CN117478170B - Communication crosstalk suppression method, management module, photovoltaic equipment and photovoltaic system - Google Patents
Communication crosstalk suppression method, management module, photovoltaic equipment and photovoltaic system Download PDFInfo
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Abstract
The application relates to a communication crosstalk suppression method, a management module, photovoltaic equipment and a photovoltaic system, wherein the method is applied to the management module in the photovoltaic system, the photovoltaic system also comprises a plurality of photovoltaic equipment groups and a plurality of confluence equipment, the photovoltaic equipment groups comprise a plurality of photovoltaic equipment, at least one photovoltaic equipment group is connected to the corresponding confluence equipment, each confluence equipment corresponds to one management module, and the method comprises the following steps: receiving a signal transmission instruction sent by an upper computer, wherein the signal transmission instruction comprises a target frequency; transmitting frequency modification signals to a plurality of photovoltaic devices based on the signal transmission instructions, wherein the frequency modification signals are used for the photovoltaic devices to adjust communication frequencies of the photovoltaic devices based on signal strengths of the received frequency modification signals and target frequencies in the frequency modification signals; the plurality of frequency modification signals comprise different target frequencies; based on the target frequency, the communication frequency of the management module is adjusted, and the signal crosstalk problem is solved by modifying the self-adaptive frequency into the long-term operation of the system.
Description
Technical Field
The present application relates to the field of power electronics technologies, and in particular, to a communication crosstalk suppression method, a management module, a photovoltaic device, and a photovoltaic system.
Background
In photovoltaic power generation systems, photovoltaic devices are becoming increasingly popular. The photovoltaic equipment is connected with a photovoltaic direct-current power supply, and functions of power optimization, monitoring, quick turn-off and the like can be realized. Typically, a plurality of photovoltaic devices are connected in parallel or in series to form a photovoltaic device group to a junction box, which may be an ac junction box, a dc junction box or a string inverter. These bussing devices may be centrally located at a convenient maintenance site, typically at a distance from the photovoltaic array, and the output cables of the photovoltaic array typically share a common bridge to the respective bussing devices.
The loops of the plurality of photovoltaic equipment groups in the bridge are close to each other, so that strong capacitive/inductive coupling exists in PLC (Power Line Communication, power line carrier communication) signals in the photovoltaic equipment groups, which are also called signal crosstalk, and the signals become noises of communication channels (a management module corresponding to one confluence equipment and the photovoltaic equipment which are mutually coupled form one communication channel), so that communication failure is caused. And because the loop length of each photovoltaic equipment group in the same photovoltaic power generation system is different, and the on-site installation of the equipment is difficult to ensure that the parasitic parameters of each photovoltaic equipment group are consistent, the crosstalk intensity in each photovoltaic equipment group is also different, and the problem is difficult to solve through unified factory setting of the photovoltaic equipment.
Disclosure of Invention
The embodiment provides a communication crosstalk suppression method, a management module, a photovoltaic device and a photovoltaic system, so as to solve the problem of signal crosstalk of the photovoltaic device communication in the related technology.
In a first aspect, in this embodiment, there is provided a communication crosstalk suppression method applied to a management module in a photovoltaic system, where the photovoltaic system further includes a plurality of photovoltaic device groups and a plurality of bus devices, the photovoltaic device groups include a plurality of photovoltaic devices, at least one of the photovoltaic device groups is connected to a corresponding bus device, and each of the bus devices corresponds to one of the management modules, and the method includes:
receiving a signal transmission instruction sent by an upper computer, wherein the signal transmission instruction comprises a target frequency;
transmitting a frequency modification signal to the plurality of photovoltaic devices based on the signal transmission instruction, wherein the frequency modification signal is used for adjusting the communication frequency of the photovoltaic devices by the photovoltaic devices based on the received signal strength of the plurality of frequency modification signals and the target frequency in the frequency modification signal; the plurality of frequency modification signals comprise different target frequencies; and
And adjusting the communication frequency of the management module based on the target frequency.
In some embodiments, the photovoltaic device determines, based on the signal strengths of the received plurality of frequency modification signals, the frequency modification signal with the greatest signal strength as a target frequency modification signal, and adjusts its communication frequency based on a target frequency in the target frequency modification signal.
In some embodiments, the frequency modification signal further includes frequency modification instructions therein for instructing the photovoltaic device to adjust its communication frequency based on a target frequency in the target frequency modification signal.
In some of these embodiments, after sending the frequency modification signal to the plurality of photovoltaic devices, sending a frequency modification instruction to the photovoltaic devices, the frequency modification instruction to instruct the photovoltaic devices to adjust their communication frequencies based on a target frequency in the target frequency modification signal.
In some of these embodiments, the frequency modification signal further comprises a packet identifier for identifying a corresponding management module for the photovoltaic device to generate packet information based on the received signal strengths of the plurality of frequency modification signals and the packet identifier in the frequency modification signal.
In some of these embodiments, the method further comprises:
And sending packet identifications to the corresponding plurality of photovoltaic devices, wherein the packet identifications are used for generating packet information by the photovoltaic devices based on the packet identifications, and the packet identifications are used for identifying the corresponding management modules.
In some of these embodiments, the method further comprises:
receiving device information sent by the corresponding plurality of photovoltaic devices;
And networking the plurality of photovoltaic devices based on the device information.
In a second aspect, in this embodiment, there is provided a communication crosstalk suppression method applied to a photovoltaic device in a photovoltaic system, where the photovoltaic system includes a plurality of photovoltaic device groups, a plurality of bus devices, and a corresponding plurality of management modules, the photovoltaic device groups include a plurality of photovoltaic devices, at least one of the photovoltaic device groups is connected to a corresponding bus device, and each of the bus devices corresponds to one of the management modules, and the method includes:
receiving a plurality of frequency modification signals which are sequentially transmitted by a plurality of management modules, wherein the target frequencies contained in the plurality of frequency modification signals are different from each other;
And adjusting the communication frequency of the photovoltaic device based on the received signal strength of the plurality of frequency modification signals and the target frequency in the frequency modification signals.
In some of these embodiments, the adjusting the communication frequency of the photovoltaic device based on the received signal strength of the plurality of frequency modification signals and the target frequency in the frequency modification signals comprises:
Determining the frequency modification signal with the maximum signal strength as a target frequency modification signal based on the signal strengths of the received plurality of frequency modification signals;
and adjusting the communication frequency of the photovoltaic device based on the target frequency in the target frequency modification signal.
In some of these embodiments, the adjusting the communication frequency of the photovoltaic device based on the target frequency of the target frequency modification signal comprises:
And automatically adjusting the communication frequency of the photovoltaic device based on the target frequency in the target frequency modification signal.
In some of these embodiments, the adjusting the communication frequency of the photovoltaic device based on the target frequency of the target frequency modification signal comprises:
And adjusting the communication frequency of the photovoltaic device based on a frequency modification instruction and a target frequency in the target frequency modification signal, wherein the frequency modification instruction is contained in the frequency modification signal or is transmitted by each management module after the frequency modification signal is transmitted.
In some of these embodiments, the method further comprises:
generating grouping information based on the signal strength of the frequency modification signal and the grouping identification; wherein the packet identification is included in the frequency modification signal, the packet identification being used to identify a corresponding management module.
In some of these embodiments, the method further comprises:
and communicating with the corresponding management module, and reporting the equipment information of the photovoltaic equipment to realize networking of the photovoltaic equipment.
In a third aspect, in this embodiment, there is provided a communication crosstalk suppression method applied to a photovoltaic system, where the photovoltaic system includes a plurality of photovoltaic device groups, a plurality of bus devices, and a corresponding plurality of management modules, the photovoltaic device groups include a plurality of photovoltaic devices, at least one of the photovoltaic device groups is connected to a corresponding bus device, and each of the bus devices corresponds to one of the management modules, and the method includes:
The plurality of management modules receive a signal transmission instruction sent by the upper computer, wherein the signal transmission instruction comprises target frequency;
the plurality of management modules sequentially send frequency modification signals to the plurality of photovoltaic devices based on the signal sending instruction, and the target frequencies contained in the plurality of frequency modification signals are different from each other;
The photovoltaic device adjusts a communication frequency of the photovoltaic device based on the received signal strengths of the plurality of frequency modification signals and a target frequency in the frequency modification signals;
The plurality of management modules adjust the communication frequency of the management modules based on the target frequency.
In a fourth aspect, in this embodiment, there is provided a management module applied to a photovoltaic system, the photovoltaic system further including a plurality of photovoltaic device groups including a plurality of photovoltaic devices and a plurality of bus devices, at least one of the photovoltaic device groups being connected to a corresponding one of the bus devices, each of the bus devices corresponding to one of the management modules, the management module including:
The first receiving module is used for receiving a signal transmission instruction sent by the upper computer, wherein the signal transmission instruction comprises target frequency;
a transmitting module, configured to transmit a frequency modification signal to the plurality of photovoltaic devices based on the signal transmission instruction, where the frequency modification signal is used for the photovoltaic devices to adjust communication frequencies thereof based on signal strengths of the received plurality of frequency modification signals and a target frequency in the frequency modification signals; the plurality of frequency modification signals comprise different target frequencies;
And the first adjusting module is used for adjusting the communication frequency of the management module based on the target frequency.
In a fifth aspect, in this embodiment, there is provided a photovoltaic device applied to a photovoltaic system including a plurality of photovoltaic device groups including a plurality of photovoltaic devices, at least one of the photovoltaic device groups being connected to a corresponding one of the bus devices, each of the bus devices corresponding to one of the management modules, a plurality of bus devices, and a corresponding plurality of management modules, the photovoltaic device including:
The second receiving module is used for receiving a plurality of frequency modification signals which are sequentially sent by the plurality of management modules, and the target frequencies contained in the plurality of frequency modification signals are different from each other;
and the second adjusting module is used for adjusting the communication frequency of the photovoltaic equipment based on the received signal strength of the plurality of frequency modification signals and the target frequency in the frequency modification signals.
In a sixth aspect, in this embodiment, there is provided a photovoltaic system including a plurality of photovoltaic device groups including a plurality of photovoltaic devices according to the fifth aspect, at least one of the photovoltaic device groups being connected to a corresponding one of the bus devices, each of the bus devices corresponding to one of the management modules according to the fourth aspect, and a plurality of bus devices, and a corresponding plurality of the management modules according to the fourth aspect.
Compared with the related art, in the communication crosstalk suppression method provided in the embodiment, the management module receives a signal transmission instruction sent by the upper computer, and the signal transmission instruction is used for controlling the management module to send a frequency modification signal and a corresponding target frequency to the photovoltaic equipment; the plurality of management modules sequentially send frequency modification signals to the plurality of photovoltaic devices based on the signal sending instructions, so that the photovoltaic devices can adjust the communication frequencies of the photovoltaic devices based on the signal intensity of the received frequency modification signals and the target frequency in the frequency modification signals, and the communication frequencies of the photovoltaic devices are different; and the communication frequency of the management module is adjusted based on the target frequency, the communication frequency modification of the photovoltaic equipment and the communication frequency modification of the management module are realized through a self-adaptive frequency modification mechanism, and the signal crosstalk problem is solved for the subsequent long-term operation of the system by distributing different communication frequencies to different channels under the condition that additional equipment or additional parameter setting is not required to be added, so that the stable operation of the system is ensured.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the other features, objects, and advantages of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a photovoltaic system according to some embodiments of the present application;
FIG. 2 is a schematic view of a photovoltaic system according to further embodiments of the present application;
FIG. 3 is a flow chart of a communication crosstalk suppression method of a management module according to some embodiments of the present application;
FIG. 4 is a schematic diagram of a communication network topology of a photovoltaic system according to some embodiments of the present application;
FIG. 5 is a flow chart of a management module networking photovoltaic devices according to some embodiments of the present application;
FIG. 6 is a flow chart of a method of communication crosstalk suppression for photovoltaic devices according to some embodiments of the present application;
FIG. 7 is a flow chart of a method of communication crosstalk suppression for a photovoltaic system according to some embodiments of the present application;
FIG. 8 is a block diagram of a management module according to some embodiments of the application;
fig. 9 is a block diagram of the structure of a photovoltaic device according to some embodiments of the present application.
Detailed Description
The present application will be described and illustrated with reference to the accompanying drawings and examples for a clearer understanding of the objects, technical solutions and advantages of the present application. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "a," "an," "the," "these" and similar terms in this application are not intended to be limiting in number, but may be singular or plural. The terms "comprising," "including," "having," and any variations thereof, as used herein, are intended to encompass non-exclusive inclusion; for example, a process, method, and system, article, or apparatus that comprises a list of steps or modules (units) is not limited to the list of steps or modules (units), but may include other steps or modules (units) not listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in this disclosure are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. Typically, the character "/" indicates that the associated object is an "or" relationship. The terms "first," "second," "third," and the like, as referred to in this disclosure, merely distinguish similar objects and do not represent a particular ordering for objects.
Fig. 1 is a schematic structural diagram of a photovoltaic system according to an embodiment of the present invention, where the photovoltaic system includes a plurality of photovoltaic device groups 10 (2 are shown in fig. 1), a plurality of bus bar devices 30 (1 are shown in fig. 1), and a corresponding plurality of management modules 20, the photovoltaic device groups 10 include a plurality of photovoltaic devices 101 (i.e., C1-Cm and C1-Cn in fig. 1), at least one photovoltaic device group 10 is connected to a corresponding bus bar device 30, and each bus bar device 30 corresponds to one management module 20. The photovoltaic device 101 is correspondingly connected to the photovoltaic dc power source 40. Those skilled in the art will appreciate that a photovoltaic system may include two or more junction devices 30, and that the junction devices 30 may have one or more input ports, and that each photovoltaic device group 10 may be connected to a respective one of the input ports of one junction device 30.
Wherein the management module 20 is in communication with each photovoltaic device 101 for group management of each photovoltaic device.
The photovoltaic device 101 may be a shutdown, an optimizer, a micro-inverter, a monitor, or the like.
The photovoltaic dc power supply 40 may be a single photovoltaic module, a plurality of photovoltaic modules connected in series and/or parallel, or a plurality of photovoltaic cell sub-strings connected in series and/or parallel.
Among them, the junction device 30 may be an inverter for inverting the direct current supplied from the photovoltaic device group 10 into alternating current and outputting it; the junction device 30 may be a dc junction box or an ac junction box, and is configured to junction the dc or ac power output from each photovoltaic module 10.
In some embodiments, the management module 20 may be integrated in the bus device 30.
Fig. 2 is a schematic structural diagram of a photovoltaic system according to another embodiment of the present invention. The plurality of photovoltaic devices 101 in the same photovoltaic device group 10 may be connected in series as shown in fig. 1 or in parallel as shown in fig. 2. The specific functions of the photovoltaic apparatus group 10, the management module 20, the junction apparatus 30, and the photovoltaic direct current power supply 40 in fig. 2 may be the same as those in fig. 1, and will not be described again here.
In an embodiment, a method for suppressing communication crosstalk is provided, and fig. 3 is a flowchart of a method for suppressing communication crosstalk according to some embodiments of the present application, as shown in fig. 3, and the method is illustrated by taking a management module in the photovoltaic system in fig. 1 or fig. 2 as an example, and includes the following steps:
step S301, a signal transmission instruction sent by the upper computer is received, where the signal transmission instruction includes a target frequency.
The upper computer is a computer or other computing equipment for sending instructions to the management module and acquiring the running state of the management module. In this embodiment, the upper computer may be a gateway device. Further, the upper computer can be in communication connection with the monitoring cloud platform. Fig. 4 is a schematic diagram of a communication network topology of a photovoltaic system according to some embodiments of the present application, as shown in fig. 4, the photovoltaic power generation system includes a plurality of management modules 20, each management module 20 corresponding to a junction device, each junction device corresponding to at least one photovoltaic device group 10 (one shown in fig. 4), the management modules 20 being in communication with each photovoltaic device connected to the junction device, such as, for example, each photovoltaic device group 10 connected to the junction device through a current transformer, and each photovoltaic device 101 being in communication with, for example, but not limited to, a power line carrier.
The photovoltaic power generation system further includes at least one gateway device 50 and a monitoring cloud platform 60. The gateway device 50 can be compatible with a plurality of different data transmission modes, and can communicate with each corresponding management module 20 and perform data transmission with the monitoring cloud platform 60 and/or APP.
The gateway device 50 sequentially sends a signal sending instruction to the management module 20 corresponding to each bus device, where the signal sending instruction includes a target frequency, and is used to control each management module 20 to send a frequency modification signal to the multiple photovoltaic devices 101, and the target frequencies corresponding to each management module are different from each other.
Step S302, a frequency modification signal is sent to a plurality of photovoltaic devices based on the signal sending instruction, and the frequency modification signal is used for the photovoltaic devices to adjust the communication frequency of the photovoltaic devices based on the signal strength of the received frequency modification signals and the target frequency in the frequency modification signals; the plurality of frequency modification signals include target frequencies that are different from each other.
Each management module 20, upon receiving the signal transmission instruction transmitted by the gateway apparatus 50, sequentially transmits a frequency modification signal to the photovoltaic apparatus 101 at the initial communication frequency. The initial signal strengths of the frequency modification signals transmitted by the respective management modules 20 may be identical. The frequency modification signal transmitted by each management module 20 includes a corresponding target frequency. The target frequencies included in the frequency modification signals transmitted by the respective management modules 20 are different. Preferably, the respective target frequencies are orthogonal.
After each photovoltaic device 101 receives the frequency modification signal sent by the management module 20, the communication frequency of the photovoltaic device is adjusted based on the signal strength of the received frequency modification signal and the target frequency z 1 included in the frequency modification signal. The initial communication frequency factory settings of each photovoltaic device 101 can be consistent.
Step S303, adjusting the communication frequency of the management module based on the target frequency.
After the photovoltaic device 101 completes the adjustment of the communication frequency, each management module 20 also adjusts the communication frequency corresponding to the local device to the target frequency z 1.
According to the communication crosstalk suppression method, a management module receives a signal transmission instruction sent by an upper computer and is used for controlling the management module to send a frequency modification signal and a corresponding target frequency to photovoltaic equipment; the plurality of management modules sequentially send frequency modification signals to the plurality of photovoltaic devices based on the signal sending instructions, so that the photovoltaic devices can adjust the communication frequencies of the photovoltaic devices based on the signal intensity of the received frequency modification signals and the target frequency in the frequency modification signals, and the communication frequencies of the photovoltaic devices are different; and the communication frequency of the management module is adjusted based on the target frequency, the communication frequency modification of the photovoltaic equipment and the communication frequency modification of the management module are realized through a self-adaptive frequency modification mechanism, and the signal crosstalk problem is solved for the subsequent long-term operation of the system by distributing different communication frequencies to different channels under the condition that additional equipment or additional parameter setting is not required to be added, so that the stable operation of the system is ensured.
In some of these embodiments, the photovoltaic device determines the frequency modification signal with the greatest signal strength as the target frequency modification signal based on the signal strengths of the received plurality of frequency modification signals, and adjusts its communication frequency based on the target frequency in the target frequency modification signal.
Specifically, each photovoltaic device compares the signal strengths of the received plurality of frequency modification signals, determines the frequency modification signal with the maximum signal strength, and adjusts its communication frequency based on the target frequency z 1 included in the frequency modification signal.
In an embodiment, the photovoltaic device may actively set the communication frequency of the photovoltaic device to the target frequency z 1 included in the target frequency modification signal after determining the target frequency modification signal.
In another embodiment, the frequency modification signal further includes frequency modification instructions for instructing the photovoltaic device to adjust its communication frequency based on the target frequency in the target frequency modification signal. After determining the target frequency modification signal, the photovoltaic device sets a communication frequency of the photovoltaic device to a target frequency z 1 based on the frequency modification instruction in the target frequency modification signal.
In yet another embodiment, after the management module sends the frequency modification signal to the plurality of photovoltaic devices, each management module in turn sends a frequency modification instruction to the photovoltaic devices, the frequency modification instruction being for instructing the photovoltaic devices to adjust their communication frequency based on the target frequency in the target frequency modification signal. And after receiving the frequency modification instruction, the photovoltaic equipment sets the communication frequency of the photovoltaic equipment to be a target frequency z 1.
The communication crosstalk suppression method in the above embodiment has the overall mechanism that the communication frequency modification of the photovoltaic equipment and the communication frequency modification of the management module are realized through the self-adaptive frequency modification mechanism by utilizing the characteristic that the crosstalk signal intensity is obviously lower than the communication signal intensity, the signal crosstalk problem is solved for the subsequent long-term operation of the system by distributing different communication frequencies to different channels, and the stable operation of the system is ensured.
Further, in some embodiments, the management module may group the photovoltaic devices while sending the frequency modification signal. The frequency modification signals further comprise grouping identifications, wherein the grouping identifications are used for identifying corresponding management modules, and the grouping identifications are used for generating grouping information by each photovoltaic device based on the received signal strength of the plurality of frequency modification signals and grouping identifications in the frequency modification signals. The packet identity is for example the ID of the management module.
For example, in one embodiment, each photovoltaic device may compare the signal strengths of the received plurality of frequency modified signals, determine the frequency modified signal with the greatest signal strength, and determine the grouping information based on the grouping identification in the frequency modified signal.
In other embodiments, the grouping of photovoltaic devices may also be performed after different channels are assigned different communication frequencies. After different channels are allocated with different communication frequencies, the communication frequencies of the management module and the photovoltaic equipment of the same channel are the same, and the communication is not interfered by signals in other channels. The method comprises the following steps:
And sending a group identifier to a plurality of corresponding photovoltaic devices, wherein the group identifier is used for generating group information by the photovoltaic devices based on the group identifier, and the group identifier is used for identifying a corresponding management module.
For example, in one embodiment, each management module sends a grouping instruction to the corresponding photovoltaic device, the grouping instruction including a grouping identification, such as an ID of the management module.
And after each photovoltaic device receives the grouping instruction sent by the corresponding management module, grouping information of the photovoltaic devices is generated based on grouping identifiers in the grouping instruction.
Further, in some embodiments, the management module may also network the photovoltaic devices after different channels are assigned different communication frequencies. After different channels are allocated with different communication frequencies, the communication frequencies of the management module and the photovoltaic equipment of the same channel are the same, and the communication is not interfered by signals in other channels. Fig. 5 is a flowchart of a management module networking a photovoltaic device according to some embodiments of the present application, as shown in fig. 5, the flowchart including the steps of:
Step S501, receiving device information sent by a plurality of corresponding photovoltaic devices.
In an embodiment, each photovoltaic device actively transmits a report signal to a corresponding management module, where the report signal includes device information of the photovoltaic device.
In another embodiment, each management module sends a device information reporting instruction, where the device information reporting instruction indicates all photovoltaic devices on the channel to report device information.
Step S502, networking the plurality of photovoltaic devices based on the device information.
Each management module can acquire the equipment information of all the photovoltaic equipment of the channel according to the equipment information reported by the corresponding photovoltaic equipment, so as to carry out networking. Each management module acquires the equipment information of all the photovoltaic equipment connected with the corresponding bus equipment, and then sends a signal instruction comprising the equipment information and the logic address to the corresponding photovoltaic equipment so as to realize networking.
According to the communication crosstalk suppression method, equipment information of corresponding photovoltaic equipment in the channel is obtained by receiving the equipment information sent by the corresponding plurality of photovoltaic equipment; by networking the plurality of photovoltaic devices based on the device information, the communication efficiency of the management module and the photovoltaic devices of the same channel is improved.
In an embodiment, there is further provided a communication crosstalk suppression method, and fig. 6 is a flowchart of a communication crosstalk suppression method according to some embodiments of the present application, and as shown in fig. 6, the method is applied to a photovoltaic device in the photovoltaic system in fig. 1 or fig. 2, and illustrated by way of example, and includes the following steps:
in step S601, a plurality of frequency modification signals sequentially transmitted by a plurality of management modules are received, where the plurality of frequency modification signals include different target frequencies.
Each photovoltaic device receives the frequency modification signals sent by the plurality of management modules in sequence, and the target frequencies included in the frequency modification signals sent by the management modules are different. Preferably, the respective target frequencies are orthogonal.
Step S602, adjusting a communication frequency of the photovoltaic device based on the signal strength of the received plurality of frequency modification signals and the target frequency in the frequency modification signals.
The photovoltaic device adjusts a communication frequency of the photovoltaic device based on the signal strength of the received frequency modification signal and a target frequency included in the frequency modification signal. The initial communication frequency factory settings of the individual photovoltaic devices may be consistent.
According to the communication crosstalk suppression method, the photovoltaic equipment receives the plurality of frequency modification signals sent by the plurality of management modules in sequence, adjusts the communication frequency of the photovoltaic equipment based on the signal intensity of the received plurality of frequency modification signals and the target frequency in the frequency modification signals, realizes the communication frequency modification of the photovoltaic equipment through the self-adaptive frequency modification mechanism, and solves the signal crosstalk problem for the subsequent system long-term operation by distributing different communication frequencies to different channels under the condition that additional equipment is not needed or additional parameter setting is not needed, so that the stable operation of the system is ensured.
In an embodiment, adjusting the communication frequency of the photovoltaic device based on the signal strength of the received plurality of frequency modification signals and the target frequency in the frequency modification signals comprises:
Determining the frequency modification signal with the maximum signal strength as a target frequency modification signal based on the signal strengths of the received plurality of frequency modification signals;
the communication frequency of the photovoltaic device is adjusted based on the target frequency in the target frequency modification signal.
In an embodiment, adjusting the communication frequency of the photovoltaic device based on the target frequency of the target frequency modification signal comprises:
the communication frequency of the photovoltaic device is automatically adjusted based on the target frequency in the target frequency modification signal.
In an embodiment, adjusting the communication frequency of the photovoltaic device based on the target frequency of the target frequency modification signal comprises:
the communication frequency of the photovoltaic device is adjusted based on the frequency modification instruction and a target frequency in the target frequency modification signal, wherein the frequency modification instruction is contained in the frequency modification signal or the frequency modification instruction is transmitted by each management module after the frequency modification signal is transmitted.
In an embodiment, the method further comprises:
Generating grouping information based on the signal strength of the frequency-modified signal and the grouping identification; wherein a packet identification is included in the frequency modification signal, the packet identification being used to identify the corresponding management module.
In an embodiment, the method further comprises:
and communicating with a corresponding management module, and reporting the equipment information of the photovoltaic equipment to realize networking of the photovoltaic equipment.
It should be noted that, specific examples in the embodiments corresponding to the photovoltaic devices may refer to examples described in the embodiments corresponding to the management module and the optional implementation manner, and are not described in detail in the photovoltaic device embodiments.
In an embodiment, there is further provided a method for suppressing communication crosstalk, and fig. 7 is a flowchart of a method for suppressing communication crosstalk according to some embodiments of the present application, as shown in fig. 7, and the method is applied to the photovoltaic system in fig. 1 or fig. 2, for example, and includes the following steps:
In step S701, the plurality of management modules receive a signal transmission instruction sent by the upper computer, where the signal transmission instruction includes a target frequency.
The upper computer sequentially sends a signal sending instruction to the management modules corresponding to the confluence devices, wherein the signal sending instruction comprises target frequencies and is used for controlling the management modules to send frequency modification signals to the photovoltaic devices, and the target frequencies corresponding to the management modules are different.
In step S702, the plurality of management modules sequentially send frequency modification signals to the plurality of photovoltaic devices based on the signal sending instruction, where the plurality of frequency modification signals include different target frequencies.
After each management module receives a signal sending instruction sent by the upper computer, frequency modification signals are sequentially sent to the photovoltaic equipment according to the initial communication frequency. The initial signal strengths of the frequency modification signals transmitted by the respective management modules may be identical. The frequency modification signals sent by the management modules comprise corresponding target frequencies. The target frequencies included in the frequency modification signals transmitted by the respective management modules are different. Preferably, the respective target frequencies are orthogonal.
In step S703, the photovoltaic device adjusts the communication frequency of the photovoltaic device based on the signal strength of the received plurality of frequency modification signals and the target frequency in the frequency modification signals.
After each photovoltaic device receives the frequency modification signal sent by the management module, the communication frequency of the photovoltaic device is adjusted based on the signal strength of the received frequency modification signal and the target frequency included in the frequency modification signal. The initial communication frequency factory settings of the individual photovoltaic devices may be consistent.
In step S704, the plurality of management modules adjust the communication frequency of the management modules based on the target frequency.
After the photovoltaic equipment completes the adjustment of the communication frequency, each management module adjusts the communication frequency corresponding to the local machine to be the target frequency.
According to the communication crosstalk suppression method, a plurality of management modules are used for receiving signal transmission instructions sent by an upper computer and used for controlling the management modules to send frequency modification signals and corresponding target frequencies to photovoltaic equipment; sequentially sending frequency modification signals to a plurality of photovoltaic devices based on the signal sending instructions through a plurality of management modules so that the photovoltaic devices receive the frequency modification signals corresponding to the plurality of management modules; the communication frequencies of the photovoltaic devices are adjusted based on the signal intensity of the received frequency modification signals and the target frequency in the frequency modification signals through the photovoltaic devices, so that the communication frequencies of the photovoltaic devices are different from each other, and signal crosstalk is avoided; the communication frequency of the management module is adjusted based on the target frequency through the plurality of management modules, the communication frequency of the photovoltaic equipment and the communication frequency of the management module are modified through the self-adaptive frequency modification mechanism, and the problem of signal crosstalk is solved for the subsequent long-term operation of the system by distributing different communication frequencies to different channels under the condition that additional equipment or additional parameter setting is not required to be added, so that the stable operation of the system is ensured.
In an embodiment, there is further provided a management module applied to the photovoltaic system shown in fig. 1 or fig. 2, and fig. 8 is a block diagram of the management module according to some embodiments of the present application, as shown in fig. 8, where the management module includes:
A first receiving module 801, configured to receive a signal transmission instruction sent by an upper computer, where the signal transmission instruction includes a target frequency;
A transmitting module 802, configured to transmit, based on the signal transmission instruction, a frequency modification signal to the plurality of photovoltaic devices, where the frequency modification signal is used for the photovoltaic devices to adjust the communication frequency thereof based on the signal strength of the received plurality of frequency modification signals and the target frequency in the frequency modification signal; the plurality of frequency modification signals comprise different target frequencies;
A first adjusting module 803, configured to adjust the communication frequency of the management module based on the target frequency.
In an embodiment, the photovoltaic device determines, based on the signal strengths of the received plurality of frequency modification signals, the frequency modification signal with the largest signal strength as the target frequency modification signal, and adjusts the communication frequency thereof based on the target frequency in the target frequency modification signal.
In an embodiment, the frequency modification signal further includes frequency modification instructions for instructing the photovoltaic device to adjust its communication frequency based on the target frequency in the target frequency modification signal.
In an embodiment, the sending module is further configured to:
After sending the frequency modification signal to the plurality of photovoltaic devices, sending a frequency modification instruction to the photovoltaic devices, the frequency modification instruction being for instructing the photovoltaic devices to adjust their communication frequency based on a target frequency in the target frequency modification signal.
In an embodiment, the frequency modification signal further comprises a packet identifier for identifying a corresponding management module for the photovoltaic device to generate the packet information based on the received signal strengths of the plurality of frequency modification signals and the packet identifier in the frequency modification signal.
In an embodiment, the management module further comprises:
And the second sending module is used for sending grouping identifiers to the corresponding plurality of photovoltaic devices, wherein the photovoltaic devices generate grouping information based on the grouping identifiers, and the grouping identifiers are used for identifying the corresponding management modules.
In an embodiment, the management module further comprises:
the third receiving module is used for receiving the equipment information sent by the corresponding plurality of photovoltaic equipment;
and the networking module is used for networking a plurality of photovoltaic devices based on the device information.
In an embodiment, there is further provided a photovoltaic apparatus applied to the photovoltaic system shown in fig. 1 or fig. 2, and fig. 9 is a block diagram of the photovoltaic apparatus according to some embodiments of the present application, as shown in fig. 9, including:
A second receiving module 901, configured to receive a plurality of frequency modification signals sequentially sent by a plurality of management modules, where the plurality of frequency modification signals include different target frequencies;
a second adjustment module 902 is configured to adjust a communication frequency of the photovoltaic device based on the signal strength of the received plurality of frequency modification signals and the target frequency in the frequency modification signals.
In an embodiment, the adjusting module is specifically configured to:
Determining the frequency modification signal with the maximum signal strength as a target frequency modification signal based on the signal strengths of the received plurality of frequency modification signals;
the communication frequency of the photovoltaic device is adjusted based on the target frequency in the target frequency modification signal.
In an embodiment, the adjusting module is specifically configured to:
the communication frequency of the photovoltaic device is automatically adjusted based on the target frequency in the target frequency modification signal.
In an embodiment, the adjusting module is specifically configured to:
the communication frequency of the photovoltaic device is adjusted based on the frequency modification instruction and a target frequency in the target frequency modification signal, wherein the frequency modification instruction is contained in the frequency modification signal or the frequency modification instruction is transmitted by each management module after the frequency modification signal is transmitted.
In an embodiment, the photovoltaic device further comprises:
The generation module is used for generating grouping information based on the signal strength of the frequency modification signal and the grouping identification; wherein a packet identification is included in the frequency modification signal, the packet identification being used to identify the corresponding management module.
In an embodiment, the photovoltaic device further comprises:
and the communication module is used for communicating with the corresponding management module and reporting the equipment information of the photovoltaic equipment so as to realize networking of the photovoltaic equipment.
The specific limitations regarding the management module and the photovoltaic device may be referred to above as the limitations regarding the communication crosstalk suppression method, and will not be described herein. The above-described management modules and individual modules in the photovoltaic device may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
It should be noted that, specific examples in this embodiment may refer to examples described in the foregoing embodiments and alternative implementations, and are not described in detail in this embodiment.
It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to be limiting. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure in accordance with the embodiments provided herein.
It is to be understood that the drawings are merely illustrative of some embodiments of the present application and that it is possible for those skilled in the art to adapt the present application to other similar situations without the need for inventive work. In addition, it should be appreciated that while the development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as a departure from the disclosure.
The term "embodiment" in this disclosure means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive. It will be clear or implicitly understood by those of ordinary skill in the art that the embodiments described in the present application can be combined with other embodiments without conflict.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the patent claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (15)
1. A communication crosstalk suppression method applied to a management module in a photovoltaic system, the photovoltaic system further comprising a plurality of photovoltaic device groups and a plurality of bus devices, the photovoltaic device groups comprising a plurality of photovoltaic devices, at least one of the photovoltaic device groups being connected to a corresponding one of the bus devices, each of the bus devices corresponding to one of the management modules, the method comprising:
receiving a signal transmission instruction sent by an upper computer, wherein the signal transmission instruction comprises a target frequency;
transmitting frequency modification signals to the plurality of photovoltaic devices based on the signal transmission instructions, wherein the frequency modification signals are used for determining that the frequency modification signal with the maximum signal strength is a target frequency modification signal based on the signal strength of the plurality of frequency modification signals which are sequentially transmitted by the received management modules by the photovoltaic devices, and adjusting the communication frequency of the photovoltaic devices based on the target frequency in the target frequency modification signal; the plurality of frequency modification signals comprise different target frequencies; and
And adjusting the communication frequency of the management module based on the target frequency.
2. The method of claim 1, further comprising frequency modification instructions in the frequency modification signal for instructing the photovoltaic device to adjust its communication frequency based on a target frequency in the target frequency modification signal.
3. The method of claim 1, wherein after sending the frequency modification signal to the plurality of photovoltaic devices, sending a frequency modification instruction to the photovoltaic devices, the frequency modification instruction to instruct the photovoltaic devices to adjust their communication frequency based on a target frequency in the target frequency modification signal.
4. The method of claim 1, wherein the frequency modification signal further comprises a packet identification for identifying a corresponding management module for the photovoltaic device to generate packet information based on the received signal strengths of the plurality of frequency modification signals and the packet identification in the frequency modification signal.
5. The method according to claim 1, wherein the method further comprises:
And sending packet identifications to the corresponding plurality of photovoltaic devices, wherein the packet identifications are used for generating packet information by the photovoltaic devices based on the packet identifications, and the packet identifications are used for identifying the corresponding management modules.
6. The method according to claim 1, wherein the method further comprises:
receiving device information sent by the corresponding plurality of photovoltaic devices;
And networking the plurality of photovoltaic devices based on the device information.
7. A communication crosstalk suppression method applied to a photovoltaic device in a photovoltaic system, the photovoltaic system including a plurality of photovoltaic device groups, a plurality of bus devices, and a corresponding plurality of management modules, the photovoltaic device groups including a plurality of photovoltaic devices, at least one of the photovoltaic device groups being connected to a corresponding bus device, each of the bus devices corresponding to one of the management modules, the method comprising:
receiving a plurality of frequency modification signals which are sequentially transmitted by a plurality of management modules, wherein the target frequencies contained in the plurality of frequency modification signals are different from each other;
Determining the frequency modification signal with the maximum signal strength as a target frequency modification signal based on the signal strengths of the received plurality of frequency modification signals; and adjusting the communication frequency of the photovoltaic device based on the target frequency in the target frequency modification signal.
8. The method of claim 7, wherein adjusting the communication frequency of the photovoltaic device based on the target frequency of the target frequency modification signal comprises:
And automatically adjusting the communication frequency of the photovoltaic device based on the target frequency in the target frequency modification signal.
9. The method of claim 7, wherein adjusting the communication frequency of the photovoltaic device based on the target frequency of the target frequency modification signal comprises:
And adjusting the communication frequency of the photovoltaic device based on a frequency modification instruction and a target frequency in the target frequency modification signal, wherein the frequency modification instruction is contained in the frequency modification signal or is transmitted by each management module after the frequency modification signal is transmitted.
10. The method of claim 7, wherein the method further comprises:
generating grouping information based on the signal strength of the frequency modification signal and the grouping identification; wherein the packet identification is included in the frequency modification signal, the packet identification being used to identify a corresponding management module.
11. The method of claim 7, wherein the method further comprises:
and communicating with the corresponding management module, and reporting the equipment information of the photovoltaic equipment to realize networking of the photovoltaic equipment.
12. A communication crosstalk suppression method applied to a photovoltaic system, the photovoltaic system including a plurality of photovoltaic device groups, a plurality of bus devices, and a corresponding plurality of management modules, the photovoltaic device groups including a plurality of photovoltaic devices, at least one of the photovoltaic device groups being connected to a corresponding one of the bus devices, each of the bus devices corresponding to one of the management modules, the method comprising:
The plurality of management modules receive a signal transmission instruction sent by the upper computer, wherein the signal transmission instruction comprises target frequency;
the plurality of management modules sequentially send frequency modification signals to the plurality of photovoltaic devices based on the signal sending instruction, and the target frequencies contained in the plurality of frequency modification signals are different from each other;
the photovoltaic equipment determines the frequency modification signal with the maximum signal strength as a target frequency modification signal based on the received signal strengths of the plurality of frequency modification signals; adjusting a communication frequency of the photovoltaic device based on a target frequency in the target frequency modification signal;
The plurality of management modules adjust the communication frequency of the management modules based on the target frequency.
13. A management module applied to a photovoltaic system, the photovoltaic system further comprising a plurality of photovoltaic device groups and a plurality of bus devices, the photovoltaic device groups comprising a plurality of photovoltaic devices, at least one of the photovoltaic device groups being connected to a corresponding one of the bus devices, each of the bus devices corresponding to one of the management modules, the management module comprising:
The first receiving module is used for receiving a signal transmission instruction sent by the upper computer, wherein the signal transmission instruction comprises target frequency;
The sending module is used for sending frequency modification signals to the plurality of photovoltaic devices based on the signal sending instruction, the frequency modification signals are used for determining that the frequency modification signal with the maximum signal strength is a target frequency modification signal based on the received signal strength of the plurality of frequency modification signals sent by the management modules in sequence by the photovoltaic devices, and the communication frequency of the frequency modification signal is adjusted based on the target frequency in the target frequency modification signal; the plurality of frequency modification signals comprise different target frequencies;
And the first adjusting module is used for adjusting the communication frequency of the management module based on the target frequency.
14. A photovoltaic device for use in a photovoltaic system comprising a plurality of photovoltaic device groups, a plurality of bus devices and a corresponding plurality of management modules, the photovoltaic device groups comprising a plurality of photovoltaic devices, at least one of the photovoltaic device groups being connected to a corresponding one of the bus devices, each of the bus devices corresponding to one of the management modules, the photovoltaic device comprising:
The second receiving module is used for receiving a plurality of frequency modification signals which are sequentially sent by the plurality of management modules, and the target frequencies contained in the plurality of frequency modification signals are different from each other;
The second adjusting module is used for determining the frequency modification signal with the maximum signal strength as a target frequency modification signal based on the received signal strengths of the plurality of frequency modification signals; and adjusting the communication frequency of the photovoltaic device based on the target frequency in the target frequency modification signal.
15. A photovoltaic system comprising a plurality of photovoltaic device groups, a plurality of bus devices and a corresponding plurality of management modules according to claim 13, the photovoltaic device groups comprising a plurality of photovoltaic devices according to claim 14, at least one of the photovoltaic device groups being connected to a corresponding one of the bus devices, one of the management modules for each of the bus devices.
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