A method and system for wireless operation and maintenance of a feeder terminal based on PNP self-negotiation

Abstract

The application discloses a kind of based on PNP self-negotiation's feeder terminal wireless operation and maintenance method and system, comprising: wireless access point adaptive opening is carried out, so that feeder terminal opens a period in fixed interval, according to the time and duration of last wireless operation and maintenance real-time adjustment is carried out;Establish self-negotiation interaction model, when wireless operation and maintenance tool connects terminal and establishes wireless channel during the opening period of feeder terminal wireless access point, both sides carry out self-negotiation interaction, complete the reading of equipment parameter;Self-negotiation interaction is carried out, wireless operation and maintenance tool searches access point, establishes wireless channel, carries out identity authentication and parameter verification, opens operation and maintenance function after success, if no message of operation and maintenance tool is received or continuously sent message is not answered in operation and maintenance process, then exit operation and maintenance and search feeder terminal access point again.The application solves the problem of on-site feeder terminal pole climbing operation and maintenance by local wireless operation and maintenance mode, improves feeder terminal operation and maintenance efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power system operation and maintenance and wireless communication technology, in particular to a feeder terminal wireless operation and maintenance method and system based on PNP self-negotiation. BACKGROUND

[0002] The feeder terminal is a power secondary monitoring device installed on an overhead line, which has remote control, remote measurement, remote signaling and fault detection functions, and can communicate with the distribution automation master station to provide the operation of the distribution system and various parameters required for monitoring and control information. At present, the feeder terminal operation and maintenance business efficiency is not high, and in the value modification, terminal program upgrade, professional inspection, switch local operation, fault information viewing and other operation and maintenance business scenarios, the operation and maintenance personnel need to climb the ladder and operate, and the operation and maintenance is carried out through wired mode, which has safety hazards and low efficiency. Wireless communication mode can reduce the difficulty of feeder terminal field operation and maintenance, but the safety of wireless communication operation and maintenance in the power industry has higher requirements, and due to the particularity of wireless communication, the operator needs to know the ID of the terminal wireless access point in advance, otherwise the wireless channel cannot be established for operation and maintenance.

[0003] The present application proposes a wireless operation and maintenance method based on PNP self-negotiation technology, the feeder terminal adaptively opens the wireless access point according to the wireless connection state, the wireless operation and maintenance tool periodically searches the current wireless access point, the wireless operation and maintenance tool performs self-negotiation interaction after establishing the wireless communication channel, obtains all the feeder terminal access point parameters that can be operated and establishes the operable terminal table, the operation and maintenance personnel select the feeder terminal to be maintained for local wireless operation and maintenance operation, and the wireless operation and maintenance tool performs handshake connection with the selected feeder terminal according to the operable terminal table parameters, so as to realize the operation and maintenance channel self-negotiation of the feeder terminal, which not only ensures the safety of wireless communication operation and maintenance, but also simplifies the operation and maintenance operation of the feeder terminal on site, and the wireless operation and maintenance channel of the feeder terminal can be established without manual intervention. SUMMARY

[0004] In view of the above problems, the present application is proposed.

[0005] Therefore, the technical problem solved by the present application is that the existing feeder terminal operation and maintenance method needs operation and maintenance personnel to climb the ladder and operate in wired mode, which has safety hazards and low efficiency. Wireless communication mode can reduce the difficulty of field operation and maintenance, but due to the high safety requirements of wireless communication operation and maintenance in the power industry, the ID of the terminal wireless access point needs to be known in advance, otherwise the wireless channel cannot be established for operation and maintenance.

[0006] To solve the above technical problems, the present application provides the following technical solutions: a wireless operation and maintenance method for feeder terminal based on PNP self-negotiation, comprising: wireless access point self-adaptive opening, so that the feeder terminal opens for a period in a fixed interval, and real-time adjustment according to the time and duration of the last wireless operation and maintenance;

[0007] Establishing a self-negotiation interaction model, during the opening period of the wireless access point of the feeder terminal, after the wireless operation and maintenance tool connects the terminal and establishes a wireless channel, the two parties perform self-negotiation interaction to complete reading of device parameters;

[0008] Performing self-negotiation interaction, the wireless operation and maintenance tool searches for an access point, establishes a wireless channel, performs identity authentication and parameter verification, and opens the operation and maintenance function after success, and exits the operation and maintenance and searches for the feeder terminal access point again if no message of the operation and maintenance tool is received or no response is received after continuous sending of messages during the operation and maintenance.

[0009] The wireless access point self-adaptive opening comprises that the terminal opens for a period t0 in a fixed interval T0 by default setting, and closes the wireless access point in (T0-t0) time;

[0010] In the hotspot period opening, the parameters T0 and t0 are real-time corrected according to the time of the last wireless operation and maintenance and the time occupied by the last wireless operation and maintenance;

[0011] The terminal real-time records the time T last of the last operation and maintenance, and the relationship is represented as:

[0012] T1=T cur -T last

[0013] Wherein, T1 represents the time of the current time from the last wireless operation and maintenance; T cur represents the current time, and T last represents the time of the last wireless operation and maintenance;

[0014] When T1≤0, the wireless access point is in an open state in the current operation and maintenance state;

[0015] When T l >0, the wireless access point is in a closed state without the operation and maintenance terminal access.

[0016] The wireless access point self-adaptive opening further comprises that the corrected wireless access point opening time interval is represented as:

[0017]

[0018] Wherein, T0' represents the corrected wireless access point opening time interval;

[0019] The negotiation time between the feeder terminal and the wireless operation and maintenance tool is the response time of the feeder terminal operation and maintenance, and the disconnection time between the feeder terminal and the wireless operation and maintenance tool is the end time of the operation and maintenance;

[0020] The feeder terminal actively records the response time of the last wireless operation and maintenance and the end time of the wireless operation and maintenance, and sets the last wireless operation period as t last , which is expressed as:

[0021] t last = t respond-last -t final-last

[0022] Wherein, t last represents the period of the last wireless operation, that is, the occupation time of the last wireless operation; t respond-last represents the response time of the last wireless operation; t final-last represents the end time of the last wireless operation.

[0023] The corrected wireless access point opening time window is calculated, and the formula is:

[0024]

[0025] Wherein, T win represents the opening time window; k represents a coefficient, which can be defined according to engineering application conditions.

[0026] As a preferred scheme of the feeder terminal wireless operation and maintenance method based on PNP self-negotiation, the self-negotiation interaction model includes a self-negotiation interaction authentication model and a feeder terminal parameter model.

[0027] The self-negotiation interaction authentication parameters include a device ID, a registration identifier, a self-negotiation model feature code and an encrypted identity authentication code.

[0028] The feeder terminal parameters include a feeder terminal ID, a feeder terminal name and a feeder terminal SIM card IP.

[0029] The SM2 encryption algorithm is used on both sides of the encrypted identity authentication code to realize the identity bidirectional authentication of the terminal and the operation and maintenance tool.

[0030] As a preferred scheme of the feeder terminal wireless operation and maintenance method based on PNP self-negotiation, the self-negotiation interaction includes that the wireless operation and maintenance tool searches for wireless open access points in the current range, and if multiple feeder terminal access points are searched, the wireless operation and maintenance terminal establishes a wireless channel with the terminal one by one.

[0031] When the wireless operation and maintenance terminal establishes a wireless channel with the feeder terminal, the wireless operation and maintenance terminal sends a self-registration message, and at this time, the identity authentication code is empty.

[0032] As a preferred scheme of the PNP self-negotiation based feeder terminal wireless operation and maintenance method, the self-negotiation interaction further includes that the feeder terminal sends a negotiation message with an encrypted identity authentication code after receiving the self-registration message.

[0033] The feeder terminal signs the unique identification parameter by using an SM2 national encryption algorithm, and the result is the generated terminal identity authentication code.

[0034] After receiving the negotiation message, the wireless operation and maintenance tool verifies the received identity authentication code, and after the signature verification is successful, the operation and maintenance tool signs the unique identification parameter of the feeder terminal by using the SM2 national encryption algorithm, the signature result is the corresponding identity authentication code, and the operation and maintenance tool fills the identity authentication code into the reply negotiation message.

[0035] The feeder terminal opens the operation and maintenance operation function after the identity authentication code decryption is passed.

[0036] As a preferred scheme of the PNP self-negotiation based feeder terminal wireless operation and maintenance method, the self-negotiation interaction further includes that the feeder terminal identity authentication fails, the wireless channel is closed after a delay of 10 seconds after the authentication fails, and the feeder terminal reenters the sleep state.

[0037] After the wireless operation and maintenance tool ends the operation and maintenance operation, an end operation and maintenance operation message is sent to the feeder terminal.

[0038] After receiving the end message, the feeder terminal closes the operation and maintenance operation function and closes the wireless open access point.

[0039] If the feeder terminal does not receive the message sent by the wireless operation and maintenance tool within 30 seconds during the operation and maintenance process, it is considered that the communication is interrupted, the connection is closed, the wireless channel is closed after a delay of 10 seconds, and the feeder terminal reenters the sleep state.

[0040] During the operation and maintenance process, the operation and maintenance tool can resend the message 3 times when connecting with the terminal, if the terminal does not reply after resending 3 times, the operation and maintenance tool immediately establishes a connection with the terminal again, if the connection cannot be established, the operation and maintenance tool exits the operation and maintenance and searches for the feeder terminal access point again.

[0041] A PNP self-negotiation based feeder terminal wireless operation and maintenance system, characterized in that it comprises,

[0042] The wireless access point adaptive opening module opens the wireless access point adaptively, so that the feeder terminal opens a period in a fixed interval, and adjusts the period in real time according to the time and duration of the last wireless operation and maintenance.

[0043] Self-negotiation interaction model establishing module: a self-negotiation interaction model is established, during the opening period of the feeder terminal wireless access point, after the wireless operation and maintenance tool connects the terminal and establishes a wireless channel, the both sides perform self-negotiation interaction, and reading of device parameters is completed;

[0044] Self-negotiation interaction module: self-negotiation interaction is performed, the wireless operation and maintenance tool searches for an access point, establishes a wireless channel, performs identity authentication and parameter verification, and after success, operation and maintenance functions are opened, and if no message of the operation and maintenance tool is received or the message is continuously sent without response in the operation and maintenance process, the operation and maintenance is exited and the feeder terminal access point is searched again.

[0045] The present application has the following beneficial effects: the present application solves the problem of on-site feeder terminal pole climbing operation and maintenance by means of local wireless operation and maintenance, and improves the feeder terminal operation and maintenance efficiency. Since complex parameter setting is required for wireless channel establishment, the present application reduces the operation of on-site operation and maintenance personnel by self-negotiation interaction, and the operation and maintenance channel is established by the operation and maintenance tool and the feeder terminal. The self-negotiation interaction self-brought identity authentication encryption ensures the safety of wireless operation and maintenance. The self-adaptive opening of the feeder terminal wireless access point reduces the power consumption of the feeder terminal caused by wireless operation and maintenance, and reduces the interference of external other wireless devices. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0047] Fig. 1 A flow chart of a feeder terminal wireless operation and maintenance method based on PNP self-negotiation is provided for the first embodiment of the present application;

[0048] Fig. 2 A feeder terminal wireless operation and maintenance overall flow chart of a feeder terminal wireless operation and maintenance method based on PNP self-negotiation is provided for the first embodiment of the present application;

[0049] Fig. 3 A wireless operation and maintenance flow chart of a wireless operation and maintenance tool of a feeder terminal wireless operation and maintenance method based on PNP self-negotiation is provided for the first embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0051] Embodiment 1

[0052] Reference Figs. 1-3 For an embodiment of the present application, a wireless operation and maintenance method based on PNP self-negotiation of a feeder terminal is provided, comprising:

[0053] S1: wireless access point self-adaptive opening is performed, so that the feeder terminal opens a period within a fixed interval, and real-time adjustment is performed according to the time and duration of the last wireless operation and maintenance;

[0054] The PNP is Plug and Play, that is, plug and play. After the terminal accesses the network, it can automatically access the network to complete configuration and deployment without manual configuration.

[0055] In order to ensure safety and terminal running power consumption, in order to reduce the power consumption of the wireless access point during the running of the feeder terminal, the terminal selects a period opening mode, and the terminal is set to open a period t0 within a fixed interval T0 by default, and the wireless access point is closed within (T0-t0) time. At this time, the operation and maintenance tool cannot access the terminal, and the power consumption can be reduced to compared with the always-on mode. Since it is a fixed interval, the time for the operation and maintenance tool to access the terminal will be prolonged, and the experience is slightly worse than that of the always-on mode. Therefore, on the basis of the hot spot period opening mode, the time of the last wireless operation and maintenance and the time occupied by the last wireless operation and maintenance are used to adaptively calculate and real-time correct the parameters of T0 and t0.

[0056] The terminal records the last operation and maintenance time T last , and the relationship is represented as:

[0057] T1=T cur -T last

[0058] Among them, T1 represents the time from the current time to the last wireless operation and maintenance; T cur represents the current time, and T last represents the last wireless operation and maintenance time.

[0059] When T1≤0, the wireless access point is in an open state under the current operation and maintenance state.

[0060] When T l >0, the wireless access point is in a closed state without terminal access.

[0061] The modified wireless access point open time interval is represented as:

[0062]

[0063] wherein T0' represents the modified wireless access point open time interval;

[0064] The start negotiation time of the feeder terminal and the wireless operation and maintenance tool is the feeder terminal operation and maintenance response time, and the disconnection time of the feeder terminal and the wireless operation and maintenance tool is the operation and maintenance end time. The feeder terminal actively records the response time and the wireless operation and maintenance end time of the last wireless operation and maintenance, and sets the last wireless operation and maintenance cycle as t last , which is represented as:

[0065] t last = t respond-last -t final-last

[0066] wherein t last represents the cycle of the last wireless operation and maintenance, i.e. the occupation time of the last wireless operation and maintenance; t respond-last represents the response time of the last wireless operation and maintenance; and t final-last represents the wireless operation and maintenance end time.

[0067] The modified wireless access point open time window is calculated, and the formula is:

[0068]

[0069] wherein T win represents the open time window; and k represents a coefficient, which can be self-defined according to engineering application conditions.

[0070] It should be noted that by adaptively adjusting the open time and interval of the wireless access point, the operation and maintenance personnel can quickly access the terminal when needed, reduce the waiting time, and improve the operation and maintenance efficiency. By adopting the periodic open mode, the wireless access point is closed when it is not needed to be operated and maintained, which greatly reduces the power consumption. Compared with the always-on mode, the power consumption is significantly reduced, and the service life of the equipment is prolonged. While ensuring the operation and maintenance function, the long-term opening of the wireless access point is avoided, the risk of being illegally accessed is reduced, and the security of the system is improved.

[0071] S2: Establish a self-negotiation interaction model. During the open period of the feeder terminal wireless access point, when the wireless operation and maintenance tool connects the terminal and establishes a wireless channel, the two parties perform self-negotiation interaction to complete the reading of the device parameters;

[0072] The self-negotiation interaction model includes a self-negotiation interaction authentication model and a feeder terminal parameter model.

[0073] Self-negotiation interaction authentication parameters: including device ID, registration identification, self-negotiation model feature code and encrypted identity authentication code. Device ID and registration identification ensure the uniqueness and legality of device identity; self-negotiation model feature code describes the interaction characteristics, ensuring the accuracy of interaction; encrypted identity authentication code uses SM2 encryption algorithm to realize two-way identity authentication, preventing illegal device access.

[0074] Device ID: uniquely identifies each feeder terminal, ensuring accurate positioning of specific devices during self-negotiation interaction. The beneficial effects of this are that even if there are multiple terminals, the operation and maintenance tool can accurately identify and connect the target device, avoiding confusion and errors.

[0075] Registration identification: identifies the registration status of the device, ensuring that only registered devices can participate in self-negotiation interaction. This design effectively prevents unauthorized device access, enhancing system security and stability.

[0076] Self-negotiation model feature code: used to describe the self-negotiation interaction characteristics of the device, ensuring that both parties can correctly parse and process interaction information during interaction. The use of this feature code makes the self-negotiation process more flexible and adaptable, allowing for customized processing based on the characteristics of different devices.

[0077] Encrypted identity authentication code: uses SM2 encryption algorithm for two-way identity authentication, ensuring the legality of the identity of both parties in the interaction, preventing illegal device access. Two-way authentication not only improves security, but also ensures the integrity and confidentiality of data transmission.

[0078] Feeder terminal parameters: including feeder terminal ID, feeder terminal name and feeder terminal SIM card IP. These parameters ensure that the operation and maintenance tool can accurately identify and manage each terminal when establishing a connection and interacting with the feeder terminal.

[0079] Feeder terminal ID: uniquely identifies the feeder terminal, ensuring accurate positioning of specific devices during self-negotiation interaction. The advantage is that the operation and maintenance tool can accurately identify and manage multiple terminals, reducing the likelihood of errors.

[0080] Feeder terminal name: provides device name information for easy identification and management. The use of name information allows operation and maintenance personnel to more intuitively identify devices, reducing the time for searching and confirming and improving work efficiency.

[0081] Feeder terminal SIM card IP: used for device communication IP address, ensuring correct connection establishment during wireless communication. The advantage is that it ensures the stability and connectivity of data transmission, avoiding connection problems caused by IP address confusion.

[0082] S3: Self-negotiation interaction is performed, the wireless operation and maintenance tool searches for an access point, a wireless channel is established, identity authentication and parameter verification are performed, the operation and maintenance function is opened after success, and the operation and maintenance function is exited and the feeder terminal access point is searched again if no message of the operation and maintenance tool is received or the message of the operation and maintenance tool is continuously sent without response in the operation and maintenance process. Refer to Fig. 2 .

[0083] The wireless operation and maintenance tool searches for a wireless open access point in a current range, and if multiple feeder terminal access points are searched, the wireless operation and maintenance terminal establishes a wireless channel with the terminal one by one. This process ensures that the operation and maintenance tool can find and connect to the correct access point in the shortest time, and improves the operation and maintenance efficiency. Refer to Fig. 3 .

[0084] When the wireless operation and maintenance terminal establishes a wireless channel with the feeder terminal, the wireless operation and maintenance terminal sends a self-registration message, and at this time, the identity authentication code is empty.

[0085] The feeder terminal sends a negotiation message with an encrypted identity authentication code after receiving the self-registration message. The feeder terminal signs the unique identification parameters (terminal IP, terminal ID, terminal MAC) through the SM2 national secret algorithm, and the result obtained is the generated terminal identity authentication code.

[0086] The wireless operation and maintenance tool verifies the received identity authentication code after receiving the negotiation message, and after the signature verification is successful; the operation and maintenance tool signs the unique identification parameters (terminal IP, terminal ID, terminal MAC) of the feeder terminal through the SM2 national secret algorithm, and the signature result obtains the corresponding identity authentication code. The tool fills the identity authentication code into the reply negotiation message.

[0087] The feeder terminal opens the operation and maintenance operation function after the identity authentication code decryption is passed.

[0088] If the feeder terminal identity authentication fails, the wireless channel is closed with a delay of 10s, and the feeder terminal enters the sleep state again.

[0089] The wireless operation and maintenance tool sends an end operation message to the feeder terminal after the operation and maintenance operation is completed.

[0090] The feeder terminal closes the operation and maintenance operation function and closes the wireless open access point after receiving the end message.

[0091] If the feeder terminal does not receive the message sent by the wireless operation and maintenance tool within 30s in the operation and maintenance process, it is considered that the communication is interrupted, the connection is closed, the wireless channel is closed with a delay of 10s, and the feeder terminal enters the sleep state again.

[0092] It should be noted that the 30-second time window is long enough to cover short-term network fluctuations and disturbances, avoiding unnecessary maintenance interruptions caused by transient signal instability. During the maintenance process, a certain amount of time is needed for data transmission and operation, and the absence of messages within 30 seconds may indicate a connection problem that requires re-establishment. According to actual maintenance experience, a 30-second time window can effectively balance response speed and network stability, ensuring that the system can take timely measures when communication is interrupted. A 10-second delay shutdown can prevent frequent switching operations, saving energy while avoiding frequent reconnections caused by short-term signal recovery. A 10-second buffer time allows maintenance tools to quickly reconnect after a brief signal interruption, reducing unnecessary re-search and connection operations. A 10-second time window has proven to be effective in preventing frequent switching operations in actual maintenance, maintaining system stability.

[0093] During the maintenance process, the maintenance tool can resend the application message three times when connecting with the terminal. If no reply is received from the terminal after three retransmissions, the tool will immediately establish a connection with the terminal again. If connection cannot be established, the tool will exit the maintenance process and search for a feeder terminal access point.

[0094] It should be noted that the absence of responses to three consecutive messages may indicate a connection problem that requires re-search and connection establishment. A single or two non-responses may be a short-term network problem, while three non-responses are more reliable indicators of a connection interruption. Setting a threshold of three messages can prevent false positives caused by occasional message loss, ensuring that the system only searches for access points when there is a real communication problem. According to actual maintenance experience, a threshold of three messages can effectively distinguish between short-term communication failures and real connection interruptions, improving system stability.

[0095] In the above embodiments, a feeder terminal wireless maintenance system based on PNP self-negotiation is also included, specifically:

[0096] Data acquisition and preprocessing module: Real-time acquisition and preprocessing of device operation data by deploying edge computing nodes near key equipment in power plants.

[0097] Communication network construction module: Real-time data transmission between edge computing nodes and central monitoring systems using a communication network constructed using 5G base stations and dedicated network slicing technology.

[0098] Predictive maintenance module: Establishes a predictive maintenance model through historical data and machine learning algorithms, deployed on edge computing nodes for real-time data analysis and fault warning.

[0099] Dynamic threshold adjustment module: Dynamically adjusts the threshold for fault warning based on real-time data and historical data;

[0100] Early warning information transmission and fault processing module: transmit early warning information to the central monitoring system in real time through the 5G network, and trigger the corresponding fault processing process.

[0101] The computer device can be a server. The computer device includes a processor, a memory, an input / output interface (I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the data cluster data of the power monitoring system. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with the terminal outside through network connection. The computer program is executed by the processor to implement a PNP self-negotiation based feeder terminal wireless operation and maintenance method.

[0102] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0103] Embodiment 2

[0104] For an embodiment of the present application, a power line terminal wireless operation and maintenance method based on PNP self-negotiation is provided. In order to verify the beneficial effects of the present application, economic benefit calculation and simulation / contrast experiments are used for scientific demonstration.

[0105] To verify the effectiveness of the PNP self-negotiation-based feeder terminal wireless operation and maintenance method of the application, a series of experiments were conducted. The embodiment aims to verify the effectiveness and superiority of the PNP self-negotiation-based feeder terminal wireless operation and maintenance method. The test uses six feeder terminals, all of which are built-in Bluetooth chips, and uses Bluetooth hotspots as the communication mode of wireless operation and maintenance. The main parameters of the test include fixed interval T0, open period t0, power consumption coefficients k1 and k2, and the power consumption and operation and maintenance time of each terminal in different operation and maintenance scenarios are measured.

[0106] Device preparation:

[0107] Six feeder terminals, numbered feeder terminal 1 to feeder terminal 6.

[0108] Configure the Bluetooth hotspot of each terminal, and set the initial power consumption to 100mW.

[0109] The fixed interval T0 is set to 60 seconds, the open period t0 is set to 5 seconds, the power consumption coefficient k1 is set to 2, and the k2 is set to 0.5.

[0110] Initial measurement:

[0111] Record the power consumption of each terminal in the always-on state of the Bluetooth hotspot.

[0112] Set the operation and maintenance mode of the terminal under the default parameters, and record the initial power consumption before the operation and maintenance starts.

[0113] Adaptive open strategy application:

[0114] Start the PNP self-negotiation technology, and the terminal adjusts adaptively according to the time and duration of the last operation and maintenance.

[0115] Each terminal records its last operation and maintenance response time and end time, calculates and adjusts the corrected wireless access point open time interval T`0.

[0116] The open period t0 and the fixed interval T0 are corrected in real time to optimize power consumption and operation and maintenance efficiency.

[0117] Operation and maintenance process:

[0118] The wireless operation and maintenance tool searches for wireless open access points within the current range, and establishes a wireless channel with each terminal one by one.

[0119] Send a self-registration message for identity authentication, and the terminal replies with a negotiation message containing an encrypted identity authentication code. Both parties perform two-way identity verification through the SM2 national secret algorithm.

[0120] After successful verification, the terminal opens the operation and maintenance operation function. After the operation and maintenance tool performs the necessary maintenance operation, it sends an end operation and maintenance operation message.

[0121] If no message is received during operation or consecutive message sending has no response, the system automatically exits the operation and searches for the access point again.

[0122] Data recording and analysis:

[0123] Record the average power consumption of each terminal after multiple operations within 24 hours.

[0124] Statistical analysis of power consumption difference and operation time saving before and after using adaptive open strategy.

[0125] Detailed content can refer to Table 1.

[0126] Table 1 Experimental data reference table

[0127]

[0128] Through the analysis of experimental data, the following conclusions can be drawn:

[0129] Significant reduction in power consumption:

[0130] Before implementing PNP self-negotiation technology, the Bluetooth hotspot of each feeder terminal is always on with a power consumption of 100mW. After using adaptive open strategy, the average power consumption of each terminal is significantly reduced, with the highest reduction to 18mW and the lowest to 22mW, and the average power consumption is about 20mW.

[0131] This reduction in power consumption not only reduces energy consumption, but also prolongs the service life of terminal equipment, with significant energy-saving effect.

[0132] Significant saving of operation time:

[0133] Traditional operation method requires two times of climbing the pole, each time consuming about 30 minutes. After using the wireless operation method of the invention, the average operation time is saved about 30 minutes, with the highest saving of 35 minutes and the lowest saving of 27 minutes.

[0134] This time saving is mainly due to the application of self-negotiation interactive model, which makes the operation personnel no longer need to repeatedly climb the pole operation, and most of the operation tasks can be completed through wireless communication, greatly improving the operation efficiency.

[0135] System reliability is enhanced:

[0136] During operation, the system can automatically handle communication interruption. If no message is received for 30 seconds or no response is received for 3 consecutive messages, the system will automatically exit the operation and search for the access point again. This mechanism effectively avoids operation failure caused by short-term communication interruption, improving the reliability of the system.

[0137] The bidirectional identity authentication and parameter verification are performed through an SM2 national secret algorithm, so as to ensure the communication safety between the operation and maintenance tool and the terminal, and prevent illegal equipment access and data theft.

[0138] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A method for wireless operation and maintenance of a feeder terminal based on PNP self-negotiation, characterized in that, The application comprises the following steps: Adaptive opening of wireless access points is performed, so that the feeder terminal opens for a period in a fixed interval, and the last time and duration of wireless operation and maintenance are used for real-time adjustment; A self-negotiation interaction model is established, and when the wireless operation and maintenance tool connects the terminal and establishes a wireless channel during the opening period of the wireless access point of the feeder terminal, self-negotiation interaction is performed between the two parties to complete reading of device parameters; Self-negotiation interaction is performed, the wireless operation and maintenance tool searches for the access point, establishes a wireless channel, performs identity authentication and parameter verification, and opens the operation and maintenance function after success, and if no message is received from the operation and maintenance tool or no response is received after continuous sending of messages during the operation and maintenance process, the operation and maintenance is exited and the feeder terminal access point is searched again; The adaptive opening of the wireless access point comprises that the terminal opens for a period t0 in a fixed interval T0 by default, and the wireless access point is closed in a (T0-t0) time interval; In the hotspot period opening, the last time of wireless operation and maintenance and the time occupied by the last wireless operation and maintenance are used for adaptive calculation to real-time correct the parameters T0 and t0; The terminal records the last operation time T in real time last The relationship is represented as: T1 = T cur - T last Wherein, T1 represents the time from the current time to the last wireless operation and maintenance; T cur represents the current time, T last represents the time of the last wireless operation and maintenance; When T1≤0, the wireless access point is in an open state in the current operation and maintenance state; When T l >0, then there is no operation and maintenance terminal access at present, and the wireless access point is in a closed state. The adaptive opening of the wireless access point further comprises that the corrected wireless access point opening time interval is represented as: Wherein, T0' represents the corrected wireless access point opening time interval; The start negotiation time of the feeder terminal and the wireless operation and maintenance tool is used as the feeder terminal operation and maintenance response time, and the disconnection time of the feeder terminal and the wireless operation and maintenance tool is used as the operation and maintenance end time; The feeder terminal actively records the response time of the last wireless operation and the end time of the wireless operation, and sets the last wireless operation period as t last is expressed as: t last = t respond-last - t final-last Wherein, t last represents the cycle of the last wireless operation and maintenance, that is, the occupation time of the last wireless operation and maintenance; t respond-last represents the response time of the last wireless operation and maintenance; t final-last represents the end time of the last wireless operation and maintenance; The corrected wireless access point opening time window is calculated, and the formula is: Wherein, T win represents the open time window; k represents the coefficient, which can be defined according to the engineering application conditions.

2. The PNP self-coordination based feeder terminal wireless operation and maintenance method of claim 1, wherein: The self-negotiation interaction model comprises a self-negotiation interaction authentication model and a feeder terminal parameter model; The self-negotiation interaction authentication parameters comprise device ID, registration identification, self-negotiation model feature code and encrypted identity authentication code; The feeder terminal parameters comprise feeder terminal ID, feeder terminal name and feeder terminal SIM card IP; The encrypted identity authentication code on both sides is implemented by using the SM2 encryption algorithm to realize two-way authentication of the terminal and the operation and maintenance tool. 3.The PNP self-coordination based feeder terminal wireless operation and maintenance method of claim 2, wherein: The self-negotiation interaction comprises that the wireless operation and maintenance tool searches for the wireless open access point in the current range, and if multiple feeder terminal access points are searched, the wireless operation and maintenance terminal establishes a wireless channel with the terminal one by one; When the wireless operation and maintenance terminal establishes a wireless channel with the feeder terminal, the wireless operation and maintenance terminal sends a self-registration message, and at this time, the identity authentication code is empty.

4. The PNP self-coordination based feeder terminal wireless operation and maintenance method of claim 3, wherein: The self-negotiation interaction further comprises that the feeder terminal sends a negotiation message with an encrypted identity authentication code after receiving the self-registration message; The feeder terminal signs the unique identification parameter by using the SM2 national encryption algorithm, and the result obtained is the generated terminal identity authentication code; After receiving the negotiation message, the wireless operation and maintenance tool verifies and signs the received identity authentication code, and after successful signature verification; The operation and maintenance tool signs the unique identification parameter of the feeder terminal by using the SM2 national encryption algorithm, and the corresponding identity authentication code is obtained by signature result, and the operation and maintenance tool fills the identity authentication code into the reply negotiation message; The feeder terminal opens the operation and maintenance function after decryption of the identity authentication code.

5. The PNP self-coordination based feeder terminal wireless operation and maintenance method of claim 4, wherein: The self-negotiation interaction further includes that the feeder terminal identity authentication fails, the wireless channel is closed after a delay of 10s after the authentication fails, and the feeder terminal enters the sleep state again; After the wireless operation and maintenance tool operation ends, an end operation message is sent to the feeder terminal; After the feeder terminal receives the end message, the operation and maintenance operation function is closed, and the wireless open access point is closed; If the feeder terminal does not receive the message sent by the wireless operation and maintenance tool within 30s during the operation and maintenance process, it is considered that the communication is interrupted, the connection is closed, the wireless channel is closed after a delay of 10s, and the feeder terminal enters the sleep state again; During the operation and maintenance process, the operation and maintenance tool can resend the message 3 times when connecting with the terminal, if the terminal does not reply after resending 3 times, it immediately establishes connection with the terminal again, if it cannot be connected, it exits the operation and maintenance and searches the feeder terminal access point again.

6. A feeder terminal wireless operation and maintenance system based on PNP self-negotiation using the method of any one of claims 1-5, characterized in that: The wireless access point adaptive opening module: performs wireless access point adaptive opening, so that the feeder terminal opens for a period within a fixed interval, and adjusts in real time according to the time and duration of the last wireless operation and maintenance; The self-negotiation interaction model establishment module: establishes a self-negotiation interaction model, during the opening period of the feeder terminal wireless access point, when the wireless operation and maintenance tool connects the terminal and establishes a wireless channel, the two parties perform self-negotiation interaction to complete the reading of device parameters; The self-negotiation interaction module: performs self-negotiation interaction, the wireless operation and maintenance tool searches the access point, establishes a wireless channel, performs identity authentication and parameter verification, opens the operation and maintenance function after success, and exits the operation and maintenance and searches the feeder terminal access point again if it does not receive the message of the operation and maintenance tool or continuously sends the message without response during the operation and maintenance process. 7.A computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer device is configured to perform the method according to any one of claims 1-6 when the computer program is executed by the processor. The processor executes the computer program to realize the steps of the method of any one of claims 1-5.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the method of any one of claims 1-5.

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