CN218648782U - Photovoltaic shutoff device - Google Patents
Photovoltaic shutoff device Download PDFInfo
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- CN218648782U CN218648782U CN202222325907.8U CN202222325907U CN218648782U CN 218648782 U CN218648782 U CN 218648782U CN 202222325907 U CN202222325907 U CN 202222325907U CN 218648782 U CN218648782 U CN 218648782U
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- photovoltaic
- controller
- shut
- inverter
- photovoltaic panel
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Abstract
The utility model discloses a photovoltaic shutoff device, which comprises a controller, a plurality of photovoltaic panels and a plurality of shutoff devices, wherein one end of the controller is connected with the plurality of photovoltaic panels in series, and one photovoltaic panel is used for supplying power to the controller; a shutoff device is arranged between the adjacent photovoltaic panels, the shutoff device is electrically connected with the photovoltaic panels, and the shutoff device is used for cutting off direct current and communicating alternating current; the photovoltaic panel and the shutoff device are connected to one end of the inverter in series, and the other end of the inverter is connected to the controller and the photovoltaic panel.
Description
Technical Field
The utility model relates to a distributed photovoltaic technology field, more specifically relates to a photovoltaic shutoff device.
Background
Solar energy is increasingly gaining attention as a clean energy source. With the further reduction of the photovoltaic power generation cost, the installed capacity of the photovoltaic power generation also presents a situation of explosive growth.
At present, a photovoltaic power generation system generally adopts a group series structure, photovoltaic panels after series connection can form kilovolt direct current high voltage, and safety risks can be formed on personnel under the conditions of maintenance, fire protection and the like, so that some countries and regions have already come out of relevant standards, the photovoltaic power generation system is required to support a component-level quick turn-off function, high direct current voltage is avoided under the conditions of fire protection, maintenance and the like, and potential safety hazards are eliminated.
The existing assembly turn-off technology is not provided with a photovoltaic panel, energy can not be stored through the photovoltaic panel, a controller is controlled to be started through electric energy of the photovoltaic panel, power needs to be supplied in real time through an external alternating current power supply, and the problems that the use cost is high and the efficiency is low are caused.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one technical problem, the utility model provides a photovoltaic shutoff device.
The utility model discloses the first aspect provides a photovoltaic shutoff, include: controller, a plurality of photovoltaic boards and a plurality of turn-off devices
One end of the controller is connected with a plurality of photovoltaic panels in series, wherein one photovoltaic panel is used for supplying power to the controller;
a shutoff device is arranged between the adjacent photovoltaic panels, the shutoff device is electrically connected with the photovoltaic panels, and the shutoff device is used for cutting off direct current and communicating alternating current;
the photovoltaic panel and the shutoff device are connected to one end of the inverter in series, and the other end of the inverter is connected to the controller and the photovoltaic panel.
In a preferred embodiment of the present invention, 3-5 diodes are serially connected inside the photovoltaic panel.
The utility model discloses a preferred embodiment, the controller adopts time control, and photovoltaic circuit starts closed circuit before the sun rises, also can gather control photovoltaic board voltage, starts the ware that closes when voltage reaches inverter starting voltage.
In a preferred embodiment of the present invention, the shutoff device is provided with a temperature sensor or a temperature fuse.
In a preferred embodiment of the present invention, the shutdown device turns off the circuit when the temperature is greater than 85 ℃.
In a preferred embodiment of the present invention, the switch-off device is connected to the high-voltage capacitor through an electromagnetic relay to switch on the alternating current.
In a preferred embodiment of the present invention, the controller is provided with a switch, and the switch can manually close the controller.
In a preferred embodiment of the present invention, the controller controls the start-up by the electric energy of the photovoltaic panel at the start-up stage of the inverter.
Compared with the prior art, the technical scheme of the utility model have following advantage:
(1) The control circuit of this application adopts the photovoltaic system circuit, and system wiring is simple. The cost is reduced, the efficiency is improved, and the failure rate is reduced.
(2) This application does not need signal transmission and receiving equipment, and the shutoff device can rely on photovoltaic system self current to reduce when 0, and the shutoff device cuts off.
(3) The controller of this application does not need outside alternating current power supply, only need use the photovoltaic board produce the electric energy can, make things convenient for the installation and the use of system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that some drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without creative efforts for those skilled in the art.
Fig. 1 is a photovoltaic shutoff wiring diagram in the embodiment of the present invention.
1. A shutoff device 2, a photovoltaic panel 3, a controller 4, a diode 5 and an inverter.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example one
Referring to fig. 1, the utility model provides a photovoltaic shutoff device, include: controller 3, a plurality of photovoltaic panels 2 and a plurality of shutoff devices 1
One end of the controller 3 is connected with a plurality of photovoltaic panels 2 in series, wherein one photovoltaic panel 2 is used for supplying power to the controller 3;
a shutoff device 1 is arranged between the adjacent photovoltaic panels 2, the shutoff device 1 is electrically connected with the photovoltaic panels 2, and the shutoff device 1 is used for cutting off direct current and communicating alternating current;
the photovoltaic panel automatic shutdown system further comprises an inverter 5, the photovoltaic panels 2 and the shutdown device 1 are connected to one end of the inverter 5 in series, the other end of the inverter 5 is connected to the controller 3 and the photovoltaic panels 2, and in the startup stage of the inverter 5, the controller 3 is controlled to be started through electric energy of the photovoltaic panels 2.
Further, the shutdown device 1 may shut off direct current, but allow alternating current to pass through, in a shutdown state, the controller 3 may supply power to the shutdown device 1 in a pulsed electricity manner, after all the shutdown devices 1 are closed, the controller becomes a direct current power supply to keep the shutdown device 1 closed, and when the alternating current or direct current of an external circuit disappears, the shutdown device 1 is in an open state when power is lost.
Further, before the inverter 5 is started, the shutdown device 1 is in a shutdown state, the external controller 3 supplies power to the shutdown device 1 through alternating current, after all the shutdown device 1 is switched to direct current to supply power to the shutdown device 1 after the inverter 5 is started, power is supplied by an external power source, only the current of a photovoltaic system is needed to supply power, when an emergency occurs, the inverter 5 is shut down, the current in the system disappears, and the shutdown device 1 is in a shutdown state.
Further, 3-5 diodes 4 are arranged in the photovoltaic panel 2 in series, the controller 3 adopts time control, the photovoltaic circuit starts a closed circuit before the sun rises, the voltage of the photovoltaic panel 2 can also be collected and monitored, and the shutoff device 1 is started when the voltage reaches the starting voltage of the inverter 5.
In other words, the dc-side controller 3 can also add ac or dc power via the circuits of the photovoltaic system and the photovoltaic power station. The controller 3 needs electric energy from one or two photovoltaic cell assemblies and is provided with a main switch which can be manually closed. Powering the photovoltaic array may be done individually for each string of array assemblies.
Further, the controller 3 uses the energy of the photovoltaic panel 2 only in the initial startup phase of the inverter 5, and after the startup of the inverter 5 is completed, the controller 3 will not provide energy to the shutdown device 1. The controller 3 itself can also switch off the photovoltaic panel 2 to which it is connected.
The direct current can be cut off in the shutoff device 1, but the alternating current is allowed to pass through, the shutoff device 1 is switched on, the shutoff device 1 can be powered by the alternating current or the direct current after being switched on, and then the shutoff device 1 is switched to be powered by the direct current with small current after being switched on.
The shutoff device 1 can adopt the mode of an electromagnetic relay and a high-voltage capacitor besides adopting an electronic circuit design, alternating current can pass through the capacitor to close a relay contact, after the closed photovoltaic inverter 5 is started, the current of a photovoltaic cable flows through a magnet coil, and the generated magnetic field ensures that the relay is closed.
The controller 3 of the relay can adopt time control, a photovoltaic circuit starts a closed circuit before the sun rises, and can also collect and monitor the voltage of the photovoltaic panel 2, and the shutoff device 1 is started when the voltage reaches the starting voltage of the inverter 5.
Further, a temperature sensor or a temperature fuse is arranged on the shutoff device 1, and when the temperature is higher than 85 ℃, the shutoff device 1 turns off the circuit.
Further, the shutoff device 1 conducts alternating current by adopting a mode that an electromagnetic relay is connected with a high-voltage capacitor.
Further, a switch is arranged on the controller and can be used for manually closing the controller.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A photovoltaic shutdown, comprising: controller, a plurality of photovoltaic boards and a plurality of turn-off devices
One end of the controller is connected with a plurality of photovoltaic panels in series, wherein one photovoltaic panel is used for supplying power to the controller;
a cut-off device is arranged between the adjacent photovoltaic panels, the cut-off device is electrically connected with the photovoltaic panels, and the cut-off device is used for cutting off direct current and communicating alternating current;
the photovoltaic panel and the shut-off device are connected to one end of the inverter in series, and the other end of the inverter is connected to the controller and the photovoltaic panel;
and in the inverter starting stage, the controller controls the starting through the electric energy of the photovoltaic panel.
2. A photovoltaic shutdown device as claimed in claim 1, characterized in that 3-5 diodes are arranged in series inside the photovoltaic panel.
3. A photovoltaic shut-off device as claimed in claim 1, wherein the controller is time controlled, the photovoltaic circuit is adapted to activate the closed circuit before the sun rises, and also to monitor the voltage across the photovoltaic panel, and to activate the shut-off device when the voltage reaches the inverter activation voltage.
4. A photovoltaic shut-off device according to claim 1, characterised in that a temperature sensor or a temperature fuse is arranged on the shut-off device.
5. A photovoltaic shut-off device according to claim 4, characterised in that the shut-off device switches off the circuit when the temperature is above 85 degrees Celsius.
6. A photovoltaic shut-off device according to claim 1, characterized in that the shut-off device is adapted to conduct alternating current by means of an electromagnetic relay connected to a high-voltage capacitor.
7. A photovoltaic shut-off device as claimed in claim 6, wherein the controller is provided with a switch which enables the controller to be manually switched off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222325907.8U CN218648782U (en) | 2022-09-01 | 2022-09-01 | Photovoltaic shutoff device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222325907.8U CN218648782U (en) | 2022-09-01 | 2022-09-01 | Photovoltaic shutoff device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218648782U true CN218648782U (en) | 2023-03-17 |
Family
ID=85490578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222325907.8U Active CN218648782U (en) | 2022-09-01 | 2022-09-01 | Photovoltaic shutoff device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218648782U (en) |
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2022
- 2022-09-01 CN CN202222325907.8U patent/CN218648782U/en active Active
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