CN203166773U - Photovoltaic inverter alternating-current cabinet - Google Patents

Abstract

The utility model provides an AC cabinet for a photovoltaic inverter. The AC cabinet is a cabinet with double cabinet doors. The cabinet is divided into upper and lower layers; the upper layer includes an inverted F-shaped bracket, and the inverted F-shaped bracket The horizontal plate is a mounting plate, and the vertical plate of the inverted F-shaped support is a support plate; the lower layer includes two support plates vertically installed between the two side walls of the lower layer; the components of the inverter That is, the isolation transformer, uninterruptible power supply, AC circuit breaker, cabinet output, AC contactor, EMI AC filter, sampling transformer and filter capacitor are installed on the mounting plate of the support plate. Compared with the prior art, the photovoltaic inverter AC cabinet provided by the utility model is simple and convenient to assemble, has good heat dissipation efficiency, and can effectively shield electromagnetic interference between components.

Description

Photovoltaic inverter AC cabinet

technical field

The utility model relates to an inverter AC cabinet, in particular to an AC cabinet for a high-power photovoltaic inverter.

Background technique

Solar energy is a new kind of green energy. Because of its cleanness, high efficiency, inexhaustibility, and not being limited by geographical resources, as well as its advantages of safety, reliability, no noise, less constraints, low failure rate, and simple maintenance, it can be widely used in Various fields of social life, especially in the field of photovoltaic grid-connected power generation.

Photovoltaic grid-connected inverter is an important device in the field of photovoltaic power generation, which can directly affect the power quality of photovoltaic power generation. But at present, for high-power photovoltaic grid-connected inverters, there are still many unreasonable aspects in its structural layout, such as poor heat dissipation, serious electromagnetic interference, inconvenient installation and maintenance, etc. The main manifestations are as follows:

l. The heat dissipation performance of the heating device and the box is poor, and the poor heat dissipation performance will cause the thermal breakdown of the switching power tube. When the temperature of the box is high, it will even reduce the performance of some devices, thus making the whole system unstable. ;

2. Strong current and weak current, DC and AC, power module and control module are mixed together, which cannot solve the problem of electromagnetic interference. Electromagnetic interference will cause the decline of electrical equipment, transmission channels or system performance;

3. Unreasonable layout structure makes installation and maintenance of components inconvenient.

Therefore, it is very necessary to provide a high-power photovoltaic inverter AC cabinet. The components of the AC part of the photovoltaic inverter are installed in a cabinet, so that the components of the DC part and the AC part of the photovoltaic inverter are separated. Installation, reduce electromagnetic interference between components, and reduce adverse effects on power quality.

Contents of the invention

In order to meet the needs of the prior art, the utility model provides a high-power photovoltaic inverter AC cabinet, the AC cabinet is a cabinet with double doors, the cabinet is divided into upper and lower layers; the upper layer includes an inverted F-shaped bracket; the lower floor includes a support plate vertically arranged;

Preferably, the horizontal plate of the inverted F-shaped bracket is a mounting plate, and the vertical plate of the inverted F-shaped bracket is a supporting plate; the number of supporting plates in the lower layer is two, and the cabinet door is divided into front and rear doors, Installing plates parallel to the cabinet doors are respectively arranged on the side near the front door of the support plate near the front door and the side near the rear door of the support plate far from the front door;

Preferably, an isolation transformer and an uninterruptible power supply are respectively installed on the short horizontal plate and the long horizontal plate of the inverted F-shaped support;

Preferably, the installation plate on the front door side of the lower layer is installed with an AC circuit breaker and a cabinet output piece sequentially from top to bottom;

Preferably, the mounting plate on the rear door side of the lower floor is sequentially installed with an AC contactor and an EMI AC filter from top to bottom;

Preferably, the sampling transformer and the filter capacitor are sequentially installed on the mounting board on one side of the EMI AC filter from top to bottom;

Preferably, the AC contactor, the EMI AC filter and the AC circuit breaker are connected by hard copper bars, soft copper bars or cables;

Preferably, the front door, the rear door and the top cover of the cabinet are provided with ventilation openings, and the ventilation openings form heat dissipation channels; filters are respectively installed on the inside of the ventilation openings of the front door and the rear door of the cabinet to filter out the heat dissipation channels. Impurities in the air intake; cooling fans are installed outside the air vents on the top cover of the cabinet.

The beneficial effects of the utility model are:

1. In the technical solution of the utility model, the AC components in the photovoltaic inverter are installed separately in the AC cabinet, so that the AC components and the DC components are separated, and the electromagnetic interference between the components is effectively reduced;

2. In the technical solution of the present utility model, air vents are provided on the front door, back door and top cover of the AC cabinet, filters are respectively installed inside the air vents of the front door and the back door of the cabinet, and cooling fans are installed outside the air vents of the top cover of the cabinet, so that The heat dissipation of the AC cabinet is good;

3. The photovoltaic inverter AC cabinet provided by the utility model has a reasonable layout structure, which makes the installation and maintenance of various components simple and convenient.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Figure 1 shows the front view of the internal structure of the high-power photovoltaic inverter AC cabinet;

Figure 2 shows the left view of the internal structure of the high-power photovoltaic inverter AC cabinet;

Figure 3 shows the rear view of the internal structure of the high-power photovoltaic inverter AC cabinet;

Fig. 4 shows the front view of the high-power photovoltaic inverter AC cabinet;

Among them: 1: Mounting plate a; 2: Uninterruptible power supply; 3: AC circuit breaker; 4: AC output terminal; 5: Mounting plate b: 6: EMI AC filter; 7: AC contactor; 8: Mounting plate c ;9: mounting plate d; 10: isolation transformer; 11: cooling fan; 12: sampling transformer; 13: filter capacitor; 14: filter; 15: support plate.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

The utility model provides a high-power photovoltaic inverter AC cabinet, the AC cabinet is a cabinet with double doors, and the cabinet is divided into upper and lower layers; the upper layer includes an inverted F-shaped bracket; the lower layer includes a vertical support plate;

Figures 1, 2 and 3 show the internal structure of the high-power photovoltaic inverter AC cabinet. The inverted F-shaped short horizontal plate and long horizontal plate are respectively mounting plate d (9) and mounting plate c (8) The inverted F-shaped vertical plate is a support plate (15); the number of support plates in the lower layer is two, and the cabinet door is divided into a front door and a back door, and the front door is close to the support plate near the front door. Installing plate a (1) and mounting plate b (5) parallel to the cabinet door are respectively provided on one side of the support plate farther from the front door and on the side close to the rear door;

The uninterruptible power supply (2) (Uninterruptible Power Supply, UPS) and the isolation transformer (10) are respectively installed on the mounting plate c (8) and the mounting plate d (9); the AC circuit breaker (3) and the cabinet output piece (4) Installed on the mounting plate a (1) of the lower layer of the cabinet from top to bottom; AC contactor (7) and EMI AC filter (6) (Electro Magnetic Interference, EMI) are installed on the cabinet from top to bottom On the mounting board b (5) of the lower layer; the sampling transformer (12) and the filter capacitor (13) are sequentially installed on the mounting board b (5) on one side of the EMI AC filter (6) from top to bottom; The contactor (7), the EMI AC filter (6) and the AC circuit breaker (3) are connected through hard copper bars, soft copper bars or cables.

Fig. 4 shows the front view of the high-power photovoltaic inverter AC cabinet, the front door, the rear door and the top cover of the cabinet of the high-power photovoltaic inverter AC cabinet are all provided with vents, and the vents form a heat dissipation channel; A cooling fan (11) is installed on the outside of the cover vent; filters (14) are respectively installed on the inside of the cabinet front door and rear door ventilation openings to filter out impurities in the air intake of the cooling channel.

In the technical solution of the utility model, the AC components in the photovoltaic inverter are separately installed in the AC cabinet, so that the AC components and the DC components are separated, and the electromagnetic interference between the components is effectively reduced; The components of the AC cabinet are fixed on the installation board, and then the installation board is installed in the cabinet, so that the installation, inspection and maintenance of the AC cabinet can be performed more simply and conveniently.

Finally, it should be noted that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Claims (8)

1. a photovoltaic DC-to-AC converter exchanges cabinet, and described interchange cabinet is two cabinet door racks, it is characterized in that, described rack is divided into two-layer up and down; Described upper strata comprises the shape of the falling F support of setting; Described lower floor comprises the supporting bracket of vertical setting.

2. a kind of photovoltaic DC-to-AC converter as claimed in claim 1 exchanges cabinet, it is characterized in that the level board of the described shape of falling F support is mounting panel, and the vertical plate of the described shape of falling F support is supporting bracket; The supporting bracket number of described lower floor is two, described cabinet door is divided into Qianmen and back door, with the side at the close Qianmen of the nearer supporting bracket in described Qianmen with a side at the close back door of described Qianmen supporting bracket far away the mounting panel parallel with described cabinet door is set respectively.

3. a kind of photovoltaic DC-to-AC converter as claimed in claim 2 exchanges cabinet, it is characterized in that, on the short level board of the described shape of falling F support and the long level board isolating transformer and uninterrupted power supply is installed respectively.

4. a kind of photovoltaic DC-to-AC converter as claimed in claim 2 exchanges cabinet, it is characterized in that, AC circuit breaker and rack output are installed from top to bottom successively near the mounting panel of preceding reveal by described lower floor.

5. a kind of photovoltaic DC-to-AC converter as claimed in claim 2 exchanges cabinet, it is characterized in that, A.C. contactor and EMI alternating current filter are installed from top to bottom successively near the mounting panel of back reveal by described lower floor.

6. a kind of photovoltaic DC-to-AC converter as claimed in claim 5 exchanges cabinet, it is characterized in that, sampling transformer and filter capacitor are installed on the mounting panel of described EMI alternating current filter one side from top to bottom successively.

7. exchange cabinet as claim 4 or 5 described a kind of photovoltaic DC-to-AC converters, it is characterized in that, connect by hard copper row, soft copper row or cable between described A.C. contactor, described EMI alternating current filter and the described AC circuit breaker.

8. a kind of photovoltaic DC-to-AC converter as claimed in claim 1 exchanges cabinet, it is characterized in that the Qianmen of described rack, back door and top cover arrange ventilating opening, and described ventilating opening forms heat dissipation channel; The inboard of the Qianmen of described rack and the ventilating opening at back door is installed filter respectively; Radiator fan is installed in the outside of described rack top cover ventilating opening.

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