CN117996619A - Marine photovoltaic box-type substation - Google Patents

Abstract

The invention relates to the field of power transformation equipment, in particular to a box-type substation for offshore photovoltaic. This box-type substation for marine photovoltaic includes: the box body is internally provided with a box transformer chamber, a high-pressure chamber and a low-pressure chamber, wherein the high-pressure chamber and the low-pressure chamber are arranged in a sealing way, and temperature and humidity regulating air conditioners are respectively arranged in the high-pressure chamber and the low-pressure chamber; a transformer arranged in the box transformer chamber; a high-voltage plenum chamber disposed within the high-voltage chamber and connected to the transformer; a low-voltage cabinet disposed in the low-voltage chamber and connected with the transformer; the outer surface of the box body is sequentially provided with a hot dip zinc layer and a fluorocarbon paint layer. According to the box-type transformer substation for the offshore photovoltaic, the surface of the box body is subjected to hot dip galvanizing and fluorocarbon paint spraying treatment, so that the corrosion resistance of the surface of the box body is enhanced, the box body is prevented from being corroded and damaged, and the service life of the box-type transformer substation is prolonged.

Description

Marine photovoltaic box-type substation

Technical Field

The invention relates to the field of power transformation equipment, in particular to a box-type substation for offshore photovoltaic.

Background

The box-type transformer substation, namely the preassembled transformer substation, is widely applied to the fields of new energy power generation, national grid power distribution and the like. In the actual use process, the high-voltage switch, the transformer and the low-voltage switch are transported to the site for direct use after being installed and debugged in the shell of the box-type transformer substation, and the method is particularly suitable for the field of new energy power generation. With the shortage of land and the rising of cost of photovoltaic on land, coastal cities are gradually exploring new scenes of development of offshore photovoltaic, and an offshore photovoltaic box-type transformer station is an indispensable component part in an offshore solar photovoltaic power generation system.

The existing offshore box-type transformer substation generally comprises a box body, a transformer, a low-voltage switch cabinet and a high-voltage switch cabinet, wherein the box body is composed of stainless steel composite color steel plates, a supporting platform is fixed at the bottom of the box body, a cooling oil tank is arranged inside the supporting platform, a heat absorption oil pipe is fixed on the inner wall of the box body, a heat dissipation oil pipe is fixed on the outer surface of the box body, a heat dissipation oil pipe 8 is a fin pipe for improving heat dissipation rate, an oil pump is arranged on the upper surface of the supporting platform, an oil inlet of the oil pump is communicated with the cooling oil tank through a pipeline, an oil outlet of the oil pump is communicated with the heat dissipation oil pipe outside the box body through a pipeline, the supporting platform and supporting legs are composed of an inner metal framework and MEC marine cement, corrosion-resistant conditions of an all-metal supporting seat are avoided, and cost is reduced. However, in the practical use process, the ocean has special environments of high salt fog, high ultraviolet, high humidity and heat and the like, so that the corrosion and damage of the box body of the transformer substation are extremely easy to cause, and the service life of the transformer substation is influenced.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

Disclosure of Invention

The invention provides a box-type transformer substation for offshore photovoltaic, which aims to solve or solve the technical problem that the existing transformer substation is difficult to deal with special environments such as ocean high salt fog, high ultraviolet, high humidity and heat and the like and is extremely easy to cause corrosion damage of a transformer substation box body. The substation comprises: the box body is internally provided with a box transformer chamber, a high-pressure chamber and a low-pressure chamber, wherein the high-pressure chamber and the low-pressure chamber are arranged in a sealing way, and temperature and humidity regulating air conditioners are respectively arranged in the high-pressure chamber and the low-pressure chamber; a transformer arranged in the box transformer chamber; a high-voltage plenum chamber disposed within the high-voltage chamber and connected to the transformer; a low-voltage cabinet disposed in the low-voltage chamber and connected with the transformer; the outer surface of the box body is sequentially provided with a hot dip zinc layer and a fluorocarbon paint layer.

The invention discloses a box-type substation for offshore photovoltaic, which comprises a box body, a transformer, a high-voltage air charging cabinet and a low-voltage cabinet. The box body is provided with a box transformer room, a high-pressure room and a low-pressure room, the high-pressure room and the low-pressure room are arranged in a sealing mode, and temperature and humidity adjusting air conditioners are arranged in the high-pressure room and the low-pressure room and used for adjusting the temperature and humidity of the high-pressure room and the low-pressure room and coping with the ocean high-humidity and heat environment, so that the normal operation of the high-pressure air charging cabinet and the low-pressure cabinet is facilitated. The hot dip zinc layer can increase the corrosion resistance of the surface of the box body. The fluorocarbon paint has better weather resistance, heat resistance, chemical resistance and the like, and can further increase the corrosion resistance of the surface of the box body in response to the high salt fog, high damp heat and high ultraviolet environment of the ocean. Through the arrangement, the box-type transformer substation for the marine photovoltaic is provided with the sealed high-pressure chamber and the sealed low-pressure chamber, and the temperature and humidity adjusting air conditioner is arranged in the high-pressure chamber and the low-pressure chamber so as to cope with the marine high-humidity and heat environment; meanwhile, the surface of the box body is subjected to hot dip zinc and fluorocarbon paint spraying treatment, so that the corrosion resistance of the surface of the box body is enhanced, the box body is prevented from being corroded and damaged, and the service life of the box-type transformer substation is prolonged.

In the preferable technical scheme of the above-mentioned box-type substation for offshore photovoltaic, the box body comprises a box plate and a box door mounted on the box plate, and sealing strips are arranged between the box plate and the box door, and between the box door and the box door. Through the arrangement, the arrangement of the box door is convenient for overhauling the high-pressure air charging cabinet and the low-pressure cabinet; the arrangement of the sealing strips can enhance the sealing performance of the high-pressure chamber and the low-pressure chamber and avoid the influence of the external environment on the high-pressure air inflation cabinet and the low-pressure cabinet.

In the preferable technical scheme of the offshore photovoltaic box-type substation, the temperature and humidity regulation air conditioner is embedded on the box door and has the protection grade of ip54. Through foretell setting, the air conditioner of high protection level not only can maintain longer life in the adverse circumstances of ocean, can also prevent external gas, steam infiltration high pressure chamber and low pressure chamber, further avoids high pressure gas holder and low pressure cabinet to receive external environment's influence.

In the preferable technical scheme of the offshore photovoltaic box-type substation, the high-voltage inflating cabinet and the transformer are respectively provided with an insulating sleeve, the high-voltage inflating cabinet and the transformer are connected through a high-voltage power cable, and two ends of the high-voltage power cable are in plug-in fit connection with the insulating sleeves.

In the preferable technical scheme of the above-mentioned box-type substation for offshore photovoltaic, the high-voltage inflatable cabinet comprises a cabinet body, an air box arranged in the cabinet body, and a high-voltage operating mechanism arranged in the air box; and inert gas is filled in the gas tank. Through the arrangement, the inert gas can furthest reduce the discharge distance of the high-voltage electricity and prevent arc discharge, so that the whole volume of the high-voltage gas-filled cabinet is reduced.

In the preferable technical scheme of the offshore photovoltaic box-type substation, the inert gas is SF ₆ gas.

In the preferable technical scheme of the above-mentioned offshore photovoltaic box-type substation, the insulating bushing is arranged on the gas tank, and a plug-in lightning arrester is arranged on the gas tank. Through the arrangement, the lightning arrester can resist huge electromagnetic energy generated when a transformer substation or a transmission line is subjected to lightning strike impact or over-current impact, so that a high-voltage operating mechanism is protected.

In the preferable technical scheme of the offshore photovoltaic box-type substation, the high-voltage gas-filled cabinet is a gas-insulated closed switch gas-filled cabinet. Through foretell setting, the gas insulated switchgear that seals has seal structure, can protect the inside subassembly in abominable environment from the influence of outside pollution, the abominable environment of handling ocean that can be better.

In the preferable technical scheme of the offshore photovoltaic box-type substation, the transformer is a vegetable oil transformer and comprises an oil tank filled with vegetable oil and a radiator communicated with the oil tank. Through foretell setting, vegetable oil can insulate and dispel the heat to the transformer is inside to when the oil leak accident takes place for the transformer, vegetable cooling oil can degrade by oneself, reduces the pollution to the environment.

In the preferable technical scheme of the offshore photovoltaic box-type substation, the low-voltage cabinet is a GGD type low-voltage cabinet, and the low-voltage cabinet is connected with the transformer through a copper bus.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

Fig. 1 is a schematic view of an embodiment of the offshore photovoltaic box-type substation of the present invention.

Fig. 2 is a schematic top view of an embodiment of the offshore photovoltaic box substation of the present invention.

Fig. 3 is a schematic side view of an embodiment of the offshore photovoltaic box substation of the present invention.

Fig. 4 is an internal schematic view of an embodiment of the offshore photovoltaic box substation of the present invention.

Fig. 5 is a schematic top view of the inside of an embodiment of the offshore photovoltaic substation of the present invention.

Fig. 6 is a schematic side view of the inside of an embodiment of the offshore photovoltaic substation of the present invention.

List of reference numerals: 1. a case; 11. a box plate; 111. a base; 112. a wallboard; 113. a corner piece; 114. a protective net; 12. a door; 121. a door panel; 122. a hinge; 123. a lock lever; 13. temperature and humidity regulation air conditioner; 2. a transformer; 21. an oil tank; 22. a heat sink; 23. an insulating sleeve; 24. a low pressure dry sleeve; 3. a high pressure plenum; 31. an air box; 32. a lightning arrester; 4. and a low-voltage cabinet.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

The invention provides a box-type transformer substation for offshore photovoltaic, which aims to solve or solve the technical problem that the existing transformer substation is difficult to deal with special environments such as ocean high salt fog, high ultraviolet, high humidity and heat and the like and is extremely easy to cause corrosion damage of a transformer substation box body 1. This box-type substation for marine photovoltaic includes: a case 1, in which a case-change chamber, a high-pressure chamber, and a low-pressure chamber are formed in the case 1, the high-pressure chamber and the low-pressure chamber being arranged in a sealed manner, and a temperature and humidity adjusting air conditioner 13 being arranged in the high-pressure chamber and the low-pressure chamber, respectively; a transformer 2 disposed in the box transformer room; a high-voltage air charging cabinet 3 disposed in the high-voltage chamber and connected to the transformer 2; a low-voltage cabinet 4 disposed in the low-voltage chamber and connected to the transformer 2; a hot dip zinc layer and a fluorocarbon paint layer are sequentially arranged on the outer surface of the box body 1.

FIG. 1 is a schematic view of an embodiment of the offshore photovoltaic box-type substation of the present invention; FIG. 2 is a schematic top view of an embodiment of the offshore photovoltaic substation of the present invention; FIG. 3 is a schematic side view of an embodiment of the offshore photovoltaic substation of the present invention; fig. 4 is an internal schematic view of an embodiment of the offshore photovoltaic box substation of the present invention. As shown in fig. 1 to 4, in one or more embodiments, the offshore photovoltaic box-type substation of the present invention includes a box 1, a transformer 2, a high-voltage plenum 3, and a low-voltage cabinet 4.

With continued reference to fig. 1-4, the container body 1 is in the form of a generally rectangular parallelepiped container. In one or more embodiments, the interior of the tank 1 forms a tank transformer chamber, a high pressure chamber and a low pressure chamber, wherein the high pressure chamber and the low pressure chamber are sealingly arranged for mounting a high pressure plenum 3 and a low pressure plenum 4, respectively. The transformer chamber is arranged between the high-voltage chamber and the low-voltage chamber for mounting the transformer 2. Based on the orientation described in fig. 1, the high pressure chamber is located on the left side of the tank 1 and the low pressure chamber is located on the right side of the tank 1. Further, the cabinet 1 includes a cabinet plate 11 and a cabinet door 12 mounted on the cabinet plate 11. Specifically, the box board 11 includes a base 111, a wall board 112 mounted on the base 111, and a protection net 114. The base 111 is welded to form a channel steel, and is mainly used for carrying the above components, and can be fixed on an installation plane through a fixing structure such as a bolt. Preferably, a hollowed-out layer is arranged below the base 111, and a supporting structure is arranged in the hollowed-out layer, so that the cable is convenient to install. Further, the wall plate 112 is formed by bending a steel plate, and is welded above the base 111 to form a bracket of the case 1. The protection net 114 is installed on the case 1. Further, sealing strips are arranged between the box plate 11 and the box door 12, and between the box door 12 and the box door 12. The sealing strip, the box plate 11 and the box door 12 together enclose a high-pressure chamber and a low-pressure chamber in a sealed arrangement. Further, the corner pieces 113 are disposed between the case plates 11 and 11, between the case plates 11 and the case door 12, and between the case door 12 and the case door 12, and the corner pieces 113 can enhance connection stability and sealability.

With continued reference to fig. 1-4, in one or more embodiments, the transformer room is enclosed by a protective mesh 114, a base 111, and a box deck 11. Based on the orientation shown in fig. 1, the protection net 114 forms the upper wall, the front wall and the rear wall of the box-section room, the base 111 forms the bottom wall of the box-section room, and the box panel 11 forms the left and right side walls of the box-section room. Preferably, the front wall of the chamber comprises left and right front walls hinged to the wall panel 112 by a hinge 122 to open the chamber. Preferably, three guard nets 114 are detachably connected with the box plate 11, and three guard nets are arranged side by side on the upper wall of the box transformer room. In one or more embodiments, the plenum is enclosed by the door 12, the deck 11, the corner pieces 113, and the base 111. Based on the orientation shown in fig. 1, the box plate 11 forms the upper and right walls of the high-pressure chamber, the base 111 forms the lower wall of the high-pressure chamber, and the box door 12 forms the front, rear, and left walls of the high-pressure chamber. The door 12 is hinged with angle iron. Preferably, the front wall of the high pressure chamber is formed by one door 12 and the left wall of the high pressure chamber is formed by two doors 12. Further, the structure of the low pressure chamber is similar to that of the high pressure chamber, and will not be described here again. In one or more embodiments, the door 12 includes a door panel 121, a hinge 122, and a lock lever 123. The hinge 122 is used for installing the door plate 121, the lock rod 123 is used for locking the door 12, and the sealing strip is installed on the door plate 121.

With continued reference to fig. 1-4, in one or more embodiments, a hot dip zinc layer and a fluorocarbon paint layer are sequentially disposed on the outer surface of the tank 1. Specifically, after the box body 1 is assembled, the box body 1 is subjected to hot dip galvanizing to form a hot dip galvanizing layer, and finally fluorocarbon paint is sprayed to form a fluorocarbon paint layer. Alternatively, the individual components may be hot dip galvanized and sprayed with fluorocarbon paint, and the components may be formed into the case 1. Preferably, before hot dip galvanizing, the outer surface of the box 1 is subjected to sanding treatment, and the sanding can remove attachments or generated foreign matters on the surface of the box 1, so that the surface of the box 1 has certain corrosion resistance, and the adhesion force between the box 1 and a zinc layer can be improved.

Referring to fig. 3, in one or more embodiments, a temperature and humidity conditioning air conditioner 13 is disposed in the high pressure chamber and the low pressure chamber, respectively. Specifically, the temperature and humidity adjusting air conditioner 13 is embedded on the box door 12 and has a protection level ip54. The dust-proof grade is 5, although the invasion of dust cannot be completely prevented, the dust amount is not large, and the normal operation of the equipment cannot be influenced; the water repellency rating was 4, which indicates that the product could prevent the intrusion of splash water from all directions. Further, four temperature and humidity adjusting air conditioners 13 are respectively arranged in the high-pressure chamber and the low-pressure chamber, and each two temperature and humidity adjusting air conditioners 13 are embedded on one box door 12. Further, the temperature and humidity conditioning air conditioner 13 has opposite air inner and outer cycles, wherein the inner cycle is an air cycle in the high pressure chamber or the low pressure chamber, and the outer cycle is an outdoor air cycle to prevent water vapor from entering the high pressure chamber and the low pressure chamber.

FIG. 5 is a schematic top view of the interior of an embodiment of the offshore photovoltaic substation of the present invention; fig. 6 is a schematic side view of the inside of an embodiment of the offshore photovoltaic substation of the present invention. As shown in fig. 4, 5 and 6, the transformer 2 is disposed in a box transformer room. In one or more embodiments, the transformer 2 is a vegetable oil transformer 2 and includes a tank 21 filled with vegetable oil and a radiator 22 in communication with the tank 21. Specifically, the transformer 2 may further include a body of the transformer 2 and a transformer 2 oil conservator. The transformer 2 body is located inside the oil tank 21, and the transformer 2 conservator is connected with the oil tank 21 for circulating the vegetable oil along the inside of the oil tank 21, so that the vegetable oil comprises the outside of the transformer 2 body. The oil tank 21 is provided with a sealing channel, and the transformer 2 body is respectively electrically connected with the low-voltage cabinet 4 and the high-voltage inflatable cabinet 3 through the sealing channel. The environment-friendly plant cooling oil is mainly used for insulating and radiating the inside of the transformer 2, and is mainly characterized in that the environment-friendly plant cooling oil can be automatically degraded when an oil leakage accident occurs in the transformer 2, and the pollution to the environment can be reduced. Further, an insulating bushing 23 and a low-voltage dry bushing 24 are arranged on the transformer 2 body, wherein the insulating bushing 23 is close to the high-voltage gas-filled cabinet 3, and the low-voltage dry bushing 24 is close to the low-voltage cabinet 4. Further, a radiator 22 is located below the oil tank 21, and is used for radiating and cooling the vegetable oil in the oil tank 21. The heat sink 22 is a gooseneck fin. Alternatively, the radiator 22 may be a water-cooled radiator 22, an air-cooled radiator 22, or the like.

With continued reference to fig. 4, 5 and 6, the high pressure plenum 3 is mounted within a high pressure chamber. In one or more embodiments, the high voltage plenum 3 is a high voltage C-GIS plenum, i.e., a gas insulated closed switch plenum. Specifically, the high-pressure inflatable cabinet 3 comprises a cabinet body, an air box 31 arranged in the cabinet body and a high-pressure operating mechanism arranged in the air box 31; the gas box 31 is filled with an inert gas. Wherein, the cabinet body can be formed by bending and welding steel plates and is used for bearing a high-pressure operating mechanism and the air box 31; the gas box 31 may be a stainless steel gas box 31. Further, the inert gas may be SF6 gas. Alternatively, the gas may be nitrogen. Further, an insulating sleeve 23 is also arranged on the air box 31, the high-voltage inflatable cabinet 3 and the transformer 2 are electrically connected by a power cable, plug connectors matched with the high-voltage sleeve are arranged at two ends of the power cable, and plug-in type chain connectors and the high-voltage sleeve form plug-in matched connection. Further, on the gas tank 31, a plug-in arrester 32 is arranged, and the plug-in arrester 32 is arranged side by side with the high-voltage bushing.

With continued reference to fig. 4, 5 and 6, the low-voltage cabinet 4 is installed in a low-voltage chamber. In one or more embodiments, the low-voltage cabinet 4 is a GGD-type low-voltage cabinet 4. Specifically, the low-voltage cabinet 4 comprises a low-voltage cabinet 4 outer shell, an internal frame breaker, a plastic shell breaker and a knife-fuse switch lamp component. The shell of the low-voltage cabinet 4 is of a bearing structure of the components. The frame breaker is a mechanical switching device which can be switched on, bear and break the current under the normal circuit condition, can be switched on under the specified normal circuit condition, bear a certain time and break the current, is used as a device breaker, is used for installing a contact, an arc extinguishing chamber, a release, an operating mechanism and the like in a plastic shell, and can be combined with the frame breaker to form a switching device; the specific operation of the frame circuit breaker plastic case circuit breaker and the knife-fuse switch in the low-voltage cabinet 4 belongs to the technology known in the art, and will not be repeated here. Further, the low-voltage cabinet 4 is electrically connected with the transformer 2 through a copper bus. Both ends of the copper bus bar are respectively connected with the frame breaker and the low-voltage dry sleeve 24 on the transformer 2 body.

Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.

Claims (10)

1. An offshore photovoltaic box-type substation, comprising:

The box body (1) is internally provided with a box transformer chamber, a high-pressure chamber and a low-pressure chamber, wherein the high-pressure chamber and the low-pressure chamber are arranged in a sealing way, and a temperature and humidity regulating air conditioner (13) is respectively arranged in the high-pressure chamber and the low-pressure chamber;

A transformer (2) arranged in the box transformer room;

A high-voltage plenum (3) disposed within the high-voltage chamber and connected to the transformer (2);

a low-voltage cabinet (4) disposed in the low-voltage chamber and connected to the transformer (2);

the outer surface of the box body (1) is sequentially provided with a hot dip zinc layer and a fluorocarbon paint layer.

2. The offshore photovoltaic box-type substation according to claim 1, characterized in that the box (1) comprises a box plate (11) and a box door (12) mounted on the box plate (11), between the box plate (11) and the box door (12), the box door (12) and the box door (12) sealing strips are arranged.

3. The offshore photovoltaic box-type substation according to claim 2, characterized in that the temperature and humidity conditioning air conditioner (13) is embedded on the box door (12) and has a protection level ip54.

4. Offshore photovoltaic box-type substation according to claim 1, characterized in that an insulation bushing (23) is arranged on the high-voltage gas-filled cabinet (3) and the transformer (2), respectively, the high-voltage gas-filled cabinet (3) and the transformer (2) are connected by a high-voltage power cable and both ends of the high-voltage power cable are in plug-in fit connection with the insulation bushing (23).

5. The offshore photovoltaic box-type substation according to claim 4, characterized in that the high-voltage gas-filled tank (3) comprises a tank body, a gas tank (31) mounted in the tank body, and a high-voltage operating mechanism arranged in the gas tank (31); the gas tank (31) is filled with an inert gas.

6. The offshore photovoltaic box-type substation according to claim 5, wherein the inert gas is SF6 gas.

7. Offshore photovoltaic box-type substation according to claim 5, characterized in that the insulation bushing (23) is arranged on the gas tank (31) and that a plug-in arrester (32) is arranged on the gas tank (31).

8. The offshore photovoltaic box-type substation according to claim 4, characterized in that the high-voltage gas-filled cabinet (3) is a gas-insulated closed-switch gas-filled cabinet.

9. Offshore photovoltaic tank substation according to claim 1, characterized in that the transformer (2) is a vegetable oil transformer (2), the transformer (2) comprising a tank (21) filled with vegetable oil and a radiator (22) in communication with the tank (21).

10. The offshore photovoltaic box-type substation according to claim 1, characterized in that the low-voltage cabinet (4) is a GGD low-voltage cabinet, and the low-voltage cabinet (4) is connected with the transformer (2) through a copper bus.