Unified operation and maintenance system of distribution network comprehensive protection measurement and control device and implementation method

Abstract

The invention discloses a unified operation and maintenance system of a distribution network comprehensive protection measurement and control device and an implementation method, and the system comprises the distribution network comprehensive protection measurement and control device which is configured to realize operation flow solidification and data interaction automation through a unified operation and maintenance functional architecture and comprises a central processor, a communication interface module and a data encryption chip; the operation and maintenance terminal is configured to perform data interaction with the distribution network comprehensive protection measurement and control device by adopting a preset communication protocol through the communication interface module; the communication interface module comprises a wireless communication module and a wired serial port communication module; and the data encryption chip is used for realizing bidirectional identity authentication and data encryption between the operation and maintenance terminal and the device. The Bluetooth module is additionally arranged on hardware, interaction with a mobile phone operation and maintenance APP is carried out through a specified communication protocol, and operation and maintenance operation process solidification and data interaction automation can be achieved, so that the manual misoperation risk and the equipment compatibility failure rate are reduced, and the operation and maintenance response speed and the system reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of power distribution network comprehensive protection measurement and control, and particularly relates to a unified operation and maintenance system and implementation method of a power distribution network comprehensive protection measurement and control device, and is particularly suitable for improving power distribution network operation and maintenance efficiency and system reliability. BACKGROUND

[0002] At present, with the in-depth promotion of smart grid construction, the power distribution network comprehensive protection measurement and control device as the "nerve ending" of the safe operation of the power system directly affects the power supply reliability and operation and maintenance efficiency. The current mainstream power distribution network comprehensive protection measurement and control device generally adopts integrated human-computer interaction design, which has improved the functional integration degree, but also exposed the following systematic defects:

[0003] Firstly, real-time monitoring data display, protection setting value modification, operation and maintenance functions are mixed together, resulting in a high probability of misoperation.

[0004] Secondly, the operation logic of different manufacturers' devices is significantly different, and the training cost of operation and maintenance personnel is high.

[0005] Thirdly, the operation and maintenance data lack standardized interfaces, forming an information island, and it is difficult to realize data interconnection and unified management.

[0006] Therefore, there is an urgent need for a technical solution that can realize operation and maintenance operation process solidification, data interaction automation, and support for unified management of multiple devices. SUMMARY

[0007] Therefore, the present application provides a unified operation and maintenance system and implementation method of a power distribution network comprehensive protection measurement and control device, aiming to solve the problems of function mixing, operation and maintenance data island caused by the integrated human-computer interaction design of the power distribution network comprehensive protection measurement and control device, and the low operation and maintenance efficiency and complex field operation caused by the inconsistent operation and maintenance methods of different power distribution network comprehensive protection measurement and control devices. Thus, the defects of low operation and maintenance efficiency, complex field operation, and high risk of misoperation are overcome.

[0008] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0009] In a first aspect, the present application provides a unified operation and maintenance system of a power distribution network comprehensive protection measurement and control device, comprising:

[0010] The power distribution network comprehensive protection measurement and control device is configured to realize operation process solidification and data interaction automation through a unified operation and maintenance function architecture, including a central processor, and a communication interface module and a data encryption chip connected with the central processor;

[0011] The operation and maintenance terminal is configured to interact with the power distribution network comprehensive protection measurement and control device through the communication interface module;

[0012] The communication interface module comprises a main communication channel and a backup communication channel, the main communication channel is a wireless communication module, and the backup communication channel is a wired serial communication module.

[0013] The operation and maintenance terminal and the distribution network integrated protection and measurement and control device adopt a preset communication protocol for data exchange.

[0014] The data encryption chip is used to realize bidirectional identity authentication and data encryption between the operation and maintenance terminal and the device.

[0015] Further, the wireless communication module is a Bluetooth communication module supporting BLE5.2 protocol.

[0016] Further, the wired serial communication module is an RS485 serial module.

[0017] Further, the preset communication protocol is IEC608705103 protocol.

[0018] Further, the operation and maintenance terminal is a mobile phone APP or computer software supporting at least one of the following operation and maintenance functions: telemetry data acquisition, remote state query, remote control operation, setting value, SOE record query, program upgrade, and operation and maintenance report generation.

[0019] Further, the data encryption chip supports a national secret algorithm and is used to realize bidirectional authentication and data signature based on digital certificates.

[0020] Further, the operation and maintenance terminal and the distribution network integrated protection and measurement and control device establish a secure session channel, and the establishment of the secure session channel comprises a challenge-response mechanism and digital certificate verification.

[0021] In a second aspect, the embodiments of the present application further provide a unified operation and maintenance method of the system as described in any one of the first aspect, comprising the following steps:

[0022] The operation and maintenance terminal initiates a connection request;

[0023] The distribution network integrated protection and measurement and control device receives the request and returns an encrypted challenge;

[0024] The operation and maintenance terminal responds using a digital certificate;

[0025] After bidirectional authentication is completed, a secure session is established;

[0026] The operation and maintenance terminal exchanges data with the device through a preset communication protocol;

[0027] After operation and maintenance is completed, an operation and maintenance report containing a timestamp and a digital signature is automatically generated.

[0028] Furthermore, the data interaction includes at least one of the following operations:

[0029] Acquire device information, telemetry data, and input status;

[0030] Perform remote control operations, modify setpoints, and set protection parameters;

[0031] Query SOE event records and communication parameter configurations.

[0032] Furthermore, the communication protocol is implemented through AT command encapsulation in the main communication channel and transmitted directly in the backup communication channel.

[0033] As can be seen from the above technical solution, compared with the prior art, the present invention has the following technical advantages:

[0034] An additional Bluetooth module has been added to the hardware, which interacts with the mobile maintenance APP through a specified communication protocol. This enables the standardization of maintenance operation processes and the automation of data interaction, thereby reducing the risk of human error and equipment compatibility failure rate, and improving maintenance response speed and system reliability. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 The unified operation and maintenance system structure diagram of the distribution network integrated protection and control device provided by the present invention.

[0037] Figure 2 The circuit diagram of the RS485 interface and Bluetooth communication module provided by this invention.

[0038] Figure 3 The data encryption chip interface circuit diagram provided for this invention.

[0039] Figure 4 The operation flowchart of the operation and maintenance APP provided by the present invention.

[0040] Figure 5 The flowchart shows the interaction between the integrated protection and control device and the operation and maintenance APP provided by this invention.

[0041] Figure 6 This is a diagram of the unbalanced transmission process provided by the present invention. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] This invention discloses a unified operation and maintenance system for a distribution network integrated protection and control device, comprising:

[0044] The distribution network integrated protection and control device is configured to realize the solidification of operation procedures and the automation of data interaction through a unified operation and maintenance functional architecture, including a central processing unit, a communication interface module connected to the central processing unit, and a data encryption chip;

[0045] The operation and maintenance terminal is configured to interact with the integrated protection and control device of the distribution network through the communication interface module.

[0046] The communication interface module includes a main communication channel and a backup communication channel. The main communication channel is a wireless communication module, such as a Bluetooth communication module, which supports the BLE5.2 protocol. The backup communication channel is a wired serial communication module, which can be an RS485 serial port module.

[0047] The maintenance terminal and the distribution network integrated protection and control device exchange data using the IEC608705103 protocol.

[0048] The aforementioned data encryption chip supports national cryptographic algorithms and is used to achieve two-way authentication and data encryption between maintenance terminals and devices based on digital certificates.

[0049] The maintenance terminal is a mobile app or computer software. The entire system of this invention adds unified maintenance functions to the original functions of the distribution network integrated protection and control device, mainly including telemetry data acquisition, remote signaling status query, remote control operation, setting of parameters, SOE record query, program upgrade, and maintenance report generation. Technically, a Bluetooth communication module is used as a standardized physical interface to interact with the mobile maintenance app, and an RS485 serial port is used as a backup interface to interact with the computer maintenance app. A specific communication protocol is agreed upon to ensure interoperability and data exchange between different devices, thus preserving the independence of the original devices while achieving unified maintenance at the maintenance level.

[0050] The unified operation and maintenance system for the integrated protection and control device of the distribution network provided in this embodiment of the invention can reduce the risk of human error by standardizing the operation process through an APP; realize the unified collection and management of operation and maintenance data, breaking down information silos; adopt a dual-channel redundant design, with primary and backup communication channels to ensure communication reliability; in addition, it has a security authentication mechanism, with encryption chips and digital certificates to ensure the security of data transmission and identity authentication; at the same time, the system has strong compatibility and can support a variety of devices and operation and maintenance terminals, reducing training and maintenance costs.

[0051] The invention will now be further described with reference to the accompanying drawings:

[0052] I. Implementation of Operation and Maintenance Functions of Integrated Protection and Control Devices for Distribution Networks

[0053] The foundation for realizing the operation and maintenance functions of the distribution network integrated protection and control device is to realize the complete functions of the distribution network integrated protection and control device, such as... Figure 1 As shown, the unified operation and maintenance system of the distribution network integrated protection and control device provided by the present invention adopts a modular design and includes the following core modules: central processing unit, analog quantity acquisition, remote signaling quantity acquisition, control output interface, communication interface, keypad LCD display processor, power supply module, backup battery, data encryption chip, etc. At the same time, the system supports a variety of protection functions, including time-limited three-stage protection function, reclosing function, low voltage protection function, surge current prevention function, inverse time protection function, bus grounding alarm function, etc.

[0054] This invention integrates a Bluetooth module while retaining an RS485 serial port as a backup channel, thus constructing a dual-channel communication architecture to provide hardware support for operation and maintenance functions, such as... Figure 2 As shown, a dual-channel communication architecture (RS485 + Bluetooth) was designed, and wired and wireless communication with the operation and maintenance APP is carried out through IEC103, thereby realizing independent operation and maintenance functions and solving the problem of misoperation.

[0055] Specifically, such as Figure 2 As shown, the dual-channel circuit design implements RS485 and Bluetooth functions. The TTL level signal from the UAART1 serial port of the MCU (central controller) is input through the module's TXD and RXD pins, then passes through the RS485 transceiver, and is output as a differential RS485 signal through the A / B pins. Finally, it connects to the RS485A / B EXT external bus, thus realizing RS485 serial communication. The differential signal A / B lines are clamped for surge voltage by TVS diodes (D1 / D2 / D3), and overcurrent protection is provided by resettable fuses (F1 / F2). Matching resistors (R2) and pull-down resistors (R3) ensure signal stability when the bus is idle and suppress reflection interference.

[0056] The MCU's USART2 pin connects to the Bluetooth module's TXD / RXD pins for bidirectional data transmission. The MCU's I / O ports connect to the Bluetooth module's SLEEP / MODE / DISC pins for sleep control, mode switching, and disconnection. An LED is connected to VCC via a current-limiting resistor (R5). The Bluetooth module's LINK pin controls the LED's on / off state, indicating the Bluetooth connection status (solid on when connected, flashing when disconnected). A capacitor is connected in parallel to the Bluetooth module's VCC terminal to filter power supply ripple and ensure stable wireless communication.

[0057] In actual communication scenarios between maintenance software and protection devices, the IEC 103 protocol demonstrates multi-dimensional adaptability advantages. First, its master-slave polling mechanism is highly compatible with power maintenance needs: the maintenance software, acting as the master station, can periodically invoke device status (such as remote signaling and telemetry), while the slave station responds on demand, avoiding communication congestion while meeting the real-time monitoring needs of maintenance personnel. Second, the protocol supports data types covering core maintenance scenarios, including protection action records (type identifier 02h), SOE events (41h), and setting parameters (21h). This structured data can be directly used for fault diagnosis and energy efficiency analysis.

[0058] Using the IEC103 protocol under Bluetooth, dual-channel protocol compatibility is achieved by encapsulating IEC103 data packets with AT commands. Specifically: when used with the RS485 serial port, it's an IEC103 data packet; when the Bluetooth module sends data, it uses AT+LESEND=0 (length of data to be sent) and an IEC103 data packet; when the Bluetooth module receives data, it uses +DATA=0 (length of data to be received) and an IEC103 data packet. This solution extracts the IEC103 data packet upon receiving data, and the subsequent parsing logic is completely consistent with RS485 data reception, thus enabling wired and wireless connections with maintenance software.

[0059] Currently, the operation and maintenance functions of the integrated protection and control device for the distribution network are mainly protected by a fixed administrator password input interface on the dot matrix screen, which has weak security. The operation and maintenance functions should be separated and the security of information should be ensured by personnel authentication login through the operation and maintenance APP and the secure authentication connection between the operation and maintenance software and the protection and control device.

[0060] In this solution, the Bluetooth module automatically initializes upon power-up and then enters slave mode. The communication interface is a USART2 serial port with a baud rate of 115200bps, 8 data bits, 1 stop bit, no parity, no flow control, and TTL level. The MCU (central controller) controls the Bluetooth module via AT commands. The AT command format starts with 'AT+' and ends with '\r\n'. The difference between using a Bluetooth module and RS485 serial ports is that when using a serial port, the device MCU receives, parses, and sends IEC608705103 protocol messages via USART1. When using Bluetooth, the device MCU must encapsulate AT Bluetooth commands based on the IEC608705103 protocol. The MCU then sends the commands to the Bluetooth module via the USART2 serial port to achieve data transmission and reception.

[0061] To ensure communication security, a hardware encryption chip is added to the device, such as... Figure 3 As shown, this achieves two-way encryption authentication between the operation and maintenance software and the device: with the microcontroller MCU as the core, the SPI interface (SPI2_MOSI, SPI2_MISO, SPI2_CPNTROL, SPI2_SCK) of the MCU is connected to the SPI interface (MOSI, MISO, SSN, SCK) of the encryption chip SC1161, and data is transmitted through the SPI protocol to achieve data encryption or decryption.

[0062] The two-way authentication process using SM2 national cryptographic algorithm digital certificates is as follows:

[0063] (1) Maintain the connection between the software and the equipment;

[0064] (2) The maintenance software generates a random number R1 and sends it to the terminal;

[0065] (3) The device retrieves a random number R2 through the encryption chip, signs R1+R2, and sends it to the maintenance software. At the same time, the device saves R1.

[0066] (4) The maintenance software verifies the validity of the signature, and then the maintenance software signs the device random number R2 and sends the signature result to the device;

[0067] (5) Verify the correctness of the equipment maintenance software signature. Once the verification is successful, the identity authentication of both parties is completed.

[0068] How to use the encryption chip:

[0069] The MCU initializes the SPI interface by setting SSN=0 via SPI1_CONTROL; it then sends a command to the encryption chip via SPI2_MOSI, setting SSN=1 after the command is sent. The MCU then switches to receive mode, waiting for the encryption chip to send data, during which time SPI2_MOSI is set low. The MCU waits to receive the BUSY status word until it receives 0x55. After receiving the data from the encryption chip, the MCU sets SSN=1 again upon completion.

[0070] Regarding the encryption chip's algorithm, such as the digital signature function of the SM2 algorithm used in this scheme, the message hash value is signed using a private key to generate (r,s);

[0071] Digital signature:

[0072] Calculate the message hash value e = HASH(Z_A || M), where Z_A is the user's identity identifier.

[0073] Generate random numbers k∈[1,n-1], and calculate point (x1,y1)=kG

[0074] r = (e + x1) mod n; if r = 0, then k is chosen again.

[0075] s=((1+d_A) -1 * (k - r*d_A)) mod n, output signature (r,s)

[0076] Signature verification:

[0077] Verify that r, s ∈ [1, n-1]

[0078] Calculate t = (r + s) mod n, and the point (x1, y1) = sG + tP_A

[0079] Verify that r ≡ (e + x1) mod n

[0080] This integrated architecture, combining RS485 and Bluetooth dual communication and IEC103 protocol with encryption chips, enables independent operation and maintenance functions, standardized operations, and secure information.

[0081] The security authentication process is as follows: the APP initiates a connection request, the device returns an encryption challenge, the APP responds with a CA certificate and sends it to the device for authentication. After successful authentication, a secure session channel is established. The device uses an encryption chip method. The MCU first parses the received data packet, writes the corresponding SPI instruction, and sends it to the encryption chip via the SPI bus. The MCU waits to receive the SPI, and the chip replies with the corresponding instruction message via the SPI bus, completing encryption / decryption or signature verification.

[0082] II. Interaction methods between the device and the maintenance APP:

[0083] The maintenance app initiates a Bluetooth connection request. The device receives the request and returns an encrypted challenge containing the serial number (SN). The app submits a response signed with a CA certificate, establishing a secure session channel between the device and the app. The maintenance app, acting as an IEC608705103 master station, sends messages for obtaining device information, telemetry data, input information, parameter settings, and output test operations. The Bluetooth module connected to the integrated protection device receives these messages, processes them, performs information queries or actions according to the specified procedures, and replies via Bluetooth, thus forming a data interaction between the app and the device. After maintenance is completed, the app automatically generates a timestamped maintenance report with a digital signature, thereby achieving independent maintenance functions and solidifying the maintenance operation process. Figure 4 As shown.

[0084] The device connects to a mobile phone via Bluetooth module to enable data interaction between the device and the mobile maintenance app. In case of Bluetooth communication failure, it can connect to a computer serial port via a backup RS485 serial port to continue data interaction and maintenance operations. The interaction process between the computer maintenance app and the device is similar to the Bluetooth interaction process. The difference on the device side is that when using Bluetooth for maintenance, received messages need to be processed using Bluetooth commands, and sent messages need to be encapsulated using Bluetooth commands, such as... Figure 5 As shown.

[0085] Communication methods and media:

[0086] The device and maintenance software in this solution primarily communicate via the IEC 608705103 protocol (hereinafter referred to as the IEC 103 protocol). The IEC 103 protocol employs a master-slave communication mode. In this solution, the master station (maintenance software) sends commands to the slave station (integrated protection and control device), and the slave station responds to the commands sent by the master station and transmits data. IEC 103 protocol messages are transmitted in an unbalanced manner. During communication, only the master station can act as the initiating station; the slave station only transmits data after receiving a request from the master station. This question-and-answer master-slave communication ensures the stability and security of the communication. Figure 6This is an unbalanced transmission process. The IEC 103 protocol message supports both fixed-frame and variable-frame message formats, ensuring communication flexibility. IEC 103 protocol messages can be transmitted through various communication lines and media. In serial mode, RS-485 / RS-232 communication methods can be used, and in network mode, TCP / IP is employed, demonstrating wide applicability. This solution primarily employs two communication methods: serial mode and Bluetooth encapsulation of AT commands based on the serial mode. After the integrated protection and control device receives the IEC 103 protocol message, it first distinguishes between fixed-frame and variable-length frames based on the start character and then performs different processing. Next, it parses the address field and control field of the received message frame. The address field specifies the address of the receiver or sender, and the control field distinguishes different frames and data transmission directions. By parsing this information, the integrated protection and control device can accurately obtain the actual data information and perform corresponding processing according to the function codes.

[0087] III. Implementation and Usage Instructions for the Mobile Maintenance App:

[0088] The mobile maintenance app is developed using Android and mainly includes interface design and Bluetooth connectivity. The software interface includes a login interface, main interface, connection interface, program upgrade interface, device information interface, telemetry interface, input interface, output interface, protection parameter interface, communication parameter interface, record query interface, and maintenance report interface. Bluetooth connectivity is implemented in the Android application to connect via Bluetooth, search for and pair devices, and send and receive data, including byte stream operations and file transfer functions.

[0089] Instructions for using maintenance software

[0090] Maintenance personnel login: To access the maintenance software, first enter the login interface, then enter your account and password. Only after entering the correct password can you enter the main interface of the maintenance software.

[0091] Creating a connection: All operations must be based on the connection between the maintenance software and the device. After entering the main interface of the maintenance software, click "Create Connection". The maintenance software will send a message and wait to receive the correct message. Only after the connection is successful can other operations be performed.

[0092] Program Upgrade: Click the Program Upgrade button to enter the program upgrade interface. Click Enter bootloader, enter your username and password, and the software will send a boot command message. Wait for the device to reply. The software will then display that it has entered boot. Select the bin file on the software interface and click download to upgrade the software.

[0093] Device Information: Click the Device Information button to enter the Device Information button interface. Click Get Parameters and the software will send a Get Device Information message. Wait for the device to respond. The software interface will display the device information. The corresponding device information can be modified. After modification, click Modify Parameters and the software will send a Modify Parameter message. After successful writing, a success interface will be displayed.

[0094] Telemetry Data: Click Telemetry to enter the telemetry interface. The software will send a message to obtain telemetry data and wait for the device's response. The software interface will then display the telemetry data.

[0095] Input Information: Click "Input" to enter the input interface. The software will send an input data acquisition message and wait for the device's response. The software interface will then display the input data. Input data acquisition messages will be sent periodically from this interface.

[0096] Opening Test: Click "Open" to enter the opening interface, select the corresponding opening, choose to split or combine, and click the "Execute" button. The device will send a control opening command, and the device will perform the opening action after receiving the command.

[0097] Protection parameter settings: Click on protection parameters to enter the protection parameter interface. The software will send a message to obtain protection parameters and wait for the device's response. The software interface will display the protection parameters. On this interface, you can modify the corresponding protection parameters, including protection activation / deactivation, protection settings, protection delay time, etc. After modification, click on modify parameters. The software will send a message to modify parameters. After successful writing, a success interface will be displayed.

[0098] Communication parameter settings: Click on Communication Parameters to enter the Communication Parameters interface. Click on Get Parameters, and the software will send a message to get communication parameters. Wait for the device to respond. The software interface will display the communication parameter information. On this interface, you can modify the corresponding communication parameters, including serial port baud rate, serial port protocol, etc. After modification, click Modify Parameters, and the software will send a Modify Parameters message. After successful writing, a success interface will be displayed.

[0099] Record Query: Click Record Query to enter the record query interface. The software will send a query SOE message and wait for the device's response. The software interface will then display the device's SOE records.

[0100] Operation and maintenance report generation: The operation and maintenance software supports recording all operations, including parameter modifications, control commands and alarm events, and generating PDF format operation and maintenance reports, supporting digital signatures and timestamps.

[0101] This unified operation and maintenance method, which uses a mobile operation and maintenance APP to operate and maintain integrated protection and control devices, separates the operation and maintenance functions of integrated protection and control devices, solves the problem of mixed functions, and reduces the risk of human error. At the same time, the mobile operation and maintenance APP can realize the solidification of operation and maintenance procedures and the automation of data interaction, which can solve the problems of complicated on-site operations and isolated operation and maintenance data.

[0102] The unified operation and maintenance system for distribution network integrated protection and control devices provided by this invention, through a dual-channel communication architecture, unified communication protocol and security encryption mechanism, realizes the independence, standardization and informatization of the operation and maintenance functions of distribution network integrated protection and control devices, effectively solves the problems of mixed functions, data silos and inconsistent operations in the prior art, and significantly improves operation and maintenance efficiency and system reliability.

[0103] Furthermore, based on the same inventive concept, this invention also provides a unified operation and maintenance method for the system as described in the above embodiments, comprising the following steps:

[0104] S1. The maintenance terminal initiates a connection request;

[0105] S2. The integrated protection and control device for the distribution network returns an encrypted challenge;

[0106] S3. The maintenance terminal responds using a digital certificate;

[0107] S4. After both parties complete mutual authentication, a secure session is established;

[0108] S5. The maintenance terminal interacts with the device via a communication protocol. This data interaction includes at least one of the following operations: acquiring device information, telemetry data, and input status; performing remote control operations, modifying settings, and setting protection parameters; querying SOE event records and configuring communication parameters. The communication protocol is IEC608705103, implemented through AT command encapsulation in the main communication channel and transmitted directly in the backup communication channel.

[0109] S6. Automatically generate an operation and maintenance report containing timestamps and digital signatures after the operation and maintenance is completed.

[0110] This implementation method, through the solidification of operation procedures on the maintenance terminal, enables automatic data interaction and report generation, solving the problems of complex on-site operations and high training costs, and significantly improving maintenance response speed. It also employs two-way authentication and data encryption to reduce the risk of unauthorized access and misoperation; the dual-channel (Bluetooth + RS485) redundant design ensures communication reliability. Using the IEC103 communication protocol and standardized interfaces breaks down data silos between different devices, achieving unified maintenance across devices and solving the problem of poor compatibility. Furthermore, separating maintenance functions from the integrated human-machine interface avoids functional confusion and reduces the risk of misoperation on the core protection function interface from the source.

[0111] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0112] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A unified operation and maintenance system of a distribution network integrated protection supervisory and control device, characterized in that, The application relates to a power distribution network integrated protection and control device configured to realize operation process solidification and data interaction automation through a unified operation and maintenance function framework, comprising a central processor, a communication interface module and a data encryption chip connected with the central processor. An operation and maintenance terminal is configured to perform data interaction with the power distribution network integrated protection and control device through the communication interface module. The communication interface module comprises a main communication channel and a backup communication channel, the main communication channel is a wireless communication module, and the backup communication channel is a wired serial communication module. The operation and maintenance terminal and the power distribution network integrated protection and control device adopt a preset communication protocol for data exchange. The data encryption chip is used for realizing bidirectional identity authentication and data encryption between the operation and maintenance terminal and the device. The wireless communication module is a Bluetooth communication module supporting a BLE5.2 protocol.

2. The system of claim 1, wherein, The wired serial communication module is an RS485 serial communication module.

3. The system of claim 1, wherein, The preset communication protocol is an IEC608705103 protocol.

4. The system of claim 1, wherein, The operation and maintenance terminal is a mobile phone APP or computer software supporting at least one of the following operation and maintenance functions: remote measurement data acquisition, remote state query, remote control operation, fixed value setting, SOE record query, program upgrading and operation and maintenance report generation.

5. The system of claim 1, wherein, The data encryption chip supports a national secret algorithm and is used for realizing bidirectional authentication and data signature based on a digital certificate.

6. The system of claim 1, wherein, The operation and maintenance terminal and the power distribution network integrated protection and control device establish a secure session channel, and the establishment of the secure session channel comprises a challenge-response mechanism and digital certificate verification.

7. The system of claim 1, wherein, The application further relates to a method for realizing operation and maintenance of a power distribution network integrated protection and control device, comprising the following steps:

8. The unified operation and maintenance method of the system according to any one of claims 1-7, characterized in that, An operation and maintenance terminal initiates a connection request; The power distribution network integrated protection and control device receives the request and returns an encrypted challenge; The operation and maintenance terminal responds by using a digital certificate; After bidirectional authentication is completed, a secure session is established; The operation and maintenance terminal performs data interaction with the device through a preset communication protocol; After operation and maintenance is completed, an operation and maintenance report containing a timestamp and a digital signature is automatically generated. The data interaction comprises at least one of the following operations:

9. The method of claim 8, wherein, Device information, remote measurement data and incoming state acquisition; Remote control operation, fixed value modification and protection parameter setting execution; SOE event record query and communication parameter configuration. The communication protocol is realized through AT instruction encapsulation in the main communication channel and direct transmission in the backup communication channel.

10. The method of claim 8, wherein, ​

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