Power transmission line breakage monitoring method and device based on inertial sensor
By installing inertial sensors on overhead lines to monitor pitch angle and position changes, the problem of difficulty in detecting line breakage faults under light loads in existing technologies has been solved, achieving accurate line breakage monitoring and reducing the impact of power outages.
Patent Information
- Application Number
- CN202410710292.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-12-05
AI Technical Summary
Existing technologies are unable to accurately detect overhead line breakage faults under light load conditions, resulting in greater difficulty in emergency repairs, longer power outage times, and the possibility of the breakage fault triggering the relay protection to malfunction.
An inertial sensor is installed near the clamp on the overhead line. The change in pitch angle and position of the inertial sensor is monitored to determine the occurrence of a line breakage fault.
It enables accurate monitoring of overhead line breakage faults without relying on electrical quantities on both sides of the line, reducing the difficulty of emergency repairs and power outage time, and avoiding malfunctions of relay protection.
Smart Images
Figure CN121069086A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the field of power system relay protection, and relates to an overhead line breakage monitoring method and device based on an inertial sensor. BACKGROUND
[0002] Overhead line breakage is a serious fault that still occurs occasionally, and is difficult to repair and has a long power outage time. The causes of breakage include the following aspects: mechanical reasons, high-temperature melting, and corrosion. In a high-current grounding system, single-phase or two-phase breakage of an overhead line belongs to the open-phase state, which is different from the transverse fault formed by short circuit and belongs to a longitudinal fault. Although breakage is not as serious as short circuit, it has a certain influence on rotating machines and system operation and relay protection. If breakage cannot be effectively removed, the line will be in a non-full-phase operation state, and the negative sequence and zero sequence currents that occur may cause relay protection to overstep, thereby causing the power outage range to expand.
[0003] At present, it is difficult to detect the region where breakage occurs based on electrical quantities on both sides of the line. When breakage occurs, the voltage changes little, and the breakage phase current becomes 0, but if the line is lightly loaded before breakage, it is difficult to distinguish breakage from normal operation. SUMMARY
[0004] The purpose of the application is to overcome the shortcomings of the prior art and provide an overhead line breakage monitoring method based on an inertial sensor, which can accurately monitor overhead line breakage.
[0005] In order to achieve the above purpose, the technical scheme of the application is as follows:
[0006] According to the first aspect of the application, an overhead line breakage monitoring method based on an inertial sensor is provided, a breakage monitoring device is installed on an overhead line near a clamp, and an inertial sensor is installed inside the breakage monitoring device; the pitch angle change value and the position change value are determined by the inertial sensor, so as to determine whether breakage of the overhead line occurs.
[0007] According to some embodiments, the pitch angle change value and the position change value are determined by the inertial sensor, so as to determine whether breakage of the overhead line occurs, specifically including:
[0008] When the overhead line is normally operated without breakage, the initial pitch angle of the inertial sensor is obtained, and the initial position coordinates are set as (0, 0, 0);
[0009] The current pitch angle and the current relative position coordinates of the inertial sensor are obtained in real time;
[0010] The pitch angle change value and the position change value are determined according to the initial pitch angle, the initial position coordinates, the current pitch angle, and the current relative position coordinates;
[0011] According to the pitch angle change value and the position change value, it is determined whether the overhead line has a broken line fault.
[0012] According to some embodiments, the pitch angle change value is |φ1-φ0|, where φ0 is an initial pitch angle and φ1 is a current pitch angle; and the position change value is: (X1, Y1, Z1) is a current relative position coordinate.
[0013] According to some embodiments, the method of determining whether the overhead line has a broken line fault specifically comprises:
[0014] When the pitch angle change value exceeds an angle threshold value and the position change value exceeds a distance threshold value, it is determined that the overhead line has a broken line fault, otherwise it is determined that the overhead line does not have a broken line fault.
[0015] According to some embodiments, the angle threshold value is in a range of 30°-60°.
[0016] According to some embodiments, the distance threshold value is k*S, where k is a coefficient in a range of 0.5-1 and S is a distance between the inertial sensor and the overhead line clamp.
[0017] According to some embodiments, the broken line monitoring device is directly installed on the conductor, and the inertial sensor is fixedly installed in the broken line monitoring device.
[0018] According to a second aspect of the present application, a broken line monitoring device is provided for monitoring a broken line of an overhead line, the broken line monitoring device being installed on the overhead line close to a clamp; an inertial sensor is installed in the broken line monitoring device; the broken line monitoring device determines a pitch angle change value and a position change value through the inertial sensor, thereby determining whether the overhead line has a broken line fault.
[0019] According to some embodiments, the broken line monitoring device further comprises:
[0020] An initial measurement unit is configured to, when the overhead line is in normal operation without a broken line, acquire an initial pitch angle of the inertial sensor during an initialization operation of the broken line monitoring device, and set an initial position coordinate;
[0021] A real-time measurement unit is configured to acquire a current pitch angle and a current relative position coordinate of the inertial sensor in real time;
[0022] A displacement determination unit is configured to determine a pitch angle change value and a position change value according to the initial pitch angle, the initial position coordinate, the current pitch angle and the current relative position coordinate;
[0023] A determination unit is configured to determine whether the overhead line has a broken line fault according to the pitch angle change value and the position change value.
[0024] According to a third aspect of the present application, an electronic device is provided, comprising a processor and a memory, wherein the memory stores a program, and the program can be loaded and executed by the processor to implement the above-mentioned overhead line broken line monitoring method based on an inertial sensor.
[0025] According to a fourth aspect of the present application, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the above-mentioned overhead line broken line monitoring method based on an inertial sensor.
[0026] The application has the following beneficial effects: The technical solution of the present application sets an inertial sensor on an overhead line, thereby realizing the monitoring of the overhead line broken line fault without relying on the electrical quantity on both sides of the line and according to the pitch angle and displacement data of the inertial sensor. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 Fig. 1 is a schematic diagram of the installation of the inertial sensor on the overhead line provided by the embodiment of the present application.
[0028] Figure 2 Fig. 2 is a flowchart of the overhead line broken line monitoring method based on an inertial sensor provided by the embodiment of the present application.
[0029] Figure 3 Fig. 3 is a structural schematic diagram of the broken line monitoring device provided by the embodiment of the present application.
[0030] Figure 4 Fig. 4 is a structural diagram of an electronic device provided by the present application. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below according to the drawings and embodiments. It should be understood that the specific implementation described herein is only used to explain the present application, and does not limit the present application.
[0032] In view of the fact that the current method of detecting the broken line fault based on the electrical quantity on both sides of the line cannot accurately identify the broken line fault under all working conditions. For example, if the line is lightly loaded before the broken line, it is difficult to distinguish the broken line fault from the normal operation according to the electrical quantity. Therefore, the present application proposes a new overhead line broken line detection principle.
[0033] As shown in Fig. 1, the inertial sensor is installed on the overhead line. Figure 1As shown, the broken line monitoring device is installed on the overhead line near the clamp, and the inertial sensor is installed inside the broken line monitoring device. The inertial sensor is a sensor that mainly detects and measures acceleration, inclination, impact, vibration, rotation and multi-degree-of-freedom (DoF) motion, and is an important component for solving navigation, orientation and motion carrier control. The overhead line broken line monitoring method based on the inertial sensor provided by the embodiment of the application determines the pitch angle change value and the position change value through the inertial sensor, so as to determine whether the overhead line has a broken line fault.
[0034] In some embodiments, the broken line monitoring device is directly installed on the conductor, and the inertial sensor is fixedly installed in the broken line monitoring device.
[0035] As Figure 2 The overhead line broken line monitoring method based on the inertial sensor provided by the embodiment of the application is shown, which comprises the following steps:
[0036] S100: When the overhead line is normally running without broken line, the initial pitch angle of the inertial sensor is obtained, and the initial position coordinates are set as (0, 0, 0).
[0037] When the overhead line is normally running without broken line, the initial pitch angle of the inertial sensor is obtained during the initialization running process of the broken line monitoring device, which is denoted as φ0, and the initial position coordinates of the inertial sensor are set as (0, 0, 0). In the subsequent measurement, the relative position coordinates of the inertial sensor relative to the initial position coordinates can be obtained.
[0038] S200: Real-time acquisition of the current pitch angle and the current relative position coordinates of the inertial sensor.
[0039] During the running process after the initialization of the broken line monitoring device, the current pitch angle φ1 and the current relative position coordinates (X1, Y1, Z1) of the inertial sensor are obtained in real time.
[0040] S300: Determining the pitch angle change value and the position change value according to the initial pitch angle, the initial position coordinates, the current pitch angle and the current relative position coordinates.
[0041] The calculation formula of the pitch angle change value is |φ1-φ0|.
[0042] The calculation formula of the position change value is:
[0043] S400: Determining whether the overhead line has a broken line fault according to the pitch angle change value and the position change value.
[0044] In some embodiments, the method for determining whether the overhead line has a broken line fault specifically comprises: determining that the overhead line has a broken line fault when the pitch angle change value exceeds the angle threshold value and the position change value exceeds the distance threshold value, and otherwise determining that the overhead line does not have a broken line fault. Wherein:
[0045] The angle threshold value is in the range of 30°-60°.
[0046] The distance threshold value is k*S; wherein k is a coefficient, and is in the range of 0.5-1, and S is the distance between the inertial sensor and the overhead line clamp.
[0047] In a specific embodiment, the angle threshold value is 45°, and k is 0.5, then:
[0048] Criterion 1: |φ1-φ0|>45°;
[0049] Criterion 2:
[0050] When criterion 1 and criterion 2 are both met, it is determined that the overhead line has a broken line fault; otherwise, it is determined that the overhead line does not have a broken line fault.
[0051] The embodiments of the present application also provide a broken line monitoring device for monitoring a broken line of an overhead line, which is installed on the overhead line close to a clamp; an inertial sensor is installed inside the broken line monitoring device; the broken line monitoring device determines a pitch angle change value and a position change value through the inertial sensor, so as to determine whether the overhead line has a broken line fault.
[0052] Figure 3 The broken line monitoring device 500 provided by the embodiments of the present application is shown, which comprises an inertial sensor 501, an initial measurement unit 502, a real-time measurement unit 503, a displacement determination unit 504, and a determination unit 505. Wherein:
[0053] The initial measurement unit 502 is used to acquire an initial pitch angle of the inertial sensor and set an initial position coordinate in the initialization running process of the broken line monitoring device when the overhead line is normally running without a broken line.
[0054] The real-time measurement unit 503 is used to acquire a current pitch angle and a current relative position coordinate of the inertial sensor in real time.
[0055] The displacement determination unit 504 is used to determine a pitch angle change value and a position change value according to the initial pitch angle, the initial position coordinate, the current pitch angle, and the current relative position coordinate.
[0056] The determination unit 505 is used to determine whether the overhead line has a broken line fault according to the pitch angle change value and the position change value.
[0057] The apparatus performs similar functions to the method provided above, and other functions can be referred to the foregoing description, which will not be repeated here.
[0058] Figure 4 A structural diagram of an electronic device provided by the present application is shown. It includes a processor and a memory. The memory stores computer instructions, when the computer instructions are executed by the processor, the processor executes the computer instructions to achieve the method as described above. Figure 2 The method and refinement scheme shown.
[0059] It should be understood that the above-mentioned apparatus embodiments are only illustrative, and the apparatus disclosed by the present application can also be implemented in other ways. For example, the division of the units / modules described in the above embodiments is only a logical functional division, and actual implementation can have another division manner. For example, multiple units / modules or components can be combined, or can be integrated into another system, or some features can be ignored or not executed.
[0060] In addition, unless otherwise specified, each functional unit / module in each embodiment of the present application can be integrated in one unit / module, or each unit / module can exist physically, or two or more units / modules can be integrated together. The integrated unit / module can be realized in the form of hardware or software program module.
[0061] The integrated unit / module, if realized in the form of hardware, can be a digital circuit, an analog circuit, etc. The physical implementation of the hardware structure includes but is not limited to transistors, memristors, etc. Unless otherwise specified, the processor or chip can be any appropriate hardware processor, such as CPU, GPU, FPGA, DSP, and ASIC, etc. Unless otherwise specified, the on-chip cache, off-chip memory, and memory can be any appropriate magnetic storage medium or magneto-optical storage medium, such as resistive random access memory RRAM (Resistive Random Access Memory), dynamic random access memory DRAM (Dynamic Random Access Memory), static random access memory SRAM (Static Random-Access Memory), enhanced dynamic random access memory EDRAM (Enhanced Dynamic Random Access Memory), high bandwidth memory HBM (High-Bandwidth Memory), hybrid memory cube HMC (Hybrid Memory Cube), etc.
[0062] The integrated unit / module, if implemented in the form of a software program module and sold or used as an independent product, can be stored in a computer readable memory. Based on such understanding, the technical solutions of the present application, essentially or in part, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a memory and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned memory includes various media that can store program codes, such as a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, etc.
[0063] The embodiments of the present application also provide a computer readable storage medium storing a computer program. When the computer program is executed by a processor, the processor performs the method and detailed solutions shown in the method and detailed solutions. Figure 2
[0064] It should be clearly understood that the present application describes how to form and use specific examples, but the present application is not limited to any details of these examples. Instead, based on the teachings of the disclosure, these principles can be applied to many other embodiments.
[0065] In addition, it should be noted that the above figures are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, and are not for limiting purposes. It is easy to understand that the processes shown in the above figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be executed synchronously or asynchronously, for example, in multiple modules.
[0066] The above embodiments are only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made according to the technical idea of the present application on the basis of the technical solutions falls within the protection scope of the present application.
Claims
1. A method of overhead line breakage monitoring based on inertial sensors, characterized in that: The line break monitoring device is installed near the clamp on the overhead line, and an inertial sensor is arranged in the line break monitoring device; the pitch angle change value and the position change value are determined by the inertial sensor, so that whether the overhead line has a line break fault is determined.
2. The method of claim 1, wherein, The method for determining whether the overhead line has a line break fault specifically comprises: When the pitch angle change value exceeds the angle threshold value and the position change value exceeds the distance threshold value, it is determined that the overhead line has a line break fault, otherwise it is determined that the overhead line does not have a line break fault. The angle threshold value is 30°-60°. The distance threshold value is k*S; wherein k is a coefficient, and the value range is 0.5-1, and S is the distance between the inertial sensor and the overhead line clamp. The line break monitoring device is directly installed on the conductor, and the inertial sensor is fixedly installed in the line break monitoring device.
3. The method of claim 2, wherein, The pitch angle change value is |φ1-φ0|, wherein φ0 is an initial pitch angle and φ1 is a current pitch angle; and the position change value is: (X1, Y1, Z1) is a current relative position coordinate.
4. The method according to any one of claims 1 to 3, characterized in that, The line break monitoring device is installed near the clamp on the overhead line, and an inertial sensor is arranged in the line break monitoring device; the pitch angle change value and the position change value are determined by the inertial sensor, so that whether the overhead line has a line break fault is determined. The line break monitoring device further comprises:
5. The method of claim 4, wherein, An initial measurement unit is configured to obtain the initial pitch angle of the inertial sensor and set the initial position coordinate to (0, 0, 0) during the initialization operation of the line break monitoring device when the overhead line is normally operated without line break; 6. The method of claim 4, wherein, A real-time measurement unit is configured to obtain the current pitch angle and the current relative position coordinate of the inertial sensor in real time; 7. The method of claim 1, wherein: A displacement determination unit is configured to determine the pitch angle change value and the position change value according to the initial pitch angle, the initial position coordinate, the current pitch angle and the current relative position coordinate; 8. A broken wire monitoring device for monitoring broken wires of an overhead line, characterized by: A determination unit is configured to determine whether the overhead line has a line break fault according to the pitch angle change value and the position change value.
9. The apparatus of claim 8, wherein, The computer program is executed by the processor to implement the method of any one of claims 1-7. The computer program is executed by the processor to implement the method of any one of claims 1-7. 10. An electronic device, comprising: 11. A computer-readable storage medium storing a computer program, characterized in that,