CN115622135B

CN115622135B - Photovoltaic power generation system and control method thereof

Info

Publication number: CN115622135B
Application number: CN202211595975.4A
Authority: CN
Inventors: 朱京成
Original assignee: Foxess Co Ltd
Current assignee: Foxess Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-03-10
Anticipated expiration: 2042-12-13
Also published as: CN115622135A

Abstract

The application discloses photovoltaic power generation system and control method of photovoltaic power generation system relates to power technical field, and this system includes: the first end of the photovoltaic module string is connected to the positive input end of the inverter, and the second end of the photovoltaic module string is connected to the negative input end of the inverter; the inverter is used for sending a target conduction signal to the breaker to control the on-off of the breaker, and is also used for detecting an arc characteristic signal of the photovoltaic power generation system to detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal; and the system controller is used for sending a target configuration command to the inverter so as to enable the inverter to send a target conduction signal. Through the method and the device, the problem that the accuracy of on-off control of the photovoltaic module is low due to the fact that the photovoltaic power generation system in the related art can only control the on-off of the photovoltaic module through the single-intensity conducting signal is solved.

Description

Photovoltaic power generation system and control method thereof

Technical Field

The application relates to the technical field of power supplies, in particular to a photovoltaic power generation system and a control method of the photovoltaic power generation system.

Background

With the great reduction of the cost brought by the progress of the light storage technology, more and more family users around the world select to install the light storage system, and the safety problem of the photovoltaic system is also more and more emphasized. In the prior art, the on-off of the photovoltaic module is controlled only by the single-strength conducting signal, and the single-strength conducting signal can meet the requirement of the installation scene with shorter cable length or less electromagnetic interference of the installation environment. However, when the electromagnetic interference of the installation environment is poor or the application scenario of the installation component cable is long, the partial shutdown device cannot identify the weak conducting signal, and thus cannot work.

Aiming at the problem that the accuracy of on-off control of a photovoltaic module is low because a photovoltaic power generation system in the related art can only control the on-off of the photovoltaic module through a single-strength conducting signal, an effective solution is not provided at present.

Disclosure of Invention

The main purpose of the present application is to provide a photovoltaic power generation system and a control method of the photovoltaic power generation system, so as to solve the problem that the accuracy of on-off control of a photovoltaic module is low because the photovoltaic power generation system in the related art can only control on-off of the photovoltaic module through a conduction signal with a single intensity.

In order to achieve the above object, according to one aspect of the present application, there is provided a photovoltaic power generation system including: the photovoltaic module string comprises a plurality of photovoltaic modules and a breaker corresponding to the photovoltaic modules, and the on-off of the photovoltaic modules is controlled by the breaker; the inverter is used for sending a target conduction signal to the breaker to control the breaker to be switched on, and is further used for detecting an arc characteristic signal of a photovoltaic power generation system to detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal, wherein the target conduction signal is one of the following signals: the signal intensity of the first conducting signal is smaller than that of the second conducting signal; a system controller, configured to send a target configuration instruction to the inverter, so that the inverter sends the target turn-on signal, where the target configuration instruction is one of: the inverter is configured to transmit the first conduction signal when the system controller transmits the first configuration command to the inverter, and to transmit the second conduction signal when the system controller transmits the second configuration command to the inverter.

Further, the inverter includes at least: the arc discharge controller is used for detecting an arc characteristic signal of the photovoltaic power generation system so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal; and the turn-off controller is used for sending a target turn-on signal to the turn-off device so as to control the turn-on of the turn-off device.

Further, the photovoltaic power generation system further includes: the first magnetic ring is connected to the positive input end of the inverter, and the arc discharge controller detects arc characteristic signals of the photovoltaic power generation system through the first magnetic ring; and the second magnetic ring is connected to the negative input end of the inverter, and the turn-off controller sends the target turn-on signal to the turn-off device through the second magnetic ring.

In order to achieve the above object, according to one aspect of the present application, there is provided a control method of a photovoltaic power generation system. The method comprises the following steps: if a system controller in a photovoltaic power generation system detects a starting signal of the photovoltaic power generation system, sending a first configuration instruction to a turn-off controller in the photovoltaic power generation system so as to send a first conduction signal to a turn-off device in the photovoltaic power generation system through the turn-off controller, wherein the turn-off device is turned on according to the first conduction signal so as to access a photovoltaic module into the photovoltaic power generation system; after a first preset time, the system controller detects a voltage value between a positive input end and a negative input end of an inverter in the photovoltaic power generation system to obtain a first voltage value, and sends a second configuration instruction to the turn-off controller through the system controller so as to send a second turn-on signal to the turn-off device through the turn-off controller, wherein the turn-off device performs turn-on processing according to the second turn-on signal to access a photovoltaic module into the photovoltaic power generation system, and the signal intensity of the second turn-on signal is higher than that of the first turn-on signal; after a second turn-on signal is sent to the shutdown device through the shutdown controller, timing is started, after a second preset time, the system controller detects a voltage value between a positive input end and a negative input end of the inverter to obtain a second voltage value, and a target configuration instruction to be sent of the system controller is determined according to the first voltage value and the second voltage value, wherein the target configuration instruction is one of the following: a first configuration instruction and a second configuration instruction; the system controller sends the target configuration instruction to the turn-off controller according to a preset time period, so that a target turn-on signal is sent to the turn-off device through the turn-off controller according to the preset time period, wherein the turn-off device is maintained in a turn-on state according to the target turn-on signal, so that the photovoltaic power generation system supplies power to the outside, and the target turn-on signal is one of the following signals: a first conducting signal and a second conducting signal.

Further, determining a target configuration instruction to be sent of the system controller according to the first voltage value and the second voltage value includes: calculating a difference value between the first voltage value and the second voltage value to obtain a target voltage difference value; judging whether the target voltage difference value is less than or equal to a first voltage threshold value or not; if the target voltage difference is smaller than or equal to the first voltage threshold, determining that a target configuration instruction to be sent of the system controller is the first configuration instruction; and if the target voltage difference is greater than the first voltage threshold, determining that a target configuration instruction to be sent of the system controller is the second configuration instruction.

Further, if the target turn-on signal is the first turn-on signal, when the turn-off controller sends the target turn-on signal to the turn-off device according to the preset time period, the method further includes: the system controller sets an arc discharge controller in the photovoltaic power generation system in a working state so as to detect an arc characteristic signal of the photovoltaic power generation system through the arc discharge controller, wherein the arc discharge controller detects the arc characteristic signal according to the preset time period and sends the arc characteristic signal to the system controller; and the system controller receives the arc characteristic signal and detects whether the working state of the photovoltaic power generation system is abnormal or not according to the arc characteristic signal.

Further, if the target turn-on signal is the second turn-on signal, when the turn-off controller sends the target turn-on signal to the turn-off device according to the preset time period, the method further includes: when the turn-off controller sends the second conducting signal, the arc discharge controller is set in a non-working state; and after the second conduction signal is sent once by the turn-off controller, setting the arc discharge controller in a working state so as to detect the arc characteristic signal of the photovoltaic power generation system through the arc discharge controller.

Further, setting the arc discharge controller in an operating state, so that detecting the arc characteristic signal of the photovoltaic power generation system through the arc discharge controller includes: the arc discharge controller detects arc characteristic signals of the photovoltaic power generation system through the first magnetic ring and sends the arc characteristic signals to the system controller so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the system controller.

Further, the system controller sends the target configuration instruction to the shutdown controller according to a preset time period, and sending a target turn-on signal to the shutdown device through the shutdown controller according to the preset time period includes: the system controller sends the target configuration instruction to the shutdown controller according to the preset time period; the turn-off controller determines the target turn-on signal according to the target configuration instruction; and the turn-off controller sends the target turn-on signal to the turn-off device through the second magnetic ring according to the preset time period.

Further, the switching-on process of the switch-off device according to the first on signal includes: receiving, by a receiving circuit in the shutter, the first turn-on signal; the receiving circuit analyzes the first conducting signal to obtain a target digital signal, and sends the target digital signal to a controller in the shutoff device; and the controller in the turnout controller controls the turnout controller to be switched on based on the target digital signal.

Further, after the system controller sends the target configuration instruction to the shutdown controller according to a preset time period, so as to send a target turn-on signal to the shutdown device through the shutdown controller according to the preset time period, the method further includes: the system controller acquires and records a voltage value between a positive input end and a negative input end of the inverter to obtain a third voltage value; if the system controller detects that the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is greater than a second voltage threshold, sending the first configuration instruction to a shutdown controller in the photovoltaic power generation system is executed again until the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is less than or equal to the second voltage threshold.

In order to achieve the above object, according to another aspect of the present application, there is provided a control apparatus of a photovoltaic power generation system. The device includes: the photovoltaic module switching device comprises a first sending unit, a second sending unit and a switching-off unit, wherein the first sending unit is used for sending a first configuration instruction to a switching-off controller in a photovoltaic power generation system if a system controller in the photovoltaic power generation system detects a starting signal of the photovoltaic power generation system so as to send a first conducting signal to a switching-off device in the photovoltaic power generation system through the switching-off controller, and the switching-off device conducts switching-on processing according to the first conducting signal so as to connect a photovoltaic module into the photovoltaic power generation system; a second sending unit, configured to, after a first preset time, detect, by the system controller, a voltage value between a positive input end and a negative input end of an inverter in the photovoltaic power generation system to obtain a first voltage value, and send, by the system controller, a second configuration instruction to the shutdown controller, so as to send, by the shutdown controller, a second turn-on signal to the shutdown device, where the shutdown device performs turn-on processing according to the second turn-on signal, so as to connect a photovoltaic module to the photovoltaic power generation system, and a signal intensity of the second turn-on signal is higher than a signal intensity of the first turn-on signal; a first detecting unit, configured to start timing after a second turn-on signal is sent to the shutdown device by the shutdown controller, after a second preset time, the system controller detects a voltage value between a positive input end and a negative input end of the inverter to obtain a second voltage value, and determines a target configuration instruction to be sent of the system controller according to the first voltage value and the second voltage value, where the target configuration instruction is one of: a first configuration instruction and a second configuration instruction; a third sending unit, configured to send, by the system controller, the target configuration instruction to the shutdown controller according to a preset time period, so as to send, by the shutdown controller, a target turn-on signal to the shutdown device according to the preset time period, where the shutdown device is maintained in a turned-on state according to the target turn-on signal, so that the photovoltaic power generation system supplies power to the outside, where the target turn-on signal is one of: a first conducting signal and a second conducting signal.

Further, the first detection unit includes: the calculating module is used for calculating the difference value between the first voltage value and the second voltage value to obtain a target voltage difference value; the judging module is used for judging whether the target voltage difference value is smaller than or equal to a first voltage threshold value or not; a first determining module, configured to determine, if the target voltage difference is smaller than or equal to the first voltage threshold, that a target configuration instruction to be sent of the system controller is the first configuration instruction; a second determining module, configured to determine, if the target voltage difference is greater than the first voltage threshold, that a target configuration instruction to be sent of the system controller is the second configuration instruction.

Further, the apparatus further comprises: the system controller is used for setting an arc discharge controller in the photovoltaic power generation system in a working state when the shutdown controller sends a target conduction signal to the shutdown device according to the preset time period if the target conduction signal is the first conduction signal, so as to detect an arc characteristic signal of the photovoltaic power generation system through the arc discharge controller, wherein the arc discharge controller detects the arc characteristic signal according to the preset time period and sends the arc characteristic signal to the system controller; and the second detection unit is used for receiving the arc characteristic signal by the system controller and detecting whether the working state of the photovoltaic power generation system is abnormal or not according to the arc characteristic signal.

Further, the apparatus further comprises: a second setting unit, configured to set the arc discharge controller in a non-operating state when the shutdown controller sends the second on signal when the target on signal is sent to the shutdown device by the shutdown controller according to the preset time period if the target on signal is the second on signal; and the third setting unit is used for setting the arc discharge controller in a working state after the second conduction signal is sent once by the turn-off controller so as to detect the arc characteristic signal of the photovoltaic power generation system through the arc discharge controller.

Further, the third setting unit includes: the detection module is used for detecting an arc characteristic signal of the photovoltaic power generation system through the first magnetic ring by the arc discharge controller and sending the arc characteristic signal to the system controller so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the system controller.

Further, the third transmitting unit includes: a first sending module, configured to send, by the system controller, the target configuration instruction to the shutdown controller according to the preset time period; a third determining module, configured to determine, by the shutdown controller, the target turn-on signal according to the target configuration instruction; and the second sending module is used for sending the target conducting signal to the shutoff device by the shutoff controller through a second magnetic ring according to the preset time period.

Further, the first transmitting unit includes: a receiving module, configured to receive the first turn-on signal through a receiving circuit in the switch-off device; the analysis module is used for analyzing the first conduction signal by the receiving circuit to obtain a target digital signal and sending the target digital signal to a controller in the shutoff device; and the control module is used for controlling the on-off of the switch-off device by a controller in the switch-off device based on the target digital signal.

Further, the apparatus further comprises: the acquisition unit is used for acquiring and recording a voltage value between a positive input end and a negative input end of the inverter to obtain a third voltage value after the system controller sends the target configuration instruction to the turn-off controller according to a preset time period so as to send a target turn-on signal to the turn-off device through the turn-off controller according to the preset time period; a third detecting unit, configured to, if the system controller detects that a difference between a voltage value between the positive input end and the negative input end of the inverter and the third voltage value is greater than a second voltage threshold, execute sending the first configuration instruction to a shutdown controller in the photovoltaic power generation system again until the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is less than or equal to the second voltage threshold.

In order to achieve the above object, according to an aspect of the present application, there is also provided a processor for executing a program, wherein the program is executed to execute the control method of the photovoltaic power generation system according to any one of the above.

In order to achieve the above object, according to an aspect of the present application, there is also provided an electronic device including one or more processors and a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the control method of the photovoltaic power generation system.

According to the photovoltaic module string control method, at least one photovoltaic module string is adopted, a first end of the photovoltaic module string is connected to a positive input end of an inverter, a second end of the photovoltaic module string is connected to a negative input end of the inverter, the photovoltaic module string comprises a plurality of photovoltaic modules and turn-off devices corresponding to the photovoltaic modules, and the turn-on and turn-off of the photovoltaic modules are controlled through the turn-off devices; the inverter is used for sending a target conduction signal to the breaker to control the breaker to be switched on, and is also used for detecting an arc characteristic signal of the photovoltaic power generation system to detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal, wherein the target conduction signal is one of the following signals: the signal intensity of the first conducting signal is smaller than that of the second conducting signal; the system controller is used for sending a target configuration instruction to the inverter so as to enable the inverter to send a target conduction signal, wherein the target configuration instruction is one of the following instructions: the photovoltaic power generation system comprises a first configuration instruction and a second configuration instruction, wherein when the system controller sends the first configuration instruction to the inverter, the inverter sends a first conduction signal, and when the system controller sends the second configuration instruction to the inverter, the inverter sends a second conduction signal, so that the problem that the accuracy of on-off control of the photovoltaic component is low because the photovoltaic power generation system in the related art can only control the on-off of the photovoltaic component through the conduction signal with single intensity is solved. According to the scheme, the photovoltaic power generation system is provided with the first configuration instruction, the second configuration instruction, the first conduction signal and the second conduction signal, the on-off of the on-off device is accurately controlled through the first conduction signal and the second conduction signal, and therefore the effect of improving the accuracy of on-off control of the photovoltaic assembly is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 is a schematic illustration of a photovoltaic power generation system provided in accordance with an embodiment of the present application;

fig. 2 is a schematic diagram of a shutdown controller periodically sending a turn-on signal according to an embodiment of the present application;

FIG. 3 is a schematic view of an alternative photovoltaic power generation system provided in accordance with an embodiment of the present application;

FIG. 4 is a flow chart of a control method of a photovoltaic power generation system provided according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a control device of a photovoltaic power generation system provided according to an embodiment of the present application;

fig. 6 is a schematic diagram of an electronic device provided according to an embodiment of the application.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

With the great reduction of the cost brought by the progress of the light storage technology, more and more family users around the world select to install the light storage system, and the safety problem of the photovoltaic system is also more and more emphasized, so that the photovoltaic system is required to have a rapid component turn-off function and a direct current arc detection function at present. In the prior art, the on-off of the photovoltaic module can be controlled only through the single-strength conducting signal, and the single-strength conducting signal can meet the requirement for installation scenes with short cable lengths or small electromagnetic interference in installation environments. However, when the electromagnetic interference of the installation environment is poor or the application scenario of the installation component cable is long, the partial shutdown device cannot identify the weak conducting signal, and thus cannot work.

In the above technical background, a photovoltaic power generation system is provided, which is described below, and fig. 1 is a schematic diagram of a photovoltaic power generation system provided according to an embodiment of the present application, and as shown in fig. 1, the photovoltaic power generation system includes:

the photovoltaic module string comprises at least one photovoltaic module string 10, wherein a first end of the photovoltaic module string 10 is connected to a positive input end of an inverter 20, a second end of the photovoltaic module string is connected to a negative input end of the inverter 20, the photovoltaic module string comprises a plurality of photovoltaic modules 10N and turn-off devices 11N corresponding to the photovoltaic modules, and the turn-on and turn-off of the photovoltaic modules 11N are controlled through the turn-off devices 10N; the inverter 20 is configured to send a target turn-on signal to the shutdown device to control the switching on of the shutdown device, and is further configured to detect an arc characteristic signal of the photovoltaic power generation system to detect whether an abnormality exists in a working state of the photovoltaic power generation system through the arc characteristic signal, where the target turn-on signal is one of: the signal intensity of the first conducting signal is smaller than that of the second conducting signal; the system controller 30 is configured to send a target configuration command to the inverter 20, so that the inverter 20 sends a target turn-on signal, where the target configuration command is one of: a first configuration command and a second configuration command, wherein when the system controller 30 sends the first configuration command to the inverter 20, the inverter sends a first conduction signal, and when the system controller 30 sends the second configuration command to the inverter, the inverter 20 sends a second conduction signal.

The inverter 20 includes at least: the arc discharge controller 201 is used for detecting an arc characteristic signal of the photovoltaic power generation system, so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal; and an off controller 202, wherein the off controller 202 is configured to send a target on signal to the turn-off device 11N to control the turn-on of the turn-off device 11N.

Specifically, as shown in fig. 1, the photovoltaic power generation system provided by the embodiment of the present application includes a photovoltaic module string 10, an inverter 20, and a system controller 30. The photovoltaic module string 10 includes a plurality of photovoltaic modules 10N and corresponding shutdown devices 11N, such as photovoltaic modules 101 to 10N in fig. 1, and shutdown devices 111 to 11N. The input end of each breaker 11N is connected to the corresponding photovoltaic module 10N, and the on/off of the photovoltaic module 10N is controlled by the breaker 11N. In an alternative embodiment, the photovoltaic module string 10 may include only one photovoltaic module and one shutdown device, or may include a plurality of photovoltaic modules and one shutdown device.

The first end and the second end of the photovoltaic module string 10 are connected to the positive input end and the negative input end of the inverter 20, and the inverter 20 at least includes an arc discharge controller 201 and a shutdown controller 202. The arc discharge controller 201 is configured to detect an arc characteristic signal of the photovoltaic power generation system, so as to detect whether an abnormality exists in the operating state of the photovoltaic power generation system through the arc characteristic signal. The turn-off controller 202 sends a target-on signal to the turn-off device 11N to control the turn-on of the turn-off device 11N. As shown in fig. 2, the turn-off controller 202 needs to transmit a target-on signal to the turn-off device 11N at intervals (e.g., once sent for 1 s) to keep the turn-off device 11N on. If the gate-off device 11N does not receive the target on signal for a period of time, the gate-off device 11N is in the off state. The shutdown controller 202 and the shutdown device 11N may communicate via the SUNSPEC protocol.

The effective frequency of the SUNSPEC-defined preset turn-on signal is 120kHz-150kHz. Since the actual device is not ideal, the turn-on signal sent by the turn-off controller 202 includes a certain amount of 0-100kHz signal in addition to the effective signal of 120-150 kHz. The target turn-on signal is one of the following: the device comprises a first conducting signal and a second conducting signal, wherein the intensity of the first conducting signal is lower than that of the second conducting signal. I.e. the first on-signal contains a content of 0-100kHz that is lower than the second on-signal contains a content of 0-100kHz. The strength of the first conduction signal means that it supplies power using 3.3VDC or 5VDC, and the strength of the second conduction signal means that it supplies power using 12VDC or more. The first conducting signal can meet the installation scene that the length of a component cable is short or the electromagnetic interference of the installation environment is small. The second conducting signal can meet the installation scene that the length of the component cable is long or the electromagnetic interference of the installation environment is large. The on-off of the shutoff device 11N can be more accurately controlled by the first and second on signals, so that the photovoltaic power generation system provided by the embodiment of the application can adapt to different installation environments.

The arc discharge controller 201 obtains an arc characteristic signal of the photovoltaic power generation system by sampling the current on the cable, and can accurately detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal. Generally, the selected arc eigenfrequency is typically between 0-100kHz. Therefore, when the shutdown controller 202 continuously transmits the target on signal according to the timing shown in fig. 2, the arc discharge controller 201 may also detect a certain arc characteristic signal. The arcing controller 201 detects the arc characteristic signal and outputs an arc detection signal to the system controller 30. In order to prevent erroneous determination, this arc detection determination threshold is generally set to be greater than the intensity of the arc characteristic signal caused by the target on signal detected at that time.

As shown in fig. 1, the system controller 30 is connected to the arcing controller 201 and the shutdown controller 202, respectively, and communicates with the arcing controller 201 and the shutdown controller 202. When the inverter 20 is started, the system controller 30 samples and records the dc voltage between the positive input terminal and the negative input terminal of the inverter 20 and receives the arc characteristic signal uploaded by the arc discharge controller 201, and the system controller 30 sends a target configuration instruction to the shutdown controller 202 according to the dc voltage between the positive input terminal and the negative input terminal of the inverter 20 to select the first conduction signal or the second conduction signal and control the operating mode of the arc discharge controller 202.

The target configuration instructions sent by the system controller 30 include a first configuration instruction and a second configuration instruction, and when the system controller 30 sends the first configuration instruction to the shutdown controller 202, the shutdown controller 202 selects the first on signal and transmits the first on signal to control the plurality of shutdown devices 11N to be turned on; when the system controller 30 sends the second configuration command to the shutdown controller 202, the shutdown controller 202 selects the second turn-on signal and transmits the second turn-on signal to control the plurality of the shutdown devices 11N to turn on.

In fig. 1, PLC refers to a PLC signal, and refers to an analog signal modulated by a PLC device.

In conclusion, the on-off of the shutoff device 11N can be more accurately controlled by the first on-signal and the second on-signal, so that the effect of improving the accuracy of on-off control of the photovoltaic module is achieved.

The photovoltaic power generation system further comprises the following contents: the first magnetic ring 40, the first magnetic ring 40 is connected to the positive input end of the inverter 20, wherein the arc discharge controller 201 detects an arc characteristic signal of the photovoltaic power generation system through the first magnetic ring 40; and a second magnetic ring 50, wherein the second magnetic ring 50 is connected to the negative input terminal of the inverter 20, and the shutdown controller 202 sends the target turn-on signal to the shutdown device 10N through the second magnetic ring 50.

Specifically, as shown in fig. 1, the photovoltaic power generation system further includes a first magnetic ring 40 and a second magnetic ring 50, wherein a coil is wound on the magnetic ring, and the magnetic ring is sleeved on the positive input cable or the negative input cable. The first magnetic ring 40 and the second magnetic ring 50 may be both sleeved on the positive input cable, or both sleeved on the negative input cable, or one of the first magnetic ring 40 and the second magnetic ring 50 is sleeved on the positive input cable, and the other is sleeved on the negative input cable, as shown in fig. 1. It should be noted that a capacitor is further connected between the first magnetic ring 40 and the second magnetic ring 50 for maintaining a path. The shutdown controller 202 couples the target turn-on signal to the input cable through the coil of the second magnetic ring 50, and the shutdown device 111N, after receiving the target turn-on signal, analyzes the target turn-on signal according to the SUNSPEC protocol to perform turn-on. The arc discharge controller 201 is connected with the coil of the first magnetic ring 40 through a connecting wire, and the current on the input cable is sampled through the coil of the first magnetic ring 40 to obtain an arc characteristic signal of the photovoltaic power generation system.

In an alternative embodiment, as shown in fig. 3, a plurality of strings of pv modules may be included in the pv power generation system. The inverter can accurately control a plurality of photovoltaic module strings. As shown in fig. 3, the photovoltaic power generation system includes a photovoltaic module string 10, an inverter 20, a system controller 30, a first magnetic ring 40, a second magnetic ring 50, and a photovoltaic module string 60, wherein the photovoltaic module string 10 includes a plurality of photovoltaic modules (101 to 10N) and a plurality of shutdown devices (111 to 11N). The photovoltaic module string 60 comprises a plurality of photovoltaic modules (601-60N) and a plurality of breakers (611-61N). The inverter 20 includes an arc discharge controller 201 and a shutdown controller 202. In fig. 3, PLC refers to a PLC signal, and refers to an analog signal modulated by a PLC device.

In the photovoltaic power generation system provided by the embodiment of the application, at least one photovoltaic module string is adopted, a first end of the photovoltaic module string is connected to a positive input end of an inverter, a second end of the photovoltaic module string is connected to a negative input end of the inverter, the photovoltaic module string comprises a plurality of photovoltaic modules and a breaker corresponding to the photovoltaic modules, and the on-off of the photovoltaic modules is controlled through the breaker; the inverter is used for sending a target conduction signal to the shutoff device to control the switching-on of the shutoff device, and is also used for detecting an arc characteristic signal of the photovoltaic power generation system to detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal, wherein the target conduction signal is one of the following signals: the signal intensity of the first conducting signal is smaller than that of the second conducting signal; the system controller is used for sending a target configuration instruction to the inverter so as to enable the inverter to send a target conduction signal, wherein the target configuration instruction is one of the following instructions: the photovoltaic power generation system comprises a first configuration instruction and a second configuration instruction, wherein when the system controller sends the first configuration instruction to the inverter, the inverter sends a first conduction signal, and when the system controller sends the second configuration instruction to the inverter, the inverter sends a second conduction signal, so that the problem that the accuracy of on-off control of the photovoltaic component is low because the photovoltaic power generation system in the related art can only control on-off of the photovoltaic component through the conduction signal with single intensity is solved. In the photovoltaic power generation system provided by the scheme, the first configuration instruction, the second configuration instruction, the first conduction signal and the second conduction signal are arranged, and the on-off of the on-off device is accurately controlled through the first conduction signal and the second conduction signal, so that the effect of improving the accuracy of on-off control of the photovoltaic component is achieved.

The present invention is described below with reference to preferred implementation steps, and fig. 4 is a flowchart of a control method of a photovoltaic power generation system according to an embodiment of the present application, where the control method can be applied to the photovoltaic power generation system, as shown in fig. 4, and the method includes the following steps:

step S401, if a system controller in the photovoltaic power generation system detects a start signal of the photovoltaic power generation system, sending a first configuration instruction to a shutdown controller in the photovoltaic power generation system so as to send a first conduction signal to a shutdown device in the photovoltaic power generation system through the shutdown controller, wherein the shutdown device is switched on according to the first conduction signal so as to connect a photovoltaic module into the photovoltaic power generation system;

specifically, after the system controller detects a start signal of the photovoltaic power generation system, the system controller immediately sends a first configuration signal to the shutdown controller, and the shutdown controller selects a first on signal according to the first configuration signal and transmits the first on signal to control the at least one shutdown device to be turned on. And the corresponding photovoltaic module is connected into the photovoltaic power generation system through the opening of the breaker so as to provide power supply for the outside.

Step S402, after a first preset time, a system controller detects a voltage value between a positive input end and a negative input end of an inverter in a photovoltaic power generation system to obtain a first voltage value, and sends a second configuration instruction to a turn-off controller through the system controller to send a second conduction signal to a turn-off device through the turn-off controller, wherein the turn-off device carries out turn-on processing according to the second conduction signal to connect a photovoltaic module into the photovoltaic power generation system, and the signal intensity of the second conduction signal is higher than that of the first conduction signal;

specifically, after the system controller sends the first configuration signal and a first preset time (for example, 5 s) elapses, a voltage value between a positive input terminal and a negative input terminal of an inverter in the photovoltaic power generation system is sampled and recorded, and a first voltage value V1 is obtained. The current photovoltaic module can be accurately judged by detecting the voltage value between the positive input end and the negative input end of the inverter, and how many photovoltaic modules are connected into the photovoltaic power generation system.

After the first voltage value is obtained, in order to determine whether the shutdown device cannot receive the first conduction signal due to the fact that a cable of the current installation environment is too long, electromagnetic interference is too strong and the like, the system controller sends a second configuration instruction to the shutdown controller, and the shutdown controller selects a second conduction signal according to the second configuration instruction and transmits the second conduction signal to control at least one shutdown device to be turned on. And the corresponding photovoltaic module is connected into the photovoltaic power generation system through the opening of the breaker so as to provide power supply for the outside.

Step S403, after the shutdown controller sends the second turn-on signal to the shutdown device, start timing, and after a second preset time, the system controller detects a voltage value between the positive input end and the negative input end of the inverter to obtain a second voltage value, and determines a target configuration instruction to be sent of the system controller according to the first voltage value and the second voltage value, where the target configuration instruction is one of: a first configuration instruction and a second configuration instruction;

specifically, after the system controller sends the second configuration signal and a second preset time (for example, 5 s) elapses, the voltage value between the positive input terminal and the negative input terminal of the inverter in the photovoltaic power generation system is sampled and recorded, and a second voltage value V2 is obtained. The photovoltaic power generation system can accurately judge the number of the photovoltaic modules connected into the photovoltaic power generation system at present by detecting the voltage value between the positive input end and the negative input end of the inverter.

By comparing the difference between the first direct-current voltage V1 and the second direct-current voltage V2, which conduction signal the photovoltaic power generation system under the current installation environment is suitable for emitting can be accurately determined. Therefore, a target configuration command to be sent of the system controller is determined by the first direct current voltage V1 and the second direct current voltage V2.

Step S404, the system controller sends a target configuration instruction to the shutdown controller according to a preset time period, so as to send a target turn-on signal to the shutdown device according to the preset time period through the shutdown controller, wherein the shutdown device is maintained in a turn-on state according to the target turn-on signal, so that the photovoltaic power generation system supplies power to the outside, and the target turn-on signal is one of the following: a first conducting signal and a second conducting signal.

Specifically, after determining which on-signal the photovoltaic power generation system under the current installation environment is suitable for emitting, the system controller may send a target configuration instruction to the shutdown controller according to a preset time period (e.g., 1 s/time), and the shutdown controller determines a target on-signal according to the target configuration instruction and sends the target on-signal to the shutdown device according to the preset time period, as shown in fig. 2. And maintaining the on-state of the shutoff device through the target on-signal so as to enable the photovoltaic power generation system to supply power to the outside through the photovoltaic module.

In summary, the installation scene that the length of the component cable is short or the electromagnetic interference of the installation environment is small can be met through the first conduction signal. The second conduction signal can meet the requirement of a long assembly cable or a large installation scene with large electromagnetic interference in the installation environment, so that the photovoltaic power generation system can adapt to different installation environments through the steps, and the on-off of the breaker in the photovoltaic power generation system can be accurately controlled through the first conduction signal and the second conduction signal in different installation environments.

How to determine a target configuration command to be sent of the system controller according to the first voltage value and the second voltage value is crucial, and therefore, in the control method of the photovoltaic power generation system provided by the embodiment of the present application, the following limitations are further made: calculating a difference value between the first voltage value and the second voltage value to obtain a target voltage difference value; judging whether the target voltage difference value is smaller than or equal to a first voltage threshold value or not; if the target voltage difference is smaller than or equal to the first voltage threshold, determining a target configuration instruction to be sent of the system controller as a first configuration instruction; and if the target voltage difference is larger than the first voltage threshold, determining that a target configuration instruction to be sent of the system controller is a second configuration instruction.

Specifically, the first direct-current voltage V1 and the second direct-current voltage V2 are compared, when a difference value between the first direct-current voltage V1 and the second direct-current voltage V2 exceeds a first voltage threshold Vth1, the system controller sends a second configuration instruction to the shutdown controller, otherwise, the system controller sends the first configuration instruction to the shutdown controller. When the difference value between the first direct current voltage V1 and the second direct current voltage V2 exceeds a first voltage threshold Vth1, it is indicated that a part of the turn-off devices do not receive the first conduction signal, the corresponding installation environment of the photovoltaic power generation system is poor, the turn-off controller needs to transmit the second conduction signal, and otherwise, the turn-off controller only needs to transmit the first conduction signal. In the present embodiment, the first voltage threshold Vth1 is about an open circuit voltage of a photovoltaic device, for example. The voltage can be 40V, and whether the first conduction signal is not received by the turn-off device can be judged through the open-circuit voltage of one photovoltaic module.

Because the photovoltaic power generation system direct current needs to have the arc detection function to guarantee the safety of the photovoltaic power generation system through the arc detection function, if the target turn-on signal is the first turn-on signal, when the target turn-on signal is sent to the turn-off device through the turn-off controller according to the preset time period, the method further comprises the following steps: the system controller sets an arc discharge controller in the photovoltaic power generation system in a working state so as to detect an arc characteristic signal of the photovoltaic power generation system through the arc discharge controller, wherein the arc discharge controller detects the arc characteristic signal according to a preset time period and sends the arc characteristic signal to the system controller; and the system controller receives the arc characteristic signal and detects whether the working state of the photovoltaic power generation system is abnormal or not according to the arc characteristic signal.

If the target turn-on signal is the second turn-on signal, when the target turn-on signal is sent to the turn-off device by the turn-off controller according to the preset time period, the method further comprises the following steps: when the turn-off controller sends a second conduction signal, the arc discharge controller is set in a non-working state; after the shutdown controller sends the second conduction signal for the first time, the arc discharge controller is set in a working state, so that the arc characteristic signal of the photovoltaic power generation system is detected through the arc discharge controller.

Specifically, if the shutdown controller is suitable for transmitting a first conduction signal, the system controller sends a first configuration instruction to the shutdown controller, the shutdown controller sends the first conduction signal, and the system controller controls the arc discharge controller to be in a working state at the same time, that is, the arc discharge controller detects an arc characteristic signal and outputs the arc characteristic signal to the system controller, so as to detect whether the working state of the photovoltaic power generation system is abnormal or not.

If the shutdown controller is suitable for transmitting the second conduction signal, the system controller can send a second configuration instruction to the shutdown controller, and when the shutdown controller transmits the second conduction signal, the system controller controls the working mode of the arc discharge controller to be switched to a stop working mode, namely, the arc discharge controller is set in a non-working state, and after a third preset time (namely, when the shutdown controller does not transmit the second conduction signal), the working mode of the arc discharge controller is controlled to be switched to a normal working mode. The arcing detection is turned off or aborted during the time period in which the shutdown controller transmits the second on signal because there is a higher probability that arcing false detection will be caused during the time period in which the shutdown controller transmits the second on signal. Therefore, in order to ensure the detection accuracy of the arc discharge controller, the arc discharge detection is turned off or abandoned in the time period when the second conduction signal is transmitted by the disconnection controller.

In order to improve the accuracy of arc discharge detection, the arc discharge controller is arranged in a working state, and the arc characteristic signal of the photovoltaic power generation system is detected by the arc discharge controller, and the method comprises the following steps: the arc discharge controller detects arc characteristic signals of the photovoltaic power generation system through the first magnetic ring and sends the arc characteristic signals to the system controller so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the system controller.

Specifically, when the arc discharge controller is set in a working state, the arc discharge controller samples current on an input cable through a coil of the first magnetic ring to obtain an arc characteristic signal of the photovoltaic power generation system. And the arc drawing controller sends the arc characteristic signals to the system controller, and the system controller detects whether the working state of the photovoltaic power generation system is abnormal or not according to the arc characteristic signals. In summary, the arc characteristic signals of the photovoltaic power generation system can be accurately detected through the first magnetic ring and the arc discharge controller, and therefore the accuracy of judging the working state of the photovoltaic power generation system is improved.

In the control method of the photovoltaic power generation system provided by the embodiment of the application, the system controller sends the target configuration instruction to the turn-off controller according to the preset time period, so that the turn-off controller sends the target turn-on signal to the turn-off device according to the preset time period, and the method comprises the following steps: the system controller sends a target configuration instruction to the turn-off controller according to a preset time period; the turn-off controller determines a target turn-on signal according to the target configuration instruction; the turn-off controller sends a target turn-on signal to the turn-off device through the second magnetic ring according to a preset time period.

Specifically, the system controller sends a target configuration instruction to the turn-off controller according to a preset time period, the turn-off controller determines a target turn-on signal to be transmitted according to the target configuration instruction, and after the target turn-on signal is determined, the turn-off controller couples the target turn-on signal to the input cable through the second magnetic ring according to the preset time period, so that the turn-off device receives the target turn-on signal and performs on-off control according to the target turn-on signal.

In order to improve the accuracy of the on-signal processing of the turn-off device, the turn-on processing of the turn-off device according to the first on-signal comprises the following steps: receiving a first turn-on signal by a receiving circuit in the turn-off; the receiving circuit analyzes the first conduction signal to obtain a target digital signal, and sends the target digital signal to a controller in the turn-off device; and the controller in the turn-off device controls the turn-off device to be conducted based on the target digital signal.

Specifically, the turn-off device at least comprises a receiving circuit and a controller, the receiving circuit in the turn-off device receives the first conducting signal, and the receiving circuit analyzes the first conducting signal to obtain an analyzed target digital signal. The receiving circuit sends the target digital signal to a controller in the breaker, and the controller in the breaker controls the breaker to be switched on based on the target digital signal. Through the steps, the accuracy of the turn-on signal processing of the turn-off device can be improved.

The technical scheme is operated once when the photovoltaic power generation system is installed, but the actual environment is changed, and the interference of the environment is not necessarily the largest when the photovoltaic power generation system is installed, so that a check needs to be set, and whether the target turn-on signal output by the turn-off controller needs to be changed or not is determined through the check.

Therefore, after the system controller sends the target configuration command to the shutdown controller according to the preset time period, so as to send the target turn-on signal to the shutdown device through the shutdown controller according to the preset time period, the method further includes: the system controller collects and records a voltage value between a positive input end and a negative input end of the inverter to obtain a third voltage value; and if the system controller detects that the difference value between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is larger than the second voltage threshold, sending the first configuration instruction to the turn-off controller in the photovoltaic power generation system again until the difference value between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is smaller than or equal to the second voltage threshold.

After the photovoltaic power generation system is installed, the system controller collects and records a current voltage value between a positive input end and a negative input end of the inverter to obtain a third voltage value; if the system controller detects that the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is greater than a second voltage threshold (for example, 40V), it indicates that the photovoltaic module is in an open circuit state in the current photovoltaic power generation system, that is, the shutdown device does not receive the target turn-on signal sent by the shutdown controller, and therefore, it is necessary to execute sending of the first configuration instruction to the shutdown controller in the photovoltaic power generation system again until the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is less than or equal to the second voltage threshold.

In an alternative embodiment, the photovoltaic power generation system needs to be periodically detected to ensure that the photovoltaic power generation system is normally powered externally. That is, when the system controller receives the check instruction, sending the first configuration instruction to the shutdown controller in the photovoltaic power generation system is executed again to determine the target turn-on signal that the shutdown controller is suitable for sending.

In conclusion, the control strategies of switching off and arc discharge in the photovoltaic power generation system are optimized, different conduction signals are selected to be applied to the current environment, the working mode of the arc discharge controller is selected according to the selected conduction signals, and therefore the switching off and arc discharge functions of the system can adapt to different installation scenes.

According to the control method of the photovoltaic power generation system, if the system controller in the photovoltaic power generation system detects a starting signal of the photovoltaic power generation system, a first configuration instruction is sent to the turn-off controller in the photovoltaic power generation system, so that a first conduction signal is sent to the turn-off device in the photovoltaic power generation system through the turn-off controller, wherein the turn-off device conducts turn-on processing according to the first conduction signal, and a photovoltaic module is connected into the photovoltaic power generation system; after the first preset time, the system controller detects a voltage value between a positive input end and a negative input end of an inverter in the photovoltaic power generation system to obtain a first voltage value, and sends a second configuration instruction to the turn-off controller through the system controller to send a second conduction signal to the turn-off device through the turn-off controller, wherein the turn-off device carries out turn-on processing according to the second conduction signal to connect the photovoltaic module into the photovoltaic power generation system, and the signal intensity of the second conduction signal is higher than that of the first conduction signal; after the turn-off controller sends a second turn-on signal to the turn-off device, timing is started, after a second preset time, the system controller detects a voltage value between a positive input end and a negative input end of the inverter to obtain a second voltage value, and a target configuration instruction to be sent of the system controller is determined according to the first voltage value and the second voltage value, wherein the target configuration instruction is one of the following instructions: a first configuration instruction and a second configuration instruction; the system controller sends a target configuration instruction to the turn-off controller according to a preset time period so as to send a target turn-on signal to the turn-off device according to the preset time period through the turn-off controller, wherein the turn-off device is maintained in a turn-on state according to the target turn-on signal so as to enable the photovoltaic power generation system to supply power to the outside, and the target turn-on signal is one of the following signals: the first conduction signal and the second conduction signal solve the problem that a photovoltaic power generation system in the related art can only control the on-off of a photovoltaic assembly through a conduction signal with single intensity, so that the accuracy of on-off control of the photovoltaic assembly is low. According to the scheme, the photovoltaic power generation system is provided with the first configuration instruction, the second configuration instruction, the first conduction signal and the second conduction signal, the on-off of the on-off device is accurately controlled through the first conduction signal and the second conduction signal, and therefore the effect of improving the accuracy of on-off control of the photovoltaic assembly is achieved.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

The embodiment of the present application further provides a control device of a photovoltaic power generation system, and it should be noted that the control device of the photovoltaic power generation system of the embodiment of the present application may be used to execute the control method for the photovoltaic power generation system provided by the embodiment of the present application. The following describes a control device of a photovoltaic power generation system provided in an embodiment of the present application.

Fig. 5 is a schematic diagram of a control device of a photovoltaic power generation system according to an embodiment of the present application. As shown in fig. 5, the apparatus includes: a first sending unit 501, a second sending unit 502, a first detecting unit 503 and a third sending unit 504.

A first sending unit 501, configured to send a first configuration instruction to a shutdown controller in the photovoltaic power generation system if a system controller in the photovoltaic power generation system detects a start signal of the photovoltaic power generation system, so as to send a first turn-on signal to a shutdown device in the photovoltaic power generation system through the shutdown controller, where the shutdown device performs turn-on processing according to the first turn-on signal, so as to access a photovoltaic module into the photovoltaic power generation system;

a second sending unit 502, configured to, after a first preset time, detect a voltage value between a positive input end and a negative input end of an inverter in a photovoltaic power generation system by a system controller, obtain a first voltage value, send a second configuration instruction to a shutdown controller through the system controller, and send a second conduction signal to a shutdown device through the shutdown controller, where the shutdown device performs a switching-on process according to the second conduction signal to switch a photovoltaic module into the photovoltaic power generation system, and a signal intensity of the second conduction signal is higher than a signal intensity of the first conduction signal;

the first detecting unit 503 is configured to start timing after the shutdown controller sends the second turn-on signal to the shutdown device, after a second preset time, the system controller detects a voltage value between the positive input end and the negative input end of the inverter to obtain a second voltage value, and determines a target configuration instruction to be sent of the system controller according to the first voltage value and the second voltage value, where the target configuration instruction is one of: a first configuration instruction and a second configuration instruction;

a third sending unit 504, configured to send, by the system controller, a target configuration instruction to the shutdown controller according to a preset time period, so as to send, by the shutdown controller, a target turn-on signal to the shutdown device according to the preset time period, where the shutdown device is maintained in a turn-on state according to the target turn-on signal, so that the photovoltaic power generation system supplies power to the outside, where the target turn-on signal is one of the following: a first conducting signal and a second conducting signal.

According to the control device of the photovoltaic power generation system provided by the embodiment of the application, if a system controller in the photovoltaic power generation system detects a start signal of the photovoltaic power generation system, a first configuration instruction is sent to a shutdown controller in the photovoltaic power generation system through a first sending unit 501, so that a first conduction signal is sent to a shutdown device in the photovoltaic power generation system through the shutdown controller, wherein the shutdown device performs switching-on processing according to the first conduction signal, so as to switch a photovoltaic module into the photovoltaic power generation system; after the second sending unit 502 detects a voltage value between a positive input end and a negative input end of an inverter in the photovoltaic power generation system after the first preset time, a first voltage value is obtained, a second configuration instruction is sent to the turn-off controller through the system controller, and a second conducting signal is sent to the turn-off device through the turn-off controller, wherein the turn-off device conducts turn-on processing according to the second conducting signal to connect the photovoltaic module into the photovoltaic power generation system, and the signal intensity of the second conducting signal is higher than that of the first conducting signal; after the first detecting unit 503 sends the second turn-on signal to the shutdown device through the shutdown controller, it starts timing, and after a second preset time, the system controller detects a voltage value between the positive input end and the negative input end of the inverter to obtain a second voltage value, and determines a target configuration instruction to be sent of the system controller according to the first voltage value and the second voltage value, where the target configuration instruction is one of: a first configuration instruction and a second configuration instruction; the third sending unit 504 sends a target configuration instruction to the shutdown controller according to a preset time period, so as to send a target turn-on signal to the shutdown device according to the preset time period through the shutdown controller, wherein the shutdown device is maintained in a turn-on state according to the target turn-on signal, so that the photovoltaic power generation system supplies power to the outside, and the target turn-on signal is one of the following signals: the first conduction signal and the second conduction signal solve the problem that a photovoltaic power generation system in the related art can only control the on-off of a photovoltaic module through a conduction signal with single intensity, so that the accuracy of on-off control of the photovoltaic module is low. According to the scheme, the photovoltaic power generation system is provided with the first configuration instruction, the second configuration instruction, the first conduction signal and the second conduction signal, the on-off of the on-off device is accurately controlled through the first conduction signal and the second conduction signal, and therefore the effect of improving the accuracy of on-off control of the photovoltaic assembly is achieved.

Optionally, in the control apparatus of a photovoltaic power generation system provided in the embodiment of the present application, the first detecting unit 503 includes: the calculating module is used for calculating the difference value between the first voltage value and the second voltage value to obtain a target voltage difference value; the judging module is used for judging whether the target voltage difference value is smaller than or equal to a first voltage threshold value or not; the first determining module is used for determining a target configuration instruction to be sent of the system controller as a first configuration instruction if the target voltage difference value is smaller than or equal to a first voltage threshold value; and the second determining module is used for determining that the target configuration instruction to be sent of the system controller is a second configuration instruction if the target voltage difference value is greater than the first voltage threshold value.

Optionally, in the control device of a photovoltaic power generation system provided in an embodiment of the present application, the device further includes: the system comprises a first setting unit, a system controller and a system controller, wherein the first setting unit is used for setting an arc-pulling controller in a photovoltaic power generation system in a working state when a target conduction signal is sent to a shutoff device through the shutoff controller according to a preset time period if the target conduction signal is a first conduction signal, so as to detect an arc characteristic signal of the photovoltaic power generation system through the arc-pulling controller, wherein the arc-pulling controller detects the arc characteristic signal according to the preset time period and sends the arc characteristic signal to the system controller; and the second detection unit is used for receiving the arc characteristic signal by the system controller and detecting whether the working state of the photovoltaic power generation system is abnormal or not according to the arc characteristic signal.

Optionally, in the control device of a photovoltaic power generation system provided in an embodiment of the present application, the device further includes: the second setting unit is used for setting the arc discharge controller in a non-working state when the shutdown controller sends the second conducting signal when the target conducting signal is sent to the shutdown device according to the preset time period through the shutdown controller if the target conducting signal is the second conducting signal; and the third setting unit is used for setting the arc-drawing controller in a working state after the shutdown controller sends the second conduction signal for the first time so as to detect the arc characteristic signal of the photovoltaic power generation system through the arc-drawing controller.

Optionally, in the control device of a photovoltaic power generation system provided in the embodiment of the present application, the third setting unit includes: the detection module is used for detecting an arc characteristic signal of the photovoltaic power generation system through the first magnetic ring by the arc discharge controller and sending the arc characteristic signal to the system controller so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the system controller.

Optionally, in the control device of the photovoltaic power generation system provided in the embodiment of the present application, the third sending unit 504 includes: the system comprises a first sending module, a second sending module and a switching-off module, wherein the first sending module is used for sending a target configuration instruction to the switching-off controller by the system controller according to a preset time period; the third determining module is used for determining a target conducting signal according to the target configuration instruction by the cut-off controller; and the second sending module is used for sending a target conducting signal to the turn-off device through the second magnetic ring according to a preset time period by the turn-off controller.

Optionally, in the control apparatus of the photovoltaic power generation system provided in the embodiment of the present application, the first sending unit 501 includes: the receiving module is used for receiving the first conducting signal through a receiving circuit in the turn-off device; the analysis module is used for analyzing the first conduction signal by the receiving circuit to obtain a target digital signal and sending the target digital signal to a controller in the turn-off device; and the control module is used for controlling the on-off of the on-off device by the controller in the on-off device based on the target digital signal.

Optionally, in the control device of a photovoltaic power generation system provided in the embodiment of the present application, the device further includes: the system comprises a collecting unit, a system controller and a shutdown controller, wherein the collecting unit is used for sending a target configuration instruction to the shutdown controller according to a preset time period, and after the shutdown controller sends a target turn-on signal to the shutdown device according to the preset time period, the system controller collects and records a voltage value between a positive input end and a negative input end of an inverter to obtain a third voltage value; and the third detection unit is used for sending the first configuration instruction to the shutdown controller in the photovoltaic power generation system again until the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is less than or equal to the second voltage threshold if the system controller detects that the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is greater than the second voltage threshold.

The control device of the photovoltaic power generation system comprises a processor and a memory, wherein the first sending unit 501, the second sending unit 502, the first detecting unit 503, the third sending unit 504 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one kernel can be set, and the accurate control of the photovoltaic component string in the photovoltaic power generation system is realized by adjusting the kernel parameters.

The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.

The embodiment of the invention provides a processor, which is used for running a program, wherein a control method of a photovoltaic power generation system is executed when the program runs.

As shown in fig. 6, an embodiment of the present invention provides an electronic device, where the device includes a processor, a memory, and a program stored in the memory and executable on the processor, and the processor executes the program to implement the following steps: if a system controller in the photovoltaic power generation system detects a starting signal of the photovoltaic power generation system, sending a first configuration instruction to a turn-off controller in the photovoltaic power generation system so as to send a first conduction signal to a turn-off device in the photovoltaic power generation system through the turn-off controller, wherein the turn-off device is turned on according to the first conduction signal so as to access a photovoltaic module into the photovoltaic power generation system; after the first preset time, the system controller detects a voltage value between a positive input end and a negative input end of an inverter in the photovoltaic power generation system to obtain a first voltage value, and sends a second configuration instruction to the turn-off controller through the system controller to send a second conduction signal to the turn-off device through the turn-off controller, wherein the turn-off device carries out turn-on processing according to the second conduction signal to connect the photovoltaic module into the photovoltaic power generation system, and the signal intensity of the second conduction signal is higher than that of the first conduction signal; after the turn-off controller sends a second turn-on signal to the turn-off device, timing is started, after a second preset time, the system controller detects a voltage value between a positive input end and a negative input end of the inverter to obtain a second voltage value, and a target configuration instruction to be sent of the system controller is determined according to the first voltage value and the second voltage value, wherein the target configuration instruction is one of the following instructions: a first configuration instruction and a second configuration instruction; the system controller sends a target configuration instruction to the turn-off controller according to a preset time period so as to send a target turn-on signal to the turn-off device according to the preset time period through the turn-off controller, wherein the turn-off device is maintained in a turn-on state according to the target turn-on signal so as to enable the photovoltaic power generation system to supply power to the outside, and the target turn-on signal is one of the following signals: a first conducting signal and a second conducting signal.

Optionally, determining, according to the first voltage value and the second voltage value, a target configuration instruction to be sent of the system controller includes: calculating a difference value between the first voltage value and the second voltage value to obtain a target voltage difference value; judging whether the target voltage difference value is smaller than or equal to a first voltage threshold value or not; if the target voltage difference is smaller than or equal to the first voltage threshold, determining a target configuration instruction to be sent of the system controller as a first configuration instruction; and if the target voltage difference is larger than the first voltage threshold, determining that a target configuration instruction to be sent of the system controller is a second configuration instruction.

Optionally, if the target turn-on signal is the first turn-on signal, when the target turn-on signal is sent to the shutdown device by the shutdown controller according to the preset time period, the method further includes: the system controller sets an arc discharge controller in the photovoltaic power generation system in a working state so as to detect an arc characteristic signal of the photovoltaic power generation system through the arc discharge controller, wherein the arc discharge controller detects the arc characteristic signal according to a preset time period and sends the arc characteristic signal to the system controller; and the system controller receives the arc characteristic signal and detects whether the working state of the photovoltaic power generation system is abnormal or not according to the arc characteristic signal.

Optionally, if the target turn-on signal is the second turn-on signal, when the target turn-on signal is sent to the shutdown device by the shutdown controller according to the preset time period, the method further includes: when the turn-off controller sends a second conduction signal, the arc discharge controller is set in a non-working state; after the shutdown controller sends the second conduction signal for the first time, the arc discharge controller is set in a working state, so that the arc characteristic signal of the photovoltaic power generation system is detected through the arc discharge controller.

Optionally, the setting the arc discharge controller in the operating state, so as to detect the arc characteristic signal of the photovoltaic power generation system through the arc discharge controller includes: the arc discharge controller detects arc characteristic signals of the photovoltaic power generation system through the first magnetic ring and sends the arc characteristic signals to the system controller so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the system controller.

Optionally, the sending, by the system controller, the target configuration instruction to the shutdown controller according to the preset time period, so as to send the target turn-on signal to the shutdown device through the shutdown controller according to the preset time period includes: the system controller sends a target configuration instruction to the shutdown controller according to a preset time period; the turn-off controller determines a target turn-on signal according to the target configuration instruction; and the turn-off controller sends a target turn-on signal to the turn-off device through the second magnetic ring according to a preset time period.

Optionally, the turning on processing of the turn-off device according to the first turn-on signal includes: receiving a first on signal by a receiving circuit in the turn-off; the receiving circuit analyzes the first conduction signal to obtain a target digital signal and sends the target digital signal to a controller in the turn-off device; and the controller in the turn-off device controls the turn-off device to be conducted based on the target digital signal.

Optionally, after the system controller sends the target configuration instruction to the shutdown controller according to the preset time period, so as to send the target turn-on signal to the shutdown device through the shutdown controller according to the preset time period, the method further includes: the system controller collects and records a voltage value between a positive input end and a negative input end of the inverter to obtain a third voltage value; and if the system controller detects that the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is greater than a second voltage threshold, sending the first configuration instruction to the shutdown controller in the photovoltaic power generation system again until the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is less than or equal to the second voltage threshold.

The device herein may be a server, a PC, a PAD, a mobile phone, etc.

The present application further provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: if a system controller in the photovoltaic power generation system detects a starting signal of the photovoltaic power generation system, sending a first configuration instruction to a turn-off controller in the photovoltaic power generation system so as to send a first conducting signal to a turn-off device in the photovoltaic power generation system through the turn-off controller, wherein the turn-off device is used for conducting turn-on processing according to the first conducting signal so as to connect a photovoltaic module into the photovoltaic power generation system; after the first preset time, the system controller detects a voltage value between a positive input end and a negative input end of an inverter in the photovoltaic power generation system to obtain a first voltage value, and sends a second configuration instruction to the turn-off controller through the system controller to send a second conduction signal to the turn-off device through the turn-off controller, wherein the turn-off device carries out turn-on processing according to the second conduction signal to connect the photovoltaic module into the photovoltaic power generation system, and the signal intensity of the second conduction signal is higher than that of the first conduction signal; after the turn-off controller sends a second turn-on signal to the turn-off device, timing is started, after a second preset time, the system controller detects a voltage value between a positive input end and a negative input end of the inverter to obtain a second voltage value, and a target configuration instruction to be sent of the system controller is determined according to the first voltage value and the second voltage value, wherein the target configuration instruction is one of the following instructions: a first configuration instruction and a second configuration instruction; the system controller sends a target configuration instruction to the turn-off controller according to a preset time period, so that a target turn-on signal is sent to the turn-off device through the turn-off controller according to the preset time period, wherein the turn-off device is maintained in a turn-on state according to the target turn-on signal, so that the photovoltaic power generation system supplies power to the outside, and the target turn-on signal is one of the following signals: a first conducting signal and a second conducting signal.

Optionally, determining a target configuration instruction to be sent of the system controller according to the first voltage value and the second voltage value includes: calculating a difference value between the first voltage value and the second voltage value to obtain a target voltage difference value; judging whether the target voltage difference value is smaller than or equal to a first voltage threshold value or not; if the target voltage difference is smaller than or equal to the first voltage threshold, determining a target configuration instruction to be sent of the system controller as a first configuration instruction; and if the target voltage difference is larger than the first voltage threshold, determining that a target configuration instruction to be sent of the system controller is a second configuration instruction.

Optionally, if the target turn-on signal is the second turn-on signal, when the target turn-on signal is sent to the shutdown device by the shutdown controller according to the preset time period, the method further includes: when the turn-off controller sends a second conduction signal, the arc discharge controller is set in a non-working state; after the shutdown controller sends the second conduction signal for the first time, the arc discharge controller is set in a working state, and the arc characteristic signal of the photovoltaic power generation system is detected through the arc discharge controller.

Optionally, the sending, by the system controller, the target configuration instruction to the shutdown controller according to the preset time period, so that sending, by the shutdown controller, the target turn-on signal to the shutdown device according to the preset time period includes: the system controller sends a target configuration instruction to the turn-off controller according to a preset time period; the turn-off controller determines a target turn-on signal according to the target configuration instruction; the turn-off controller sends a target turn-on signal to the turn-off device through the second magnetic ring according to a preset time period.

Optionally, the turning on processing of the turn-off device according to the first turn-on signal includes: receiving a first turn-on signal by a receiving circuit in the turn-off; the receiving circuit analyzes the first conduction signal to obtain a target digital signal and sends the target digital signal to a controller in the turn-off device; and the controller in the turn-off device controls the turn-off device to be conducted based on the target digital signal.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A photovoltaic power generation system, comprising:

the photovoltaic module string comprises a plurality of photovoltaic modules and a breaker corresponding to the photovoltaic modules, and the on-off of the photovoltaic modules is controlled by the breaker;

the inverter is used for sending a target conduction signal to the breaker to control the breaker to be switched on, and is also used for detecting an arc characteristic signal of a photovoltaic power generation system to detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal, wherein the target conduction signal is one of the following signals: the signal intensity of the first conducting signal is smaller than that of the second conducting signal;

a system controller, configured to send a target configuration instruction to the inverter, so that the inverter sends the target turn-on signal, where the target configuration instruction is one of: the inverter comprises a first configuration instruction and a second configuration instruction, wherein when the system controller sends the first configuration instruction to the inverter, the inverter sends the first conducting signal, and when the system controller sends the second configuration instruction to the inverter, the inverter sends the second conducting signal.

2. Photovoltaic power generation system according to claim 1, characterized in that the inverter comprises at least:

the arc discharge controller is used for detecting an arc characteristic signal of a photovoltaic power generation system so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the arc characteristic signal;

and the turn-off controller is used for sending a target turn-on signal to the turn-off device so as to control the turn-on of the turn-off device.

3. The photovoltaic power generation system of claim 2, further comprising:

the first magnetic ring is connected to the positive input end of the inverter, and the arc discharge controller detects arc characteristic signals of the photovoltaic power generation system through the first magnetic ring;

and the second magnetic ring is connected to the negative input end of the inverter, and the turn-off controller sends the target turn-on signal to the turn-off device through the second magnetic ring.

4. A control method of a photovoltaic power generation system, characterized in that the control method is applied to the photovoltaic power generation system of any one of claims 1 to 3, and includes:

if a system controller in a photovoltaic power generation system detects a starting signal of the photovoltaic power generation system, sending a first configuration instruction to a shutdown controller in the photovoltaic power generation system so as to send a first conducting signal to a shutdown device in the photovoltaic power generation system through the shutdown controller, wherein the shutdown device conducts switching-on processing according to the first conducting signal so as to connect a photovoltaic module into the photovoltaic power generation system;

after a first preset time, the system controller detects a voltage value between a positive input end and a negative input end of an inverter in the photovoltaic power generation system to obtain a first voltage value, and sends a second configuration instruction to the turn-off controller through the system controller to send a second turn-on signal to the turn-off device through the turn-off controller, wherein the turn-off device performs turn-on processing according to the second turn-on signal to connect a photovoltaic module into the photovoltaic power generation system, and the signal intensity of the second turn-on signal is higher than that of the first turn-on signal;

after the turn-off controller sends a second turn-on signal to the turn-off device, timing is started, after a second preset time, the system controller detects a voltage value between a positive input end and a negative input end of the inverter to obtain a second voltage value, and a target configuration instruction to be sent of the system controller is determined according to the first voltage value and the second voltage value, wherein the target configuration instruction is one of the following instructions: a first configuration instruction and a second configuration instruction;

the system controller sends the target configuration instruction to the turn-off controller according to a preset time period, so as to send a target turn-on signal to the turn-off device according to the preset time period through the turn-off controller, wherein the turn-off device is maintained in a turn-on state according to the target turn-on signal, so that the photovoltaic power generation system supplies power to the outside, and the target turn-on signal is one of the following signals: a first conducting signal and a second conducting signal.

5. The control method of the photovoltaic power generation system according to claim 4, wherein determining the target configuration command to be sent of the system controller according to the first voltage value and the second voltage value comprises:

calculating a difference value between the first voltage value and the second voltage value to obtain a target voltage difference value;

judging whether the target voltage difference value is smaller than or equal to a first voltage threshold value or not;

if the target voltage difference is smaller than or equal to the first voltage threshold, determining that a target configuration instruction to be sent of the system controller is the first configuration instruction;

and if the target voltage difference is greater than the first voltage threshold, determining that a target configuration instruction to be sent of the system controller is the second configuration instruction.

6. The method for controlling a photovoltaic power generation system according to claim 5, wherein if the target turn-on signal is the first turn-on signal, when the turn-off controller sends the target turn-on signal to the turn-off device according to the preset time period, the method further comprises:

the system controller sets an arc discharge controller in the photovoltaic power generation system in a working state so as to detect an arc characteristic signal of the photovoltaic power generation system through the arc discharge controller, wherein the arc discharge controller detects the arc characteristic signal according to the preset time period and sends the arc characteristic signal to the system controller;

and the system controller receives the arc characteristic signal and detects whether the working state of the photovoltaic power generation system is abnormal or not according to the arc characteristic signal.

7. The method according to claim 5, wherein if the target turn-on signal is the second turn-on signal, when the turn-off controller sends the target turn-on signal to the turn-off device according to the preset time period, the method further comprises:

when the turn-off controller sends the second conducting signal, the arc discharge controller is set in a non-working state;

and after the second conduction signal is sent once by the turn-off controller, setting the arc discharge controller in a working state so as to detect the arc characteristic signal of the photovoltaic power generation system through the arc discharge controller.

8. The control method of the photovoltaic power generation system according to claim 7, wherein the setting of the arc discharge controller in an operating state so as to detect the arc characteristic signal of the photovoltaic power generation system by the arc discharge controller includes:

the arc discharge controller detects arc characteristic signals of the photovoltaic power generation system through the first magnetic ring and sends the arc characteristic signals to the system controller so as to detect whether the working state of the photovoltaic power generation system is abnormal or not through the system controller.

9. The control method of the photovoltaic power generation system according to claim 4, wherein the system controller sends the target configuration command to the shutdown controller according to a preset time period, so as to send a target turn-on signal to the shutdown device through the shutdown controller according to the preset time period comprises:

the system controller sends the target configuration instruction to the shutdown controller according to the preset time period;

the turn-off controller determines the target turn-on signal according to the target configuration instruction;

and the turn-off controller sends the target turn-on signal to the turn-off device through the second magnetic ring according to the preset time period.

10. The control method of the photovoltaic power generation system according to claim 4, wherein the turning-on process of the turn-off device according to the first turn-on signal includes:

receiving, by a receiving circuit in the turn-off, the first turn-on signal;

the receiving circuit analyzes the first conduction signal to obtain a target digital signal, and sends the target digital signal to a controller in the shutoff device;

and the controller in the turnout controller controls the turnout controller to be switched on based on the target digital signal.

11. The control method of the photovoltaic power generation system according to claim 4, wherein after the system controller sends the target configuration command to the shutdown controller according to a preset time period to send a target turn-on signal to the shutdown device through the shutdown controller according to the preset time period, the method further comprises:

the system controller collects and records a voltage value between a positive input end and a negative input end of the inverter to obtain a third voltage value;

if the system controller detects that the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is greater than a second voltage threshold, sending the first configuration instruction to a shutdown controller in the photovoltaic power generation system is executed again until the difference between the voltage value between the positive input end and the negative input end of the inverter and the third voltage value is less than or equal to the second voltage threshold.

12. A control device of a photovoltaic power generation system, characterized by comprising:

the photovoltaic module switching device comprises a first sending unit, a second sending unit and a switching-off unit, wherein the first sending unit is used for sending a first configuration instruction to a switching-off controller in a photovoltaic power generation system if a system controller in the photovoltaic power generation system detects a starting signal of the photovoltaic power generation system so as to send a first conducting signal to a switching-off device in the photovoltaic power generation system through the switching-off controller, and the switching-off device conducts switching-on processing according to the first conducting signal so as to connect a photovoltaic module into the photovoltaic power generation system;

a second sending unit, configured to, after a first preset time, detect, by the system controller, a voltage value between a positive input end and a negative input end of an inverter in the photovoltaic power generation system to obtain a first voltage value, and send, by the system controller, a second configuration instruction to the shutdown controller, so as to send, by the shutdown controller, a second turn-on signal to the shutdown device, where the shutdown device performs turn-on processing according to the second turn-on signal to access a photovoltaic module to the photovoltaic power generation system, and a signal intensity of the second turn-on signal is higher than a signal intensity of the first turn-on signal;

a first detecting unit, configured to start timing after a second turn-on signal is sent to the shutdown device by the shutdown controller, after a second preset time, the system controller detects a voltage value between a positive input end and a negative input end of the inverter to obtain a second voltage value, and determines a target configuration instruction to be sent of the system controller according to the first voltage value and the second voltage value, where the target configuration instruction is one of: a first configuration instruction and a second configuration instruction;

a third sending unit, configured to send, by the system controller, the target configuration instruction to the shutdown controller according to a preset time period, so as to send, by the shutdown controller, a target turn-on signal to the shutdown device according to the preset time period, where the shutdown device is maintained in a turn-on state according to the target turn-on signal, so that the photovoltaic power generation system supplies power to the outside, where the target turn-on signal is one of: a first conducting signal and a second conducting signal.

13. A processor, characterized in that the processor is configured to run a program, wherein the program when executed performs the method of controlling a photovoltaic power generation system of claim 4.

14. An electronic device comprising one or more processors and memory for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of controlling a photovoltaic power generation system of claim 4.