Method for judging state of portable short-circuit grounding wire

Abstract

The invention discloses a portable short-circuit grounding wire state discrimination method, which collects the state of a portable short-circuit grounding wire by adopting a six-axis sensor at a wire end and a pressure sensor at a grounding end, compares the state with the initial state, and gives alarm information in time when the state change is large, thereby improving the safety guarantee of operation and maintenance personnel. State discrimination is carried out at an edge end, data analysis is processed by adopting edge computing equipment, data return is not needed, network time delay and uncertainty of network transmission are reduced, and real-time performance of alarm information is improved. The method has the characteristics of simplicity and convenience in operation, easiness in implementation and high real-time performance.

Description

Technical Field

[0001] This invention belongs to the field of power operation and maintenance, and relates to a portable short-circuit grounding wire status discrimination method. Specifically, it involves a technology for monitoring power equipment through sensor data acquisition and edge computing data analysis, thereby improving the safety of power operation and maintenance work. Background Technology

[0002] A portable short-circuit grounding wire is a connection device that connects a power transmission line to the ground. It is used to conduct large currents in the power transmission line to the ground and eliminate current conduction in the power transmission line by artificially short-circuiting, thereby preventing electric shock accidents to power operation and maintenance personnel and ensuring their personal safety.

[0003] The portable short-circuit grounding wire is clamped at one end to the transmission line and at the other end to the grounding stake. It is a temporary device and must be removed after maintenance. In practice, improper operation and changes in environmental factors often lead to displacement, loosening, or shaking of the portable short-circuit grounding wire during maintenance. This reduces its grounding effectiveness and prevents it from functioning properly, posing a safety threat to maintenance personnel. Therefore, monitoring the condition of the portable short-circuit grounding wire during maintenance can improve safety.

[0004] A portable short-circuit grounding wire monitoring system and method based on blockchain (publication number CN113109736A) discloses a portable short-circuit grounding wire monitoring system based on blockchain, comprising a grounding wire data acquisition system, a blockchain system, and a management system. Both the grounding wire data acquisition system and the management system are communicatively connected to the blockchain system. The grounding wire data acquisition system is used to collect usage status data of the portable short-circuit grounding wire. The blockchain system is used to encrypt and confirm the usage status data using encryption and consensus algorithms to form blocks, and adds the formed blocks to the blockchain. The management system is used to monitor and display the usage status data stored in the blockchain system. However, the data acquisition system of this invention uses a pressure sensor; therefore, besides pressure, it cannot detect the attitude and status of the portable short-circuit grounding wire, which are important indicators affecting the current-carrying performance of the portable short-circuit grounding wire. Furthermore, the data in this invention is analyzed in a background data center rather than processed on-site, increasing network latency and uncertainty in the network transmission process.

[0005] This invention employs a six-axis sensor at the conductor end and a pressure sensor at the grounding end of the portable short-circuit grounding wire to detect the wire. When the posture and state of the conductor end and grounding end of the portable short-circuit grounding wire change significantly from the initial data, the on-site edge computing device can issue an alarm message to promptly notify maintenance personnel, thus building a safety barrier for maintenance work. Summary of the Invention

[0006] The purpose of this invention is to monitor the attitude and status of a portable short-circuit grounding wire using a six-axis sensor, a pressure sensor, and an edge computing device, and to issue timely alarms when abnormal data occurs, thus providing a safety guarantee for operation and maintenance work.

[0007] To achieve the above objectives, the technical solution adopted by the present invention includes the following steps:

[0008] Step 1. To begin the operation, install the pressure sensor at the grounding terminal of the portable short-circuit grounding wire;

[0009] Step 2. Start the operation by installing the six-axis sensor on the end of the portable short-circuit grounding wire;

[0010] Step 3. The six-axis sensor installed at the end of the portable short-circuit grounding wire is a sensor that includes six measurement data: x-acceleration, y-acceleration, z-acceleration, x-angle, y-angle, and z-angle, which can acquire the state of the end of the portable short-circuit grounding wire.

[0011] Step 4. A pressure sensor installed at the grounding end of the portable short-circuit grounding wire can measure the pressure between the grounding end and the grounding stake;

[0012] Step 5. After installing the six-axis sensor, start monitoring. The value of the six-axis sensor at this time is the initialization data, which is transmitted back to the data analysis device via Bluetooth.

[0013] Step 6. After installing the pressure sensor, start monitoring. The pressure sensor value is the initialization data, which is then transmitted back to the data analysis device via Bluetooth.

[0014] Step 7. The data analysis device is an edge computing device, which is worn by maintenance personnel or placed at the maintenance site;

[0015] Step 8. Continuously acquire and transmit data from the six-axis sensor. The data analysis equipment analyzes the data. If the data remains within the normal range, monitoring continues. If the data exceeds the normal range, an alarm is sent to the maintenance personnel.

[0016] Step 9. Continuously acquire and transmit pressure sensor data. The data analysis equipment analyzes the data. If the data remains within the normal range, monitoring continues. If the data exceeds the normal range, an alarm is sent to the maintenance personnel.

[0017] Step 10. After completing the portable short-circuit grounding wire end monitoring task, remove the six-axis sensor installed at the portable short-circuit grounding wire end;

[0018] Step 11. After completing the monitoring task of the portable short-circuit grounding wire grounding terminal, remove the pressure sensor installed at the grounding terminal of the portable short-circuit grounding wire.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) The present invention uses a six-axis sensor and a pressure sensor; it can acquire the attitude and status data of the conductor end and the grounding end of the portable short-circuit grounding wire respectively, and perform better and more comprehensive monitoring of the portable short-circuit grounding wire;

[0021] (2) The present invention uses edge computing devices to realize data analysis and alarms. It does not require network support or data transmission back to the background. Alarms can be realized on site, which improves the real-time performance of alarms and the stability and reliability of the system. Attached Figure Description

[0022] Figure 1 This is a system block diagram of the present invention;

[0023] Figure 2 This is a flowchart of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Reference Figure 1 and Figure 2 The operation begins with installing a pressure sensor at the grounding end of the portable short-circuit grounding wire; installing a six-axis sensor at the conductor end of the portable short-circuit grounding wire; the six-axis sensor installed at the conductor end of the portable short-circuit grounding wire is a sensor that includes six measurement data: x-acceleration, y-acceleration, z-acceleration, and x-angle, y-angle, and z-angle, which can obtain the state of the conductor end of the portable short-circuit grounding wire; the pressure sensor installed at the grounding end of the portable short-circuit grounding wire can obtain the pressure between the grounding end and the grounding stake.

[0026] When the six-axis sensor is installed, monitoring is started. The six-axis sensor's value is the initialization data, which is transmitted back to the data analysis device via Bluetooth. When the pressure sensor is installed, monitoring is started. The pressure sensor's value is the initialization data, which is also transmitted back to the data analysis device via Bluetooth. The six-axis sensor acquires data every 0.1 seconds, i.e., the sampling frequency is 10Hz; the pressure sensor acquires data every 0.1 seconds, i.e., the sampling frequency is 10Hz.

[0027] The data analysis device is an edge computing device worn by maintenance personnel or placed at the maintenance site. This device is an embedded platform based on a microcontroller, capable of processing and analyzing data. It has a Bluetooth interface to receive data from sensors, and audio and electrical interfaces; it emits flashing lights and alarm sounds when an alarm is triggered.

[0028] The system continuously acquires and transmits data from the six-axis sensors. The data analysis equipment analyzes the data, and if the data remains within the normal range, it continues monitoring; if the data exceeds the normal range, it sends an alarm to the maintenance personnel. Similarly, the system continuously acquires and transmits data from the pressure sensors. The data analysis equipment analyzes the data, and if the data remains within the normal range, it continues monitoring; if the data exceeds the normal range, it sends an alarm to the maintenance personnel.

[0029] Lead wire end data analysis: Using the initialization data of the six-axis sensor as reference data, using vector (x a0 y a0 , z a0 x b0 y b0 , z b0 ) represents the initialization data, where x a0 y a0 , z a0 Let x, y, and z represent the initial values ​​of the accelerations, respectively. b0 y b0 , z b0 These represent the initial values ​​of the x-angle, y-angle, and z-angle, respectively.

[0030] The currently acquired data from the six-axis sensor is (x a y a , z a x b y b , z b ), where x a y a , z a These represent the current values ​​of x-acceleration, y-acceleration, and z-acceleration, respectively. b y b , z b These represent the current values ​​of the x-angle, y-angle, and z-angle, respectively.

[0031] Compare current data with reference data:

[0032]

[0033] Determine s xa s ya s zb s xb syb s zb The size of the value, if one or more of its values ​​exceed a pre-defined threshold T. ij That is, there exists s ij >T ij If i∈{x,y,z) and j∈{a,b}, then a portable short-circuit grounding wire terminal alarm message is issued.

[0034] Grounding terminal data analysis: Using the initial data of the pressure sensor as reference data, the initial data is represented by the scalar p0;

[0035] The current data acquired from the pressure sensor is p;

[0036] Compare current data with reference data:

[0037] s p =|p-p0|

[0038] Determine s p If the size exceeds a pre-defined threshold T, p That is, there exists s p >T p If the alarm is triggered, a warning message will be issued for the grounding terminal of the portable short-circuit grounding wire.

[0039] After the portable short-circuit grounding wire conductor end monitoring task is completed, remove the six-axis sensor installed at the portable short-circuit grounding wire conductor end; after the portable short-circuit grounding wire grounding end monitoring task is completed, remove the pressure sensor installed at the portable short-circuit grounding wire grounding end.

[0040] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and not intended to limit the invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the invention will fall within the scope of the claims.

Claims

1. A portable short-circuit grounding wire status determination method, characterized in that, The implementation steps include the following: (1) At the start of the operation, install a pressure sensor at the grounding end of the portable short-circuit grounding wire; (2) At the start of the operation, install the six-axis sensor on the end of the portable short-circuit grounding wire; (3) The six-axis sensor installed at the end of the portable short-circuit grounding wire is a sensor that includes six measurement data: x-acceleration, y-acceleration, z-acceleration and x-angle, y-angle and z-angle, and can obtain the state of the end of the portable short-circuit grounding wire. (4) A pressure sensor installed at the grounding end of a portable short-circuit grounding wire can obtain the pressure between the grounding end and the grounding stake; (5) When the six-axis sensor is installed, start monitoring. The value of the six-axis sensor at this time is the initial data, which is transmitted back to the data analysis device via Bluetooth. (6) When the pressure sensor is installed, start monitoring. The value of the pressure sensor at this time is the initial data, which is transmitted back to the data analysis device via Bluetooth. (7) The data analysis equipment is an edge computing device, which is worn by maintenance personnel or placed at the maintenance site; (8) Continuously acquire and transmit data from the six-axis sensor. The data analysis equipment analyzes the data. If the data remains within the normal range, it continues to monitor. If the data exceeds the normal range, it sends an alarm to the maintenance personnel. (9) Continuously acquire and transmit data from the pressure sensor. The data analysis equipment analyzes the data. If the data remains within the normal range, it continues to monitor. If the data exceeds the normal range, it sends an alarm to the maintenance personnel. (10) After the portable short-circuit grounding wire end monitoring task is completed, remove the six-axis sensor installed at the portable short-circuit grounding wire end; (11) After the task of monitoring the grounding end of the portable short-circuit grounding wire is completed, remove the pressure sensor installed at the grounding end of the portable short-circuit grounding wire.

2. The method according to claim 1, characterized in that, The monitoring method described in step (5) is that the six-axis sensor acquires data once every 0.1 seconds, that is, the sampling frequency is 10Hz.

3. The method according to claim 1, characterized in that, The monitoring method described in step (6) is that the pressure sensor acquires data once every 0.1 seconds, that is, the sampling frequency is 10Hz.

4. The method according to claim 1, characterized in that, The data analysis device mentioned in step (7) is an embedded platform based on a single-chip microcomputer. It can process and analyze data, has a Bluetooth interface, can receive data sent by sensors, has sound and electrical interfaces, and emits flashing lights and alarm sounds when an alarm is triggered.

5. The method according to claim 1, characterized in that, The data analysis described in step (8) is as follows: (5a) Using the initialization data of the six-axis sensor as reference data, the vector (x a0 ,y a0 , z a0 , x b0 ,y b0 , z b0 ) represents the initialization data, where x a0 ,y a0 , z a0 Let x, y, and z represent the initial values ​​of the accelerations, respectively. b0 ,y b0 , z b0 These represent the initial values ​​of the x-angle, y-angle, and z-angle, respectively. (5b) The currently acquired data from the six-axis sensor is (x a ,y a , z a , x b ,y b , z b ), where x a ,y a , z a These represent the current values ​​of x-acceleration, y-acceleration, and z-acceleration, respectively. b ,y b , z b These represent the current values ​​of the x-angle, y-angle, and z-angle, respectively. (5c) Compare the current data with the reference data: Determine s xa s ya s za s xb s yb s zb The size of the value, if one or more of its values ​​exceed a pre-defined threshold T. ij That is, there exists s ij >T ij If i∈{x,y,z},j∈{a,b}, then a portable short-circuit grounding wire terminal alarm message is issued.

6. The method according to claim 1, characterized in that, The data analysis described in step (9) is as follows: (6a) Using the initial data of the pressure sensor as reference data, the initial data is represented by the scalar p0; (6b) The current data acquired from the pressure sensor is p; (6e) Compare the current data with the reference data: s p =|p-p0| Determine s p If the size exceeds a pre-defined threshold T, p That is, there exists s p >T p If the alarm is triggered, a warning message will be issued for the grounding terminal of the portable short-circuit grounding wire.

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