CN114295196A - Overhead line galloping positioning method and device based on ground wire electromagnetic signals - Google Patents
Overhead line galloping positioning method and device based on ground wire electromagnetic signals Download PDFInfo
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- CN114295196A CN114295196A CN202111511460.7A CN202111511460A CN114295196A CN 114295196 A CN114295196 A CN 114295196A CN 202111511460 A CN202111511460 A CN 202111511460A CN 114295196 A CN114295196 A CN 114295196A
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Abstract
The application discloses a method, a device, equipment and a storage medium for positioning galloping of an overhead line based on ground wire electromagnetic signals, and relates to the technical field of high voltage. The specific implementation scheme is as follows: s1, acquiring relevant parameters of the overhead line, and constructing a ground wire equivalent circuit according to the relevant parameters; step S2, monitoring the electromagnetic signal on the ground wire in real time and carrying out spectrum analysis on the electromagnetic signal; step S3: when the frequency spectrum analysis generates a frequency abnormal signal, sending the frequency abnormal signal to a data processing end to generate an analysis result; step S4: and determining the frequency, the position and the amplitude of the line waving according to the analysis result. According to the embodiment of the application, the relevant parameters of the overhead line are obtained to construct the equivalent circuit of the ground wire, and further, the voltage or the current on the ground wire is monitored, so that the monitoring and the positioning of the line galloping are realized. The embodiment of the application can realize the positioning of the galloping of the overhead line without installing the monitoring device step by step, thereby greatly reducing the cost of galloping monitoring and positioning.
Description
Technical Field
The present application relates to the field of high voltage technologies, and in particular, to a method, an apparatus, a device, and a storage medium for an overhead line galloping positioning algorithm based on a ground line electromagnetic signal.
Background
An Optical fiber Composite Overhead Ground Wire (OPGW) is used for placing Optical fibers in a Ground Wire of an Overhead high-voltage transmission line to form an Optical fiber communication network on the transmission line, and the structural form has the dual functions of the Ground Wire and communication and is generally called an OPGW Optical cable.
Wire galloping is an abnormal motion state of a wire, and is mainly represented by a low-frequency and large-amplitude vibration phenomenon accompanied by twisting of the wire. Galloping can cause great harm to the transmission line, and generally shows that the galloping causes line-touching short circuit and flashover tripping or causes line hardware wear, spacer breakage, jumper wire falling, iron tower bolt loosening and falling, tower damage and the like.
The conductor galloping of the power transmission line frequently occurs in the three north areas of China in winter or in early spring, for example, the northeast area is taken as an example, the conductor galloping of the power transmission line occurs 67 times in recent years in total, and great challenges are brought to the safe and stable operation of a power system.
At present, the galloping of a transmission line wire is generally observed in a video monitoring mode, but the local area environment is severe or the signals are not good, the image acquisition is not facilitated, and the real-time state collection can be influenced because the image resolution of the video acquisition is not high.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
The application provides a method, a device, equipment and a storage medium for positioning galloping of an overhead line based on ground wire electromagnetic signals.
According to a first aspect of the application, a method for positioning the waving of an overhead line based on a ground wire electromagnetic signal is provided, which comprises the following steps:
s1, acquiring relevant parameters of the overhead line, and constructing a ground wire equivalent circuit according to the relevant parameters;
step S2, monitoring the electromagnetic signal on the ground wire in real time and carrying out spectrum analysis on the electromagnetic signal;
step S3: when the frequency spectrum analysis generates a frequency abnormal signal, sending the frequency abnormal signal to a data processing end to generate an analysis result;
step S4: and determining the frequency, the position and the amplitude of the line waving according to the analysis result.
Optionally, the electromagnetic signal on the ground line includes at least one of:
voltage at two ends of the sectional ground wire insulator;
induced current on the optical fiber composite overhead ground wire OPGW.
Optionally, the analyzed frequency abnormal signal represents a coupling of ground line induced voltage or ground line induced current to a galloping frequency component, wherein the galloping frequency component is an additional low-frequency component coupled to the power frequency electromagnetic induction signal when the position of the wire in the vertical direction changes.
Optionally, the determining the frequency, the position, and the amplitude of the line waving according to the analysis result includes:
determining the conductor galloping frequency;
acquiring phase information of a signal frequency component corresponding to the galloping according to the galloping frequency of the conductor;
determining the position of the line galloping according to the phase information;
and calculating the galloping amplitude according to the line galloping position.
Optionally, the determining the position of the waving according to the phase information includes:
determining a location of the device that monitors the largest characteristic frequency component;
comparing the phases of the characteristic frequencies monitored by the device and the adjacent devices on the two sides of the device;
and determining the position of the line galloping according to the line propagation rule of the characteristic signal phase obtained based on the ground wire equivalent circuit.
Optionally, the calculating the waving amplitude according to the position of the line waving includes:
after the line galloping position is obtained, the galloping amplitude at the galloping position can be deduced based on the law that the galloping amplitude exponentially attenuates along the line.
Optionally, the method further includes:
the steps S2, S3, S4 are repeated continuously, and an alarm is issued when the calculated dancing amplitude result exceeds the set threshold.
According to a second aspect of the present application, there is provided an overhead line galloping positioning device based on ground wire electromagnetic signals, comprising:
the signal spectrum analysis module is used for monitoring the electromagnetic signal on the ground wire in real time and carrying out spectrum analysis on the electromagnetic signal;
the abnormal signal analysis module is used for sending a frequency abnormal signal to the data processing end when the frequency abnormal signal occurs in the frequency spectrum analysis and generating an analysis result;
and the data analysis module is used for determining the frequency, the position and the amplitude of the line galloping according to the analysis result.
And the early warning module is used for giving an alarm when the calculated galloping amplitude result exceeds a set threshold value.
According to a third aspect of the present application, there is provided an electronic device comprising:
at least one processor;
and a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of the first aspects as described above.
According to a fourth aspect of the present application, there is provided a non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any of the first aspects above.
According to a fifth aspect of the present application, there is provided a computer program product comprising a computer program which, when executed by a processor, implements the method according to any of the first aspects above.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
the positioning of the line galloping is realized by constructing an equivalent circuit of the ground wire and monitoring the voltage or the current of the ground wire in real time. When the galloping positioning is realized, a monitoring device does not need to be installed step by step, and the cost of galloping monitoring and positioning is greatly reduced.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present application, nor do they limit the scope of the present application. Other features of the present application will become apparent from the following description.
Drawings
The drawings are included to provide a better understanding of the present solution and are not intended to limit the present application. Wherein:
fig. 1 is a flowchart of a method for positioning an overhead line galloping based on a ground line electromagnetic signal according to an embodiment of the present application;
FIG. 2 is a flow chart of an overhead line galloping positioning algorithm based on ground wire electromagnetic signals provided according to an embodiment of the present application;
FIG. 3 is a flow chart of an overhead line galloping positioning algorithm based on ground wire electromagnetic signals provided according to an embodiment of the present application;
FIG. 4 is a block diagram of an overhead line galloping positioning device based on ground wire electromagnetic signals according to an embodiment of the application;
FIG. 5 is a waveform diagram of induced voltage on a segment insulated ground wire when a conductor is waved according to an embodiment of the present application;
fig. 6 is a waveform diagram of an induced current on the OPGW during conductor galloping according to an embodiment of the present application;
FIG. 7 is a graph of the magnitude of the waving frequency component versus the waving amplitude provided in an embodiment of the present application;
FIG. 8 is a graph of measured position versus current phase difference provided in accordance with an embodiment of the present application;
FIG. 9 is a graph illustrating the relationship between the oscillation frequency components and the attenuation law of the amplitude along the line according to the embodiment of the present application;
FIG. 10 is a schematic view of a multi-range dancing positioning provided in accordance with an embodiment of the present application;
FIG. 11 is a schematic diagram of a single device in line according to an embodiment of the present application;
fig. 12 is a block diagram of an overhead line galloping positioning algorithm based on a ground line electromagnetic signal according to an embodiment of the application.
Fig. 13 is a block diagram of an apparatus provided in accordance with an embodiment of the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of the embodiments of the disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
The method and the device for positioning the waving of the overhead line based on the ground wire electromagnetic signal according to the embodiment of the application are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for positioning an overhead line galloping based on a ground line electromagnetic signal according to an embodiment of the present application, and as shown in fig. 1, the method includes the following steps:
In the embodiment, relevant parameters of the overhead line, such as the height of the ground wire to the ground, the span, the model of the ground wire and the like, are obtained to construct a ground wire equivalent circuit, and then, the phase and amplitude attenuation rule of the signal transmitted along the ground wire when a fault signal occurs can be deduced based on the obtained parameters, so that the subsequent backstepping and positioning of the waving characteristics are facilitated.
In this embodiment, when the line conductor is waved, the position of the line conductor in the vertical direction may change periodically, which may cause the mutual inductance between the line conductor and the ground to change periodically, and the induced voltage current on the ground may also change at a certain time of the line current.
The current transformer can be additionally arranged on the ground wire to monitor the induced current on the OPGW; or the voltage sensors are additionally arranged at the two ends of the ground wire insulator and used for detecting the voltages at the two ends of the sectional ground wire insulator. Namely, by arranging a voltage or current monitoring device, the induced voltage or the induced current on the ground wire can be detected in real time. And performing signal spectrum analysis on the induction voltage or the induction current by acquiring the induction voltage or the induction current on the ground wire. As shown in fig. 5 and 6, the induced current and voltage are subjected to spectrum analysis and multiple simulations, so that:
when the conducting wire is waved, the induction signal on the ground wire can be superposed with the corresponding 50 +/-fcFrequency component of Hz, fcThe characteristic is obvious and easy to realize in recognition for the frequency of conductor galloping, and can be used as a basis for monitoring the conductor galloping.
And 103, when the frequency abnormal signal occurs in the frequency spectrum analysis, sending the frequency abnormal signal to a data processing end to generate an analysis result.
In this embodiment, if the electromagnetic signal finds an abnormal frequency component, that is, when a ground line induced voltage or an induced current is coupled out of the galloping frequency component, the galloping frequency component is an additional low-frequency component coupled on the basis of the power frequency electromagnetic induction signal when the position of the wire in the vertical direction is changed.
And if the circuit parameters do not find abnormal frequency signals, continuously monitoring the electromagnetic signals of the ground wire in real time.
And 104, determining the frequency, the position and the amplitude of the line galloping according to the analysis result.
In this embodiment, the galloping frequency component can be obtained according to step 103, when the line gallows, the line will be coupled with the line galloping component, and the combination of the matched data processing and communication module can obtain that the amplitude of the galloping frequency component and the galloping amplitude present a very good linear relationship, as shown in fig. 7, when the line current is constant, the amplitude of the frequency component corresponding to the galloping coupled by the ground line electromagnetic signal can correspond to the galloping amplitude one to one. As shown in fig. 8, when the ground line operation mode is the ordinary ground line sectional insulation and the OPGW grounds tower by tower, the phase of the related frequency component superimposed on the ground line induced current during waving changes approximately linearly when the related frequency component propagates along the line, so that according to the characteristics, the monitoring devices are distributed, and the gear at which waving occurs is determined through the subsequent algorithm processing. As shown in fig. 9, the amplitude of the signal corresponding to the dancing frequency also attenuates when traveling along the line. The galloping amplitude is obtained by fitting, the galloping amplitude is exponentially attenuated along the line, for a fixed line, the parameters in the exponential attenuation expression are constant, and the galloping amplitude at the galloping position can be reversely deduced by utilizing the interval step number of the monitoring device and the galloping position based on the law after the galloping position is obtained by judgment.
According to the embodiment of the application, the relevant parameters of the overhead line are obtained to construct the equivalent circuit of the ground wire, and the current or voltage in the ground wire is further monitored in real time, so that the positioning of the line galloping is realized. According to the embodiment of the application, the monitoring device does not need to be installed step by step when the galloping is positioned, and the cost of galloping monitoring and positioning is greatly reduced.
Fig. 2 is a flowchart of a method for positioning an overhead line galloping based on a ground line electromagnetic signal according to an embodiment of the present application, where, as shown in fig. 2, step 104 further includes the following steps:
In this embodiment, when the waving frequency component appears on the ground wire, the frequency and amplitude of the frequency component corresponding to the waving can be calculated through the matched data processing and communication module.
In this embodiment, as shown in fig. 5 and 6, when the wire is waved, the electromagnetic signal induced on the ground line will appear corresponding to 50 ± fcFrequency component of Hz, whereincThe frequency of conductor waving. That is, if the waving occurs, two non-fundamental frequency components which are significantly higher than other frequencies are found during monitoring, and two important parameters of the frequency components are amplitude and phase, so that obtaining phase information means calculating 50 ± fcPhase of frequency component of Hz。
And step 203, determining the position of the line galloping according to the signal phase information.
In this embodiment, when the ground wire is operated in a manner of common ground wire segment insulation and OPGW tower-by-tower grounding, the phase of the relevant frequency component superimposed on the ground wire induced current during galloping changes approximately linearly when the relevant frequency component propagates along the line, so that the location where the galloping occurs can be determined by installing a distributed arrangement monitoring device and subsequent algorithm processing according to the characteristics.
And step 204, calculating the galloping amplitude according to the line galloping position.
In this embodiment, as shown in fig. 9, the waving amplitude is exponentially attenuated along the line, and for a fixed line, the parameters in the exponential attenuation expression are fixed, and after the waving interval is obtained, the waving amplitude can be determined according to the mathematical expression.
Optionally, an alarm is issued when the calculated waving amplitude exceeds a preset threshold.
According to the embodiment of the application, the extra frequency component generated by waving in the line is obtained according to the electromagnetic signal to obtain the frequency of conductor waving, the waving positioning in the line is completed according to the propagation rule of the waving frequency component along the line, the amplitude of the line waving is obtained according to the waving positioning, the waving positioning is realized, meanwhile, a monitoring device does not need to be installed step by step, and the waving monitoring and positioning cost is greatly reduced.
Fig. 3 is a flowchart of a method for positioning an overhead line galloping based on a ground line electromagnetic signal according to an embodiment of the present application, where, as shown in fig. 3, step 203 further includes:
In this embodiment, the position of the device that monitors the largest characteristic frequency component is the position closest to the line dancing position.
And step 303, determining the position of the line galloping according to the characteristic signal phase along-line propagation rule obtained based on the ground wire equivalent circuit.
As shown in fig. 8, when the ground line operation mode is the ordinary ground line sectional insulation and the OPGW is grounded tower by tower, the phase of the relevant frequency component superimposed on the ground line induced current during galloping changes approximately linearly when the frequency component propagates along the line, so that the position where galloping occurs can be determined by the distributed arrangement monitoring device and subsequent algorithm processing according to the characteristics.
Optionally, there are some examples, if one monitoring device is installed in every third gear, including:
if the phases of the characteristic components monitored by the two adjacent monitoring devices are the same, the waving is indicated to occur in the middle gear of the two monitoring devices;
if the phase difference between the signal monitored by a certain monitoring device and the signals of the devices on the two sides of the certain monitoring device is the same, the situation that the waving happens in the gear is indicated.
Alternatively, it is assumed that the range is waved for a plurality of steps. Defining k as the lag value of each step along the line of the dancing characteristic signal, fig. 10 is a schematic diagram of positioning of multi-step dancing, as shown in fig. 10:
taking the example of arranging one monitoring device in every third gear, if the phase difference of current signals corresponding to the galloping frequency monitored by the monitoring device 1 and the monitoring device 2 is between 2k and 3k, the starting point of the galloping is the 3 rd gear pitch; similarly, if the phase difference of the current signals corresponding to the waving frequencies monitored by the monitoring device 3 and the monitoring device 2 is between k and 2k, the terminal point of the waving is the 6 th span. Thus, a waving interval as shown by a red segment in the figure is determined.
In the embodiment, the position of the line galloping is determined by monitoring the position of the device with the largest characteristic frequency component, the galloping is positioned without installing monitoring devices step by step, and the cost of galloping monitoring and positioning is greatly reduced.
Fig. 4 is a block diagram of an overhead line galloping positioning device 400 based on ground line electromagnetic signals according to an embodiment of the present application. Referring to fig. 4, the apparatus includes a signal spectrum analysis module 410, an abnormal signal analysis module 420, a data analysis module 430 and an early warning module 440.
A signal spectrum analysis module 410, configured to monitor an electromagnetic signal on the ground line in real time and perform spectrum analysis on the electromagnetic signal;
the abnormal signal analysis module 420 is configured to send a frequency abnormal signal to the data processing terminal when the frequency abnormal signal occurs in the spectrum analysis, and generate an analysis result;
and the data analysis module 430 is used for determining the frequency, the position and the amplitude of the line waving according to the analysis result.
Optionally, the electromagnetic signal on the ground line includes at least one of:
voltage at two ends of the sectional ground wire insulator;
induced current on the optical fiber composite overhead ground wire OPGW.
Optionally, the analyzed abnormal frequency signal represents a coupling of ground line induced voltage or ground line induced current to a galloping frequency component, wherein the galloping frequency component is an additional low-frequency component coupled to the power frequency electromagnetic induction signal when the position of the wire in the vertical direction changes.
Optionally, the determining the interval and the amplitude of the line waving according to the analysis result includes:
determining the conductor galloping frequency;
acquiring phase information of frequency components corresponding to the waving according to the frequency of the waving of the conductor;
determining the line waving position according to the phase information;
and calculating the galloping amplitude according to the galloping position.
Optionally, the determining the position of the line galloping according to the phase information includes:
determining a location of the device that monitors the largest characteristic frequency component;
comparing the phases of the characteristic frequencies monitored by the device and the adjacent devices on the two sides of the device;
and determining the position of the line galloping according to the line propagation rule of the characteristic signal phase obtained based on the ground wire equivalent circuit.
Optionally, the calculating the waving amplitude according to the position of the line waving includes: after the galloping position is obtained, the galloping amplitude at the galloping position can be deduced based on the law that the galloping amplitude exponentially attenuates along the line.
An early warning module 440 for issuing an alarm when the calculated dancing amplitude result exceeds a set threshold
According to the embodiment of the application, the relevant parameters of the overhead line are obtained to construct the equivalent circuit of the ground wire, and the voltage or the current on the ground wire is further monitored, so that the positioning of the line galloping is realized. The embodiment of the application can avoid installing the monitoring device step by step when the line is waved, and greatly reduces the cost of monitoring and positioning the waving.
Fig. 11 is a schematic layout diagram of a single device on a line according to an embodiment of the present application. Referring to fig. 11, the apparatus includes at least one of: current transformers and voltage transformers.
In this embodiment, the current transformer is used to monitor the induced current on the OPGW, and the voltage sensor is used to detect the voltages at the two ends of the segment ground insulator.
Fig. 12 is a block diagram of an overhead line galloping positioning algorithm based on a ground line electromagnetic signal according to an embodiment of the application.
The concrete implementation steps are as follows: voltage or current monitoring devices are distributed on the overhead ground wire in a distributed mode, and the sensing voltage or the sensing current on the ground wire is monitored in real time by combining matched data processing and communication modules;
when the ground wire induction voltage or induction current is coupled with the galloping frequency component, data are sent to a data processing end;
determining the interval of the galloping and the frequency and amplitude of the galloping according to a galloping recognition and positioning algorithm;
and when the waving amplitude exceeds a certain threshold value, giving an alarm.
Fig. 13 illustrates a schematic block diagram of an example electronic device 1300 that can be used to implement embodiments of the present disclosure. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the disclosure described and/or claimed herein.
As shown in fig. 13, the device 13 includes a computing unit 1301 that can perform various appropriate actions and processes according to a computer program stored in a Read Only Memory (ROM)1302 or a computer program loaded from a storage unit 1308 into a Random Access Memory (RAM) 1303. In the RAM1303, various programs and data necessary for the operation of the device 1300 can also be stored. The calculation unit 1301, the ROM 1302, and the RAM1303 are connected to each other via a bus 1304. An input/output (I/O) interface 1305 is also connected to bus 1306.
A number of components in the device 1300 connect to the I/O interface 1305, including: an input unit 1306 such as a keyboard, a mouse, or the like; an output unit 1307 such as various types of displays, speakers, and the like; storage unit 1308, such as a magnetic disk, optical disk, or the like; and a communication unit 1309 such as a network card, modem, wireless communication transceiver, etc. The communication unit 1309 allows the device 1300 to exchange information/data with other devices through a computer network such as the internet and/or various telecommunication networks.
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), Wide Area Networks (WANs), the internet, and blockchain networks.
The computer system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The Server can be a cloud Server, also called a cloud computing Server or a cloud host, and is a host product in a cloud computing service system, so as to solve the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service ("Virtual Private Server", or simply "VPS"). The server may also be a server of a distributed system, or a server incorporating a blockchain.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Claims (10)
1. A method for positioning the waving of an overhead line based on a ground wire electromagnetic signal is characterized by comprising the following steps:
step S1: acquiring relevant parameters of the overhead line, and constructing a ground wire equivalent circuit according to the relevant parameters;
step S2: monitoring an electromagnetic signal on a ground wire in real time and carrying out spectrum analysis on the electromagnetic signal;
step S3: when the frequency spectrum analysis generates a frequency abnormal signal, sending the frequency abnormal signal to a data processing end to generate an analysis result;
step S4: and determining the frequency, the position and the amplitude of the line waving according to the analysis result.
2. The method of claim 1, wherein the electromagnetic signal on the ground line comprises at least one of:
voltage at two ends of the sectional ground wire insulator;
induced current on the optical fiber composite overhead ground wire OPGW.
3. The method of claim 1, wherein the analyzed abnormal frequency signal represents a ground line induced voltage or a ground line induced current coupled galloping frequency component, wherein the galloping frequency component is an additional low frequency component coupled to the power frequency electromagnetic induction signal when a vertical position of the conductor is changed.
4. The method of claim 1, wherein said determining the frequency, location and magnitude of line waving from said analysis comprises:
determining the conductor galloping frequency;
acquiring phase information of signal frequency components generated by corresponding galloping according to the conductor galloping frequency;
determining the line waving position according to the phase information;
and calculating the galloping amplitude according to the line galloping position.
5. The method of claim 4, wherein determining the location where the line waving occurs based on the phase information comprises:
determining a location of the device that monitors the largest characteristic frequency component;
comparing the phases of the characteristic frequencies monitored by the device and the adjacent devices on the two sides of the device;
and determining the position of the line galloping according to the line propagation rule of the characteristic signal phase obtained based on the ground wire equivalent circuit.
6. The method of claim 4, comprising said calculating a dancing magnitude from the position of the line dancing, comprising: after the galloping position is obtained, the galloping amplitude at the galloping position can be deduced based on the rule that the galloping amplitude is attenuated by a step-by-step index along the line.
7. The method of claim 1, further comprising:
and continuously repeating the steps S2, S3 and S4, and giving an alarm when the calculated galloping amplitude result exceeds a preset threshold value.
8. The utility model provides an overhead line galloping positioner based on ground wire electromagnetic signal which characterized in that includes:
the signal spectrum analysis module is used for monitoring the electromagnetic signal on the ground wire in real time and carrying out spectrum analysis on the electromagnetic signal;
the abnormal signal analysis module is used for sending a frequency abnormal signal to the data processing end when the frequency abnormal signal occurs in the frequency spectrum analysis and generating an analysis result;
and the data analysis module is used for determining the frequency, the position and the amplitude of the line galloping according to the analysis result.
And the early warning module is used for giving an alarm when the calculated galloping amplitude result exceeds a set threshold value.
9. An electronic device, comprising:
at least one processor;
and a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
10. A non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any one of claims 1-7.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111511460.7A CN114295196B (en) | 2021-12-06 | 2021-12-06 | Overhead line galloping positioning 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 |
| EP22902718.0A EP4446691A1 (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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