WO2022266899A1

WO2022266899A1 - Photovoltaic module control method and apparatus

Info

Publication number: WO2022266899A1
Application number: PCT/CN2021/101893
Authority: WO
Inventors: 武超; 刘鹏; 陶爽; 连家玮; 魏代海
Original assignee: 华北电力大学扬中智能电气研究中心
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-12-29

Abstract

Disclosed are a photovoltaic module control method and apparatus, which are used to improve the communication reliability and flexibility of a photovoltaic operation and maintenance system. The method comprises: a target junction box receives first information from a control gateway, the target junction box being one of a plurality of junction boxes, and the plurality of junction boxes being in one-to-one correspondence with a plurality of photovoltaic modules; and the target junction box executes an operation corresponding to the first information, wherein the first information is used to request data from the target junction box, and the data comprises attribute information of the photovoltaic module corresponding to the target junction box, or the first information is used for the target junction box to turn off the photovoltaic module corresponding thereto, or the first information is used to configure the target junction box and/or the photovoltaic module corresponding thereto.

Description

A method and device for controlling a photovoltaic module

technical field

The invention relates to the field of photovoltaic power generation, in particular to a photovoltaic module control method and device.

Background technique

Power line carrier (power line carrier, PLC) communication is a communication method that uses power lines as the information transmission medium. This communication method does not need to re-lay lines, and data transmission can be completed as long as there are power lines. It is reliable, low-cost, and safe. Advantage. With the advent of the Internet of Things era, the design of the power line carrier communication system has become the preferred solution for intelligent system communication, and is applied in various fields, including photovoltaic power generation.

During the operation of the photovoltaic power station, the system collects the operating parameters of the photovoltaic power station, monitors and records the operation status of the power station, which is an indispensable part of the photovoltaic power station. Maintaining the efficient and stable operation of photovoltaic modules is the basis for the smooth operation of photovoltaic power plants, but during the working process of photovoltaic modules, they are inevitably affected by the outside world and themselves, resulting in component failures. If the failure is not eliminated in time during the operation of the power station, it may damage other related electrical equipment and even cause a fire.

In the current photovoltaic operation and maintenance system, it is necessary to collect the operation data of the inverter and the combiner box to count the overall power generation and income of the string composed of multiple photovoltaic modules, but it is impossible to achieve data collection for a single photovoltaic module , so the data collection method is not flexible enough. In addition, when photovoltaic modules use wireless communication technology to communicate, due to the large number of components in the power station, the diffraction, reflection and refraction of a large number of wireless signals will cause serious same-frequency interference and adjacent channel interference, resulting in transmission errors, and even Make wireless communication impossible. The traditional low-voltage power line carrier technology has low frequency, relatively slow communication speed, and is easily affected by other signals, so it cannot transmit information efficiently. High-speed broadband power line carrier technology has no corresponding regulatory constraints and a lack of unified specifications, resulting in immature equipment evaluation and detection technology, and equipment cannot be well maintained. If the temperature of the photovoltaic module is too high and a fire occurs, the traditional operation and maintenance system cannot send an alarm message in time, and cannot disconnect the connection between the photovoltaic modules in time.

In summary, the reliability and flexibility of communication methods in the photovoltaic operation and maintenance system in the prior art are not high, and it is impossible to monitor the parameters of photovoltaic modules in a timely manner, and it does not support real-time configuration of photovoltaic modules, and it is impossible to manually intervene and eliminate them in time. Fault.

Contents of the invention

The invention provides a photovoltaic module control method and device, which are used to improve the communication reliability and flexibility of a photovoltaic operation and maintenance system.

In a first aspect, the present invention provides a photovoltaic module control method, including:

The target junction box receives the first information from the control gateway, the target junction box is one of multiple junction boxes, and there is a one-to-one correspondence between the multiple junction boxes and multiple photovoltaic modules; the target junction box executes An operation corresponding to the first information; wherein, the first information is used to request data from the target junction box, and the data includes attribute information of the photovoltaic module corresponding to the target junction box; or, The first information is used for the target junction box to shut down the photovoltaic module corresponding to the target junction box; or, the first information is used to configure the target junction box and/or the photovoltaic module corresponding to the target junction box components.

Based on this method, the control gateway can communicate with the junction box to support the control gateway to obtain the data of the photovoltaic module corresponding to any junction box, or realize the configuration of the junction box and/or photovoltaic module, which can improve communication reliability and flexibility sex.

In a possible design, the target junction box performs an operation corresponding to the first information, including: the target junction box sends second information to the control gateway, and the second information is the Response information for the first message.

In a possible design, the first information is used to request data from the target junction box, and the second information includes the data.

In a possible design, it also includes: the target junction box obtains the working state parameters of the photovoltaic components, and the working state parameters include at least one of current, voltage, temperature or power; the target junction box according to The working state parameter turns off the photovoltaic module.

With this design, the shutdown of photovoltaic modules can be controlled by the target junction box to reduce the safety risk of photovoltaic modules.

In a possible design, the target junction box turns off the photovoltaic module according to the working state parameters, including: the target junction box turns off the photovoltaic module through a mousse tube or a relay according to the working state parameters. Photovoltaic modules.

With this design, each photovoltaic module can be turned off through a mousse tube or a relay, improving the safety of the entire system.

In the second aspect, the present invention also provides a photovoltaic module control, including: the control gateway determines the first information; the control gateway sends the first information to the target junction box, and the target junction box is one of the plurality of junction boxes , there is a one-to-one correspondence between the plurality of junction boxes and the plurality of photovoltaic modules; wherein, the first information is used to request data from the target junction box, and the data includes the photovoltaic modules corresponding to the target junction box property information of the component; or, the first information is used for the target junction box to shut down the photovoltaic module corresponding to the target junction box; or, the first information is used for configuring the target junction box and/or the target junction box PV module corresponding to the target junction box.

In a possible design, the method further includes: the control gateway receiving second information from the target junction box, the second information being response information to the first information; the control gateway according to the The second information determines the number of on-line junction boxes among the junction boxes.

In a possible design, it further includes: the control gateway sends the first information N times to the target junction box, and fails to receive the If the response information of the first information is received, the number of offline junction boxes among the junction boxes is determined according to N, where N is a positive integer.

In a possible design, the control gateway can determine the first information, so it can manage and control multiple junction boxes, so as to realize the collection, transmission and monitoring of photovoltaic module parameters.

In a third aspect, the present invention also provides an electronic device, the electronic device includes a processor, and the processor is used to implement the first aspect, the second aspect, or the first aspect or Any possible design steps of the method in the second aspect.

In a fourth aspect, the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when it is run on a computer, the computer executes the first aspect, the second aspect, or the first aspect or the second aspect. Any possible design steps of the method in any aspect.

In addition, for the beneficial effects of the second aspect to the fourth aspect, reference may be made to the beneficial effects described in the first aspect, which will not be repeated here.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of a photovoltaic module control system provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a junction box provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a control gateway provided by an embodiment of the present invention;

Fig. 4 is a schematic flowchart of a photovoltaic module control method provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a communication process provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a communication process provided by an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a photovoltaic module control device provided by an embodiment of the present invention;

Fig. 8 is a schematic diagram of a modular structure of another photovoltaic module control device provided by an embodiment of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to improve the communication reliability of the photovoltaic operation and maintenance system, the embodiments of the present invention provide a photovoltaic module control method and device.

The photovoltaic module control method provided by the embodiment of the present application can be realized by the system shown in Figure 1, which consists of a control gateway (or intelligent control gateway, etc.), multiple photovoltaic modules, and multiple junction boxes (or called photovoltaic junction boxes, intelligent Junction box terminal, etc.), through which the control of photovoltaic modules can be realized. Among them, there is a one-to-one correspondence between multiple junction boxes and multiple photovoltaic modules, and multiple junction boxes are connected in series, and are connected in series with the control gateway at the same time. The function of the junction box in this application can be realized by the junction box system. Among them, the junction box system can be realized by chips. For example, the junction box system is designed and built with a control circuit board, which can be directly installed in the junction box and is compatible with traditional junction boxes, which is convenient for battery panel manufacturers to install.

As shown in Figure 1, the photovoltaic module can be a solar cell module, and its working state parameters have a great impact on the operation of the photovoltaic power station. For example, traditional photovoltaic modules use bypass diodes to deal with the thermal shift effect caused by shadow shading. When shading occurs, the large current in the battery string will generate a lot of heat through the bypass diodes. If the high temperature generated in the junction box exists for a long time, it will seriously affect the junction box and The service life of the battery board. When multiple photovoltaic modules are connected in series, the total voltage may be as high as 1 kilovolt (kV), requiring appropriate risk monitoring measures. When the power generation system encounters a disaster, even if the main circuit circuit switch is disconnected, the high voltage of the system to the ground still exists, making the whole system still very dangerous. Therefore, the system collects the operating parameters of the photovoltaic power station, monitors and records the operating status of the power station and manages and controls it, which is an indispensable part of the photovoltaic power station.

In Figure 1, multiple photovoltaic modules connected in series with the control gateway can be referred to as a string (or photovoltaic string), and each string (and/or photovoltaic modules in the string) is configured with a string address, which can be Different strings are distinguished by string addresses or string numbers (string 1#...string 4# as shown in Figure 1, which is not limited to this in practical applications). In addition, the photovoltaic modules in each string can be configured with their own addresses, and different photovoltaic modules can be distinguished by the addresses of the photovoltaic modules or the numbers of the photovoltaic modules. In Fig. 1, each string can include 12 photovoltaic modules (numbered 1#, 2#...12#), which is not limited in practical applications.

In this application, the junction box can at least have the following functions:

(1) Complete information transmission in a real-time, stable and efficient manner, and obtain property information of photovoltaic modules in a timely and accurate manner. Wherein, the property information may be working state parameters of the photovoltaic module, or may be configuration parameters such as addresses and version numbers.

Optionally, the operating state parameters of the photovoltaic module may include current, voltage, temperature, power, etc., which are not specifically limited in this application.

(2) It has the function of shutting off abnormal conditions such as fire. For example, it can be judged according to the collected working status parameters. When it is judged that the working status parameters reach the preset threshold, the junction box device will shut down the connection of each photovoltaic module, reducing the The string voltage realizes the shutdown of photovoltaic modules.

Optionally, the junction box can realize the shutdown of the photovoltaic module through a moss tube (MOSFET) or a relay. For example, when the relay is turned off, the relay in the module actively cuts off the connection between each battery panel (photovoltaic module) through the built-in circuit, and disconnects the connection between the photovoltaic modules to realize this function.

The abnormal shutdown function of photovoltaic modules improves the safety of the entire system and ensures the personal safety of relevant operation and maintenance personnel. Furthermore, in the traditional photovoltaic power generation system, the inside of the junction box is a bypass diode. When the photovoltaic module is abnormal, even if the bypass diode at the output end of the photovoltaic module is disconnected, the high voltage of the photovoltaic power generation system to the ground still exists. Compared with the traditional shutdown mechanism, the use of MOSFET or relay to achieve shutdown can completely disconnect the connection between photovoltaic modules and completely eliminate the risk of high voltage.

(3) Adopt high speed power line carrier (high speed power line carrier, HPLC) networking communication protocol, add HPLC communication module, make the junction box adopt high-speed broadband power carrier technology, directly use the interconnection wire between components as the transmission medium, make each Each junction box can communicate with the control gateway without additional wiring, which facilitates the upgrading of traditional junction box modules and improves the service life of photovoltaic modules.

The structure of the junction box is shown in Figure 2. Among them, the relay control module can be used to disconnect the connection between photovoltaic modules through the built-in circuit. A universal serial bus (universal serial bus, USB) debugging module can be used to debug software programs, and the function of the junction box in this application can be implemented by the microprocessor A executing the software program. The temperature module and the voltage module can be used to collect the dimension and voltage of the photovoltaic module in the junction box respectively. A power module can be used to power the junction box. The junction box can also be equipped with other modules to collect parameters such as power or current of photovoltaic modules.

In this application, the control gateway has at least the following functions:

(1) The control gateway can manage and monitor junction boxes of up to 1000 nodes, that is, establish connections with these junction boxes.

(2) Communicate with the junction box through power carrier or wireless, and transmit it to the remote monitoring center through Ethernet to realize remote management of the junction box.

Wherein, the content of communicating with the junction box may be: collecting relevant photovoltaic module parameters obtained by each junction box, and/or sending instructions to the junction box to configure the junction box and/or the photovoltaic module.

The structure of the control gateway is shown in Figure 3. Among them, the Ethernet communication module can be used to control the Ethernet communication between the gateway and the photovoltaic master station or other nodes. The HPLC communication module can be used to control the HPLC communication between the gateway and the junction box. The RS485 (or called RS-485) communication module can be used for RS485 communication between the control gateway and the inverter. A power module can be used to power the junction box. The USB debugging module can be used to debug the software program, and the function of controlling the gateway in this application can be realized by the microprocessor B executing the software program. The wireless communication module can support the control gateway to communicate wirelessly.

Next, the photovoltaic module control method provided by the embodiment of the present application is introduced, as shown in FIG. 4, the method may include the following steps:

S101: The control gateway sends first information to the target junction box. The target junction box is one of the plurality of junction boxes, and there is a one-to-one correspondence between the plurality of junction boxes and the plurality of photovoltaic modules. Wherein, the first information may be determined by the control gateway.

Wherein, the first information may be used to request data from the target junction box, and the data includes attribute information of the photovoltaic module corresponding to the target junction box. Alternatively, the first information is used for the junction box to shut down the photovoltaic assembly corresponding to the target junction box; or, the first information is used for configuring the target junction box and/or the photovoltaic assembly corresponding to the target junction box.

Optionally, Table 1 is a possible data frame format of the first information. The data frame format adds source address and destination address on the basis of the data frame format defined by the DL/T645 protocol, which is convenient for direct management of junction boxes.

Table 1

As shown in Table 1, the data start symbol is the beginning of a frame of data, and its value can be set to a specific value to identify the beginning of a data frame, such as a specific value of 68H. The control word consists of 8-bit binary fields. The source address and destination address can be the address of the target junction box, or the address of the control gateway. When the control gateway queries the data of photovoltaic modules, the control gateway is the source address, and the target junction box is the destination address. When the junction box responds to the control gateway , the junction box address is the source address, and the control gateway address is the destination address. The number of bytes in the data field is represented by the data length LEN, and the value of LEN can be carried in the data length byte. The value of the checksum (check sum, CS) is the binary arithmetic sum of each byte from the start code of the frame to the previous byte. The terminator 16H marks the end of a frame of data.

Optionally, Table 2 shows a possible format of the control word.

Table 2

As shown in Figure 2, in the 8-bit binary of the control word, D4-D0 bits are control command codes; D6-D5 bits are reserved; D7 bits are used for downlink or uplink control. Among them, D7 represents the first bit in the 8-bit binary, D5 and D6 are the second and third bits in the 8-bit binary, and so on.

Exemplarily, the specific meanings of different control words and data fields are shown in Table 3.

table 3

As shown in Table 3, for example, when the first information is used to request data from the target junction box, the control word in the first information can be configured as 0x01 to request to obtain the working state parameters, or can be configured as 0x03 to Request to obtain the address of the PV module, or it can be configured as 0x05 to request to obtain the software version number.

For another example, when the first information is used to instruct the target junction box to turn off its corresponding photovoltaic module, the control word in the first information may be configured as 0x02.

For another example, when the first information is used to configure the address of the photovoltaic component, the control word in the first information may be configured as 0x04 to configure the address of the photovoltaic component.

As another example, when the first information is used to configure the group string or string address to which the photovoltaic module belongs, the control word in the first information can be configured as 0x06, at this time the data field can indicate which string the photovoltaic module is located on, or use It is used to set string address.

Correspondingly, the target junction box receives the first information.

Optionally, the receiving and sending actions between the junction box and the control gateway in S101 above may be performed by the HPLC communication module shown in FIG. 3 .

S102: The target junction box executes an operation corresponding to the first information.

Optionally, the operation may further include the target junction box sending second information to the control gateway, where the second information may be response information to the first information. The second information may be used to indicate that the first information is received, or used to indicate that the operation is performed according to the first information.

For example, when the first information is to acquire component information (working state parameters), the target junction box may report component data (working state parameters), where the data may be carried in the second information. The frame structure of the second information may be the same as or different from that of the first information. Optionally, refer to Table 1 for the data frame structure of the second information.

Exemplarily, the specific meanings of different control words and data fields in the frame structure of the second information are shown in Table 4.

Table 4

As shown in Table 4, when the control word of the first information is configured as 0x01 to request component data, the control word of the second information can be configured as 0x81, and the data field of the second information can carry the data at this time. Wherein, the data field can carry at least one information among the voltage, temperature and relay state of the photovoltaic module through N bytes, where N is a positive integer. Wherein, the state of the relay (that is, whether the relay is currently in the off state or connected state) can be represented by 1 byte in the data field. The voltage of the photovoltaic module can be represented by 2 bytes in the data field. The temperature of the PV module can be represented by 3 bytes in the data field. Similarly, when the control words of the second information are 0x83 and 0x85, the second information can be the response information when the control words of the first information are 0x03 and 0x05 respectively, and the data fields of the second information can carry the control words of 0x83 and data at 0x85.

For another example, when the control word of the first information is configured as 0x02 to indicate to shut down the corresponding photovoltaic module, the control word of the second information can be configured as 0x82, and the target junction box can also execute the shutdown of the photovoltaic module according to the first information.

For another example, when the control word of the first information is configured as 0x04 to request configuration of the address of the photovoltaic module, the control word of the second information can be configured as 0x84, and the target junction box can also perform address configuration according to the first information. Or, when the control word of the first information is configured as 0x06 to request to set the string or string address of the photovoltaic module, the control word of the second information can be configured as 0x86, and the target junction box can also set the photovoltaic module according to the first information The group string or group string address it belongs to.

It should be understood that the relays in Table 3 and Table 4 could also be replaced by MOSFETs.

According to the above description of the possible frame structures of the first information and the second information, it can be seen that, for the junction box and the control gateway in this application, the data sent and received may follow a certain data frame format. After the entire communication network is completed, the control gateway sends the first information to each junction box in a polling manner. When the junction box receives the first information, it needs to judge whether the query component address is the same as the current component address. If they are the same, the junction box responds to the first information, that is, executes S102, otherwise the junction box can ignore the first information, or , end responding to the first message.

Using the method shown in Figure 4 above, the junction box corresponds to the photovoltaic module one by one, and the working state parameters of each photovoltaic module can be obtained in real time, stably and efficiently; the communication between the junction box and the gateway is established, so that the gateway can communicate with the The junction box communicates, obtains the data of the photovoltaic module or configures the photovoltaic module at the granularity of the photovoltaic module, instead of the solution in the prior art, which can only obtain the data of the group string composed of multiple photovoltaic modules, and configure the group string to configure. Therefore, the photovoltaic module control method provided in the embodiment of the present application can realize efficient photovoltaic module management, improve the granularity of photovoltaic module data collection, and improve communication efficiency of photovoltaic module data and related information.

The processing process of the junction box during communication will be described below with reference to FIG. 5 .

As shown in FIG. 5 , the junction box can determine whether the data frame corresponding to the first information is received, and if so, continue to determine the data frame information. Wherein, the junction box can judge whether to receive the data frame according to the start symbol and/or the end symbol of the data frame. If it is determined that the data frame is not received, the response to the first information is ended, for example, the first information may be discarded. Wherein, when judging the data frame information, the junction box can judge whether the frame header and frame tail information is correct, that is, judge whether the start symbol and the end symbol of the data frame are correct values, and if so, continue to judge whether the checksum is correct. If the frame header or frame tail is wrong, this process ends. If the junction box judges that the checksum is correct, it continues to judge whether the address of the component is correct. If the junction box judges that the checksum is wrong, this process ends. Wherein, when judging whether the module address is correct, the junction box can compare the destination address of the first information with the address of the photovoltaic module corresponding to the junction box to judge whether they are consistent, and if so, further identify the control word. If the junction box judges that the destination address of the first information is inconsistent with the address of the photovoltaic module corresponding to the junction box, the process ends. Wherein, when identifying the control word, the junction box can judge whether the control word indicates the address of the set component, and if so, set the address of the photovoltaic component according to the content of the first information data field, and then end the process. If the control word does not indicate to set the address of the component, continue to judge whether the control word indicates to read the data of the photovoltaic component. If the control word indicates to read the data of the photovoltaic module, the junction box can read the data of the photovoltaic module corresponding to the junction box from the cache, and feed the data back to the control gateway, and then end the process. If the control word does not indicate to read the data of the photovoltaic module, continue to judge whether the control word indicates to set the relay. Wherein, if the control word indicates setting the relay, the junction box sets the relay state (or changes the relay state), and feeds back the relay control result to the control gateway, and then ends the process. If the control word does not indicate to set the relay, then end this process.

It should be understood that the above process is a schematic description, and the application does not limit the order of identifying the control word. For example, after the junction box judges that the destination address of the first information is consistent with the address of the photovoltaic module corresponding to the junction box, it can also first Determine whether the control word indicates to read the data of the photovoltaic module.

The processing procedure of the control gateway during communication will be described below in conjunction with FIG. 6 .

When the control gateway is used to manage multiple junction boxes, a possible communication mode between the control gateway and the junction box. For example, the control gateway can determine whether to send information to the junction box (corresponding to the polling command stage) or Receive information from the junction box (corresponds to the receive data phase). Here, the information sent by the control gateway may be the aforementioned first information, and the information of the junction box received by the control gateway may be the second information.

Wherein, when it is necessary to control the gateway to send information, the value of the flag bit can be set as the sending status value, and then the control gateway can be in the polling command phase. When receiving is required, the value of the judgment flag can be set to the value of the receiving state, and the control gateway can be in the stage of receiving data. The value of the judgment flag can be manually set or changed conditionally according to the cycle. For example, the value of the judgment flag is cycled between the receiving state value and the sending state value according to a certain cycle, and the control gateway realizes the control for multiple junction boxes. polling send and receive.

Taking the first information for requesting photovoltaic module data and the second information including photovoltaic module working parameters as an example, when the value of the flag bit is the sending status value, the control gateway can poll to send the first A message to request the data of the photovoltaic module corresponding to each junction box. When the value of the flag bit is a receiving status value, the control gateway can determine whether the second information corresponding to the first information is received.

Optionally, the control gateway can count the number of online junction boxes (or photovoltaic modules) and/or the number of offline junction boxes (or photovoltaic modules) according to the number of first messages sent and the number of second messages successfully received. quantity. Wherein, online means that the communication between the junction box (or photovoltaic module) and the control gateway is normal, and offline means that the communication between the junction box (or photovoltaic module) and the control gateway is abnormal.

For example, the control gateway may set a counter A to count the number of polled junction boxes, and add 1 to the value of the counter each time the second information corresponding to the first information is successfully received. Successfully receiving the second information corresponding to the first information means that when the control gateway requests the data of the photovoltaic module corresponding to the target junction box from the target junction box, it receives the data used to carry the data within the response time (or response duration). second information, and successfully obtained that data. Response time can be counted by timer. For example, when (or after) the control gateway sends out the first information, the timer is started, and before the timer expires, if the second information corresponding to the first information is received, the control gateway determines that the first information corresponding to the first information has been successfully received. the second information.

As another example, the control gateway can set A counter and B counter to count the number of junction boxes that have been offline. After failing to receive the second information corresponding to the first information each time, the values of the A counter and B counter are respectively increased by 1. In addition, if the second information corresponding to the first information is successfully received, add 1 to the value of the A counter. Then the value of the B counter can indicate the number of junction boxes that are offline, and the difference between the A counter and the B counter can indicate the number of junction boxes that are online. Wherein, failing to receive the second information corresponding to the first information means that the second information is not received within the response time of receiving the second information. For example, when (or after) the control gateway sends out the first information, a timer is started, and before the timer expires, if the second information corresponding to the first information is not successfully received, the control gateway determines that the second information corresponding to the first information has not been successfully received. to the second information corresponding to the first information. Alternatively, failing to receive the second information corresponding to the first information means that the second information is not received within the response time after M times of sending the first information, where M is a positive integer greater than or equal to 2.

During the communication between the junction box and the control gateway, an interrupt mechanism is essential. In this application, timer interrupts and/or general-purpose input/output (general-purpose input/output, GPIO) interrupts may be used.

In the timer interrupt callback function, the following parameters are defined, which are used to trigger communication interruption through the time self-decrement mechanism, so as to improve CPU utilization and reasonably control data sending and receiving:

The sending time interval parameter Spacetime is used to determine the time interval between the control gateway sending the first message to the two junction boxes. After the first message is sent once, the timing of the Spacetime length is executed, and the next first message is executed when the timing expires. Sending of information.

The receiving timeout parameter Overtime is used to determine the response time. After the first message is sent, the timing of the Overtime length can be performed and the second message from the junction box can be monitored during the timing. If the control gateway does not receive the response data within the Overtime time, it will receive a timeout. Optionally, when the same junction box receives overtime for 3 consecutive times, it is determined that the junction box is offline.

Update the system time Updata_Time of the control gateway, which is used to display the time point of collecting PV module data.

In addition, the sending and receiving of data will trigger the interrupt line of PE15, which realizes GPIO interrupt. For example, the receiving (or sending) of data will cause the level change of the PE15 pin, and this level change will trigger the corresponding interrupt function, in which the processing of the received (or sent) data is realized.

Fig. 7 shows a schematic structural diagram of a photovoltaic module control device (or device) provided by an embodiment of the present application.

The electronic device in this embodiment of the present application may include a processor 701 . The processor 701 is the control center of the device, and can use various interfaces and lines to connect various parts of the device, by running or executing instructions stored in the memory 702 and calling data stored in the memory 702 . Optionally, the processor 701 may include one or more processing units, and the processor 701 may integrate an application processor and a modem processor, wherein the application processor mainly processes operating systems and application programs, and the modem processor Mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 701 . In some embodiments, the processor 701 and the memory 702 can be implemented on the same chip, and in some embodiments, they can also be implemented on independent chips.

The processor 701 may be a general-purpose processor, such as a central processing unit (CPU), a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. Realize or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps performed by the risk assessment system platform disclosed in the embodiments of the present application may be directly performed by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

In the embodiment of the present application, the memory 702 stores instructions executable by at least one processor 701, and at least one processor 701 executes the instructions stored in the memory 702 to perform the steps performed by the aforementioned control gateway or target junction box , or have the ability to control a gateway or target junction box.

The memory 702, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs and modules. Memory 702 may include at least one type of storage medium, for example, may include flash memory, hard disk, multimedia card, card memory, random access memory (Random Access Memory, RAM), static random access memory (Static Random Access Memory, SRAM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Magnetic Memory, Disk , CD, etc. Memory 702 is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 702 in the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, and is used for storing program instructions and/or data.

In the embodiment of the present application, the device may further include a communication interface 703, such as a network port, through which the electronic device can transmit data, for example, receive the risk value of the network device.

Optionally, FIG. 8 is a schematic diagram of a modular structure of another photovoltaic module control device (or device) provided in the embodiment of the present application. Wherein, in the modular structure shown in FIG. 8 , the processing module can be used to perform processing actions, and the transceiver module can be used to implement communication actions. For example, when implementing the control gateway described in the above method embodiments through this structure, the processing module can be used to generate the first information shown in S101, and the sending and receiving module sends the first information to the target junction box. When the structure is used to realize the target junction box described in the above method embodiments, the transceiver module can be used to receive the first information from the control gateway, and the processing module can be used to execute S102. The actions and functions that are specifically performed will not be described in detail here, and reference may be made to the descriptions of the foregoing method embodiments.

Optionally, the processing module 801 shown in FIG. 8 may be implemented by the processor 701 (or the processor 701 and the memory 702 ) shown in FIG. 7 , and/or the transceiver module 802 shown in FIG. 8 may be implemented by the communication interface 703 .

In addition, the device (or electronic equipment) provided in the embodiment of the present application may have the structure shown in FIG. 2 to realize the target junction box provided in the method embodiment of the present application. The device (or electronic device) provided in the embodiment of the present application may have the structure shown in FIG. 3 to implement the control gateway provided in the method embodiment of the present application.

It should be understood that in the present application, the target junction box may be regarded as one of the plurality of junction boxes. Optionally, the multiple junction boxes may have the same structure as the target junction box.

Based on the same inventive concept, the embodiments of the present application also provide a computer-readable storage medium, in which instructions can be stored, and when the instructions are run on a computer, the computer is made to perform the operation steps provided by the above method embodiments. The computer-readable storage medium may be the memory 702 shown in FIG. 7 .

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. 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, etc.) 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 the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A photovoltaic module control method, characterized in that, comprising;

The target junction box receives the first information from the control gateway, the target junction box is one of a plurality of junction boxes, and the plurality of junction boxes are in one-to-one correspondence with a plurality of photovoltaic modules;

The target junction box executes an operation corresponding to the first information;

Wherein, the first information is used to request data from the target junction box, and the data includes attribute information of the photovoltaic module corresponding to the target junction box; or,

The first information is used for the target junction box to shut down the photovoltaic module corresponding to the target junction box; or,

The first information is used to configure the target junction box and/or the photovoltaic module corresponding to the target junction box.
The method according to claim 1, wherein the target junction box performs an operation corresponding to the first information, comprising:

The target junction box sends second information to the control gateway, where the second information is response information to the first information.
The method of claim 2, wherein said first message is used to request data from said target junction box, said second message including said data.
The method of claim 1, further comprising:

The target junction box obtains working state parameters of the photovoltaic module, and the working state parameters include at least one of current, voltage, temperature or power;

The target junction box shuts down the photovoltaic component according to the working state parameter.
The method according to claim 4, wherein the target junction box shuts off the photovoltaic module according to the working state parameters, comprising:

The target junction box shuts off the photovoltaic module through a mousse tube or a relay according to the working state parameter.
A photovoltaic module control method, characterized in that, comprising;

The control gateway determines the first information;

The control gateway sends the first information to the target junction box, the target junction box is one of a plurality of junction boxes, and the plurality of junction boxes are in one-to-one correspondence with the plurality of photovoltaic modules;

Wherein, the first information is used to request data from the target junction box, and the data includes attribute information of the photovoltaic module corresponding to the target junction box; or,

The first information is used for the target junction box to shut down the photovoltaic module corresponding to the target junction box; or,

The first information is used to configure the target junction box and/or the photovoltaic module corresponding to the target junction box.
The method of claim 6, further comprising:

The control gateway receives second information from the target junction box, where the second information is response information to the first information;

The control gateway determines the number of online junction boxes among the junction boxes according to the second information.
7. The method of claim 7, wherein said first message is used to request data from said target junction box, said second message including said data.
The method of claim 6, further comprising:

The control gateway sends the first information to the target junction box N times, and does not receive the response information of the first information within the first time period after sending the first information each time, then according to the N Determine the number of offline junction boxes among the junction boxes, where N is a positive integer.
A photovoltaic module control device, characterized in that it includes a processor, and the processor is used to implement the steps of the method according to any one of claims 1-9 when executing the computer program stored in the memory.