A method and system for lossless forwarding of relay protection information

Abstract

The present invention discloses a method and system for lossless forwarding of relay protection information, belonging to the technical field of substation data transmission management. The system includes an information transmission control module, a check and error correction module, an acquisition and monitoring module, an intelligent analysis module, an intelligent computing module, an intelligent control module, and an interaction module; the information transmission control module is used to send data packets; the check and error correction module is used to receive data packets and correct error symbols; the acquisition and monitoring module is used to collect parameter data; the intelligent analysis module is used to establish an information transmission quality analysis model based on historical data stored in a database; the intelligent computing module is used to calculate the number of check symbols added to the next data packet and the number of information symbols in the data block after FEC encoding; the intelligent control module is used to automatically adjust the FEC encoding of the next data packet in the substation; and the interaction module is used to provide a human-computer interaction platform.

Description

Technical Field

[0001] The present invention relates to the technical field of substation data transmission management, and in particular to a method and system for lossless forwarding of relay protection information. Background Art

[0002] During the construction of smart substations, real-time and accurate information transmission is crucial for rapid response and handling of substation faults. However, traditional relay protection information transmission methods have the risk of information loss or damage, which seriously affects the accurate judgment and timely handling of faults. Therefore, lossless forwarding technology for relay protection information has emerged. Lossless forwarding usually refers to the use of high-quality transmission media, advanced coding technology and precise synchronization mechanisms during data transmission to ensure the losslessness of signals during transmission and the integrity and accuracy of original information.

[0003] During the process of lossless information forwarding, redundant encoding is performed at the data sending end through FEC coding, check symbols are added, additional redundant information is generated, and this redundant information is sent to the receiving end together with the original information. After receiving the data, the receiving end uses this redundant information to detect and correct errors, thereby achieving lossless information forwarding. However, in the existing technology, due to signal interference caused by the failure of the Baoxin substation, it is difficult to adaptively adjust the FEC coding according to the error characteristics. The Baoxin substation cannot quickly and efficiently send the faulty data packet to the Baoxin main station, which increases the risk of safety accidents. Summary of the Invention

[0004] The object of the present invention is to provide a method and system for lossless forwarding of relay protection information to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solution: a method for lossless forwarding of relay protection information, the method comprising the following steps:

[0006] S10. When a device failure occurs at the Baoxin substation, the relay protection information transmitted from the Baoxin substation to the Baoxin master station is encapsulated using encapsulation technology to obtain the data packet to be transmitted. The data packet is divided into data blocks, and check symbols are added to the data blocks through FEC encoding. The data blocks are then sent to the Baoxin master station. Parameter data during the data packet transmission process between the Baoxin substation and the Baoxin master station is collected; the parameter data includes the number of information symbols in the data block after FEC encoding, the number of check symbols added, and the data packet transmission rate.

[0007] S20, the security master station decapsulates the received data packet and performs FEC decoding, detects and corrects the error bits in the data block symbols based on the redundant information in the check symbols, and determines the number of corrected error symbols;

[0008] S30, storing the collected parameter data and the determined number of corrected error symbols as historical data in a database, and establishing an information transmission quality analysis model based on the historical data stored in the database, and fitting a relationship curve of the influence of the total number of symbols transmitted per unit time of the FEC-encoded data block on the information transmission quality during the data block transmission process;

[0009] S40. Monitor the network performance of the Baoxin substation and the Baoxin main station to determine the current data packet transmission rate; the Baoxin main station sends the optimal transmission interval of the next data packet to the Baoxin substation based on the current received data packet processing rate; calculate the number of check symbols added to the next data packet and the number of information symbols in the FEC-encoded data block based on the established information transmission quality analysis model, the minimum information transmission quality threshold, the optimal transmission interval of the next data packet, the size of the next data packet, and the current data packet transmission rate;

[0010] S50. Automatically adjust the FEC encoding of the next data packet of the Baoxin substation based on the calculated number of check symbols added to the next data packet and the number of information symbols in the data block after FEC encoding, and repeat steps S10-S50 until the administrator controls the Baoxin substation to stop sending data packets.

[0011] A relay protection information lossless forwarding system, the system includes an information transmission control module, a check and error correction module, a collection and monitoring module, an intelligent analysis module, an intelligent calculation module, an intelligent control module and an interaction module;

[0012] The information transmission control module is used to encapsulate the relay protection information transmitted from the Baoxin substation to the Baoxin main station using encapsulation technology when a device failure occurs at the Baoxin substation, obtain the data packet required for transmission, divide the data packet into data blocks, add check symbols to the data blocks through FEC encoding, and send them to the Baoxin main station;

[0013] The check and error correction module is used to unpack the received data packets at the main station and perform FEC decoding, detect and correct the error bits in the data block symbols based on the redundant information in the check symbols, and determine the number of corrected error symbols;

[0014] The acquisition and monitoring module is used to collect parameter data during the data packet transmission process between the Baoxin substation and the Baoxin main station; the parameter data includes the number of information symbols in the data block after FEC encoding, the number of added check symbols and the data packet transmission rate;

[0015] The intelligent analysis module is used to store the collected parameter data and the number of error symbols corrected as historical data in a database, and to establish an information transmission quality analysis model based on the historical data stored in the database, and to fit a curve showing the relationship between the total number of symbols transmitted per unit time of a data block after FEC encoding and the information transmission quality during data block transmission;

[0016] The intelligent computing module is used to monitor the network performance of the Baoxin substation and the Baoxin main station and determine the current data packet transmission rate; the Baoxin main station sends the optimal sending interval of the next data packet to the Baoxin substation based on the current received data packet processing rate; and calculates the number of check symbols added to the next data packet and the number of information symbols in the FEC-encoded data block based on the established information transmission quality analysis model, the minimum threshold of information transmission quality, the optimal sending interval of the next data packet, the size of the next data packet and the current data packet transmission rate;

[0017] The intelligent control module is used to automatically adjust the FEC coding of the next data packet of the trustworthy substation according to the calculated number of check symbols added to the next data packet and the number of information symbols of the data block after FEC coding;

[0018] The interactive module is used to provide a human-computer interaction platform. When the administrator sends a control instruction through the human-computer interaction platform, the Baoxin substation stops sending data packets. The human-computer interaction platform is used by the administrator to control the Baoxin substation to stop sending data packets.

[0019] Compared with the existing technology, the beneficial effects achieved by the present invention are: by establishing an information transmission quality analysis model, analyzing the impact of FEC coding on data packet communication transmission, and predicting the transmission time required for the next data packet based on current conditions, the number of added check symbols and the number of information symbols in the data block after FEC coding are adaptively adjusted, thereby improving the stability of the FEC coding technology, and at the same time dividing the priority of the data packet, so that the faulty data packet can be forwarded more quickly and efficiently without loss, so that the system can process the fault information more quickly, and reduce the risk of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the steps of a method for lossless forwarding of relay protection information according to the present invention;

[0021] Figure 2 It is a structural diagram of a lossless forwarding system for relay protection information of the present invention. DETAILED DESCRIPTION

[0022] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] See also Figure 1-2 , the present invention provides a technical solution:

[0024] See also Figure 1 In the first embodiment, a method for lossless forwarding of relay protection information is provided, the method comprising the following steps:

[0025] S10. When a device failure occurs at the Baoxin substation, encapsulation technology is used to encapsulate the relay protection information transmitted from the Baoxin substation to the Baoxin main station to obtain the data packet required for transmission, which is divided into data blocks. Check symbols are added to the data blocks through FEC encoding, and the data blocks are sent to the Baoxin main station; wherein, parameter data is collected during the data packet transmission process between the Baoxin substation and the Baoxin main station; the parameter data includes the number of information symbols in the data block after FEC encoding, the number of added check symbols, and the data packet transmission rate.

[0026] Furthermore, the data packets are divided into primary data packets, secondary data packets and fault data packets; the primary data packets represent important relay protection information; the secondary data packets represent unimportant relay protection information; the fault data packets represent the relay protection information of the faulty equipment at the corresponding Baoxin substation; when an equipment failure occurs at the Baoxin substation, the faulty equipment is determined, and the primary data packets and secondary data packets corresponding to the equipment are used as fault data packets and are transmitted first; wherein, when the primary data packets and secondary data packets are transmitted, the primary data packets are transmitted first.

[0027] In this embodiment, the important relay protection information represents information that is crucial to the safe and stable operation of the power system of the Baoxin substation, including but not limited to the configuration and setting of the protection device, the equipment operating status and the protection action; the unimportant relay protection information represents information that has little impact on the safe and stable operation of the power system of the Baoxin substation, including but not limited to the system operation log and the equipment operating status analog quantity; the equipment of the Baoxin substation includes but is not limited to switches, optoelectronic converters and network storage; wherein, in the process of dividing the data packet into data blocks, the data blocks of the same data packet have the same size, that is, the number of information symbols in the data block after FEC encoding is the same.

[0028] S20. The security master station decapsulates the received data packet and performs FEC decoding, detects and corrects error bits in the data block symbols based on redundant information in the check symbols, and determines the number of corrected error symbols.

[0029] Furthermore, when the Baoxin substation sends a data packet, it determines the number of information symbols X and the number of check symbols Y added to the data block after FEC encoding;

[0030] When the Baoxin main station performs FEC decoding on the received data packet, it detects and corrects the erroneous bits in the data block symbols based on the redundant information in the check symbol, and determines the number of corrected erroneous symbols Z; where the erroneous symbol indicates the symbol with erroneous bits during the data packet transmission process; when the Baoxin main station cannot correct the erroneous symbol in the data block, it sends a signal to the Baoxin substation to retransmit the data block.

[0031] It should be noted that the inability of the security main station to correct the erroneous symbols in the data block means that it is impossible to correct all the erroneous bits in all the erroneous symbols in the data block based on the currently added check symbols; since the receiving end of the security main station cannot correct the erroneous symbols of the received data block, that is, the transmission fails, the data block is retransmitted.

[0032] In this implementation, due to the design of the encoding rules, the number of information symbols corresponding to the data block size is usually fixed. By calculating in advance the number of information symbols of the data block to be divided into the next data packet before encoding and the number of check symbols to be added, a suitable encoding rule is selected, so that the faulty data packet can be forwarded losslessly more quickly and efficiently; redundant information is added to the data block through FEC encoding, and the main station of the security system detects and corrects the erroneous symbols that occur during the transmission process through this added redundant information, thereby realizing lossless conversion of data packets and improving the reliability of the communication system.

[0033] It should be noted that at the sending end of the Baoxin substation, data packet encapsulation is completed before the data packet is transmitted, and FEC encoding is performed after the data packet encapsulation; at the receiving end of the Baoxin main station, FEC decoding is performed after the data packet is unpacked. These two processes occur sequentially, but they are independent of each other, so FEC decoding will not affect the message encapsulation process at the sending end; through FEC encoding, even if data packet loss or bit errors occur during transmission, the data packet can be restored at the receiving end of the Baoxin main station without the need to re-obtain the lost data packet from the sending end of the Baoxin substation, thereby realizing lossless forwarding of relay protection information.

[0034] S30. The collected parameter data and the number of corrected error symbols are stored as historical data in a database. Based on the historical data stored in the database, an information transmission quality analysis model is established to fit a relationship curve of the influence of the total number of symbols transmitted per unit time of the data block after FEC encoding on the information transmission quality during the data block transmission process.

[0035] Specifically, the method steps are:

[0036] S301, analyze the historical data stored in the database to determine the set P consisting of different data packet transmission rates, information symbol numbers, check symbol numbers and error symbol numbers; where P = {P1, P2, ..., P n};P i =(V i ,X i ,Y i ,Z i );

[0037] Among them, P1, P2, ..., P n represents the data packet transmission rate, number of information symbols, number of check symbols and number of error symbols in the different historical data analyzed; P i represents the data packet transmission rate, number of information symbols, number of check symbols, and number of error symbols in the i-th historical data analyzed; i = 1, 2, ..., n; n represents the amount of historical data analyzed; V i represents the data packet transmission rate in the i-th historical data analyzed; X i represents the number of information symbols in the i-th historical data analyzed; Y i represents the number of check symbols in the i-th historical data analyzed; Z i represents the number of error symbols in the i-th historical data analyzed;

[0038] S302, establish an information transmission quality analysis model, and calculate the total number of symbols transmitted per unit time of the FEC-encoded data block. As an independent variable, the information transmission quality during data block transmission As the dependent variable, the relationship curve of the total number of symbols transmitted per unit time of the data block after FEC encoding and the impact of the information transmission quality during the data block transmission process is fitted:

[0039]

[0040] Among them, k1 and k2 are constants; 0 <k1≤1;

[0041] S303 , substitute different numbers of information symbols, check symbols, and error symbols corresponding to different data packet transmission rates into the relationship curve of step S302 , train the information transmission quality analysis model, and determine the values ​​of k1 and k2 .

[0042] It should be noted that k1 and k2 are variable factors that fit the total number of symbols in the data block after FEC coding on the information transmission quality during data block transmission; according to X, Y and V, the total number of symbols transmitted per unit time of the data block after FEC coding is determined. Determine the information transmission quality during data block transmission based on X and Z The larger the value, the more error symbols appear under the unit information symbol number, that is, the worse the information transmission quality is during data block transmission. By using the corresponding data packet transmission rate, number of information symbols, number of check symbols and number of error symbols in different historical data in the set P, V i As the V training parameter in the relationship curve; X i As the X training parameter in the relationship curve; Y i As the Y training parameter in the relationship curve; Z i Considered as the Z training parameter in the relationship curve; the training parameters are divided into a training set and a validation set, and the training set is substituted into the relationship curve to obtain: Different fitting curves are determined according to the values ​​of k1 and k2. According to the least squares method, an optimal curve is found so that the sum of the vertical distances from the optimal curve to the points on the independent variables and dependent variables corresponding to these training parameters is minimized, so that the information transmission quality analysis model can predict the information transmission quality during the data block transmission process. The model performance is verified according to the validation set, and the values ​​of k1 and k2 are adjusted to improve the accuracy of the information transmission quality analysis model prediction, and finally the values ​​of k1 and k2 are determined.

[0043] S40. Monitor the network performance of the Baoxin substation and the Baoxin main station to determine the current data packet transmission rate; the Baoxin main station sends the optimal sending interval duration of the next data packet to the Baoxin substation based on the currently received data packet processing rate; calculate the number of check symbols added to the next data packet and the number of information symbols in the data block after FEC encoding based on the established information transmission quality analysis model, the minimum threshold of information transmission quality, the optimal sending interval duration of the next data packet, the size of the next data packet and the current data packet transmission rate.

[0044] In this embodiment, after receiving the data packet, the Baoxin main station diagnoses the Baoxin substation fault based on the fault data in the data packet, exports the fault data recorded in the data packet, and predicts the fault data export time of the currently received data packet based on the current received data packet processing rate, that is, the fault data export rate, and sends it to the Baoxin substation as the optimal sending interval duration of the next data packet; wherein the fault data includes but is not limited to equipment current and voltage.

[0045] Specifically, the method steps for calculating the number of check symbols added to the next data packet are:

[0046] S401, monitor the network performance of the Baoxin sub-station and the Baoxin main station, and determine the data packet transmission rate V at the current time t t , and determine the size W of the next data packet at the current time t t ; Where t represents the timestamp;

[0047] S402, the Baoxin substation receives information sent by the Baoxin master station and obtains the optimal sending interval time T0 for the next data packet;

[0048] S403, calculate the number of check symbols Y added to the next data packet based on the established information transmission quality analysis model, the minimum threshold of information transmission quality, the optimal sending interval of the next data packet, the size of the next data packet and the current data packet transmission rate next and the number of information symbols X in the data block after FEC encoding next , so that Y next and X next The formula to meet the conditions is:

[0049]

[0050] Among them, T sum Indicates the predicted transmission time of the next data packet; Indicates the size of each information symbol under the selected encoding rule; Indicates the size of each check symbol under the selected encoding rule; ΔT indicates the duration of the data block transmission interval; Indicates that the number of information symbols is X next The minimum threshold of information transmission quality corresponding to ; T' represents the time interval with the shortest distance between the optimal sending interval and the next data packet.

[0051] In this implementation, The size of is determined by the selected FEC coding rule, which indicates the ratio of the maximum number of error symbols that can be corrected to the number of information symbols in the data block under the current FEC coding rule. For example, under the RS coding rule, in, Express Round down to the nearest integer.

[0052] It should be noted that W t 、 and The size unit is bit; V t The size unit is bit / s; through X next Select the appropriate encoding rule for the size and get the corresponding and Predict the transmission time required for the next data packet, and then use min|T sum -T0|Limit the calculation results and determine the final encoding rules.

[0053] S50. Automatically adjust the FEC encoding of the next data packet of the Baoxin substation based on the calculated number of check symbols added to the next data packet and the number of information symbols in the data block after FEC encoding, and repeat steps S10-S50 until the administrator controls the Baoxin substation to stop sending data packets.

[0054] Furthermore, a human-computer interaction platform is provided. When the administrator sends a control instruction through the human-computer interaction platform, the Baoxin substation stops sending data packets; the human-computer interaction platform is used by the administrator to control the Baoxin substation to stop sending data packets.

[0055] In this embodiment, the selected FEC encoding rules include but are not limited to RS encoding and A-FEC encoding; according to the calculated Y next and X next The process of automatically adjusting the FEC coding of the next data packet of the Baoxin substation is as follows: at a certain moment, the Baoxin substation uses A-FEC coding to transmit the data packet. At this time, the signal interference caused by the failure of the Baoxin substation leads to poor network communication conditions. Under the A-FEC coding rules, it is difficult to meet The RS coding has a stronger error correction capability than the A-FEC coding. Therefore, the trust substation selects the RS coding rule for the next data packet, and the calculated X next =239, Y next =16, the calculated T' reaches the minimum value, that is, the next data packet is transmitted using RS(255,239) encoding; the number of information symbols in the encoded data block is 239, that is, the size of each data block divided into the data packet is 239 symbols, and 255 indicates that it contains 239 information symbols and 16 check symbols.

[0056] See also Figure 2, in this embodiment 2: a relay protection information lossless forwarding system is provided, the system includes an information transmission control module, a check and error correction module, a collection and monitoring module, an intelligent analysis module, an intelligent calculation module, an intelligent control module and an interaction module;

[0057] The information transmission control module is used to encapsulate the relay protection information transmitted from the Baoxin substation to the Baoxin main station using encapsulation technology when a device failure occurs at the Baoxin substation, obtain the data packet required for transmission, divide the data packet into data blocks, add check symbols to the data blocks through FEC encoding, and send them to the Baoxin main station;

[0058] The check and error correction module is used to unpack the received data packets at the main station and perform FEC decoding, detect and correct the error bits in the data block symbols based on the redundant information in the check symbols, and determine the number of corrected error symbols;

[0059] The acquisition and monitoring module is used to collect parameter data during the data packet transmission process between the Baoxin substation and the Baoxin main station; the parameter data includes the number of information symbols in the data block after FEC encoding, the number of added check symbols and the data packet transmission rate;

[0060] The intelligent analysis module is used to store the collected parameter data and the number of error symbols corrected as historical data in a database, and to establish an information transmission quality analysis model based on the historical data stored in the database, and to fit a curve showing the relationship between the total number of symbols transmitted per unit time of a data block after FEC encoding and the information transmission quality during data block transmission;

[0061] The intelligent computing module is used to monitor the network performance of the Baoxin substation and the Baoxin main station and determine the current data packet transmission rate; the Baoxin main station sends the optimal sending interval of the next data packet to the Baoxin substation based on the current received data packet processing rate; and calculates the number of check symbols added to the next data packet and the number of information symbols in the FEC-encoded data block based on the established information transmission quality analysis model, the minimum threshold of information transmission quality, the optimal sending interval of the next data packet, the size of the next data packet and the current data packet transmission rate;

[0062] The intelligent control module is used to automatically adjust the FEC coding of the next data packet of the trustworthy substation according to the calculated number of check symbols added to the next data packet and the number of information symbols of the data block after FEC coding;

[0063] The interactive module is used to provide a human-computer interaction platform. When the administrator sends a control instruction through the human-computer interaction platform, the Baoxin substation stops sending data packets. The human-computer interaction platform is used by the administrator to control the Baoxin substation to stop sending data packets.

[0064] In this embodiment:

[0065] The data packet is encapsulated and FEC-encoded by the information transmission control module and then sent to the check and error correction module; the check and error correction module decapsulates and FEC-decodes the received data packet and corrects the error symbols; the acquisition monitoring module collects parameter data during the data packet transmission process between the Baoxin substation and the Baoxin main station, and sends the collected parameter data to the intelligent analysis module and the intelligent calculation module respectively; the intelligent analysis module fits the relationship curve of the total number of symbols of the data block after FEC encoding on the information transmission quality during the data block transmission process, and sends the fitting result to the intelligent calculation module; the intelligent calculation module calculates the number of check symbols added to the next data packet and the number of information symbols of the data block after FEC encoding, and sends the calculation result to the intelligent control module; the intelligent control module automatically adjusts the FEC coding of the next data packet of the Baoxin substation according to the calculated number of check symbols added to the next data packet and the number of information symbols of the data block after FEC encoding; among them, when the management personnel sends a control instruction through the human-computer interaction platform, the interaction module sends an instruction to the information transmission control module to stop sending data packets.

[0066] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for lossless forwarding of relay protection information, characterized by: The method comprises the following steps: S10. When a device failure occurs at the Baoxin substation, the relay protection information transmitted from the Baoxin substation to the Baoxin master station is encapsulated using encapsulation technology to obtain the data packet to be transmitted. The data packet is divided into data blocks, and check symbols are added to the data blocks through FEC encoding. The data blocks are then sent to the Baoxin master station. Parameter data during the data packet transmission process between the Baoxin substation and the Baoxin master station is collected; the parameter data includes the number of information symbols in the data block after FEC encoding, the number of check symbols added, and the data packet transmission rate. S20, the security master station decapsulates the received data packet and performs FEC decoding, detects and corrects the error bits in the data block symbols based on the redundant information in the check symbols, and determines the number of corrected error symbols; S30, storing the collected parameter data and the determined number of corrected error symbols as historical data in a database, and establishing an information transmission quality analysis model based on the historical data stored in the database, and fitting a relationship curve of the influence of the total number of symbols transmitted per unit time of the FEC-encoded data block on the information transmission quality during the data block transmission process; S40. Monitor the network performance of the Baoxin substation and the Baoxin main station to determine the current data packet transmission rate; the Baoxin main station sends the optimal transmission interval of the next data packet to the Baoxin substation based on the current received data packet processing rate; calculate the number of check symbols added to the next data packet and the number of information symbols in the FEC-encoded data block based on the established information transmission quality analysis model, the minimum information transmission quality threshold, the optimal transmission interval of the next data packet, the size of the next data packet, and the current data packet transmission rate; S50. Automatically adjust the FEC encoding of the next data packet of the Baoxin substation based on the calculated number of check symbols added to the next data packet and the number of information symbols in the data block after FEC encoding, and repeat steps S10-S50 until the administrator controls the Baoxin substation to stop sending data packets.

2. The method for lossless forwarding of relay protection information according to claim 1, characterized in that: The data packets are divided into a primary data packet, a secondary data packet and a fault data packet; the primary data packet represents important relay protection information; The secondary data packet represents unimportant relay protection information; the fault data packet represents the relay protection information of the faulty equipment in the corresponding security substation; When a device failure occurs in the Baoxin substation, the failed device is determined, and the first-level data packet and second-level data packet corresponding to the device are treated as fault data packets and transmitted first. Among them, when transmitting the first-level data packet and the second-level data packet, the first-level data packet is transmitted first.

3. The method for lossless forwarding of relay protection information according to claim 1, characterized in that: When the Baoxin substation sends a data packet, it determines the number of information symbols X and the number of check symbols Y added to the data block after FEC encoding; When the Baoxin main station performs FEC decoding on the received data packet, it detects and corrects the erroneous bits in the data block symbols based on the redundant information in the check symbol, and determines the number of corrected erroneous symbols Z; where the erroneous symbol indicates the symbol with erroneous bits during the data packet transmission process; when the Baoxin main station cannot correct the erroneous symbol in the data block, it sends a signal to the Baoxin substation to retransmit the data block.

4. The method for lossless forwarding of relay protection information according to claim 3, characterized in that: The method steps of step S30 are: S301, analyze the historical data stored in the database to determine the set P consisting of different data packet transmission rates, information symbol numbers, check symbol numbers and error symbol numbers; where P = {P1, P2, ..., P n };P i =(V i ,X i ,Y i ,Z i ); Among them, P1, P2, ..., P n represents the data packet transmission rate, number of information symbols, number of check symbols and number of error symbols in the different historical data analyzed; P i represents the data packet transmission rate, number of information symbols, number of check symbols, and number of error symbols in the i-th historical data analyzed; i = 1, 2, ..., n; n represents the amount of historical data analyzed; V i represents the data packet transmission rate in the i-th historical data analyzed; X i represents the number of information symbols in the i-th historical data analyzed; Y i represents the number of check symbols in the i-th historical data analyzed; Z i represents the number of error symbols in the i-th historical data analyzed; S302, establish an information transmission quality analysis model, and calculate the total number of symbols transmitted per unit time of the FEC-encoded data block. As an independent variable, the information transmission quality during data block transmission As the dependent variable, the relationship curve of the total number of symbols transmitted per unit time of the data block after FEC encoding and the impact of the information transmission quality during the data block transmission process is fitted: Among them, k1 and k2 are constants; 0 <k1≤1; S303 , substitute different numbers of information symbols, check symbols, and error symbols corresponding to different data packet transmission rates into the relationship curve of step S302 , train the information transmission quality analysis model, and determine the values ​​of k1 and k2 .

5. The method for lossless forwarding of relay protection information according to claim 4, characterized in that: The method steps for calculating the number of check symbols added to the next data packet in step S40 are: S401, monitor the network performance of the Baoxin sub-station and the Baoxin main station, and determine the data packet transmission rate V at the current time t t , and determine the size W of the next data packet at the current time t t ; Where t represents the timestamp; S402, the Baoxin substation receives information sent by the Baoxin master station and obtains the optimal sending interval time T0 for the next data packet; S403, calculate the number of check symbols Y added to the next data packet based on the established information transmission quality analysis model, the minimum threshold of information transmission quality, the optimal sending interval of the next data packet, the size of the next data packet and the current data packet transmission rate next and the number of information symbols X in the data block after FEC encoding next , so that Y next and X next The formula to meet the conditions is: Among them, T sum Indicates the predicted transmission time of the next data packet; Indicates the size of each information symbol under the selected encoding rule; Indicates the size of each check symbol under the selected encoding rule; ΔT indicates the duration of the data block transmission interval; Indicates that the number of information symbols is X next The minimum threshold of information transmission quality corresponding to ; T' represents the time interval with the shortest distance between the optimal sending interval and the next data packet.

6. The method for lossless forwarding of relay protection information according to claim 5, characterized in that: A human-computer interaction platform is provided. When the administrator sends a control instruction through the human-computer interaction platform, the Baoxin substation stops sending data packets; the human-computer interaction platform is used by the administrator to control the Baoxin substation to stop sending data packets.

7. A lossless relay protection information forwarding system, characterized by: The system includes an information transmission control module, a check and error correction module, a collection and monitoring module, an intelligent analysis module, an intelligent calculation module, an intelligent control module and an interaction module; The information transmission control module is used to encapsulate the relay protection information transmitted from the Baoxin substation to the Baoxin main station using encapsulation technology when a device failure occurs at the Baoxin substation, obtain the data packet required for transmission, divide the data packet into data blocks, add check symbols to the data blocks through FEC encoding, and send them to the Baoxin main station; The check and error correction module is used to unpack the received data packets at the main station and perform FEC decoding, detect and correct the error bits in the data block symbols based on the redundant information in the check symbols, and determine the number of corrected error symbols; The acquisition and monitoring module is used to collect parameter data during the data packet transmission process between the Baoxin substation and the Baoxin main station; The parameter data includes the number of information symbols of the data block after FEC encoding, the number of added check symbols and the data packet transmission rate; The intelligent analysis module is used to store the collected parameter data and the number of error symbols corrected as historical data in a database, and to establish an information transmission quality analysis model based on the historical data stored in the database, and to fit a curve showing the relationship between the total number of symbols transmitted per unit time of a data block after FEC encoding and the information transmission quality during data block transmission; The intelligent computing module is used to monitor the network performance of the Baoxin substation and the Baoxin main station and determine the current data packet transmission rate; the Baoxin main station sends the optimal sending interval of the next data packet to the Baoxin substation based on the current received data packet processing rate; Calculate the number of check symbols added to the next data packet and the number of information symbols in the FEC-encoded data block based on the established information transmission quality analysis model, the minimum information transmission quality threshold, the optimal interval for sending the next data packet, the size of the next data packet, and the current data packet transmission rate; The intelligent control module is used to automatically adjust the FEC coding of the next data packet of the trustworthy substation according to the calculated number of check symbols added to the next data packet and the number of information symbols of the data block after FEC coding; The interactive module is used to provide a human-computer interaction platform. When the administrator sends a control instruction through the human-computer interaction platform, the Baoxin substation stops sending data packets. The human-computer interaction platform is used by the administrator to control the Baoxin substation to stop sending data packets.

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