CN115988003A - Distributed photovoltaic data mutual transmission and complementary full transmission method and system - Google Patents
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Abstract
The invention relates to a distributed photovoltaic data mutual transmission and complement full transmission method, which comprises the following steps: s1: establishing data transmission connection for two of the plurality of distributed photovoltaic nodes based on the complementary transmission control field; s2: judging whether the data to be transmitted is received or not based on the complementary transmission control field, if not, transmitting the data between the two distributed photovoltaic nodes, and if so, ending the transmission; s3: and each distributed photovoltaic node and other distributed photovoltaic nodes complete data transmission according to the steps S1-S2. A distributed photovoltaic data mutual transmission and complementation complete transmission system is used for achieving a distributed photovoltaic data mutual transmission and complementation complete transmission method and comprises a main station layer, a communication layer and a terminal layer. The invention improves the transmission efficiency; the decentralized multi-node mutual transmission is realized, the reliability of data can be greatly improved, the occurrence probability that data cannot be transmitted due to the fact that transmission of individual equipment fails is greatly reduced, and the method is more economical and stable.
Description
Technical Field
The invention relates to the field of photovoltaic data transmission, in particular to a distributed photovoltaic data mutual transmission complementary full transmission method and a system.
Background
The global energy shortage and the environmental pollution problem are becoming more serious, and the utilization rate of solar energy as a clean energy which is safe and clean at present and has huge reserve potential is continuously improved, wherein photovoltaic power generation is the most mainstream application mode. Under the strategic influence of China, the distributed roof photovoltaic has huge development potential. Different from a centralized photovoltaic power station, the distributed roof photovoltaic does not need additional land resources, so that the economic cost is low, and the installation is convenient and fast. Unlike a centralized photovoltaic power station, which can detect possible faults by the arrival of operation and maintenance personnel at the site or by the monitoring of electrical parameters by a unified device, the detection of faults by distributed rooftop photovoltaic generally relies on the monitoring of electrical parameters. However, the photovoltaic monomer of the distributed roof has smaller power generation amount and more dispersed distribution positions, so that the requirement on the quality of data transmission is higher. The existing data transmission method has certain limitation on roof photovoltaic electrical parameter data transmission, so that the improvement of the reliability and stability of the data transmission of the distributed roof photovoltaic has great significance on the distributed roof photovoltaic power generation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a distributed photovoltaic data mutual transmission complementary full transmission method and a system, and improves the transmission efficiency; the reliability of data is greatly improved, the probability of occurrence that data cannot be transmitted due to the fact that transmission of individual equipment fails is greatly reduced, and the method is more economical and stable.
The purpose of the invention is realized by the following technical scheme:
a distributed photovoltaic data mutual transmission and complement full transmission method comprises the following steps:
s1: establishing data transmission connection for two of the plurality of distributed photovoltaic nodes based on the mutual transmission complementary full control field;
s2: judging whether the data to be transmitted is received or not based on the complementary transmission control field, if not, transmitting the data between the two distributed photovoltaic nodes, and if so, ending the transmission;
s3: and each distributed photovoltaic node and other distributed photovoltaic nodes complete data transmission according to the steps S1-S2.
Further, after step S3, the following steps are performed:
s4: and randomly selecting part of distributed photovoltaic nodes to send data information to the relay gateway, and then uploading the data to the cloud platform by the relay gateway.
Further, the data transmission connection is established by waving hands once through two handshakes.
Further, the complementary full control field comprises a flag bit layer, a sequence number layer, a sliding window layer and a data cladding layer.
Further, the zone bit layer includes a connection status zone bit, a transmission status zone bit, a breakpoint and retransmission zone bit, a transmission number zone bit, a reception confirmation zone bit, a time zone bit, a transmission/reception zone bit, and a transmission round completion zone bit.
Further, the format of the mutual transmission complement control field is as follows:
the first layer is the flag bit layer, and the 32 bits of the first layer are:
a flag bit T0 of 1 bit of the first character represents a connection state, and when the T0 is 0, no connection exists; t0 is a connection state flag bit;
a flag bit T1 of a 1 bit of a second character and a flag bit T2 of a 1 bit of a third character represent transmission states, wherein when T0 is 1 and T1 is 0, transmission is represented, and when T2 is 1, transmission is represented to be finished; t1 and T2 are transmission status flag bits;
a flag bit T3 of the 1 bit of the fourth character represents a breakpoint continuous transmission state;
the fifth character and the sixth character are respectively 1-bit zone bits T4 and T5 which represent breakpoint positions, and the breakpoint positions are recorded by T4 and T5 when T3 is 1;
a flag bit T6 of a 1 bit of a seventh character represents a retransmission state, and data is retransmitted when T6 is 1;
T3-T6 are breakpoint and retransmission flag bits;
a flag bit T7 of the eighth character 1 bit for indicating the number of times of transmission of the current data; t7 is a sending frequency zone bit;
the 1 bit zone bit T8 of the ninth character, if T8 is 1, the receiver confirmation is received;
when the flag bit T9 of the 1 bit of the tenth character is 1, the T9 indicates that the transmission is finished but the confirmation of the receiver is not received; t8 and T9 are receiving confirmation flag bits;
the eleventh and twelfth characters are respectively 1-bit zone bits T10 and T11 which represent time marks; t10 and T11 are time flag bits;
a flag bit T12 of the 1 bit of the thirteenth character, wherein if T12 is 1, the sending end is used, and if T12 is 0, the receiving end is used; t12 is a transmitting/receiving zone bit;
the flag bit T13 of the 1 st bit of the fourteenth bit is 1, and the T13 is 1, which indicates that one round of data transmission is completed; t13 is a transmission wheel completion flag bit;
the rest bits are reserved bits and represent the user information of the received data at present;
the serial number layer comprises a second layer and a third layer;
the second layer is a 36-bit sequence number: marking the sequence of the electrical parameter and environmental parameter information of the sending data packet, marking the user contained in the data, and comparing the user contained in the data with the receiving party to complete the data and update the zone bit;
the third layer is a 16-bit serial number, and marks the serial number of the data packet which is continuously transmitted at the breakpoint or needs to be retransmitted;
the fourth layer is a sliding window layer, is a 32-bit sliding window, and controls the sending and receiving of data according to the sending or receiving conversion;
and the fifth layer is a data cladding and transmits all the electrical parameter and environmental parameter data.
A distributed photovoltaic data mutual transmission and complementation complete transmission system is used for achieving a distributed photovoltaic data mutual transmission and complementation complete transmission method and comprises a main station layer, a communication layer and a terminal layer.
Further, the terminal layer comprises a data acquisition module, a data processing module, a data storage module and a data transmission module.
The invention has the beneficial effects that:
by judging whether the data to be transmitted is received or not, the data transmission quantity is reduced, the completion of the data is realized, and the transmission efficiency is improved; through two pairwise transmission between the distributed photovoltaic nodes, decentralized multi-node mutual transmission is achieved, the reliability of data can be greatly improved, the occurrence probability that data cannot be transmitted due to the fact that individual equipment fails in transmission is greatly reduced, and the distributed photovoltaic node mutual transmission method is more economical and stable.
Drawings
FIG. 1 is an overall flow diagram of the present invention;
FIG. 2 is a network architecture diagram of the present invention;
FIG. 3 is a schematic of the system of the present invention;
FIG. 4 is a schematic diagram of the control Bao Wen format of the present invention;
fig. 5 is a schematic diagram of the node transmitting data completion according to the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The first embodiment is as follows:
as shown in fig. 1 to 5, a distributed photovoltaic data complementary full transmission method includes the following steps:
s1: establishing data transmission connection for two of the plurality of distributed photovoltaic nodes based on the mutual transmission complementary full control field;
the data transmission connection is established by shaking hands twice and waving hands once;
taking four distributed photovoltaic nodes with ABCD as an example, A initiates a handshake to B, B initiates a hand waving to A, A is a sending end, and B is a receiving end; checking whether B is transmitting (namely checking the connection state zone bit of B), if so, changing the respective control zone bit and timing, and then preparing connection to start transmission; b, the A again holds hands, and the A and the B establish connection to start data transmission;
s2: judging whether the data to be transmitted is received or not based on the complementary transmission control field, if not, transmitting the data between the two distributed photovoltaic nodes, and if so, ending the transmission;
for example, after the node a transmits to the node B, the node B has data A, B, so that when the node a establishes a connection with the node C to transmit data after the node B and the node C complete transmission, it can be known that the data information of the node a is repeated by mutually transmitting the first layer flag bit information and the second layer sequence number information of the complementary control field, and it can be selected to omit the information of the node a to complete other information, thereby increasing the efficiency of data transmission.
After transmission starts, the received user information is detected through a system, the first layer flag bit and the second layer sequence number information of the complementary full control field are recorded and changed, receiving confirmation data transmission is sent through a fourth layer sliding window, after receiving is completed, a group of instructions are sent to A by B to confirm that transmission is completed, transmission channels are mutually closed, and data transmission with other distributed photovoltaic nodes is prepared to start;
s3: and each distributed photovoltaic node and other distributed photovoltaic nodes complete data transmission according to the steps S1-S2.
S4: and randomly selecting part of the distributed photovoltaic nodes to send data information to the relay gateway, and then uploading the data to the cloud platform by the relay gateway.
After each distributed photovoltaic node of the ABCD and other distributed photovoltaic nodes complete a data transmission process of sending and receiving, each distributed photovoltaic node has data information of all the distributed photovoltaic nodes, and at the moment, two distributed photovoltaic nodes are randomly selected to send the data information to the relay gateway. And after the data are received, the relay gateway uploads the two groups of received data to the cloud platform, and the cloud platform receives the check data to complete a complete transmission process.
By judging whether the data to be transmitted is received or not, the data transmission quantity is reduced, the completion of the data is realized, and the transmission efficiency is improved; through two pairwise transmission between the distributed photovoltaic nodes, decentralized multi-node mutual transmission is achieved, the reliability of data can be greatly improved, the occurrence probability that data cannot be transmitted due to the fact that individual equipment fails in transmission is greatly reduced, and the distributed photovoltaic node mutual transmission method is more economical and stable.
The complementary full control field comprises a flag bit layer, a sequence number layer, a sliding window layer and a data cladding layer.
The zone bit layer comprises a connection state zone bit, a transmission state zone bit, a breakpoint and retransmission zone bit, a sending time zone bit, a receiving confirmation zone bit, a time zone bit, a sending/receiving zone bit and a transmission wheel completion zone bit.
The format of the mutual transmission complementary full control field is as follows:
the first layer is the flag bit layer, and the 32 bits of the first layer are:
a flag bit T0 of 1 bit of the first character represents a connection state, and when the T0 is 0, no connection exists; t0 is a connection state flag bit;
a flag bit T1 of a 1 bit of a second character and a flag bit T2 of a 1 bit of a third character represent transmission states, wherein when T0 is 1 and T1 is 0, transmission is represented, and when T2 is 1, transmission is represented to be finished; t1 and T2 are transmission status flag bits;
a flag bit T3 of the 1 bit of the fourth character represents a breakpoint continuous transmission state;
the fifth character and the sixth character are respectively 1-bit zone bits T4 and T5 which represent breakpoint positions, and the breakpoint positions are recorded by T4 and T5 when T3 is 1;
a flag bit T6 of a 1 bit of a seventh character represents a retransmission state, and data is retransmitted when T6 is 1;
T3-T6 are breakpoints and retransmission flag bits;
a flag bit T7 of the eighth character 1 bit for indicating the number of times of transmission of the current data; t7 is a flag bit of the sending times;
the 1 bit zone bit T8 of the ninth character, if T8 is 1, the receiver confirmation is received;
when the flag bit T9 of the 1 bit of the tenth character is 1, the T9 indicates that the transmission is finished but the confirmation of the receiver is not received; t8 and T9 are receiving confirmation flag bits;
the eleventh and twelfth characters are respectively 1-bit zone bits T10 and T11 which represent time marks; t10 and T11 are time flag bits;
a flag bit T12 of the 1 bit of the thirteenth character, wherein if the T12 is 1, the sending end is the receiving end, and if the T12 is 0, the receiving end is the receiving end; t12 is a transmitting/receiving zone bit;
the flag bit T13 of the 1 st bit of the fourteenth bit is 1, and the T13 is 1, which indicates that one round of data transmission is completed; t13 is a transmission wheel completion flag bit;
the rest bits are reserved bits and represent the user information of the received data at present;
the serial number layer comprises a second layer and a third layer;
the second layer is a 36-bit sequence number: marking the sequence of the electrical parameter and environmental parameter information of the sending data packet, marking the user contained in the data, and comparing the user contained in the data with the receiving party to complete the data and update the zone bit;
the third layer is a 16-bit serial number, and marks a data packet serial number which is continuously transmitted at a breakpoint or needs to be retransmitted;
the fourth layer is a sliding window layer, and the fourth layer is a 32-bit sliding window, and controls the sending and receiving of data according to the sending or receiving conversion.
And the fifth layer is a data cladding layer and transmits all the electrical parameter and environmental parameter data.
The format shown in fig. 4 is formed after the protocol header is added with the complementary full control field.
The mutual transmission completion of data transmission is realized by setting a mutual transmission completion control field of a connection-oriented transmission protocol based on data parameter information. The new protocol header, namely the transmission protocol based on the message packet and oriented to the connection, formed by adding some complementary full control fields in the protocol header, forms a reliable transmission mechanism and improves the data transmission efficiency.
In a reliable transmission mechanism, a transmission confirmation mechanism is adopted to confirm a transmission state, confirm the length of received data, ensure the reliability of data transmission and save transmission time, and a sender and a receiver start data transmission after confirming idle and successfully establishing contact under the mechanism, so that waiting time is saved and transmission efficiency is improved compared with a stop waiting mechanism; a data mutual transmission mechanism is adopted to reduce the probability of transmission failure caused by the occurrence of problems in the individual transmission process, further improve the reliability of data transmission, and avoid the loss of individual data by mutually transmitting data; by adopting a data complementing mechanism, the number of the sensors is saved, unnecessary data acquisition processes are reduced, the frequency of repeated transmission processes is reduced, the transmission efficiency and the transmission reliability are improved, the acquisition of repeated information is effectively reduced, the possibility of error reporting caused by data loss in the node transmission process is reduced, and the reliability of data is effectively improved.
A connection-oriented transmission protocol mutual transmission complementary full control field is added between an application layer and a transmission layer, a distributed photovoltaic data transmission protocol is established, and the safety, reliability and stability of the distributed photovoltaic data transmission protocol are guaranteed.
A distributed photovoltaic data mutual transmission and complementation complete transmission system is used for achieving a distributed photovoltaic data mutual transmission and complementation complete transmission method and comprises a main station layer, a communication layer and a terminal layer.
The overall architecture of the distributed photovoltaic data mutual-transmission complementary full-transmission system is divided into three layers from top to bottom, namely a master station layer, a communication layer and a terminal layer.
A main station layer: the system consists of an Internet of things cloud platform or an upper computer and has the functions of managing equipment, visualizing information and analyzing data.
And a communication layer: the system comprises a relay gateway, processes terminal data transmitted in a lora communication mode, sends the terminal data to an upper computer in a 4G communication mode, receives an instruction sent by the upper computer, and sends the terminal data to a terminal after analysis.
A terminal layer: the system is composed of terminal equipment, processes, stores and transmits data information of each node upwards, and executes a master station control instruction.
The terminal layer comprises a data acquisition module, a data processing module, a data storage module and a data transmission module.
A data acquisition module: and collecting the electrical data and meteorological data of the photovoltaic module.
A data processing module: and analyzing and processing the acquired data according to the set parameters.
A data storage module: and storing the processed data information.
A data transmission module: and transmitting the processed data to the relay gateway in a lora communication mode.
The method comprises the steps that firstly, an account is created for each terminal on a terminal layer, each terminal collects electrical data and partial meteorological data of a photovoltaic module through a data collection module, then the obtained data are analyzed and processed through a data processing module to obtain processed data, the processed data are stored through a data storage module, the transmission state is checked, user identity information is verified, channel stability is checked, transmission nodes are established, the processed data are mutually transmitted through the method, data integrity is checked, all data are stored in each node, a random number of nodes are selected, the data are transmitted to a relay gateway through a lora communication mode, and then the uploaded data collected by the gateway are transmitted to a monitoring master station cloud platform server through a 4G communication mode.
The work flow of the distributed photovoltaic data mutual transmission and complementary full transmission system comprises the following steps: (1) an account is created. (2) And collecting data. (3) And transmitting the data. (4) And completing the data. (5) And uploading the data.
Before data transmission, an account is created at each terminal device, device information position information is input, and the sensors acquire electrical parameter data and meteorological parameter data. Two nodes establish connection through two handshakes and one-time waving, a sending end and a receiving end are confirmed, respective control zone bits are changed and time is corrected, repeated information transmission is ignored after transmission is started, other information is supplemented, and each node has information of all nodes. And randomly selecting two nodes to send data information to the relay gateway. And after the data are received, the relay gateway uploads the two groups of received data to the cloud platform, and the cloud platform receives the check data to complete a complete transmission process.
The above embodiments only express specific embodiments of the present invention, and the description is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention.
Claims (8)
1. A distributed photovoltaic data mutual transmission complement full transmission method is characterized in that: the method comprises the following steps:
s1: establishing data transmission connection for two of the plurality of distributed photovoltaic nodes based on the mutual transmission complementary full control field;
s2: judging whether the data to be transmitted is received or not based on the mutual transmission complementary full control field, if not, transmitting the data between the two distributed photovoltaic nodes, and if so, ending the transmission;
s3: and each distributed photovoltaic node and other distributed photovoltaic nodes complete data transmission according to the steps S1-S2.
2. The distributed photovoltaic data complementary full transmission method according to claim 1, characterized in that:
after step S3, the following steps are performed:
s4: and randomly selecting part of distributed photovoltaic nodes to send data information to the relay gateway, and then uploading the data to the cloud platform by the relay gateway.
3. The distributed photovoltaic data complementary full transmission method according to claim 1, characterized in that:
the data transmission connection is established by shaking hands twice and waving hands once.
4. The distributed photovoltaic data complementary full transmission method according to claim 1, characterized in that:
the complementary full control field comprises a flag bit layer, a sequence number layer, a sliding window layer and a data cladding layer.
5. The method according to claim 4, wherein the method comprises the following steps:
the zone bit layer comprises a connection state zone bit, a transmission state zone bit, a breakpoint and retransmission zone bit, a sending time zone bit, a receiving confirmation zone bit, a time zone bit, a sending/receiving zone bit and a transmission wheel completion zone bit.
6. The distributed photovoltaic data complementary full transmission method according to claim 5, characterized in that:
the format of the mutual transmission complementary full control field is as follows:
the first layer is the flag bit layer, and the 32 bits of the first layer are:
a flag bit T0 of 1 bit of the first character represents a connection state, and when the T0 is 0, no connection exists; t0 is a connection state flag bit;
a flag bit T1 of a 1 bit of a second character and a flag bit T2 of a 1 bit of a third character represent transmission states, wherein the transmission is represented when T0 is 1 and T1 is 0, and the transmission is finished when T2 is 1; t1 and T2 are transmission status flag bits;
a flag bit T3 of the 1 bit of the fourth character represents a breakpoint continuous transmission state;
the fifth character and the sixth character are respectively 1-bit zone bits T4 and T5 which represent breakpoint positions, and when T3 is 1, the T4 and T5 record the breakpoint positions;
a flag bit T6 of a 1 bit of a seventh character represents a retransmission state, and data is retransmitted when T6 is 1;
T3-T6 are breakpoints and retransmission flag bits;
a flag bit T7 of 1 bit of the eighth character, which is used to indicate the number of times of sending the current data; t7 is a sending frequency zone bit;
the 1 bit zone bit T8 of the ninth character, T8 is 1, it means that the receiver is confirmed;
when the flag bit T9 of the 1 bit of the tenth character is 1, the T9 indicates that the transmission is finished but the confirmation of the receiver is not received; t8 and T9 are receiving confirmation flag bits;
the eleventh and twelfth characters are respectively 1-bit zone bits T10 and T11 which represent time marks; t10 and T11 are time flag bits;
a flag bit T12 of the 1 bit of the thirteenth character, wherein if the T12 is 1, the sending end is the receiving end, and if the T12 is 0, the receiving end is the receiving end; t12 is a transmitting/receiving zone bit;
the flag bit T13 of the 1 st bit of the fourteenth bit is 1, and the T13 is 1, which indicates that one round of data transmission is completed; t13 is a transmission wheel completion flag bit;
the rest bits are reserved bits and represent the user information of the received data at present;
the serial number layer comprises a second layer and a third layer;
the second layer is a 36-bit sequence number: marking the sequence of the electrical parameter and environmental parameter information of the sending data packet, marking the user contained in the data, and comparing the user contained in the data with the receiving party to complete the data and update the zone bit;
the third layer is a 16-bit serial number, and marks the serial number of the data packet which is continuously transmitted at the breakpoint or needs to be retransmitted;
the fourth layer is a sliding window layer, is a 32-bit sliding window, and controls the sending and receiving of data according to the sending or receiving conversion;
and the fifth layer is a data cladding and transmits all the electrical parameter and environmental parameter data.
7. A distributed photovoltaic data complementary complete transmission system, for implementing a distributed photovoltaic data complementary complete transmission method according to any one of claims 1 to 6, characterized in that: the system comprises a master station layer, a communication layer and a terminal layer.
8. The distributed photovoltaic data complementary full transmission system according to claim 1, wherein:
the terminal layer comprises a data acquisition module, a data processing module, a data storage module and a data transmission module.
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