CN117767134A - Multi-protection photovoltaic grid-connected special cabinet - Google Patents
Multi-protection photovoltaic grid-connected special cabinet Download PDFInfo
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- CN117767134A CN117767134A CN202410050642.6A CN202410050642A CN117767134A CN 117767134 A CN117767134 A CN 117767134A CN 202410050642 A CN202410050642 A CN 202410050642A CN 117767134 A CN117767134 A CN 117767134A
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- 239000002131 composite material Substances 0.000 claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 23
- 238000009423 ventilation Methods 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 108010066278 cabin-4 Proteins 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The invention relates to a multi-protection special photovoltaic grid-connected cabinet. Including the main cabinet body, the main cabinet body is equipped with shell and front bezel subassembly, front bezel subassembly is measuring storehouse, the storehouse of opening circuit, compound storehouse and anti-island storehouse with shell internal partition, measuring storehouse, the storehouse of opening circuit and compound storehouse connect gradually, measuring storehouse, the storehouse of opening circuit and compound storehouse communicate the front end panel of shell respectively, anti-island storehouse sets up in compound storehouse, anti-island storehouse and the storehouse intercommunication of opening circuit. According to the invention, the metering bin, the circuit breaking bin and the composite bin are arranged in the main cabinet body to perform the most basic functions of power distribution, electric energy metering and protection control, the anti-islanding device is arranged in the circuit breaking bin, and the anti-islanding device is arranged in the anti-islanding bin, so that the anti-islanding failure caused when a plurality of photovoltaic inverters are connected in a grid mode at the same time is avoided, and the distribution, communication, convection ventilation and cooling of the cabinet body ensure that the device in the special cabinet can stably operate.
Description
Technical Field
The invention belongs to the field of special cabinets, and particularly relates to a multi-protection special photovoltaic grid-connected cabinet.
Background
The photovoltaic grid-connected cabinet is equipment for converting a solar power generation system into alternating current electric energy which can be connected to a power grid. Such devices typically include a multi-stage current protection trigger circuit and a power control center (PLC) controlled electrical system.
In the photovoltaic grid-connected cabinet, direct-current electric energy generated by the solar panel is firstly collected into a junction box. The direct current circuit breaker in the junction box can be protected under the condition of short circuit or overload, and meanwhile, the junction box establishes a parallel circuit through the direct current group serial connection terminal, so that the electrical connection of the solar cell panel is realized.
And then, the photovoltaic grid-connected cabinet converts the collected direct-current electric energy into alternating-current electric energy. This is achieved by a power electronic conversion device, which typically comprises one or more inverters that convert direct current to alternating current. In the process, the photovoltaic grid-connected cabinet is also responsible for controlling and adjusting the quality and quantity of the electric energy so as to ensure that the output alternating-current electric energy meets the standards and requirements of a power grid.
In order to ensure the safety and stability of the photovoltaic grid-connected cabinet, a multistage current protection trigger circuit is generally adopted. Such a circuit may automatically shut off the power supply when the current exceeds a predetermined value to prevent damage to the equipment and the grid from excessive currents. In addition, the photovoltaic grid-connected cabinet may also comprise other protection functions, such as overvoltage protection, undervoltage protection, over-frequency protection, low-frequency protection and the like.
According to relevant regulations of industry standard specifications such as NB/T32004-2018 photovoltaic grid-connected inverter technical specification, the photovoltaic grid-connected inverter has an anti-islanding effect protection function. The photovoltaic "islanding" can be interpreted as the fact that when the inverter is operating in grid-connected mode, the mains cannot supply power to the local load for various reasons, and at this time, if there is no islanding technology, the inverter will continue to supply power to the local load and the local grid load.
In general, the photovoltaic islanding effect may adversely affect the entire distribution system equipment and the equipment at the user side, mainly including:
1. the personal safety of the power transmission line maintenance personnel of the power company is jeopardized.
2. Affecting the protection switch action program on the power distribution system.
3. And the phenomenon of unstable supply voltage and frequency in the power island region.
4. Phase dyssynchrony problems caused when the utility power is restored.
5. The solar power supply system causes the problem of phase-lack power supply of a three-phase load of the system due to single-phase power supply.
In order to quickly detect the power failure of the power grid, two 'island effect' detection methods of a passive type and an active type are generally required, and once the power failure of the power grid is confirmed, the inverter is disconnected from the power grid and the operation of the inverter is stopped within a plurality of periods.
With further widespread use of photovoltaic grid-connected power generation systems, when multiple photovoltaic inverters are simultaneously grid-connected, the variation in the output of the different inverters is very large, resulting in possible failure of the above method.
Disclosure of Invention
In order to solve the technical problems, the invention provides the multi-protection photovoltaic grid-connected special cabinet, which is characterized in that the metering bin, the breaking bin and the compound bin are arranged in the main cabinet body to perform the most basic functions of power distribution, electric energy metering and protection control, the anti-islanding device is arranged in the breaking bin, the anti-islanding device is arranged in the anti-islanding bin, so that the anti-islanding failure caused when a plurality of photovoltaic inverters are simultaneously connected in grid is avoided, and the distribution communication and convection ventilation cooling of the bin body ensure that the device in the special cabinet can stably operate.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a special cabinet of multi-protection's photovoltaic grid-connected, includes the main cabinet body, the main cabinet body is equipped with shell and front bezel subassembly, front bezel subassembly is divided into measuring bin, the storehouse of breaking, compound storehouse and anti-island storehouse with shell internal partition, measuring bin, the storehouse of breaking and compound storehouse connect gradually, measuring bin, the storehouse of breaking and compound storehouse communicate the front end panel of shell respectively, anti-island storehouse sets up in compound storehouse, anti-island storehouse and the storehouse intercommunication of breaking.
The shell consists of a rectangular bottom plate with four sides bent, a left side plate assembly and a right side plate assembly which are arranged on two sides of the bottom plate and fixedly connected with the bottom plate, a top plate which is arranged above the left side plate assembly and the right side plate assembly and fixedly connected with the upper ends of the left side plate assembly and the right side plate assembly, and a back plate which is arranged behind the bottom plate and fixedly connected with the bottom plate, the left side plate assembly, the right side plate assembly and the top plate assembly respectively;
the left side plate assembly comprises a left bottom plate, a left upright post and a left cover plate, the upper end and the lower end of the left bottom plate and the upper end and the lower end of the left cover plate are respectively connected with the top plate and the bottom plate, and the left upright post is connected to the overlapping part of the left bottom plate and the left cover plate; the right side plate assembly comprises a right bottom plate, a right upright post and a right cover plate, wherein the upper end and the lower end of the right bottom plate and the right cover plate are respectively connected with the top plate and the bottom plate, and the right upright post is connected to the overlapping part of the right bottom plate and the right cover plate.
The front plate assembly consists of a metering group plate, a circuit breaking group plate and a composite group plate; the metering group plate comprises a first rectangular plate and a first cover plate, the upper end of the first rectangular plate is connected with the top plate, the side face of the first rectangular plate is respectively connected with the left cover plate and the right cover plate, the first rectangular plate and the top plate are enclosed to form a metering bin, and the first cover plate is covered at an opening of the metering bin; the circuit breaking group plate comprises a second rectangular plate and a second cover plate, the back surface of the second rectangular plate is connected with the left upright post and the right upright post respectively, the second rectangular plate, the top plate and the first rectangular plate are enclosed to form a circuit breaking bin, and the second cover plate is covered at an opening of the circuit breaking bin; the composite group board comprises two groups of wire guide boards and a third cover board, the upper end and the lower end of the two groups of wire guide boards are respectively connected with a second rectangular board and a bottom board, the two groups of wire guide boards are respectively parallel to a left cover board and a right cover board, the two groups of wire guide boards, the second rectangular board, the back board and the bottom board are enclosed to form a composite bin, the third cover board is covered at an opening of the composite bin, and a wire guide cavity communicated with the open-circuit bin is formed between the two groups of wire guide boards and the left cover board/the right cover board;
the bottom of the first rectangular plate is provided with a through hole, and the through hole is communicated with the wire cavity; the back of the second rectangular plate is provided with a plurality of fan seats, and the open-circuit bin and the composite bin are communicated through the fan seats; the bottom plate is provided with a wire outlet hole; the backboard is provided with a vent hole, and the vent hole is arranged at the lower end of the backboard.
The main cabinet body is also provided with an anti-island group board, the anti-island group board comprises a curved board, the upper end of the curved board is connected with a top board, two sides of the curved board are respectively connected with a left bottom board and a right bottom board, the lower end of the curved board is connected with a second rectangular board, qu Xingban, the top board and the second rectangular board are enclosed to form an anti-island cabin, and the anti-island cabin, the open-circuit cabin and the composite cabin are sequentially communicated through a plurality of fan seats; the left bottom plate is provided with a ventilation seat, the right bottom plate is provided with an access hole, and the ventilation seat and the access hole are communicated with the anti-island cabin.
The photovoltaic grid-connected special cabinet with the structure is characterized in that a left side plate assembly and a right side plate assembly of the shell can be detached and separated, distribution and assembly are conveniently carried out in the main cabinet body, a current transformer is arranged on an electric appliance plate in a metering bin and used for detecting a current value in a power grid, necessary feedback is provided for a photovoltaic power generation system, an electric energy meter is arranged on the instrument plate and used for measuring the electric power degree of the photovoltaic power generation system injected into the power grid, and electric energy metering is realized; a circuit breaker and an anti-islanding device are arranged in the circuit breaker bin, the anti-islanding device is arranged between the back surface of the first rectangular plate and the upper half part of the second rectangular plate, and the circuit breaker is arranged in the second rectangular plate; the photovoltaic inverter, the power protection switch, the PLC and the temperature sensor are arranged in the composite bin, the photovoltaic inverter converts direct current emitted by the photovoltaic panel into alternating current suitable for an alternating current power grid, the power protection switch ensures safe connection between a photovoltaic power generation system and the power grid through the protection switch, the PLC is used for controlling and coordinating power equipment to ensure normal operation of the photovoltaic power generation system and the power grid, and the temperature sensor is used for adjusting the running state of the system through detecting the temperature of the photovoltaic module and then through a fan on the fan seat; the low-voltage anti-island device is arranged in the anti-island bin and consists of an operation switch, a resistor, an inductor or a capacitor and other disturbance loads, and when the power grid is in power failure and island phenomenon occurs, the power grid side of the photovoltaic system is electrified. And the electric power overhauling personnel judges whether the island phenomenon occurs or not by detecting whether the point is electrified or not. If the island phenomenon occurs, the low-voltage anti-island device is manually put into the on-site maintainer. The power balance between the output force and the load of the distributed photovoltaic power generation is changed, the output voltage and the output frequency of the distributed photovoltaic power generation are disturbed, overvoltage and undervoltage or overvoltage and underfrequency protection actions are caused, and island operation of the distributed photovoltaic power generation can be damaged. Through anti island storehouse, open circuit storehouse and compound storehouse through a plurality of fan seat intercommunication in proper order, at temperature regulation and control's in-process, the fan on the fan seat is taken out the air in the anti island storehouse into open circuit storehouse in, will open circuit the space in the storehouse and inhale in the compound storehouse in the lump to finally with the air discharge from the air vent on the bottom plate in the lump, the fan can be added again to the ventilation seat that is equipped with on the left bottom plate again, assists the effect of accelerating convection.
Further, the metering group board also comprises a base group board and an instrument board, wherein the base group board comprises a connecting seat and an electric appliance board, the connecting seat is connected to the left cover plate, the side surface of the electric appliance board is rotatably connected to the connecting seat, and the electric appliance board is detachably connected to the first rectangular plate; the instrument board is arranged below the electric appliance board, and the lower end of the instrument board is connected with the lower end of the first rectangular board.
Further, the composite group board further comprises a fixed group board, the fixed group board comprises two groups of fixing seats and fixing beams, the two groups of fixing seats are arranged on the bottom plate in parallel, two ends of each fixing beam are detachably connected to the corresponding fixing seats, and fixing rings are arranged on the fixing beams and correspond to the wire outlet holes.
Compared with the prior art, the invention has the advantages that: through separately setting up measurement storehouse, circuit breaker storehouse and compound storehouse, install current transformer, the electric energy meter, the circuit breaker, anti-islanding device, photovoltaic inverter, power protection switch, PLC controller and temperature sensor, make this special cabinet of photovoltaic grid-connected play most basic power distribution, electric energy measurement, protection control's function, again at anti-islanding device of low pressure that has been equipped with in the storehouse of anti-islanding, the anti-islanding that appears when a plurality of photovoltaic inverter are incorporated into the power networks simultaneously can be avoided, fan seat and ventilation seat's setting simultaneously, install the fan, be used for taking out the air in the anti-islanding storehouse into in the circuit breaker storehouse, inhale the compound storehouse in the space in the circuit breaker storehouse in the lump, and finally discharge the air from the air vent on the bottom plate in the lump, make to realize convection ventilation cooling under the separately setting up intercommunication of the storehouse body ensure that special cabinet internal device can steady operation.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a top left perspective view of the present invention;
FIG. 2 is a top right perspective view of the present invention;
FIG. 3 is a schematic diagram of a front-view explosion of the present invention;
FIG. 4 is a schematic rear-view exploded view of the present invention;
FIG. 5 is a top view of the present invention;
fig. 6 is a cross-sectional view A-A of fig. 5 in accordance with the present invention.
Wherein: 1. a housing; 11. a bottom plate; 111. a wire outlet hole; 12. a left side panel assembly; 121. a left bottom plate; 1211. a ventilation seat; 122. a left upright post; 123. a left cover plate; 13. a right side plate assembly; 131. a right bottom plate; 1311. an access opening; 132. a right column; 133. a right cover plate; 14. a top plate; 15. a back plate; 151. a vent hole; 2. a front plate assembly; 21. metering group boards; 211. a first rectangular plate; 2111. a through hole; 212. a first cover plate; 213. a base panel; 2131. a connecting seat; 2132. an electric board; 214. an instrument panel; 22. short circuit group board; 221. a second rectangular plate; 2211. a fan base; 222. a second cover plate; 23. composite assembly plates; 231. a wire guide plate; 232. a third cover plate; 233. a wire lumen; 234. fixing the assembly plate; 2341. a fixing seat; 2342. a fixed beam; 2343. a fixing ring; 3. a metering bin; 4. a breaking bin; 5. a composite bin; 6. anti-islanding group plates; 61. a curved plate; 62. an anti-islanding bin.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the invention, are within the scope of the invention.
Specific embodiments of the present invention will be described below with reference to the accompanying drawings:
as shown in fig. 1-6, a multi-protection special photovoltaic grid-connected cabinet comprises a main cabinet body, wherein the main cabinet body is provided with a shell 1 and a front plate assembly 2, the front plate assembly 2 divides the interior of the shell 1 into a metering bin 3, a breaking bin 4, a composite bin 5 and an anti-island bin 62, the metering bin 3, the breaking bin 4 and the composite bin 5 are sequentially connected, the metering bin 3, the breaking bin 4 and the composite bin 5 are respectively communicated with a front end panel of the shell 1, the anti-island bin 62 is arranged in the composite bin 5, and the anti-island bin 62 is communicated with the breaking bin 4.
The shell 1 is composed of a rectangular bottom plate 11 which is bent on four sides, a left side plate assembly 12 and a right side plate assembly 13 which are arranged on two sides of the bottom plate 11 and fixedly connected with the bottom plate 11, a top plate 14 which is arranged above the left side plate assembly 12 and the right side plate assembly 13 and fixedly connected with the upper ends of the left side plate assembly 12 and the right side plate assembly 13, and a back plate 15 which is arranged behind the bottom plate 11 and fixedly connected with the bottom plate 11, the left side plate assembly 12, the right side plate assembly 13 and the top plate 14 respectively;
the left side plate assembly 12 comprises a left bottom plate 121, a left upright post 122 and a left cover plate 123, wherein the upper end and the lower end of the left bottom plate 121 and the left cover plate 123 are respectively connected with the top plate 14 and the bottom plate 11, and the left upright post 122 is connected to the overlapping part of the left bottom plate 121 and the left cover plate 123; the right side plate assembly 13 comprises a right bottom plate 131, a right upright post 132 and a right cover plate 133, wherein the upper end and the lower end of the right bottom plate 131 and the right cover plate 133 are respectively connected with the top plate 14 and the bottom plate 11, and the right upright post 132 is connected to the overlapping part of the right bottom plate 131 and the right cover plate 133.
The front plate assembly 2 is composed of a metering group plate 21, a circuit breaking group plate and a composite group plate 23; the metering group plate 21 comprises a first rectangular plate 211 and a first cover plate 212, the upper end of the first rectangular plate 211 is connected with the top plate 14, the side surface of the first rectangular plate 211 is respectively connected with the left cover plate 123 and the right cover plate 133, the first rectangular plate 211 and the top plate 14 are enclosed to form a metering bin 3, and the first cover plate 212 is covered at an opening of the metering bin 3; the circuit breaking group plate comprises a second rectangular plate 221 and a second cover plate 222, the back surface of the second rectangular plate 221 is respectively connected with the left upright post 122 and the right upright post 132, the second rectangular plate 221, the top plate 14 and the first rectangular plate 211 are enclosed to form a circuit breaking bin 4, and the second cover plate 222 is covered at an opening of the circuit breaking bin 4; the composite set of plates 23 comprises two sets of wire guide plates 231 and a third cover plate 232, the upper and lower ends of the two sets of wire guide plates are respectively connected with a second rectangular plate 221 and a bottom plate 11, the two sets of wire guide plates are respectively parallel to a left cover plate 123 and a right cover plate 133, the two sets of wire guide plates, the second rectangular plate 221, the back plate 15 and the bottom plate 11 are enclosed to form a composite bin 5, the third cover plate 232 covers the opening of the composite bin 5, and a wire guide cavity 233 communicated with the open-circuit bin 4 is formed between the two sets of wire guide plates 231 and the left cover plate 123/the right cover plate 133;
a through hole 2111 is formed at the bottom of the first rectangular plate 211, and the through hole 2111 is communicated with the wire cavity 233; the back of the second rectangular plate 221 is provided with a plurality of fan seats 2211, and the breaking bin 4 and the compound bin 5 are communicated through the plurality of fan seats 2211; the bottom plate 11 is provided with a wire outlet 111; the back plate 15 is provided with a vent hole 151, and the vent hole 151 is disposed at the lower end of the back plate 15.
The main cabinet body is further provided with an anti-island group plate 6, the anti-island group plate 6 comprises a curved plate 61, the upper end of the Qu Xingban 61 is connected with the top plate 14, the two sides of the Qu Xingban 61 are respectively connected with the left bottom plate 121 and the right bottom plate 131, the lower end of the Qu Xingban 61 is connected with the second rectangular plate 221, the Qu Xingban, the top plate 14 and the second rectangular plate 221 are enclosed to form an anti-island cabin 62, and the anti-island cabin 62, the circuit breaker cabin 4 and the composite cabin 5 are sequentially communicated through a plurality of fan seats 2211; the left bottom plate 121 is provided with a ventilation seat 1211, the right bottom plate 131 is provided with an access hole 1311, and the ventilation seat 1211 and the access hole 1311 are both communicated with the anti-islanding bin 62.
Further, the metering group board 21 further includes a base group board 213 and an instrument board 214, the base group board 213 includes a connection seat 2131 and an electrical board 2132, the connection seat 2131 is connected to the left cover plate 123, the side surface of the electrical board 2132 is rotatably connected to the connection seat 2131, and the electrical board 2132 is detachably connected to the first rectangular board 211; the instrument panel 214 is disposed below the electric panel 2132 and the lower end of the instrument panel 214 is connected to the lower end of the first rectangular plate 211.
Further, the composite set plate 23 further includes a fixing set plate 234, the fixing set plate 234 includes two sets of fixing bases 2341 and fixing beams 2342, the two sets of fixing bases 2341 are parallel to each other and are arranged on the base plate 11, two ends of each fixing beam 2342 are detachably connected to the fixing bases 2341, fixing rings 2343 are arranged on the fixing beams 2342, and the fixing rings 2343 correspond to the wire outlet holes 111.
Description of the working mode of the invention:
the photovoltaic grid-connected special cabinet adopting the structure can be detached and separated, the left side plate assembly 12 and the right side plate assembly 13 of the shell 1 are convenient to distribute and assemble in the main cabinet body, the electric appliance plate 2132 in the metering bin 3 is provided with a current transformer for detecting a current value in a power grid and providing necessary feedback for a photovoltaic power generation system, the electric appliance plate 2132 can rotate on the connecting seat 2131 and can perform position conversion before assembly so as to facilitate distribution of technicians, and the instrument plate 214 is provided with an electric energy meter for measuring the electric power degree of the photovoltaic power generation system injected into the power grid and realizing electric energy metering; a circuit breaker and an anti-islanding device are installed in the circuit breaking bin 4, the anti-islanding device is installed between the back surface of the first rectangular plate 211 and the upper half part of the second rectangular plate 221, and the circuit breaker is installed in the second rectangular plate 221; the photovoltaic inverter, the power protection switch, the PLC controller and the temperature sensor are installed in the composite bin 5, the photovoltaic inverter converts direct current emitted by the photovoltaic panel into alternating current suitable for an alternating current power grid, the power protection switch ensures safe connection between a photovoltaic power generation system and the power grid through the protection switch, an outgoing line end of the power supply can be fastened through a fixing ring 2343 on a fixing beam 2342, the outgoing line end penetrates out through an outgoing line hole 111, the PLC controller is used for controlling and coordinating power equipment to ensure normal operation of the photovoltaic power generation system and the power grid, and the temperature sensor detects the temperature of the photovoltaic module and adjusts the running state of the system through a fan on a fan seat 2211; the wire connection among the metering bin 3, the breaking bin 4 and the compound bin 5 is threaded through the through hole 2111 and the wire cavity 233; the anti-island cabin 62 is internally provided with a low-voltage anti-island device, which is composed of an operation switch, a disturbance load such as a resistor, an inductor or a capacitor, and when the power grid is in power failure and island phenomenon occurs, the power grid side of the photovoltaic system is electrified. And the electric power overhauling personnel judges whether the island phenomenon occurs or not by detecting whether the point is electrified or not. If the island phenomenon occurs, the low-voltage anti-island device is manually put into the on-site maintainer. The power balance between the output force and the load of the distributed photovoltaic power generation is changed, the output voltage and the output frequency of the distributed photovoltaic power generation are disturbed, overvoltage and undervoltage or overvoltage and underfrequency protection actions are caused, and island operation of the distributed photovoltaic power generation can be damaged. Through anti island storehouse 62, circuit breaker storehouse 4 and compound storehouse 5 through a plurality of fan seat 2211 intercommunication in proper order, at temperature regulation and control's in-process, the fan on the fan seat 2211 draws the air in the anti island storehouse 62 into circuit breaker storehouse 4 in, again with the space in the circuit breaker storehouse 4 in the compound storehouse 5 of inhaling together to finally with the air discharge from the air vent 151 on the bottom plate 11 together, the fan can be added again to the ventilation seat 1211 that is equipped with on left bottom plate 121 again, assisted with the effect of accelerating convection.
The invention has the beneficial effects that: through separately arranged metering bin 3, circuit breaker bin 4 and compound bin 5, install current transformer, electric energy meter, the circuit breaker, anti-islanding device, photovoltaic inverter, power protection switch, PLC controller and temperature sensor, make this special cabinet of photovoltaic grid-connected play the most basic power distribution, electric energy metering, protection control's function, again be equipped with the anti-islanding device of low pressure in anti-islanding bin 62, can avoid the anti-islanding inefficacy that appears when a plurality of photovoltaic inverters are incorporated into the power networks simultaneously, fan seat 2211 and ventilation seat 1211's setting simultaneously, install the fan, be used for drawing out the air in the anti-islanding bin 62 into circuit breaker bin 4, draw in the compound bin 5 together with the space in the circuit breaker bin 4 again, and finally discharge the air from the air vent 151 on bottom plate 11 together, make realize convection ventilation cooling under the separately set up intercommunication of the storehouse body ensure that special device can steady operation.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. A multi-protection special photovoltaic grid-connected cabinet is characterized in that: including the main cabinet body, the main cabinet body is equipped with shell and front bezel subassembly, front bezel subassembly is measuring storehouse, the storehouse of opening circuit, compound storehouse and anti-island storehouse with shell internal partition, measuring storehouse, the storehouse of opening circuit and compound storehouse connect gradually, measuring storehouse, the storehouse of opening circuit and compound storehouse communicate the front end panel of shell respectively, anti-island storehouse sets up in compound storehouse, anti-island storehouse and the storehouse intercommunication of opening circuit.
2. The multi-protected photovoltaic grid-tie cabinet of claim 1, wherein: the shell consists of a rectangular bottom plate with four sides bent, a left side plate assembly and a right side plate assembly which are arranged on two sides of the bottom plate and fixedly connected with the bottom plate, a top plate which is arranged above the left side plate assembly and the right side plate assembly and fixedly connected with the upper ends of the left side plate assembly and the right side plate assembly, and a back plate which is arranged behind the bottom plate and fixedly connected with the bottom plate, the left side plate assembly, the right side plate assembly and the top plate assembly respectively;
the left side plate assembly comprises a left bottom plate, a left upright post and a left cover plate, the upper end and the lower end of the left bottom plate and the upper end and the lower end of the left cover plate are respectively connected with the top plate and the bottom plate, and the left upright post is connected to the overlapping part of the left bottom plate and the left cover plate; the right side plate assembly comprises a right bottom plate, a right upright post and a right cover plate, wherein the upper end and the lower end of the right bottom plate and the right cover plate are respectively connected with the top plate and the bottom plate, and the right upright post is connected to the overlapping part of the right bottom plate and the right cover plate.
3. The multi-protected photovoltaic grid-tie cabinet of claim 2, wherein: the front plate assembly consists of a metering group plate, a circuit breaking group plate and a composite group plate; the metering group plate comprises a first rectangular plate and a first cover plate, the upper end of the first rectangular plate is connected with the top plate, the side face of the first rectangular plate is respectively connected with the left cover plate and the right cover plate, the first rectangular plate and the top plate are enclosed to form a metering bin, and the first cover plate is covered at an opening of the metering bin; the circuit breaking group plate comprises a second rectangular plate and a second cover plate, the back surface of the second rectangular plate is connected with the left upright post and the right upright post respectively, the second rectangular plate, the top plate and the first rectangular plate are enclosed to form a circuit breaking bin, and the second cover plate is covered at an opening of the circuit breaking bin; the composite group board comprises two groups of wire guide boards and a third cover board, the upper end and the lower end of the two groups of wire guide boards are respectively connected with a second rectangular board and a bottom board, the two groups of wire guide boards are respectively parallel to a left cover board and a right cover board, the two groups of wire guide boards, the second rectangular board, the back board and the bottom board are enclosed to form a composite bin, the third cover board is covered at an opening of the composite bin, and a wire guide cavity communicated with the open-circuit bin is formed between the two groups of wire guide boards and the left cover board/the right cover board;
the bottom of the first rectangular plate is provided with a through hole, and the through hole is communicated with the wire cavity; the back of the second rectangular plate is provided with a plurality of fan seats, and the open-circuit bin and the composite bin are communicated through the fan seats; and the bottom plate is provided with a wire outlet hole.
4. A multi-protected photovoltaic grid-tie cabinet according to claim 3, characterized in that: the main cabinet body is also provided with an anti-island group board, the anti-island group board comprises a curved board, the upper end of the curved board is connected with a top board, the two sides of the curved board are respectively connected with a left bottom board and a right bottom board, the lower end of the curved board is connected with a second rectangular board, qu Xingban, the top board and the second rectangular board enclose to form an anti-island cabin, and the anti-island cabin, the open-circuit cabin and the composite cabin are sequentially communicated through a plurality of fan seats.
5. The multi-protected photovoltaic grid-tie cabinet of claim 4, wherein: the left bottom plate is provided with a ventilation seat, the right bottom plate is provided with an access hole, and the ventilation seat and the access hole are communicated with the anti-island cabin.
6. A multi-protected photovoltaic grid-tie cabinet according to claim 3, characterized in that: the metering group board further comprises a base group board, the base group board comprises a connecting seat and an electric appliance board, the connecting seat is connected to the left cover plate, the side face of the electric appliance board is rotatably connected to the connecting seat, and the electric appliance board is detachably connected to the first rectangular plate.
7. The multi-protected photovoltaic grid-tie cabinet of claim 6, wherein: the metering group board also comprises an instrument board, wherein the instrument board is arranged below the electric appliance board, and the lower end of the instrument board is connected with the lower end of the first rectangular board.
8. A multi-protected photovoltaic grid-tie cabinet according to claim 3, characterized in that: the composite group board further comprises a fixed group board, the fixed group board comprises two groups of fixing seats and fixing beams, the two groups of fixing seats are arranged on the bottom plate in parallel, two ends of each fixing beam are detachably connected to the corresponding fixing seats, and fixing rings are arranged on the fixing beams and correspond to the wire outlet holes.
9. A multi-protected photovoltaic grid-tie cabinet according to claim 3, characterized in that: the backboard is provided with a vent hole, and the vent hole is arranged at the lower end of the backboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410050642.6A CN117767134A (en) | 2024-01-12 | 2024-01-12 | Multi-protection photovoltaic grid-connected special cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410050642.6A CN117767134A (en) | 2024-01-12 | 2024-01-12 | Multi-protection photovoltaic grid-connected special cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117767134A true CN117767134A (en) | 2024-03-26 |
Family
ID=90310833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410050642.6A Pending CN117767134A (en) | 2024-01-12 | 2024-01-12 | Multi-protection photovoltaic grid-connected special cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117767134A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201444551U (en) * | 2009-06-29 | 2010-04-28 | 青岛特锐德电气股份有限公司 | Safety protection device for movable switch cabinet |
| CN104269766A (en) * | 2014-10-23 | 2015-01-07 | 何华斌 | Miniaturized switch cabinet of handcart type |
-
2024
- 2024-01-12 CN CN202410050642.6A patent/CN117767134A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201444551U (en) * | 2009-06-29 | 2010-04-28 | 青岛特锐德电气股份有限公司 | Safety protection device for movable switch cabinet |
| CN104269766A (en) * | 2014-10-23 | 2015-01-07 | 何华斌 | Miniaturized switch cabinet of handcart type |
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| Title |
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| "KYN28-12二代平顶柜", Retrieved from the Internet <URL:https://www.mfcad.com/tuzhi/banjin/6030/407144.html> * |
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