阅读说明：本技术 水上光伏变电站 (Photovoltaic transformer substation on water ) 是由 张俊 孙子元 易梅生 江代君 吴华林 陈浩境 叶志江 于 2019-09-24 设计创作，主要内容包括：本发明涉及一种水上光伏变电站,包括变电站箱体、油浸式变压器、集油装置及排水装置。变电站箱体包括顶板、与顶板相对设置的顶板及连接顶板与底板的侧板。底板、顶板及侧板围设形成收容腔。油浸式变压器及集油装置均收容并安装于收容腔内。集油装置位于油浸式变压器与底板之间。集油装置朝向油浸式变压器的一端设置有集油槽。排水装置设置于变电站箱体的外部。排水装置包括壳体、油水分离器及油污吸附件。壳体具有相对分隔设置且通过安装孔连通的去油腔及集水腔。油水分离器安装于安装孔内。壳体的侧壁开设有与集水腔连通的排水口。油污吸附件收容于去油腔内。去油腔与集油槽连通。故集油装置及排水装置的设置,使得水上光伏变电站较为环保。(The invention relates to a water photovoltaic transformer substation, which comprises a transformer substation box body, an oil-immersed transformer, an oil collecting device and a water draining device. The transformer substation box body comprises a top plate, a top plate and a side plate, wherein the top plate is arranged opposite to the top plate, and the side plate is used for connecting the top plate and a bottom plate. The bottom plate, the top plate and the side plates are surrounded to form an accommodating cavity. The oil-immersed transformer and the oil collecting device are both accommodated and installed in the accommodating cavity. The oil collecting device is positioned between the oil-immersed transformer and the bottom plate. An oil collecting groove is arranged at one end of the oil collecting device facing the oil-immersed transformer. The drainage device is arranged outside the transformer substation box body. The drainage device comprises a shell, an oil-water separator and an oil stain adsorption piece. The shell is provided with an oil removing cavity and a water collecting cavity which are oppositely arranged in a separated mode and communicated through the mounting hole. The oil-water separator is arranged in the mounting hole. The side wall of the shell is provided with a water outlet communicated with the water collecting cavity. The greasy dirt adsorption piece is contained in the degreasing cavity. The oil removing cavity is communicated with the oil collecting groove. Therefore, the arrangement of the oil collecting device and the drainage device ensures that the photovoltaic transformer substation on water is environment-friendly.)

1. An overwater photovoltaic substation, comprising:

the transformer substation box body comprises a top plate, a bottom plate and side plates, wherein the bottom plate is arranged opposite to the top plate, the side plates are used for connecting the top plate and the bottom plate, the top plate and the side plates are surrounded to form an accommodating cavity;

the oil-immersed transformer is accommodated and installed in the accommodating cavity;

the oil collecting device is accommodated and installed in the accommodating cavity, the oil collecting device is positioned between the oil-immersed transformer and the bottom plate, and an oil collecting groove is formed in one end, facing the oil-immersed transformer, of the oil collecting device; and

set up in the outside drainage device of transformer substation box, including casing, oil water separator and greasy dirt adsorption member, the casing has relative separation setting and through the oil pocket and the chamber that catchments that go of mounting hole intercommunication, oil water separator install in the mounting hole, the lateral wall of casing seted up with the outlet that catchments the chamber intercommunication, greasy dirt adsorption member accept in the intracavity that deoils, just go the oil pocket with the oil trap intercommunication.

2. The above-water photovoltaic substation of claim 1, wherein the accommodating cavity is internally provided with a first partition plate and a second partition plate at intervals so as to divide the accommodating cavity into a first cavity, a second cavity and a third cavity, the above-water photovoltaic substation further comprises a high-voltage cabinet and a low-voltage cabinet, and the low-voltage cabinet, the oil-immersed transformer and the high-voltage cabinet are respectively accommodated and installed in the first cavity, the second cavity and the third cavity.

3. The overwater photovoltaic substation of claim 1, wherein the side plate is provided with an opening communicated with the accommodation cavity, the substation box body further comprises a ventilation plate, the ventilation plate is mounted at the edge of the opening and covers at least part of the opening, and the ventilation plate is provided with a plurality of ventilation holes communicated with the accommodation cavity.

4. The above-water photovoltaic substation of claim 3, wherein two openings are respectively provided in two opposite regions of the side plate, and the air-permeable plate is mounted on each of the provided edges.

5. The above-water photovoltaic substation of claim 3 or 4, wherein the air-permeable plate covers a part of the opening, the air-permeable plate is fixedly connected with the bottom plate, and the oil-immersed transformer is mounted at one end of the accommodating cavity close to the bottom plate.

6. The above-water photovoltaic substation of claim 5, wherein the substation box further comprises a rain shield structure mounted to the opening near the edge of the top plate and protruding beyond the outer surface of the gas permeable plate facing away from the receiving cavity.

7. The above-water photovoltaic substation of claim 5, wherein the openings of the air-permeable holes on the outer surface of the air-permeable plate are disposed toward the bottom plate.

8. The overwater photovoltaic transformer substation of claim 1, wherein the inner wall of the oil collecting tank is provided with an oil outlet communicated with the oil removing cavity, the bottom plate is provided with an oil guide hole communicated with the oil outlet, the overwater photovoltaic transformer substation further comprises an oil guide pipe arranged in the oil guide hole in a penetrating manner, one end of the oil guide pipe is arranged in the oil outlet in a penetrating manner, and the other end of the oil guide pipe extends into the oil removing cavity.

9. The above-water photovoltaic substation of claim 1, wherein the oil collecting device and the drainage device are spaced apart in a direction in which the top plate points toward the bottom plate.

10. The above-water photovoltaic substation of claim 1, wherein the housing is a concrete structure.

Technical Field

The invention relates to the technical field of new energy waterborne photovoltaic power generation, in particular to a waterborne photovoltaic transformer substation.

Background

As a new power generation mode, photovoltaic power generation is generally applied to areas with rich illumination resources, which generally includes mountain region photovoltaics, coal mining subsidence area photovoltaics, pond photovoltaics (fishing light complementation), water photovoltaics, farmland photovoltaics (agricultural light complementation) and other land photovoltaics.

The booster box transformer adopted by domestic overwater photovoltaic is generally a combined transformer and a small-capacity European transformer (a pre-installed substation), wherein the most common transformer is an oil-immersed transformer.

However, oil leakage and the like occur in the oil immersed transformer during use due to various reasons, and the oil leaked from the oil immersed transformer in the photovoltaic system on water is likely to fall into the water, so that water pollution, particularly pollution of a fishpond, a drinking reservoir and the like, is caused. So the environmental protection performance of the traditional photovoltaic on water is not high.

Disclosure of Invention

Based on this, it is necessary to provide a photovoltaic transformer substation on water of comparatively environmental protection to the great problem of pollution of traditional large capacity photovoltaic transformer on water.

An above-water photovoltaic substation comprising:

the transformer substation box body comprises a top plate, a bottom plate and side plates, wherein the bottom plate is arranged opposite to the top plate, the side plates are used for connecting the top plate and the bottom plate, the top plate and the side plates are surrounded to form an accommodating cavity;

the oil-immersed transformer is accommodated and installed in the accommodating cavity;

the oil collecting device is accommodated and installed in the accommodating cavity, the oil collecting device is positioned between the oil-immersed transformer and the bottom plate, and an oil collecting groove is formed in one end, facing the oil-immersed transformer, of the oil collecting device; and

set up in the outside drainage device of transformer substation box, including casing, oil water separator and greasy dirt adsorption member, the casing has relative separation setting and through the oil pocket and the chamber that catchments that go of mounting hole intercommunication, oil water separator install in the mounting hole, the lateral wall of casing seted up with the outlet that catchments the chamber intercommunication, greasy dirt adsorption member accept in the intracavity that deoils, just go the oil pocket with the oil trap intercommunication.

In one embodiment, a first partition plate and a second partition plate are arranged in the accommodating cavity at intervals so as to divide the accommodating cavity into a first cavity, a second cavity and a third cavity, the above-water photovoltaic transformer substation further comprises a high-voltage cabinet and a low-voltage cabinet, and the low-voltage cabinet, the oil-immersed transformer and the high-voltage cabinet are respectively accommodated and installed in the first cavity, the second cavity and the third cavity.

In one embodiment, the side plate is provided with an opening communicated with the accommodating cavity, the substation box body further comprises a ventilation plate, the ventilation plate is mounted at the edge of the opening and covers at least part of the opening, and the ventilation plate is provided with a plurality of ventilation holes communicated with the accommodating cavity.

In one embodiment, two opposite areas of the side plate are respectively provided with two openings, and the edge of each opening is provided with the ventilation plate.

In one embodiment, the air-permeable plate covers part of the opening, the air-permeable plate is fixedly connected with the bottom plate, and the oil-immersed transformer is installed at one end of the accommodating cavity close to the bottom plate.

In one embodiment, the substation box body further comprises a rain shielding structure, and the rain shielding structure is installed at the edge of the opening close to the top plate and protrudes out of the outer surface of the ventilation plate, which faces away from the accommodating cavity.

In one embodiment, the vent holes are positioned on the outer surface of the vent plate, and the openings of the vent holes are arranged towards the bottom plate.

In one embodiment, the inner wall of the oil collecting tank is provided with an oil outlet communicated with the oil removing cavity, the bottom plate is provided with an oil guide hole communicated with the oil outlet, the photovoltaic transformer station on water further comprises an oil guide pipe arranged in the oil guide hole in a penetrating manner, one end of the oil guide pipe is arranged in the oil outlet in a penetrating manner, and the other end of the oil guide pipe extends into the oil removing cavity.

In one embodiment, the oil collecting device and the water draining device are arranged at intervals along the direction of the top plate pointing to the bottom plate.

In one embodiment, the housing is a concrete structure.

According to the above overwater photovoltaic transformer station, the oil collecting device can collect the insulating oil leaked from the oil immersed transformer and the water entering the box body of the transformer station from the outside into the oil collecting tank to form an oil-water mixture; then the oil-water mixture in the oil collecting tank can flow into the oil removing cavity, and the oil-water mixture is subjected to primary oil removal through the oil stain adsorption piece in the oil removing cavity, so that part of insulating oil in the oil-water mixture is adsorbed on the oil stain adsorption piece; the oil-water mixture subjected to primary deoiling flows into an oil-water separator to be subjected to secondary deoiling, so that water meeting the emission standard is obtained; the water meeting the discharge standard can flow into the water collecting cavity and be discharged through the water outlet. From this, above-mentioned oil collecting device and drainage device, to the seepage to the box of transformer substation oil-water mixture collect, first deoiling, secondary remove oily processing step back, obtain the water that accords with emission standard and a small amount of greasy dirt that adsorbs on greasy dirt adsorption element, even these water that accord with emission standard directly discharge to the environment around the photovoltaic transformer substation on water, can not cause the pollution to the environment on every side yet, so photovoltaic transformer substation on water is comparatively environmental protection.

Drawings

Fig. 1 is a front view of an above-water photovoltaic substation in a preferred embodiment of the present invention;

fig. 2 is a top view of the above-water photovoltaic substation shown in fig. 1;

FIG. 3 is a front view of a substation box in the above-water photovoltaic substation shown in FIG. 1;

FIG. 4 is a top view of the substation enclosure shown in FIG. 3;

FIG. 5 is a side view of the substation enclosure of FIG. 3;

fig. 6 is a top view of an oil catcher in the waterborne photovoltaic substation shown in fig. 1;

fig. 7 is a schematic structural view of a drainage device in the above-water photovoltaic substation shown in fig. 1;

FIG. 8 is a schematic structural view of a gas permeable plate in the substation box shown in FIG. 3;

fig. 9 is an enlarged view of a portion of the substation box shown in fig. 4.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, an above-water photovoltaic substation 10 according to a preferred embodiment of the present invention includes a substation box 100, an oil-immersed transformer 200, an oil collecting device 300, and a drainage device 400. Wherein, the photovoltaic transformer substation 10 on water can be built on fishponds, drinking reservoirs or lakes and the like.

Referring to fig. 3 to 5, the substation box 100 includes a top plate 110, a bottom plate 120 disposed opposite to the top plate 110, and a side plate 130 connecting the top plate 110 and the bottom plate 120. The top plate 110, the bottom plate 120 and the side plate 130 are surrounded to form a containing cavity 140. The substation box 100 is a hollow structure and mainly plays a role in supporting and connecting. The arrangement of the substation box 100 enables the photovoltaic substation 10 on water to form a pre-assembled structure.

When the above-water photovoltaic substation 10 is located in the horizontal plane, the top plate 110 is located at the top of the substation box 100, and the bottom plate 120 is located at the bottom of the substation box 100.

The oil-immersed transformer 200 is received and mounted in the receiving cavity 140. The oil-filled transformer 200 has a large amount of insulating oil therein, and leakage of the insulating oil inevitably occurs after a period of use. And the insulating oil is difficult to clean after leakage and has great pollution to the environment.

Photovoltaic transformer substation 10 on water still includes low-voltage board 500 and high-voltage board 600. The low-voltage cabinet 500 and the high-voltage cabinet 600 are accommodated and installed in the accommodating cavity 140.

Referring to fig. 6, the oil collecting device 300 is accommodated and installed in the accommodating cavity 140. The oil collecting device 300 is located between the oil-immersed transformer 200 and the bottom plate 120. The oil collecting device 300 is provided with an oil collecting tank 310 at one end facing the oil-immersed transformer 200. The oil sump 310 is used to collect the oil-water mixture formed by the leaked insulation oil of the oil-immersed transformer 200 and the water entering the substation box 100, and the oil-water mixture is formed in the oil sump 310.

After photovoltaic transformer substation 10 on water used for a long time, inevitably can appear the condition that oil-immersed transformer 200 leaks oil and external water gets into in the transformer substation box 100, because photovoltaic transformer substation 10 on water is built on the surface of water, the insulating oil of oil-immersed transformer 200 seepage drops to the aquatic very easily, can cause serious pollution to quality of water. The oil collecting device 300 can collect the insulating oil leaked from the oil-immersed transformer 200 and the water entering the transformer substation box 100 into the oil collecting tank 310 to form an oil-water mixture, so that the oil-water mixture is prevented from flowing freely on the transformer substation box 100 and even flowing into the water below the overwater photovoltaic transformer substation 10, and the probability of pollution to the environment around the transformer substation box 100 and the overwater photovoltaic transformer substation 10 is reduced.

Referring to fig. 1 and fig. 3 again, in the present embodiment, the oil-immersed transformer 200 is aligned with the oil sump 310. When the above-water photovoltaic substation 10 is located in a horizontal plane, the oil sump 310 is located directly below the oil-immersed transformer 200. In practical use, the leaked insulating oil of the oil-immersed transformer 200 can directly fall into the oil collecting tank 310 under the action of the self gravity, so that an oil guide structure is omitted, the structure of the overwater photovoltaic transformer station 10 is simplified, the probability of secondary oil leakage in the process that the insulating oil is guided to the oil collecting tank 310 from the oil-immersed transformer 200 is reduced, and the reliability of the overwater photovoltaic transformer station 10 is greatly improved.

Referring to fig. 7, the drainage device 400 is disposed outside the substation box 100. The drainage device 400 may be provided at a distance from the substation box 100, or may be directly installed at the bottom of the substation box 100. The drainage apparatus 400 includes a housing 410, an oil-water separator 420, and an oil dirt adsorption member 430. Wherein, the oil-water separator 420 is a device for removing insulating oil in an oil-water mixture by using a chemical reagent; the oil dirt adsorbing member 430 may adsorb oil dirt in the oil-water mixture onto the oil dirt adsorbing member 430, and thus the oil dirt adsorbing member 430 may be cobblestones, activated carbon, or the like.

The housing 410 has a degreasing chamber 411 and a water collecting chamber 412 which are spaced apart from each other and communicate with each other through a mounting hole 413. The oil-removing chamber 411 communicates with the oil sump 310. The oil-water mixture collected in the oil collecting tank 310 can directly flow into the oil removing chamber 310. The oil stain adsorption member 430 is accommodated in the oil removing chamber 411. Wherein, the deoiling chamber 411 is a place for performing primary deoiling (i.e. physical deoiling) on the oil-water mixture; the water collection chamber 412 is a place where water obtained by treating the oil-water mixture is collected.

The oil-water separator 420 is installed in the installation hole 413, and is used for performing secondary oil removal (i.e., chemical oil removal) on the oil-water mixture. Therefore, after the oil-water separator 420 is used for secondary deoiling, water meeting the discharge standards can be obtained, and the water can directly flow into the water collecting cavity 412.

The side wall of the housing 410 is opened with a water discharge port 414 communicating with the water collecting chamber 412. As such, water collected within the water collection chamber 412 that meets the discharge standards may be discharged directly into the surrounding environment, such as a reservoir, pond, etc. below the above-water photovoltaic substation 10.

In the present embodiment, the housing 410 is a concrete structure. The concrete structure has the characteristics of good integrity, durability, fire resistance, corrosion resistance and the like. The integrity is good, and the shell 410 can be poured into a whole, so as to reduce the probability of leakage of the oil removing cavity 411 and the water collecting cavity 412. The concrete structure has good durability, fire resistance and corrosion resistance, the probability that the shell 410 is corroded and damaged by oil, water and other substances in the oil-water mixture can be greatly reduced, the service life of the shell 410 is effectively prolonged, and therefore the service lives of the drainage device 400 and the overwater photovoltaic transformer substation 10 are also longer.

Referring to fig. 1 and 3 again, in the present embodiment, the oil collecting device 300 and the water discharging device 400 are disposed at intervals along the direction from the top plate 110 to the bottom plate 120. When the above-water photovoltaic substation 10 is located in the horizontal plane, the direction in which the top plate 110 points to the bottom plate 120 is the gravity direction, so the drainage device 400 is located right below the oil collecting device 300. During the in-service use, the oil-water mixture that collects in the oil catch bowl 310 can directly drop to deoiling chamber 411 under its own action of gravity, has not only saved the process that utilizes other power unit (for example pump etc.) to carry the oil-water mixture in the oil catch bowl 310 to deoiling chamber 411, has simplified the structure of photovoltaic transformer substation 10 on water, has reduced the volume, and it is more smooth and easy to make the process that the oil-water mixture flows to deoiling chamber 411 in the oil catch bowl 310, makes the use of photovoltaic transformer substation 10 on water more convenient.

Referring to fig. 1, 3 and 6, in the present embodiment, the oil outlet 320 is formed on the inner wall of the oil collecting tank 310 and communicated with the oil removing cavity 411, and the oil guiding hole 121 is formed on the bottom plate 120 and communicated with the oil outlet 320. The oil leakage preventing system 300 further includes an oil guiding pipe (not shown) passing through the oil guiding hole 121. One end of the oil conduit is inserted and installed in the oil outlet 320, and the other end of the oil conduit extends into the oil removing cavity 411.

Therefore, the oil-water mixture collected in the oil collecting tank 310 can be directly led out to the oil removing cavity 411 through the oil guide pipe. Therefore, the oil pipe may be used to allow the drainage device 400 to be disposed at any position outside the substation box 100, as long as the oil-water mixture in the oil collecting tank 310 flows into the oil removing cavity 411. Therefore, the oil guide pipe is arranged, so that the installation of the oil leakage prevention system 300 is simpler, and the process of conveying the oil-water mixture in the oil collecting tank 310 into the oil removing cavity 411 is smoother.

Further, in this embodiment, an oil outlet valve (not shown) is disposed on the oil conduit. By opening and closing the oil outlet valve, the oil collecting tank 310 and the oil removing cavity 411 can be communicated or blocked.

In actual use, even if the oil-filled transformer 200 leaks, less insulating oil will leak at the same time unless special conditions (for example, weather in which the oil tank of the oil-filled transformer 200 is damaged seriously or storm is met), and less water will enter the tank body 110 at the same time due to the waterproof structure of the substation tank 100.

For convenience of management, the outlet valve may be closed at ordinary times so that the oil-water mixture is accumulated in the oil sump 310. When the oil-water mixture in the oil collecting tank 310 reaches a certain amount, the oil outlet valve can be opened to allow the oil-water mixture in the oil collecting cavity to flow into the oil removing cavity 411. Or the oil outlet valve can be opened and closed at regular time. Therefore, the arrangement of the oil outlet valve enables the use of the photovoltaic transformer substation 10 on water to be more convenient.

Referring again to fig. 7, in the present embodiment, a drain valve 440 is installed in the drain port 414. By opening and closing the drain valve 440, the drain port 414 is opened or closed, thereby allowing water that meets the drain criteria to drain from the water collection chamber 412 or accumulate within the water collection chamber 412. For ease of management, the drain valve may be closed at times such that water meeting drain standards accumulates within the water collection chamber 412. When a certain amount of water within the water collection chamber 412 meets the discharge standard, the drain valve 440 may be opened to allow the water within the water collection chamber 412 to drain to the surrounding environment. Or may also time the opening and closing of the drain valve 440. Therefore, the arrangement of the drain valve 440 makes the use of the above-water photovoltaic transformer station 10 more convenient.

The working process of the oil collecting device 300 and the water discharging device 400 is as follows:

(1) during the use of the above-water photovoltaic transformer station 10, the oil collecting device 300 can collect the insulating oil leaked from the oil-immersed transformer 200 and the water entering the transformer station box 100 from the outside into the oil collecting tank 310 to form an oil-water mixture;

(2) the oil-water mixture in the oil collecting tank 310 flows into the oil removing chamber 411, and part of the oil in the oil-water mixture is adsorbed onto the oil-stain adsorbing member 430 (such as cobblestones, etc.), so as to achieve the purpose of removing oil from the oil-water mixture for the first time (i.e. physically removing oil);

(3) the oil-water mixture after the primary oil removal flows to an oil-water separator 420 to perform secondary oil removal (i.e. chemical oil removal) on the oil-water mixture after the primary oil removal, so as to obtain water meeting the emission standard;

(4) the water obtained after the second oil removal flows directly into the water collection chamber 412 and is discharged through the water discharge port 414.

Therefore, the oil collecting device 300 and the drainage device 400 are disposed to collect the oil-water mixture leaked into the substation box 100, remove oil for the first time, and remove oil for the second time, so as to obtain water meeting the discharge standard and a small amount of oil stain adsorbed on the oil stain adsorbing member 430, and even if the water meeting the discharge standard is directly discharged to the surrounding environment (for example, a fishpond and an application reservoir below the photovoltaic substation 10 above the water), the surrounding environment is not polluted, so that the photovoltaic substation 10 above the water is more environment-friendly.

Referring to fig. 3 again, in the present embodiment, the side plate 120 is provided with an opening 131 communicating with the accommodating cavity 140. The substation box 100 further comprises gas permeable plates 150. The ventilation plate 150 is mounted to an edge of the opening 131 and covers at least a portion of the opening 131. The ventilation plate 150 may be a louver plate, a mesh plate, or the like. When the oil-immersed transformer 200 works, a large amount of heat is generated, and if the heat is accumulated in the accommodating cavity 140, the usability and the service life of the oil-immersed transformer 200 are affected.

Specifically, the positional relationship between the ventilation plate 150 and the opening 131 includes the following two cases: in the first case, the air-permeable plate 150 completely covers the opening 131, and the height of the air-permeable plate 150 is the same as that of the opening 131; in the second case, the ventilation plate 150 only covers part of the opening 131, and at this time, the height of the ventilation plate 150 is smaller than the height of the opening 131, and the part of the opening 131 that is not covered by the ventilation plate 150 forms an open cavity structure in the receiving cavity 140, so that heat generated by the oil-immersed transformer 200 in the receiving cavity 140 during operation can be dissipated to the outside of the substation box 100 through the part of the opening 131 that is not covered, thereby effectively reducing the probability of a large amount of heat being accumulated in the receiving cavity 140.

Referring to fig. 8, the ventilation plate 150 is provided with a plurality of ventilation holes 151 communicating with the accommodating cavity 140. Therefore, when the oil-filled transformer 200 located in the receiving cavity 140 operates to generate a large amount of heat, even if the ventilation plate 150 completely covers the opening 131, the heat can be transferred to the outside of the substation box 100 through the ventilation holes 151, and the probability of accumulation of a large amount of heat inside the receiving cavity 140 is further reduced. Therefore, the ventilation plate 150 is arranged, so that the heat dissipation effect of the transformer substation box body 100 is better, and the reliability of the overwater photovoltaic transformer substation 10 is higher.

In the present embodiment, the openings of the ventilation holes 151 located at the outer surface of the ventilation plate 150 are disposed toward the base plate 120. When the photovoltaic transformer substation 10 on water is located on the horizontal plane, the opening of the air vent 151 located on the outer surface of the air permeable plate 150 is arranged downwards, so that even if water falls on the outer surface of the air permeable plate 150, the water is not easy to enter the transformer substation box body 100 through the air vent 151, the probability that the water falling on the outer surface of the air permeable plate 150 enters the accommodating cavity 140 through the air vent 151 is greatly reduced, and the waterproof performance of the transformer substation box body 100 and the photovoltaic transformer substation 10 on water is effectively improved.

Referring to fig. 3 and 4 again, in the present embodiment, two openings 131 are respectively formed in two opposite regions of the side plate 130. The edge of each opening 131 is mounted with a gas permeation plate 150, respectively. Thus, the two openings 131 are respectively located at two opposite sides of the accommodating cavity 140. At least two air-permeable plates 150 are respectively installed at edges of the two openings 131. Therefore, the external gas can form convection through the two opposite openings 131 in the accommodating cavity 140, so that the dissipation speed of heat in the accommodating cavity 140 is faster, the heat dissipation effect of the transformer substation box body 100 is further improved, and the reliability of the photovoltaic transformer substation 10 on water is further improved.

Referring to fig. 3 again, in the present embodiment, the ventilation plate 150 covers a part of the opening 131. The ventilation plate 150 is fixedly connected with the bottom plate 120. When the above-water photovoltaic substation 10 is placed on a horizontal plane, the height of the air-permeable plate 150 is smaller than the height of the opening. Therefore, the partial opening 131 close to the top plate 110 is not covered by the ventilation plate 150, so that the accommodation cavity 140 has an open cavity structure, and partial heat in the accommodation cavity 140 can be dissipated through the partial opening 131 not covered by the ventilation plate 150, thereby further improving the heat dissipation speed in the accommodation cavity 140, further improving the heat dissipation efficiency of the substation box 100, and further improving the reliability of the photovoltaic substation 10 on water.

The oil-immersed transformer 200 is installed at one end of the receiving cavity 140 close to the bottom plate 120. Thus, the oil-filled transformer 200 is located at the bottom of the receiving cavity 140. Furthermore, since the air-permeable plate 150 is fixedly connected to the bottom plate 120, the air-permeable plate 150 covers the lower half portion of the opening 131, so that the air-permeable plate 150 can protect the oil-filled transformer 200 to reduce damage to the oil-filled transformer 200 caused by external impurities, water, and the like.

Referring to fig. 3 and 5 again, in the present embodiment, the substation box 100 further includes a rain shielding structure 160. A rain shield structure 160 is mounted to the opening 131 near the edge of the roof 120. The rain blocking structure 160 protrudes from the outer surface of the ventilation plate 150 facing away from the receiving cavity 140. The rain shielding structure 160 may be a rain shed structure, or a strip-shaped plate structure fixed to the outer surface of the box body 110. The rain shield structure 160 is fixedly connected to the edge of the opening 131 close to the top plate 110, and may be movably connected to the edge of the opening 131 close to the top plate 110.

When the above-water photovoltaic substation 10 is located in the horizontal plane, the dimension of the rain shielding structure 160 in the horizontal direction on the vertical plane is greater than or equal to the dimension of the opening 131 in the horizontal direction on the vertical plane. From this, rain-proof structure 160 can play the effect of sheltering from to opening 131 and set up the ventilative board 150 on opening 131, if meet the condition that rainy weather or fall into water in a large number, rain-proof structure 160 can reduce the probability that external water gets into in transformer substation box 100 through ventilative hole 151 of ventilative board 150 or opening 131 department that the upper half was not covered by ventilative board 150, has improved transformer substation box 100's waterproof performance greatly, has further improved the reliability of photovoltaic transformer substation 10 on water.

Specifically, the rain shielding structure 160 is a plate-shaped structure inclined with respect to the side plates 130 in a direction toward the bottom plate 120, so as to reduce the probability of water accumulation on the upper surface of the rain shielding structure 160, and further improve the waterproof performance of the substation box 100.

Referring to fig. 3 and 4 again, in the present embodiment, a first partition plate 170 and a second partition plate 180 are disposed in the accommodating cavity 140 to divide the accommodating cavity 140 into a first chamber 141, a second chamber 142 and a third chamber 143. Specifically, the first chamber 141 and the third chamber 143 are respectively located at two sides of the second chamber 142. Photovoltaic transformer substation 10 on water still includes high-voltage board 600 and low-voltage board 500. The low-voltage cabinet 500, the oil-immersed transformer 200, and the high-voltage cabinet 600 are respectively housed and installed in the first chamber 141, the second chamber 142, and the third chamber 143.

From this, install low-voltage cabinet 500, oil-immersed transformer 200 and high-voltage board 600 respectively in first cavity 141, second cavity 142 and third cavity 143, can make low-voltage cabinet 500, oil-immersed transformer 200 and high-voltage board 600 have solitary working space respectively, be favorable to operating personnel to carry out operation and maintenance to low-voltage cabinet 500, oil-immersed transformer 200 and high-voltage board 600 alone for photovoltaic transformer substation 10's on water operation is simpler. Moreover, the accommodating cavity 140 is divided into the first, second and third cavities 141, 142 and 143, so that the arrangement of the parts in the above-water photovoltaic substation 10 is more orderly.

Specifically, the opening 131 communicates with the second chamber 142. Heat generated by the operation of the oil-filled transformer 200 in the second chamber 142 can be dissipated through the opening 131.

Furthermore, in the present embodiment, the above-water photovoltaic substation 10 further includes a lighting device 700 disposed in the first chamber 141 and the third chamber 143. Compared with the second chamber 142, the first chamber 141 and the third chamber 143 are relatively closed chamber structures, so the light in the first chamber 141 and the third chamber 143 is dark, especially when the weather is rainy or at night, the light in the first chamber 141 and the third chamber 143 is dark, and in order to have a working environment with good light, an operator needs to hold a lighting tool (such as a flashlight) to work, which is very inconvenient. Therefore, the lighting device 700 is arranged, and an operator only needs to turn on the lighting device 700, so that a better light working environment can be obtained in the first chamber 141 and the third chamber 143, and the photovoltaic transformer substation 10 on water is more convenient to use.

Referring to fig. 9, in the present embodiment, the side plate 130 includes an outer plate 132, a heat insulation plate 133 and an inner plate 134, which are sequentially stacked. The inner plate 134 is located on a side of the heat insulation plate 133 facing the receiving cavity 140, and the outer plate 132 is located on a side of the heat insulation plate 133 facing away from the receiving cavity 140. The heat insulation board 133 mainly plays a role of heat insulation and preservation, and is generally made of materials with good heat insulation and preservation performance, such as heat insulation rock wool, glass wool, expanded pearl edge, and the like.

Thus, the arrangement of the insulation board 133 effectively improves the insulation performance of the side panel 130. If the outside air temperature is too high, the high temperature around the substation box 100 is transferred to the first chamber 141 and the third chamber 143 through the side plate 130, thereby affecting the operation and the service life of the electronic devices in the first chamber 141 and the third chamber 143. Therefore, the side plate 130 is provided with the outer plate 132, the thermal insulation plate 133 and the inner plate 134 which are sequentially stacked, so that the probability that high temperature in the surrounding environment of the transformer substation box body 100 is transmitted into the first cavity 141 and the third cavity 143 through the side plate 130 can be greatly reduced, the first cavity 141 and the third cavity 143 are guaranteed to have stable working temperature, and the reliability of the overwater photovoltaic transformer substation 10 is further improved.

Further, in the present embodiment, the outer layer board 132 is corrugated board. The corrugated board is a contour plate and has the characteristics of light weight, high strength and the like. Therefore, the outer plate 132 is corrugated, so that the side plate 130 has the advantages of light weight, high strength, and the like. And the weight is light, so that the transformer substation box body 100 is lighter and lighter, the strength is higher, the transformer substation box body 100 has higher strength, and the service life of the transformer substation box body 100 can be effectively prolonged.

Referring to fig. 3 to 5 again, in the present embodiment, the ventilation plate 150 is provided with a first door opening 152 communicating with the second chamber 142. The substation box 100 further comprises a transformer door 190 mounted within the first door opening 152. Wherein, the transformer door 190 can be a net plate or a louver plate, etc.

The side plate 130 is further opened with a second door opening 135 communicated with the third chamber 143 and a third door opening 136 communicated with the first chamber 141. The substation box 100 further comprises a high-voltage door 201 mounted in the second door opening 135 and a low-voltage door 202 mounted in the third door opening 136.

Therefore, in the actual use process of the above-water photovoltaic substation 10, an operator needs to enter the first chamber 141, the second chamber 142, and the third chamber 143 for operation and maintenance, and at this time, the operator only needs to open the high-pressure door 201, the low-pressure door 202, or the transformer door 190 to enter the first chamber 141, the second chamber 142, or the third chamber 143. Therefore, the arrangement of the high-voltage door 201, the low-voltage door 202 and the transformer door 190 makes the use of the above-water photovoltaic transformer substation 10 more convenient.

Further, in the present embodiment, the low pressure door 202 is provided with a louver 2021. Since the low-voltage cabinet 500 generates little heat during operation, the louver 2021 disposed on the low-voltage door 202 can satisfy the heat dissipation requirement of the first chamber 141. Therefore, the louver 2021 is disposed to rapidly dissipate heat in the first chamber 141, thereby further improving the heat dissipation effect of the substation box 100.

Further, in the present embodiment, the high-voltage board 600 is a gas-filled board. The inflatable cabinet serving as a new-generation switch device has the characteristics of compact structure, flexible operation, reliable interlocking and the like, so that the high-voltage cabinet 600 is set as the inflatable cabinet, the volume of the high-voltage cabinet 600 is effectively reduced, and the volume of the overwater photovoltaic transformer substation 10 is reduced.

Referring to fig. 2 again, in the present embodiment, the low-voltage cabinet 500 includes a first low-voltage cabinet 510, a second low-voltage cabinet 520 and a communication control cabinet 530. The first low-voltage cabinet 510, the second low-voltage cabinet 520 and the communication control cabinet 530 form a two-in-one arrangement in a direction in which the first chamber 141 points to the second chamber 142. Specifically, the first low-voltage cabinet 510 and the second low-voltage cabinet 520 are both located at one end of the first chamber 141 close to the second chamber 142; the communication control cabinet 530 is located at an end of the first chamber 141 away from the second chamber 142. Therefore, the first low-voltage cabinet 510, the second low-voltage cabinet 520 and the communication control cabinet 530 are arranged in a two-in-one arrangement mode, and compared with the mode that the first low-voltage cabinet 510, the second low-voltage cabinet 520 and the communication control cabinet 530 are sequentially arranged in a one-in-one shape in the prior art, the size of the transformer substation box body 100 is greatly reduced, and the size of the overwater photovoltaic transformer substation 10 is further reduced.

Referring to fig. 4 again, in the present embodiment, the top plate 110 is provided with a viewing window 111 communicating with the accommodating cavity 140. The viewing window 111 may be a window that can be opened and closed, or may be a transparent plate having a good light transmission property. In the actual use process, the condition in the second chamber 142, especially the condition of collecting the oil-water mixture in the oil collecting tank 310 of the oil collecting device 300 and the condition of accumulating the oil-water mixture can be observed through the observation window 111, so that an operator can conveniently control the communication and the separation between the oil collecting tank 310 and the oil removing cavity 411, and the convenience in use of the large-capacity waterborne photovoltaic transformer substation 10 is further improved.

In the above-mentioned above-water photovoltaic substation 10, the oil collecting device 300 can collect the insulating oil leaked from the oil-immersed transformer 200 and the water entering the substation box 100 from the outside into the oil collecting tank 310 to form an oil-water mixture; then the oil-water mixture in the oil collecting tank 310 can flow into the oil removing cavity 411, and the oil-water mixture is subjected to primary oil removal through the oil stain adsorbing member 430 in the oil removing cavity 411, so that part of insulating oil in the oil-water mixture is adsorbed onto the oil stain adsorbing member 430; the primarily deoiled oil-water mixture flows to an oil-water separator 420 to secondarily deoil the primarily deoiled oil-water mixture, thereby obtaining water meeting the emission standard; this water meeting the discharge criteria can flow into the water collection chamber 412 and be discharged through the water discharge port 414. Therefore, the oil collecting device 300 and the drainage device 400 can collect the oil-water mixture leaked into the substation box 100, remove oil for the first time, remove oil for the second time, and obtain water meeting the discharge standard and a small amount of oil stains adsorbed on the oil stain adsorption member 430, and even if the water meeting the discharge standard is directly discharged to the environment around the photovoltaic substation 10 on water, the environment on water is not polluted, so that the photovoltaic substation 10 on water is more environment-friendly.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.