CN111159633A - Power transmission line channel windage yaw calculating device - Google Patents
Power transmission line channel windage yaw calculating device Download PDFInfo
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Abstract
The invention relates to a device for calculating windage yaw of a channel of a power transmission line, and belongs to the technical field of calculation of windage yaw of the power transmission line. The calculating device comprises a shell, a data acquisition module, a data display module, a wire self-weight specific load g1 calculating module, a wire maximum wind time ice-free wind pressure specific load g4 calculating module, a tangent tower consideration suspension insulator string wind deflection calculating module, a tension tower gear internal wind deflection calculating module and a suspension insulator string wind pressure Pz calculating module; the parameter data required in the calculation process are uniformly recorded through the data acquisition module and are transmitted to the memories of all the modules for storage, when the functions of a certain module are required to be used, the corresponding module is selected through the input module and input is carried out, meanwhile, the input information is displayed and output on the display of the display module, and the input information is assisted through voice if necessary, so that errors are prevented. Each module central processor integrates the required processing operations.
Description
Technical Field
The invention belongs to the technical field of electric power auxiliary equipment, and particularly relates to a wind deflection calculating device for a power transmission line channel.
Background
In the process of power supply, to ensure the reliability of power supply, the safe and stable operation of the power transmission line needs to be ensured at first, and the power transmission line needs to have enough safe distance with trees, buildings and the like. In recent years, the phenomena of illegal building and afforestation in a transmission line channel are prominent, and when the transmission line channel meets a strong wind climate, the wind deflection angle of a wire is increased, the dangerous space range is increased, and the stable operation of the transmission line is seriously threatened. In order to eliminate hidden danger of a channel and ensure reliable power supply, the current transmission line not only meets the vertical distance of a lead to a cross spanning object, but also pays attention to the clearance distance of a sideline to buildings, trees, mountain bodies and the like in windage yaw. The accurate calculation of the clearance distance between the dangerous point and the windage yaw of the wire of the power transmission line is an important work for solving the hidden danger of the channel of the power transmission line, and the core and difficulty of the clearance distance are the calculation of the windage yaw distance, so the accuracy, convenience and quickness of the calculation of the windage yaw distance are the key for solving the problem.
At present, in the operation process, windage yaw calculation is often required to be carried out on any point in the span of the power transmission line, the windage yaw calculation of the power transmission line by an operation unit still adopts a manual calculation mode, a special calculation device is not provided, the calculation workload is large, the working efficiency is low, and errors are easy to occur. Therefore, how to overcome the defects of the prior art is a problem which needs to be solved urgently in the technical field of the electric auxiliary equipment at present.
Disclosure of Invention
The invention aims to provide a method and a device for calculating the windage yaw of a transmission line channel, which solve the problems that the calculation workload is large, the working efficiency is low, errors are easy to occur and a special calculation device is used when manual decentralized calculation is used for calculating the windage yaw of the transmission line channel.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a power transmission line channel wind deflection calculating device comprises a shell, a data acquisition module, a data display module, a wire self-weight specific load g1 calculating module, a wire maximum wind time ice-free wind pressure specific load g4 calculating module, a strain tower gear internal wind deflection calculating module, a tangent tower suspension insulator string wind deflection considering calculating module and a suspension insulator string wind pressure Pz calculating module;
the data acquisition module is respectively connected with a lead dead weight specific load g1 calculation module, a lead maximum wind time non-ice wind pressure specific load g4 calculation module, a tension tower inner wind deflection calculation module, a tangent tower suspension insulator string considered wind deflection calculation module and a suspension insulator string wind pressure Pz calculation module;
the data display module is respectively connected with a lead dead weight specific load g1 calculation module, a lead maximum wind time non-ice wind pressure specific load g4 calculation module, a tension tower inner wind deflection calculation module, a tangent tower suspension insulator string considered wind deflection calculation module and a suspension insulator string wind pressure Pz calculation module;
the lead dead weight specific load g1 calculation module and the lead maximum wind time ice-free wind pressure specific load g4 calculation module are connected with the strain tower gear internal wind deflection calculation module; the lead dead weight specific load g1 calculation module and the lead maximum wind time ice-free wind pressure specific load g4 calculation module are connected with the tangent tower suspension insulator string wind deflection calculation module;
the wind pressure Pz calculation module of the suspension insulator string is also connected with the wind deflection calculation module of the tangent tower considering the suspension insulator string;
according to the data collected by the data collecting module, the value of the dead weight g1 is calculated by a wire dead weight g1 calculating module; calculating a value of the ice-free wind pressure specific load g4 by a calculation module of the ice-free wind pressure specific load g4 at the maximum wind time of the wire;
if the strain tower is the strain tower, obtaining a lead deviation value through a strain tower gear internal wind deviation calculation module according to the data collected by the data collection module, the lead dead weight ratio g1 and the lead maximum wind time ice-free wind pressure ratio g 4;
if the tower is a linear tower, acquiring the offset of the suspended insulator string through a suspended insulator string wind pressure Pz calculation module according to the data acquired by the data acquisition module, and then acquiring a lead offset value through the linear tower by considering the suspended insulator string wind offset calculation module according to the lead dead weight ratio g1 and the lead maximum wind time ice-free wind pressure ratio g 4; and finally, outputting the wire offset value of the tension tower or the linear tower through the data display module.
Further, it is preferred that the housing is formed by two box-like structures hinged to each other.
Further, it is preferable that the data acquisition module includes a keyboard and a data interface disposed on the housing. But not limited thereto, those skilled in the art should understand that any device capable of acquiring the parameters required by the present invention may be used, such as a sensor, etc.
Further, preferably, the data display module includes a display screen and a sound box.
Further, preferably, the two sound boxes are symmetrically arranged on two sides of the display screen.
Further, preferably, a memory and a central processing unit are arranged in the lead dead weight g1 calculation module, the lead maximum wind time ice-free wind pressure g4 calculation module and the insulator string wind pressure Pz calculation module.
Further, preferably, a memory and a central processing unit are arranged in the strain tower gear wind deflection calculation module and the tangent tower suspension insulator string wind deflection calculation module.
Further, preferably, a rechargeable battery is arranged at the bottom of the shell and is electrically connected with the data acquisition module, the data display module, the wire dead weight ratio g1 calculation module, the wire maximum wind time ice-free wind pressure ratio g4 calculation module, the tension tower gear inner wind deflection calculation module, the tangent tower suspension insulator string considered wind deflection calculation module and the suspension insulator string wind pressure Pz calculation module respectively.
Compared with the prior art, the invention has the beneficial effects that:
the method and the device for calculating the wind deflection of the power transmission line channel solve the difficulty caused by multiple manual calculation steps, and are simple to operate and easy to operate. The calculation method and the calculation device are simple to operate, and a large amount of professional human resources are saved. In addition, compared with manual calculation, the calculation device avoids errors in the manual calculation, improves the calculation speed, and can ensure the accuracy of the calculation result and save a large amount of time.
Drawings
FIG. 1 is a flow chart of a calculation of windage yaw in a strain tower gear;
FIG. 2 is a flow chart of windage yaw calculation within a tangent tower gear;
FIG. 3 is a schematic view of the apparatus of the present invention;
FIG. 4 is a schematic view of the structure of the device of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wirelessly connected.
In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "provided" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
The device for calculating the windage yaw of the power transmission line channel shown in fig. 1-2 and 4 comprises a shell, and is characterized in that: the system also comprises a data acquisition module 1, a data display module 2, a wire dead weight ratio g1 calculation module 3, a wire maximum wind time ice-free wind pressure ratio g4 calculation module 4, a tension tower inner wind deflection calculation module 5, a tangent tower considered suspension insulator string wind deflection calculation module 6 and a suspension insulator string wind pressure Pz calculation module 7;
the data acquisition module 1 is respectively connected with a lead self-weight specific load g1 calculation module 3, a lead maximum wind time non-ice wind pressure specific load g4 calculation module 4, a strain tower gear internal wind deflection calculation module 5, a tangent tower considered suspension insulator string wind deflection calculation module 6 and a suspension insulator string wind pressure Pz calculation module 7;
the data display module 2 is respectively connected with a wire dead weight ratio g1 calculation module 3, a wire maximum wind time ice-free wind pressure ratio g4 calculation module 4, a strain tower gear internal wind deflection calculation module 5, a tangent tower consideration suspension insulator string wind deflection calculation module 6 and a suspension insulator string wind pressure Pz calculation module 7, and the data display module 2 is used for displaying and broadcasting calculation results of the wire dead weight ratio g1 calculation module 3, the wire maximum wind time ice-free wind pressure ratio g4 calculation module 4, the strain tower gear internal wind deflection calculation module 5, the tangent tower consideration suspension insulator string wind deflection calculation module 6 and the suspension insulator string wind pressure Pz calculation module 7;
the lead dead weight specific load g1 calculation module 3 and the lead maximum wind time ice-free wind pressure specific load g4 calculation module 4 are connected with the strain tower gear internal wind deflection calculation module 5; the lead dead weight specific load g1 calculation module 3 and the lead maximum wind time ice-free wind pressure specific load g4 calculation module 4 are also connected with a tangent tower suspension insulator string wind deflection calculation module 6;
the suspension insulator string wind pressure Pz calculation module 7 is also connected with the tangent tower wind deflection calculation module 6 considering the suspension insulator string and the data display module 2;
all parameters (including the mass of the overhead line in unit length, the calculated sectional area of the overhead line, the gravity acceleration, the uneven coefficient of wind pressure, the wind load adjustment coefficient, the shape coefficient of the wind carrier, the air quality, the wind speed, the outer diameter of the overhead line and the included angle between the wind direction and the line) required for calculating the dead weight ratio g1 and the maximum wind time ice-free wind pressure ratio g4 are collected by a data collection module 1; calculating a value of the dead weight g1 by a wire dead weight g1 calculating module 3; calculating a value of the ice-free wind pressure specific load g4 by a calculation module 4 of the ice-free wind pressure specific load g4 in the maximum wind time of the wire;
if the strain tower is used, acquiring parameters such as the span of a calculation gear, the horizontal distance between a calculation point and the strain tower, the calculation point sag, the wind deflection angle of a lead, the annual average running stress of the lead, the lead hanging point difference angles of the front and rear base rod towers and the like according to the data acquisition module 1, leading in a lead dead weight ratio g1 and a lead maximum wind time ice-free wind pressure ratio g4, and obtaining a lead deviation value through a wind deflection calculation module 5 in the strain tower gear;
if the tower is a straight line tower, acquiring parameters such as the number of insulator strings used by each phase of conductor, the number of insulators in each string, the wind area of each insulator, the coefficient of variation of wind pressure along with height, the wind speed and the like by the data acquisition module 1, obtaining the offset of the suspended insulator string by the wind pressure Pz calculation module 7 of the suspended insulator string, then introducing the dead weight ratio g1 of the conductor and the ice-free wind pressure ratio g4 of the conductor in the maximum wind, and obtaining the offset value of the conductor by the straight line tower considering the wind deflection calculation module 6 of the suspended insulator string; and finally, outputting the wire offset value of the tension tower or the linear tower through the data display module 2.
All parameter data required in the calculation process are collected uniformly through the data collection module 1, after collection, data of corresponding modules are transmitted to the memories of all calculation modules to be stored, when functions of a certain module are required to be used, the corresponding module is selected through the input module to be input, the input module is processed by the central processing unit to obtain a final result, meanwhile, input information is displayed and output on a display of the output module, and the input information is assisted through voice if necessary, so that errors are prevented from being generated. Each module central processor integrates the required processing operations.
In the wire dead weight g1 calculation module 3, the wire dead weight g1 is the unit load of dead weight on a unit section of the wire.
q is the mass of the overhead line per unit length; a, calculating the sectional area of the overhead line; g is the gravity acceleration, and the value is 9.8N/kg.
In the calculation module 4 of the wire maximum wind time ice-free wind pressure specific load g4, the wire maximum wind time ice-free wind pressure specific load g4 means that when the horizontal wind direction forms an angle theta with the wire axis, wind pressure on the wire in unit length orthogonal to the wire axis is generated.
wv: the standard value of the benchmark wind pressure is expressed as follows:
uneven wind pressure coefficient af: the non-uniform coefficient of the wind pressure can be obtained through statistics of long-term observation data on an operation or test line.
Wind load adjustment factor βc: when the airflow flows on the earth surface, friction force is generated due to the influence of the roughness of the earth surface, so that the wind direction and the wind speed close to the earth surface change along with different heights, and the wind speed can be obtained through calculation.
Wind carrier type coefficient musc: when the wind direction is orthogonal to the wire axis, the wind pressure acting on it also needs to be multiplied by the wire form factor, which is also called the aerodynamic coefficient. The wind pressure acting on the object is related to the body type of the object. Specifying the wind-carrier form factor mu of an iced conductor and an iceless conductor having an outer diameter of less than 17mmsc1.2, outer diameter greater than or equal to 17mm, wind carrier shape factor mu of ice-free wiresc＝1.1。
ρ is air mass; v-wind speed; d is the outer diameter of the overhead line; a, calculating the sectional area of the overhead line; theta is the included angle between the wind direction and the line.
In the strain tower gear inner windage yaw calculation module 5, after the overhead conductor is balanced under the action of transverse wind, self weight and hanging points, an overhead ground wire and the vertical surface of the two hanging points form a windage yaw angle, the conductor has a horizontal swing displacement and a vertical displacement, and therefore the maximum horizontal windage yaw distance of the conductor in the strain tower gear and the maximum vertical windage yaw distance of the conductor are calculated.
Calculating point sag:
wire windage yaw:
wire windage yaw component:
delta l is the horizontal swinging displacement of the point wire; delta h-calculating the vertical swing displacement of the point wire; l-calculating the gear span of the gear; l' -calculating the horizontal distance of the point from the tower; fx-calculate point sag;
-a wire wind deflection angle; σ — wire annual average operating stress; omega-the height difference angle of the wire hanging points of the front and the rear base rod towers; g1 — wire dead weight ratio (leading from module 3); g 4-No specific load of ice wind pressure (from Module 4) at maximum wind of wire.
In the wind deflection calculation module 6 for considering the suspension insulator string in the tangent tower, when the calculation tower is the tangent tower, the wind deflection calculation of the suspension insulator string needs to be considered, and the suspension insulator string is generally regarded as a rigid straight rod with uniformly distributed load to bear the insulator string.
Wind deflection angle of suspension insulator string:
wind deflection component of suspension insulator string:
lh-a horizontal span; lv-a vertical span; gj-total insulator string weight; pz — insulator string wind pressure (import from module 7); a, calculating the sectional area of the overhead line; λ h-insulator string; λ v — insulator string; lj is the total length of the insulator string; g1 — wire dead weight ratio (leading from module 3); g 4-No specific load of ice wind pressure (from Module 4) at maximum wind of wire.
In the insulator string wind pressure Pz calculation module 7, the insulator string wind pressure Pz is a positive pressure formed when the large wind blows to the surface of the insulator string, and is the product of the wind area of the insulator multiplied by the wind pressure formed by the corresponding wind speed and height.
Suspension insulator string wind pressure: pz is n1n2ApKzv2/1600
n1-number of insulator strings for one phase conductor; n is2The number of the insulators in each string is calculated according to the wind area of an added insulator by hardware parts; ap-wind area of each insulator, 0.03m for single-skirt insulator20.04m for double-skirt insulator2(ii) a Kz is the coefficient of variation of wind pressure with height; v-wind speed.
Example 2
On the basis of the above embodiment, in this embodiment, the data acquisition module 1 includes a keyboard 11 disposed on a rotatable side in the casing of the computing device and a data interface 12 disposed on the casing, the casing of the computing device is configured as two boxes which are mutually switched to fit with each other, the boxes are opened when in use, the keyboard 11 of the input module is disposed on one side, the data interface 12 is disposed on the side, and the data interface card is used for exporting data and results generated in the computing process through the data interface and then printing the data and results.
Example 3
As shown in fig. 3, on the basis of the above embodiment, in this embodiment, the data display module 2 includes a display screen 21 rotatably disposed on the other side of the housing and a sound box 22 embedded in the housing, the sound box 22 is symmetrically disposed on both sides of the display screen 21, in the calculation process, the input or calculation result in the operation process is displayed on the display screen 21 of the data display module 2, and in the case of input error or other unreasonable condition, the sound box 22 outputs sound for reminding. The sound boxes 22 are symmetrically arranged on two sides of the display screen 21, and output is more flood and bright.
Example 4
On the basis of the above embodiments, in this embodiment, in order to enable each module to operate independently without disturbing, memories and central processors are provided in the tension tower intra-tower wind deflection calculation module 5 and the tangent tower suspension insulator string wind deflection calculation module 6 and the suspension insulator string wind pressure Pz calculation module 7, the central processors of the modules process data on the respective modules without affecting each other, and the other mode is to use the same processor for processing.
Example 5
On the basis of the above embodiments, in this embodiment, the wire dead weight g1 calculation module 3 and the wire maximum wind time ice-free wind pressure g4 calculation module 4 are provided with a central processing unit and a memory, and are processed by the central processing unit of a required module and sent to the next module when necessary. Another alternative is to use the same memory.
Example 6
As shown in fig. 3, on the basis of the above embodiment, in the present embodiment, the rechargeable battery 8 is disposed at the bottom of the housing to provide power support for each module.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a transmission line passageway windage yaw accounting device, includes the shell, its characterized in that: the system also comprises a data acquisition module (1), a data display module (2), a lead dead weight specific load g1 calculation module (3), a lead maximum wind time ice-free wind pressure specific load g4 calculation module (4), a strain tower gear internal wind deflection calculation module (5), a tangent tower considered suspension insulator string wind deflection calculation module (6) and a suspension insulator string wind pressure Pz calculation module (7);
the data acquisition module (1) is respectively connected with a lead dead weight ratio g1 calculation module (3), a lead maximum wind time non-ice wind pressure ratio g4 calculation module (4), a strain tower gear inner wind deflection calculation module (5), a tangent tower considered suspension insulator string wind deflection calculation module (6) and a suspension insulator string wind pressure Pz calculation module (7);
the data display module (2) is respectively connected with a lead dead weight ratio g1 calculation module (3), a lead maximum wind time non-ice wind pressure ratio g4 calculation module (4), a tension tower gear inner wind deflection calculation module (5), a tangent tower considered suspension insulator string wind deflection calculation module (6) and a suspension insulator string wind pressure Pz calculation module (7);
the lead dead weight specific load g1 calculation module (3) and the lead maximum wind time ice-free wind pressure specific load g4 calculation module (4) are connected with the strain tower gear internal wind deflection calculation module (5); the lead dead weight specific load g1 calculation module (3) and the lead maximum wind time ice-free wind pressure specific load g4 calculation module (4) are connected with the tangent tower considered suspension insulator string windage yaw calculation module (6);
the suspension insulator string wind pressure Pz calculation module (7) is also connected with a tangent tower wind deflection calculation module (6) considering the suspension insulator string;
according to data acquired by the data acquisition module (1), a wire dead weight ratio g1 calculation module (3) is used for calculating to obtain a value of a dead weight ratio g1, and a wire maximum wind time ice-free wind pressure ratio g4 calculation module (4) is used for calculating to obtain a value of ice-free wind pressure ratio g 4;
if the strain tower is the strain tower, obtaining a lead deviation value through a strain tower gear internal wind deviation calculation module (5) according to data collected by the data collection module (1), the lead dead weight ratio g1 and the lead maximum wind time ice-free wind pressure ratio g 4;
if the tower is a linear tower, obtaining the offset of the suspended insulator string through a suspended insulator string wind pressure Pz calculation module (7) according to the data collected by the data collection module (1), and then obtaining a lead offset value through a linear tower considering a suspended insulator string wind deflection calculation module (6) according to a lead dead weight ratio g1 and a lead maximum wind time ice-free wind pressure ratio g 4; and finally, outputting the wire offset value of the tension tower or the linear tower through the data display module (2).
2. The device for calculating windage yaw of the electric transmission line channel according to claim 1, wherein: the housing is formed of two box-like structures hinged to each other.
3. The device for calculating windage yaw of the electric transmission line channel according to claim 1, wherein: the data acquisition module (1) comprises a keyboard (11) and a data interface (12) arranged on the shell.
4. The device for calculating windage yaw of the electric transmission line channel according to claim 1, wherein: the data display module (2) comprises a display screen (21) and a sound box (22).
5. The device for calculating windage yaw of electric transmission line channel according to claim 4, wherein: the two sound boxes (22) are symmetrically arranged on two sides of the display screen (21).
6. The device for calculating windage yaw of the electric transmission line channel according to claim 1, wherein: and a storage and a central processing unit are arranged in the lead dead weight specific load g1 calculation module (3), the lead maximum wind time ice-free wind pressure specific load g4 calculation module (4) and the insulator string wind pressure Pz calculation module (7).
7. The device for calculating windage yaw of the electric transmission line channel according to claim 1, wherein: and a memory and a central processing unit are arranged in the strain tower gear wind deflection calculation module (5) and the tangent tower suspension insulator string wind deflection calculation module (6).
8. The device for calculating windage yaw of the electric transmission line channel according to claim 1, wherein: the bottom of shell sets up rechargeable battery (8), respectively with data acquisition module (1), data display module (2), wire dead weight ratio year g1 calculation module (3), wire maximum wind-hour no ice wind pressure ratio year g4 calculation module (4), strain tower shelves in wind offset calculation module (5), tangent tower consider insulator string wind offset calculation module (6), insulator string wind pressure Pz calculation module (7) electricity that dangles are connected.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484639A (en) * | 2020-11-23 | 2021-03-12 | 国网北京市电力公司 | Method and device for determining windage yaw position of wire, storage medium and processor |
| CN113109587A (en) * | 2021-03-15 | 2021-07-13 | 南方电网科学研究院有限责任公司 | Method, system and device for measuring wind speed of power transmission line and storage medium |
| CN114396859A (en) * | 2021-12-06 | 2022-04-26 | 清华大学 | Overhead line windage yaw monitoring method and device based on ground wire electromagnetic signals |
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| CN112484639A (en) * | 2020-11-23 | 2021-03-12 | 国网北京市电力公司 | Method and device for determining windage yaw position of wire, storage medium and processor |
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| CN114396859A (en) * | 2021-12-06 | 2022-04-26 | 清华大学 | Overhead line windage yaw monitoring method and device based on ground wire electromagnetic signals |
| CN114396859B (en) * | 2021-12-06 | 2023-04-25 | 清华大学 | Overhead line windage yaw monitoring method and device based on ground wire electromagnetic signals |
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