An improved method, system and medium for improving reliability of wireless communication of power distribution terminals

Abstract

The application discloses an improved method, system and medium for improving the reliability of wireless communication of a power distribution terminal. The method comprises: stopping the main station from sending services such as total calling, time, heartbeat, request link state and link test during remote control operation, and resuming the process after the remote control process is completed; adding remote control conditions for local discrimination by the power distribution terminal; extending the discrimination duration of communication timeout; and sending burst remote signaling and burst remote measurement messages occurring within a cycle time by separate packaging in units of cycle time, thereby improving information transmission efficiency. The application is dedicated to low signal areas and is compatible with IEC60870-101 protocol, and solves the low remote control success rate caused by hardware problems by using software modification; the terminal discriminates remote control conditions when the main station performs remote control operation, and effectively solves the remote control failure problem by adding a put-off constant value.

Description

Technical Field

[0001] This invention belongs to the technical field of power distribution terminal communication, and specifically relates to an improved method, system and medium for improving the reliability of wireless communication in power distribution terminals. Background Technology

[0002] Remote control devices (DCS, remote telemetry, and remote remote sensing) have been widely used in power systems. With the increasing number of these devices, the success rate of remote control has become a growing concern. This is especially true in areas with weak wireless signals, characterized by increased communication latency, high packet loss rates, and high bit error rates. The problem of low remote control success rates is particularly prominent in these areas.

[0003] Currently, some terminals using wireless communication or with poor communication signals often experience remote control failures due to communication issues. The communication anomaly mechanism caused by increased latency, high packet loss rate, and high bit error rate in the aforementioned areas is as follows: the remote control selection data frames transmitted and received between the master station and the terminal cannot arrive on time, or there are errors or even direct loss of data frames during transmission and reception, causing the remote control initiated by the master station to time out. Summary of the Invention

[0004] The main objective of this invention is to provide an improved method, system, and medium for improving the reliability of wireless communication in power distribution terminals, addressing the current issues of remote control failure caused by weak wireless signals, increased communication delays, high packet loss rates, and high bit error rates in some areas. This invention aims to significantly reduce remote control failures at low cost without requiring adjustments to the equipment hardware.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] One aspect of the present invention provides an improved method for enhancing the reliability of wireless communication in power distribution terminals, comprising the following steps:

[0007] During remote control operations, the main station suspends the internal service processes for total call, time synchronization, heartbeat, request link status, and link testing. These processes are resumed after the remote control process ends.

[0008] The power distribution terminal adds local determination of remote control conditions;

[0009] Extend the timeout detection period for communication;

[0010] By using a time cycle as a unit, sudden remote signaling and sudden telemetry messages occurring within the cycle are packaged and sent separately to improve information transmission efficiency.

[0011] As a preferred technical solution, the remote control operation specifically includes:

[0012] The process begins when the master station issues a remote control selection command and continues until the master station replies with a confirmation frame confirming the end of remote control execution, or the master station sends a remote control cancellation message, or the master station's remote control timeout occurs.

[0013] As a preferred technical solution, the terminal adds on-site remote control condition determination, specifically, the power distribution terminal makes on-site software determinations when receiving switch operation commands, including the following requirements:

[0014] Determine whether the grounding switch has been closed during the closed position. If so, do not receive switch operation commands.

[0015] Determine if the load exceeds the set value; if so, prohibit the tripping operation.

[0016] When remotely operating the switch, the IP address of the controlled device must be checked and the operating device must have a dedicated network encryption key.

[0017] Determine if the equipment is energized; if so, do not close the grounding switch.

[0018] Remote control is prohibited when personnel operation is detected. When the switch in the open / close position is selected to open or close and when the open / close command is executed, the remote control is replied to from the master station and the execution is rejected.

[0019] When a low air pressure alarm occurs, the interlock switch will be operated.

[0020] When closing the switch, the closing conditions are determined as follows: closing is allowed when there is no voltage on both sides or no voltage on one side. When there is voltage on both sides, closing is only allowed after the voltage synchronization condition on both sides is met.

[0021] As a preferred technical solution, the extended timeout determination period is specifically as follows:

[0022] Improve the receiving terminal software to provide a message timeout judgment time setting value, and adjust the timeout judgment value according to the communication signal.

[0023] As a preferred technical solution, the specific steps of packaging and sending burst messages are as follows:

[0024] When a large number of COS, SOE, and change telemetry messages occur, they are packaged and sent up; the earlier events are placed in the low byte and the later events are placed in the high byte.

[0025] As a preferred technical solution, the terminal sets the delay for event transmission based on the regional signal strength, and transmits the current burst message in the buffer once every set time interval.

[0026] As a preferred technical solution, it also includes adding a setpoint for switching on and off, specifically: adjusting the setpoint when the terminal signal strength changes.

[0027] As a preferred technical solution, the message retransmission mechanism, short acknowledgment frame transmission mechanism, and remote control lifecycle mechanism during remote control are implemented in accordance with the IEC 60870 specification.

[0028] Another aspect of the present invention provides an improved system for enhancing the reliability of wireless communication in power distribution terminals, applied to the aforementioned improved method for enhancing the reliability of wireless communication in power distribution terminals, comprising an internal process prohibition module, a remote control discrimination module, a communication discrimination delay module, and a burst information packaging module;

[0029] The internal process blocking module is used to stop the service internal processes of total call, time synchronization, heartbeat, request link status and link test during remote operation. The processes are restored after the remote operation ends.

[0030] The remote control discrimination module is used to add remote control conditions to the power distribution terminal for local discrimination;

[0031] The communication discrimination delay module is used to extend the discrimination time for communication timeout;

[0032] The burst information packaging module is used to package and send burst remote signaling and burst telemetry messages that occur within a period of time, thereby improving information transmission efficiency.

[0033] In another aspect, the present invention provides a storage medium storing a program that, when executed by a processor, implements the above-described improved method for enhancing the reliability of wireless communication in a power distribution terminal.

[0034] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0035] (1) This application solves the low remote control success rate caused by hardware problems by using software modifications;

[0036] (2) This application adds a setting for enabling / disabling, specifically for solving the problem of low remote control success rate in areas with low signal;

[0037] (3) The improved method proposed in this application is a new communication standard, which is specifically designed for areas with low signal and is compatible with the IEC60870-101 protocol;

[0038] (4) The terminal of this application performs remote control condition judgment when performing remote control operation at the main station, which can effectively solve the problem of remote control failure. Attached Figure Description

[0039] Figure 1 This is a flowchart of an improved method for improving the reliability of wireless communication in power distribution terminals according to an embodiment of the present invention;

[0040] Figure 2 This is a comparison diagram showing the effects before and after an improvement of a method for improving the reliability of wireless communication in a power distribution terminal according to an embodiment of the present invention.

[0041] Figure 3This is a schematic diagram of the structure of an improved system for enhancing the reliability of wireless communication in power distribution terminals according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of the storage medium according to an embodiment of the present invention. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0044] Example

[0045] like Figure 1 , Figure 2 As shown, this embodiment provides an improved method for enhancing the reliability of wireless communication in power distribution terminals, specifically including:

[0046] 1. Modify the power distribution master station;

[0047] (1) During the remote control period, the master station stops sending commands that are not part of this remote control service, such as general call, time synchronization heartbeat, and link test. The remote control operation period refers to the period from when the master station sends the remote control selection command to when the master station replies to the terminal with a remote control execution completion confirmation frame, or when the master station sends a remote control cancellation message, or when the master station's remote control timeout occurs.

[0048] During remote control, the terminal will stop sending commands such as COS and SOE that are not part of this remote control service.

[0049] (2) Extend the timeout judgment period. This prevents remote control failure due to delayed data retransmission when data transmission errors occur during remote control. Improve the receiving terminal software to provide a message timeout judgment time setting value and adjust the timeout judgment value according to the communication signal.

[0050] II. Modify the power distribution terminal;

[0051] (3) The terminal should add on-site remote control condition judgment. Due to the low real-time communication capability, the master station cannot synchronize terminal information in real time. Therefore, the terminal should perform remote control condition judgment when performing remote control operations at the master station. The switch operation should consider the five protection requirements on-site, as follows:

[0052] (a) Determine if the grounding switch is in the closed position. If so, the closing operation cannot be performed.

[0053] (b) The rationality of the operation should be considered. Remote control should be prohibited when personnel operation is detected. For example, when a switch in the open (close) position is selected or executed, the remote control selection (execution) should be rejected by the master station.

[0054] (c) When remotely operating the switch, determine the IP address of the control device and ensure that the operating device has a dedicated network encryption key;

[0055] (d) When a low air pressure alarm occurs, the switch operation should be locked;

[0056] (e) When tripping a load switch, the load current should be less than the switch's interrupting current. Determine if the load exceeds the set value; if so, tripping is prohibited.

[0057] (f) Determine if the equipment is energized; if so, do not close the grounding switch.

[0058] (g) In addition, the closing conditions may be determined as appropriate: closing is allowed when there is no voltage on both sides or no voltage on one side; when there is voltage on both sides, closing is allowed only after the voltage synchronization conditions on both sides are met.

[0059] (4) Pack and send sudden messages.

[0060] To prevent burst messages from consuming wireless bandwidth, it is advisable to package and send a large number of COS, SOE, and changing telemetry messages. The order should be: earlier events in the low byte and later events in the high byte, so the master station can track the order of events. To adapt to communication in areas with weak signals, the terminal should set an event delay before sending. In general areas, this value can be set to 0, allowing for rapid packet packaging and transmission based on the terminal's processing speed. In areas with poor signal, the delay should be set to other values, such as 1 second or 2 seconds, sending the current burst of messages in the buffer once every set time interval.

[0061] III. Other issues.

[0062] (5) The inherent requirements for message retransmission mechanisms, short acknowledgment frame transmission, and remote control lifecycle during remote control shall still be implemented in accordance with the IEC 60870 specification. Special functions developed to adapt to poor communication signals include added enable / disable settings, which are adjusted and switched when the terminal signal strength changes. For example... Figure 3 As shown, in another embodiment of this application, an improved system for enhancing the reliability of wireless communication in power distribution terminals is provided. The system includes an internal process blocking module, a remote control discrimination module, a communication discrimination delay module, and a burst information packaging module.

[0063] The internal process blocking module is used to stop the service internal processes of total call, time synchronization, heartbeat, request link status and link test during remote operation. The processes are restored after the remote operation ends.

[0064] The remote control discrimination module is used to add remote control conditions to the power distribution terminal for local discrimination;

[0065] The communication discrimination delay module is used to extend the discrimination time for communication timeout;

[0066] The burst information packaging module is used to package and send burst remote signaling and burst telemetry messages that occur within a period of time, thereby improving information transmission efficiency.

[0067] It should be noted that the system provided in the above embodiments is only an example of the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure can be divided into different functional modules to complete all or part of the functions described above. This system is an improved method for improving the reliability of wireless communication of power distribution terminals applied to the above embodiments.

[0068] like Figure 4 As shown, in another embodiment of this application, a storage medium is also provided, storing a program that, when executed by a processor, implements an improved method for enhancing the reliability of wireless communication in a power distribution terminal, specifically:

[0069] During remote control operations, the main station suspends the internal service processes for total call, time synchronization, heartbeat, request link status, and link testing. These processes are resumed after the remote control process ends.

[0070] The power distribution terminal adds local determination of remote control conditions;

[0071] Extend the timeout detection period for communication;

[0072] By using a time cycle as a unit, sudden remote signaling and sudden telemetry messages occurring within the cycle are packaged and sent separately to improve information transmission efficiency.

[0073] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0074] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An improved method for enhancing the reliability of wireless communication in power distribution terminals, characterized in that, Includes the following steps: During remote control operations, the main station suspends the internal service processes for total call, time synchronization, heartbeat, request link status, and link testing. These processes are resumed after the remote control process ends. The power distribution terminal adds local judgment of remote control conditions. Specifically, the power distribution terminal makes local software judgments when receiving switch operation commands, including the following requirements: Determine if the grounding switch is in the correct position; if so, do not perform the closing operation. Determine if the load exceeds the set value; if so, prohibit the tripping operation. When remotely operating the switch, the IP address of the controlled device must be checked and the operating device must have a dedicated network encryption key. Determine if the equipment is energized; if so, do not close the grounding switch. Remote control is prohibited when personnel operation is detected. When the switch in the open / close position is selected to open or close and when the open / close command is executed, the remote control is replied to from the master station and the execution is rejected. When a low air pressure alarm occurs, the interlock switch will be operated. When closing the switch, the closing conditions are determined as follows: closing is allowed when there is no voltage on both sides or no voltage on one side; when there is voltage on both sides, closing is only allowed after the voltage synchronization condition on both sides is met. Extend the timeout detection period for communication; By using a cycle time as a unit, sudden remote signaling and sudden telemetry messages that occur within the cycle time are packaged and sent separately to improve information transmission efficiency; Add a setting value for enabling / disabling the terminal signal strength; specifically, adjust the setting value and switch when the terminal signal strength changes. The remote control message retransmission mechanism, short acknowledgment frame transmission mechanism, and remote control lifecycle mechanism are implemented in accordance with the IEC 60870 specification.

2. The improved method for enhancing the reliability of wireless communication in power distribution terminals according to claim 1, characterized in that, The remote control operation specifically refers to the following: The process begins when the master station issues a remote control selection command and continues until the master station replies with a confirmation frame confirming the end of remote control execution, or the master station sends a remote control cancellation message, or the master station's remote control timeout occurs.

3. The improved method for enhancing the reliability of wireless communication in power distribution terminals according to claim 1, characterized in that, The extended timeout determination duration is specifically as follows: Improve the receiving terminal software to provide a message timeout judgment time setting value, and adjust the timeout judgment value according to the communication signal.

4. The improved method for enhancing the reliability of wireless communication in power distribution terminals according to claim 1, characterized in that, The specific steps for packaging and sending burst messages are as follows: When a large number of COS, SOE, and change telemetry messages occur, they are packaged and sent up; the earlier events are placed in the low byte and the later events are placed in the high byte.

5. An improved method for enhancing the reliability of wireless communication in a power distribution terminal according to claim 4, characterized in that, The terminal sets the delay for event transmission based on the regional signal strength, and transmits the current burst messages in the buffer once every set time interval.

6. An improved system for enhancing the reliability of wireless communication in power distribution terminals, characterized in that, An improved method for improving the reliability of wireless communication of a power distribution terminal, applicable to any one of claims 1-5, includes an internal process prohibition module, a remote control discrimination module, a communication discrimination delay module, and a burst information packaging module; The internal process blocking module is used to stop the service internal processes of total call, time synchronization, heartbeat, request link status and link test during remote operation. The processes are restored after the remote operation ends. The remote control discrimination module is used to add remote control conditions to the power distribution terminal for local discrimination; The communication discrimination delay module is used to extend the discrimination time for communication timeout; The burst information packaging module is used to package and send burst remote signaling and burst telemetry messages that occur within a period of time, thereby improving information transmission efficiency.

7. A storage medium storing a program, characterized in that: When the program is executed by the processor, it implements the improved method for improving the reliability of wireless communication in power distribution terminals as described in any one of claims 1-5.

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