CN202602115U - High-power photovoltaic inverter cabinet - Google Patents

Abstract

The utility model discloses a high-power photovoltaic inverter cabinet, comprising: a left power cabinet (1), an incoming and outgoing line cabinet (2), a right power cabinet (3), a base (4), a beam (5), a left power Cabinet (1) and right power cabinet (3) are symmetrically placed on both sides of the incoming and outgoing line cabinet (2), the symmetrical arrangement of the internal components of the left power cabinet (1) and right power cabinet (3) ) The symmetrical placement structure of internal devices; the left power cabinet (1), the incoming and outgoing line cabinet (2), and the right power cabinet (3) are combined and placed on the base (4) welded with channel steel, with 12 M12 Bolt connection, the beam (5) is two angle steels with hoisting holes, connected with the inverter cabinet with 12 M12 bolts. The beneficial effect of the utility model lies in that the overall layout of the cabinet body is reasonable, the internal strong and weak currents are divided into partitions, and mutual interference is avoided.

Description

A high-power photovoltaic inverter cabinet

technical field

The utility model belongs to the field of photovoltaic power generation, in particular to an inverter cabinet for high-power photovoltaic power generation.

Background technique

As global energy consumption continues to increase, and traditional energy is non-renewable, traditional conventional energy can no longer meet the supply of most countries. Moreover, the ecological environment problems caused by the use of traditional energy have also attracted special attention from various countries, so the development of renewable energy has become the general trend of long-term development. Today, when human beings are faced with two urgent problems of energy and environment, solar energy, as a renewable clean energy, has great commercial potential and environmental benefits, and photovoltaic power generation is safe, reliable, noiseless, pollution-free, less restricted, and fault-free. Low efficiency, easy maintenance, vast resources and other advantages that other conventional energy sources do not have. The direct current is converted into alternating current for direct use or for integration into the grid. Therefore, high-power photovoltaic inverter technology is also receiving more and more attention. Compared with other developed countries in the world, my country's high-power photovoltaic inverter technology started late, the technology is still immature, and there is still a lot to be done in terms of reliability and power generation efficiency. development space.

Contents of the invention

Aiming at the above shortcomings, the utility model provides a high-power inverter cabinet for photovoltaic power generation, which is characterized in that the overall layout of the cabinet is reasonable, the operation is convenient, the structure is compact, the installation is convenient, and it is safe and reliable.

The utility model takes the following technical solutions for realizing the above object:

1. The overall structure is composed of three sets of cabinets combined to form a symmetrical structure, which is reasonable in structure and easy to install.

The photovoltaic inverter cabinet is composed of left power cabinet, incoming and outgoing line cabinet and right power cabinet from left to right. Isolation boards are installed between the cabinets, which can play a good role in electromagnetic shielding. The photovoltaic inverter cabinet is installed in the slot On the base welded by steel, it is easy to install, the force is reasonable, and the reliability is high; the top is equipped with a hoisting beam for easy hoisting; the lower part of the three cabinets is equipped with a filter to take in the air to dissipate the cabinet body; the three cabinets are all It is a single door, with a door lock and handle on the left side, and a lock lever on the inside; there are circuit breaker handles in the middle of the three cabinet doors, forming a symmetrical structure. The left and right power cabinets are DC circuit breaker handles, and the incoming and outgoing cabinets are AC circuit breakers. There is an array of small square holes on the outside of the left and right power cabinet doors, which are symmetrically arranged for air intake and heat dissipation of the radiator; a row of three indicator lights is provided in the upper part of the incoming and outgoing line cabinet for displaying the status of the cabinet. There are three operation buttons or knobs under the indicator light for starting and stopping; there is a waterproof socket and a communication interface at the lower right of the door of the incoming and outgoing line cabinet for power supply and debugging of external equipment. the

2. The internal components of the cabinet are placed reasonably, and the space utilization is reasonable. The maximum external dimension of the cabinet is: 2400* 2285*853

(W*H*D, including base, air duct, and breaker handle) (mm)

Currently speaking, 500kw is a photovoltaic inverter with relatively large power, so the number and types of electrical components included are large, and the number and types of structural installation parts are also relatively large. Proper use, so the volume of the cabinet is controlled in a relatively small size, saving space for placement. Both the front and rear of the incoming and outgoing cabinets adopt a door structure that can be opened, which is convenient for maintenance and debugging, and there is a filter at the lower end of the cabinet door, and a fan is installed on the top. Heat dissipation effect; there are mainly three large installation boards in the incoming and outgoing cabinet to divide the internal space. The front panel is a whole board from top to bottom. Use; 2 ASIC boxes and a control box are installed symmetrically on the rear upper mounting plate, AC filters, AC contactors, filter capacitors, and small transformers are installed on the rear lower mounting plate, and rivet nuts are pressed on the back of the rear upper mounting plate. It is convenient to install components; those that need to be operated such as air switch, temperature control and moderate control switch are installed on the upper end of the front panel, and the AC circuit breaker is installed in the middle of the front panel; the AC outlet copper bar is installed on the lower part of the front panel, and the DC The wire copper bars are installed on both sides of the lower part of the cabinet, and the grounding copper bars are installed at the front end of the lower part of the cabinet; the lower part of the cabinet has wire holes for DC incoming and AC outgoing lines, and can also be used for introducing grounding wires to connect to the grounding copper bars; The AC circuit breaker and the AC filter are connected with copper bars, and the AC filter is connected with the AC contactor with copper bars. Two copper bars with the same shape are installed on each terminal at the lower end of the AC contactor. They are installed back to back, which is convenient for connecting more cables.

The beneficial effects of the utility model are: the overall layout of the cabinet is reasonable, and the internal strong and weak currents are partitioned to avoid mutual interference; the left power cabinet, the incoming and outgoing line cabinet, and the right power cabinet are equipped with isolation plates to prevent electromagnetic interference between the cabinets; The air ducts in each cabinet are arranged reasonably, and the ventilation is smooth, which is good for heat dissipation; the position of the incoming and outgoing wires is located at the lower part of the incoming and outgoing cabinets, which is convenient for wiring installation; The beam structure is reasonable, the force safety factor is high, and it is easy to hoist and install.

Description of drawings

Fig. 1 is the front structural representation of the utility model;

Fig. 2 is a schematic diagram of the rear structure of the incoming and outgoing line cabinet of the present utility model;

Fig. 3 is a schematic diagram of the front structure of the incoming and outgoing line cabinet of the present utility model;

Fig. 4 is a schematic diagram of the bottom structure of the incoming and outgoing line cabinet of the present invention.

Detailed ways

The utility model adopts the structure that the left power cabinet (1), the incoming and outgoing line cabinet (2), and the right power cabinet (3) are combined and formed, as shown in Figure 1. The three cabinets are respectively fixed to the base (4) with M12 bolts, and the doorposts of the left power cabinet (1) and the incoming and outgoing line cabinet (2), the incoming and outgoing line cabinet (2) and the right power cabinet (3) are equipped with cabinet connecting parts Connect them separately. The top of the cabinet is provided with a crossbeam (5), which connects the three cabinets and is used for hoisting simultaneously.

The incoming and outgoing line cabinet (2) contains the control unit and the AC circuit, including from top to bottom: the top fan (6), the ASIC box (8), the control box (7), the AC filter (12), and the AC contactor (13), AC circuit breaker (18), wherein AC contactor (13), AC filter (12), and AC circuit breaker (18) are connected with copper bars. The bottom plate (21) of the incoming and outgoing line cabinet (2) has a wire hole through which the grid-side AC loop cable passes through the hole to connect to the copper bar (19) on the AC circuit breaker, and the DC loop cable passes through the wire hole and the cabinet The DC copper bars (20) on both sides are connected.

There are three status indicators (22) on the door of the incoming and outgoing cabinet to display the status of the whole machine, and two knobs and an emergency stop switch (23) to operate the cabinet. The waterproof socket (25) at the lower end of the cabinet door And the debugging interface (26) facilitates the maintenance of the complete machine by maintenance personnel.

There is a fan in each cabinet involved in the utility model, and the air inlet and outlet can form a good convection channel, and the whole machine has good heat dissipation.

Claims (4)

1. A high-power photovoltaic inverter cabinet, including: left power cabinet (1), incoming and outgoing line cabinet (2), right power cabinet (3), base (4), beam (5), characterized in that: left The power cabinet (1) and the right power cabinet (3) are symmetrically placed on both sides of the incoming and outgoing line cabinet (2), the symmetrical arrangement of the internal components of the left power cabinet (1) and the right power cabinet (3), the incoming and outgoing line cabinet ( 2) The symmetrical placement structure of the internal components; the left power cabinet (1), the incoming and outgoing line cabinet (2), and the right power cabinet (3) are combined and placed on the base (4) welded with channel steel, using 12 M12 bolt connection, the crossbeam (5) is two angle steels with hoisting holes, connected to the inverter cabinet with 12 M12 bolts. 2. The high-power photovoltaic inverter cabinet according to claim 1, characterized in that: a top-mounted fan (6) is installed outside the top cabinet of the incoming and outgoing line cabinet (2); the control box (7) and the ASIC box (8) Installed on the rear upper mounting plate (9), with the operating surface facing backward; the ASIC box interface panel is equipped with a wiring trough (10); the rear lower mounting plate (11) is equipped with an AC filter (12) and an AC contactor (13) ;The lower part of the contactor is equipped with connecting copper bars (14); three rows of components (15) are installed on the upper front panel of the incoming and outgoing line cabinet, and the components are connected and fixed to the front panel (17) through DIN rails (16), and the components are installed and routed around Slot; AC circuit breaker (18) is installed in the middle of the front panel, and AC wiring copper bar (19) is installed on the AC circuit breaker; DC wiring copper bar (20) is installed on the left and right sides of the incoming and outgoing line cabinet; the bottom plate of the incoming and outgoing line cabinet (21) 26 round holes are opened on the top for passing cables. 3. The high-power photovoltaic inverter cabinet according to claim 1, characterized in that the upper part of the cabinet door of the incoming and outgoing line cabinet (2) is provided with a status indicator light (22) and a control button (23), which can be Display the operating status of the control cabinet and perform emergency stop and reset operations. A filter (24) is installed at the lower part of the cabinet door to facilitate air filtration and intake, so as to form a convective ventilation structure with the top fan (6), which is beneficial to the heat dissipation of the cabinet. 4. The high-power photovoltaic inverter cabinet according to claim 1, characterized in that, the lower part of the cabinet door of the incoming and outgoing line cabinet is provided with a waterproof socket (25) and a debugging interface (26), which are used for the photovoltaic inverter cabinet Power and communicate with external devices.

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