CN114396859A - Overhead line windage yaw monitoring method and device based on ground wire electromagnetic signals - Google Patents
Overhead line windage yaw monitoring method and device based on ground wire electromagnetic signals Download PDFInfo
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Abstract
The invention provides a method and a device for monitoring wind deflection of an overhead line based on a ground wire electromagnetic signal, wherein the method comprises the following steps: installing a voltage monitoring device or a current monitoring device on the ground wire of the overhead line, and monitoring the induced voltage or the induced current on the ground wire in real time by combining a matched data processing and communication module; when the induced voltage or the induced current changes, the induced voltage or the induced current value of the ground wire before and after the change is judged by the relevant module and then is sent to the data processing end; the method comprises the steps of reversely deducing the mutual inductance change condition between the ground wires by combining the size of the line running current and the collected ground wire electromagnetic signal change condition, and reversely deducing the space position change condition of the lead wires based on the mutual inductance change condition between the lead wires and the ground wires; and reversely deducing the windage yaw condition of the line according to the change condition of the space position of the lead, and giving an alarm when the windage yaw condition exceeds a threshold value. The method and the device can monitor the sag state of the circuit on line in a self-powered manner, an additional power supply is not needed, and the normal operation of the circuit is not influenced when the monitoring device breaks down.
Description
Technical Field
The invention belongs to the technical field of high voltage, and particularly relates to an overhead line windage yaw monitoring method and device based on ground wire electromagnetic signals.
Background
The windage yaw is a phenomenon that a wire of a power transmission line deviates from the vertical position under the action of wind, and mainly comprises a jumper windage yaw, an interphase windage yaw and an insulator windage yaw. Windage yaw and waving of the wire are different. Under the condition that the wind speed is too high or too low, the conducting wire does not generally swing; for windage yaw, the windage yaw phenomenon is more serious when the wind speed is higher.
Windage yaw can cause the distance between wires or towers to be too small, which in turn can lead to flashover or trip faults. Due to the continuity of wind, reclosing cannot be successfully carried out after wind deflection flashover tripping generally, and therefore the line is stopped. Between 2005 and 2011, over 750 wind deflection trips occur in 110kV and above transmission lines in China, and only 20 wind deflection trips occur in 500kV lines in Henan province in nearly 10 years, which brings great harm to the safe operation of a power system.
At present, an on-line monitoring method for wind deflection of an overhead transmission line mainly aims at mounting a motion sensor on a lead, and the method has the problems of large quantity of sensors, power failure operation during mounting and maintenance, difficulty in power supply of a monitoring device and the like.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first purpose of the invention is to provide an overhead line windage yaw monitoring method based on ground wire electromagnetic signals, which solves the problems of more sensors, high cost and difficult installation in the existing method, and also solves the technical problems that the existing method has complex calculation principle and influences the normal operation of the line when the sensor fails, the spatial position of the line can be judged according to the information of the ground wire electromagnetic signals and the current of the conducting wire, meanwhile, an additional power supply is not needed, the online monitoring of the spatial position of the line in a self-powered manner can be realized, the size of the installed device is small, the fault cost is low, and the normal operation of the line is not influenced when the fault occurs. The method for monitoring the windage yaw condition of the power transmission conductor based on the induced voltage on the sectional insulation ground wire or the induced current change condition on the OPGW is simple in principle, low in cost, simple and convenient to install and maintain and high in feasibility.
The second purpose of the invention is to provide an overhead line windage yaw monitoring device based on the ground wire electromagnetic signal.
A third object of the present application is to propose a non-transitory computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for monitoring windage yaw of an overhead line based on a ground line electromagnetic signal, including: installing a voltage monitoring device or a current monitoring device on the ground wire of the overhead line, and monitoring the induced voltage or the induced current on the ground wire in real time by combining a matched data processing and communication module; sending the ground wire induction voltage or induction current value before and after the change to a data processing end based on the induction voltage or induction current value; according to the size of the line running current and the change condition of the collected ground wire electromagnetic signals, the mutual inductance change condition between the conducting wire and the ground wire is reversely deduced, and the space position change condition of the conducting wire is reversely deduced based on the mutual inductance change condition between the conducting wire and the ground wire; and reversely deducing the windage yaw condition of the line according to the change condition of the space position of the lead, and giving an alarm when the windage yaw condition exceeds a threshold value.
The overhead line windage yaw monitoring method based on the ground wire electromagnetic signal provided by the embodiment of the invention can monitor the line by using the voltage or current signal on the ground wire, and can also supply power to the monitoring device by using the voltage or current signal, thereby realizing the purpose of self-power supply and even supplying power to other devices.
In addition, the overhead line windage yaw monitoring method based on the ground wire electromagnetic signal according to the above embodiment of the present invention may further have the following additional technical features:
further, in an embodiment of the present invention, the step of further reversely deducing a mutual inductance change situation between the ground lines by combining a change situation of a line operating current and a change situation of an acquired ground line electromagnetic signal, and based on the mutual inductance change situation, further reversely deducing a change situation of a spatial position of the lead includes:
analyzing and judging the mutual inductance change condition between the conducting wire and the ground wire based on the monitored ground wire voltage or current change condition;
reversely deducing the change condition of the mutual inductance between the ground wires and the distance change condition between the ground wires;
and further thinning the space position change condition of the lead according to the distance change condition between the lead and the ground.
Further, in an embodiment of the present invention, the determination is performed according to the windage yaw of the wire, and an alarm is issued when the maximum deviation amount of the wire exceeds a preset threshold.
In order to achieve the above object, a second aspect of the present invention provides an overhead line windage yaw monitoring device based on a ground line electromagnetic signal, which is characterized by comprising the following modules: the monitoring module is used for installing a voltage monitoring device or a current monitoring device on the overhead line ground wire and monitoring the induced voltage or induced current on the ground wire in real time by combining a matched data processing and communication module; the acquisition module is used for sending the ground wire induction voltage or the induction current value before and after the change to the data processing end based on the induction voltage or the induction current value; the analysis module is used for reversely deducing mutual inductance change conditions between the wires and the ground according to the line running current and the collected ground wire electromagnetic signal change conditions, and reversely deducing space position change conditions of the wires based on the mutual inductance change conditions between the wires and the ground; and the warning module is used for reversely deducing the windage yaw condition of the line according to the change condition of the spatial position of the lead and giving an alarm when the windage yaw condition exceeds a threshold value.
Optionally, in an embodiment of the present application, the monitoring device further includes a power supply module, configured to supply power to the monitoring device by using the induced voltage or the induced current on the ground line, so as to achieve self-power.
To achieve the above object, a non-transitory computer readable storage medium is provided in a third aspect of the present application, and when executed by a processor, the instructions in the storage medium can execute a method for overhead line windage monitoring based on a ground line electromagnetic signal.
The overhead line windage yaw monitoring method based on the ground wire electromagnetic signal, the overhead line windage yaw monitoring device based on the ground wire electromagnetic signal and the non-temporary computer readable storage medium provided by the embodiment of the invention solve the problems of more sensors, high cost and difficult installation in the existing method, solve the technical problems that the existing method has complex calculation principle and can influence the normal operation of the line when the sensor fails, can judge the spatial position of the line through the information of the ground wire electromagnetic signal and the current of the conducting wire, do not need an additional power supply, can realize the online monitoring of the spatial position of the line in a self-powered manner, have small volume and low fault cost in the installed device, and do not influence the normal operation of the line when the line fails. The method for monitoring the windage yaw condition of the power transmission conductor based on the induced voltage on the sectional insulation ground wire or the induced current change condition on the OPGW is simple in principle, low in cost, simple and convenient to install and maintain and high in feasibility.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of an overhead line windage yaw monitoring method based on a ground wire electromagnetic signal according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of an overhead line windage yaw monitoring device based on a ground wire electromagnetic signal according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of ground line sensing according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of calculating a spatial position of a conducting wire according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a monitoring scheme provided in an embodiment of the present invention.
Fig. 6 is a schematic diagram illustrating a variation of the ground line induced current according to the wind deflection degree according to the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The method and the device for monitoring the windage yaw of the overhead line based on the ground wire electromagnetic signal are described below with reference to the attached drawings.
Fig. 1 is a schematic flow chart of an overhead line windage yaw monitoring method based on a ground wire electromagnetic signal according to an embodiment of the present invention.
As shown in fig. 1, the overhead line windage yaw monitoring method based on the ground wire electromagnetic signal includes the following steps:
s101: installing a voltage monitoring device or a current monitoring device on the ground wire of the overhead line, and monitoring the induced voltage or the induced current on the ground wire in real time by combining a matched data processing and communication module;
s102: sending the ground wire induction voltage or the induction current value before and after the change to a data processing end based on the induction voltage or the induction current value;
s103: according to the size of the line running current and the change condition of the collected ground wire electromagnetic signals, reversely deducing the mutual inductance change condition between the ground wires, and further reversely deducing the change condition of the space position of the lead;
s104: and reversely deducing the windage yaw condition of the line according to the change condition of the space position of the lead, and giving an alarm when the windage yaw condition exceeds a threshold value.
According to the method for monitoring the windage yaw of the overhead line based on the ground wire electromagnetic signal, the voltage monitoring device or the current monitoring device is installed on the ground wire of the overhead line, and the induction voltage or the induction current on the ground wire is monitored in real time by combining the matched data processing and communication module; when the induced voltage or the induced current changes, the induced voltage or the induced current value of the ground wire before and after the change is judged by the relevant module and then is sent to the data processing end; the method comprises the steps of reversely deducing the mutual inductance change condition between the ground wires by combining the change condition of the line running current and the collected change condition of the ground wire electromagnetic signal, and reversely deducing the space position change condition of the lead wires based on the mutual inductance change condition between the lead wires and the ground wires; and reversely deducing the windage yaw condition of the line according to the change condition of the space position of the lead, and giving an alarm when the windage yaw condition exceeds a threshold value. Therefore, the problems that the number of sensors related to the existing method is large, the cost is high, and the installation is difficult can be solved, the technical problems that the calculation principle of the existing method is complex, and the normal operation of a line can be influenced when the sensors are in fault can be solved, the spatial position of the line can be judged through the information of the ground wire electromagnetic signal and the lead current, an additional power supply is not needed, the spatial position of the line can be monitored on line in a self-powered manner, the size of the installed device is small, the fault cost is low, and the normal operation of the line is not influenced when the fault occurs. The method for monitoring the windage yaw condition of the power transmission conductor based on the induced voltage on the sectional insulation ground wire or the induced current change condition on the OPGW is simple in principle, low in cost, simple and convenient to install and maintain and high in feasibility.
The method for monitoring the windage yaw of the overhead line based on the ground wire electromagnetic signal can be used for carrying out real-time online monitoring on the windage yaw condition of the overhead line conductor, namely, the windage yaw condition of the overhead line conductor is judged by monitoring induced voltage or induced current on the ground wire.
When an alternating current transmission line is in normal power-on operation, alternating current in a lead can generate a variable magnetic field in space, when the variable magnetic field acts on a loop formed by 'ground wire-earth' or two ground wires, induced voltage can be generated, and induced current is further generated, the basic principle of the phenomenon is a faraday electromagnetic induction law, and a schematic diagram is shown in fig. 3, wherein the faraday electromagnetic induction law is expressed as:
when a line has windage yaw, the wire takes a hanging point as an axis and an arc sag as a radius under the action of wind, and the wire has position deviation in space, namely the distance between the conducting wire and the ground wire changes, so that the mutual inductance between the conducting wire and the ground wire changes, the induced voltage and the induced current on the ground wire can also change along with the change when the current of the line is constant, and the more serious the windage yaw is, the larger the electromagnetic signal change of the ground wire is, so that the electromagnetic signal of the ground wire can be used for carrying out online monitoring on the windage yaw condition of the line. As shown in fig. 5.
Further, in an embodiment of the present invention, the step of further reversely deducing a mutual inductance change situation between the ground lines by combining the magnitude of the line operating current and the collected ground line electromagnetic signal change situation, and based on the mutual inductance change situation, further reversely deducing a lead space position change situation includes:
analyzing and judging the mutual inductance change condition between the conducting wire and the ground wire based on the monitored ground wire voltage or current change condition;
reversely deducing the change condition of the mutual inductance between the ground wires and the distance change condition between the ground wires;
and further thinning the space position change condition of the lead according to the distance change condition between the lead and the ground.
The mutual inductance change condition between the lead and the ground is obtained through the change condition of the electromagnetic signal of the ground, and the first formula is expressed as follows:
EG＝ZGLIL，
wherein E isGIs the voltage drop per unit length on the ground, ZGLMutual inductance between conducting and ground wires, ILIs the current of the wire;
the distance change situation between the conducting wire and the ground wire is obtained through the mutual inductance change situation of the conducting wire and the ground wire, and the second formula is expressed as follows:
wherein Z isijRepresenting the mutual inductance between the ith and jth conductors and grounds, dijIs the distance between the ith and jth conductors, DgFor the equivalent depth of the conductor to the earth mirror image, in m, preferably
Wherein rho is the resistivity of the soil (omega. m), and f is the power frequency (Hz);
when analyzing the problem of distance change between the conducting wires and the ground wires caused by windage yaw, firstly, a conducting wire equation considering sag needs to be introduced. Because the distance between two suspension points of the overhead transmission line is large, the influence of the rigidity of the wire on the shape of the overhead transmission line during suspension is small, the overhead transmission line can be described by a 'catenary' model, and a third formula is expressed as follows: :
wherein q is the load of the lead unit, T is the level of the lead tension, and both are mechanics-related parameters; and x0、y0Describing the relative position of the wires, the origin of coordinates can be determined from these two parameters.
Further, the method is characterized in that judgment is carried out according to the wire windage yaw condition, and an alarm is given when the maximum wire offset exceeds a preset threshold.
When the wire experiences windage yaw, the wire is no longer in the form of an in-plane catenary equation, but rather is "skewed catenary" that is offset a distance in the longitudinal direction, as shown in FIG. 4.
We introduce a lateral offset z to describe the offset distance laterally of the lowest point of the wire, with z being positive indicating outward and negative indicating inward. If the wind force on each point of the wire is considered to be uniform or not greatly different, the relationship between the transverse offset and the longitudinal offset of the wire can be described by using a white right-angled triangle in the figure, namely, the transverse offset of each point is in a linear relationship with the longitudinal offset thereof.
The position of the conductor within the whole span can be determined by two parameters a and z, and the longitudinal offset is expressed by the following formula:
in the formula, the included angle
Specifically, the height difference of the suspension points of the wires is set to be 0, the span of the wires is set to be 500m, the type of the selected wires is four-split JHA 1/GA1-400/95, and specific parameters are shown in Table 1. The influence of the z value on the induced current of the ground wire is calculated and obtained in the operation mode of the common ground wire with sectional insulation and OPGW grounded tower by tower according to the deviation distance between the wire and the position when the wire is normally suspended without wind, namely the z value in fig. 4, and is shown in fig. 6 (the fixed wire sag is 16 m). From the results we can see that the magnitude of the ground line induced current is approximately proportional to the horizontal wire offset when windage.
TABLE 1 calculation of specific parameters for selected conductors
After the horizontal deviation change relation of the ground wire induced current along with the wind deviation is obtained, the wind deviation degree of the wire under the type of the circuit can be reversely deduced according to the monitored ground wire induced current in subsequent practical application. The method and the effect are the same when the ground wire induction voltage is used for monitoring.
Further, in an embodiment of the present invention, the determination is performed according to the windage yaw of the wire, and an alarm is issued when the maximum deviation amount of the wire exceeds a preset threshold. .
The overhead line windage yaw monitoring method based on the ground wire electromagnetic signal provided by the embodiment of the invention can monitor the line by using the voltage or current signal on the ground wire, and can also supply power to the monitoring device by using the voltage or current signal, thereby realizing the purpose of self-power supply and even supplying power to other devices. Simultaneously has the following advantages and characteristics: the online monitoring of the windage yaw state of the line can be realized in a self-powered manner without an additional power supply; the principle is simple, the cost is low, the feasibility is high, and the installation and the maintenance are simple and convenient; the equipment has small volume and low fault cost, and does not influence the normal operation of the line.
In order to achieve the purpose, the invention further provides an overhead line windage yaw monitoring device based on the ground wire electromagnetic signal.
Fig. 2 is a schematic structural diagram of an overhead line windage yaw monitoring device based on a ground wire electromagnetic signal according to an embodiment of the present invention.
As shown in fig. 2, the overhead line windage yaw monitoring device based on the ground wire electromagnetic signal includes: the system comprises a monitoring module 10, an acquisition module 20, an analysis module 30 and an alarm module 40, wherein the monitoring module 10 is used for installing a voltage monitoring device or a current monitoring device on the overhead line ground wire and monitoring the induced voltage or induced current on the ground wire in real time by combining a matched data processing and communication module; the analysis module 30 is configured to reversely deduce mutual inductance change conditions between the wires and the ground according to the magnitude of the line operating current and the collected change conditions of the ground electromagnetic signals, and reversely deduct spatial position change conditions of the wires based on the mutual inductance change conditions between the wires and the ground; the warning module 40 is used for reversely deducing the windage yaw condition of the line according to the change condition of the spatial position of the lead, and giving an alarm when the windage yaw condition exceeds a threshold value.
Further, in the embodiment of the present application, the monitoring device further includes a power supply module, configured to supply power to the monitoring device by using an induced voltage or an induced current on a ground line, so as to realize self-power supply.
The overhead line windage yaw monitoring device based on the ground wire electromagnetic signal provided by the embodiment of the invention can monitor a line by using a voltage or current signal on the ground wire, and can also supply power to the monitoring device by using the voltage or current signal, thereby realizing the purpose of self-power supply and even supplying power to other devices. Simultaneously has the following advantages and characteristics: the online monitoring of the windage yaw state of the line can be realized in a self-powered manner without an additional power supply; the principle is simple, the cost is low, the feasibility is high, and the installation and the maintenance are simple and convenient; the equipment has small volume and low fault cost, and does not influence the normal operation of the line.
In order to implement the above embodiments, the present application further proposes a non-transitory computer-readable storage medium having a computer program stored thereon, where the computer program, when executed by a processor, implements the overhead line windage yaw monitoring method based on the ground wire electromagnetic signal of the above embodiments.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (7)
1. An overhead line windage yaw monitoring method based on ground wire electromagnetic signals is characterized by comprising the following steps:
installing a voltage monitoring device or a current monitoring device on the ground wire of the overhead line, and monitoring the induced voltage or the induced current on the ground wire in real time by combining a matched data processing and communication module;
when the induced voltage or the induced current changes, the induced voltage or the induced current value of the ground wire before and after the change is judged by the relevant module and then is sent to the data processing end;
the method comprises the steps of reversely deducing the mutual inductance change condition between the ground wires by combining the line running current and the collected ground wire electromagnetic signal change condition, and reversely deducing the space position change condition of the lead wires based on the mutual inductance change condition between the lead wires and the ground wires;
and reversely deducing the windage yaw condition of the line according to the change condition of the space position of the lead, and giving an alarm when the windage yaw condition exceeds a threshold value.
2. The method of claim 1, wherein the step of further reversely deducing the change situation of the spatial position of the conducting wire based on the change situation of the mutual inductance between the ground wire and the combination of the magnitude of the line running current and the change situation of the collected ground wire electromagnetic signal comprises:
analyzing and judging the mutual inductance change condition between the conducting wire and the ground wire based on the monitored ground wire voltage or current change condition;
reversely deducing the change condition of the mutual inductance between the ground wires and the distance change condition between the ground wires;
and further thinning the space position change condition of the lead according to the distance change condition between the lead and the ground.
3. The method of claim 1, wherein the determination is made based on the wire windage yaw and an alarm is issued when the maximum amount of wire deflection exceeds a preset threshold.
4. The method of claim 1, further comprising powering the monitoring device with an induced voltage or an induced current on a ground line to achieve self-powering.
5. An overhead line windage yaw monitoring device based on ground wire electromagnetic signals is characterized by comprising a voltage or current monitoring module, a data transmission module, a data processing module and an online monitoring module, wherein,
the voltage or current monitoring module is used for installing a voltage monitoring device or a current monitoring device on the ground wire of the overhead line and monitoring the induced voltage or the induced current on the ground wire in real time by combining a matched data processing and communication module;
the data transmission module is used for transmitting the ground wire induction voltage or induction current value before and after the change to the data processing end after the judgment of the relevant module when the induction voltage or induction current changes;
the data processing module is used for reversely deducing the mutual inductance change condition between the ground wires by combining the change condition of the line running current and the collected change condition of the electromagnetic signal of the ground wires and reversely deducing the space position change condition of the lead wires based on the mutual inductance change condition between the lead wires and the ground wires;
and the online monitoring module is used for reversely deducing the windage yaw condition of the line according to the change condition of the spatial position of the lead and giving an alarm when the windage yaw condition exceeds a threshold value.
6. The device of claim 5, further comprising a power module for powering the monitoring device with the induced voltage or the induced current on the ground to achieve self-powering.
7. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the method of any one of claims 1-4.
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| CN202111477325.5A CN114396859B (en) | 2021-12-06 | 2021-12-06 | Overhead line windage yaw monitoring method and device based on ground wire electromagnetic signals |
| PCT/CN2022/092079 WO2023103278A1 (en) | 2021-12-06 | 2022-05-10 | Online monitoring method for position information of conducting wire of power transmission line based on electromagnetic signal of ground wire |
| US18/408,026 US20240142509A1 (en) | 2021-12-06 | 2024-01-09 | Online monitoring method for dynamic changes in positions of transmission line conductors based on electromagnetic signals of ground wires |
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| WO2023103278A1 (en) * | 2021-12-06 | 2023-06-15 | 清华大学 | Online monitoring method for position information of conducting wire of power transmission line based on electromagnetic signal of ground wire |
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