CN204290861U - Photovoltaic generation Combined integrated machine - Google Patents

Abstract

The utility model discloses a kind of photovoltaic generation Combined integrated machine, comprise the hyperbaric chamber (1) of the structure of one, operation with high pressure room (2), low-pressure chamber (3), transformer room (4), inverter room (5), cable floor frame and cover plate (6), ventilation air duct (7), protection bend (8), shutter (9), base (10), Systematical control electrical power distribution headstock (11); Be provided with in described hyperbaric chamber (1) and facilitate people to come in and go out the lower manhole of cable trough, described cable floor frame and cover plate (6), Systematical control electrical power distribution headstock (11) and the cable be pre-installed are positioned at inverter room (5).This photovoltaic generation Combined integrated machine meet outdoor installation use, integrated higher, overall volume is less, can reduce on-the-spot civil engineering, reduction cost of transportation and materials, weight gentlier, function more comprehensively, practicality is stronger.

Description

Combined all-in-one machine for photovoltaic power generation

technical field

The utility model mainly relates to the field of photovoltaic power generation equipment, and refers to a combined integrated machine for photovoltaic power generation.

Background technique

Solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the 21st century. It will not only replace some conventional energy sources, but also become the main body of the world's energy supply and can be widely used in various fields of social life. Driven by national projects such as the "Bright Project" pilot project and the "Power Transmission to the Countryside" project and the world's photovoltaic market, my country's photovoltaic power generation industry has developed rapidly. Stimulate more technologies to improve photovoltaic grid-connected power generation systems.

At present, large-scale photovoltaic power generation systems are generally composed of three parts: power generation, control, and storage and metering. The power generation part includes array solar panels; the control part includes combiner boxes, DC panels, Substations and other related communication monitoring equipment and other equipment; the storage and metering part includes metering boxes or photovoltaic power generation box-type substations with metering devices. In the project, multiple identical photovoltaic modules are connected in series through cables to form a single photovoltaic string with a higher DC voltage level; the combiner box combines the small currents of multiple photovoltaic strings into one large current output; multiple confluence The output of the box is output with a large current through the DC screen; the DC output of the DC screen is led to the input end of the inverter through the cable, and is converted into an AC output through the inverter; equipment such as photovoltaic power generation box-type substations are connected to the inverter The AC output of the system is boosted, and the high-voltage end is connected to the grid; at the same time, the temperature monitor, combiner box, DC screen, inverter, photovoltaic power generation box-type substation, etc. in the power generation system perform communication monitoring through the communication cabinet, and Communicate with the central control center.

At present, in the actual application of large-scale photovoltaic power generation system engineering, in order to meet the application in the outdoor environment of the site, there are two methods: the first is to build a civil engineering power distribution room for the DC panel, inverter, and communication cabinet at the photovoltaic field site. Each unit is arranged in it separately, and a photovoltaic power transformer is added to carry out the step-up hanging network billing operation; the other is that the equipment manufacturer manufactures special non-civil construction facilities for the above-mentioned units, and the above-mentioned unit equipment is divided according to its function. The structure is installed in it, and the photovoltaic power generation box-type substation is added to carry out the step-up and grid-connected billing operation.

Compared with the system, the entire DC power distribution, inverter power generation, communication monitoring, and booster hanging network systems are not highly integrated, and various functions are scattered in individual cabinets. The internal and external wiring of each device in the system is messy and the internal space Low utilization rate, poor system management, and inconvenient installation and maintenance, etc., the specific manifestations are as follows:

1. The equipment cabinets in the photovoltaic grid-connected power generation system, including DC screens, inverters, and communication cabinets, are basically indoor types. When used in large-scale photovoltaic grid-connected power generation systems, an additional distribution room with outdoor protection capabilities is required , the site construction volume is large, the period is long, and the cost is high.

2. The manufacturers of various equipment used in the photovoltaic grid-connected power generation system installed in the civil engineering power distribution room may not be uniform, and it is necessary to assemble cabinet equipment from different manufacturers, which may cause mismatching problems between equipment from different manufacturers ; and during the installation process, the equipment may be poorly connected due to the chaotic placement, which increases the difficulty of equipment installation. When there is a problem with the equipment, different manufacturers are required to provide after-sales maintenance services, which is not convenient for the installation of the entire system And maintenance.

3. The installation of DC screens, inverters, and communication cabinets in the civil engineering power distribution room is simply assembled and assembled. The spatial layout of the entire system is complex. It is necessary to contact each cabinet manufacturer to confirm the size of the cabinet and excavate the foundation, which is time-consuming and energy; and the functions of each equipment are not highly integrated, and each function is dispersed in each cabinet. The power distribution room is relatively large, with many materials and high cost.

4. In the photovoltaic grid-connected power generation system, there are many interfaces for each device, and there are many cables that need to be connected. There is no unified management of cable wiring, which is not convenient for on-site wiring and later maintenance; each cabinet is composed of separate structures, and each internal There are also many interfaces between the cabinets, the connection is complicated, and there are potential safety hazards. Moreover, it takes a long time to make cables on site, which delays the time for hanging the network.

Utility model patent content

The technical problem to be solved by the utility model is that: aiming at the technical problems existing in the prior art, the utility model provides an outdoor installation, higher integration, smaller appearance and volume, which can reduce on-site civil construction and reduce transportation costs. And materials, lighter weight, more comprehensive functions, more practical combined photovoltaic power generation all-in-one machine.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme of a combined integrated machine for photovoltaic power generation: a high-voltage room, a high-voltage operating room, a low-voltage room, a transformer room, an inverter room, and a cable shelf with an integrated structure and cover plates, ventilation ducts, protective elbows, louvers, bases, and system control power distribution power boxes; the high-voltage chambers, high-voltage operating rooms, low-voltage chambers, transformer rooms, and inverter rooms are all installed on the base. The ventilation duct is installed on the top of the inverter room, the protective elbow is fixed at the outlet of the corresponding air duct outside the inverter room, and the inverter room contains a DC screen, an inverter device and a communication cabinet device , the shutters are installed on the upper panel of the high-voltage room and the transformer room door panel; the high-voltage room, the high-voltage operating room, and the low-voltage room are arranged in an L-shape in sequence, and the transformer room is located opposite the high-voltage operating room and the low-voltage room. room, low-voltage room and inverter room are arranged side by side; the high-voltage room is provided with a manhole for people to enter and exit the cable trench, the cable shelf and cover plate, the system control power distribution power box and the pre-installed The cables are located in the inverter room.

The DC screen and the inverter are connected by cables through the cable shelf in the inverter room.

The connecting cables from the inverter in the inverter room to the low-voltage incoming device of the photovoltaic power transformer are connected in the cable shelf. The cable shelf is a perforated mounting plate, and the upper part is a movable plate.

The communication cabinet device is connected with external communication control equipment through at least one communication mode among RS485, Ethernet and WIFI to achieve communication monitoring function.

The system control power distribution power box provides control power supply for the communication cabinet device, the DC panel and the inverter device, and the low-voltage incoming line device of the photovoltaic power transformer.

After adopting the above structure, the utility model patent has the following advantages compared with the prior art:

1. The combined all-in-one machine for photovoltaic power generation of the present utility model adopts an integrated outdoor level protection box body, and connects the DC screen, inverter, communication cabinet, photovoltaic power generation transformer, connecting cables between the cabinets, and the system The control power distribution power box and various functions are fully integrated in the cabinet at one time, realizing the function of concentrating various devices in one box and directly installing and using them on site.

2. The combined integrated machine for photovoltaic power generation of the present utility model provides a small shape, reduces transportation costs and material costs, and at the same time realizes that there is no need to build a power distribution room on site, saving manpower and material resources, and reducing the on-site infrastructure construction of photovoltaic power plants. The construction has realized the integration of the traditional independent DC panel, inverter, and photovoltaic substation system functions, and the integration is integrated, which is convenient for installation and operation.

3. The combined integrated machine for photovoltaic power generation of the present utility model has highly integrated functions, and the space layout in the device is reasonable, which can effectively save space. The device is suitable for outdoor installation and use, and has higher integration, smaller volume and lighter weight. , more comprehensive functions, and stronger practicability; it can realize real-time monitoring of communication information.

4. In the combined integrated machine for photovoltaic power generation of the present utility model, an air duct is installed on the top of the inverter room, which is beneficial to reduce the temperature in the inverter room. At the same time, a windproof elbow is installed outside the inverter room to guide the hot air. The air enters from the bottom of the box to realize the effect of entering the cold air from the bottom and exporting the hot air from the upper part.

5. The combined integrated machine for photovoltaic power generation of the present utility model adopts a cable shelf structure in the inverter room, and a fixed beam is welded on the bottom plate. The cables from the DC screen to the inverter can be directly fixed on the fixed beam on the cable shelf On the top, the upper removable cover is convenient for cable installation and viewing.

Description of drawings

Accompanying drawing 1 is the structural diagram of the combined integrated machine for photovoltaic power generation of the present utility model.

Accompanying drawing 2 is the schematic diagram of the principle of the combined integrated machine for photovoltaic power generation of the present utility model.

As shown in the figure: 1. High voltage room, 2. High voltage operation room, 3. Low voltage room, 4. Transformer room, 5. Inverter room, 6. Cable shelf and cover plate, 7. Ventilation duct, 8. Windproof elbow, 9. Louver, 10. Base, 11. System control power distribution power box, 12. DC screen and inverter device, 13. Communication cabinet device.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model patent is further described:

As shown in Figure 1 and Figure 2, the combined integrated machine for photovoltaic power generation of the present utility model includes a high-voltage chamber 1, a high-voltage operating chamber 2, a low-voltage chamber 3, a transformer chamber 4, an inverter chamber 5, a cable shelf and a cover plate 6. The ventilation duct 7, the protection elbow 8, the louver 9 and the base 10 are an integrated structure, and also includes the DC screen and the inverter device 12 and the communication cabinet device 13 arranged in the inverter room 5, and the system control power supply Distribution power box 11. The chambers are arranged from left to right and from bottom to top; wherein, the high-voltage chamber 1, the high-voltage operating chamber 2, the low-voltage chamber 3, the transformer chamber 4, and the inverter chamber 5 are all installed on the base, ventilated The air duct 7 is installed on the top of the inverter room 5, and the protective elbow 8 is located outside the inverter room 5 at the corresponding air outlet of the air duct, and is fixed with a fixing piece. The inverter room 5 contains a DC screen and an inverter device 12, and the communication cabinet device 13, the shutters 9 are installed on the upper enclosure of the high voltage chamber 1 and the transformer chamber 4 door panels.

The high-voltage chamber 1, high-voltage operating chamber 2, and low-voltage chamber 3 are arranged in an L-shape in sequence, and the transformer chamber 4 is opposite to the high-voltage operating chamber 2 and the low-voltage chamber 3, while the high-voltage chamber 1, low-voltage chamber 3, and inverter chamber 5 are arranged side by side. , in the shape of "目". There is a lower manhole for people to go in and out of the cable trench in the high-voltage chamber 1 . The inverter room 5 is equipped with a cable shelf and a cover plate 6, a DC screen and an inverter device 12, a communication cabinet device 13, a system control power supply distribution power box 11, and pre-installed cables. The whole cabinet forms a complete and unified structure.

The transformer in the transformer chamber 4 is provided with a plurality of cooling fins, and the cooling fins are distributed on both sides of the transformer away from the high voltage chamber 1 and the low voltage chamber 3 .

The DC panel and the inverter device 12 are connected to the cables through the cable shelf and the cover plate 6 in the inverter chamber 5;

The connecting cables from the inverter device 12 to the low-voltage incoming line device of the photovoltaic power transformer are connected in the cable shelf and the cover plate 6. Both the cable shelf and the cover plate 6 are punched mounting plates, and the upper part is a movable plate. , for easy viewing of cables;

The communication cabinet device 13 is connected with external communication control equipment through at least one communication mode among RS485, Ethernet and WIFI to achieve communication monitoring function.

The system control power distribution power box 11 provides control power supply for the communication cabinet device 13, the DC panel and the inverter 12, and the low-voltage incoming line device of the photovoltaic power transformer.

The ventilation duct 7 is installed on the top of the inverter chamber 5 , the DC panel and the inverter device 12 , and the protective elbow 8 is installed outside the inverter chamber 5 at the outlet of the corresponding ventilation duct 7 .

The louvers 9 are installed on the upper panel of the high-voltage chamber 1 and the transformer chamber 4 to realize convection and achieve the purpose of smoothly dissipating the heat emitted by the transformer.

A control AC circuit breaker is installed in the low-voltage room 3, and the AC power after the inverter is inverted is input into the low-voltage terminal of the transformer, and the connection is completed, and a microcomputer communication device is installed synchronously, and the signals in the low-voltage room 3 are connected to the DC screen and the inverter. The signals of the converter device 12 and the communication cabinet device 13 are communicated to the operation center to achieve instant information.

According to the functional units, the utility model highly integrates the originally independent DC panels, inverters 12, communication cabinets 13, control low-voltage incoming lines, photovoltaic step-up transformers, and power distribution boxes 11 that provide control power for the system into one that meets the outdoor requirements. The installation makes the box body, and the internal units are connected by cables through the cable shelf 6 to form a combined integrated machine for photovoltaic power generation, which is convenient for practical use. It has DC transmission, the inverter converts DC into AC transmission, connects to the control low-voltage incoming line through cables, connects to the photovoltaic step-up transformer, integrated communication functions and multiple control power supply methods. Compared with existing applications, the functions are highly integrated and integrated, and the internal space layout of the device is reasonable, which can effectively save space. The device meets outdoor installation and use, and has higher integration, smaller volume, lighter weight, more comprehensive functions, and stronger practicability. The characteristics are convenient for the modular construction of photovoltaic power generation systems

In different embodiments, according to actual needs, the DC input of the utility model can be connected to one or more channels, and the DC panel and inverter integrated in the box can be a separate structure or a common structure. In different embodiments, the line is designed and operated according to actual needs.

Claims (5)

1. A combined integrated machine for photovoltaic power generation, characterized in that: a high-voltage chamber (1), a high-voltage operating chamber (2), a low-voltage chamber (3), a transformer chamber (4), and an inverter chamber comprising an integrated structure (5), cable shelf and cover plate (6), ventilation duct (7), protective elbow (8), shutter (9), base (10), system control power distribution power box (11); The high-voltage chamber (1), high-voltage operating chamber (2), low-voltage chamber (3), transformer chamber (4), and inverter chamber (5) are all installed on the base (10), and the ventilation duct (7 ) is installed on the top of the inverter chamber (5), the protective elbow (8) is fixed at the corresponding air outlet of the inverter chamber (5), and the inverter chamber (5) contains a DC screen And the inverter device (12) and the communication cabinet device (13), the shutters (9) are installed on the high voltage chamber (1), the transformer chamber (4) door panel upper coaming plate; the high voltage chamber (1), high voltage The operating room (2) and the low-voltage room (3) are arranged in an L-shape in turn, the transformer room (4) is located opposite the high-voltage operating room (2) and the low-voltage room (3), and the high-voltage room (1), low-voltage room ( 3) and the inverter room (5) are arranged side by side; the high-voltage room (1) is provided with a lower manhole for people to go in and out of the cable trench, the cable shelf and cover plate (6), the system control power distribution The power box (11) and pre-assembled cables are located in the inverter room (5). 2. The combined integrated machine for photovoltaic power generation according to claim 1, characterized in that: the DC screen and the inverter (12) are connected with cables through the cable shelf in the inverter room (5). 3. The combined integrated machine for photovoltaic power generation according to claim 1, characterized in that: the connection cable between the inverter in the inverter chamber (5) and the low-voltage incoming line device of the photovoltaic power generation transformer is on the cable layer After the connection in the rack is completed, the cable racks are all punched mounting plates, and the upper part is a movable plate. 4. The combined integrated machine for photovoltaic power generation according to claim 1, characterized in that: the communication cabinet device (13) is connected to an external communication control device through at least one communication mode among RS485, Ethernet, and WIFI to achieve communication monitoring role. 5. The combined integrated machine for photovoltaic power generation according to claim 1, characterized in that: the system control power distribution power box (11) is the communication cabinet device (13), a DC panel and an inverter device (12) and the low-voltage incoming line device of the photovoltaic power transformer to provide the power supply for control.