A substation intelligent grounding line monitoring system and method

Abstract

The application relates to a substation intelligent grounding wire monitoring system and method, and belongs to the technical field of substation intelligent monitoring. A technical scheme: a substation certain grounding pile has an installed grounding wire operation judged by a five-prevention host, a grounding wire reliable grounding condition is judged by a grounding pile screw loosening sensor, and a grounding wire hanging condition on a conductor is judged by a grounding wire clamp pressure sensor; the grounding wire installation state is determined through the above three judgment conditions, and whether the grounding wire exists virtual hanging or missing hanging is continuously monitored until the grounding wire is removed, so that safety accidents caused by virtual hanging or missing hanging of the grounding wire are avoided. The application judges the installation state of the grounding wire through logic, automatically monitors whether an operation and maintenance personnel installs and removes the grounding wire through five-prevention operation, detects whether the sequence of the operation and maintenance personnel installing and removing the grounding wire is correct, and alarms in real time, so that accidents caused by unlocking operation of the operation and maintenance personnel are effectively avoided. The application has very great practical significance for guaranteeing the personal safety of substation operating personnel and the safety of equipment and a power grid.

Description

Technical Field

[0001] This invention relates to a smart grounding wire monitoring system and method for substations, belonging to the field of smart substation monitoring technology. Background Technology

[0002] During maintenance work involving partial power outages at substations, working outside the grounding protection zone is a major cause of electric shock injuries and fatalities. Currently, the main method to prevent accidents is to enforce the use of a microcomputer-based five-proof key to restrict the operation steps of maintenance personnel and strengthen manual supervision. However, microcomputer-based five-proof devices have problems such as being unlocked with a universal key and skipping steps, and cannot guarantee the secure connection of grounding wires, nor can they completely prevent the problem of missing or loose grounding wires. Manual supervision has limitations and cannot monitor the installation status of all grounding wires in real time. There is an urgent need for a technical measure at the work site that can monitor the installation status of grounding wires in real time and issue real-time alarms when missing or loose grounding wires are found. During maintenance work involving partial power outages at substations, inadequate on-site safety measures and problems such as missing or loose grounding wires, leading to workers working outside the grounding protection zone, are the main causes of electric shock injuries and fatalities. The substation's backend monitoring host can only display the location of the grounding switch and cannot monitor the installation status of grounding wires. When the work site is large and many grounding wires are installed, problems such as missing or loose grounding wires cannot be detected in time, creating a significant risk of electric shock for workers.

[0003] Regarding the issue of unmonitored grounding wire installation status in substations, current technologies mainly employ the following methods: First, mandatory use of a five-proof key to ensure correct installation of the grounding wire according to the operating procedures. However, this method cannot confirm whether the grounding wire is securely installed and presents unlocking issues. Second, integrating a GPS positioning module into the grounding wire. However, this method cannot monitor whether the grounding wire is securely installed, and the complex environment within substations makes the accuracy of GPS positioning systems insufficient. Third, using screw loosening sensors to monitor whether the grounding stake is tightened and using pressure sensors to monitor whether the grounding clamp is attached to the conductor to determine whether the grounding wire is installed. However, this method has the potential for false judgments when the grounding wire is not installed, due to tightened grounding bolts or foreign objects on the clamp.

[0004] For the reasons mentioned above, a monitoring system that can monitor the installation status of grounding wires in real time is proposed, which is of great practical significance for ensuring the personal safety of substation workers and the safety of equipment and power grid. Summary of the Invention

[0005] The purpose of this invention is to propose an intelligent grounding wire monitoring system and method for substations. By using three judgment conditions—operation information from the five-prevention system, a grounding stake screw loosening sensor, and a grounding wire clamp pressure sensor—the system determines the grounding wire installation status and achieves real-time monitoring of the grounding wire installation status. This effectively avoids safety accidents caused by loose grounding wires, missed grounding wires, or unlocking operations, ensuring the personal safety of substation workers and the safety of equipment and the power grid, and preventing accidents caused by unlocking operations by maintenance personnel.

[0006] The technical solution of this invention is: A method for monitoring intelligent grounding wires in substations involves using a five-prevention host to determine if a grounding wire has been installed on a grounding stake in the substation, using a grounding stake screw looseness sensor to determine the reliability of the grounding wire's grounding, and using a grounding wire clamp pressure sensor to determine the connection status of the grounding wire to the conductor. The method determines the installation status of the grounding wire based on these three criteria and continuously monitors for any loose or missing grounding wires until the grounding wire is removed, thus preventing safety accidents caused by loose or missing grounding wires.

[0007] Specifically, this includes: installing a grounding clamp pressure sensor on the grounding wire clamp to determine whether the grounding wire is securely attached to the conductor; installing a screw loosening sensor on the bolt of the grounding stake to determine whether the grounding wire is reliably grounded; installing a communication module on the grounding wire and grounding stake to communicate in real time with the substation intelligent grounding wire monitoring system; and maintaining real-time communication between the five-prevention host and the substation intelligent grounding wire monitoring system. When maintenance personnel simulate the installation of a grounding wire at a certain location in the substation on the five-prevention host, the substation intelligent grounding wire monitoring system detects that the grounding stake screws are tightened, the grounding wire clamp is engaged, and receives the five-prevention key operation completion feedback information, determining that the grounding wire is securely installed, and marks the grounding wire in green on the substation intelligent grounding wire monitoring system; when the substation intelligent grounding wire monitoring system does not receive the five-prevention host simulating the removal of a grounding wire at a certain location, but detects a drop in clamp pressure or loosening of the grounding bolt on the installed grounding wire, it determines that the grounding wire is loosely engaged, marks the grounding wire in red on the substation intelligent grounding wire monitoring system, and issues an alarm.

[0008] The specific operating steps are as follows: Step 1: Store the serial numbers and addresses of all grounding wires and grounding stakes in the substation into the substation intelligent grounding wire monitoring system; Step 2: Install communication modules on the grounding wire and grounding stake to upload the status of the grounding stake and grounding wire to the substation intelligent grounding wire monitoring system in real time; the five-prevention host communicates with the substation intelligent grounding wire monitoring system in real time to upload the simulated operation process and the five-prevention key feedback operation information. Step 3: The tightness status signal of the grounding stake screw loosening sensor is uploaded to the substation intelligent grounding wire monitoring system through the communication module; the connection status signal of the grounding wire clamp pressure sensor is uploaded to the substation intelligent grounding wire monitoring system through the communication module; the substation intelligent grounding wire monitoring system determines the installation position and installation status of the grounding wire based on the information uploaded by the five-prevention host and the information uploaded by all sensors. Step 4: When the substation intelligent grounding wire monitoring system receives the following information in sequence: the five-prevention host simulates the installation of a grounding wire at a certain location in the substation; the grounding pile grounding bolt is in a tightened state; the grounding wire clamp is in a hooked state; the five-prevention key returns the information that the grounding wire has been installed; then it is determined that the grounding wire has been firmly installed, and the grounding wire is marked green on the substation intelligent grounding wire monitoring system. Step 5: After determining that the grounding wire is securely installed, the substation intelligent grounding wire monitoring system monitors the installation status of the grounding wire in real time. When the substation intelligent grounding wire monitoring system does not receive the information from the five-prevention host simulating the removal of the grounding wire, but receives information that the grounding pile bolt is not tightened or the grounding wire clamp is not connected, it determines that the grounding wire is not securely installed, marks the grounding wire in red on the substation intelligent grounding wire monitoring system, and issues an alarm. Step Six: When the substation intelligent grounding wire monitoring system receives the following information in sequence: the five-prevention host simulates the removal of a grounding wire at a certain point in the substation; the grounding wire clamp is not connected; the grounding pile bolt is loose; the five-prevention key returns information that the grounding wire has been removed; then it is determined that the grounding wire has been removed, and the grounding wire icon is deleted on the substation intelligent grounding wire monitoring system.

[0009] A substation intelligent grounding wire monitoring system includes an intelligent grounding wire, an intelligent grounding stake, a communication module, a substation intelligent grounding wire monitoring host, a five-proof host, and a five-proof key. The substation intelligent grounding wire monitoring host is used to implement the aforementioned substation intelligent grounding wire monitoring method. The intelligent grounding wire wirelessly communicates with the substation intelligent grounding wire monitoring host through the communication module, transmitting the intelligent grounding wire number, address, and connection status to the substation intelligent grounding wire monitoring host. The intelligent grounding stake wirelessly communicates with the substation intelligent grounding wire monitoring host through the communication module, transmitting the intelligent grounding stake number, address, and whether the grounding wire is reliably grounded to the substation intelligent grounding wire monitoring host. The communication module is responsible for wireless communication between the intelligent grounding wire and the substation intelligent grounding wire monitoring host, and between the intelligent grounding stake and the substation intelligent grounding wire monitoring host. The five-proof host uploads simulated operations by operators to the substation intelligent grounding wire monitoring host. The five-proof key transmits grounding wire installation information back to the substation intelligent grounding wire monitoring host for the judgment module to determine whether the grounding wire is securely installed.

[0010] The intelligent grounding wire is equipped with a grounding wire number and address, as well as a grounding wire clamp pressure sensor module; the grounding wire number and address are used to distinguish different intelligent grounding wires; the grounding wire clamp pressure sensor module identifies whether the grounding wire is securely attached to the conductor.

[0011] The intelligent grounding stake is equipped with a grounding stake number and address, as well as a screw loosening sensor module; the grounding stake number and address are used to distinguish different intelligent grounding stakes; the screw loosening sensor module identifies whether the grounding wire is reliably grounded.

[0012] The substation intelligent grounding wire monitoring host includes a storage module, a discrimination module, and a display module. The storage module stores simulated grounding wire installation and removal information, intelligent grounding stakes, and intelligent grounding wire status in real time. The discrimination module collects information from the storage module to determine the actual grounding wire installation location and status on site. When no grounding wire is connected, the display module normally displays the substation system wiring diagram. After a grounding wire is connected, the discrimination module marks firmly installed grounding wires as green and not firmly installed grounding wires as red.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The intelligent grounding pile, intelligent grounding wire and five-proof host of the present invention communicate in real time. By logically judging the installation status of the grounding wire, it can automatically monitor whether the maintenance personnel install or remove the grounding wire through the five-proof operation; effectively avoid safety accidents caused by the grounding wire being falsely hung, missing, or unlocked.

[0014] (2) Intelligent grounding pile status monitoring is achieved by installing screw loosening sensors and communication modules, and the grounding pile status is uploaded to the substation intelligent grounding wire monitoring system in real time; intelligent grounding wire status monitoring is achieved by installing grounding wire clamp pressure sensors and communication modules, and the grounding wire status is uploaded to the substation intelligent grounding wire monitoring system in real time. Compared with integrating GPS into the grounding wire, it is more stable and is not affected by geographical factors. The substation intelligent grounding wire monitoring system monitors the installation, removal, and connection status of the grounding wire and whether it has passed the five-proof operation through the grounding wire, grounding pile status and five-proof host information. It has great practical significance for ensuring the personal safety of substation workers and the safety of equipment and power grid.

[0015] (3) The substation intelligent grounding wire monitoring system can determine whether the operation and maintenance personnel have installed and removed the grounding wire through the five-prevention operation, and can detect whether the operation and maintenance personnel have installed and removed the grounding wire in the correct order, and issue an alarm in real time, effectively preventing the operation and maintenance personnel from having accidents due to unlocking operations. Attached Figure Description

[0016] Figure 1 This is a system flowchart of an embodiment of the present invention; Figure 2This is a schematic diagram illustrating the determination of the grounding wire installation time sequence according to an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the sequence of grounding wire removal according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the process of an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] A method for monitoring intelligent grounding wires in substations involves using a five-prevention host to determine if a grounding wire has been installed on a grounding stake in the substation, using a grounding stake screw looseness sensor to determine the reliability of the grounding wire's grounding, and using a grounding wire clamp pressure sensor to determine the connection status of the grounding wire to the conductor. The method determines the installation status of the grounding wire based on these three criteria and continuously monitors for any loose or missing grounding wires until the grounding wire is removed, thus preventing safety accidents caused by loose or missing grounding wires.

[0019] Specifically, this includes: installing a grounding clamp pressure sensor on the grounding wire clamp to determine whether the grounding wire is securely attached to the conductor; installing a screw loosening sensor on the bolt of the grounding stake to determine whether the grounding wire is reliably grounded; installing a communication module on the grounding wire and grounding stake to communicate in real time with the substation intelligent grounding wire monitoring system; and maintaining real-time communication between the five-prevention host and the substation intelligent grounding wire monitoring system. When maintenance personnel simulate the installation of a grounding wire at a certain location in the substation on the five-prevention host, the substation intelligent grounding wire monitoring system detects that the grounding stake screws are tightened, the grounding wire clamp is engaged, and receives the five-prevention key operation completion feedback information, determining that the grounding wire is securely installed, and marks the grounding wire in green on the substation intelligent grounding wire monitoring system; when the substation intelligent grounding wire monitoring system does not receive the five-prevention host simulating the removal of a grounding wire at a certain location, but detects a drop in clamp pressure or loosening of the grounding bolt on the installed grounding wire, it determines that the grounding wire is loosely engaged, marks the grounding wire in red on the substation intelligent grounding wire monitoring system, and issues an alarm.

[0020] The specific operating steps are as follows: Step 1: Store the serial numbers and addresses of all grounding wires and grounding stakes in the substation into the substation intelligent grounding wire monitoring system; Step 2: Install communication modules on the grounding wire and grounding stake to upload the status of the grounding stake and grounding wire to the substation intelligent grounding wire monitoring system in real time; the five-prevention host communicates with the substation intelligent grounding wire monitoring system in real time to upload the simulated operation process and the five-prevention key feedback operation information. Step 3: The tightness status signal of the grounding stake screw loosening sensor is uploaded to the substation intelligent grounding wire monitoring system through the communication module; the connection status signal of the grounding wire clamp pressure sensor is uploaded to the substation intelligent grounding wire monitoring system through the communication module; the substation intelligent grounding wire monitoring system determines the installation position and installation status of the grounding wire based on the information uploaded by the five-prevention host and the information uploaded by all sensors. Step 4: When the substation intelligent grounding wire monitoring system receives the following information in sequence: the five-prevention host simulates the installation of a grounding wire at a certain location in the substation; the grounding pile grounding bolt is in a tightened state; the grounding wire clamp is in a hooked state; the five-prevention key returns the information that the grounding wire has been installed; then it is determined that the grounding wire has been firmly installed, and the grounding wire is marked green on the substation intelligent grounding wire monitoring system. Step 5: After determining that the grounding wire is securely installed, the substation intelligent grounding wire monitoring system monitors the installation status of the grounding wire in real time. When the substation intelligent grounding wire monitoring system does not receive the information from the five-prevention host simulating the removal of the grounding wire, but receives information that the grounding pile bolt is not tightened or the grounding wire clamp is not connected, it determines that the grounding wire is not securely installed, marks the grounding wire in red on the substation intelligent grounding wire monitoring system, and issues an alarm. Step Six: When the substation intelligent grounding wire monitoring system receives the following information in sequence: the five-prevention host simulates the removal of a grounding wire at a certain point in the substation; the grounding wire clamp is not connected; the grounding pile bolt is loose; the five-prevention key returns information that the grounding wire has been removed; then it is determined that the grounding wire has been removed, and the grounding wire icon is deleted on the substation intelligent grounding wire monitoring system.

[0021] A substation intelligent grounding wire monitoring system includes an intelligent grounding wire, an intelligent grounding stake, a communication module, a substation intelligent grounding wire monitoring host, a five-proof host, and a five-proof key. The substation intelligent grounding wire monitoring host is used to implement the aforementioned substation intelligent grounding wire monitoring method. The intelligent grounding wire wirelessly communicates with the substation intelligent grounding wire monitoring host through the communication module, transmitting the intelligent grounding wire number, address, and connection status to the substation intelligent grounding wire monitoring host. The intelligent grounding stake wirelessly communicates with the substation intelligent grounding wire monitoring host through the communication module, transmitting the intelligent grounding stake number, address, and whether the grounding wire is reliably grounded to the substation intelligent grounding wire monitoring host. The communication module is responsible for wireless communication between the intelligent grounding wire and the substation intelligent grounding wire monitoring host, and between the intelligent grounding stake and the substation intelligent grounding wire monitoring host. The five-proof host uploads simulated operations by operators to the substation intelligent grounding wire monitoring host. The five-proof key transmits grounding wire installation information back to the substation intelligent grounding wire monitoring host for the judgment module to determine whether the grounding wire is securely installed.

[0022] The intelligent grounding wire is equipped with a grounding wire number and address, as well as a grounding wire clamp pressure sensor module; the grounding wire number and address are used to distinguish different intelligent grounding wires; the grounding wire clamp pressure sensor module identifies whether the grounding wire is securely attached to the conductor.

[0023] The intelligent grounding stake is equipped with a grounding stake number and address, as well as a screw loosening sensor module; the grounding stake number and address are used to distinguish different intelligent grounding stakes; the screw loosening sensor module identifies whether the grounding wire is reliably grounded.

[0024] The substation intelligent grounding wire monitoring host includes a storage module, a discrimination module, and a display module. The storage module stores simulated grounding wire installation and removal information, intelligent grounding stakes, and intelligent grounding wire status in real time. The discrimination module collects information from the storage module to determine the actual grounding wire installation location and status on site. When no grounding wire is connected, the display module normally displays the substation system wiring diagram. After a grounding wire is connected, the discrimination module marks firmly installed grounding wires as green and not firmly installed grounding wires as red.

[0025] In this embodiment, the more specific steps are as follows: Step 1: Store the serial numbers and addresses of all grounding wires and grounding stakes in the substation into the substation intelligent grounding wire monitoring system.

[0026] 101. All grounding wires in the station have their own addresses and numbers, such as "01". Store the grounding wire addresses in the substation intelligent grounding wire monitoring backend storage module.

[0027] 102. All grounding piles in the station have their own addresses and numbers, such as "111-17". Store the grounding pile addresses in the substation's intelligent grounding wire monitoring backend storage module.

[0028] Step 2: Install communication modules on the grounding wire and grounding stake to upload the status of the grounding stake and grounding wire to the substation intelligent grounding wire monitoring system in real time; the five-prevention host communicates with the substation intelligent grounding wire monitoring system in real time to upload the simulated operation process and the five-prevention key feedback operation information.

[0029] 201. The grounding wire and grounding stake communicate in real time with the substation's intelligent grounding wire monitoring backend, uploading their numbers and status to the monitoring backend.

[0030] 202. The five-proof host communicates in real time with the substation intelligent grounding wire monitoring system, uploading the information of the five-proof host's simulated operation and the five-proof key's feedback to the monitoring backend.

[0031] 203. The substation intelligent grounding wire monitoring system can identify the number and status of each grounding stake and grounding wire, and can receive simulated operation information from the five-prevention host and operation information returned by the five-prevention key.

[0032] Step 3: The tightness signal of the grounding stake screw loosening sensor is uploaded to the substation intelligent grounding wire monitoring system through the communication module; the connection status signal of the grounding wire clamp pressure sensor is uploaded to the substation intelligent grounding wire monitoring system through the communication module; the substation intelligent grounding wire monitoring system determines the installation position and status of the grounding wire based on the information uploaded by the five-prevention host and the information uploaded by all sensors.

[0033] 301. A screw loosening sensor is installed on the bolt of the grounding stake. The bolt tightness status is transmitted back to the substation's intelligent grounding wire monitoring system via a communication module. When the screw loosening sensor experiences pressure greater than a certain value, it sends a message to the substation's intelligent grounding wire monitoring system via the communication device, such as "111-17 Grounding stake screw is now in a tight state." When the screw loosening sensor experiences pressure less than a certain value, it sends a message to the substation's intelligent grounding wire monitoring system via the communication device, such as "111-17 Grounding stake screw is now in a loose state."

[0034] 302. A grounding clamp pressure sensor is installed on the grounding clamp. The grounding clamp connection status is transmitted back to the substation's intelligent grounding monitoring system via a communication module. When the grounding clamp pressure sensor experiences pressure exceeding a certain value, it sends a message to the substation's intelligent grounding monitoring system via the communication device, such as "Grounding clamp No. 01 is connected." When the pressure is below a certain value, it sends a message to the substation's intelligent grounding monitoring system via the communication device, such as "Grounding clamp No. 01 is not connected."

[0035] 303. The substation intelligent grounding wire monitoring system determines the actual installation location and status of the grounding wire on site by simulating the grounding wire installation and removal information and the corresponding grounding stake and grounding wire status through the five-proof host. For example, if the substation intelligent grounding wire monitoring system receives the following information sequentially from the five-proof host simulating the hanging of grounding wire No. 01 at position 111-17, the grounding bolt at 111-17 becoming tightened, the clamp for grounding wire No. 01 becoming connected, and the five-proof key transmitting the information that grounding wire No. 01 has been installed, then it is determined that grounding wire No. 01 has been securely installed at position 111-17 through the five-proof operation.

[0036] Step 4: When the substation intelligent grounding wire monitoring system receives the following information in sequence: the five-prevention host simulates the installation of a grounding wire at a certain location in the substation; the grounding pile bolt is in a tightened state; the grounding wire clamp is in a connected state; the five-prevention key returns information indicating that the grounding wire has been installed, it is determined that the grounding wire has been securely installed, and the grounding wire is marked green on the substation intelligent grounding wire monitoring system.

[0037] 401. When maintenance personnel simulate the installation of a grounding wire at a certain location on the five-prevention host, the five-prevention host will send information about the simulated grounding wire installation at that location in the substation to the substation intelligent grounding wire monitoring system, such as "t "1. The five-time protection host simulates ground wire 01, which is installed at grounding stake 111-17."

[0038] 402. After the five-prevention simulation operation, when the substation intelligent grounding wire monitoring system sequentially receives information such as the grounding bolt at the simulated grounding wire installation location becoming tightened, the grounding wire clamp becoming connected, and the five-prevention key transmitting information indicating that the grounding wire installation operation has been completed, such as " t "2. The grounding bolt became tightened at 11:11-17". t "Time 01 grounding wire clamp is in the connected state" t If the message "The installation of grounding wire 01 at grounding stake 111-7 has been completed" is received via the 4-time five-prevention key feedback, then it is determined that grounding wire 01 has been correctly installed at position 111-17 and is securely fastened. This grounding wire will be marked green on the substation's intelligent grounding wire monitoring system. The order of grounding wire installation time is as follows: Figure 2 . 、 403. After the five-prevention simulation operation, when the substation intelligent grounding wire monitoring system sequentially receives information such as the simulated grounding wire clamp changing to the connected state, the grounding bolt at the grounding wire changing to the tightened state, and the five-prevention key returning information indicating that the grounding wire installation operation has been completed, such as " t "Time 01 grounding wire clamp is in the connected state" t "3. Time 111-17: The grounding bolt becomes tightened" t If the message "4-time five-proof key feedback indicates that the installation of grounding wire No. 01 at grounding stake 111-7 has been completed" is received, it means that grounding wire No. 01 has been installed at position 111-17 and is securely fastened. However, if the maintenance personnel installed the grounding wire in the wrong order, the grounding wire will be marked green on the substation intelligent grounding wire monitoring system, and an "incorrect grounding wire installation order alarm" will be issued.

[0039] 404. When the substation intelligent grounding wire monitoring system receives the five-prevention host's simulated grounding wire installation information, such as " t If the host simulates that the grounding wire No. 01 is installed at the grounding stake 111-17, but does not receive the messages "the grounding bolt 111-17 is tightened" or "the grounding wire clamp No. 01 is connected", it is determined that the maintenance personnel have not yet started the operation.

[0040] 405. When the substation intelligent grounding wire monitoring system receives the five-prevention host's simulated grounding wire installation information, such as " t After the five-time protection host simulated ground wire 01 was installed at grounding stake 111-17, but " t If only one of the two messages is received, "The grounding bolt is tightened or the No. 01 grounding wire clamp is connected," it is determined that the maintenance personnel are installing the grounding wire.

[0041] 406. When the substation intelligent grounding wire monitoring system receives a message indicating that the grounding bolt at the simulated grounding wire installation point has become tightened and the grounding wire clamp has become connected, but does not receive a message from the five-proof key indicating that the grounding wire installation operation is complete, if only " t "1. The time-protection host simulates ground wire 01 installed at grounding stake 111-17". t "2. The grounding bolt became tightened at 11:11-17". t If the grounding wire clamp for time 01 is in the "connected state" and no operation completion information is received from the five-proof key, it is determined to be a sensor false alarm, or that the maintenance personnel did not use the five-proof key, or that the maintenance personnel have completed the normal operation but have not yet returned to the five-proof host in the main control room to report the operation information. At this time, the grounding wire will be marked orange and flashing on the substation intelligent grounding wire monitoring system.

[0042] 407. If the substation intelligent grounding wire monitoring system does not receive simulated grounding wire installation information from the five-prevention host, but receives information such as "111-17 grounding bolt is in a tightened state" or "01 grounding wire clamp is in a connected state," it is determined that the sensor is falsely reporting or someone has not used the five-prevention grounding wire installation. The system issues an alarm to remind maintenance personnel to verify on-site.

[0043] Step 5: After determining that the grounding wire is securely installed, the substation intelligent grounding wire monitoring system monitors the installation status of the grounding wire in real time. When the substation intelligent grounding wire monitoring system does not receive information from the five-prevention host simulating the removal of the grounding wire, but receives information that the grounding pile bolt is not tightened or the grounding wire clamp is not connected, it determines that the grounding wire is not securely installed, marks the grounding wire in red on the substation intelligent grounding wire monitoring system, and issues an alarm.

[0044] 501. When a certain grounding wire is marked green on the substation intelligent grounding wire monitoring system, such as "Grounding wire No. 01 has been firmly connected to position 111-17", the monitoring backend will start to continuously monitor the installation status of grounding wire No. 01.

[0045] 502. If the substation intelligent grounding wire monitoring system does not receive the "simulated removal of grounding wire No. 01 at grounding pile 111-17" information uploaded by the five-prevention system, but receives "the grounding bolt of 111-17 has become loose" or "the grounding wire clamp of No. 01 has become unconnected", it is determined that the grounding wire is loosely connected. The substation intelligent grounding wire monitoring system will mark the grounding wire in red and issue an alarm.

[0046] Step Six: When the substation intelligent grounding wire monitoring system receives the following information in sequence: the five-prevention host simulates the removal of a grounding wire at a certain point in the substation; the grounding wire clamp is not connected; the grounding pile bolt is loose; the five-prevention key returns information that the grounding wire has been removed; then it is determined that the grounding wire has been removed, and the grounding wire icon is deleted on the substation intelligent grounding wire monitoring system.

[0047] 601. If the substation intelligent grounding wire monitoring system receives a signal from the five-prevention system, t After the host computer simulates the removal of ground wire No. 01 at grounding pile 111-17, it receives the following messages in sequence: t "Time 01 grounding wire clamp becomes unconnected" t "3. The grounding bolt became loose between 111 and 17." t If the five-times key transmits the message "Removal of grounding wire No. 01 has been completed," then it is determined that the grounding wire has been removed, and its icon is deleted from the substation's intelligent grounding wire monitoring system. The order of determining the grounding wire removal time is as follows: Figure 3 .

[0048] 602. If the substation intelligent grounding wire monitoring system receives a signal from the five-prevention system, t After the host computer simulates the removal of ground wire No. 01 at grounding pile 111-17, it receives the following messages in sequence: t "2. The grounding bolt became loose between 111 and 17:00". t "At time 3, the grounding wire clamp No. 01 changed to an unconnected state". t If the five-time key transmits the message "The operation to remove grounding wire No. 01 has been completed", it is determined that the grounding wire has been removed. However, if the maintenance personnel made a mistake in the order of the grounding wire installation, the grounding wire icon will be deleted from the substation intelligent grounding wire monitoring system and an "Incorrect grounding wire removal operation sequence alarm" will be issued.

[0049] 603. If the substation intelligent grounding wire monitoring system receives the information "the five-prevention host simulates the removal of grounding wire No. 01 at grounding pile 111-17" uploaded by the five-prevention system, but does not receive the information "the grounding wire clamp No. 01 becomes unattached" and "the grounding bolt 111-17 becomes loose", it is determined that the operation has not yet started.

[0050] 604. If the substation intelligent grounding wire monitoring system receives the simulated "removal of grounding wire No. 01 at grounding stake 111-17" information from the five-prevention system, but only receives one of the two information "grounding wire clamp No. 01 becomes unconnected" or "grounding bolt 111-17 becomes loose", it is determined that the maintenance personnel are removing the grounding wire or the grounding wire is loose, and the grounding wire is marked orange and flashed.

[0051] 605. If the substation intelligent grounding wire monitoring system receives the simulated "removal of grounding wire No. 01 at grounding stake 111-17" information from the five-prevention system and then receives "grounding wire clamp No. 01 becomes unconnected" and "grounding bolt 111-17 becomes loose", but does not receive the operation information of grounding wire No. 01 being removed from the five-prevention key, then it is determined that the grounding wire is loose, or the maintenance personnel did not use the five-prevention key to operate, or the maintenance personnel have completed the operation but have not yet returned the information, and the grounding wire is marked orange and flashed.

[0052] The flowchart of the substation intelligent grounding wire monitoring system judgment process is as follows: Figure 4 As shown, the example is to install grounding wire No. 01 on grounding stake No. 111-17.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for monitoring intelligent grounding wires in substations, characterized in that: The five-prevention host determines whether a grounding stake in a substation has been installed with a grounding wire, uses a grounding stake screw looseness sensor to determine the reliability of the grounding wire, and uses a grounding wire clamp pressure sensor to determine the connection of the grounding wire to the conductor. Based on these three judgment conditions, the installation status of the grounding wire is determined, and the grounding wire is continuously monitored for any loose or missing connections until it is removed, in order to avoid safety accidents caused by loose or missing grounding wire connections.

2. The intelligent grounding wire monitoring method for substations according to claim 1, characterized in that... Specifically, this includes: installing a grounding clamp pressure sensor on the grounding wire clamp to determine whether the grounding wire is securely attached to the conductor; installing a screw loosening sensor on the bolt of the grounding stake to determine whether the grounding wire is reliably grounded; installing a communication module on the grounding wire and grounding stake to communicate in real time with the substation intelligent grounding wire monitoring system; and maintaining real-time communication between the five-prevention host and the substation intelligent grounding wire monitoring system. When maintenance personnel simulate the installation of a grounding wire at a certain location in the substation on the five-prevention host, the substation intelligent grounding wire monitoring system detects that the grounding stake screws are tightened, the grounding wire clamp is engaged, and receives the five-prevention key operation completion feedback information, determining that the grounding wire is securely installed, and marks the grounding wire in green on the substation intelligent grounding wire monitoring system; when the substation intelligent grounding wire monitoring system does not receive the five-prevention host simulating the removal of a grounding wire at a certain location, but detects a drop in clamp pressure or loosening of the grounding bolt on the installed grounding wire, it determines that the grounding wire is loosely engaged, marks the grounding wire in red on the substation intelligent grounding wire monitoring system, and issues an alarm.

3. The intelligent grounding wire monitoring method for substations according to claim 2, characterized in that... The specific operating steps are as follows: Step 1: Store the serial numbers and addresses of all grounding wires and grounding stakes in the substation into the substation intelligent grounding wire monitoring system; Step 2: Install communication modules on the grounding wire and grounding stake to upload the status of the grounding stake and grounding wire to the substation intelligent grounding wire monitoring system in real time; the five-prevention host communicates with the substation intelligent grounding wire monitoring system in real time to upload the simulated operation process and the five-prevention key feedback operation information. Step 3: The tightness status signal of the grounding stake screw loosening sensor is uploaded to the substation intelligent grounding wire monitoring system through the communication module; the connection status signal of the grounding wire clamp pressure sensor is uploaded to the substation intelligent grounding wire monitoring system through the communication module; the substation intelligent grounding wire monitoring system determines the installation position and installation status of the grounding wire based on the information uploaded by the five-prevention host and the information uploaded by all sensors. Step 4: When the substation intelligent grounding wire monitoring system receives the following information in sequence: the five-prevention host simulates the installation of a grounding wire at a certain location in the substation; the grounding pile grounding bolt is in a tightened state; the grounding wire clamp is in a hooked state; the five-prevention key returns the information that the grounding wire has been installed; then it is determined that the grounding wire has been firmly installed, and the grounding wire is marked green on the substation intelligent grounding wire monitoring system. Step 5: After determining that the grounding wire is securely installed, the substation intelligent grounding wire monitoring system monitors the installation status of the grounding wire in real time. When the substation intelligent grounding wire monitoring system does not receive the information from the five-prevention host simulating the removal of the grounding wire, but receives information that the grounding pile bolt is not tightened or the grounding wire clamp is not connected, it determines that the grounding wire is not securely installed, marks the grounding wire in red on the substation intelligent grounding wire monitoring system, and issues an alarm. Step Six: When the substation intelligent grounding wire monitoring system receives the following information in sequence: the five-prevention host simulates the removal of a grounding wire at a certain point in the substation; the grounding wire clamp is not connected; the grounding pile bolt is loose; the five-prevention key returns information that the grounding wire has been removed; then it is determined that the grounding wire has been removed, and the grounding wire icon is deleted on the substation intelligent grounding wire monitoring system.

4. A substation intelligent grounding wire monitoring system, characterized in that: The system includes a smart grounding wire, a smart grounding stake, a communication module, a substation smart grounding wire monitoring host, a five-proof host, and a five-proof key. The substation smart grounding wire monitoring host is used to implement the substation smart grounding wire monitoring method according to any one of claims 1-3. The smart grounding wire communicates wirelessly with the substation smart grounding wire monitoring host through the communication module, transmitting the smart grounding wire number, address, and connection status to the substation smart grounding wire monitoring host. The smart grounding stake communicates wirelessly with the substation smart grounding wire monitoring host through the communication module, transmitting the smart grounding stake number, address, and whether the grounding wire is reliably grounded to the substation smart grounding wire monitoring host. The communication module is responsible for wireless communication between the smart grounding wire and the substation smart grounding wire monitoring host, and between the smart grounding stake and the substation smart grounding wire monitoring host. The five-proof host uploads simulated operations by operators to the substation smart grounding wire monitoring host. The five-proof key transmits grounding wire installation information back to the substation smart grounding wire monitoring host for the judgment module to determine whether the grounding wire is securely installed.

5. The intelligent grounding wire monitoring system for substations according to claim 4, characterized in that: The intelligent grounding wire is equipped with a grounding wire number and address, as well as a grounding wire clamp pressure sensor module; the grounding wire number and address are used to distinguish different intelligent grounding wires; the grounding wire clamp pressure sensor module identifies whether the grounding wire is securely attached to the conductor.

6. The intelligent grounding wire monitoring system for substations according to claim 4, characterized in that: The intelligent grounding stake is equipped with a grounding stake number and address, as well as a screw loosening sensor module; the grounding stake number and address are used to distinguish different intelligent grounding stakes; the screw loosening sensor module identifies whether the grounding wire is reliably grounded.

7. The intelligent grounding wire monitoring system for substations according to claim 4, characterized in that: The substation intelligent grounding wire monitoring host includes a storage module, a discrimination module, and a display module; the storage module stores the simulated grounding wire installation and removal information, intelligent grounding stakes, and intelligent grounding wire status in real time; the discrimination module collects the information in the storage module to determine the actual grounding wire installation location and installation status on site; When no grounding wire is connected, the display module normally displays the substation system wiring diagram. After a grounding wire is connected, the judgment module marks the firmly installed grounding wire as green and the unsecured grounding wire as red.

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