Icing galloping monitoring and early warning device and method for transmission lines

Abstract

The present invention relates to the field of signal warning devices, and specifically to an ice-covered dancing monitoring and early warning device and method for power transmission lines, comprising: analyzing the ice compression force exerted on the surface of the transmission line during different periods, and screening out several high-efficiency icing periods; analyzing the irregular vibration of the transmission line during dancing during different high-efficiency icing periods, filtering out some frequency interference signals contained in the line vibration sequence, and obtaining low-frequency and high-frequency signals; comparing the content of high-frequency and low-frequency signals during different high-efficiency icing periods of the transmission line, and obtaining the effective low-frequency occupancy of the line; and comprehensively analyzing the pressure-bearing capacity of the metal inside the line during dancing during different high-efficiency icing periods based on the hardness of the ice covering the outer skin of the line, and performing ice-covered dancing monitoring and early warning. The present invention improves the timeliness and accuracy of detection and early warning.

Description

Technical Field

[0001] The present invention relates to the field of signal warning devices, and in particular to an ice dancing monitoring and warning device and method for power transmission lines. Background Art

[0002] Ice dance refers to the phenomenon of transmission line vibration caused by uneven ice and snow adhesion to conductors and other equipment during icy and snowy weather. This increases the load and weight of the line. This vibration is typically caused by factors such as wind and the accumulation of ice and snow, and can pose safety risks to transmission lines, such as conductor breakage, equipment damage, and even widespread power outages. Therefore, monitoring and early warning of ice dance are crucial components of transmission line management.

[0003] When existing technologies monitor transmission lines by installing sensors, extreme weather factors can easily produce ice coverage stages of varying thicknesses, causing vibrations of varying amplitudes between transmission lines and generating varying electromagnetic interference. This interferes with the ability to distinguish metal conductor losses within the transmission lines, reducing the accuracy of early warning results. Summary of the Invention

[0004] The present invention provides an ice dancing monitoring and early warning device and method for power transmission lines, so as to solve the technical problem of low accuracy of early warning results.

[0005] The present invention adopts the following technical solutions for the monitoring and early warning method of ice dancing on power transmission lines:

[0006] The following steps are involved:

[0007] Acquire a line external pressure sequence and a line vibration sequence of a transmission line in different periods; the line external pressure sequence includes a plurality of line pressure signals, and the line vibration sequence includes a plurality of line vibration signals;

[0008] Based on the line pressure signal in the line external pressure sequence, the ice compression force on the transmission line surface at different periods is analyzed to obtain the ice hardness of the transmission line surface at different periods; based on the ice hardness of the transmission line surface, several high-efficiency icing periods are selected from different periods;

[0009] Based on several line vibration signals in the line vibration sequence, the irregular vibration of the transmission line during the galloping in different high-efficiency icing periods is analyzed, and some frequency interference signals contained in the line vibration sequence are filtered to obtain several low-frequency signals and several high-frequency signals of the transmission line during different high-efficiency icing periods; the content between the high-frequency and low-frequency signals of the transmission line during different high-efficiency icing periods is compared to obtain the line low-frequency effective occupancy rate of the transmission line during different high-efficiency icing periods; based on the hardness of the ice coating on the line skin and the line low-frequency effective occupancy rate, the pressure bearing capacity of the internal metal of the transmission line during the galloping in different high-efficiency icing periods is comprehensively analyzed to obtain the internal metal pressure bearing capacity of the transmission line during different high-efficiency icing periods;

[0010] Based on the internal metal pressure-bearing load capacity, ice dancing monitoring and early warning are carried out on transmission lines during different high-efficiency icing periods.

[0011] Preferably, the method for obtaining the ice hardness of the line outer skin is:

[0012] For the line external pressure sequence in any period, the pressure fluctuation directions between adjacent elements in the line external pressure sequence are compared to obtain the ice cover pressure direction index of the line external pressure sequence in the period.

[0013] If the transmission line is The ice cover pressure direction index in the period is less than 0, then the transmission line The calculation formula for the ice hardness of the line skin in a period is: If the transmission line is The ice cover pressure direction index in the period is equal to 0, then the transmission line The calculation formula for the ice hardness of the line skin in a period is: If the transmission line is The ice cover pressure direction index in the period is greater than 0, then the transmission line The calculation formula for the ice hardness of the line skin in a period is: ;

[0014] in, Indicates that the transmission line The hardness of ice covering on the line skin during a certain period; Indicates that the transmission line The cumulative sum of all line pressure signals in the line external pressure sequence within a period; Indicates that the transmission line An indicator of the direction of ice cover pressure during a period; Represents the normalization function.

[0015] Preferably, the method for obtaining the ice layer pressure direction indicator is:

[0016] ;

[0017] Where, Indicates that the transmission line An indicator of the direction of ice cover pressure during a period; Indicates that the transmission line The number of all line pressure signals in the line external pressure sequence within a period; Indicates that the transmission line The first A line pressure signal; Indicates that the transmission line The first A line pressure signal; Represents a symbolic function.

[0018] Preferably, the method for obtaining the efficient icing period is:

[0019] A line skin icing hardness threshold is preset, and a period when the line skin icing hardness is greater than the line skin icing hardness threshold is used as an efficient icing period.

[0020] Preferably, the method for acquiring the low-frequency signal and the high-frequency signal is:

[0021] In the In the line vibration sequence within the high-efficiency icing period, each preset number of line vibration signals is divided into a local line vibration sequence; The frequency signal with the largest energy value in the local line vibration sequence is taken as the The vibration energy representative signal of the local line vibration sequence is obtained according to the vibration energy representative signal. The vibration signal deviation of each local line vibration sequence in the high-efficiency icing period is calculated; according to the vibration signal deviation, the local line vibration sequence is filtered and processed to obtain the transmission line in the first The signal sequence to be distinguished by frequency in the high-efficiency icing period; the transmission line in the During an efficient icing period, each frequency signal in all the signal sequences to be frequency-differentiated is normalized, and the normalized frequency signal is used as the frequency normalization signal; a frequency normalization signal boundary value is preset. , the value is less than The frequency normalized signal is used as a low-frequency signal, which will be greater than or equal to The frequency normalized signal is taken as the high-frequency signal.

[0022] Preferably, the method for obtaining the vibration signal deviation is:

[0023] Calculate the transmission line The first The difference value of the vibration energy representative signal between the vibration sequence of the local line and other local line vibration sequences is used as the transmission line in the first The first The vibration signal deviation of a local line vibration sequence;

[0024] The formula corresponding to the vibration signal deviation is:

[0025] ;

[0026] Where, Indicates that the transmission line The first The vibration signal deviation of a local line vibration sequence; Indicates that the transmission line The first The vibration energy in the local line vibration sequence represents the signal; Indicates that the transmission line During the high-efficiency icing period, Except for the local line vibration sequence, the vibration energy of all other local line vibration sequences represents the mean value of the signal; Indicates taking the absolute value.

[0027] Preferably, the method for acquiring the signal sequence to be frequency differentiated is:

[0028] A vibration signal deviation threshold is preset, and the local line vibration sequence with a vibration signal deviation greater than the vibration signal deviation threshold is filtered out and deleted as the transmission line vibration sequence in the first The signal sequence to be distinguished by frequency during an efficient icing period.

[0029] Preferably, the method for obtaining the line low-frequency effective occupancy is:

[0030] ;

[0031] Where, Indicates that the transmission line The line low-frequency effective occupancy rate during the high-efficiency icing period; Indicates that the transmission line The mean value of the frequency data in all the signal sequences to be frequency-differentiated during the effective icing period; Indicates that the transmission line The number of low-frequency signals in all the signal sequences to be frequency-differentiated during an efficient icing period; Indicates that the transmission line The number of high-frequency signals in all signal sequences to be frequency-differentiated during an efficient icing period.

[0032] Preferably, the method for obtaining the internal metal pressure bearing capacity is:

[0033] ;

[0034] Where, Indicates that the transmission line Internal metal pressure load-bearing capacity during an efficient icing period; Indicates that the transmission line The line low-frequency effective occupancy rate during the high-efficiency icing period; Indicates that the transmission line Ice hardness of the line skin during the efficient icing period; Represents the normalization function.

[0035] An ice dancing monitoring and early warning device for transmission lines, comprising:

[0036] A line monitoring signal acquisition module, a line internal pressure analysis module and an ice dance monitoring and early warning module; wherein the line monitoring signal acquisition module is used to obtain several line pressure signals and several line vibration signals of the transmission line in different periods, the line internal pressure analysis module implements the steps of the ice dance monitoring and early warning method for the transmission line by calling a computer program, and obtains the internal metal pressure load of the transmission line in different high-efficiency icing periods, and the ice dance monitoring and early warning module monitors and warns of ice dance on the transmission line in different high-efficiency icing periods.

[0037] The beneficial effects of the technical solution of the present invention are as follows: the present invention analyzes the ice compression force exerted on the surface of the transmission line in different periods according to the line pressure signal in the line external pressure sequence, obtains the ice hardness of the line skin, and then selects several high-efficiency icing periods; wherein the ice hardness of the line skin is used to describe the firmness of the ice layer covering the surface of the transmission line in the corresponding period; according to several line vibration signals in the line vibration sequence, the irregular vibration of the transmission line when dancing in different high-efficiency icing periods is analyzed, and after filtering out some frequency interference signals contained in the line vibration sequence, the content between high and low frequency signals of the transmission line in different high-efficiency icing periods is compared to obtain the line low-frequency effective occupancy; wherein the line low-frequency effective occupancy is used to describe the transmission line The extent to which the transmission line collision may occur due to the continuous dancing of the ice layer covering the line surface during the corresponding high-efficiency icing period; based on the hardness of the ice covering the line skin and the effective low-frequency occupancy of the line, the pressure-bearing capacity of the metal inside the line when the transmission line dances during different high-efficiency icing periods is comprehensively analyzed to obtain the internal metal pressure-bearing load; and then ice dancing monitoring and early warning are carried out; wherein the internal metal pressure-bearing load is used to describe the extent to which the fatigue wear of the metal conductive components of the transmission line is accelerated during the corresponding high-efficiency icing period; the present invention further analyzes the condensation process of the ice layer covering the line surface by analyzing the pressure and vibration conditions of the transmission line during different external weather environment periods, thereby eliminating electromagnetic interference to a large extent and improving the timeliness and accuracy of detection and early warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0039] Figure 1 The figure is a flowchart of the steps of the ice dancing monitoring and early warning method for transmission lines of the present invention. DETAILED DESCRIPTION

[0040] To further illustrate the technical means and effectiveness of the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effectiveness of the ice dance monitoring and early warning device and method for transmission lines proposed by the present invention. In the following description, different references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0041] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0042] The specific scheme of the ice dancing monitoring and early warning device and method for power transmission lines provided by the present invention is described in detail below with reference to the accompanying drawings.

[0043] See also Figure 1 , which shows a flowchart of a method for monitoring and early warning of ice dancing for transmission lines provided by an embodiment of the present invention, the method comprising the following steps:

[0044] Step S001: obtaining a line external pressure sequence and a line vibration sequence of a transmission line in different periods; the line external pressure sequence includes a plurality of line pressure signals, and the line vibration sequence includes a plurality of line vibration signals.

[0045] It should be noted that when the existing technology monitors transmission lines by installing sensors, it is easy for extreme weather factors to produce ice coverage stages of different thicknesses, causing the transmission lines to vibrate with different amplitudes and generate different electromagnetic interference, which interferes with the distinction of metal conductor loss conditions inside the transmission lines.

[0046] In a specific implementation of the embodiment of the present invention, the method for obtaining the line external pressure sequence and the line vibration sequence is as follows: obtaining all line pressure signals and all line vibration signals within the past week from the electronic monitoring platform of the transmission line; presetting a time interval , each As a period, and each The sequence of pressure signals inside the circuit is used as the circuit external pressure sequence. The sequence of line vibration signals within a period is regarded as the line vibration sequence. Each period corresponds to a line external pressure sequence and a line vibration sequence, and the number of elements contained in the line external pressure sequence and the line vibration sequence in the same period is the same.

[0047] It is particularly noted that, in this embodiment, This example is described as an example, and this embodiment is not specifically limited. In addition, the electronic monitoring platform in this embodiment uses a sampling frequency of 1 time / second as an example by default to record the line pressure signal and the line vibration signal, wherein the sampling frequency can be determined according to the specific implementation situation.

[0048] So far, the line external pressure sequence and line vibration sequence of the transmission line in different periods are obtained through the above method.

[0049] Step S002: Analyze the ice compression force on the transmission line surface at different periods based on the line pressure signal in the line external pressure sequence to obtain the ice hardness of the transmission line surface at different periods; and select several high-efficiency icing periods from different periods based on the ice hardness of the transmission line surface.

[0050] It should be noted that the weather environment faced by transmission lines exposed to the external environment is complex and diverse. Different weather environments will have different effects on the ability of ice and snow to adhere to the surface of the transmission line, which may be a promoting effect or an obstructing effect. Under normal circumstances, a weather environment with heavy snowfall and strong temperature drop will provide better conditions for the phenomenon of ice and snow adhering to the surface of the transmission line, while a weather environment with rapid warming will provide poor conditions for the phenomenon of ice and snow adhering to the surface of the transmission line. Therefore, the ice pressure on the line surface in each weather environment will also be quite different. Therefore, the line pressure signal in the line external pressure sequence can be used to analyze the ice compression force on the line surface in different periods to obtain the ice hardness of the line skin in different periods. According to the ice hardness of the line skin, several high-efficiency icing periods can be selected from different periods.

[0051] Specifically, as an example, the ice cover pressure direction index can be calculated using the following formula:

[0052] ;

[0053] Where, Indicates that the transmission line An indicator of the direction of ice cover pressure during a period; Indicates that the transmission line The number of all line pressure signals in the line external pressure sequence within a period; Indicates that the transmission line The first A line pressure signal; Indicates that the transmission line The first A line pressure signal; Represents a symbolic function.

[0054] It should be noted that if , indicating that the transmission line is During this period, the power transmission lines will be affected by external weather such as strong temperature drop and heavy snowfall, which will cause the power transmission lines to During this period, the ice and snow covering the line surface continues to accumulate; if , indicating that the transmission line is During this period, the external weather factors such as strong temperature drop and strong temperature rise were basically the same, resulting in the power transmission line The more drastic and unstable the external environment changes on the circuit surface during a period, the more , indicating that the transmission line is During this period, the power transmission lines will be affected by external weather such as temperature rise, which will cause During this period, the layer of ice and snow covering the surface of the line continued to melt.

[0055] Furthermore, as an example, the ice hardness of the line outer skin can be calculated by the following formula:

[0056] ;

[0057] Where, Indicates that the transmission line The hardness of ice covering on the line skin during a certain period; Indicates that the transmission line The cumulative sum of all line pressure signals in the line external pressure sequence within a period; Indicates that the transmission line An indicator of the direction of ice cover pressure during a period; represents the normalization function. For all periods Perform normalization processing, For all periods Perform normalization processing.

[0058] It should be noted that if the hardness of the ice covering the outer skin of the transmission line is greater, it means that the layer of ice and snow accumulated on the surface of the transmission line during the corresponding period is thicker, which reflects that the ice layer covering the surface of the transmission line during the corresponding period is stronger and has a higher hardness.

[0059] Furthermore, a hard threshold for ice coverage on the line is preset. , the line outer skin is covered with ice with a hardness greater than The period is taken as the efficient icing period; all efficient icing periods are obtained. This example is described as an example, and this embodiment is not specifically limited. It may depend on the specific implementation situation.

[0060] So far, several efficient icing periods have been obtained through the above method.

[0061] Step S003: Analyze the irregular vibration of the transmission line during dancing in different high-efficiency icing periods based on several line vibration signals in the line vibration sequence, filter out some frequency interference signals contained in the line vibration sequence, and obtain several low-frequency signals and several high-frequency signals of the transmission line during different high-efficiency icing periods; compare the content between the high-frequency and low-frequency signals of the transmission line during different high-efficiency icing periods to obtain the effective low-frequency occupancy of the transmission line during different high-efficiency icing periods; comprehensively analyze the pressure-bearing capacity of the internal metal of the transmission line during dancing in different high-efficiency icing periods based on the hardness of the ice coating on the line skin and the effective low-frequency occupancy of the line, and obtain the pressure-bearing load of the internal metal of the transmission line during different high-efficiency icing periods.

[0062] It should be noted that transmission line vibration signals are primarily divided into two categories: high-frequency and low-frequency. Low-frequency vibration primarily refers to ice coating on the transmission line surface, which causes the line's cross-section to become asymmetrical. Wind-induced lift, which can cause large, sustained, low-frequency vibrations in the transmission line, making it more susceptible to damage. High-frequency vibration primarily refers to vortex-induced resonance (VIR) caused by wind speed, which causes small-amplitude, high-frequency vibrations on the line surface, making it more susceptible to damage. Compared to the two, low-frequency vibration is the signal that requires primary analysis. Therefore, the irregular vibration of the transmission line during dancing in different high-efficiency icing periods can be analyzed, and some frequency interference signals contained in the line vibration sequence can be filtered to obtain several low-frequency signals and several high-frequency signals of the transmission line during different high-efficiency icing periods. By comparing the content of high-frequency and low-frequency signals of the transmission line during different high-efficiency icing periods, the effective low-frequency occupancy of the transmission line during different high-efficiency icing periods can be obtained. According to the hardness of the ice coating on the outer skin of the line and the effective low-frequency occupancy of the line, the pressure bearing capacity of the internal metal of the transmission line during dancing in different high-efficiency icing periods can be comprehensively analyzed to obtain the pressure bearing load of the internal metal of the transmission line during different high-efficiency icing periods.

[0063] Specifically, preset a signal number , in In the line vibration sequence during the high efficiency icing period, each The line vibration signals are divided into a local line vibration sequence; all local line vibration sequences are obtained; and each local line vibration sequence is subjected to a short-time Fourier transform to obtain a number of frequency signals of each local line vibration sequence. Each line vibration sequence contains multiple local line vibration sequences, each local line vibration sequence corresponds to multiple frequency signals, and each frequency signal corresponds to an energy value.

[0064] It is particularly noted that, in this embodiment, This example is described as an example, and this embodiment is not specifically limited. It can be determined according to the specific implementation situation; in addition, the process of obtaining the frequency signal is a well-known content of the short-time Fourier transform technology, and will not be repeated in this embodiment.

[0065] Further, the The frequency signal with the largest energy value in the local line vibration sequence is taken as the The vibration energy of a local line vibration sequence represents a signal. As an example, the vibration signal deviation can be calculated using the following formula:

[0066] ;

[0067] Where, Indicates that the transmission line The first The vibration signal deviation of a local line vibration sequence; Indicates that the transmission line The first The vibration energy in the local line vibration sequence represents the signal; Indicates that the transmission line During the high-efficiency icing period, Except for the local line vibration sequence, the vibration energy of all other local line vibration sequences represents the mean value of the signal; Indicates taking the absolute value.

[0068] It should be noted that the greater the deviation of the vibration signal, the more likely it is that there is an interference signal in the corresponding local line vibration sequence, which makes the boundary between high-frequency and low-frequency information of the transmission line more blurred when the transmission line dances under ice, and the vibration signal deviates more from the actual vibration content, reflecting that the corresponding local line vibration sequence needs to be filtered and cleared.

[0069] Furthermore, a vibration signal deviation threshold is preset , the vibration signal deviation is greater than The local line vibration sequence after filtering and deletion is used as the transmission line in the first The frequency-differentiated signal sequence in the efficient icing period is This example is described as an example, and this embodiment is not specifically limited. It may depend on the specific implementation situation.

[0070] Furthermore, the transmission line During an efficient icing period, each frequency signal in all the signal sequences to be frequency-differentiated is normalized, and the normalized frequency signal is used as the frequency normalization signal; a frequency normalization signal boundary value is preset. , the value is less than The frequency normalized signal is used as a low-frequency signal, which will be greater than or equal to The frequency normalized signal is used as the high frequency signal. This example is described as an example, and this embodiment is not specifically limited. It may depend on the specific implementation situation.

[0071] It is particularly noted that this embodiment defaults to The normalization process is performed by taking the function as an example, wherein the normalization function can be determined according to the specific implementation situation, and will not be described in detail in this embodiment.

[0072] Furthermore, as an example, the line low-frequency effective occupancy can be calculated by the following formula:

[0073] ;

[0074] Where, Indicates that the transmission line The line low-frequency effective occupancy rate during the high-efficiency icing period; Indicates that the transmission line The mean value of the frequency data in all the signal sequences to be frequency-differentiated during the effective icing period; Indicates that the transmission line The number of low-frequency signals in all the signal sequences to be frequency-differentiated during an efficient icing period; Indicates that the transmission line The number of high-frequency signals in all signal sequences to be frequency-differentiated during an efficient icing period.

[0075] It should be noted that if the effective low-frequency occupancy of the line is greater, it means that the transmission line is more likely to have the ice layer covering the line surface and continuously dancing during the corresponding high-efficiency icing period, resulting in the collision of the transmission lines. This reflects that the reference significance of the low-frequency signal of the transmission line during the corresponding high-efficiency icing period is more effective.

[0076] Furthermore, as an example, the internal metal pressure bearing capacity can be calculated by the following formula:

[0077] ;

[0078] Where, Indicates that the transmission line Internal metal pressure load-bearing capacity during an efficient icing period; Indicates that the transmission line The line low-frequency effective occupancy rate during the high-efficiency icing period; Indicates that the transmission line Ice hardness of the line skin during the efficient icing period; represents the normalized function, which is used to calculate the transmission line's efficiency in all efficient icing periods. Perform normalization processing.

[0079] It should be noted that if the internal metal pressure load capacity is greater, it means that the metal conductive components inside the transmission line will be under greater pressure during the corresponding high-efficiency icing period, which means that the transmission line is more likely to accelerate the fatigue wear of the metal conductive components during the corresponding high-efficiency icing period, thereby causing safety accidents.

[0080] Thus, the internal metal pressure load-bearing capacity of the transmission line in different high-efficiency icing periods is obtained through the above method.

[0081] Step S004: Based on the internal metal pressure bearing capacity, ice dancing monitoring and early warning are performed on the transmission lines in different high-efficiency icing periods.

[0082] In a specific implementation of the embodiment of the present invention, four signal warning level intervals are preset in order: 、 、 、 Taking any high-efficiency icing period as an example, if the internal metal pressure load of the transmission line in the high-efficiency icing period belongs to , then the warning device does not perform warning operation; if the internal metal pressure load of the transmission line during the high efficiency icing period belongs to , then the warning device will issue a warning mark on the electronic monitoring platform; if the internal metal pressure load of the transmission line during the high-efficiency icing period belongs to , then the warning device will mark the warning on the electronic monitoring platform and give a sound prompt; if the internal metal pressure load of the transmission line during the high-efficiency icing period belongs to , then the early warning device will forcibly shut down the operation of the transmission line after making an early warning mark and sound prompt on the electronic monitoring platform.

[0083] It is particularly noted that, in this embodiment, This example is described as an example, and this embodiment is not specifically limited. It may depend on the specific implementation situation.

[0084] At this point, this embodiment is completed.

[0085] Another embodiment of the present invention provides an ice dancing monitoring and early warning device for transmission lines, which includes a line monitoring signal acquisition module, a line internal pressure analysis module and an ice dancing monitoring and early warning module; when the device calls a computer program, it executes steps S001 to S004 of the above method.

[0086] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for monitoring and early warning of ice dancing on transmission lines, characterized in that: The method comprises the following steps: Acquire a line external pressure sequence and a line vibration sequence of a transmission line in different periods; the line external pressure sequence includes a plurality of line pressure signals, and the line vibration sequence includes a plurality of line vibration signals; Based on the line pressure signal in the line external pressure sequence, the ice compression force on the transmission line surface at different periods is analyzed to obtain the ice hardness of the transmission line surface at different periods; based on the ice hardness of the transmission line surface, several high-efficiency icing periods are selected from different periods; Based on several line vibration signals in the line vibration sequence, the irregular vibration of the transmission line during the galloping in different high-efficiency icing periods is analyzed, and some frequency interference signals contained in the line vibration sequence are filtered to obtain several low-frequency signals and several high-frequency signals of the transmission line during different high-efficiency icing periods; the content between the high-frequency and low-frequency signals of the transmission line during different high-efficiency icing periods is compared to obtain the line low-frequency effective occupancy rate of the transmission line during different high-efficiency icing periods; based on the hardness of the ice coating on the line skin and the line low-frequency effective occupancy rate, the pressure bearing capacity of the internal metal of the transmission line during the galloping in different high-efficiency icing periods is comprehensively analyzed to obtain the internal metal pressure bearing capacity of the transmission line during different high-efficiency icing periods; Based on the internal metal pressure-bearing load capacity, ice dancing monitoring and early warning are carried out on transmission lines during different high-efficiency icing periods.

2. The ice dancing monitoring and early warning method for transmission lines according to claim 1 is characterized in that: The method for obtaining the ice hardness of the line outer skin is: For the line external pressure sequence in any period, the pressure fluctuation directions between adjacent elements in the line external pressure sequence are compared to obtain the ice cover pressure direction index of the line external pressure sequence in the period. If the transmission line is The ice cover pressure direction index in the period is less than 0, then the transmission line The calculation formula for the ice hardness of the line skin in a period is: ; If the transmission line is The ice cover pressure direction index in the period is equal to 0, then the transmission line The calculation formula for the ice hardness of the line skin in a period is: ; If the transmission line is The ice cover pressure direction index in the period is greater than 0, then the transmission line The calculation formula for the ice hardness of the line skin in a period is: ; in, Indicates that the transmission line The hardness of ice covering on the line skin during a certain period; Indicates that the transmission line The cumulative sum of all line pressure signals in the line external pressure sequence within a period; Indicates that the transmission line An indicator of the direction of ice cover pressure during a period; Represents the normalization function.

3. The ice dancing monitoring and early warning method for transmission lines according to claim 2 is characterized in that: The method for obtaining the ice layer pressure direction indicator is as follows: ； Where, Indicates that the transmission line An indicator of the direction of ice cover pressure during a period; Indicates that the transmission line The number of all line pressure signals in the line external pressure sequence within a period; Indicates that the transmission line The first one in the line external pressure sequence in the period A line pressure signal; Indicates that the transmission line The first one in the line external pressure sequence in the period A line pressure signal; Represents a symbolic function.

4. The ice dancing monitoring and early warning method for transmission lines according to claim 1 is characterized in that: The method for obtaining the efficient icing period is: A line skin icing hardness threshold is preset, and a period when the line skin icing hardness is greater than the line skin icing hardness threshold is used as an efficient icing period.

5. The ice dancing monitoring and early warning method for transmission lines according to claim 1 is characterized in that: The method for obtaining the low-frequency signal and the high-frequency signal is: In the In the line vibration sequence within the high-efficiency icing period, each preset number of line vibration signals is divided into a local line vibration sequence; The frequency signal with the largest energy value in the local line vibration sequence is taken as the The vibration energy representative signal of the local line vibration sequence is obtained according to the vibration energy representative signal. The vibration signal deviation of each local line vibration sequence in the high-efficiency icing period is calculated; according to the vibration signal deviation, the local line vibration sequence is filtered and processed to obtain the transmission line in the first The signal sequence to be distinguished by frequency in the high-efficiency icing period; the transmission line in the During an efficient icing period, each frequency signal in all the signal sequences to be frequency differentiated is normalized, and the normalized frequency signal is used as the frequency normalization signal; Preset a frequency normalized signal cutoff value , the value is less than The frequency normalized signal is used as a low-frequency signal, which will be greater than or equal to The frequency normalized signal is taken as the high-frequency signal.

6. The ice dancing monitoring and early warning method for transmission lines according to claim 5 is characterized in that: The method for obtaining the vibration signal deviation is: Calculate the transmission line The first The difference value of the vibration energy representative signal between the vibration sequence of the local line and other local line vibration sequences is used as the transmission line in the first The first The vibration signal deviation of a local line vibration sequence; The formula corresponding to the vibration signal deviation is: ； Where, Indicates that the transmission line The first The vibration signal deviation of a local line vibration sequence; Indicates that the transmission line The first The vibration energy in the local line vibration sequence represents the signal; Indicates that the transmission line During the high-efficiency icing period, Except for the local line vibration sequence, the vibration energy of all other local line vibration sequences represents the mean value of the signal; Indicates taking the absolute value.

7. The ice dancing monitoring and early warning method for transmission lines according to claim 5 is characterized in that: The method for obtaining the signal sequence to be frequency differentiated is: A vibration signal deviation threshold is preset, and the local line vibration sequence with a vibration signal deviation greater than the vibration signal deviation threshold is filtered out and deleted as the transmission line vibration sequence in the first The signal sequence to be distinguished by frequency during an efficient icing period.

8. The ice dancing monitoring and early warning method for transmission lines according to claim 5 is characterized in that: The method for obtaining the line low-frequency effective occupancy is: ； Where, Indicates that the transmission line The line low-frequency effective occupancy rate during the high-efficiency icing period; Indicates that the transmission line The mean of the frequency data in all the signal sequences to be frequency-differentiated during the effective icing period; Indicates that the transmission line The number of low-frequency signals in all the signal sequences to be frequency-differentiated during an efficient icing period; Indicates that the transmission line The number of high-frequency signals in all signal sequences to be frequency-differentiated during an efficient icing period.

9. The ice dancing monitoring and early warning method for transmission lines according to claim 1 is characterized in that: The method for obtaining the internal metal pressure bearing capacity is: ； Where, Indicates that the transmission line Internal metal pressure load-bearing capacity during an efficient icing period; Indicates that the transmission line The line low-frequency effective occupancy rate during the high-efficiency icing period; Indicates that the transmission line Ice hardness of the line skin during the efficient icing period; Represents the normalization function.

10. The ice dancing monitoring and early warning device for transmission lines is characterized by: The device comprises: A line monitoring signal acquisition module, a line internal pressure analysis module and an ice dance monitoring and early warning module; wherein the line monitoring signal acquisition module is used to obtain several line pressure signals and several line vibration signals of the transmission line in different periods, the line internal pressure analysis module implements the steps of the ice dance monitoring and early warning method for transmission lines as described in any one of claims 1-9 by calling a computer program, and obtains the internal metal pressure load of the transmission line in different high-efficiency icing periods, and the ice dance monitoring and early warning module monitors and warns of ice dance on the transmission line in different high-efficiency icing periods.

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