Shut-down system and control method for photovoltaic power optimizer

Abstract

The application discloses a kind of photovoltaic power optimizers of shutdown system, including photovoltaic power optimizer and first controller;Shutdown system further includes control module, control module is electrically connected with first controller, control module is further connected with photovoltaic power optimizer communication;Shutdown system is further communicated with second controller by control module, control module can also be started or stopped photovoltaic power optimizer in response to the touch operation of second controller;In the case where control module is controlled photovoltaic power optimizer disconnect in response to the touch operation of first controller, the control of second controller to photovoltaic power optimizer is set to invalid state;In the case where first controller is in closed state, control module can be controlled photovoltaic power optimizer between start and stop switching in response to the touch operation of second controller.By the above setting, it can guarantee the shutdown reliability of photovoltaic power optimizer, and solve the harm caused by remote control end misoperation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic modules, in particular to a shutdown system and control method suitable for photovoltaic power optimizers. BACKGROUND

[0002] Under the background of "double carbon", the installed capacity of photovoltaic power is rising exponentially. With the expansion of the installed capacity of photovoltaic power, photovoltaic safety is a pain point. How to solve the danger brought by high-voltage direct current is a difficult problem that must be faced in the future. In the prior art, each solar panel of a photovoltaic product is equipped with a shutdown device, which is a common way to solve the problem of high-voltage direct current. Therefore, how to effectively and reliably implement the shutdown instruction is a very key technical point.

[0003] In the traditional technical solution, the photovoltaic product is susceptible to external interference, resulting in unstable and unreliable transmission of the shutdown instruction, and there is no reliable guarantee mechanism, which can easily cause false operation or the problem that the optimizer cannot respond.

[0004] Specifically, the photovoltaic product generally issues a shutdown instruction in a wired communication or wireless communication manner to control the shutdown of the optimizer. The traditional wired communication includes RS485 communication, CAN communication, and power line carrier PLC communication. If the optimizer is controlled to shut down through RS485 communication or CAN communication, although the communication method is simple, a communication network needs to be laid to increase the construction cost. If the optimizer is controlled to shut down through power line carrier PLC communication, although the communication line can be saved and information communication can be realized with the power line, in the direct current system line, the ground capacitance is large, the filtering effect is large, the carrier signal decays quickly with distance, and increasing the transmission power will affect the power generation efficiency, and at the same time, the PLC communication is seriously interfered by the external environment.

[0005] Although wireless communication can solve the problems of cost and stability of the transmission of the shutdown instruction, there is no reliable and effective guarantee mechanism for the shutdown operation of the optimizer, and there is no processing method for false operation. SUMMARY

[0006] In order to solve the problems of the prior art, the purpose of the present application is to provide a shutdown system and control method suitable for photovoltaic power optimizers, which can solve the problem that the shutdown operation of the optimizer has no reliable and effective guarantee mechanism.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solution:

[0008] The application discloses a shutdown system suitable for a photovoltaic power optimizer, which comprises the photovoltaic power optimizer, a first controller used for controlling the closing or opening of the photovoltaic power optimizer, a control module electrically connected with the first controller and communicatively connected with the photovoltaic power optimizer, the control module being capable of starting or stopping the photovoltaic power optimizer in response to a touch operation of the first controller, the shutdown system further being communicatively connected with a second controller through the control module, the control module being capable of starting or stopping the photovoltaic power optimizer in response to a touch operation of the second controller, the control of the photovoltaic power optimizer by the second controller being set to an invalid state in the case that the control module controls the photovoltaic power optimizer to be opened in response to the touch operation of the first controller, and the control module being capable of controlling the photovoltaic power optimizer to switch between starting and stopping in response to the touch operation of the second controller in the case that the first controller is in a closed state.

[0009] Further, the second controller is communicatively connected with the control module through a cloud server, the second controller being capable of sending a control signal to the control module through the cloud server, and the control module being capable of starting or stopping the photovoltaic power optimizer in response to the control signal.

[0010] Further, the first controller is at least one of a key, a dial key and a rotating knob, and a wired connection is arranged between the first controller and the control module; the second controller comprises at least one of a mobile terminal and a fixed terminal, and a wireless connection is arranged between the second controller and the control module.

[0011] Further, the control module is a gateway, and the shutdown system is capable of being networked with the second controller and / or the cloud server through the control module.

[0012] Further, the control module stores a first preset time and a second preset time, the second preset time being set to be greater than the first preset time; in the case that the first controller and / or the second controller is in an opened state, the control module is capable of controlling the photovoltaic power optimizer to stop working and setting the shutdown system to a patrol state within the first preset time to the second preset time.

[0013] Further, the patrol state is set to be that the control module sequentially detects whether the photovoltaic power optimizer is stopped, and if the control module detects that the photovoltaic power optimizer is still started, the control module acquires data information of the photovoltaic power optimizer and uploads the data information to the cloud server.

[0014] Further, in the case that the shutdown system is in the patrol state, the patrol operation of the control module on the photovoltaic power optimizer is set to be at least twice.

[0015] A control method of a shutdown system suitable for a photovoltaic power optimizer, comprising:

[0016] S1, the control module acquires the control signal sent by the first controller and / or the second controller;

[0017] S2, the control module controls the photovoltaic power optimizer to start or stop according to the priority of the control signal;

[0018] Step S2 further comprises:

[0019] S21, the control module determines the source of the control signal first, if the control signal comes from the first controller, the photovoltaic power optimizer starts or stops in response to the touch operation of the first controller;

[0020] S22, if the control signal comes from the second controller, the control module determines the state of the first controller first, if the first controller is in the off state, the touch operation of the second controller is in the invalid state;

[0021] S23, if the control signal comes from the second controller, and the first controller is in the closed state, the photovoltaic power optimizer can start or stop in response to the touch operation of the second controller.

[0022] Further, the control method further comprises:

[0023] S3, the control module can generate a shutdown instruction based on the control signal and transmit it to the photovoltaic power optimizer, within the first preset time after the photovoltaic power optimizer acquires the shutdown instruction, the photovoltaic power optimizer stops working; between the first preset time and the second preset, the shutdown system is in the inspection state.

[0024] Further, step S3 further comprises:

[0025] S31, in the inspection state, the control module can detect whether the photovoltaic power optimizer stops working;

[0026] S32, the control module marks the photovoltaic power optimizer that still keeps working as a first problem device;

[0027] S33, the control module sends the shutdown instruction to the first problem device again;

[0028] S34, the control module can also detect whether the first problem device stops working;

[0029] S35, the control module marks the first problem device that still keeps working as a second problem device;

[0030] S36, the control module uploads the data information of the second problem device to the cloud server.

[0031] By setting the first controller and the second controller, and setting the priority of the first controller to be greater than the priority of the second controller, the shutdown reliability of the photovoltaic power optimizer is ensured, and the harm caused by the misoperation of the remote control end is solved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A schematic diagram of the shutdown system in the embodiment of the present application.

[0033] Figure 2 A logic judgment diagram of the operation of the shutdown system in the embodiment of the present application.

[0034] Figure 3 A flow chart of the patrol state of the shutdown system in the embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the personnel in the art better understand the present application, the technical solutions in the specific embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application.

[0036] It should be noted that when an element is referred to as being “disposed on” another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being “connected” to another element, it can be directly connected to the other element or intervening elements can be present. The terms “vertical”, “horizontal”, “left”, “right”, and similar expressions as used herein are for illustrative purposes only and do not indicate the only orientation of the embodiments.

[0037] In the description of the present application, it should be understood that the terms “first”, “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein only for the purpose of describing specific embodiments and is not intended to limit the application. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0039] The present application provides a photovoltaic power optimizer as Figure 1The illustrated one is suitable for photovoltaic power optimizer shutdown system 100, shutdown system 100 includes photovoltaic power optimizer 11 and first controller 12, first controller 12 is used for controlling the start or stop of photovoltaic power optimizer 11.When the photovoltaic power station occurs abnormally, photovoltaic power optimizer 11 can stop outputting current in response to the touch operation of first controller 12, thereby ensuring that photovoltaic power optimizer 11 is quickly turned off, and reducing the loss of photovoltaic power station.

[0040] Specifically, the first controller 12 is set as at least one of a physical key, a dial key and a rotating knob, and the touch operation of the first controller 12 can switch the first controller 12 between the closed state and the disconnected state.When the first controller 12 is in the closed state, the photovoltaic power optimizer 11 starts and remains in the working state; when the first controller 12 is in the disconnected state, the photovoltaic power optimizer 11 stops, that is, the photovoltaic power optimizer 11 stops outputting current to the outside world.

[0041] As an implementation manner, the shutdown system 100 further comprises a control module 13, which can be set as a gateway, also known as an inter-network connector or a protocol converter.The control module 13 can realize network interconnection above the network layer.The control module 13 can be used for wide area network interconnection, and the control module 13 can also be used for local area network interconnection.It should be noted that the control module 13 is used to provide protocol conversion, routing, data exchange and other network compatibility functions when interworking between networks using different architectures or protocols.

[0042] Specifically, the control module 13 is set in wired connection with the first controller 12, and the control module 13 is in communication connection with the photovoltaic power optimizer 11.When the photovoltaic power station occurs abnormally, the first controller 12 is touched to switch the first controller 12 from the closed state to the disconnected state, and the control module 13 can control the photovoltaic power optimizer 11 to stop in response to the touch operation of the first controller 12, thereby avoiding damage to the photovoltaic power optimizer 11.It can be understood that after troubleshooting of the photovoltaic power station, the first controller 12 is touched to switch the first controller 12 from the disconnected state to the closed state, and the controller can control the photovoltaic power optimizer 11 to start in response to the touch operation of the first controller 12.

[0043] Further, the first controller 12 can communicate with a plurality of photovoltaic power optimizers 11 through the control module 13. That is, the first controller 12 can simultaneously control a plurality of photovoltaic power optimizers 11 to start or stop. Among them, the communication mode between the control module 13 and the photovoltaic power optimizer 11 is set as wireless communication, thereby saving the cost of communication lines, and the wireless communication mode is adopted to make the signal transmission between the first controller 12 and the photovoltaic power optimizer 11 more stable.

[0044] As shown in Figure 1 As an implementation, the shutdown system 100 further comprises a second controller 15, and the control module 13 is arranged in wireless communication connection with the second controller 15. The touch operation of the second controller 15 can switch the second controller 15 between the closed state and the open state. When the second controller 15 is in the closed state, the photovoltaic power optimizer 11 starts; when the second controller 15 is in the open state, the photovoltaic power optimizer 11 stops.

[0045] Specifically, the second controller 15 includes but is not limited to mobile terminals and fixed terminals. Among them, the mobile terminal can be a mobile phone, a tablet computer, a diagnostic instrument and the like; the fixed terminal can be a computer, a server and a console and the like.

[0046] Further, when the photovoltaic power station is abnormal, the second controller 15 can achieve basically the same control effect as the first controller 12, which will not be described here.

[0047] Through the above setting, the second controller 15 can quickly stop the output current of the photovoltaic power optimizer 11 to the outside world when the photovoltaic power station is abnormal, and the various control means of the photovoltaic power optimizer 11 can ensure the stability of the shutdown system 100. In addition, by setting the second controller 15, the worker can control the photovoltaic power optimizer 11 to stop at any position, thereby eliminating the distance restriction when controlling the photovoltaic power optimizer 11, shortening the accident rescue time, and effectively preventing the accident from spreading.

[0048] As an optional implementation, the shutdown system 100 is provided with the first controller 12 and the second controller 15. When the control module 13 obtains the control signal, the control module 13 will first judge the source of the control signal. Among them, the control signal can be sent by the first controller 12 or the second controller 15.

[0049] As shown in Figure 2 Specifically, when the photovoltaic power station is abnormal, the worker can control the photovoltaic power optimizer 11 to stop through the first controller 12 or the second controller 15. If the control module 13 judges that the control signal comes from the first controller 12, and the control module 13 judges that the first controller 12 is in the open state based on the control signal, the photovoltaic power optimizer 11 stops working. At this time, the photovoltaic power optimizer 11 is arranged to be unable to respond to the start or stop of the touch operation of the second controller 15.

[0050] Furthermore, if the control module 13 determines that the control signal comes from the second controller 15, the control module 13 preferentially determines whether the first controller 12 is in the closed state. If the first controller 12 is in the closed state, the control module 13 can control the photovoltaic power optimizer 11 to switch between starting and stopping in response to the control signal sent by the second controller 15.

[0051] It is understandable that in the above embodiment, if the control module 13 determines that the first controller 12 is in the disconnected state, even if the control signal comes from the second controller 15, the photovoltaic power optimizer 11 is configured to be unable to respond to the touch operation of the second controller 15 to start or stop.

[0052] Through the above-mentioned settings, the shutdown system 100 has a control logic dominated by the first controller 12. Since the first controller 12 and the control module 13 are set to be wired connected, and the second controller 15 and the control module 13 are set to be wireless communication connected, the above-mentioned settings make the shutdown system 100 more reliable and prevent the harm caused by the misoperation of the remote control of the second controller 15.

[0053] like Figure 1 As shown, as an implementation, the control module 13 can communicate with the second controller 15 via the cloud server 14. The control module 13 stores a first preset time and a second preset time; the second preset time is set to be greater than the first preset time. In the event of an abnormality in the photovoltaic power station, the control module 13 can respond to a control signal sent by the first controller 12 or the second controller 15 and generate a shutdown command. The control module 13 encapsulates the shutdown command into a broadcast packet and sends it to the photovoltaic power optimizers 11 in a group. The control module 13 sets the number of broadcast packets sent to any photovoltaic power optimizer 11 to be greater than or equal to two and less than or equal to five. The photovoltaic power optimizer 11 can respond to the shutdown command and cease operation within the first preset time after receiving the broadcast packet. From the first preset time to the second preset time, the shutdown system 100 is in a patrol state. This ensures that all photovoltaic power optimizers 11 connected to the control module 13 cease operation, thereby ensuring the safety of the photovoltaic power station. By setting the number of broadcast packet transmissions, the above configuration prevents signal fluctuations from causing the photovoltaic power optimizer 11 to fail to receive the shutdown command. In addition, it prevents the excessive number of group broadcast packets from affecting the rapid shutdown of the photovoltaic power optimizer 11, ensuring that the shutdown system 100 enters the inspection state in time.

[0054] Specifically, when the shutdown system 100 is in the inspection state, the control module 13 can detect whether the photovoltaic power optimizer 11 is in the stopped state. The control module 13 can determine whether the photovoltaic power optimizer 11 is in the stopped or started state by whether the photovoltaic power optimizer 11 has a current output.

[0055] Further, if at least part of the photovoltaic power optimizer 11 does not stop working in response to the shutdown instruction, the control module 13 can mark the photovoltaic power optimizer 11 as a first problem device, resend the shutdown instruction to the first problem device, and enter a patrol state between the first preset time and the second preset time after resending the shutdown instruction, so as to detect whether the first problem device stops in response to the shutdown instruction. It should be noted that the control module 13 can also encapsulate the shutdown instruction into a broadcast packet and send it to only the first problem device, and the number of times of receiving the broadcast packet by any first problem device is set to be greater than or equal to 2 and less than or equal to 5.

[0056] Further, if part of the first problem device still does not stop working in response to the shutdown instruction during the patrol process, the control module 13 can mark the part of the first problem device that does not execute the shutdown instruction as a second problem device, and resend the shutdown instruction to the second problem device. At the same time, the control module 13 obtains data information of the second problem device and uploads the data information of the second problem device to the cloud server 14.

[0057] In summary, by setting at least two patrol operations, in the case of abnormal photovoltaic power station, the photovoltaic power optimizer 11 can stop working in response to the touch operation of the first controller 12 or the second controller 15, which ensures the stability of the shutdown system 100. In addition, the photovoltaic power optimizer 11 with problems is marked and uploaded to the cloud server 14, so that the maintenance personnel can quickly locate the problem device, improve the maintenance efficiency of the photovoltaic power optimizer 11, and avoid causing greater loss to the photovoltaic power station.

[0058] In order to clearly illustrate the embodiments of the present application, a control method suitable for the shutdown system 100 of the photovoltaic power optimizer 11 is also provided, which includes the following steps:

[0059] S1, the control module 13 obtains the control signal sent by the first controller 12 and / or the second controller 15;

[0060] S2, the control module 13 controls the photovoltaic power optimizer 11 to start or stop according to the priority of the control signal;

[0061] Step S2 further includes:

[0062] S21, the control module 13 preferentially determines the source of the control signal, and if the control signal comes from the first controller 12, the photovoltaic power optimizer 11 starts or stops in response to the touch operation of the first controller 12;

[0063] S22, if the control signal is from the second controller 15, the control module 13 determines the state of the first controller 12 first, if the first controller 12 is in the off state, the touch operation of the second controller 15 is invalid;

[0064] S23, if the control signal is from the second controller 15 and the first controller 12 is in the closed state, the photovoltaic power optimizer 11 can start or stop in response to the touch operation of the second controller 15.

[0065] Through the above setting, the priority of the first controller 12 is higher than that of the second controller 15, in the case of abnormal photovoltaic power station, if the first controller 12 is in the off state, the control of the second controller 15 on the photovoltaic power optimizer 11 is set to be invalid, so as to avoid the damage of the error operation of the second controller 15 to the photovoltaic power station. In addition, the control method of the shutdown system 100 has a more reliable guarantee mechanism.

[0066] As an implementation manner, the control method further comprises:

[0067] S3, the control module 13 can generate a shutdown instruction based on the control signal and transmit it to the photovoltaic power optimizer 11, within the first preset time after the photovoltaic power optimizer 11 acquires the shutdown instruction, the photovoltaic power optimizer 11 stops working; within the first preset time to the second preset time, the shutdown system 100 is in the patrol state. Wherein, when the shutdown system 100 is in the patrol state, the control module 13 can detect whether any photovoltaic power optimizer 11 stops working.

[0068] As shown in Figure 3 , step S3 further comprises:

[0069] S31, in the patrol state, the control module 13 can detect whether the photovoltaic power optimizer 11 stops working;

[0070] S32, the control module 13 marks the photovoltaic power optimizer 11 still working as a first problem device;

[0071] S33, the control module 13 sends the shutdown instruction to the first problem device again;

[0072] S34, the control module 13 can also detect whether the first problem device stops working;

[0073] S35, the control module 13 marks the first problem device still working as a second problem device;

[0074] S36, the control module 13 uploads the data information of the second problem device to the cloud server 14.

[0075] Through the above setting, the multiple inspection operations can exclude the influence of the occasional events on the photovoltaic power optimizer 11, and the photovoltaic power optimizer 11 is more efficient and stable when the system 100 is controlled to stop. At the same time, the information interaction between the control module 13 and the cloud server 14 can improve the maintenance efficiency of the photovoltaic power optimizer 11.

[0076] It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A shutdown system for a photovoltaic power optimizer, comprising: Photovoltaic power optimizer; a first controller, the first controller being used to control the closing or opening of the photovoltaic power optimizer; Characterized in that the shutdown system further includes a control module, the control module is electrically connected to the first controller, the control module is also communicatively connected to the photovoltaic power optimizer, and the control module can start or stop the photovoltaic power optimizer in response to a touch operation of the first controller; The shutdown system also communicates with a second controller via a control module, and the control module is further capable of starting or stopping the photovoltaic power optimizer in response to a touch operation of the second controller; When the control module controls the photovoltaic power optimizer to be disconnected in response to the touch operation of the first controller, the control of the photovoltaic power optimizer by the second controller is set to an invalid state; when the first controller is in a closed state, the control module can control the photovoltaic power optimizer to switch between starting and stopping in response to the touch operation of the second controller; The control module is capable of receiving a control signal for controlling the photovoltaic power optimizer and determining whether the control signal comes from the first controller or the second controller. When the control module determines that the control signal comes from the first controller, the control module cannot respond to a touch operation of the second controller to start or stop the photovoltaic power optimizer. When the control module determines that the control signal comes from the second controller, the control module identifies whether the first controller is in an open state or a closed state. When the first controller is in the closed state, the control module can respond to the control signal to start or stop the photovoltaic power optimizer. If the first controller is in the open state, the touch operation of the second controller is invalid. Wherein, the first controller and the control module are connected by wire, and the second controller and the control module are connected by wireless communication.

2. The shutdown system according to claim 1, characterized in that The second controller communicates with the control module through a cloud server, and the second controller can send the control signal to the control module through the cloud server.

3. The shutdown system according to claim 1, characterized in that The first controller is configured as at least one of a button, a toggle key, and a rotary knob; the second controller includes at least one of a mobile terminal and a fixed terminal.

4. The shutdown system according to claim 2, characterized in that The control module is configured as a gateway, and the shutdown system can be interconnected with the second controller and / or the cloud server via the control module.

5. The shutdown system according to claim 2, characterized in that The control module stores a first preset time and a second preset time, and the second preset time is set to be greater than the first preset time; when the first controller and / or the second controller is in the disconnected state, the control module can control the photovoltaic power optimizer to stop working, and set the shutdown system to the inspection state from the first preset time to the second preset time.

6. The shutoff system according to claim 5, characterized in that The inspection status is set as the control module detecting in turn whether the photovoltaic power optimizer is stopped. If the control module detects that the photovoltaic power optimizer is still started, the control module obtains data information of the photovoltaic power optimizer and uploads the data information to the cloud server.

7. The shutoff system according to claim 5, characterized in that When the shutdown system is in the inspection state, the control module performs an inspection operation on the photovoltaic power optimizer at least twice.

8. A control method for shutting down a system according to any one of claims 5 to 7, characterized in that: The control method includes: S1. The control module obtains a control signal sent by the first controller and / or the second controller; S2. The control module controls the photovoltaic power optimizer to start or stop according to the priority of the control signal; The step S2 further includes: S21, the control module preferentially determines the source of the control signal, and if the control signal comes from the first controller, the photovoltaic power optimizer starts or stops in response to a touch operation of the first controller; S22: If the control signal comes from the second controller, the control module first determines the state of the first controller. If the first controller is in the disconnected state, The touch operation of the second controller is in an invalid state; S23: If the control signal comes from the second controller and the first controller is in the closed state, the photovoltaic power optimizer can be started or stopped in response to a touch operation of the second controller.

9. The control method for a shutdown system of a photovoltaic power optimizer according to claim 8, characterized in that: Also includes: S3. The control module can generate a shutdown instruction based on the control signal and transmit it to the photovoltaic power optimizer. From the time the photovoltaic power optimizer obtains the shutdown instruction to the first preset time, the photovoltaic power optimizer stops working; from the first preset time to the second preset time, the shutdown system is in the inspection state.

10. The control method for a shutdown system of a photovoltaic power optimizer according to claim 9, characterized in that: The step S3 further includes: S31, in the inspection state, the control module is capable of detecting whether the photovoltaic power optimizer stops working; S32. The control module marks the photovoltaic power optimizer that is still working as a level 1 problem device; S33, the control module sends the shutdown instruction to the first-level problematic device again; S34, the control module can also detect whether the first-level problematic device stops working; S35. The control module marks the first-level problematic device that is still working as a second-level problematic device. S36. The control module uploads the data information of the secondary problem device to the cloud server.

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