CN218472727U - Low-voltage current collection circuit device of photovoltaic power station - Google Patents
Low-voltage current collection circuit device of photovoltaic power station Download PDFInfo
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- CN218472727U CN218472727U CN202222898740.4U CN202222898740U CN218472727U CN 218472727 U CN218472727 U CN 218472727U CN 202222898740 U CN202222898740 U CN 202222898740U CN 218472727 U CN218472727 U CN 218472727U
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Abstract
A low-voltage current collection circuit device of a photovoltaic power station comprises a direct-current cable, wherein the direct-current cable is connected into a group string type inverter, the group string type inverter inverts direct current into alternating current and then is connected into an overhead circuit connecting end through an alternating-current cable, and the overhead circuit connecting end is connected to a box transformer substation through a power cable; the utility model discloses a group's string formula dc-to-ac converter cable is qualified for the next round of competitions, inserts overhead line, is favorable to reducing the cable use amount, stridees across the unusable land area between the photovoltaic district, effectively promotes photovoltaic district land availability, has simple structure, economy reliable, the fortune that is convenient for maintain personnel's operation characteristics.
Description
Technical Field
The utility model belongs to the technical field of power line engineering, concretely relates to photovoltaic power plant low pressure current collection circuit device.
Background
In the construction process of a photovoltaic power station, land conditions with complex landforms and complex land attributes are frequently encountered, and areas where photovoltaic components can be arranged have several meters to dozens of meters of unavailable land areas such as basic farmlands, public welfare forests, arbor forest lands or cultivated lands and the like. Typically, low voltage collecting cable lines cannot be laid in similarly unavailable land areas. And the cable laying technology of the existing photovoltaic power station has the cableway type, the cable bridge, the direct cable burying mode and the like, the cable joint construction process is complex, fault points are difficult to find, accidents are inconvenient to deal with in time, the cable consumption is large, the price is high, and the one-time investment cost in the construction period is high.
Disclosure of Invention
In order to overcome the defect that above-mentioned prior art exists, the utility model aims to provide a photovoltaic power plant low pressure current collection circuit device is qualified for the next round of competitions through organizing string formula dc-to-ac converter cable, inserts overhead line, is favorable to reducing low pressure current collection cable use amount, stridees across the unusable land area between the photovoltaic district, effectively promotes photovoltaic district soil availability, has simple structure, economic and reliable, the characteristics of the operation of the fortune dimension personnel of being convenient for operation.
In order to realize the purpose, the utility model discloses a following technical scheme:
the utility model provides a photovoltaic power plant low pressure current collection circuit device, includes direct current cable 1, direct current cable 1 is connected with the cable incoming end of group string formula dc-to-ac converter 2, and the group string formula dc-to-ac converter 2 inserts the overhead line incoming end through alternating current cable 3 after with the direct current contravariant to the alternating current, and the overhead line connects the outgoing end and is connected to the cable incoming end of case transformer substation 11 through power cable 10.
The overhead line comprises cable fixing supports 4 which are symmetrically arranged, and an alternating current cable 3, a parallel groove clamp 5, an overhead conductor 6, an isolating switch 7, a lightning arrester 8 and a post insulator 9 which are sequentially connected are arranged on the cable fixing supports 4.
The cable fixing support 4 is also provided with a grounding device 14, and the lightning arrester 8 is connected with the grounding device 14 through a lead.
The overhead conductor 6 is an insulated conductor.
The cable fixing support 4 is installed on the chassis 13, and the lower end of the cable fixing support 4 is further provided with a chuck 12.
The beneficial effects of the utility model reside in that:
1. the group string type inverter 2 is connected to an overhead line through an alternating current cable 3, so that the use amount of the cable is reduced, and meanwhile, the operation and maintenance personnel are convenient to operate.
2. The overhead conductor 6 adopts an insulated conductor, so that the investment is saved compared with a cable while the safe use is ensured, and the economic benefit is improved.
3. The chuck 12 is arranged at the bottom of the cable fixing support 4, and when the cable fixing support 4 is acted by wind, the chuck 12 applies force opposite to the wind direction to the cable fixing support 4, so that the stability of the cable fixing support 4 is improved.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a schematic structural diagram of the pv panel-to-string inverter 2.
In the figure: 1-a direct current cable; 2-group of series inverters; 3-an alternating current cable; 4-cable fixing bracket; 5-parallel groove clamp; 6-overhead lines; 7-an isolating switch; 8-a lightning arrester; 9-post insulators; 10-a power cable; 11-box transformer substation; 12-a chuck; 13-a chassis; 14-ground means.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, a low-voltage current collecting line device of a photovoltaic power station includes a dc cable 1, the dc cable 1 is connected to a cable incoming end of a string inverter 2, the string inverter 2 inverts dc power into ac power and then connects the ac power to an overhead line incoming end through an ac cable 3, and an overhead line outgoing end is connected to a cable incoming end of a box transformer 11 through a power cable 10.
The overhead line comprises cable fixing supports 4 which are symmetrically arranged, and alternating current cables 3, parallel groove clamps 5, overhead conductors 6, isolating switches 7, lightning arresters 8 and post insulators 9 which are sequentially connected are arranged on the cable fixing supports 4.
The cable fixing support 4 is also provided with a grounding device 14, and the lightning arrester 8 is connected with the grounding device 14 through a lead.
The overhead conductor 6 is an insulated conductor.
The cable fixing support 4 is installed on the chassis 13, and a chuck 12 is further arranged at the lower end of the cable fixing support 4.
The utility model discloses the theory of operation does:
firstly, excavating a foundation pit of a telegraph pole, placing a chassis 13 in the foundation pit, sleeving the lower part of a cable fixing support 4 in the foundation pit and placing the cable fixing support on the chassis 13, and installing a chuck 12 in a direction opposite to the stress of the lower end of the cable fixing support 4; a DC cable 1 special for photovoltaic is connected to the lower end of the group string type inverter 2; the group string type inverter 2 inverts the direct current into alternating current, and an alternating current cable 3, a parallel groove clamp 5 and an overhead conductor 6 which are connected in sequence are arranged on the cable fixing support 4 to convey current; an overhead conductor 6 is sequentially connected with an isolating switch 7, a lightning arrester 8 and a post insulator 9, and an overhead line is downwards connected with a box transformer substation 11 along a cable fixing support 4 through a power cable 10; the lightning arrester 8 is also connected to earth via a wire connection to an earthing device 14.
The utility model discloses can effectively solve and can often meet the land use condition that topography and landform are complicated, the soil attribute is complicated in photovoltaic power plant construction process, can arrange photovoltaic module's region and have several meters to tens meters basic farmland, public welfare woods, arbor woodland or arable land etc. between each other and can not utilize the regional problem of soil, effectively increase photovoltaic array and arrange the area, can not lay at cable run the place with idle land area utilization.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a photovoltaic power plant low pressure current collection circuit device, includes direct current cable (1), its characterized in that: the direct current cable (1) is connected with a cable access end of the group string type inverter (2), the group string type inverter (2) inverts direct current into alternating current and then accesses an overhead line access end through the alternating current cable (3), and an overhead line access end is connected to a cable access end of the box transformer substation (11) through the power cable (10).
2. A photovoltaic power plant low voltage collection circuit arrangement as claimed in claim 1, characterized in that: the overhead line comprises cable fixing supports (4) which are symmetrically arranged, and an alternating current cable (3), a parallel groove clamp (5), an overhead conductor (6), an isolating switch (7), a lightning arrester (8) and a post insulator (9) which are sequentially connected are arranged on the cable fixing supports (4).
3. A photovoltaic power plant low voltage collection circuit arrangement as claimed in claim 2, characterized in that: the cable fixing support (4) is further provided with a grounding device (14), and the lightning arrester (8) is connected with the grounding device (14) through a wire.
4. The low-voltage collection circuit device of a photovoltaic power plant according to claim 2, characterized in that: the overhead conductor (6) adopts an insulated conductor.
5. A photovoltaic power plant low voltage collection circuit arrangement as claimed in claim 2, characterized in that: the cable fixing support (4) is installed on the chassis (13), and a chuck (12) is further arranged at the lower end of the cable fixing support (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222898740.4U CN218472727U (en) | 2022-11-01 | 2022-11-01 | Low-voltage current collection circuit device of photovoltaic power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222898740.4U CN218472727U (en) | 2022-11-01 | 2022-11-01 | Low-voltage current collection circuit device of photovoltaic power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218472727U true CN218472727U (en) | 2023-02-10 |
Family
ID=85149324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222898740.4U Active CN218472727U (en) | 2022-11-01 | 2022-11-01 | Low-voltage current collection circuit device of photovoltaic power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218472727U (en) |
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2022
- 2022-11-01 CN CN202222898740.4U patent/CN218472727U/en active Active
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