CN114697323B - Intelligent management system, photovoltaic digital energy system and communication management method - Google Patents
Intelligent management system, photovoltaic digital energy system and communication management method Download PDFInfo
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- CN114697323B CN114697323B CN202210201269.0A CN202210201269A CN114697323B CN 114697323 B CN114697323 B CN 114697323B CN 202210201269 A CN202210201269 A CN 202210201269A CN 114697323 B CN114697323 B CN 114697323B
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- 238000004891 communication Methods 0.000 title claims abstract description 273
- 238000007726 management method Methods 0.000 title claims abstract description 53
- 238000012806 monitoring device Methods 0.000 claims abstract description 67
- 238000012544 monitoring process Methods 0.000 claims abstract description 61
- 230000004044 response Effects 0.000 claims abstract description 10
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 16
- 230000006855 networking Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000000739 chaotic effect Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/84—Measuring functions
Abstract
The invention discloses an intelligent management system, a photovoltaic digital energy system and a communication management method, wherein the intelligent management system comprises photovoltaic monitoring equipment and a communication controller, and the photovoltaic monitoring equipment is configured to monitor the running condition of a photovoltaic module in the photovoltaic system; the communication controller is connected with the photovoltaic monitoring equipment and is configured to establish a communication network between the communication controller and the photovoltaic monitoring equipment, and the communication network has a plurality of communication modes; the communication controller sends the data packet to the photovoltaic monitoring equipment, and the photovoltaic monitoring equipment responds to the data packet; the communication controller estimates the quantity of the photovoltaic monitoring devices according to the response data of the photovoltaic monitoring devices, and selects different communication modes according to the estimated quantity value of the photovoltaic monitoring devices. The invention can adapt to the scale of the photovoltaic system to select the optimal communication mode.
Description
Technical Field
The invention relates to the field of photovoltaic industry, in particular to an intelligent management system, a photovoltaic digital energy system and a communication management method.
Background
The photovoltaic power generation technology utilizes direct current output by a photovoltaic array, and the direct current is converted into alternating current through an inverter and is transmitted to a power grid. Photovoltaic power generation technology is increasingly widely used as a renewable energy power generation technology. However, in the application of the conventional photovoltaic system, the output voltage of the photovoltaic module array is high, the photovoltaic array cannot be cut off in an emergency state to eliminate the danger, and the safety risk is extremely high. In addition, in the existing photovoltaic system, electric quantity information can only be collected through an ammeter installed at a junction box, and the working state of each photovoltaic module cannot be fully monitored.
At present, a wide-range quick turn-off controller product is used, and only the cutting-off of the photovoltaic module can be controlled, so that a monitoring function cannot be provided. The existing photovoltaic monitor has the defects of short communication distance, low speed, long networking time, easy interference and the like, has the problems of larger volume, independent installation and the like, is limited in long-distance and large-scale application of a photovoltaic system, particularly in a system with huge photovoltaic modules, the traditional one-to-one PLC communication networking efficiency is lower, long time is often needed, in addition, the automatic uploading mode is short in time and suitable for a large-scale system, the communication reliability is not as good as that of a one-to-one networking mode, and the networking time is not a key problem in a small-scale photovoltaic system.
Therefore, there is a need for an intelligent management system, a photovoltaic digital energy system, and a communication management method that can adaptively adapt to the scale of the photovoltaic module and select an appropriate communication scheme.
Disclosure of Invention
The invention aims to provide an intelligent management system, a photovoltaic digital energy system and a communication management method, wherein the intelligent management system can be used for self-adapting to the scale of a photovoltaic system and selecting an optimal communication mode.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an intelligent management system for a photovoltaic system, the intelligent management system comprising:
the photovoltaic monitoring device is configured to monitor the operation condition of a photovoltaic module in the photovoltaic system;
a communication controller connected with the photovoltaic monitoring device, the communication controller being configured to establish a communication network between the communication controller and the photovoltaic monitoring device, the communication network having a plurality of communication modes;
the communication controller sends a data packet to the photovoltaic monitoring equipment, and the photovoltaic monitoring equipment responds to the data packet; and the communication controller estimates the quantity of the photovoltaic monitoring devices according to the response data of the photovoltaic monitoring devices, and selects different communication modes according to the estimated quantity value of the photovoltaic monitoring devices.
Further, a random number circuit is arranged in the photovoltaic monitoring equipment and is configured to generate a random number;
the communication controller sends probability data packets to the photovoltaic monitoring equipment, and each probability data packet limits a respective data range;
the estimating the number of photovoltaic monitoring devices includes:
the photovoltaic monitoring equipment judges whether the random number generated by the random number circuit falls into a data range limited by the received probability data packet, if so, the photovoltaic monitoring equipment selects to reply to the communication controller, otherwise, the photovoltaic monitoring equipment selects not to reply; and the communication controller estimates the number of the photovoltaic monitoring devices according to the number of the photovoltaic monitoring devices selected to be recovered.
Further, the communication mode comprises an active uploading mode and an inquiring mode; a threshold value is preset in the communication controller;
the selecting different communication modes according to the estimated value of the number of the photovoltaic monitoring devices comprises:
if the estimated value of the number of the photovoltaic monitoring devices is larger than the threshold value, the communication controller selects the uploading mode; and if the estimated value of the number of the photovoltaic monitoring devices is not greater than the threshold value, the communication controller selects the inquiry mode.
Further, a communication circuit is arranged in the communication controller, and the photovoltaic monitoring equipment is communicated with the communication controller through the communication circuit;
the communication circuit comprises a wireless communication circuit or a wired communication circuit.
Further, the communication controller is further configured to send a control instruction to the photovoltaic monitoring device so as to control the electric energy output condition of the photovoltaic monitoring device, wherein the content of the control instruction comprises increasing the electric energy output or decreasing the electric energy output or cutting off the electric energy output.
Further, the communication controller is further configured to analyze the communication condition between the communication controller and the photovoltaic monitoring device, so as to determine a target communication frequency band, wherein the communication interference of the target communication frequency band is lower than the current communication frequency band;
the determining the target communication band includes:
after the communication network is established, the photovoltaic monitoring equipment occupies full-band bandwidth and sends the operation condition of the photovoltaic module to the communication controller, and the communication controller analyzes the signal-to-noise ratios of the received signals of different sub-bands, so that the target communication band is determined.
Further, a communication expansion interface is also arranged in the communication controller; the intelligent management system also comprises a cloud server which is connected with the communication controller through the communication expansion interface, the communication controller is also configured to construct a communication network between the cloud server and the communication controller, the operation condition of the photovoltaic module is uploaded to the cloud server based on the communication network, and,
the communication controller is further configured to upload information about a communication network first established between the communication controller and the photovoltaic monitoring device to the cloud server, and,
the communication controller is further configured to control the photovoltaic monitoring device according to a remote instruction of the cloud server.
Preferably, the photovoltaic monitoring device is further configured to switch its own operating state to a protection state in response to the communication network interruption;
an auxiliary power supply is further arranged in the communication controller and is configured to supply power to the communication controller; alternatively, the communication controller is powered by an external power supply module.
A photovoltaic digital energy system comprising a photovoltaic system and an intelligent management system as described above.
The communication management method of the photovoltaic system is used for constructing a communication network between a communication controller and photovoltaic monitoring equipment;
the communication management method comprises the following steps: and responding to the instruction for constructing the communication network, and sending a data packet to the photovoltaic monitoring equipment, so that the photovoltaic monitoring equipment responds to further analyze and process the response data of the photovoltaic monitoring equipment to determine the communication mode of the communication network.
The invention has the advantages that: the method can adapt to the scale of the photovoltaic module to select a proper communication mode, and a communication network is established in time to monitor and control the output of electric energy, so that the communication speed is high and the networking time is short; and the first networking information is further combined and stored, so that the subsequent quick networking is facilitated; meanwhile, by further combining an intelligent analysis mode, the interference can be reduced, and higher communication quality is ensured; in addition, further combine with cloud server, can remote control electric energy output, it is more convenient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a logic diagram of an intelligent management system according to an embodiment of the present invention;
FIG. 2 is a block diagram of an intelligent management system according to an embodiment of the present invention;
FIG. 3 is a schematic block diagram of a communication controller provided by an embodiment of the present invention;
FIG. 4 is a flowchart illustrating an embodiment of a communication controller selecting a target communication band;
FIG. 5 is a block diagram illustrating the operation of the communication controller according to the present invention when the communication controller is an external module;
FIG. 6 is a block diagram illustrating a communication controller according to an embodiment of the present invention as an external module for wireless communication;
FIG. 7 is a block diagram illustrating the operation of the communication controller according to the present invention for wired communication when the communication controller is used as a built-in module;
fig. 8 is a block diagram of wireless communication performed when the communication controller according to the embodiment of the present invention is used as a built-in module.
Detailed Description
For better understanding of the present invention, the objects, technical solutions and advantages thereof will be more clearly understood by those skilled in the art, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the implementation manner not shown or described in the drawings is a manner known to those of ordinary skill in the art. Additionally, although examples of parameters including particular values may be provided herein, it should be appreciated that the parameters need not be exactly equal to the corresponding values, but may be approximated to the corresponding values within acceptable error margins or design constraints. It will be apparent that the described embodiments are merely some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or device.
In one embodiment of the present invention, an intelligent management system for a photovoltaic system is provided, which not only can construct a communication network to monitor and control the operation condition of photovoltaic modules, but also can adapt to the scale of the photovoltaic system (the number of photovoltaic modules) to select a proper communication mode.
As shown in fig. 2, the intelligent management system comprises a communication controller, a cloud server and photovoltaic monitoring equipment, wherein the photovoltaic module is connected with the corresponding photovoltaic monitoring equipment, the communication controller is connected with the photovoltaic monitoring equipment, and the cloud server is connected with the communication controller. It should be noted that the relationship between the photovoltaic monitoring device and the photovoltaic module in the photovoltaic system may be one-to-many or one-to-one, which does not limit the protection scope of the present invention.
The photovoltaic monitoring devices are configured to monitor the operation condition of photovoltaic modules in the photovoltaic system, each photovoltaic monitoring device is internally provided with a random number circuit, the circuit is a chaotic circuit and can comprise a capacitor, an inductor, a resistor, an active device and the like, because of the tolerance, the operation time and the subtle difference of working voltages of the devices, the states have the same occurrence probability within a certain range, the random number circuit can generate a random number along with the operation of the photovoltaic monitoring devices, the occurrence range of the random number is larger than or equal to the range of a data packet, namely a probability data packet (see below in detail), and the random number can fall into the data range set by the probability data packet with set probability. In addition, the photovoltaic monitoring device is further configured to switch its operating state to a protection state in response to a communication network disruption.
The communication controller is configured to establish a communication network between the communication controller and each photovoltaic monitoring device, and obtain the operation condition of the photovoltaic module according to the communication network, wherein the communication modes of the communication network comprise an active uploading mode, an inquiry mode and other communication modes. In this embodiment, as shown in fig. 3, the communication controller includes a main control circuit, a communication expansion interface, and an auxiliary power supply. The communication circuit is configured for communication work between the communication controller and the photovoltaic monitoring device, and can be a wireless communication circuit or a wired communication circuit, and the type of the communication circuit is specifically selected according to actual conditions, so that the protection scope of the invention is not limited. The communication expansion interface is configured to communicate between the cloud server and the communication controller. The auxiliary power supply is configured to power the communication controller, which may optionally also be powered by an external power supply module, see in particular the inverter section described below.
The specific working process of the intelligent management system comprises the following steps: responding to an instruction for constructing a communication network, and sending a data packet to the photovoltaic monitoring equipment by the communication controller, so that the photovoltaic monitoring equipment responds to the data packet; the communication controller estimates the quantity of the photovoltaic monitoring devices according to the response data of the photovoltaic monitoring devices, and selects different communication modes according to the estimated quantity value of the photovoltaic monitoring devices.
Specifically, as shown in fig. 1, when an instruction for constructing a communication network to manage a photovoltaic system is received, a communication controller (host) broadcasts and transmits probability data packets to each photovoltaic monitoring device (slave), wherein each probability data packet defines a respective data range, and each probability data packet includes data range information. Then, after each photovoltaic monitoring device receives the probability data packet, according to whether the random number falls into the range set by the probability data packet, selecting to reply or not, and taking the working process that one photovoltaic monitoring device I selects whether to reply as an example, the following description is made:
the random number circuit of the photovoltaic monitoring device I generates a random number, judges whether the random number falls into a data range defined by the probability data packet, and if the random number falls into the data range defined by the probability data packet, the photovoltaic monitoring device selects to send a reply message to the communication controller, for example: the host sends a data packet, the data packet contains a number 1 (the number is fixed in 0-9, the probability of occurrence in 1-bit integer is one tenth), the slave I starts to operate to generate a sine wave at the beginning of power-on work, the amplitude is 0-1V, the slave I immediately collects chaotic signals after receiving the host data packet, and takes out the data packet digital comparison of the last bit of the decimal point and the data packet digital comparison sent by the host, and the data packet digital comparison is recovered when the data packet digital comparison is 1 and not recovered when the data packet digital comparison is not 1.
According to the method for selecting whether to reply or not by the photovoltaic monitoring equipment, the communication controller receives a certain number of reply messages, then selects the number of the recovered photovoltaic monitoring equipment according to the number of the reply messages, and the communication controller estimates the whole number of the photovoltaic monitoring equipment in the photovoltaic system, and the communication controller needs to say that the probability is generated when the slave scale is large because the chaotic signals of different slaves are randomly generated at 0-1V, so that the scale can be roughly judged without the need of the master to receive each slave signal, because the scale is estimated, the method is not particularly accurate, and meanwhile, when the scale of the photovoltaic system is small, the number of the slaves is too small, even if the probability cannot be embodied (such as the recovery or the reply), the scale of the photovoltaic system is not large, so that the time for determining the number of the slaves by the master is greatly shortened by the method, and the networking time is further shortened.
The communication controller is preset with a threshold value, after the overall number of the photovoltaic monitoring devices is estimated approximately, the communication controller judges whether the overall number is larger than the preset threshold value, and if the overall number of the photovoltaic monitoring devices is larger than the preset threshold value, the communication controller sets an active uploading mode as a communication mode of a communication network and broadcasts the communication mode to all the photovoltaic monitoring devices; if the estimated value of the number of the photovoltaic monitoring devices is smaller than or equal to the threshold value, the communication controller selects an inquiry mode and broadcasts the communication mode to each photovoltaic monitoring device so as to complete networking. The invention selects the optimal communication mode based on the number of the devices, thereby greatly improving the communication efficiency.
After a communication network between the photovoltaic monitoring equipment and the communication controller is established, the communication controller is further configured to send a control instruction to the photovoltaic monitoring equipment so as to control the electric energy output condition of the photovoltaic monitoring equipment, wherein the content of the control instruction comprises the improvement of the electric energy output or the reduction of the electric energy output or the cutting-off of the electric energy output, and the complete cutting-off of the control photovoltaic module is a key function for realizing the safe operation of the photovoltaic system; moreover, as shown in fig. 4, the communication controller is further configured to receive the full-frequency data signal sent by the photovoltaic monitoring device, then intelligently analyze the communication condition between itself and the photovoltaic monitoring device, determine a frequency band with high communication interference, automatically avoid the interference, thereby determining that the interference is lower than the target communication frequency band of the current communication frequency band, and further select an optimal frequency band with low interference for communication, so as to implement high-quality long-distance communication.
The intelligent management system not only can establish a communication network between the communication controller and the photovoltaic monitoring equipment, but also can assemble the communication network between the communication controller and the cloud server (cloud) so that the cloud can manage the photovoltaic system through the communication network.
Specifically, the communication controller is further configured to establish a communication network between the communication controller and the cloud server, and upload the operation condition of the photovoltaic module to the cloud server based on the communication network; the communication controller is also configured to upload related information of a communication network which is firstly established between the communication controller and each photovoltaic monitoring device to the cloud server, and when the communication controller is subsequently communicated again, the communication controller can receive the networking information which is stored in the cloud, so that the time of re-networking is greatly shortened, the communication is quickly established with the photovoltaic monitoring devices, and the information interaction is realized; furthermore, the cloud server is configured to send a remote instruction to the communication controller, and the communication controller controls the photovoltaic monitoring device according to the remote instruction of the cloud server.
In addition, the communication controller can be independently installed and used, and can also be built in other devices for use. When the waterproof box is used independently, the communication controller can be fixed in an outdoor area through the waterproof box body or directly installed in a proper indoor mode to work, and power is supplied by the power module or the adapter. Because the device is small in size, the device can be used in other devices, such as an inverter, and the like, as shown in fig. 5-8, the communication controller is powered by the external device, as shown in fig. 5 and 6, not only can the communication expansion port of the communication controller device be connected with an independent communication module, or as shown in fig. 7 and 8, but also the communication circuit of the external device can be used for communicating with the cloud, and the convenient and flexible installation method provided by the invention can be suitable for various application scenes.
In one embodiment of the invention, the communication controller of the intelligent management system works cooperatively with the photovoltaic module monitoring equipment and the cloud server to monitor the working state of the photovoltaic module, control the electric energy output of the photovoltaic module and realize communication and control with the photovoltaic monitoring equipment, the communication controller and the cloud.
The communication controller mainly realizes the following functions: the communication controller adopts wireless or wired communication technology to communicate with the photovoltaic monitoring equipment; the communication controller controls the electric energy output management of the photovoltaic monitoring equipment through communication with the photovoltaic monitoring equipment, and even completely cuts off the electric energy output; the communication controller judges a frequency band with high communication interference through intelligent analysis of the communication condition of the communication equipment of the component, automatically avoids interference, selects frequency band communication at the bottom of interference, and realizes high-quality long-distance communication; the communication controller collects data information of the working states of the photovoltaic modules through communication with the photovoltaic monitoring equipment, and the photovoltaic monitoring equipment collects the operation parameters of each photovoltaic module, so that the communication controller is an important means for analyzing the historical working states and tracing fault reasons of the photovoltaic modules, and has important significance for the stable operation of the photovoltaic systems; the communication controller is connected with the communication module or equipment through a communication expansion interface, establishes communication with the cloud, uploads the monitoring information of the component, and receives a remote instruction issued by the cloud; the communication controller transmits a remote instruction issued by the cloud to the photovoltaic monitoring equipment through communication with the photovoltaic monitoring equipment; the communication controller can be independently installed and used, and can also be built in other devices for use.
In one embodiment of the invention, an intelligent photovoltaic system is provided that includes a photovoltaic module and an intelligent management system as described above. The idea of the embodiment of the intelligent photovoltaic system belongs to the same idea as the working process of the intelligent management system in the embodiment, and the whole content of the embodiment of the intelligent management system is incorporated into the embodiment of the intelligent photovoltaic system by a full-text reference mode, and is not repeated.
In one embodiment of the invention, a photovoltaic digital energy system is provided, comprising an intelligent photovoltaic system as described above and an intelligent management system. The idea of the photovoltaic digital energy system embodiment belongs to the same idea as the working process of the intelligent management system in the embodiment, and the whole content of the intelligent management system embodiment is incorporated into the photovoltaic digital energy system embodiment by a full text reference mode, and is not repeated.
In one embodiment of the present invention, a communication management method of a photovoltaic system is provided, where the communication management method is used to build a communication network between a communication controller and each photovoltaic monitoring device, and manage the photovoltaic monitoring devices based on the communication network.
The communication management method comprises the following steps: and sending the data packet to the photovoltaic monitoring equipment according to the request for building the communication network, so that the photovoltaic monitoring equipment responds, and further analyzing and processing the response data of the photovoltaic monitoring equipment to determine the communication mode of the communication network.
The idea of the embodiment of the communication management method belongs to the same idea as the working process of the intelligent management system in the embodiment, and the whole content of the embodiment of the intelligent management system is incorporated into the embodiment of the communication management method by way of full-text reference, and is not repeated.
The invention can rapidly and stably realize the communication and control among the photovoltaic monitoring equipment, the communication controller and the cloud, and provides good guarantee for the safe operation of the photovoltaic system.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention are directly or indirectly applied to other related technical fields, which are also included in the scope of the present invention.
Claims (9)
1. An intelligent management system for a photovoltaic system, the intelligent management system comprising:
the photovoltaic monitoring device is configured to monitor the operation condition of a photovoltaic module in the photovoltaic system;
the communication controller is connected with the photovoltaic monitoring equipment and is configured to establish a communication network between the communication controller and the photovoltaic monitoring equipment, the communication network has a plurality of communication modes, and the communication modes comprise an active uploading mode and an inquiring mode; a threshold value is preset in the communication controller;
the communication controller sends a data packet to the photovoltaic monitoring equipment, and the photovoltaic monitoring equipment responds to the data packet; the communication controller estimates the number of the photovoltaic monitoring devices according to the response data of the photovoltaic monitoring devices, and selects different communication modes according to the estimated number of the photovoltaic monitoring devices, and the communication controller comprises the following steps: if the estimated value of the number of the photovoltaic monitoring devices is larger than the threshold value, the communication controller selects the active uploading mode; and if the estimated value of the number of the photovoltaic monitoring devices is not greater than the threshold value, the communication controller selects the inquiry mode.
2. The intelligent management system of claim 1, wherein a random number circuit is disposed within the photovoltaic monitoring device, the random number circuit configured to generate a random number;
the communication controller sends probability data packets to the photovoltaic monitoring equipment, and each probability data packet limits a respective data range;
the estimating the number of photovoltaic monitoring devices includes:
the photovoltaic monitoring equipment judges whether the random number generated by the random number circuit falls into a data range limited by the received probability data packet, if so, the photovoltaic monitoring equipment selects to reply to the communication controller, otherwise, the photovoltaic monitoring equipment selects not to reply; and the communication controller estimates the number of the photovoltaic monitoring devices according to the number of the photovoltaic monitoring devices selected to be recovered.
3. The intelligent management system according to claim 1, wherein a communication circuit is arranged in the communication controller, and the photovoltaic monitoring device communicates with the communication controller through the communication circuit; the communication circuit comprises a wireless communication circuit or a wired communication circuit.
4. The intelligent management system of claim 1, wherein the communication controller is further configured to send control instructions to the photovoltaic monitoring device to control the power output of the photovoltaic monitoring device, wherein the content of the control instructions includes increasing power output or decreasing power output or shutting off power output.
5. The intelligent management system of claim 1, wherein the communication controller is further configured to analyze its own communication with the photovoltaic monitoring device to determine a target communication band having a communication interference lower than a current communication band;
the determining the target communication band includes:
after the communication network is established, the photovoltaic monitoring equipment occupies full-band bandwidth and sends the operation condition of the photovoltaic module to the communication controller, and the communication controller analyzes the signal-to-noise ratios of the received signals of different sub-bands, so that the target communication band is determined.
6. The intelligent management system according to claim 1, wherein a communication expansion interface is further provided in the communication controller; the intelligent management system also comprises a cloud server which is connected with the communication controller through the communication expansion interface, the communication controller is also configured to construct a communication network between the cloud server and the communication controller, the operation condition of the photovoltaic module is uploaded to the cloud server based on the communication network, and,
the communication controller is further configured to upload information about a communication network first established between the communication controller and the photovoltaic monitoring device to the cloud server, and,
the communication controller is further configured to control the photovoltaic monitoring device according to a remote instruction of the cloud server.
7. The intelligent management system of claim 1, wherein the photovoltaic monitoring device is further configured to switch its operating state to a protected state in response to the communication network disruption;
an auxiliary power supply is further arranged in the communication controller and is configured to supply power to the communication controller; alternatively, the communication controller is powered by an external power supply module.
8. A photovoltaic digital energy system, characterized in that it comprises a photovoltaic system and an intelligent management system according to any one of claims 1 to 7.
9. The communication management method of the photovoltaic system is characterized by being used for establishing a communication network between a communication controller and photovoltaic monitoring equipment;
the communication management method comprises the following steps: responding to an instruction for constructing the communication network, sending a data packet to the photovoltaic monitoring equipment, so that the photovoltaic monitoring equipment responds, analyzing and processing response data of the photovoltaic monitoring equipment, estimating the number of the photovoltaic monitoring equipment, and determining a communication mode of the communication network according to the estimated value of the number of the photovoltaic monitoring equipment; the communication mode comprises an active uploading mode and an inquiring mode; a threshold value is preset in the communication controller, and if the estimated value of the quantity of the photovoltaic monitoring devices is larger than the threshold value, the communication controller selects the active uploading mode; and if the estimated value of the number of the photovoltaic monitoring devices is not greater than the threshold value, the communication controller selects the inquiry mode.
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