical field of ventilation of transformer substations, in particular to a transformer room and a box-type transformer substation.

Background

The box-type transformer substation is widely applied to new energy power generation projects due to the characteristics of small radiation, more environmental friendliness and the like, and mainly depends on the internal and external exchange of air to take away heat generated in the box body for cooling, and generally depends on a cooling fan of the box transformer for cooling. The new energy power generation market also rapidly develops, the installed capacity of wind turbines in wind power generation projects is also larger and larger, more and more 5MW even larger fans are used, and the capacity of corresponding box-type substations is also larger and larger.

But this kind of high-capacity case becomes also exposes some problems in long-term use, say dry-type transformer heat dissipation problem is especially special, traditional to dry-type transformer heat dissipation mode adopts and is provided with the centrifugal fan that directly blows to the transformer in the box lower part, the box lateral wall is provided with the induced draught fan, but centrifugal fan can directly blow in transformer bottom channel-section steel or iron core department when blowing, lead to the transformer body heat dissipation not good, the case that causes when high temperature weather is shut down the number of the problem of the like is not countless each year, has caused huge economic loss for the user, thereby reduced the competitiveness of product.

Therefore, the problem that the centrifugal fan directly blows the transformer heat dissipation not good to above-mentioned problem, current authority bulletin number is CN 216849562U's a dry-type transformer has disclosed through the bottom in the high-voltage winding outside and the bottom in clearance between the high-low voltage winding all is provided with annular air duct, and set up on annular air duct and blow the air cock accurate to dry-type transformer and blow the heat dissipation and take away the heat, and set up the exhaust fan at the top of transformer box, the lateral wall of transformer box is equipped with the air intake, the quick hot-air that discharges, further improved radiating efficiency. However, the bottom fan required by the two groups of annular air ducts arranged at the bottom of the coil winding of the dry-type transformer for realizing heat dissipation of the inner side and the outer side of the dry-type transformer has larger power and higher cost.

Disclosure of utility model

The utility model aims to provide a transformer room which is used for solving the problems that the power of a bottom fan required by the heat dissipation of the inner side and the outer side of a dry-type transformer is high and the cost is high due to the fact that two groups of annular air ducts are arranged at the bottom of a coil winding of the existing dry-type transformer.

The transformer room adopts the following technical scheme that the transformer room comprises a box body, a transformer installation structure is arranged in the box body, an annular heat dissipation channel which is arranged below a transformer and used for blowing towards a gap between high-voltage windings and low-voltage windings of the transformer is also arranged in the box body, an air inlet is arranged at the lower position of the side wall of the box body, a heat dissipation fan which can exhaust air outwards is arranged at the upper position of the box body, an inner guide plate which is overhanging towards the inside of the box body is arranged on the inner side wall of the box body, and the inner guide plate is positioned between the heat dissipation fan and the air inlet so that air flow flowing from the air inlet to a negative pressure area at the top of the box body flows through an outer side area of the transformer.

Further, the inner deflector is adapted to be disposed near but not higher than the top of the high and low voltage windings of the transformer.

Further, the top cap of box includes upper roof and lower floor's top cap, and upper roof is for sheltering from the rain-proof top cap in the box top, heat dissipation fan is including setting up the top fan that is corresponding to transformer mounting structure top position on the lower floor's top cap, is provided with the high temperature gas lateral part exhaust lateral part air exit that supplies top fan to suck in the two-layer top cap between the two-layer top cap.

Further, a side wall air outlet is formed in the side wall of the box body, and the heat dissipation fan further comprises a side fan arranged at the side wall air outlet.

Further, the side fans are located on the side walls of the box body near the top and below the lower top cover.

Further, the width of upper top cover at lateral part fan one side is greater than the lower floor's top cover, is provided with decurrent turn-ups on the upper top cover, and lateral part air exit between the two-layer top cover is located between turn-ups and the lower floor's top cover.

Further, the side wall of the box body is provided with a downward-inclined flow guiding inclined plate at a position close to the side air outlet for guiding hot air of the side air outlet to an area far away from the side wall of the box body.

The transformer room improves the existing dry type transformer, the annular heat dissipation channel blowing towards the gap between the high-voltage winding and the low-voltage winding of the transformer is arranged below the transformer to precisely blow and dissipate heat in the transformer body, the heat dissipation fan arranged at the upper position of the box body is used for rapidly sucking out heat exhausted from the inside of the transformer body, the inner guide plate overhanging towards the inside of the box body is arranged on the inner side wall of the box body, the inner guide plate is arranged between the heat dissipation fan and the air inlet, cold air entering from the air inlet at the position below the side wall of the box body is not directly drained upwards from the side wall of the box body, but is guided to the outside area of the transformer by the inner guide plate, then enters the negative pressure area at the top of the box body and is sucked by the heat dissipation fan, and therefore heat dissipation of the outside of the transformer is achieved.

The utility model aims to provide a box-type transformer substation, which is used for solving the problems that the power of a bottom fan required by the heat dissipation of the inner side and the outer side of a dry-type transformer is larger and the cost is higher due to the fact that two groups of annular air ducts are arranged at the bottom of a coil winding of the dry-type transformer of the existing box-type transformer substation.

The box-type transformer substation adopts the following technical scheme that the box-type transformer substation comprises a high-voltage chamber, a low-voltage chamber and a transformer chamber, wherein the transformer chamber comprises a box body, a transformer installation structure is arranged in the box body, an annular heat dissipation channel which is arranged below a transformer and is used for blowing towards a gap between high-voltage windings and low-voltage windings of the transformer is also arranged in the box body, an air inlet is arranged at the lower position of the side wall of the box body, a heat dissipation fan which is used for exhausting outwards is arranged at the upper position of the box body, an inner guide plate which is hung towards the inside of the box body is arranged on the inner side wall of the box body, and the inner guide plate is positioned between the heat dissipation fan and the air inlet so that air flow flowing from the air inlet to the negative pressure area at the top of the box body flows through the outer side area of the transformer.

The box-type transformer substation has the beneficial effects that the annular heat dissipation channel blowing towards the gap between the high-voltage winding and the low-voltage winding of the transformer is arranged below the transformer to precisely blow and dissipate heat in the transformer body, the heat dissipation fan arranged at the upper position of the box body is used for rapidly sucking out the heat exhausted from the inside of the transformer body, the inner guide plate overhanging towards the inside of the box body is arranged on the inner side wall of the box body, the inner guide plate is arranged between the heat dissipation fan and the air inlet, cold air entering from the air inlet at the lower position of the side wall of the box body cannot directly flow upwards from the side wall after entering the box body, but is guided to the outside area of the transformer by the inner guide plate, then enters the negative pressure area at the top of the box body and is sucked by the heat dissipation fan, so that the heat dissipation of the air inlet at the side wall of the box body is precisely guided to the outside of the transformer, compared with the prior art, the annular heat dissipation channel arranged at the outer side of the high-voltage winding at the bottom can be omitted, the outside of the transformer is reasonably utilized for dissipating the heat by natural wind, the running cost of the fan is reduced, and the running cost of the fan is reduced.

Drawings

FIG. 1 is an overall schematic of an embodiment of a box-type substation of the present utility model;

Fig. 2 is a schematic structural view of an embodiment of the transformer room of the present utility model;

FIG. 3 is a schematic diagram of the transformer in FIG. 2;

Fig. 4 is a schematic diagram of the wind direction of fig. 2.

In the figure, 1, an upper top cover; 2, a top fan, 3, a side fan, 4, an inner guide plate, 5, a shutter, 6, a centrifugal fan, 7, a square insulating air duct, 8, a low-voltage winding, 9, an iron core, 10, a high-voltage winding, 11, a lower top cover, 12, a side air outlet, 13, a box body, 14, a guide inclined plate, 15, a cylindrical air duct, 16, an annular insulating air duct and 17, and an insulating air duct support.

Detailed Description

The features and capabilities of the present utility model are described in further detail below in connection with the examples.

First, the technical scheme of the present utility model is generally described:

The box-type substation includes a high-voltage chamber, a low-voltage chamber, and a transformer chamber, in each of which various electric components are arranged, and thus heat dissipation from the inside of each chamber is required. A plurality of heat dissipation fans are arranged on a general box-type transformer substation, and mainly rely on internal and external exchange of air to take away heat generated in the box-type transformer substation and cool the heat. Based on the rapid development of new energy power generation markets, the installed capacity of fans in wind power generation projects is larger and larger, and the capacity of corresponding box-type substations is also larger and larger, and part of problems are also exposed in the long-term use process of the box-type substations with large capacity, such as the heat dissipation problem of transformers in transformer rooms, which is particularly special, and the embodiment is conceived by taking the heat dissipation of dry transformers as the background.

The traditional radiating mode adopts the centrifugal fan that is provided with at the box lower part of transformer room and directly blows against dry-type transformer, the top lateral wall of box is provided with axial fan, but centrifugal fan can directly blow in dry-type transformer's bottom channel-section steel or iron core department when blowing, lead to dry-type transformer body heat dissipation not good, consequently, current dry-type transformer like the grant bulletin number CN216849562U is through all being provided with annular air duct in the bottom in the high-voltage winding outside and the bottom in clearance between the high-low voltage winding, and set up the air cock on annular air duct and accurately blow the heat dissipation and take away the heat to dry-type transformer, and set up the exhaust fan at the top of transformer box, the lateral wall of transformer box is equipped with the air intake, the quick exhaust hot air, further improved radiating efficiency. However, the bottom fan required by the two groups of annular air ducts arranged at the bottom of the coil winding of the dry-type transformer for realizing heat dissipation of the inner side and the outer side of the dry-type transformer has larger power and higher cost.

Therefore, the transformer chamber comprises a box body, a transformer installation structure is arranged in the box body, the heat dissipation between high-low voltage windings in the transformer is the same as that in the prior art, an annular heat dissipation channel is arranged below the transformer in the box body, an air outlet of the annular heat dissipation channel blows air towards a gap between the high-low voltage windings of the transformer, the accurate blowing and heat dissipation of the inside of the transformer body are ensured, an air inlet is arranged below the side wall of the box body, a heat dissipation fan which is used for exhausting outwards is arranged above the box body to quickly suck out heat exhausted from the inside of the transformer body, and a negative pressure area is formed above the box body.

The concrete embodiment of the box-type substation comprises:

The utility model discloses a box-type transformer substation, which is shown in a schematic diagram of the whole structure of the box-type transformer substation in fig. 1, and comprises a high-voltage chamber, a low-voltage chamber and a transformer chamber, wherein the existing dry-type transformer chamber is improved, the transformer chamber comprises a box body 13, a transformer mounting structure is arranged in the box body 13, a transformer is arranged on the transformer mounting structure, the transformer comprises A, B, C three-phase windings which are arranged in parallel and shown in fig. 3, specifically, each phase winding comprises a high-voltage winding 10 and a low-voltage winding 8, a certain gap is reserved between the periphery of the low-voltage winding 8 and the low-voltage winding 8 in a sleeved mode, an annular heat dissipation channel is arranged below the transformer in the box body 13, a blowing opening of the annular heat dissipation channel faces the gap between the high-voltage winding and the low-voltage winding of the transformer, and the transformer body is subjected to accurate heat dissipation to solve the problem that the existing heat dissipation fan directly blows to cause poor heat dissipation of the transformer body.

Through set up the heat dissipation fan in the top position of box 13 can guarantee the accurate suction heat dissipation of annular heat dissipation passageway exhaust hot-blast for the top of box 13 forms negative pressure region, generally in order to realize better heat dissipation, the below of the lateral wall of box 13 generally can be provided with the air intake, in this embodiment, the air intake is shutter 5 specifically, can carry the effective utilization of natural resources in getting into box 13 with outside part cold air delivery, but each heat dissipation fan of box 13 top position is easily upwards sucking away from the lateral wall with the cold air part of getting into from shutter 5, cause the wasting of resources, therefore the key of this embodiment lies in, be provided with towards the inside overhanging interior guide plate 4 of box 13 on the inside wall of box 13, interior guide plate 4 is located between heat dissipation fan and shutter 5, the negative pressure region at the top of entering box 13 after the cold air that will shutter 5 got into to the transformer outside region in box 13, and then be sucked by the heat dissipation fan again, and realize the heat dissipation to the transformer outside.

When considering that the inner baffle 4 can realize better flow guiding effect if being arranged, the cold air entering through the louver 5 is fully utilized and flows to the outer side of the transformer, preferably, the inner baffle 4 is arranged at a position close to but not higher than the top of the high-low voltage winding of the transformer, so that the drainage paths of the cold air entering through the louver 5 pass through the outer side area of the transformer, the maximized heat dissipation effect is realized, and the hot air at the top of the high-low voltage winding is separated from the cold air entering through the louver 5. . Of course, in other embodiments, the inner baffle 4 may be disposed at the level of or slightly higher than the top of the high and low voltage windings of the transformer to achieve the flow guiding effect.

Because the heat dissipation fan at the top of the existing transformer tank is exposed to the outside and possibly damaged during long-time use, in order to ensure that the top of the tank can be rainproof while the heat dissipation effect is good, preferably, as shown in fig. 2, the top cover of the tank 13 comprises an upper top cover 1 and a lower top cover 11, the upper top cover 1 is a rainproof top cover which is shielded above the tank 13, in this embodiment, the upper top cover 1 is of a V-shaped structure with an opening facing downwards, in other words, is of a ridge structure, rainwater flows out to two sides to play a better rainproof effect, and in other embodiments, the upper top cover 1 can also be a flat top cover to ensure that the rainproof effect can be achieved, the heat dissipation fan comprises a top fan 2 which is arranged on the lower top cover 11 and corresponds to the upper side of the transformer mounting structure, and the top fan 2 sucks out heat discharged inside the transformer body rapidly.

Although the top fan 2 has sucked away the heat of transformer exhaust, but the steam can not be diffused to the top both sides in the upward exhaust process, so in order to realize better radiating effect, preferably, be provided with the lateral wall air exit on the lateral wall of box 13, the radiating fan still includes lateral side fan 3 that lateral wall air exit department was disposed, can take away the hot-blast of top fan 2 residual diffusion to the side through lateral side fan 3, and top fan 2 and lateral side fan 3 collocation use the scope of sucking hot-blast is bigger for the radiating effect is better. In this embodiment, the transformer is disposed in the middle of the box 13, and side fans 3 are disposed on both side walls of the box 13, where the side fans 3 are axial fans, so as to ensure a good heat dissipation effect.

In order to ensure that the suction range of the side fan 3 is more effective, preferably, the side fan 3 is disposed at a position close to the top of the side wall of the box 13 and is located below the lower top cover 11, and since the hot air generally flows upwards, the side fan 3 is disposed at a position close to the top of the side wall of the box 13 to effectively suck the hot air diffused to two sides to the maximum extent, so that the heat dissipation dead angle can be sucked. Of course, in other embodiments, when there are a plurality of top fans 2 and a plurality of side fans are disposed near the side wall, the side fans 3 may be disposed at a middle upper position of the side wall of the box 13, which is higher than the inner baffle 4.

In order to ensure better rainproof effect, preferably, the width of the upper top cover 1 on one side of the side fan 3 is larger than that of the lower top cover 11, the upper top cover 1 is provided with a downward flanging, so that the upper rainproof top cover can cover the structure below, the side air outlet 12 between the two layers of top covers is positioned between the flanging and the lower top cover 11, the air outlet of the side air outlet 12 faces downwards, rainwater is not easy to enter, and better rainproof effect is ensured. Of course, in other embodiments, the widths of the upper top cover 1 and the lower top cover 11 are the same, and the gap between the upper top cover 1 and the lower top cover 11 forms the side air outlet 12.

Based on the above embodiment in which the side air outlet 12 is disposed downward, the hot air pumped and discharged by the top fan 2 flows downward along the side wall, so as to avoid the hot air flowing back into the box 13 through the louver 5, so in this embodiment, the side wall of the box 13 is preferably provided with a downward inclined flow guiding inclined plate 14 near the side air outlet 12 for guiding the hot air of the side air outlet 12 to a region far from the side wall of the box 13. The downward-inclined guide inclined plate 14 guides the air of the side exhaust port 12 to the side wall position far away from the box body 13 along the guide inclined plate 14, hot air can not directly flow downwards through the louver 5 and flow back into the box body 13, and specifically, a steel plate net is arranged in the guide inclined plate 14, so that the heat dissipation can be met, and meanwhile, the foreign matters can be effectively prevented from entering the transformer room. Of course, in other embodiments, a horizontal outer baffle may be provided below the side fan 3, or when the exhaust direction of the side exhaust port 12 is toward the side of the case 13, the baffle plate 14 may not be provided.

In the heat exchange process, the heat generally has the characteristic of upward transfer, so that the air inlet is generally arranged at the lower part, the air outlet is arranged at the upper part, and in the embodiment, the right side between A, B and B, C of the dry type transformer is provided with the blower type centrifugal fan 6, the centrifugal fan 6 is fixed on the bottom channel steel of the dry type transformer through the mounting bracket, the air inlet of the centrifugal fan 6 is arranged into the cylindrical air duct 15, the cylindrical air duct 15 can be fixedly connected on the bottom plate of the transformer chamber, and cool air outside the transformer chamber can be directly sucked in through the centrifugal fan 6.

In this embodiment, a square insulation air duct 7 is disposed at the air outlet of the centrifugal fan 6, the square insulation air duct 7 can extend the air outlet to the iron core 9 of the transformer, an annular insulation air duct 16 is disposed at the end of the square insulation air duct 7, the annular insulation air duct 16 forms a reversing heat dissipation channel, a plurality of circular small holes are disposed on the annular insulation air duct 16, each circular small hole corresponds to the gap between the high voltage winding and the low voltage winding of the transformer, and the annular insulation air duct 16 can be fixed on the clamping piece of the iron core 9 through an insulation air duct support 17.

In this embodiment, the inside cooling fan of transformer room all accessible intelligent control ware control, can divide into the multi-batch temperature when the transformer normal operating, and each fan carries out stepwise start and shut down, reaches intelligent control's purpose, can effectually increase the life of fan. The bottom of the transformer room is provided with the steel plate net, so that air with low temperature can enter the transformer room, and small animals and the like can be prevented from entering the electrified rooms in the working environment of the site.

In the radiating process of the box-type transformer substation, as shown in fig. 4, firstly, a centrifugal fan 6 at the bottom of a box body 13 is started, the centrifugal fan 6 pumps external cool air to a square insulating air duct 7 through a cylindrical air duct 15 and then enters an annular insulating air duct 16, round small holes on the annular insulating air duct 16 accurately correspond to gaps between high-voltage windings and low-voltage windings of a transformer to blow, the air is pumped between two layers of top covers through a top fan 2 after passing through the tops of the high-voltage windings and the low-voltage windings, part of hot air at the tops of the high-voltage windings flows to two sides and is pumped to the outer side of the box body 13 through a side fan 3, a shutter 5 below the side wall of the box body 13 brings external cool air into the box body 13, the cool air entering the shutter 5 is guided to the outer side area of the transformer under the action of an inner guide plate 4 so as to ensure the accurate radiating effect of the outer side area of the transformer, and finally, the guide 14 at the top of the box body 13 drains the side air to the area far from the side wall of the box body 13 through the upper radiating fan.

Through the description of the specific embodiment of the box-type transformer substation, the box-type transformer substation can be seen, the interior of the transformer body is precisely blown and radiated through the annular radiating channel, the inner guide plate overhanging towards the interior of the box body is arranged on the inner side wall of the box body, the inner guide plate is positioned between the radiating fan and the air inlet, cold air entering from the air inlet at the position below the side wall of the box body cannot directly flow upwards from the side wall after entering the box body, and is guided to the area outside the transformer by the inner guide plate, so that the heat radiation of the outer side of the transformer is realized, the natural air is reasonably utilized to radiate the outer side of the transformer, the cost is saved, the running power of the bottom fan is reduced, and the energy consumption of the fan is reduced. Through top fan and lateral part fan collocation suction, realize better radiating effect, and the top cap sets up to upper and lower two-layer top cap, and upper top cap carries out rain-proof, and the lateral part air exit between the upper and lower layer top cap is discharged the high temperature gas in the two-layer top cap with the top fan suction, accomplishes outside rain-proof when guaranteeing the good radiating of transformer body, has improved the life of transformer room and has guaranteed the safety of internal device.

The transformer room embodiments of the present utility model are the same as those of the above-described box-type substation, and thus will not be described.

The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a transformer room, includes the box, has transformer mounting structure in the box, still is provided with in the box and is used for setting up in order to wind the annular heat dissipation passageway of blowing towards the clearance between the high-low voltage winding of transformer below the transformer, the below position of the lateral wall of box is provided with the air intake, and characterized by is equipped with the radiator fan of outside convulsions in the upper position of box, is provided with the interior guide plate that stretches out towards the inside overhang of box on the inside wall of box, and interior guide plate is located between radiator fan and the air intake so that the air current that flows from the air intake to the negative pressure district in box top flows through the transformer outside region.

2. The transformer chamber of claim 1, wherein the inner baffle is adapted to be positioned near but not above the top of the high and low voltage windings of the transformer.

3. The transformer room according to claim 1 or 2, wherein the top cover of the tank comprises an upper top cover and a lower top cover, the upper top cover is a rainproof top cover which is covered above the tank, the heat dissipation fan comprises a top fan which is arranged on the lower top cover and corresponds to a position above the transformer installation structure, and a side air outlet for the top fan to suck the high-temperature gas in the two layers of top covers and discharge the high-temperature gas is arranged between the two layers of top covers.

4. The transformer room of claim 3, wherein the side wall of the tank is provided with a side wall air outlet, and the heat dissipation fan further comprises a side fan arranged at the side wall air outlet.

5. The transformer room of claim 4 wherein the side fans are located near the top of the side walls of the tank below the lower top cover.

6. The transformer room of claim 3, wherein the width of the upper top cover at one side of the side fan is larger than that of the lower top cover, a downward flanging is arranged on the upper top cover, and a side air outlet between the two top covers is positioned between the flanging and the lower top cover.

7. The transformer room of claim 6, wherein the side wall of the tank is provided with a downward inclined deflector inclined plate near the side air outlet for guiding the hot air of the side air outlet to a region far from the side wall of the tank.

8. A box-type substation comprising a high-voltage room, a low-voltage room and a transformer room, characterized in that the transformer room is a transformer room as claimed in any one of claims 1-7.