Centralized photovoltaic inverter

Abstract

The utility model discloses a centralized photovoltaic inverter which comprises a base, a group of alternating current cabins are installed on the front side of the top end of the base, a direct current cabin is installed on the rear side of the alternating current cabins in an attached mode, a top seat is installed at the top end of the alternating current cabins, a protection seat is installed at the top end of the direct current cabin, and two groups of first alternating current circuit breakers are installed in the top seat. The front faces of the two first alternating-current circuit breakers face the same direction, the first alternating-current circuit breakers and the second alternating-current circuit breakers are connected in series and provided with three-phase copper bars, and a rotating cover plate is rotationally installed on the upper surface of the top base. The space of the alternating-current circuit breaker is increased under the condition that the size of the whole machine is not changed, the heat dissipation performance of the alternating-current circuit breaker is improved by increasing the surrounding space of the alternating-current circuit breaker, so that the service life is prolonged, the probability that faults such as arc discharge are caused during arc spraying is reduced by increasing the space of the alternating-current circuit breaker, faults are reduced, and the cost is reduced by optimizing the design. And the total usage amount of the copper bars is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic inverters, in particular to a centralized photovoltaic inverter. Background Art

[0002] In large centralized photovoltaic inverters, multi-channel MPPT is generally used, so there are multiple circuit breakers on the AC side, which are responsible for disconnecting each inverter module. In the traditional solution, these AC inverters are arranged side by side (that is, the operation panel faces the AC side door panel), and the outgoing copper busbars need to be gathered together and connected from the middle of the AC side.

[0003] The prior art has the following disadvantages: 1. Generally, the longitudinal space on the AC side of the inverter is small. When the circuit breaker is placed upright, the back is close to the backboard, which not only makes the copper busbar layout difficult, but also affects heat dissipation and poses a safety hazard.

[0004] 2. If arcing occurs in the AC circuit breaker under special working conditions, arcing and other problems may occur when the space is small, and may even cause serious accidents such as machine burning and explosion.

[0005] 3. The existing solution requires more copper bars, which will not only cause greater heat loss but also increase the cost of the whole machine, so a centralized photovoltaic inverter is needed now. Utility Model Content

[0006] The purpose of the utility model is to provide a centralized photovoltaic inverter, which places the AC circuit breaker sideways to increase the space, and reduces the use of copper bars by adopting the method of top-in and bottom-out of the outgoing copper bars and then collecting them to the main bar, so as to solve the technical problems mentioned in the background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a centralized photovoltaic inverter, comprising a base, a group of AC cabins are installed on the front side of the top of the base, a DC cabin is installed on the rear side of the AC cabin, a top seat is installed on the top of the AC cabin, a protective seat is installed on the top of the DC cabin, two groups of first AC circuit breakers are installed inside the top seat, and the front faces of the two groups of the first AC circuit breakers are in the same direction, the first AC circuit breaker and the second AC circuit breaker are installed in series with a three-phase copper busbar, and a rotating cover is rotatably installed on the upper surface of the top seat.

[0008] Preferably, two groups of door panels are rotatably installed on the outer sides of the AC cabin and the DC cabin respectively, and a plurality of groups of heat dissipation windows are installed through one of the two groups of door panels on the outer sides of the AC cabin and the DC cabin.

[0009] Preferably, a cavity is provided inside the top seat, and the upper end and the front side of the top seat are through surfaces.

[0010] Preferably, two sets of triangular limit frames are symmetrically bolted and installed inside the top seat, and the first AC circuit breaker and the second AC circuit breaker are installed between the two sets of triangular limit frames.

[0011] Preferably, the three-phase copper busbar input end extends from the inside of the AC cabin through the top seat and is connected to the back side of the first AC circuit breaker.

[0012] Preferably, a three-phase copper busbar is connected to the front of the first AC circuit breaker, and the three-phase copper busbar is connected to the back of the second AC circuit breaker. The front of the second AC circuit breaker extends into the interior of the AC cabin through the three-phase copper busbar to be connected to the inverter module.

[0013] Preferably, two groups of magnetic limit plates are symmetrically installed on both sides of the top seat, and the inner wall of the rotating cover plate is magnetically attached to the magnetic limit plates.

[0014] Preferably, a filter screen is installed through the outer side of the rotating cover plate, a clamping limit seat is installed in the rotating cover plate corresponding to the position of the filter screen, and a fan is installed in the clamping limit seat.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. In this solution, the AC circuit breaker is placed sideways, thereby increasing the space for the AC circuit breaker without changing the size of the entire machine. Based on the lateral layout of the AC circuit breaker, the output copper bars of each AC circuit breaker are collected on the main copper bar, and different copper bar widths are designed on the main copper bar according to the current size of different parts. The total output is connected from the side, thereby reducing the use of copper bars and saving costs.

[0017] 2. The space for the AC circuit breaker is increased without changing the size of the whole machine. By increasing the space around the AC circuit breaker, its heat dissipation performance is improved, thereby increasing its service life. By increasing the space for the AC circuit breaker, the probability of arcing and other faults caused during arc spraying is reduced, thereby reducing faults. By optimizing the design, the total use of copper busbars is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the top seat of the utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the first AC circuit breaker of the utility model;

[0021] Figure 4 This is a schematic diagram of the fan installation structure of the utility model.

[0022] In the figure: 1. Base; 2. AC compartment; 3. DC compartment; 4. Door panel; 5. Heat dissipation window; 6. Protective seat; 7. Top seat; 8. Triangular limit frame; 9. First AC circuit breaker; 10. Second AC circuit breaker; 11. Three-phase copper busbar; 12. Magnetic limit plate; 13. Rotating cover; 14. Filter; 15. Clamping limit seat; 16. Fan. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides: a centralized photovoltaic inverter, such as Figure 1-Figure 4 As shown, it includes a base 1, a group of AC cabins 2 are installed on the front side of the top of the base 1, a DC cabin 3 is installed on the rear side of the AC cabin 2, a top seat 7 is installed on the top of the AC cabin 2, a protective seat 6 is installed on the top of the DC cabin 3, two groups of first AC circuit breakers 9 are installed inside the top seat 7, and the front faces of the two groups of first AC circuit breakers 9 are in the same direction, the first AC circuit breaker 9 and the second AC circuit breaker 10 are installed in series with a three-phase copper bus 11, and a rotating cover plate 13 is rotatably installed on the upper surface of the top seat 7.

[0025] Preferably, two groups of door panels 4 are rotatably installed on the outer sides of the AC cabin 2 and the DC cabin 3, and one of the two groups of door panels 4 on the outer sides of the AC cabin 2 and the DC cabin 3 is penetrated by a plurality of groups of heat dissipation windows 5. The use of the AC cabin 2 and the DC cabin 3 is stably limited by the provided base 1, the use stability of the AC cabin 2 and the DC cabin 3 is protected, and the use position of the AC cabin 2 and the DC cabin 3 is synchronized. At the same time, the door panels 4 installed on the outer sides of the AC cabin 2 and the DC cabin 3 can ensure that the staff can quickly inspect and maintain the internal structure of the AC cabin 2 and the DC cabin 3. At the same time, the heat dissipation windows 5 penetrated by two groups of door panels 4 can dissipate the temperature inside the AC cabin 2 and the DC cabin 3 on the corresponding side, thereby further improving the overall use stability and service life of the device.

[0026] Furthermore, a cavity is opened inside the top seat 7, and the upper end and the front side of the top seat 7 are through surfaces. The cavity starting from the inside of the top seat 7 can accommodate the first AC circuit breaker 9 and the second AC circuit breaker 10, and no plates are provided on the top and the front side of the top seat 7 to ensure the stable installation and use of the rotating cover plate 13, so that the top seat 7 can flexibly protect the first AC circuit breaker 9 and the second AC circuit breaker 10, and can also quickly open the rotating cover plate 13 to inspect the first AC circuit breaker 9 and the second AC circuit breaker 10, thereby improving the convenience of using the device.

[0027] Furthermore, two sets of triangular limit frames 8 are symmetrically bolted and installed inside the top seat 7, and the first AC circuit breaker 9 and the second AC circuit breaker 10 are installed between the two sets of triangular limit frames 8. The two sets of triangular limit frames 8 installed inside the top seat 7 can limit the first AC circuit breaker 9 and the second AC circuit breaker 10, thereby improving the stability of the use of the first AC circuit breaker 9 and the second AC circuit breaker 10, so as to avoid the first AC circuit breaker 9 and the second AC circuit breaker 10 from shifting during long-term use, resulting in unstable connection of the three-phase copper bus 11, thereby improving the service life of the device.

[0028] It is worth noting that the input end of the three-phase copper busbar 11 extends from the inside of the AC cabin 2 through the top seat 7 and is connected to the back of the first AC circuit breaker 9. The three-phase copper busbar 11 extends from the inside of the AC cabin 2 and is connected to the first AC circuit breaker 9 and the second AC circuit breaker 10. While protecting and increasing the connectivity between the first AC circuit breaker 9 and the second AC circuit breaker 10, it reduces the space occupied by the device and limits the use direction of the first AC circuit breaker 9 and the second AC circuit breaker 10, thereby increasing the operating space of the first AC circuit breaker 9 and the second AC circuit breaker 10 without changing the size of the entire machine.

[0029] Specifically, a three-phase copper busbar 11 is connected to the front of the first AC circuit breaker 9, and the three-phase copper busbar 11 is connected to the back of the second AC circuit breaker 10. The front of the second AC circuit breaker 10 extends into the AC cabin 2 through the three-phase copper busbar 11 to be connected to the inverter module. The surrounding space of the first AC circuit breaker 9 and the second AC circuit breaker 10 is increased, and the heat dissipation performance thereof is improved, thereby increasing the service life. By increasing the space between the first AC circuit breaker 9 and the second AC circuit breaker 10, the probability of causing arcing and other faults during arc spraying is reduced, thereby reducing faults.

[0030] In addition, two groups of magnetic limit plates 12 are symmetrically installed on both sides of the top seat 7. The inner wall of the rotating cover plate 13 is magnetically attached to the magnetic limit plates 12. The set magnetic limit plates 12 can protect the rotating cover plate 13 when it rotates to cover the top seat 7, thereby improving the protection effect of the first AC circuit breaker 9 and the second AC circuit breaker 10.

[0031] Preferably, a filter 14 is installed through the outside of the rotating cover 13, a clamping limit seat 15 is installed inside the rotating cover 13 at a position corresponding to the filter 14, and a fan 16 is installed inside the clamping limit seat 15. The filter 14 installed on the outside of the rotating cover 13 converts the internal temperature of the cavity of the top seat 7 so that the internal temperature of the top seat 7 will not be too high, and the fan 16 is limited by the clamping limit seat 15. During the operation of the fan 16, the use effect of the first AC circuit breaker 9 and the second AC circuit breaker 10 can be effectively improved to avoid failure of the first AC circuit breaker 9 and the second AC circuit breaker 10.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centralized photovoltaic inverter, characterized in that: include: A base (1), wherein a group of AC cabins (2) are installed on the front side of the top of the base (1), and a DC cabin (3) is installed on the rear side of the AC cabin (2); A top seat (7) is mounted on the top of the AC cabin (2); a rotating cover plate (13) is rotatably mounted on the upper surface of the top seat (7); A protective seat (6) is installed on the top of the DC compartment (3), two groups of first AC circuit breakers (9) are installed inside the top seat (7), and the front faces of the two groups of first AC circuit breakers (9) are facing the same direction; and A three-phase copper busbar (11) installed between the first AC circuit breaker (9) and the second AC circuit breaker (10).

2. A centralized photovoltaic inverter according to claim 1, characterized in that: Two groups of door panels (4) are rotatably mounted on the outside of the AC cabin (2) and the DC cabin (3), respectively, and a plurality of groups of heat dissipation windows (5) are installed through one of the two groups of door panels (4) on the outside of the AC cabin (2) and the DC cabin (3).

3. A centralized photovoltaic inverter according to claim 2, characterized in that: A cavity is provided inside the top seat (7), and the upper end and the front side of the top seat (7) are through surfaces.

4. A centralized photovoltaic inverter according to claim 3, characterized in that: Two sets of triangular limit frames (8) are symmetrically bolted and installed inside the top seat (7), and the first AC circuit breaker (9) and the second AC circuit breaker (10) are installed between the two sets of triangular limit frames (8).

5. A centralized photovoltaic inverter according to claim 4, characterized in that: The input end of the three-phase copper busbar (11) passes through the top seat (7) from the inside of the AC cabin (2) and extends into the back side of the first AC circuit breaker (9) for connection.

6. A centralized photovoltaic inverter according to claim 5, characterized in that: The front of the first AC circuit breaker (9) is connected to a three-phase copper busbar (11), and the three-phase copper busbar (11) is connected to the back of the second AC circuit breaker (10), and the front of the second AC circuit breaker (10) extends into the interior of the AC cabin (2) through the three-phase copper busbar (11) to be connected to the inverter module.

7. A centralized photovoltaic inverter according to claim 6, characterized in that: Two groups of magnetic limiting plates (12) are symmetrically installed on both sides of the top seat (7), and the inner wall of the rotating cover plate (13) is magnetically attached to the magnetic limiting plates (12).

8. A centralized photovoltaic inverter according to claim 7, characterized in that: A filter screen (14) is installed through the outside of the rotating cover plate (13), a clamping limit seat (15) is installed in the rotating cover plate (13) at a position corresponding to the filter screen (14), and a fan (16) is installed in the clamping limit seat (15).

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