CN217087152U

CN217087152U - Photovoltaic power plant direct current generating line protection device

Info

Publication number: CN217087152U
Application number: CN202220231564.6U
Authority: CN
Inventors: 王贵忠; 李志杰
Original assignee: Lingwu Longqiao Photovoltaic New Energy Co ltd
Current assignee: Lingwu Longqiao Photovoltaic New Energy Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-07-29
Anticipated expiration: 2032-01-27

Abstract

The utility model provides a photovoltaic power plant direct current bus protection device, which comprises a double-layer structure shell, wherein the shell comprises an outer shell and an inner shell, and polyester fiber non-woven fabrics are arranged on the outer surface of the outer shell; the inner surface of the shell is provided with dustproof cotton; a bus control PCB is arranged on the inner shell; the utility model discloses can avoid the inside electron device of direct current generating line protection device to take place the short circuit because of the dust accumulation, the operation stably uprises the scheduling problem, and influences the operation of photovoltaic power plant.

Description

Photovoltaic power plant direct current generating line protection device

Technical Field

The utility model belongs to the power station protection field especially relates to a photovoltaic power plant direct current generating line protection device.

Background

The five northwest provinces are major provinces of photovoltaic power generation in China, photovoltaic power stations in the northwest region are mainly distributed in desert and mountain areas, and wind and sand are large all the year round, so that the bus protection device is prone to dust collection, normal operation of the photovoltaic power station direct-current bus protection device is affected, normal operation of the photovoltaic power station is affected, certain difficulty is brought to operation and maintenance, and in order to solve the problem, the photovoltaic power station direct-current bus protection device suitable for the northwest region is needed to be designed.

Disclosure of Invention

An object of the utility model is to provide a photovoltaic power plant direct current generating line protection device has solved the above-mentioned not enough that exists among the prior art.

In order to achieve the above purpose, the utility model discloses a technical scheme is:

the utility model provides a photovoltaic power plant direct current bus protection device, which comprises a double-layer structure shell, wherein the shell comprises an outer shell and an inner shell, and polyester fiber non-woven fabrics are arranged on the outer surface of the outer shell; the inner surface of the shell is provided with dustproof cotton; and the inner shell is provided with a bus control PCB.

Preferably, one end of each of the outer shell and the inner shell is provided with a heat dissipation hole; and a heat dissipation fan is arranged at the other end of the inner shell, and an air outlet of the heat dissipation fan corresponds to the heat dissipation holes.

Preferably, a fixing plate for mounting a bus control PCB plate is disposed in the inner housing.

Preferably, a water cooling pipeline is arranged on the non-mounting surface of the fixing plate.

Preferably, the installation position of the water cooling pipeline corresponds to the installation position of the bus control PCB.

Preferably, the non-mounting surface of the fixing plate is provided with an air cooling groove.

Preferably, the bus control PCB board comprises a central processing unit, and the central processing unit is connected with a digital signal processor.

Preferably, the central processing unit is connected with a touch screen and a starting element, wherein the touch screen is mounted on the front panel of the housing; the starting element is connected with a positive relay power supply.

Preferably, the central processor CT saturates the detection element.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a pair of photovoltaic power plant direct current generating line protection device, set up the polyester fiber non-woven fabrics, casing department is pressed close to the polyester fiber non-woven fabrics, the polyester fiber non-woven fabrics has ventilative, dampproofing, advantages such as long service life, the dust particle more than 2 mu m can be filtered to the polyurethane fiber non-woven fabrics, further prevent dust through dustproof cotton to bus control PCB board and handle, can avoid the inside electron device of direct current generating line protection device to take place the short circuit because of the dust accumulation, the operation stably uprises the scheduling problem, and influence the photovoltaic power plant operation.

Furthermore, a starting element is configured on the bus control PCB for the central processing unit, and the starting element is connected with a positive power supply of the relay, so that an operator can control and adjust the protection algorithm and the logic algorithm of the protection device only through the touch screen.

Furthermore, the electronic element is cooled through a water cooling pipeline and an air cooling tank, and normal operation of the photovoltaic power station direct-current bus protection device is guaranteed.

Drawings

Fig. 1 is a front view of the protection device of the present invention;

FIG. 2 is a front view of the internal structure of the protector of the present invention;

FIG. 3 is a front view of the internal structure of the back of the protection device of the present invention;

in the figure, 1, a front panel, 2, a touch screen, 3, a protective casing, 4, a bus control PCB board, 5, a heat radiation fan, 6, a fixing plate, 31, an outer shell, 32, an inner shell, 33, heat radiation holes, 34, polyester fiber non-woven fabric, 35, dustproof cotton, 41, a digital signal processor, 42, a central processing unit, 45.CT saturation detection elements, 46, a relay positive power supply, 47, starting elements, 61, a water cooling pipeline and 62, an air cooling tank are arranged.

Detailed Description

The following describes embodiments of the present invention with reference to fig. 1 to 3.

Fig. 1 illustrates the external shape of the protection device, a rectangular protection housing for dust and sand prevention, a front panel 1 mounted on the protection housing, a touch screen 2 embedded on the front panel, and a bus control PCB board 4 located on the protection housing.

Fig. 2 illustrates the internal structure of the protection device and the protection components, the protection enclosure 3 is a double-layer structure and is divided into an outer shell 31 and an inner shell 32, the outer shell 31 and other areas except the area covered by the touch screen 2 on the panel are all adhered to polyester fiber non-woven fabrics 34, dustproof cotton 35 is arranged between the outer shell and the inner shell, and the dustproof cotton 35 is attached to the inner side of the outer shell; the outer shell and the inner shell are both provided with radiating holes 33 which are uniformly distributed; a heat radiation fan 5 is arranged on the inner shell and used for enabling the air in the area where the electronic components are arranged to be communicated with the outside; the air outlet of the heat dissipation fan 5 corresponds to the heat dissipation hole 33.

The bus control PCB 4 is positioned in the inner shell, the bus control PCB 4 is provided with a digital signal processor 41 and a central processing unit 42 with a starting element, the digital signal processor 41 is used for realizing the functions of a protection algorithm and a logic algorithm, and the central processing unit 42 is used for realizing the communication function of the touch screen and the starting element; the starting element 47 is connected with the positive relay power supply 46, so that the positive relay power supply 46 is opened only when the starting element 47 acts, and any device damage is prevented from causing protection misoperation; the bus control PCB 4 is further provided with a CT saturation detection element 45, and the CT saturation detection element 45 is used for detecting the time sequence relation between the sudden change differential current and the sudden change braking current when a fault occurs so as to determine the fault.

Fig. 3 illustrates a heat dissipation structure of the back surface of the protection device, the bus control PCB 4 is mounted between the inner casings through the fixing plate 6, the back surface of the fixing plate 6 is provided with a water cooling pipeline 61 and an air cooling tank 62, the water cooling pipeline 61 corresponds to the area of the PCB where the cpu 42 is mounted, and the other area is the air cooling tank 62.

The working principle is as follows:

photovoltaic power plant direct current bus protection casing is inside intaglio shell and the mode of outside flat shell, is stained with the polyester fiber non-woven fabrics on the outside flat shell, uses the utility model discloses in, play dirt-proof effect, be particularly suitable for northwest area photovoltaic power plant environment, play the effect of protection to the inside electron device of direct current bus protection device, avoid the inside electron device of direct current bus protection device to take place the short circuit because of the dust accumulation, move stably and uprise the scheduling problem, and influence the photovoltaic power plant operation.

The photovoltaic power station direct current bus protection device is required to operate and work all the time due to working characteristics, even the photovoltaic power station direct current bus protection device is not stopped within 1 year, therefore, the working environment of an electronic device is influenced, although the external environment of the photovoltaic power station direct current bus protection device has air conditioner control temperature, the photovoltaic power station direct current bus protection device is arranged in a test cabinet, therefore, the space is narrow, through arranging the cooling fan 5, the air circulation in the protection casing 3 is increased, aiming at the characteristic that the central processing unit 42 is easy to generate heat, a water cooling pipeline 61 and an air cooling groove 62 are additionally arranged on the back of the fixing plate, the temperature generated by the digital signal processor 41, the central processing unit 42 and other devices is cooled, and the normal operation of the photovoltaic power station direct current bus protection device is ensured.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The photovoltaic power station direct-current bus protection device is characterized by comprising a shell with a double-layer structure, wherein the shell comprises an outer shell and an inner shell, and polyester fiber non-woven fabrics are arranged on the outer surface of the outer shell; the inner surface of the shell is provided with dustproof cotton; and the inner shell is provided with a bus control PCB.

2. The photovoltaic power plant direct current busbar protection device according to claim 1, wherein one end of each of the outer and inner housings is provided with a heat dissipation hole (33); and a heat radiation fan (5) is installed at the other end of the inner shell, and an air outlet of the heat radiation fan (5) corresponds to the heat radiation hole (33).

3. The photovoltaic power plant direct current busbar protection device according to claim 1, characterized in that a fixing plate (6) for mounting a busbar control PCB board is arranged in the inner casing.

4. The photovoltaic power plant direct current busbar protection device according to claim 3, characterized in that a water cooling pipeline is arranged on the non-mounting surface of the fixing plate (6).

5. The photovoltaic power plant direct current bus protection device according to claim 4, wherein the installation position of the water cooling pipeline corresponds to the installation position of the bus control PCB board (4).

6. The photovoltaic power plant direct current busbar protection device according to claim 3, characterized in that the non-mounting surface of the fixing plate (6) is provided with an air cooling groove (62).

7. The photovoltaic power plant direct current busbar protection device according to claim 1, characterized in that the busbar control PCB board (4) comprises a central processor (42), the central processor (42) being connected with a digital signal processor (41).

8. The photovoltaic power plant direct current bus protection device according to claim 7, characterized in that the central processing unit (42) is connected with a touch screen (2) and a starting element (47), wherein the touch screen (2) is mounted on a front panel of the housing; the starting element (47) is connected with a relay positive power supply (46).

9. The photovoltaic power plant dc bus protection device according to claim 7, characterized in that the central processor (42) is a CT saturation detection element (45).