High-fault-tolerant-rate dispatching remote transmission network communication method for power system

Abstract

The invention belongs to the technical field of power system automation, and discloses a power system high-fault-tolerant-rate dispatching remote transmission network communication method, which comprises the following steps of: establishing a data model based on a service scene, and defining a data specification; in communication constant value negotiation, a reasonable strategy is adopted for different channels and constant value change conditions; the data message contains various information for verification and management, and the data substation performs multi-dimensional verification on the message; the channel state is judged based on the serial number difference of the master station and the substation, and an abnormal channel can be restarted in time. And in the interaction process, various operation message interactions are standardized. Through the measures, accurate transmission and effective management of data are realized, data loss and errors are reduced, channel stability and communication reliability are improved, and high-fault-tolerant-rate operation of a power system dispatching remote transmission network is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of power system automation, and relates to a dispatching remote transmission network communication method with high fault tolerance for power systems. Background Art

[0002] The IEC 60870-5-104 protocol is currently widely used as the core data exchange protocol in the dispatching and teletransmission systems of renewable energy power plants and substations. This protocol presents the following technical challenges in implementing communication between data master stations and data substations: First, due to the information address allocation mechanism, there is a hard upper limit on the amount of telemetry and telesignaling data that can be carried by a single channel. When the number of uplink points from a data substation exceeds this threshold, multiple TCP channels must be established to meet data transmission needs. This not only increases system complexity but also leads to low utilization of communication resources. Second, this protocol lacks the ability to discern data based on business scenarios and cannot predict and filter data plausibility. As a result, abnormal or unreasonable data is indiscriminately uploaded to the data master station, seriously affecting the master station's data processing efficiency and decision-making accuracy. Furthermore, the internal communication parameters between the data master and data substations must be strictly consistent; even slight parameter differences can cause process stalls and discontinuous data transmission.

[0003] To address the above issues, existing technologies typically adopt the following solutions: design a background scanning function on the data substation side to screen the rationality of the data to be uploaded through a pre-process; strictly set communication parameters on the data master side, and actively close the channel and initiate a reconnection when an abnormal message interaction is detected. However, practice has shown that the above solution can only alleviate the problem in the short term. After long-term operation, the channel will still frequently disconnect and reconnect. The technical bottlenecks of process jams and discontinuous data transmission have not been fundamentally resolved, seriously affecting the safe and stable operation and scheduling efficiency of the new energy power generation system. Therefore, there is an urgent need for a new data message interaction method that can break through the limitations of traditional protocols and improve the reliability and robustness of data interaction. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of frequent channel interruption and reconnection, process jamming and discontinuous data transmission in the prior art, and to provide a dispatching remote transmission network communication method with high fault tolerance for power systems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A dispatching remote transmission network communication method with high fault tolerance for power systems, acting on data substations and data master stations, comprising:

[0007] Step 1: The data substation builds a data model based on the business scenario. The model includes the units and ranges of electrical equipment voltage levels, CT ratios, rated capacity, and meteorological data.

[0008] Step 2: Based on the data model, the data master station exchanges messages with the data substation to complete the communication setting negotiation;

[0009] Step 3: When the data substation interacts with the data master station, the data master station checks the data message and determines whether to trigger a channel restart based on the relationship between the sequence number difference between the data master station and the data substation and the preset threshold.

[0010] A further improvement of the present invention is:

[0011] Furthermore, the communication constant negotiation is as follows: when a new channel is established between the data master and the data substation, the data master sends a full constant negotiation message with an empty constant, and the data substation sends a message containing the communication constant to the data master; when the channel between the data master and the data substation is not a new channel and the data substation constant has not changed, there is no need for repeated negotiation; when the communication constant of the digital substation changes, it actively sends a constant negotiation message to the data master; the link established by the same IP address and different port numbers of the data master is a non-new channel.

[0012] Furthermore, the data message includes control information and data information, wherein the control information includes the start character 35H, message length, data master station sending sequence number, data substation sending sequence number, frame type, frame purpose and data message content;

[0013] The startup character 35H is used by the program to quickly confirm the location of the application message header;

[0014] The message length is used to locate the message header, check whether the application layer message is missing bytes according to the message length, and determine the message tail, start character and message length for application layer message framing;

[0015] The data master station sends the sequence number: the sequence number of the message sent by the data master station, after each frame is sent, the sequence number + 1H; in the message sent by the data slave station, the data master station sends the expected need after the previous frame sequence number + 1H. If the difference between the expected need and the message sequence number received in the next frame is greater than the set restart value, the channel will automatically restart;

[0016] The data substation sending sequence number: the sequence number of the message sent by the data substation, after each frame is sent, the sequence number + 1H; in the message sent by the data master station, the data substation sending need is the expected need after the previous frame sequence number + 1H. If the difference between the expected need and the message sequence number received in the next frame is greater than the set restart value, the channel will automatically restart;

[0017] The frame type is used to describe the type of the frame message; the frame purpose is used to describe the purpose of the frame message; the content of the data information is the information contained in the data message.

[0018] Furthermore, the frame types include fixed value negotiation 00H, total data response 01H, total data response end 02H, telemetry data 03H, telesignaling data 04H, remote control 05H, set point 06H and energy data 07H.

[0019] Furthermore, the frame purpose includes: total data telemetry uploading 00H, total data telesignal uploading 01H, fixed value data uploading 02H, request 03H, request permission 04H, execution 05H, execution confirmation 06H, execution success 07H, electricity data uploading 08H, telemetry change uploading 09H and telesignal change uploading 0AH.

[0020] Furthermore, the data master station verifies the data message including: measuring the current range of -1.1Ie to +1.1Ie, in units of A / kA; the voltage range of 0 to Ue+20, in units of V / kV; the power factor range of 0 to 1, the power range of -1.5Pe to +1.5Pe, in units of W, kW, MW; and the frequency range of 45 to 55Hz.

[0021] Furthermore, the data substation interacts with the data master station, including:

[0022] When the channel is first established, the data master station sends a communication fixed value negotiation message, and the data slave station replies with a fixed value negotiation confirmation message;

[0023] The data substation sends a data message for fixed value negotiation, and the data master station replies with a data confirmation message for fixed value negotiation;

[0024] The data substation sends a full data message, and the data master station replies with a full data message confirmation;

[0025] The data substation sends a business data message, and the data master station replies with a business data confirmation message;

[0026] The data master station sends a remote control operation request message, and the data slave station replies with a remote control permission message;

[0027] The data master station sends a remote control execution message, and the data slave station replies with a remote control execution confirmation message;

[0028] The data substation replies with a message indicating successful remote control execution;

[0029] The data master station sends a point setting request message, and the data slave station replies with a point setting permission message;

[0030] The data master station sends a set point execution message, and the data substation replies with a set point execution confirmation message;

[0031] The data substation replies with a message indicating that the setting point has been successfully executed.

[0032] Further, the data master station sends a remote control operation request message, and the data substation replies with a remote control permission message, including: the data master station sends a remote control request message, wherein the frame type is 05H and the frame destination is 03H; the data substation replies with a remote control permission message, wherein the frame destination is 04H;

[0033] The data master station sends a remote control execution message, and the data substation replies with a remote control execution confirmation message, including: the data master station sends a remote control execution message with a frame destination of 05H, and the data substation replies with an execution confirmation message of 06H and an execution success message of 07H in sequence.

[0034] Furthermore, the point setting operation process includes: the master station sends a point setting request message, in which the frame type is 06H and the frame destination is 03H; the data substation replies with a point setting permission message, in which the frame destination is 04H; the data master station sends a point setting execution message, in which the frame destination is 05H, and the substation replies with an execution confirmation message 06H and an execution success message 07H in turn.

[0035] Furthermore, based on the relationship between the sequence number difference between the data master station and the data substation and the preset threshold, it is determined whether to trigger the channel restart. Specifically: every time the data master station and the data substation send a frame of message, the sequence number is automatically increased by 1H; the sending sequence number in the receiving party's message is the previous frame sequence number plus 1H. If the difference with the actual receiving sequence number exceeds the set threshold, the channel restart is triggered.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] This invention establishes a data model based on business scenarios to clarify data specifications. In communication and fixed value negotiation, it adopts appropriate strategies tailored to different channels and fixed value changes. Data messages contain a variety of information for verification and management, and data substations perform multi-dimensional verification of messages. Channel status is determined based on the sequence number difference between the master and substations, allowing for the timely restart of abnormal channels. In terms of interaction processes, various operational message interactions are standardized. These measures enable accurate data transmission and effective management, reduce data loss and errors, improve channel stability and communication reliability, and ensure high-fault-tolerance operation of the power system dispatching telemetry network. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 Schematic diagram of the flow of the high fault-tolerance dispatching remote transmission network communication method for the power system of the present invention;

[0040] Figure 2 A schematic diagram of the structure of a data message. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0044] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0047] The present invention is described in further detail below with reference to the accompanying drawings:

[0048] See also Figure 1 The present invention provides a high-fault-tolerance dispatching remote transmission network communication method for a power system, which acts on a data substation and a data master station, and includes:

[0049] S101: The data substation builds a data model based on the business scenario. The model includes the units and ranges of electrical equipment voltage levels, CT ratios, rated capacities, and meteorological data.

[0050] The data content based on the business scenario is shown in Table 1, specifically:

[0051] Table 1

[0052] Serial number Business data types Rationality Judgment unit 1 Measuring current -1.1Ie~+1.1Ie A.KA 2 Voltage 0~Ue+20 V, KA 3 power -1.5Pe~+1.5Pe W, KW, MW 4 Power Factor 0～1 5 frequency 45～55 Hz 6 Ambient temperature -70～+70 degrees Celsius 7 relative humidity 0～100 8 wind direction 0～360 10 wind speed 0～60 M / s

[0053] S102, based on the data model, the data master station exchanges messages with the data substation to complete the communication setting negotiation;

[0054] The communication constant negotiation is specifically as follows: when a new channel is established between the data master station and the data substation, when the new channel is established for the first time, the data master station sends a full constant negotiation message with an empty constant, and the data substation sends a message containing the communication constant to the data master station; when the channel between the data master station and the data substation is not a new channel and the data substation constant has not changed, there is no need to repeat the negotiation; when the communication constant of the digital substation changes, it actively sends a constant negotiation message to the data master station; the link established by the same IP address and different port numbers of the data master station is a non-new channel.

[0055] See also Figure 2 The data message includes control information and data information, wherein the control information includes the start character 35H, message length, data master station sending sequence number, data substation sending sequence number, frame type and frame purpose;

[0056] The startup character 35H is used by the program to quickly confirm the location of the application message header;

[0057] The message length is used to locate the message header, check whether the application layer message is missing bytes according to the message length, and determine the message tail, start character and message length for application layer message framing;

[0058] The data master station sends the sequence number: the sequence number of the message sent by the data master station, after each frame is sent, the sequence number + 1H; in the message sent by the data slave station, the data master station sends the expected need after the previous frame sequence number + 1H. If the difference between the expected need and the message sequence number received in the next frame is greater than the set restart value, the channel will automatically restart;

[0059] The data substation sending sequence number: the sequence number of the message sent by the data substation, after each frame is sent, the sequence number + 1H; in the message sent by the data master station, the data substation sending need is the expected need after the previous frame sequence number + 1H. If the difference between the expected need and the message sequence number received in the next frame is greater than the set restart value, the channel will automatically restart;

[0060] The frame type is used to describe the type of the current frame message; the frame purpose is used to describe the purpose of the current frame message; and the data message content is the data information contained in the message.

[0061] As shown in Table 2, the frame types include fixed value negotiation 00H, total data response 01H, total data response end 02H, telemetry data 03H, telesignaling data 04H, remote control 05H, set point 06H and energy data 07H.

[0062] Table 2: Frame types

[0063]

[0064]

[0065] As shown in Table 3, the frame purposes include: total data telemetry uploading 00H, total data telesignal uploading 01H, fixed value data uploading 02H, request 03H, request permission 04H, execution 05H, execution confirmation 06H, execution success 07H, electricity data uploading 08H, telemetry change uploading 09H and telesignal change uploading 0AH.

[0066] Table 3: Frame Purpose

[0067] Serial number Frame Purpose Frame Purpose Explanation 1 00H Total data telemetry upload 2 01H Total data telesignaling 3 02H Send fixed value data 4 03H ask 5 04H Request permission 6 05H implement 7 06H Execution Confirmation 8 07H Execution successful 9 08H Energy data upload 10 09H Telemetry change upload 11 0AH Remote signal change and upload

[0068] S103, when the data substation interacts with the data master station, the data master station checks the data message and determines whether to trigger channel restart based on the relationship between the sequence number difference between the data master station and the data substation and a preset threshold.

[0069] The data master station verifies the data message, specifically: the measurement current range is -1.1Ie~+1.1Ie, the unit is A / kA; the voltage range is 0~Ue+20, the unit is V / kV; the power factor range is 0~1, the power range is -1.5Pe~~+1.5Pe, the unit is W, kW, MW; the frequency range is 45~55Hz.

[0070] If the data message checked by the data master station exceeds the normal range, it indicates that the data message is abnormal and the data master station does not send the data message.

[0071] The data substation interacts with the data master station, including:

[0072] When the channel is first established, the data master station sends a communication fixed value negotiation message, and the data slave station replies with a fixed value negotiation confirmation message;

[0073] The data substation sends a data message for fixed value negotiation, and the data master station replies with a data confirmation message for fixed value negotiation;

[0074] The data substation sends a full data message, and the data master station replies with a full data message confirmation;

[0075] The data substation sends a business data message, and the data master station replies with a business data confirmation message;

[0076] The data master station sends a remote control operation request message, and the data slave station replies with a remote control permission message;

[0077] The data master station sends a remote control execution message, and the data slave station replies with a remote control execution confirmation message;

[0078] The data substation replies with a message indicating successful remote control execution;

[0079] The data master station sends a point setting request message, and the data slave station replies with a point setting permission message;

[0080] The data master station sends a set point execution message, and the data substation replies with a set point execution confirmation message;

[0081] The data substation replies with a message indicating that the setting point has been successfully executed.

[0082] The data master station sends a remote control operation request message, and the data substation replies with a remote control permission message, including: the data master station sends a remote control request message, wherein the frame type is 05H and the frame destination is 03H; the data substation replies with a remote control permission message, wherein the frame destination is 04H;

[0083] The data master station sends a remote control execution message, and the data substation replies with a remote control execution confirmation message, including: the data master station sends a remote control execution message with a frame destination of 05H, and the data substation replies with an execution confirmation message of 06H and an execution success message of 07H in sequence.

[0084] The point setting process includes: the master station sends a point setting request message with a frame type of 06H and a frame destination of 03H; the data slave station replies with a point setting permission message with a frame destination of 04H; the data master station sends a point setting execution message with a frame destination of 05H, to which the slave station replies, in sequence, with an execution confirmation message of 06H and an execution success message of 07H. The determination of whether to trigger a channel restart is based on the relationship between the sequence number difference between the data master station and the data slave station and a preset threshold. Specifically, the sequence number automatically increments by 1H with each message frame sent by the data master station and the data slave station. The sent sequence number in the receiving message is the previous frame sequence number plus 1H. If the difference between the received sequence number and the actual received sequence number exceeds the preset threshold, a channel restart is triggered.

[0085] When the data master station interacts with the data substation, the specific content of the data message is:

[0086] The data master sends a fixed value negotiation request message, specifically:

[0087]

[0088] The data substation sends a fixed value negotiation permission message, specifically:

[0089]

[0090] The data substation sends a fixed value negotiation data message:

[0091]

[0092] The data master sends a fixed value negotiation data confirmation message: mirror

[0093]

[0094] The contents of the fixed value negotiation are shown in Table 4, specifically:

[0095] Table 4

[0096]

[0097]

[0098] The data substation sends a total data response message: telemetry

[0099]

[0100] The data substation sends a total data response message: remote signal

[0101]

[0102] The data substation sends the total data response end message:

[0103]

[0104] Data substation sends data change message: telemetry

[0105]

[0106]

[0107] Data substation sends data change message: remote signal

[0108]

[0109] The data master sends a remote control request message:

[0110]

[0111] The data substation sends a remote control request permission message:

[0112]

[0113] The data master sends the remote control execution message:

[0114]

[0115] The data substation sends a remote control execution confirmation message:

[0116]

[0117] The data substation sends a remote control execution success message:

[0118]

[0119] The remote control contents are shown in Table 5, specifically:

[0120] Table 5

[0121] Serial number Control content Control content explanation 1 0000 Opening 2 00FF Closing

[0122] The data master sends a set point request message:

[0123]

[0124] The data substation sends a set point request permission message:

[0125]

[0126] The data master sends the set point execution message:

[0127]

[0128] The data substation sends a confirmation message for setting point execution:

[0129]

[0130]

[0131] The data substation sends a message indicating that the setting point has been successfully executed:

[0132]

[0133] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or 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 high fault-tolerant dispatching remote transmission network communication method for a power system, characterized in that: Acts on data substations and data master stations, including: Step 1: The data substation builds a data model based on the business scenario. The model includes the units and ranges of electrical equipment voltage levels, CT ratios, rated capacity, and meteorological data. Step 2: Based on the data model, the data master station exchanges messages with the data substation to complete the communication setting negotiation; Step 3: When the data substation interacts with the data master station, the data master station checks the data message and determines whether to trigger a channel restart based on the relationship between the sequence number difference between the data master station and the data substation and the preset threshold.

2. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 1, characterized in that: The communication constant negotiation is specifically as follows: when a new channel is established between the data master station and the data substation, the data master station sends a full constant negotiation message with an empty constant, and the data substation sends a message containing the communication constant to the data master station; when the channel between the data master station and the data substation is not a new channel and the data substation constant has not changed, there is no need to repeat the negotiation; when the communication constant of the digital substation changes, it actively sends a constant negotiation message to the data master station; the link established by the same IP address and different port numbers of the data master station is a non-new channel.

3. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 2, characterized in that: The data message includes control information and data information, wherein the control information includes the start character 35H, message length, data master station sending sequence number, data substation sending sequence number, frame type, and frame purpose; The startup character 35H is used by the program to quickly confirm the location of the application message header; The message length is used to locate the message header, check whether the application layer message is missing bytes according to the message length, and determine the message tail, start character and message length for application layer message framing; The data master station sends the sequence number: the sequence number of the message sent by the data master station, after each frame is sent, the sequence number + 1H; in the message sent by the data slave station, the data master station sends the expected need after the previous frame sequence number + 1H. If the difference between the expected need and the message sequence number received in the next frame is greater than the set restart value, the channel will automatically restart; The data substation sending sequence number: the sequence number of the message sent by the data substation, after each frame is sent, the sequence number + 1H; in the message sent by the data master station, the data substation sending need is the expected need after the previous frame sequence number + 1H. If the difference between the expected need and the message sequence number received in the next frame is greater than the set restart value, the channel will automatically restart; The frame type is used to describe the type of the frame message; the frame purpose is used to describe the purpose of the frame message; the content of the data information is the information contained in the data message.

4. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 3, characterized in that: The frame types include fixed value negotiation 00H, total data response 01H, total data response end 02H, telemetry data 03H, telesignaling data 04H, remote control 05H, set point 06H and energy data 07H.

5. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 4, characterized in that: The frame purpose includes: total data telemetry uploading 00H, total data telesignal uploading 01H, fixed value data uploading 02H, request 03H, request permission 04H, execution 05H, execution confirmation 06H, execution success 07H, electricity data uploading 08H, telemetry change uploading 09H and telesignal change uploading 0AH.

6. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 5, characterized in that: The data master station verifies the data message including: measuring the current range of -1.1Ie to +1.1Ie, in units of A / kA; the voltage range of 0 to Ue+20, in units of V / kV; the power factor range of 0 to 1, the power range of -1.5Pe to +1.5Pe, in units of W, kW, MW; and the frequency range of 45 to 55Hz.

7. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 6, characterized in that: The data substation interacts with the data master station, including: When the channel is first established, the data master station sends a communication fixed value negotiation message, and the data slave station replies with a fixed value negotiation confirmation message; The data substation sends a data message for fixed value negotiation, and the data master station replies with a data confirmation message for fixed value negotiation; The data substation sends a full data message, and the data master station replies with a full data message confirmation; The data substation sends a business data message, and the data master station replies with a business data confirmation message; The data master station sends a remote control operation request message, and the data slave station replies with a remote control permission message; The data master station sends a remote control execution message, and the data slave station replies with a remote control execution confirmation message; The data substation replies with a message indicating successful remote control execution; The data master station sends a point setting request message, and the data slave station replies with a point setting permission message; The data master station sends a set point execution message, and the data substation replies with a set point execution confirmation message; The data substation replies with a message indicating that the setting point has been successfully executed.

8. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 7, characterized in that: The data master station sends a remote control operation request message, and the data substation replies with a remote control permission message, including: the data master station sends a remote control request message, wherein the frame type is 05H and the frame destination is 03H; the data substation replies with a remote control permission message, wherein the frame destination is 04H; The data master station sends a remote control execution message, and the data substation replies with a remote control execution confirmation message, including: the data master station sends a remote control execution message with a frame destination of 05H, and the data substation replies with an execution confirmation message of 06H and an execution success message of 07H in sequence.

9. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 8, characterized in that: The point setting operation process includes: the master station sends a point setting request message, where the frame type is 06H and the frame destination is 03H; the data substation replies with a point setting permission message, where the frame destination is 04H; the data master station sends a point setting execution message, where the frame destination is 05H, and the substation replies with an execution confirmation message 06H and an execution success message 07H in sequence.

10. The high fault-tolerance dispatching remote transmission network communication method for a power system according to claim 9, characterized in that: The determination of whether to trigger a channel restart is based on the relationship between the sequence number difference between the data master station and the data substation and a preset threshold. Specifically, each time the data master station and the data substation send a frame of message, the sequence number is automatically increased by 1H; the sending sequence number in the receiving party's message is the previous frame sequence number plus 1H. If the difference with the actual receiving sequence number exceeds the set threshold, a channel restart is triggered.

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