Communication method, device, program, storage medium, electronic device, and system

Abstract

The present application relates to the technical field of wide-area measurement and control of electrified railway traction power supply system, and particularly relates to a communication method, device, program, storage medium, electronic equipment and system. In order to solve the problem that the existing communication method has high network delay and cannot meet the requirements of wide-area protection measurement and control, the present application provides a communication method based on 5G communication and used for master station protection device, comprising the following steps: receiving the telemetry information sent by each branch station protection device through the communication information group established in the process layer network taking power supply arm as a unit; calculating the channel delay when receiving the telemetry information sent by each branch station protection device; finding the telemetry information of each branch station protection device corresponding to the time according to the channel delay, performing synchronous calculation, so as to provide the master station protection device with decision-making and execute the related logical judgment of power supply arm protection, fault ranging and self-healing reconstruction; sending the execution instruction to the corresponding branch station protection device through the communication information group.

Description

Technical Field

[0001] This invention relates to the technical field of wide-area measurement and control of traction power supply systems for electrified railways, specifically to communication methods, devices, programs, storage media, electronic devices, and systems. Background Technology

[0002] my country's high-speed electrified railway traction power supply systems are gradually adopting wide-area protection and control systems. In addition to the functions of traditional substation automation systems, these systems also possess station-level protection and control functions based on information from the entire substation, as well as wide-area protection and control functions based on power supply arms. These mainly include circuit breaker failure protection, busbar fast protection, power supply arm protection, switch layered interlocking, and traction power supply system self-healing reconfiguration. The application of wide-area protection and control systems improves the reliability, speed, sensitivity, and selectivity of traction power supply relay protection, accelerates fault location, faulty component isolation, and power restoration after a fault, and significantly enhances the reliability of the traction power supply system.

[0003] Wide-area protection and control functions such as power supply arm protection and reconfiguration self-healing rely on inter-department wide-area networks, which have high requirements for network latency, generally requiring a latency of less than 10ms. Currently, wide-area networks typically use direct fiber optic connections or communication transmission networks, resulting in high network latency, which cannot meet the requirements of wide-area protection and control.

[0004] Accordingly, there is a need in this field for a communication method with low network latency that can meet the requirements of wide-area protection and control. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned problems in the prior art, namely, that the existing communication methods have high network latency and cannot meet the requirements of wide-area protection and control.

[0006] In a first aspect, the present invention provides a communication method, the communication method being based on 5G communication and used in a main protection device, comprising the following steps:

[0007] Telemetry information from the protection devices of each substation is received through a communication information group established in the process layer network with the power supply arm as the unit.

[0008] Calculate the channel delay at the moment of receiving telemetry information from the protection devices of each branch station;

[0009] Based on the channel delay, the telemetry information of each substation protection device at the corresponding time is retrieved and synchronously calculated so that the main substation protection device can make decisions and execute the relevant logical judgments for power supply arm protection, fault location and self-healing reconfiguration.

[0010] The execution command is sent to the corresponding substation protection device through the communication information group.

[0011] Preferably, the calculation of the channel delay at the time of receiving telemetry information from each branch protection device includes:

[0012] The channel delay is calculated using the following formula:

[0013] Td=(t2-t1-△t) / 2

[0014] Where: t1 is the time when the main protection device sends the channel delay command to the branch protection device; t2 is the time when the main protection device receives the channel delay feedback command from the branch protection device; Δt is the fixed delay; Td is the channel delay.

[0015] Preferably, the step of searching for the telemetry information of each substation protection device at the corresponding time based on the channel delay and performing synchronous calculation includes:

[0016] After receiving data from the branch protection device at time t2, the main protection device performs calculations using the data from time t2-Td.

[0017] Preferably, the step of searching for the telemetry information of each substation protection device at the corresponding time based on the channel delay and performing synchronous calculation includes:

[0018] After receiving data from the branch protection device at time t2, the main protection device searches for the corresponding data at that time, before that time, and after that time, and uses the following formula to fit the data of the main protection device at time t2-Td:

[0019]

[0020] Where y represents the fitted data at time t2-Td, x0 represents the adjacent time before t2-Td, x1 represents the adjacent time after t2-Td, x2 represents the second adjacent time after t2-Td, y0 represents the data at time x0, y1 represents the data at time x1, and y2 represents the data at time x2.

[0021] Preferably, the communication information group transmits GOOSE messages based on the IEC61850 standard.

[0022] Preferably, each branch protection device has a unique APPID address and GOSSE group. Protection devices that form the communication information group communicate with each other, and communication is blocked for protection and control devices that do not form the communication information group.

[0023] Secondly, the present invention provides a communication method, which is based on 5G communication and used in a branch protection device, comprising the following steps:

[0024] Telemetry information sent to the main substation protection device through a communication information group established in the process layer network with the power supply arm as the unit, so that the main substation protection device can make decisions and execute relevant logical judgments for power supply arm protection, fault location and self-healing reconfiguration after synchronous calculation;

[0025] The execution command sent by the main protection device is received through the communication information group.

[0026] Preferably, the communication information group transmits GOOSE messages based on the IEC61850 standard.

[0027] Preferably, each branch protection device has a unique APPID address and GOSSE group. Protection devices that form the communication information group communicate with each other, and communication is blocked for protection and control devices that do not form the communication information group.

[0028] Thirdly, the present invention provides a communication method, which is based on 5G communication and used in a 5G communication switch, comprising the following steps:

[0029] Establish a communication information group in the process layer network with the power supply arm as the unit;

[0030] The communication information group receives telemetry information sent by each substation protection device and sends the telemetry information to the main substation protection device so that the main substation protection device can make decisions and execute relevant logical judgments for power supply arm protection, fault location and self-healing reconfiguration after synchronous calculation.

[0031] The system receives control commands sent by the main protection device through the communication information group and sends the control commands to the corresponding branch protection device.

[0032] Fourthly, the present invention provides a communication device, the communication device being based on 5G communication technology and used in a main protection device, comprising:

[0033] Telemetry information receiving unit; used to receive telemetry information sent by the protection devices of each substation through the communication information group established in the process layer network with the power supply arm as the unit;

[0034] The channel delay calculation unit is used to calculate the channel delay at the moment of receiving telemetry information sent by the protection devices of each branch station;

[0035] The synchronous calculation unit is used to find the telemetry information of each substation protection device at the corresponding time according to the channel delay, and perform synchronous calculations so that the main substation protection device can make decisions and execute the relevant logical judgments of power supply arm protection, fault location and self-healing reconfiguration.

[0036] The instruction sending unit is used to send an execution instruction to the corresponding substation protection device through the communication information group.

[0037] Fifthly, the present invention provides a communication device, the communication device being based on 5G communication technology and used in a branch office protection device, comprising:

[0038] The telemetry information sending unit sends telemetry information to the main protection device through the communication information group established in the process layer network with the power supply arm as the unit, so that the main protection device can make decisions and execute the relevant logical judgments of power supply arm protection, fault location and self-healing reconfiguration after synchronous calculation.

[0039] The instruction receiving unit is used to receive the execution instruction sent by the main protection device through the communication information group.

[0040] Sixthly, the present invention provides a communication device, the communication device being based on 5G communication technology and used in a 5G communication switch, comprising:

[0041] A communication unit is used to establish communication information groups in a process layer network based on power supply arms.

[0042] The telemetry information receiving and sending unit is used to receive telemetry information sent by each substation protection device through the communication information group, and send the telemetry information to the main substation protection device so that the main substation protection device can make decisions and execute relevant logical judgments for power supply arm protection, fault location and self-healing reconfiguration after synchronous calculation.

[0043] The instruction receiving and sending unit is used to receive control instructions sent by the main protection device through the communication information group, and send the control instructions to the corresponding branch protection device.

[0044] In a seventh aspect, the present invention provides a computer program that, when executed by a processor, implements the method described in any one of the first to third aspects.

[0045] Eighthly, the present invention provides a storage medium storing a program that, when executed by a processor, implements the method as described in any one of the first to third aspects.

[0046] Ninthly, the present invention provides an electronic device including a memory and a processor communicatively connected to the memory, the memory storing a program that, when executed by the processor, implements the method as described in any one of the first to third aspects.

[0047] In a tenth aspect, the present invention provides a communication system comprising: a 5G communication switch communicatively connected to the electronic device as described in the ninth aspect for communication between the electronic device, the main protection device, and the branch protection device.

[0048] Through the above technical solution, the present invention has the following beneficial effects:

[0049] It eliminates the need for dedicated fiber optic channels, solving the problem of electrified railways lacking dedicated fiber optic channels to achieve wide-area protection and control functions for traction power supply, and saving construction costs.

[0050] Information transmission and reception based on 5G communication technology are not affected by interference from dedicated fiber optic communication media or communication forwarding equipment, thus improving the reliability of communication in the traction power supply wide-area protection and control system.

[0051] Each protection and control device has a unique APPID address and GOOSE group in the process layer network. Only information in related information groups is transmitted in the network, which reduces data traffic in the network and improves the stability of data transmission.

[0052] The method of calculating channel delay using GOOSE messages can calculate the channel delay in real time, effectively improving the data error caused by the fixed delay calculation method used in existing optical fibers.

[0053] The use of the Lagrange quadratic interpolation synchronization algorithm can provide more reliable data support for wide-area protection systems, increase the reliability of power supply arm protection, improve the accuracy of fault location, and ensure the safety and reliability of self-healing reconfiguration, thereby further ensuring the reliability, speed and selectivity of relay protection. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the traction power supply system's wide-area protection and control system and communication system;

[0055] Figure 2 This is a schematic diagram of the steps of the control method one provided by the present invention;

[0056] Figure 3 This is a schematic diagram of the synchronous calculation steps provided by the present invention;

[0057] Figure 4 This is a schematic diagram of the steps of the control method two provided by the present invention;

[0058] Figure 5 This is a schematic diagram of the steps of the control method three provided by the present invention;

[0059] Figure 6 This is a schematic diagram of the communication system provided by the present invention. Detailed Implementation

[0060] The present disclosure will be further described below with reference to the embodiments shown in the accompanying drawings.

[0061] Reference Figure 1The traction power supply system includes traction substations, section substations, and the traction network. Both traction substations and section substations are connected to the traction network via circuit breakers. Traction substations are the main substations, and section substations are the branch substations, with multiple branch substations. The wide-area protection and control system includes protection devices located at the traction substations and each section substation. 5G communication switches are installed at both the main substations and each branch substation for communication between the various protection devices.

[0062] Reference Figure 2 The first aspect of this invention provides a communication method that utilizes 5G communication technology for a main protection device, comprising the following steps:

[0063] S101. Receive telemetry information from the protection devices of each branch station through the communication information group established by the process layer network with the power supply arm as the unit;

[0064] S102. Calculate the channel delay at the moment of receiving telemetry information sent by the protection devices of each branch station;

[0065] S103. Based on the channel delay, find the telemetry information of each substation protection device at the corresponding time, perform synchronous calculations, so that the main substation protection device can make decisions and execute the relevant logic of power supply arm protection, fault location and self-healing reconfiguration.

[0066] S104. Send execution instructions to the corresponding substation protection device through the communication information group.

[0067] The channel delay calculated in step S102 for receiving telemetry information from each substation protection device includes:

[0068] The main protection device sends a GOOSE message with a channel delay instruction to the branch protection device. The branch protection device receives the GOOSE message sent by the main protection device after a channel delay Td. After a fixed delay Δt, the branch protection device sends a GOOSE message with a channel delay feedback instruction to the main protection device. After a channel delay Td, the main protection device receives the GOOSE message with the channel delay feedback instruction.

[0069] Let t1 be the time when the main protection device sends the GOOSE signal after a channel delay. After a channel delay of Td, the branch protection device receives the GOOSE signal from the main protection device. After a fixed delay of Δt, it sends a delayed feedback GOOSE signal (including the timestamp of its own protection device). The main protection device receives the GOOSE signal after another channel delay of Td, at which point the time of receiving the GOOSE signal is t2. The channel delay Td can be determined according to the following formula:

[0070] Td=(t2-t1-△t) / 2

[0071] Where t1 is the time when the main protection device sends the channel delay command to the branch protection device; t2 is the time when the main protection device receives the channel delay feedback command from the branch protection device; △t is the fixed delay; and Td is the channel delay.

[0072] Reference Figure 3 In step S103, the synchronous calculation includes:

[0073] S1031. After receiving data from the branch protection device at time t2, the main protection device uses the data from time t2-Td to perform calculations;

[0074] S1032. Use the Lagrange quadratic interpolation method to fit the data at time t2-Td and perform calculations.

[0075] Because data records are time-sensitive, the data for time t2-Td may not be found in the historical records. In this case, you can look up the recorded data y0 corresponding to x0 at that time, the data y1 corresponding to x1 before that time, and the data y2 corresponding to x2 after that time. Then, use the Lagrange quadratic interpolation method to fit the data of the main protection device for time t2-Td, as detailed in the following formula:

[0076]

[0077] Where y represents the fitted data at time t2-Td, x0 represents the adjacent time before t2-Td, x1 represents the adjacent time after t2-Td, x2 represents the second adjacent time after t2-Td, y0 represents the data at time x0, y1 represents the data at time x1, and y2 represents the data at time x2.

[0078] When x takes the time t2-Td, the calculated y is the fitted data value corresponding to that time. Then, based on the current data and the data of the substation protection device, a wide-area protection decision for the power supply arm is made.

[0079] In step S101, the communication information group transmits GOOSE messages based on the IEC61850 standard. Each branch protection device has a unique APPID address and GOOSE group. Protection devices that form a communication information group communicate with each other, and communication is blocked for protection and control devices that do not form a communication information group.

[0080] Reference Figure 4 Secondly, the present invention provides a communication method based on 5G communication and used in a branch protection device, comprising the following steps:

[0081] S201. Telemetry information sent to the main protection device through the communication information group established by the process layer network with the power supply arm as the unit, so that the main protection device can make decisions and execute relevant logical judgments such as power supply arm protection, fault location, and self-healing reconfiguration after synchronous calculation.

[0082] S202. Receive execution instructions sent by the main protection device through the communication information group.

[0083] It should be noted that the communication information group in step S201 transmits GOOSE messages based on the IEC61850 standard. Each branch protection device has a unique APPID address and GOOSE group. Protection devices that form a communication information group communicate with each other, and communication is blocked for protection and control devices that do not form a communication information group.

[0084] Reference Figure 5 Thirdly, the present invention provides a communication method based on 5G communication and used in a 5G communication switch, comprising the following steps:

[0085] S301. Establish a communication information group in the process layer network with the power supply arm as the unit;

[0086] S302. Receive telemetry information sent by each substation protection device through the communication information group, and send the telemetry information to the main substation protection device so that the main substation protection device can make decisions and execute the relevant logical judgments of power supply arm protection, fault location and self-healing reconfiguration after synchronous calculation.

[0087] S303. Receive control commands sent by the main protection device through the communication information group, and send the control commands to the corresponding branch protection device.

[0088] By employing the above communication method, this embodiment has the following beneficial effects:

[0089] It eliminates the need for dedicated fiber optic channels, solving the problem of electrified railways lacking dedicated fiber optic channels to achieve wide-area protection and control functions for traction power supply, and saving construction costs.

[0090] Information transmission and reception based on 5G communication technology are not affected by interference from dedicated fiber optic communication media or communication forwarding equipment, thus improving the reliability of communication in the traction power supply wide-area protection and control system.

[0091] Each protection and control device has a unique APPID address and GOOSE group in the process layer network. Only information in related information groups is transmitted in the network, which reduces data traffic in the network and improves the stability of data transmission.

[0092] Fourthly, the present invention provides a communication device based on 5G communication technology and used in a main protection device, comprising:

[0093] Telemetry information receiving unit; used to receive telemetry information sent by the protection devices of each substation through the communication information group established in the process layer network with the power supply arm as the unit;

[0094] The channel delay calculation unit is used to calculate the channel delay at the moment of receiving telemetry information from the protection devices of each branch station;

[0095] The synchronous calculation unit is used to find the telemetry information of each substation protection device at the corresponding time based on the channel delay, and perform synchronous calculations so that the main substation protection device can make decisions and execute the relevant logical judgments of power supply arm protection, fault location and self-healing reconfiguration.

[0096] The instruction sending unit is used to send execution instructions to the corresponding substation protection device through the communication information group.

[0097] Fifthly, the present invention provides a communication device based on 5G communication technology and used in a branch office protection device, comprising:

[0098] The telemetry information sending unit sends telemetry information to the main substation protection device through the communication information group established in the process layer network with the power supply arm as the unit, so that the main substation protection device can make decisions and execute the relevant logical judgments of power supply arm protection, fault location and self-healing reconfiguration after synchronous calculation.

[0099] The instruction receiving unit is used to receive execution instructions sent by the main protection device through the communication information group.

[0100] Sixthly, the present invention provides a communication device based on 5G communication technology and used in a 5G communication switch, comprising:

[0101] A communication unit is used to establish communication information groups in a process layer network based on power supply arms.

[0102] The telemetry information receiving and sending unit is used to receive telemetry information sent by each substation protection device through the communication information group, and send the telemetry information to the main substation protection device so that the main substation protection device can make decisions and execute the relevant logical judgments of power supply arm protection, fault location and self-healing reconfiguration after synchronous calculation.

[0103] The instruction receiving and sending unit is used to receive control instructions sent by the main protection device through the communication information group, and to send the control instructions to the corresponding branch protection device.

[0104] In a seventh aspect, the present invention provides a computer program that, when executed by a processor, implements the method as described in any one of the first to third aspects.

[0105] Eighthly, the present invention provides a storage medium storing a program that, when executed by a processor, implements the method as described in any one of the first to third aspects.

[0106] Ninthly, the present invention provides an electronic device including a memory and a processor communicatively connected to the memory, the memory storing a program that, when executed by the processor, implements the method as described in any one of the first to third aspects.

[0107] Reference Figure 6 In a tenth aspect, the present invention provides a communication system comprising an electronic device as described in the ninth aspect and a 5G communication switch communicatively connected to the electronic device and used for communication between the electronic device, a main protection device, and a branch protection device.

[0108] The various embodiments in this disclosure are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0109] The scope of protection of this disclosure is not limited to the embodiments described above. Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its scope and spirit. If such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, then the intent of this disclosure also includes such modifications and variations.

Claims

1. A communication method, characterized in that, The communication method is based on 5G communication and is used in the main protection device, including the following steps: Telemetry information from each branch protection device is received through a communication information group established in the process layer network with the power supply arm as the unit; each branch protection device has a unique APPID address and GOOSE group, and the protection devices that constitute the communication information group communicate with each other, while the protection measurement and control devices that do not constitute the communication information group are shielded from communication. Calculate the channel delay at the moment of receiving telemetry information from the protection devices of each branch station; Based on the channel delay, the telemetry information of each substation protection device at the corresponding time is retrieved, and synchronous calculations are performed to enable the main substation protection device to make decisions and execute relevant logical judgments for power supply arm protection, fault location, and self-healing reconfiguration. The synchronous calculations include: after receiving data from the substation protection device at time t2, the main substation protection device performs calculations using data from time t2 to Td; and using Lagrange quadratic interpolation to fit the data from time t2 to Td for further calculations. t2 is the time when the main substation protection device receives the channel delay feedback command from the substation protection device; Td is the channel delay. The execution command is sent to the corresponding branch protection device through the communication information group; The calculation of the channel delay at the time of receiving telemetry information from each branch protection device includes: The channel delay is calculated using the following formula: Where: t1 is the time when the main protection device sends the channel delay command to the branch protection device; For fixed delay; The step of searching for telemetry information of each branch protection device at the corresponding time based on the channel delay and performing synchronous calculations includes: After receiving data from the branch protection device at time t2, the main protection device searches for the corresponding data at that time, before that time, and after that time, and uses the following formula to fit the data of the main protection device at time t2-Td: Wherein, when x takes the time t2-Td, y is the fitted data at time t2-Td, x0 is the adjacent time before time t2-Td, x1 is the adjacent time after time t2-Td, x2 is the second adjacent time after time t2-Td, y0 is the data at time x0, y1 is the data at time x1, and y2 is the data at time x2.

2. The communication method according to claim 1, characterized in that, The communication information group transmits GOOSE messages based on the IEC 61850 standard.

3. A communication method, characterized in that, The communication method, based on 5G communication and used in branch protection devices, includes the following steps: Telemetry information is sent to the main substation protection device through a communication information group established in the process layer network with the power supply arm as the unit. This allows the main substation protection device to make decisions and execute relevant logical judgments for power supply arm protection, fault location, and self-healing reconfiguration after synchronous calculation. The synchronous calculation includes: after receiving data from the branch substation protection device at time t2, the main substation protection device performs calculations using data from time t2 to Td; and the data from time t2 to Td is fitted using Lagrange quadratic interpolation for further calculations. t2 is the time when the main substation protection device receives the channel delay feedback command from the branch substation protection device; Td is the channel delay. The execution command sent by the main protection device is received through the communication information group; Each of the branch protection devices has a unique APPID address and GOOSE group. The protection devices that form the communication information group communicate with each other, and the protection measurement and control devices that do not form the communication information group are blocked from communication. Wherein, the channel delay: Where: t1 is the time when the main protection device sends the channel delay command to the branch protection device; For fixed delay; The synchronous calculation includes: After receiving data from the branch protection device at time t2, the main protection device searches for the corresponding data at that time, before that time, and after that time, and uses the following formula to fit the data of the main protection device at time t2-Td: Wherein, when x takes the time t2-Td, y is the fitted data at time t2-Td, x0 is the adjacent time before time t2-Td, x1 is the adjacent time after time t2-Td, x2 is the second adjacent time after time t2-Td, y0 is the data at time x0, y1 is the data at time x1, and y2 is the data at time x2.

4. The communication method according to claim 3, characterized in that, The communication information group transmits GOOSE messages based on the IEC 61850 standard.

5. A communication method, characterized in that, The communication method is based on 5G communication and used in a 5G communication switch, and includes the following steps: Establish a communication information group in the process layer network with the power supply arm as the unit; The communication information group receives telemetry information sent by each branch protection device and sends the telemetry information to the main protection device so that the main protection device can make decisions and execute relevant logical judgments for power supply arm protection, fault location, and self-healing reconfiguration after synchronous calculation. The synchronous calculation includes: after receiving data from the branch protection device at time t2, the main protection device performs calculations using data from time t2 to Td; and uses Lagrange quadratic interpolation to fit the data from time t2 to Td for calculation. t2 is the time when the main protection device receives the channel delay feedback command from the branch protection device; Td is the channel delay. The system receives control commands sent by the main protection device through the communication information group and sends the control commands to the corresponding branch protection device. Each branch protection device has a unique APPID address and GOOSE group. Protection devices that form the communication information group communicate with each other, and communication is blocked for protection and control devices that do not form the communication information group. Wherein, the channel delay: Where: t1 is the time when the main protection device sends the channel delay command to the branch protection device; For fixed delay; The synchronous calculation includes: After receiving data from the branch protection device at time t2, the main protection device searches for the corresponding data at that time, before that time, and after that time, and uses the following formula to fit the data of the main protection device at time t2-Td: Wherein, when x takes the time t2-Td, y is the fitted data at time t2-Td, x0 is the adjacent time before time t2-Td, x1 is the adjacent time after time t2-Td, x2 is the second adjacent time after time t2-Td, y0 is the data at time x0, y1 is the data at time x1, and y2 is the data at time x2.

6. A communication device, said communication device being based on 5G communication technology and used in a main protection device, characterized in that, include: Telemetry information receiving unit; This is used to receive telemetry information from the protection devices of each branch station through a communication information group established in the process layer network with the power supply arm as the unit; each protection device of the branch station has a unique APPID address and GOOSE group, the protection devices that constitute the communication information group communicate with each other, and the protection measurement and control devices that do not constitute the communication information group are shielded from communication. The channel delay calculation unit is used to calculate the channel delay at the moment of receiving telemetry information sent by the protection devices of each branch station; The synchronous calculation unit is used to find the telemetry information of each substation protection device at the corresponding time based on the channel delay, and perform synchronous calculations so that the main substation protection device can make decisions and execute relevant logical judgments for power supply arm protection, fault location, and self-healing reconfiguration. The synchronous calculation includes: after receiving data from the substation protection device at time t2, the main substation protection device performs calculations using data from time t2 to Td; and fitting the data from time t2 to Td using Lagrange quadratic interpolation for calculation. t2 is the time when the main substation protection device receives the channel delay feedback command from the substation protection device; Td is the channel delay. The instruction sending unit is used to send an execution instruction to the corresponding substation protection device through the communication information group; Wherein, the channel delay: Where: t1 is the time when the main protection device sends the channel delay command to the branch protection device; For fixed delay; The synchronous calculation includes: After receiving data from the branch protection device at time t2, the main protection device searches for the corresponding data at that time, before that time, and after that time, and uses the following formula to fit the data of the main protection device at time t2-Td: Wherein, when x takes the time t2-Td, y is the fitted data at time t2-Td, x0 is the adjacent time before time t2-Td, x1 is the adjacent time after time t2-Td, x2 is the second adjacent time after time t2-Td, y0 is the data at time x0, y1 is the data at time x1, and y2 is the data at time x2.

7. A communication device, said communication device being based on 5G communication technology and used in a branch protection device, characterized in that, include: The telemetry information sending unit sends telemetry information to the main substation protection device through a communication information group established in the process layer network based on the power supply arm as the unit. This allows the main substation protection device to make decisions and execute relevant logical judgments for power supply arm protection, fault location, and self-healing reconfiguration after performing synchronous calculations. The synchronous calculation includes: after receiving data from the branch substation protection device at time t2, the main substation protection device performs calculations using data from time t2 to Td; and the data from time t2 to Td is fitted using Lagrange quadratic interpolation for further calculations. t2 is the time when the main substation protection device receives the channel delay feedback command from the branch substation protection device; Td is the channel delay. The instruction receiving unit is used to receive the execution instruction sent by the main protection device through the communication information group; Each of the branch protection devices has a unique APPID address and GOOSE group. The protection devices that form the communication information group communicate with each other, and the protection measurement and control devices that do not form the communication information group are blocked from communication. Wherein, the channel delay: Where: t1 is the time when the main protection device sends the channel delay command to the branch protection device; For fixed delay; The synchronous calculation includes: After receiving data from the branch protection device at time t2, the main protection device searches for the corresponding data at that time, before that time, and after that time, and uses the following formula to fit the data of the main protection device at time t2-Td: Wherein, when x takes the time t2-Td, y is the fitted data at time t2-Td, x0 is the adjacent time before time t2-Td, x1 is the adjacent time after time t2-Td, x2 is the second adjacent time after time t2-Td, y0 is the data at time x0, y1 is the data at time x1, and y2 is the data at time x2.

8. A communication device, said communication device being based on 5G communication technology and used in a 5G communication switch, characterized in that, include: A communication unit is used to establish communication information groups in a process layer network based on power supply arms. The telemetry information receiving and transmitting unit is used to receive telemetry information sent by each branch protection device through the communication information group, and send the telemetry information to the main protection device so that the main protection device can make decisions and execute relevant logical judgments for power supply arm protection, fault location, and self-healing reconfiguration after synchronous calculation; wherein, the synchronous calculation includes: after the main protection device receives the data from the branch protection device at time t2, it performs calculations using the data at time t2-Td; and it performs calculations using the Lagrange quadratic interpolation method to fit the data at time t2-Td; t2 is the time when the main protection device receives the channel delay feedback command from the branch protection device; Td is the channel delay; The instruction receiving and sending unit is used to receive control instructions sent by the main protection device through the communication information group, and send the control instructions to the corresponding branch protection device; Each branch protection device has a unique APPID address and GOOSE group. Protection devices that form the communication information group communicate with each other, and communication is blocked for protection and control devices that do not form the communication information group. Wherein, the channel delay: Where: t1 is the time when the main protection device sends the channel delay command to the branch protection device; For fixed delay; The synchronous calculation includes: After receiving data from the branch protection device at time t2, the main protection device searches for the corresponding data at that time, before that time, and after that time, and uses the following formula to fit the data of the main protection device at time t2-Td: Wherein, when x takes the time t2-Td, y is the fitted data at time t2-Td, x0 is the adjacent time before time t2-Td, x1 is the adjacent time after time t2-Td, x2 is the second adjacent time after time t2-Td, y0 is the data at time x0, y1 is the data at time x1, and y2 is the data at time x2.

9. A storage medium, characterized in that, The storage medium stores a program that, when executed by a processor, implements the method as described in any one of claims 1 to 5.

10. An electronic device, characterized in that, The method includes a memory and a processor communicatively connected to the memory, the memory storing a program that, when executed by the processor, implements the method as described in any one of claims 1 to 5.

11. A communication system, characterized in that, include: The electronic device as described in claim 10, and a 5G communication switch communicatively connected to the electronic device for communication between the electronic device, the main protection device, and the branch protection device.

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