CN217362590U

CN217362590U - Photovoltaic inversion grid-connected device

Info

Publication number: CN217362590U
Application number: CN202220898838.7U
Authority: CN
Inventors: 黄超洋; 李靖; 乔梁; 王建峰; 周燎; 张文静; 陈憧
Original assignee: Hainan Jinpan Intelligent Technology Co ltd
Current assignee: Hainan Jinpan Intelligent Technology Co ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-09-02
Anticipated expiration: 2032-04-19

Abstract

The application discloses photovoltaic contravariant is incorporated into power networks device includes: a box body; the three-split dry type transformer is arranged inside the box body; the three inverters are sequentially arranged in the box body along the length direction of the box body and are respectively connected with three low-voltage sides of the three-split dry-type transformer; and the heat conducting port is arranged in the box body and used for realizing the air flowing into and out of the box body and carrying the heat of the three-split dry-type transformer and the three inverters out of the box body. The heat conduction mouth includes: the inverter heat dissipation air inlet is positioned below the inverter and used for introducing outside air into the position below the inverter; the inverter heat dissipation air outlet and the inverter heat dissipation air inlet are arranged on two sides of the width of the box body and located above the inverter, and the inverter heat dissipation air outlet and the inverter heat dissipation air inlet are used for guiding heat of the inverter out of the box body.

Description

Photovoltaic inversion grid-connected device

Technical Field

The application relates to the technical field of electrical equipment, in particular to a photovoltaic inversion grid-connected device.

Background

At present, an inverter, a transformer and a switch cabinet are integrated aiming at an integrated photovoltaic inversion grid-connected device, the mode of a traditional inversion room and a box transformer substation is changed, the site construction work is greatly simplified, meanwhile, the manufacturing cost can be effectively saved, and the integrated photovoltaic inversion grid-connected device is widely applied to a plurality of large-scale centralized and distributed photovoltaic power stations at the present stage.

With the development of product technology, the capacity of a photovoltaic inverter is gradually increased, and when an integrated inversion grid-connected device of a plurality of high-capacity photovoltaic inverters is designed, how to solve the problems of installation of a high-capacity transformer, heat dissipation of the inverters and the transformer and prevention of mutual interference among the inverters is a problem which is urgently needed to be solved by product design.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the present application provides a photovoltaic inverter grid-connected device, including:

a box body;

the three-split dry-type transformer is arranged inside the box body;

the three inverters are sequentially arranged in the box body along the length direction of the box body and are respectively connected with three low-voltage sides of the three-split dry-type transformer;

and the heat conduction port is arranged in the box body and used for realizing the air flow-in and flow-out of the box body and carrying the heat of the three-split dry-type transformer and the three inverters out of the box body.

In some embodiments, the thermal port comprises:

the heat dissipation air inlet of the inverter is positioned below the inverter and used for guiding outside air into the position below the inverter;

the inverter heat dissipation air outlet and the inverter heat dissipation air inlet are arranged on two sides of the width of the box body and located above the inverter, and the inverter heat dissipation air outlet and the inverter heat dissipation air inlet are used for guiding heat of the inverter out of the box body.

In some embodiments, the inverter heat dissipation air inlet and the inverter are spaced apart from each other, and a heat conduction pipe is disposed between the inverter heat dissipation air outlet and the inverter.

In some embodiments, the thermal port comprises:

the transformer heat dissipation air inlet is positioned below the three-split dry-type transformer and used for guiding outside air into the position below the three-split dry-type transformer;

and the transformer heat-dissipation air outlet is positioned above the three-split dry-type transformer and used for guiding the heat of the three-split dry-type transformer out of the box body.

In some embodiments, the transformer heat dissipation air inlets are disposed on both sides of the width of the box body and spaced apart from the three-split dry-type transformer, and the transformer heat dissipation air outlets are disposed on both sides of the width of the box body and spaced apart from the three-split dry-type transformer.

In some embodiments, the heat dissipation air inlet of the transformer is arranged at the bottom of the box body.

In some embodiments, the heat dissipation air outlet of the transformer is further provided with a fan.

In some embodiments, three inverters communicate with a three-split dry transformer through a bus bridge.

In some embodiments, service access is left between the three inverters and the inside of the box.

In some embodiments, the inside of the box body is also provided with a high-voltage ring main unit and a communication power cabinet.

Compared with the prior art, according to the photovoltaic inversion grid-connected device provided by the application, the three low-voltage sides of the three-split dry-type transformer are respectively connected with the inverter, the three-split dry-type transformer can operate in a split mode, the short-circuit resistance is good, meanwhile, the external air is introduced into the box body through the heat conduction port formed in the box body, and then the three-split dry-type transformer and the inverter are cooled, so that the problems of arrangement, heat dissipation and split operation of the photovoltaic inversion grid-connected device can be effectively solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a front view of a photovoltaic inversion grid connection device provided in an embodiment of the present application;

FIG. 2 is an internal schematic view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 5 is a rear schematic view of a photovoltaic inversion grid connection device provided in an embodiment of the present application;

wherein:

the transformer heat dissipation air conditioner comprises a box body 1, a three-split dry-type transformer 2, an inverter 3, an inverter heat dissipation air inlet 41, an inverter heat dissipation air outlet 42, a transformer heat dissipation air inlet 43, a transformer heat dissipation air outlet 44 and a fan 5.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to better understand the technical scheme of the present application, the following detailed description is provided for the person skilled in the art with reference to the accompanying drawings and the detailed description.

The application provides a photovoltaic contravariant is incorporated into power networks device please refer to the description attached figure 1 to attached figure 5, and photovoltaic contravariant is incorporated into power networks device includes: the three-phase dry-type transformer comprises a box body 1, a three-split dry-type transformer 2, three inverters 3 and a heat conducting port, wherein the box body 1 can be a container shell with 40 feet, and the shell of the box body 1 can be made of high-weather-resistance steel plates and section steel.

The three-split dry type transformer 2 may be a high-capacity (4500kVA) dry type transformer, the three-split dry type transformer 2 is disposed inside the box 1, and the three-split dry type transformer 2 may be an axial three-split dry type transformer, and it is known that normal power transmission of the split dry type transformer is performed only between the high-voltage winding and the low-voltage winding, and the split dry type transformer has a function of limiting short-circuit current in case of a fault. The capacity of the branches is the same, the rated voltage is equal or close, the branches can be operated independently or in parallel, and the branches can bear the same or different loads. When a load or a power supply connected to one low-voltage winding fails, the other low-voltage windings can still normally operate, wherein the three-split dry-type transformer 2 can operate in a split mode, has good short-circuit resistance and is environment-friendly and maintenance-free.

Three inverters 3 are arranged inside the box body 1 in sequence along the length direction of the box body 1, the three inverters 3 can be arranged in a straight line, the three inverters 3 are respectively connected with three low-voltage sides of the three-split dry-type transformer 2, namely, the three-split dry-type transformer 2 is adopted, the three low-voltage sides are respectively connected with one inverter 3, the three inverters 3 do not interfere with each other when in work, and split impedance meets the use requirement.

The heat conduction port is arranged in the box body 1 and is used for realizing air flowing in and out of the box body 1 and bringing heat of the three-split dry-type transformer 2 and the three inverters 3 out of the box body 1. In particular, the container 1 herein may employ a 40-foot standard shipping container housing, the three-split dry transformer 2 may be a 4.5MW high capacity resin dry transformer, and the inverter 3 is a 1500kW photovoltaic inverter. The photovoltaic inversion grid-connected device described herein adopts a three-split dry-type transformer 2 for the first time, and three independent inverters 3 are connected to the secondary side of the transformer.

The inside of box 1 still is equipped with high-pressure looped netowrk cabinet and communication power cabinet, and the high-pressure looped netowrk cabinet can be SF6 high-pressure looped netowrk cabinet specifically, and the specific model can be GMU-12SF6 aerifys the cabinet, and its performance is good, can use different adverse circumstances.

In some embodiments, referring to fig. 3 of the specification, the heat conducting port includes an inverter heat dissipating air inlet 41 and an inverter heat dissipating air outlet 42, the inverter heat dissipating air inlet 41 is located below the inverter 3, and the inverter heat dissipating air inlet 41 is used for guiding the external air to a position below the inverter 3; the inverter heat dissipation air outlet 42 and the inverter heat dissipation air inlet 41 are arranged on two sides of the width of the box body 1, the inverter heat dissipation air outlet 42 is located above the inverter 3, and the inverter heat dissipation air outlet 42 is used for guiding heat of the inverter 3 out of the box body 1.

The inverter heat dissipation air inlet 41 and the inverter 3 are arranged at intervals, and a heat conduction pipe is arranged between the inverter heat dissipation air outlet 42 and the inverter 3. Outside air enters the box body 1 through the inverter heat dissipation air inlet 41 and is blown to the bottom of the inverter 3, the air moves upwards from the bottom of the inverter 3 to take away heat inside the inverter 3, and the air is discharged out of the box body 1 through the inverter heat dissipation air outlet 42 through the heat conduction pipe above the inverter 3, so that heat dissipation of the inverter 3 can be achieved.

In some embodiments, referring to fig. 4 of the specification, the heat conducting port includes a transformer heat dissipating air inlet 43 and a transformer heat dissipating air outlet 44, the transformer heat dissipating air inlet 43 is located below the three-split dry-type transformer 2, and the transformer heat dissipating air inlet 43 is used for guiding the outside air to a position below the three-split dry-type transformer 2; the transformer heat dissipation air outlet 44 is located above the three-split dry-type transformer 2, and the transformer heat dissipation air outlet 44 is used for guiding heat of the three-split dry-type transformer 2 out of the box body 1.

The transformer heat dissipation air inlets 43 are arranged on two sides of the width of the box body 1, the transformer heat dissipation air inlets 43 and the three-split dry-type transformer 2 are arranged at intervals, the transformer heat dissipation air outlets 44 are arranged on two sides of the width of the box body 1, and the transformer heat dissipation air outlets 44 and the three-split dry-type transformer 2 are arranged at intervals.

The transformer heat dissipation air inlet 43 can also be arranged at the bottom of the box body 1, and it can be seen that outside air flows into the box body 1 from the two sides and the bottom of the width of the box body 1 respectively and blows to the three-split dry-type transformer 2 along different directions, so that heat inside the three-split dry-type transformer 2 is taken out of the box body 1 through the transformer heat dissipation air outlet 44, and heat dissipation of the three-split dry-type transformer 2 is achieved.

Air inlet grids can be arranged at the heat dissipation air inlet 41 of the inverter and the heat dissipation air inlet 43 of the transformer, so that the heat dissipation effect is effectively improved. The inverter heat dissipation air inlet 41 and the transformer heat dissipation air inlet 43 can adopt double S shutters, the outer sides of the inverter heat dissipation air inlet 41 and the transformer heat dissipation air inlet 43 are provided with anti-circulation ventilation hoods, the transformer heat dissipation air inlet 43 can also be provided with wind and sand prevention shutters, the protection is ensured, meanwhile, the protection cotton of the wind and sand prevention shutters is convenient to replace, in addition, the wind resistance of the wind and sand prevention shutters is small, the wind direction of the outlet air is as horizontal as possible, and the inlet and outlet air backflow at the same side is avoided.

The fan 5 is arranged at the heat dissipation air outlet 44 of the transformer, the flow of air is accelerated through the fan 5, the heat dissipation efficiency of the three-split dry-type transformer 2 is improved, and the normal operation of the photovoltaic inversion grid-connected device is ensured.

Three inverters 3 are communicated with the three-split dry-type transformer 2 through a bus bridge, an overhaul channel is reserved between the three inverters 3 and the inner side of the box body 1, a branch line row can penetrate out of the lower portion of the inverter 3 to a lifting support behind the inverter 3 and then is connected to a transformer room through the bus bridge and further communicated with the three-split dry-type transformer 2, and the bus bridge is reserved behind a cabinet of the three inverters 3 and used for being connected with a copper bar of the three-split dry-type transformer 2.

The photovoltaic inversion grid-connected device provided by the application is described in detail above. The principles and embodiments of the present application are described herein using specific examples, which are only used to help understand the method and its core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. A photovoltaic inversion grid-connected device is characterized by comprising:

a box body (1);

a three-split dry-type transformer (2) disposed inside the case (1);

three inverters (3) which are sequentially arranged in the box body (1) along the length direction of the box body (1) and are respectively connected with three low-voltage sides of the three-split dry-type transformer (2);

and the heat conduction port is arranged in the box body and used for realizing the air flow in and out of the box body (1) and carrying the heat of the three-split dry-type transformer (2) and the three inverters (3) out of the box body (1).

2. The grid-connected inverter/inverter device according to claim 1, wherein the thermal port comprises:

the inverter heat dissipation air inlet (41) is positioned below the inverter (3) and used for introducing outside air into the position below the inverter (3);

the inverter heat dissipation air outlet (42) and the inverter heat dissipation air inlet (41) are arranged on two sides of the width of the box body, are located above the inverter (3), and are used for guiding heat of the inverter (3) out of the box body (1).

3. The pv inversion grid-connection device according to claim 2, wherein the inverter heat dissipation air inlet (41) and the inverter (3) are spaced apart from each other, and a heat pipe is disposed between the inverter heat dissipation air outlet (42) and the inverter (3).

4. The grid-connected inverter/inverter device according to claim 1, wherein the thermal port comprises:

the transformer heat dissipation air inlet (43) is positioned below the three-split dry-type transformer (2) and used for guiding outside air into the position below the three-split dry-type transformer (2);

and the transformer heat-dissipation air outlet (44) is positioned above the three-split dry-type transformer (2) and used for guiding the heat of the three-split dry-type transformer (2) out of the box body (1).

5. The photovoltaic inversion grid-connection device according to claim 4, wherein the transformer heat dissipation air inlets (43) are disposed on both sides of the width of the box body (1) and spaced apart from the three-split dry-type transformer (2), and the transformer heat dissipation air outlets (44) are disposed on both sides of the width of the box body (1) and spaced apart from the three-split dry-type transformer (2).

6. The photovoltaic inversion grid-connected device according to claim 5, wherein the transformer heat dissipation air inlet (43) is arranged at the bottom of the box body (1).

7. The photovoltaic inversion grid-connected device according to claim 5, wherein the transformer heat dissipation air outlet (44) is further provided with a fan (5).

8. The grid-connected inverter device according to claim 1, wherein three inverters (3) are connected to the three-split dry-type transformer (2) through a bus bridge.

9. The grid-connected inverter device according to claim 1, wherein an access channel is reserved between three inverters (3) and the inner side of the box body (1).

10. The photovoltaic inversion grid-connected device according to claim 1, wherein a high voltage ring main unit and a communication power cabinet are further arranged inside the box body (1).