Substation indoor grounding line state monitoring system

Abstract

The application discloses a substation indoor grounding wire state monitoring system, which comprises an RFID positioning unit, a positioning detection unit, a mechanical locking unit and a state monitoring unit. The RFID positioning unit is fixedly installed on the grounding end in the substation. The positioning detection unit and the mechanical locking unit are connected through a grounding rod. The mechanical locking unit is connected below the grounding end of the grounding rod. The leading wire above the grounding end is connected with the positioning detection unit through a wire. The state monitoring unit is connected with the mechanical locking unit and the positioning detection unit through a wireless communication module. The positioning detection unit comprises a grounding fastening assembly and an Internet of Things positioning module. The grounding fastening assembly is fixedly connected with the terminal end of the leading wire of the grounding rod. The Internet of Things positioning module is sleeved on the leading wire. The monitoring system integrates the positioning, mistake prevention and state monitoring requirements of the substation indoor grounding wire, overcomes the defects of the traditional management mode and realizes intelligent and standardized management.

Description

Technical Field

[0001] This invention relates to the field of substation operation and maintenance safety technology, and in particular to a substation indoor grounding wire status monitoring system. Background Technology

[0002] Substations are the core nodes of power system for power conversion and transmission. Their operation and maintenance safety directly determines the stable operation of the power grid and the safety of people's lives and property. Grounding wires are a key safety guarantee measure to prevent equipment from suddenly becoming energized and to avoid electric shock to personnel during substation maintenance operations. Their standardized management is one of the core links of operation and maintenance safety.

[0003] However, traditional grounding wire management methods have many hidden dangers. On the one hand, the location of grounding wires within the station relies on manual recording and inspection, which is inefficient and prone to positioning errors, seriously affecting the progress of equipment maintenance and fault handling. On the other hand, the failure to hang or remove grounding wires is easy to occur. Due to the lack of real-time monitoring and alarm methods, once an operational error occurs, it can easily lead to serious safety accidents such as electric shock and equipment damage, threatening the stable operation of the power system and the safety of personnel. In addition, the grounding wire operation process relies solely on manual self-discipline and lacks mandatory interlocking measures, so the risk of misoperation always exists. Summary of the Invention

[0004] To overcome the above problems, the purpose of this invention is to provide a substation indoor grounding wire status monitoring system. This monitoring system integrates the needs for locating, preventing errors, and monitoring the status of substation indoor grounding wires, overcoming the deficiencies of traditional grounding wire management methods in terms of real-time performance, accuracy, and mandatory error prevention. It enables the transformation of substation operation and maintenance from manual experience-driven to digital and intelligent-driven, improves the safety level of power system operation and maintenance, reduces the incidence of safety accidents, and further realizes intelligent and standardized management.

[0005] The technical solution adopted in this invention is:

[0006] The substation indoor grounding wire status monitoring system includes an RFID positioning unit, a positioning detection unit, a mechanical interlocking unit, and a status monitoring unit. Multiple RFID positioning units are fixedly installed on the grounding terminals inside the substation. The positioning detection unit and the mechanical interlocking unit are connected together via a grounding rod. The mechanical interlocking unit is connected below the grounding terminal of the grounding rod, and a wire leads out from above the grounding terminal to connect to the positioning detection unit. The status monitoring unit is connected to the mechanical interlocking unit and the positioning detection unit via a wireless communication module.

[0007] The positioning detection unit includes a grounding fastening component and an IoT positioning module. The grounding fastening component is fixedly connected to the end of the grounding rod lead wire, and the IoT positioning module is sleeved on the lead wire and located on one side of the grounding fastening component.

[0008] As a further description of the present invention, the mechanical locking unit adopts a blocking tongue structure, including a fixed body, a blocking tongue, a geared motor, a LoRa communication module, a control module, a power module, and a charging interface. A through hole is provided on one side of the fixed body, which is fixedly connected to the lower position of the grounding end of the grounding rod. The blocking tongue is rotatably connected to the fixed body. In the closed state, the blocking tongue forms a closed structure with the grounding end of the grounding rod. In the open state, the grounding rod can be normally engaged. The geared motor, LoRa communication module, and control module are installed inside the fixed body. The output shaft of the geared motor is connected to the rotation shaft of the blocking tongue. The control module is connected to the geared motor and the LoRa communication module. The power module is connected to the geared motor, the LoRa communication module, and the control module. The charging structure is located on the side of the fixed body and is connected to the power module.

[0009] As a further description of the present invention, the positioning detection unit has a built-in LoRa communication module and an RFID identification module.

[0010] As a further description of the present invention, the status monitoring unit includes a web terminal and a mobile terminal. The web terminal communicates with the positioning monitoring unit and the mechanical interlocking unit through a LoRa communication module, and the mobile terminal communicates with the web terminal through 4G / 5G.

[0011] As a further description of the present invention, the grounding fastening assembly is fastened using a threaded knob structure.

[0012] As a further description of the present invention, the control module adopts an STM32 series low-power microcontroller.

[0013] As a further description of the present invention, the RFID positioning unit adopts an anti-metal RFID electronic tag, which is installed at the fixed position of the grounding terminal bolt of the substation, and the identification distance of the anti-metal RFID electronic tag is 3 cm to 5 cm.

[0014] As a further description of the present invention, the power module adopts a lithium-ion battery pack, and the charging interface adopts a Type-C charging interface.

[0015] As a further description of the present invention, the web interface includes substation management, alarm management, approval management, and system management. The substation management interface stores wiring diagrams for each substation, the alarm management interface stores historical alarm information, the approval interface stores approval information, and the system management interface stores relevant parameter information and configuration information.

[0016] As a further description of the present invention, the mobile terminal includes a substation interface, a problem record interface, and an approval list interface. The substation interface stores all substation wiring diagrams and grounding wire location diagrams. The problem record interface records relevant problems. The approval list interface is used to initiate approvals and the corresponding approval records.

[0017] The beneficial effects of this invention are:

[0018] This invention relates to a substation indoor grounding wire status monitoring system. This system utilizes four modules—RFID positioning unit, positioning detection unit, mechanical interlocking unit, and status monitoring unit—to achieve mandatory sequential control and remote status monitoring of the grounding status in indoor substations. This effectively prevents operational errors. During actual grounding wire operations, each terminal in the substation is equipped with an RFID positioning unit. When using a grounding rod, approval is first initiated via the mobile terminal of the status monitoring unit. Upon receiving the request on the web terminal, the corresponding management personnel approve it on the web terminal, and the mechanical interlocking unit enters a "ready for use" state. Once the positioning detection unit completes the grounding operation, the mechanical interlocking unit opens, allowing relevant personnel to perform substation safety maintenance operations. This mandatory sequential control ensures a safe operation of "grounding terminal first, then conductor terminal," thereby ensuring the safety and reliability of substation grounding operations. Furthermore, the status monitoring unit enables real-time status monitoring and remote control of substation grounding operations through a web terminal (management terminal) and a mobile terminal (maintenance terminal), achieving digital management of grounding wire operations and overcoming the problems of traditional grounding wire operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the positioning detection unit and mechanical interlocking unit of the substation indoor grounding wire status monitoring system proposed in this invention on the grounding rod.

[0020] Figure 2 This is a schematic diagram of the mechanical interlocking unit structure of the substation indoor grounding wire status monitoring system proposed in this invention.

[0021] Figure 3 This is a schematic diagram of the positioning and detection unit structure of the substation indoor grounding wire status monitoring system proposed in this invention.

[0022] Figure 4 This is a diagram of the substation management page on the web interface of the substation indoor grounding wire status monitoring system proposed in this invention.

[0023] Figure 5 This is a diagram of the web-based approval management page for the substation indoor grounding wire status monitoring system proposed in this invention.

[0024] Figure 6This is a screenshot of the mobile substation management page of the substation indoor grounding wire status monitoring system proposed in this invention.

[0025] Explanation of reference numerals in the attached figures

[0026] 1-Positioning detection unit, 11-Grounding fastening assembly, 12-IoT positioning module;

[0027] 2-Mechanical locking unit, 21-Fixed body, 22-Blocking tongue;

[0028] 3-Grounding rod, 31-Grounding terminal;

[0029] 4-Wire. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0033] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0034] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] like Figures 1-6 As shown, it illustrates a specific embodiment of the present invention:

[0037] Example 1:

[0038] The substation indoor grounding wire status monitoring system includes an RFID positioning unit, a positioning detection unit 1, a mechanical interlocking unit 2, and a status monitoring unit. Multiple RFID positioning units are fixedly installed on the grounding terminals inside the substation. The positioning detection unit 1 and the mechanical interlocking unit 2 are connected together via a grounding rod 3. The mechanical interlocking unit 2 is connected below the grounding end 31 of the grounding rod 3, and a wire 4 extends from the top of the grounding end 31, connecting to the positioning detection unit 1. The status monitoring unit is connected to the mechanical interlocking unit 2 and the positioning detection unit 1 via a wireless communication module.

[0039] In this embodiment, the monitoring system uses four modules—RFID positioning unit, positioning detection unit 1, mechanical interlocking unit 2, and status monitoring unit—to achieve forced sequential control and remote status monitoring of the grounding status of the indoor substation, effectively preventing accidental misoperation.

[0040] The positioning detection unit 1 includes a grounding fastening component 11 and an Internet of Things (IoT) positioning module 12. The grounding fastening component 11 is fixedly connected to the end of the lead wire 4 of the grounding rod 3, and the IoT positioning module 12 is sleeved on the lead wire 4 and located on one side of the grounding fastening component 11.

[0041] Specifically, the positioning detection unit 1 has a built-in LoRa communication module and an RFID identification module.

[0042] Specifically, the status monitoring unit includes a web terminal and a mobile terminal. The web terminal communicates with the positioning detection unit 1 and the mechanical interlocking unit 2 via a LoRa communication module, while the mobile terminal communicates with the web terminal via 4G / 5G. In this embodiment, the web terminal serves as the management terminal, and the mobile terminal serves as the operation and maintenance terminal.

[0043] The grounding fastening assembly 11 is fastened using a threaded knob structure.

[0044] Specifically, the RFID positioning unit uses an anti-metal RFID electronic tag with a working frequency of 13.56MHz. It is installed on the fixed position of the grounding terminal bolt in the substation. The identification distance of the anti-metal RFID electronic tag is 3 cm to 5 cm to ensure reliable contact.

[0045] In this embodiment, the IoT positioning module 12 of the positioning detection unit 1 can identify the number of the RFID positioning unit, thereby obtaining the code of the grounding terminal that needs to be connected, and realizing status monitoring. In addition, the grounding wire is connected through the grounding fastening component 11, which adopts a threaded knob. The whole operation process is simple and convenient, and the grounding terminal connection can be completed quickly. At the same time, after the connection, the IoT positioning module 12 returns the code of the identified grounding terminal to the Web terminal, i.e., the management terminal. The management terminal can realize status monitoring based on the final result.

[0046] Example 2:

[0047] Specifically, the mechanical locking unit 2 adopts a blocking tongue structure, including a fixed body 21, a blocking tongue 22, a geared motor, a LoRa communication module, a control module, a power module, and a charging interface. The fixed body 21 has a through hole on one side and is fixedly connected to the lower position of the grounding end 31 of the grounding rod. The blocking tongue 22 is rotatably connected to the fixed body 21. In the closed state, the blocking tongue 22 forms a closed structure with the grounding end 31 of the grounding rod. In the open state, the grounding rod 3 can be normally connected. The geared motor, LoRa communication module, and control module are installed inside the fixed body 21. The output shaft of the geared motor is connected to the rotation shaft of the blocking tongue 22. The control module is connected to the geared motor and the LoRa communication module. The power module is connected to the geared motor, the LoRa communication module, and the control module. The charging structure is located on the side of the fixed body 21 and is connected to the power module.

[0048] In this embodiment, the blocking tongue structure is opened or closed by a control module. The control module can set the conditions for opening or closing according to the actual safety operation and maintenance requirements of the grounding rod 3, thereby ensuring the safety when performing corresponding operations using the grounding rod 3. The Lora communication module realizes the data transmission of the structure status, receives the instructions issued by the corresponding Web terminal, and realizes the opening or closing of the blocking tongue 22 through the control module. The power module provides power to the entire mechanical interlocking unit.

[0049] Specifically, the control module uses an STM32 series low-power microcontroller.

[0050] Specifically, the power module uses a lithium-ion battery pack, and the charging interface uses a Type-C charging interface.

[0051] In this embodiment, the power module uses a Type-C charging interface and a lithium-ion battery pack to facilitate the charging of the mechanical locking unit, maintain its battery life, and make it easy to use.

[0052] In this embodiment, the blocking tongue structure achieves its open and closed states through stroke detection. Specifically, two small limit switches are used to detect the fully open and fully closed positions, respectively. Furthermore, in the control logic settings of the control system, the control logic for detecting the blocking tongue state is set as follows:

[0053] Fully open state detection: Limit switch 1 is triggered and motor current is detected;

[0054] Fully closed state detection: Limit switch 2 is triggered and motor current is detected.

[0055] The two limit switches are connected to the GPIO pins of the control module (i.e., the STM32 microcontroller) and configured as pull-up inputs. Hardware debouncing circuits are used to ensure the accuracy of status detection.

[0056] In actual use, the power module is equipped with overcharge, over-discharge, overcurrent, and short-circuit protection for the battery to ensure normal operation.

[0057] Example 3:

[0058] Specifically, the web interface includes substation management, alarm management, approval management, and system management. The substation management interface stores wiring diagrams for each substation, the alarm management interface stores historical alarm information, the approval interface stores approval information, and the system management interface stores relevant parameter information and configuration information.

[0059] In this embodiment, the functional modules of the web client are as follows:

[0060] The substation management interface includes two parts: wiring diagram management and grounding wire management.

[0061] The wiring diagram management system supports the drawing, editing, and updating of wiring diagrams for substation primary systems, using SVG vector format to ensure clarity; wiring diagrams can be managed in layers by voltage level and bay, enabling batch configuration and maintenance of node location codes.

[0062] The grounding wire management system provides full-information visualization management of grounding rods, supporting filtering by dimensions such as number, status (unused / pending use / in use), bound wire number, and substation; basic information of grounding rods can be added and edited.

[0063] The approval management interface displays a list of applications pending approval and approved (passed / rejected), and supports quick searching by application time, applicant, substation, and other conditions. During the approval process, users can jump to the wiring diagram to view the mounting location markings, select approval opinions, and submit with one click. The approval results are automatically synchronized to the applicant's mobile device.

[0064] The approval management interface also stores approval records, which are stored in full along a timeline, including complete data such as application information, approval opinions, approvers, and approval time. Records can be exported (in Excel format) and can be accurately queried by grounding rod number, approval result, time range, etc., to meet audit traceability requirements.

[0065] The alarm interface includes two parts: alarm push and alarm log.

[0066] The specific alarm push is as follows: when the wire number verification is inconsistent, the alarm information will be displayed in a pop-up window in real time, and the alarm levels will be distinguished as general / emergency (emergency alarms are highlighted in red).

[0067] The alarm log retains a detailed log of all alarm information, including alarm type, associated grounding rod, trigger time, and relevant personnel; it supports filtering by conditions.

[0068] Specifically, the mobile app includes a substation interface, a problem record interface, and an approval list interface. The substation interface stores all substation wiring diagrams and grounding wire location diagrams. The problem record interface records relevant problems. The approval list interface is used to initiate approvals and the corresponding approval records.

[0069] In this embodiment, the functional modules of the mobile phone are as follows:

[0070] The substation interface allows users to select a substation during operation. Selecting a substation displays the corresponding substation wiring diagram. The interface supports fuzzy search by substation name and displays a list of all substations within the user's permission range. Clicking on a substation loads the corresponding primary system wiring diagram, which supports gesture zooming and panning operations. The wiring diagram nodes are clearly labeled, facilitating on-site location of installation positions.

[0071] After selecting the corresponding substation on the substation interface, select the grounding wire at the corresponding location on the wiring diagram. The grounding wire is associated with the location on the wiring diagram, and only the list of grounding rods allowed at that location is displayed (sorted by status priority, with unused grounding rods at the top). Clicking on a grounding rod will display its basic information such as its number and binding wire number.

[0072] The approval list interface allows users to initiate approvals or view corresponding approval records. The specific steps for initiating an approval are as follows: after selecting the grounding rod, the system automatically associates the location code and line number; after filling in the application reason, the application can be submitted quickly. After the application is submitted, the approval progress (pending approval / approved / rejected) is displayed in real time. When rejected, a push notification containing the reason for rejection is received. The approval record displays all approval records initiated by the user, arranged in reverse chronological order of application time, with the approval status clearly marked. Clicking on a record allows users to view the complete application information and approval comments.

[0073] The problem log interface stores all alarm records. This interface receives alarm information push notifications related to the user's operations and also allows users to view alarm details (such as specific information about line number mismatches).

[0074] In this embodiment, the task scheduling design in the software design of the grounding wire status monitoring system includes multiple parallel tasks such as RFID detection tasks, communication tasks, motor control tasks, and system monitoring tasks, which are scheduled and managed through a real-time operating system.

[0075] Meanwhile, the tongue status management module monitors the status of the two limit switches in real time, and combines the motor current and encoder feedback to accurately determine the actual position of the tongue, ensuring the reliability of the mechanical interlock.

[0076] The workflow control of this monitoring system includes the following steps:

[0077] Step 1: Start the process.

[0078] After receiving the start command from the backend system via the 4G module, the main control unit enters the ready state, initializes each hardware module, and begins the RFID detection process.

[0079] Step 2: RFID verification process.

[0080] The grounding wire end device continuously detects the RFID electronic tag pre-installed near the grounding nut. Only when the tag is identified and the signal is maintained for a preset duration (2-3 seconds) is it determined that the grounding end has been correctly connected.

[0081] Step 3: Tongue control process.

[0082] After successful RFID verification, the main controller notifies the upper device of the grounding rod via the radio frequency module, controlling the motor to open the blocking tongue. During motor operation, the limit switch status is monitored in real time to ensure the motor stops only after the tongue is fully open.

[0083] Step 4: Status reporting process.

[0084] When the tongue is opened, the main controller reports the current location information of the device (location information obtained from RFID tag information) and the status of the tongue to the backend system through the 4G module. The system records the usage location and working status of the grounding rod accordingly.

[0085] Step 5: Remote control process.

[0086] With the tongue in the open position, the backend system can issue a closing command to remotely control the tongue to close. During the closing process, the status of the limit switch is also monitored to ensure complete closure.

[0087] Step 6: Completion of the assignment.

[0088] When the backend sends the end command, the device automatically closes the tongue and stops all operating functions after confirming that the tongue is completely closed.

[0089] The specific operation process of the monitoring system on the web and mobile terminals includes the following steps:

[0090] 1. Mobile operation by maintenance personnel: To initiate an application, open the mobile app, log in to your account, search for and select the target substation in the "Substation List," and load the corresponding wiring diagram;

[0091] 2. Click to select the mounting location on the wiring diagram. The system will automatically associate the location code and jump to the list of grounding rods that can be used at that location.

[0092] 3. Select the grounding rod whose status is "unused", confirm its binding wire number, fill in the reason for the application and submit the application. The APP will display the "pending approval" status in real time.

[0093] 4. Administrator Web Terminal Operation: When the web terminal receives a new application pop-up notification, the administrator can enter the "Approval Management" module and filter the applications to be approved by application time.

[0094] 5. Click on the application record to jump to the wiring diagram to view the mounting location markings and verify the matching degree between the applied wire number and the location;

[0095] 6. Approval approved: The grounding rod status is automatically updated to "Pending Use", the approval result is pushed to the mobile terminal of the maintenance personnel, and an "Available" command is sent to the hardware at the same time; Approval rejected: Fill in the reason for rejection (such as safety risks at the mounting location), and feedback is sent to the mobile terminal simultaneously.

[0096] 7. On-site operation by maintenance personnel: Connection and verification. Maintenance personnel receive the "approval passed" notification and carry the designated grounding rod to the substation site;

[0097] 8. On the mobile device, confirm the mounting location and grounding rod information again. First, attach the grounding rod to the grounding end to trigger the RFID module to read the tag information. Then, the hardware uploads the grounding point information to the backend.

[0098] 9. The backend determines whether the location of the grounding rod is consistent with the application location. If they are consistent, it sends a command to the hardware, which automatically unlocks the blocking tongue to allow the conductor end to be connected. The backend automatically compares the approved wire number with the on-site wire number. If they are consistent, the mobile terminal will display "Operation compliant" and the grounding rod status will be updated to "In use". If they are inconsistent, the blocking tongue will not be opened.

[0099] 10. Anomaly Handling: If the alarm trigger and collaboration do not match the line number verification, the web administrator will immediately receive an emergency alarm pop-up, and the mobile terminal will push a "Line Number Anomaly" prompt to the operation and maintenance personnel.

[0100] 11. Administrators can view anomaly details through the "Alarm Management" module on the web interface and contact maintenance personnel for on-site verification;

[0101] 12. End of use: After the maintenance personnel have completed their work, they can find the corresponding operation record on the mobile device and click "End of use".

[0102] 13. Remove the conductor end and grounding end of the grounding rod. The hardware receives the backend command to close the blocking tongue, and the status is restored to "unused".

[0103] 14. Approval records and operation logs on both the web and mobile platforms are automatically updated, forming a complete closed loop that supports subsequent queries and audits.

[0104] Example 4:

[0105] In this embodiment, the substation indoor grounding wire status monitoring system is adapted to different types of grounding rods. The above embodiment uses a hanging grounding rod. When a crimping grounding rod is used, a grounding wire clamping torque test unit can be added to monitor whether the grounding rod is reliably hung and its status can be added to the corresponding control process.

[0106] Overall, the monitoring system is a collaborative solution integrating multiple hardware modules and a digital management system. It takes an integrated hardware device as the core carrier and integrates modules for ground wire positioning detection, status monitoring, mechanical interlocking, and ground wire clamping torque testing. Simultaneously, a digital management system including substation information management, wiring diagram visualization, and process approval is developed to achieve full-link data interaction between hardware modules and software platforms, ultimately forming a closed-loop intelligent operation and maintenance solution of "physical device + software system".

[0107] In this embodiment, an indoor simulation test platform for a substation was built. The hardware multi-module integrated architecture and core component selection included a low-power STM32 microcontroller, a 13.56MHz anti-metal RFID module, a worm gear reducer motor, and a high-precision torque sensor. This ensured that the component performance matched the functional requirements and met the stability requirements of the indoor substation environment. Finally, the interface matching degree and data transmission stability of each module were tested using a signal generator and oscilloscope. Basic performance tests were then conducted on the core components, including the operational stability and power consumption of the STM32 microcontroller, the identification distance and success rate of the 13.56MHz anti-metal RFID module, the response time of the worm gear reducer motor, and the resolution of the high-precision torque sensor. Specific test results are as follows:

[0108] Table 1 Compatibility and Basic Performance Tests

[0109]

[0110] In this embodiment, the module interface matching degree of the hardware architecture reaches 100%, the data interaction success rate reaches 99.8%, the performance parameters of the core components are fully adapted to the architecture design requirements, and the basic performance indicators of positioning, locking, and torque testing meet the standards.

[0111] Test the hardware functional modules and mechanical interlocking structure, and record key data such as positioning error, interlocking response time, torque measurement, and effectiveness of preventing misoperation.

[0112] Table 2 Hardware Functional Modules and Mechanical Locking Structure Tests

[0113]

[0114] In this embodiment, the average positioning error is 1.73 cm, the probability of failure of anti-misoperation is 0%, the average locking response time is 273.3 ms, the torque measurement resolution is better than 0.01 N·m, and the accuracy of state recognition and locking state detection reaches 100%.

[0115] In summary, the substation indoor grounding wire status monitoring system can effectively achieve online monitoring and ensure the safety of grounding wire operations.

[0116] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0117] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. A substation indoor grounding wire status monitoring system, characterized in that, The system includes an RFID positioning unit, a positioning detection unit (1), a mechanical interlocking unit (2), and a status monitoring unit. There are multiple RFID positioning units, which are fixedly installed on the grounding terminal inside the substation. The positioning detection unit (1) and the mechanical interlocking unit (2) are connected together by a grounding rod (3). The mechanical interlocking unit (2) is connected below the grounding end (31) of the grounding rod (3). A wire (4) is led out from the top of the grounding end (31) and connected to the positioning detection unit (1) through the wire (4). The status monitoring unit is connected to the mechanical interlocking unit (2) and the positioning detection unit (1) through a wireless communication module. The positioning detection unit (1) includes a grounding fastening component (11) and an Internet of Things positioning module (12). The grounding fastening component (11) is fixedly connected to the end of the lead wire (4) of the grounding rod (3). The Internet of Things positioning module (12) is sleeved on the lead wire (4) and located on one side of the grounding fastening component (11).

2. The substation indoor grounding wire status monitoring system according to claim 1, characterized in that, The mechanical locking unit (2) adopts a blocking tongue structure, including a fixed body (21), a blocking tongue (22), a geared motor, a LoRa communication module, a control module, a power module, and a charging interface. The fixed body (21) has a through hole on one side and is fixedly connected to the lower position of the grounding end (31) of the grounding rod. The blocking tongue (22) is rotatably connected to the fixed body (21). In the closed state, the blocking tongue (22) forms a closed structure with the grounding end (31) of the grounding rod. In the open state, the grounding rod (3) can be normally connected. The geared motor, the LoRa communication module, and the control module are installed inside the fixed body (21). The output shaft of the geared motor is connected to the rotation shaft of the blocking tongue (22). The control module is connected to the geared motor and the LoRa communication module. The power module is connected to the geared motor, the LoRa communication module, and the control module. The charging structure is set on the side of the fixed body (21) and is connected to the power module.

3. The substation indoor grounding wire status monitoring system according to claim 1, characterized in that, The positioning detection unit (1) has a built-in Lora communication module and RFID identification module.

4. The substation indoor grounding wire status monitoring system according to claim 1, characterized in that, The status monitoring unit includes a web terminal and a mobile terminal. The web terminal communicates with the positioning detection unit (1) and the mechanical locking unit (2) through a LoRa communication module. The mobile terminal communicates with the web terminal through 4G / 5G.

5. The substation indoor grounding wire status monitoring system according to claim 1, characterized in that, The grounding fastening assembly (11) is fastened using a threaded knob structure.

6. The substation indoor grounding wire status monitoring system according to claim 2, characterized in that, The control module uses an STM32 series low-power microcontroller.

7. The substation indoor grounding wire status monitoring system according to claim 1, characterized in that, The RFID positioning unit uses an anti-metal RFID electronic tag, which is installed at the fixed position of the grounding terminal bolt of the substation. The identification distance of the anti-metal RFID electronic tag is 3 cm to 5 cm.

8. The substation indoor grounding wire status monitoring system according to claim 2, characterized in that, The power module uses a lithium-ion battery pack, and the charging interface uses a Type-C charging interface.

9. The substation indoor grounding wire status monitoring system according to claim 4, characterized in that, The web interface includes substation management, alarm management, approval management, and system management. The substation management interface stores wiring diagrams for each substation, the alarm management interface stores historical alarm information, the approval interface stores approval information, and the system management interface stores relevant parameter information and configuration information.

10. The substation indoor grounding wire status monitoring system according to claim 4, characterized in that, The mobile app includes a substation interface, a problem record interface, and an approval list interface. The substation interface stores wiring diagrams and grounding wire location diagrams for all substations. The problem record interface records relevant problems. The approval list interface is used to initiate approvals and view corresponding approval records.

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