Method and device for monitoring aeolian vibration of power transmission line

Abstract

The invention provides a power transmission line aeolian vibration monitoring method and device, and belongs to the field of power transmission line monitoring. The method comprises the following steps: respectively acquiring an optical fiber transmission signal, an acceleration signal, a wind speed signal and an electromagnetic signal on a target power transmission line; determining a first aeolian vibration monitoring result according to the optical fiber transmission signal, and determining a second aeolian vibration monitoring result according to the acceleration signal; and determining the aeolian vibration monitoring result of the target power transmission line according to the first aeolian vibration monitoring result, the second aeolian vibration monitoring result, the electromagnetic signal and the wind speed signal. Influences of electromagnetic signals and power transmission line icing on aeolian vibration monitoring are considered, wind speed signals and the electromagnetic signals are used as correction signals, optical fiber transmission signals and acceleration signals are corrected, and a first aeolian vibration monitoring result and a second aeolian vibration monitoring result are combined for analysis, so that the aeolian vibration monitoring accuracy is improved. Therefore, the aeolian vibration monitoring result of the target power transmission line is determined, and the accuracy of aeolian vibration monitoring is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission line monitoring, and in particular to a method and device for monitoring breeze vibration of power transmission lines. Background Art

[0002] High-voltage overhead transmission lines are easily affected by meteorological conditions (such as strong winds, ice and snow, etc.) and human factors, which can cause failures, resulting in damage to transmission line equipment and affecting the safe operation of transmission lines. In severe cases, it can also lead to large-scale power supply paralysis, causing significant losses to the national economy. For example, breeze vibration caused by breeze is a common hidden danger on high-voltage overhead lines and the main cause of fatigue breakage of high-voltage overhead transmission lines.

[0003] Common breeze vibration monitoring methods include optical fiber detection, acceleration sensor detection, ultrasonic detection, and image detection. However, when the transmission line is covered with ice, it will affect the detection results of acceleration sensor detection and ultrasonic detection. In this case, it is difficult to detect whether the transmission line has breeze vibration through image detection. In order to monitor breeze vibration when the transmission line is covered with ice, optical fiber detection can be used at this stage, but optical fiber is affected by electromagnetic waves, the detection distance is limited, and the detection takes a long time.

[0004] Therefore, at this stage, there is an urgent need for an effective method for detecting breeze vibration of transmission lines. Summary of the invention

[0005] The embodiments of the present invention provide a method and device for monitoring breeze vibration of a transmission line, so as to provide an effective and accurate method for monitoring breeze vibration of a transmission line, and solve the problem that the current method for detecting breeze vibration of a transmission line is inaccurate.

[0006] In a first aspect, an embodiment of the present invention provides a method for monitoring breeze vibration of a transmission line, comprising:

[0007] Respectively obtain the optical fiber transmission signal, acceleration signal, wind speed signal and electromagnetic signal on the target transmission line;

[0008] Determine a first breeze vibration monitoring result according to the optical fiber transmission signal, and determine a second breeze vibration monitoring result according to the acceleration signal;

[0009] The breeze vibration monitoring result of the target transmission line is determined based on the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal.

[0010] In a possible implementation, determining the breeze vibration monitoring result of the target transmission line according to the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal includes:

[0011] determining a first vibration signal according to a first breeze vibration monitoring result;

[0012] determining a second vibration signal according to a second breeze vibration monitoring result;

[0013] Correcting the first vibration signal and the second vibration signal based on the electromagnetic signal and the wind speed signal to obtain corrected first vibration signal and second vibration signal;

[0014] The breeze vibration monitoring result of the target transmission line is determined according to the corrected first vibration signal and the corrected second vibration signal.

[0015] In a possible implementation, the first vibration signal and the second vibration signal are corrected based on the electromagnetic signal and the wind speed signal to obtain the corrected first vibration signal and the corrected second vibration signal, including:

[0016] Determine the first stress condition of the target transmission line at each moment according to the wind speed signal;

[0017] Determine the second stress condition of the target transmission line at each moment according to the electromagnetic signal;

[0018] Determine a comprehensive stress condition according to the first stress condition and the second stress condition;

[0019] The comprehensive stress condition is simulated to obtain the simulated vibration signal of the target transmission line;

[0020] The first vibration signal and the second vibration signal are respectively corrected based on the simulated vibration signal to obtain a corrected first vibration signal and a corrected second vibration signal.

[0021] In a possible implementation, the comprehensive stress condition is simulated to obtain a simulated vibration signal of the target transmission line, including:

[0022] Calculate the flow around the target transmission line and the comprehensive input power based on the comprehensive stress conditions;

[0023] The flow around the target transmission line and the comprehensive input power are simulated to obtain the simulated vibration signal of the target transmission line.

[0024] In a possible implementation, determining a breeze vibration monitoring result of a target transmission line according to the corrected first vibration signal and the corrected second vibration signal includes:

[0025] modulating the corrected first vibration signal and the corrected second vibration signal respectively so that the phases or amplitudes of the corrected first vibration signal and the corrected second vibration signal are consistent, and calculating a first error between the corrected first vibration signal and the corrected second vibration signal;

[0026] Based on the first error, a breeze vibration monitoring result of the target transmission line is determined.

[0027] In a possible implementation, determining a breeze vibration monitoring result of a target transmission line based on the first error includes:

[0028] Comparing the first error with a historical standard vibration signal to obtain a standard vibration signal;

[0029] Determine the breeze vibration monitoring result of the target transmission line according to the frequency and amplitude of the standard vibration signal;

[0030] Among them, the historical standard vibration signal is determined based on the historical optical fiber transmission signal, historical acceleration signal, historical wind speed signal and historical electromagnetic signal of the target transmission line.

[0031] In a possible implementation, the method further includes:

[0032] Acquire multiple groups of historical optical fiber transmission signals, historical acceleration signals, historical wind speed signals, and historical electromagnetic signals of the target transmission line within a preset time period;

[0033] Determine a historical first vibration signal according to a historical optical fiber transmission signal, and determine a historical second vibration signal according to a historical acceleration signal;

[0034] Correcting the historical first vibration signal and the historical second vibration signal based on the historical electromagnetic signal and the historical wind speed signal to obtain a corrected historical first vibration signal and a corrected historical second vibration signal, and calculating a first standard error and a second standard error corresponding to the corrected historical first vibration signal and the corrected historical second vibration signal;

[0035] Normalizing the corrected first historical vibration signal and the corrected second historical vibration signal respectively to obtain a normalized first historical vibration signal and a normalized second historical vibration signal;

[0036] The normalized historical second vibration signal is modulated based on the first standard error, the normalized historical first vibration signal is modulated based on the second standard error, and the modulated historical first vibration signal and the modulated historical second vibration signal are fitted to obtain a historical standard vibration signal.

[0037] In a possible implementation, determining a first breeze vibration monitoring result according to the optical fiber transmission signal includes:

[0038] Convert optical fiber transmission signals into optical fiber electrical signals;

[0039] The optical fiber electrical signal is modulated, and the vibration characteristics of the modulated optical fiber electrical signal are obtained to obtain a first breeze vibration monitoring result.

[0040] In a possible implementation, determining a second breeze vibration monitoring result according to the acceleration signal includes:

[0041] Convert the acceleration signal into an acceleration electrical signal;

[0042] The acceleration electrical signal is modulated, and the vibration characteristics of the modulated acceleration electrical signal are obtained to obtain a second breeze vibration monitoring result.

[0043] In a second aspect, an embodiment of the present invention provides a transmission line breeze vibration monitoring device, comprising:

[0044] An acquisition module is used to respectively acquire optical fiber transmission signals, acceleration signals, wind speed signals and electromagnetic signals on the target transmission line;

[0045] A determination module, used to determine a first breeze vibration monitoring result according to the optical fiber transmission signal, and to determine a second breeze vibration monitoring result according to the acceleration signal;

[0046] The monitoring module is used to determine the breeze vibration monitoring result of the target transmission line according to the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal.

[0047] The embodiment of the present invention provides a method and device for monitoring breeze vibration of a transmission line. Compared with the traditional method of using only one of optical fiber detection, acceleration sensor detection, ultrasonic detection and image detection for detection, the embodiment of the present invention takes into account that the essence of optical fiber detection and acceleration sensor detection is to convert the collected signal into an electrical signal for analysis. Therefore, according to this characteristic, the optical fiber transmission signal and the acceleration signal are combined for analysis. In addition, considering the influence of electromagnetic signals and ice covering of transmission lines on breeze vibration monitoring, the wind speed signal and the electromagnetic signal are used as correction signals to correct the optical fiber transmission signal and the acceleration signal. The first breeze vibration monitoring result and the second breeze vibration monitoring result are combined for analysis to determine the breeze vibration monitoring result of the target transmission line, thereby improving the accuracy of breeze vibration monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 is a flow chart of the implementation of the method for monitoring breeze vibration of a transmission line provided by an embodiment of the present invention;

[0050] Figure 2 It is a schematic diagram of the structure of a transmission line breeze vibration monitoring device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0052] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0053] Figure 1 The following is a flow chart of the method for monitoring the breeze vibration of a transmission line provided by the embodiment of the present invention. Figure 1 As shown, the method includes:

[0054] Step 110: respectively obtain the optical fiber transmission signal, acceleration signal, wind speed signal and electromagnetic signal on the target transmission line.

[0055] In this embodiment, optical signal detection equipment, acceleration detection equipment, wind speed detection equipment and electromagnetic signal detection equipment can be installed on the target transmission line to collect the optical fiber transmission signal, acceleration signal, wind speed signal and electromagnetic signal on the target transmission line. Exemplarily, the optical signal detection equipment can be an optical fiber composite overhead ground wire (OPGW), that is, an OPGW optical cable; the acceleration detection equipment can be an acceleration sensor; the wind speed detection equipment can be a wind speed and wind direction sensor; the electromagnetic signal detection equipment excitation unit, eddy current sensor, Hall sensor, excitation signal generator, etc.; since the detection device is not the focus of protection of this embodiment, in actual use, the corresponding detection equipment can be selected as needed, and no specific limitation is made here.

[0056] Step 120: Determine a first breeze vibration monitoring result according to the optical fiber transmission signal, and determine a second breeze vibration monitoring result according to the acceleration signal.

[0057] In this embodiment, the essence of the first breeze vibration monitoring result and the second breeze vibration monitoring result is to determine whether the target transmission line has breeze vibration according to the detected vibration amplitude and frequency of the target transmission line, so the first breeze vibration monitoring result and the second breeze vibration monitoring result can be characterized by the vibration characteristics obtained respectively. The vibration characteristics may include vibration period, vibration duration, vibration amplitude, vibration frequency and other characteristics that can reflect breeze vibration.

[0058] Accordingly, in order to obtain the first breeze vibration monitoring result and the second breeze vibration monitoring result, the optical fiber transmission signal and the acceleration signal can be converted into their respective corresponding electrical signals, and the corresponding electrical signals can be modulated to obtain the modulated optical fiber electrical signal and the acceleration electrical signal. The vibration characteristics of the modulated optical fiber electrical signal and the acceleration electrical signal are extracted respectively, and the extracted vibration characteristics are used to characterize the first breeze vibration monitoring result and the second breeze vibration monitoring result.

[0059] Step 130: Determine the breeze vibration monitoring result of the target transmission line according to the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal.

[0060] In this embodiment, theoretically, the first breeze vibration monitoring result and the second breeze vibration monitoring result should be the same. However, due to the interference of electromagnetic signals and the external environment, and due to aging, damage, etc. of the detection equipment, the first breeze vibration monitoring result and the second breeze vibration monitoring result may be inconsistent. This makes the breeze vibration detection result of the target transmission line inaccurate. To solve this problem, the embodiment of the present invention also considers the electromagnetic signal and the wind speed signal when determining the breeze vibration monitoring result of the target transmission line.

[0061] Accordingly, in an optional embodiment, determining the breeze vibration monitoring result of the target transmission line according to the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal in step 130 may include:

[0062] Step 131: Determine a first vibration signal according to the first breeze vibration monitoring result.

[0063] Step 132: Determine a second vibration signal according to the second breeze vibration monitoring result.

[0064] Step 133: Correct the first vibration signal and the second vibration signal based on the electromagnetic signal and the wind speed signal to obtain corrected first vibration signal and second vibration signal.

[0065] Step 134: Determine the breeze vibration monitoring result of the target transmission line based on the corrected first vibration signal and the corrected second vibration signal.

[0066] In this embodiment, since the first breeze vibration monitoring result and the second breeze vibration monitoring result essentially reflect whether there is breeze vibration in the target transmission line through vibration frequency and amplitude, the first breeze vibration monitoring result and the second breeze vibration monitoring result respectively include corresponding vibration signals, namely the first vibration signal and the second vibration signal.

[0067] In this embodiment, the electromagnetic signal is selected as the main factor from many influencing factors affecting breeze vibration monitoring, and considering that breeze vibration is caused by wind, the wind speed signal is used as a reference, and the first vibration signal and the second vibration signal are corrected according to the electromagnetic signal and the wind speed signal respectively to obtain the corrected first vibration signal and the second vibration signal, so as to determine the breeze vibration monitoring result of the target transmission line based on the corrected first vibration signal and the corrected second vibration signal.

[0068] In an optional embodiment, in step 133, the first vibration signal and the second vibration signal are corrected based on the electromagnetic signal and the wind speed signal to obtain the corrected first vibration signal and the corrected second vibration signal, which may include:

[0069] Step 133.1: Determine the first stress condition of the target transmission line at each moment according to the wind speed signal.

[0070] Step 133.2: Determine the second stress condition of the target transmission line at each moment according to the electromagnetic signal.

[0071] Step 133.3: Determine a comprehensive stress condition based on the first stress condition and the second stress condition.

[0072] Step 133.4: Simulate the comprehensive stress condition to obtain a simulated vibration signal of the target transmission line.

[0073] Step 133.5: Correct the first vibration signal and the second vibration signal respectively based on the simulated vibration signal to obtain a corrected first vibration signal and a corrected second vibration signal.

[0074] In this embodiment, the wind speed signal may include the horizontal wind speed, vertical wind speed, wind volume and wind direction corresponding to each moment. Based on this information, force analysis and corresponding analysis and calculation are performed to determine the first force condition of the target transmission line at each moment, that is, the force magnitude and force direction at each moment.

[0075] The presence of electromagnetic signals will cause the target transmission line to receive three different forces, including the Ampere force generated by the target transmission line and its adjacent transmission lines due to the interaction of currents, the force of the geomagnetic field on the current-carrying conductor (target transmission line), and the electrostatic interaction force generated by the target transmission line and its adjacent transmission lines. A comprehensive analysis of the three forces is performed to obtain the second force condition of the target transmission line at each moment. Correspondingly, the second force condition also includes the force magnitude and force direction at each moment.

[0076] Here, in order to distinguish, the force in the first stress condition can be called tension, the force in the second stress condition can be called electromagnetic force, and the comprehensive stress condition is the composite tension obtained after stress analysis of the tension and electromagnetic force borne by the target transmission line at any moment.

[0077] The composite tension in the comprehensive stress condition is used as the measured wind force borne by the target transmission line for simulation, and a simulated vibration signal of the target transmission line is obtained, and the simulated vibration signal is used as a reference to correct the first vibration signal and the second vibration signal respectively, and the correction includes but is not limited to eliminating abnormal values, supplementing missing values, calibrating error values, etc. of the first vibration signal and the second vibration signal based on the frequency and amplitude of the simulated vibration signal, so as to obtain the corrected first vibration signal and the corrected second vibration signal. Of course, considering that the vibration signals obtained by different methods may be different, the simulated vibration signal needs to be modulated according to a preset ratio before correction to adapt to the first vibration signal and the second vibration signal.

[0078] In an optional embodiment, the step 133.4 of simulating the comprehensive stress condition to obtain a simulated vibration signal of the target transmission line may include:

[0079] The flow around the target transmission line and the comprehensive input power are calculated based on the comprehensive stress conditions.

[0080] The flow around the target transmission line and the comprehensive input power are simulated to obtain the simulated vibration signal of the target transmission line.

[0081] In this embodiment, the most important thing in simulating and analyzing breeze vibration is to determine the wind energy input power (i.e., the comprehensive input power). Since wind force is an incompressible viscous fluid, this embodiment can analyze its motion law in a rectangular coordinate system, adopt the continuity equation, momentum equation, and computational fluid dynamics (CFD) model, solve the continuity equation and momentum equation, and use the CFD model to simulate the Karman vortex street effect of the target transmission line in the flow field to obtain the flow around and comprehensive input power of the target transmission line under the comprehensive force condition. Then, based on the flow around and comprehensive input power, the simulated vibration signal of the target transmission line under the comprehensive force condition is obtained.

[0082] In an optional embodiment, determining the breeze vibration monitoring result of the target transmission line according to the corrected first vibration signal and the corrected second vibration signal in step 134 may include:

[0083] Step 134.1: modulate the corrected first vibration signal and the corrected second vibration signal respectively to make the phase or amplitude of the corrected first vibration signal and the corrected second vibration signal consistent, and calculate the first error between the corrected first vibration signal and the corrected second vibration signal.

[0084] Step 134.2: Based on the first error, determine the breeze vibration monitoring result of the target transmission line.

[0085] In this embodiment, the modified first vibration signal and the modified second vibration signal can be modulated with either phase or amplitude as the modulation standard. If the phase is used as the modulation standard, the first error is the amplitude error, and if the amplitude is used as the modulation standard, the first error is the phase error.

[0086] After determining the first error, in order to determine the breeze vibration monitoring result of the target transmission line, in an optional embodiment, determining the breeze vibration monitoring result of the target transmission line based on the first error in step 134.2 may include:

[0087] The first error is compared with a historical standard vibration signal to obtain a standard vibration signal.

[0088] The breeze vibration monitoring results of the target transmission line are determined based on the frequency and amplitude of the standard vibration signal.

[0089] Among them, the historical standard vibration signal is determined based on the historical optical fiber transmission signal, historical acceleration signal, historical wind speed signal and historical electromagnetic signal of the target transmission line.

[0090] In this embodiment, the historical standard vibration signal is used as a reference, and the historical standard vibration signal is adjusted by the first error to obtain a standard vibration signal. If the change frequency of the standard vibration signal is greater than the first preset threshold and the amplitude is less than the second preset threshold, it is determined that there is breeze vibration in the target transmission line.

[0091] In addition, since breeze vibration is related to wind volume, the historical standard vibration signal can be determined based on the typical day. Accordingly, before applying the historical standard vibration signal, it is necessary to analyze the monitoring day corresponding to the target transmission line to determine the typical day described in the monitoring day.

[0092] In an optional embodiment, the historical standard vibration signal can be determined by:

[0093] Acquire multiple groups of historical optical fiber transmission signals, historical acceleration signals, historical wind speed signals, and historical electromagnetic signals of the target transmission line within a preset time period.

[0094] A historical first vibration signal is determined according to the historical optical fiber transmission signal, and a historical second vibration signal is determined according to the historical acceleration signal.

[0095] The historical first vibration signal and the historical second vibration signal are corrected based on the historical electromagnetic signal and the historical wind speed signal to obtain a corrected historical first vibration signal and a corrected historical second vibration signal, and a first standard error and a second standard error corresponding to the corrected historical first vibration signal and the corrected historical second vibration signal are calculated.

[0096] The corrected historical first vibration signal and the corrected historical second vibration signal are respectively normalized to obtain a normalized historical first vibration signal and a normalized historical second vibration signal.

[0097] The normalized historical second vibration signal is modulated based on the first standard error, the normalized historical first vibration signal is modulated based on the second standard error, and the modulated historical first vibration signal and the modulated historical second vibration signal are fitted to obtain a historical standard vibration signal.

[0098] In this embodiment, for the target transmission line, the historical data of its typical day can be obtained to determine the historical standard vibration signal of each type of typical day. The historical standard vibration signal of each typical day can be confirmed by the following methods:

[0099] Acquire multiple groups of historical optical fiber transmission signals, historical acceleration signals, historical wind speed signals, and historical electromagnetic signals of the target transmission line within a preset time period, wherein the steps of preprocessing each group of historical data to obtain a corrected historical first vibration signal and a corrected historical second vibration signal can refer to other related embodiments and will not be repeated here.

[0100] The standard errors corresponding to the corrected historical first vibration signal and the corrected historical second vibration signal are calculated respectively, namely the first standard error and the second standard error. The standard error includes the amplitude standard error and the phase standard error. Taking the amplitude error in the first standard error as an example, for any moment, the amplitude standard error of each group of corrected historical first vibration signals at that moment is calculated, and the obtained amplitude standard errors are averaged to obtain the first standard error at that moment.

[0101] The plurality of groups of corrected historical first vibration signals and corrected historical second vibration signals are respectively normalized to obtain a corrected historical first vibration signal and a corrected historical second vibration signal. The normalized historical second vibration signal is modulated based on the first standard error, the normalized historical first vibration signal is modulated based on the second standard error, and the modulated historical first vibration signal and the modulated historical second vibration signal are fitted to obtain a historical standard vibration signal.

[0102] In summary, the embodiment of the present invention provides a method and device for monitoring breeze vibration of a transmission line. Compared with the traditional method of using only one of optical fiber detection, acceleration sensor detection, ultrasonic detection and image detection for detection, the embodiment of the present invention takes into account that the essence of optical fiber detection and acceleration sensor detection is to convert the collected signal into an electrical signal for analysis. Therefore, according to this characteristic, the optical fiber transmission signal and the acceleration signal are combined for analysis. In addition, considering the influence of electromagnetic signals and transmission line icing on breeze vibration monitoring, the wind speed signal and the electromagnetic signal are used as correction signals to correct the optical fiber transmission signal and the acceleration signal. The first breeze vibration monitoring result and the second breeze vibration monitoring result are combined for analysis to determine the breeze vibration monitoring result of the target transmission line, thereby improving the accuracy of breeze vibration monitoring.

[0103] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0104] The following is an embodiment of the device of the present invention. For details not described in detail therein, reference may be made to the corresponding method embodiment described above.

[0105] Figure 2The structure diagram of the breeze vibration monitoring device for a transmission line provided by an embodiment of the present invention is shown. For the convenience of explanation, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:

[0106] like Figure 2 As shown, the transmission line breeze vibration monitoring device 2 includes:

[0107] The acquisition module 21 is used to respectively acquire the optical fiber transmission signal, acceleration signal, wind speed signal and electromagnetic signal on the target transmission line;

[0108] A determination module 22, configured to determine a first breeze vibration monitoring result according to the optical fiber transmission signal, and to determine a second breeze vibration monitoring result according to the acceleration signal;

[0109] The monitoring module 23 is used to determine the breeze vibration monitoring result of the target transmission line according to the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal.

[0110] In a possible implementation, the monitoring module 23 is specifically configured to:

[0111] determining a first vibration signal according to a first breeze vibration monitoring result;

[0112] determining a second vibration signal according to a second breeze vibration monitoring result;

[0113] Correcting the first vibration signal and the second vibration signal based on the electromagnetic signal and the wind speed signal to obtain corrected first vibration signal and second vibration signal;

[0114] The breeze vibration monitoring result of the target transmission line is determined according to the corrected first vibration signal and the corrected second vibration signal.

[0115] In a possible implementation, the monitoring module 23 is specifically configured to:

[0116] Determine the first stress condition of the target transmission line at each moment according to the wind speed signal;

[0117] Determine the second stress condition of the target transmission line at each moment according to the electromagnetic signal;

[0118] Determine a comprehensive stress condition according to the first stress condition and the second stress condition;

[0119] The comprehensive stress condition is simulated to obtain the simulated vibration signal of the target transmission line;

[0120] The first vibration signal and the second vibration signal are respectively corrected based on the simulated vibration signal to obtain a corrected first vibration signal and a corrected second vibration signal.

[0121] In a possible implementation, the monitoring module 23 is specifically configured to:

[0122] Calculate the flow around the target transmission line and the comprehensive input power based on the comprehensive stress conditions;

[0123] The flow around the target transmission line and the comprehensive input power are simulated to obtain the simulated vibration signal of the target transmission line.

[0124] In a possible implementation, determining a breeze vibration monitoring result of a target transmission line according to the corrected first vibration signal and the corrected second vibration signal includes:

[0125] modulating the corrected first vibration signal and the corrected second vibration signal respectively so that the phases or amplitudes of the corrected first vibration signal and the corrected second vibration signal are consistent, and calculating a first error between the corrected first vibration signal and the corrected second vibration signal;

[0126] Based on the first error, a breeze vibration monitoring result of the target transmission line is determined.

[0127] In a possible implementation, the monitoring module 23 is specifically configured to:

[0128] Comparing the first error with a historical standard vibration signal to obtain a standard vibration signal;

[0129] Determine the breeze vibration monitoring result of the target transmission line according to the frequency and amplitude of the standard vibration signal;

[0130] Among them, the historical standard vibration signal is determined based on the historical optical fiber transmission signal, historical acceleration signal, historical wind speed signal and historical electromagnetic signal of the target transmission line.

[0131] In a possible implementation, the acquisition module 21 is further used to acquire multiple groups of historical optical fiber transmission signals, historical acceleration signals, historical wind speed signals, and historical electromagnetic signals of the target transmission line within a preset time period;

[0132] The determination module 22 is further used to determine a historical first vibration signal according to the historical optical fiber transmission signal, and to determine a historical second vibration signal according to the historical acceleration signal;

[0133] The monitoring module 23 is further used to correct the historical first vibration signal and the historical second vibration signal based on the historical electromagnetic signal and the historical wind speed signal to obtain a corrected historical first vibration signal and a corrected historical second vibration signal, and calculate a first standard error and a second standard error corresponding to the corrected historical first vibration signal and the corrected historical second vibration signal;

[0134] Normalizing the corrected first historical vibration signal and the corrected second historical vibration signal respectively to obtain a normalized first historical vibration signal and a normalized second historical vibration signal;

[0135] The normalized historical second vibration signal is modulated based on the first standard error, the normalized historical first vibration signal is modulated based on the second standard error, and the modulated historical first vibration signal and the modulated historical second vibration signal are fitted to obtain a historical standard vibration signal.

[0136] In a possible implementation, the determination module 22 is specifically configured to:

[0137] Convert optical fiber transmission signals into optical fiber electrical signals;

[0138] The optical fiber electrical signal is modulated, and the vibration characteristics of the modulated optical fiber electrical signal are obtained to obtain a first breeze vibration monitoring result.

[0139] In a possible implementation, the determination module 22 is specifically configured to:

[0140] Convert the acceleration signal into an acceleration electrical signal;

[0141] The acceleration electrical signal is modulated, and the vibration characteristics of the modulated acceleration electrical signal are obtained to obtain a second breeze vibration monitoring result.

[0142] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0143] Those of ordinary skill in the art will appreciate that the templates, units, and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0144] If the module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, it can implement the steps of the above-mentioned various power transmission line breeze vibration monitoring method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0145] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for monitoring breeze vibration of a transmission line, characterized in that: include: Respectively obtain the optical fiber transmission signal, acceleration signal, wind speed signal and electromagnetic signal on the target transmission line; Determine a first breeze vibration monitoring result according to the optical fiber transmission signal, and determine a second breeze vibration monitoring result according to the acceleration signal; The breeze vibration monitoring result of the target transmission line is determined according to the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal.

2. The method for monitoring breeze vibration of a transmission line according to claim 1, characterized in that: The step of determining the breeze vibration monitoring result of the target transmission line according to the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal comprises: determining a first vibration signal according to the first breeze vibration monitoring result; determining a second vibration signal according to the second breeze vibration monitoring result; Correcting the first vibration signal and the second vibration signal based on the electromagnetic signal and the wind speed signal to obtain corrected first vibration signal and second vibration signal; The breeze vibration monitoring result of the target transmission line is determined according to the corrected first vibration signal and the corrected second vibration signal.

3. The method for monitoring breeze vibration of a transmission line according to claim 2, characterized in that: The correcting the first vibration signal and the second vibration signal based on the electromagnetic signal and the wind speed signal to obtain a corrected first vibration signal and a corrected second vibration signal includes: Determine a first stress condition of the target transmission line at each moment according to the wind speed signal; Determine a second stress condition of the target transmission line at each moment according to the electromagnetic signal; determining a comprehensive stress condition according to the first stress condition and the second stress condition; Simulating the comprehensive stress condition to obtain a simulated vibration signal of the target transmission line; The first vibration signal and the second vibration signal are respectively corrected based on the simulated vibration signal to obtain a corrected first vibration signal and a corrected second vibration signal.

4. The method for monitoring breeze vibration of a transmission line according to claim 3, characterized in that: The simulating the comprehensive stress condition to obtain the simulated vibration signal of the target transmission line includes: Calculate the flow around the target transmission line and the comprehensive input power based on the comprehensive stress condition; The flow around the target transmission line and the comprehensive input power are simulated to obtain a simulated vibration signal of the target transmission line.

5. The method for monitoring breeze vibration of a transmission line according to claim 2, characterized in that: Determining the breeze vibration monitoring result of the target transmission line according to the corrected first vibration signal and the corrected second vibration signal includes: modulating the corrected first vibration signal and the corrected second vibration signal respectively so that the phases or amplitudes of the corrected first vibration signal and the corrected second vibration signal are consistent, and calculating a first error between the corrected first vibration signal and the corrected second vibration signal; Based on the first error, a breeze vibration monitoring result of the target transmission line is determined.

6. The method for monitoring breeze vibration of a transmission line according to claim 5, characterized in that: The step of determining the breeze vibration monitoring result of the target transmission line based on the first error includes: Comparing the first error with a historical standard vibration signal to obtain a standard vibration signal; Determining a breeze vibration monitoring result of the target transmission line according to the frequency and amplitude of the standard vibration signal; Wherein, the historical standard vibration signal is determined based on the historical optical fiber transmission signal, historical acceleration signal, historical wind speed signal and historical electromagnetic signal of the target transmission line.

7. The method for monitoring breeze vibration of a transmission line according to claim 1, characterized in that: The method further comprises: Acquire multiple groups of historical optical fiber transmission signals, historical acceleration signals, historical wind speed signals, and historical electromagnetic signals of the target transmission line within a preset time period; Determine a historical first vibration signal according to the historical optical fiber transmission signal, and determine a historical second vibration signal according to the historical acceleration signal; Correcting the historical first vibration signal and the historical second vibration signal based on the historical electromagnetic signal and the historical wind speed signal to obtain a corrected historical first vibration signal and a corrected historical second vibration signal, and calculating a first standard error and a second standard error corresponding to the corrected historical first vibration signal and the corrected historical second vibration signal; Normalizing the corrected first historical vibration signal and the corrected second historical vibration signal respectively to obtain a normalized first historical vibration signal and a normalized second historical vibration signal; The normalized historical second vibration signal is modulated based on the first standard error, the normalized historical first vibration signal is modulated based on the second standard error, and the modulated historical first vibration signal and the modulated historical second vibration signal are fitted to obtain a historical standard vibration signal.

8. The method for monitoring breeze vibration of a transmission line according to claim 1, characterized in that: The determining of the first breeze vibration monitoring result according to the optical fiber transmission signal comprises: Converting the optical fiber transmission signal into an optical fiber electrical signal; The optical fiber electrical signal is modulated, and the vibration characteristics of the modulated optical fiber electrical signal are acquired to obtain a first breeze vibration monitoring result.

9. The method for monitoring breeze vibration of a power transmission line according to claim 1, characterized in that: Determining a second breeze vibration monitoring result according to the acceleration signal includes: Converting the acceleration signal into an acceleration electrical signal; The acceleration electrical signal is modulated, and the vibration characteristics of the modulated acceleration signal are acquired to obtain a second breeze vibration monitoring result.

10. A transmission line breeze vibration monitoring device, characterized in that: include: An acquisition module, used to respectively acquire optical fiber transmission signals, acceleration signals, wind speed signals and electromagnetic signals on the target transmission line; a determination module, used to determine a first breeze vibration monitoring result according to the optical fiber transmission signal, and to determine a second breeze vibration monitoring result according to the acceleration signal; A monitoring module is used to determine the breeze vibration monitoring result of the target transmission line according to the first breeze vibration monitoring result, the second breeze vibration monitoring result, the electromagnetic signal and the wind speed signal.

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