A method, system, terminal and medium for early warning analysis of wind sway of overhead cables

Abstract

The present invention discloses an overhead cable wind sway warning analysis method, system, terminal and medium, which relates to the field of cable safety warning. The key points of the technical solution are: determining the cable sag at each distribution position on the overhead cable according to the laying parameters of the overhead cable, and determining the wind sway relative coefficient of each distribution position in the associated warning interval according to the cable sag; determining the associated threshold of the corresponding distribution position in the associated warning interval by the product of the parameter threshold and the wind sway relative coefficient. When the characteristic parameter of a distribution position on the overhead cable exceeds the parameter threshold, the present invention assists in judging the wind sway warning of the warning position according to the wind sway conditions of each distribution position on both sides of the warning position, which can effectively reduce the wind sway warning error caused by the pulsating wind field as the main factor; in addition, when the pulsating wind field performance of each distribution position on both sides of the warning position is prominent, it can achieve timely warning of the warning position when the reference threshold value is small.

Description

Technical Field

[0001] The present invention relates to the field of cable safety warning, and more specifically, to an overhead cable wind sway warning analysis method, system, terminal and medium. Background Art

[0002] Cable wind sway refers to the swaying of cables under the action of wind. This phenomenon is particularly common in long strip structures such as power lines, communication lines, and bridge cables. Wind is the main cause of cable sway. Especially when the wind is strong, the swing amplitude and frequency of the cables will increase, so cable sway may cause collisions between cables, affecting the stability of power transmission or communication signals; in severe cases, the swing may also cause cable breakage or damage. Therefore, it is very necessary to monitor and analyze the cable wind sway.

[0003] At present, cable wind sway monitoring mainly uses inclination sensors, acceleration sensors or OPGW optical cables (optical fiber composite overhead ground wires) to collect signals of cable vibration. After data processing of the collected signals, information such as wind sway position, wind sway amplitude and wind sway frequency can be obtained. Since a certain wind sway space is considered in the design of cable layout, a lower wind sway amplitude or wind sway frequency has less impact on the safety of the cable, and the reliability and accuracy of direct warning when the cable sways are poor. For this reason, in the prior art, by designing a reference threshold, the monitored wind sway amplitude or wind sway frequency is compared with the corresponding reference threshold, and an early warning signal is output when the reference threshold is exceeded. However, since cable wind sway is a continuous process of energy accumulation, and the wind field mainly includes background wind field and pulsating wind field, the background wind field mainly shows trend changes, and the pulsating wind field has strong randomness, so the error of wind sway warning caused by the pulsating wind field as the main factor is high, resulting in low accuracy and reliability of overhead cable wind sway warning.

[0004] Therefore, how to research and design an overhead cable wind sway warning analysis method, system, terminal and medium that can overcome the above-mentioned defects is a problem that we urgently need to solve. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide an overhead cable wind sway warning analysis method, system, terminal and medium. When the characteristic parameter of a distribution position on the overhead cable exceeds the parameter threshold, the wind sway warning at the warning position is assisted in judging the wind sway warning according to the wind sway conditions of each distribution position on both sides of the warning position, which can effectively reduce the wind sway warning error caused by the pulsating wind field as the main factor.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] In a first aspect, a method for analyzing wind sway warning of overhead cables is provided, comprising the following steps:

[0008] The optical signal of the overhead cable is collected through the OPGW optical cable, and the optical time domain reflectometer is used to process the optical signal to extract the characteristic parameter set that characterizes the cable swing state;

[0009] Selecting characteristic parameters exceeding the parameter threshold from the characteristic parameter set, and using the distribution position of the selected characteristic parameters on the overhead cable as the warning position;

[0010] Determine the corresponding associated warning interval according to the preset associated span and the warning position, and extract the characteristic parameters located in the associated warning interval from the characteristic parameter set to obtain a characteristic parameter sequence;

[0011] Determine the cable sag at each distribution position on the overhead cable according to the laying parameters of the overhead cable, and determine the wind swing relative coefficient at each distribution position in the associated warning interval according to the cable sag;

[0012] The correlation threshold of the corresponding distribution position in the correlation warning interval is determined by the product of the parameter threshold and the wind swing relative coefficient;

[0013] The characteristic parameters in the characteristic parameter sequence are compared with the corresponding associated thresholds, and the probability of the characteristic parameters exceeding the corresponding associated thresholds within the associated warning interval is calculated;

[0014] When the probability of exceeding the limit exceeds the preset probability, an early warning signal for wind sway warning at the early warning position is output.

[0015] Furthermore, the characteristic parameter is wind swing amplitude or wind swing frequency.

[0016] Furthermore, the calculation formula of the associated warning interval is specifically:

[0017] ;

[0018] in, Indicates the associated warning interval; Indicates the warning location; Indicates the preset association span.

[0019] Furthermore, the calculation formula of the associated warning interval is specifically:

[0020] ;

[0021] in, Indicates the associated warning interval; Indicates the warning location; Indicates the preset association span; Indicates a relatively large span; Indicates a smaller span; Indicates the distribution position corresponding to the lowest point in the overhead cable; Indicates the offset factor.

[0022] Furthermore, the relative wind swing coefficient corresponding to the distribution position where the cable sag is large is larger than the relative wind swing coefficient corresponding to the distribution position where the cable sag is small.

[0023] Furthermore, the ratio of the wind swing relative coefficients corresponding to the two distribution positions is equal to the ratio of the cable sags corresponding to the two distribution positions.

[0024] Furthermore, the process of determining the wind swing relative coefficient is specifically as follows:

[0025] Determine the cable sag a at distribution position 1 and the cable sag b at distribution position 2, where a>b;

[0026] After the cable at distribution position 1 is lifted vertically upward by the cable sag a, the cable sag c at distribution position 2 is determined;

[0027] The sag change value d at distribution position 2 is calculated by the difference between the cable sag b and the cable sag c;

[0028] The relative coefficient of wind swing at distribution position 2 is obtained by multiplying the ratio of the sag change value d to the cable sag a by the relative coefficient of wind swing at distribution position 1.

[0029] In a second aspect, an overhead cable wind sway warning analysis system is provided, comprising:

[0030] A signal processing module is used to collect optical signals of overhead cables through OPGW optical cables, and process the optical signals using an optical time domain reflectometer to extract a characteristic parameter set that characterizes the swing state of the cable;

[0031] A feature extraction module, used to select feature parameters exceeding a parameter threshold from a feature parameter set, and use the distribution position of the selected feature parameters on the overhead cable as a warning position;

[0032] An interval determination module is used to determine the corresponding associated warning interval according to the preset associated span and the warning position, and extract the characteristic parameters located in the associated warning interval from the characteristic parameter set to obtain a characteristic parameter sequence;

[0033] A coefficient determination module, used to determine the cable sag at each distribution position on the overhead cable according to the laying parameters of the overhead cable, and determine the wind swing relative coefficient of each distribution position in the associated warning interval according to the cable sag;

[0034] A threshold calculation module, used to determine the associated threshold of the corresponding distribution position in the associated warning interval by the product of the parameter threshold and the wind swing relative coefficient;

[0035] The probability analysis module is used to compare the characteristic parameters in the characteristic parameter sequence with the corresponding associated thresholds, and to calculate the probability of the characteristic parameters exceeding the corresponding associated thresholds within the associated warning interval;

[0036] The wind sway warning module is used to output a warning signal for wind sway warning at the warning position when the over-limit probability exceeds the preset probability.

[0037] In a third aspect, a computer terminal is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, an overhead cable wind sway warning analysis method as described in any one of the first aspects is implemented.

[0038] In a fourth aspect, a computer-readable medium is provided, on which a computer program is stored, and the computer program is executed by a processor to implement an overhead cable wind sway warning analysis method as described in any one of the first aspects.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention provides an overhead cable wind sway warning analysis method. When a characteristic parameter of a distribution position on the overhead cable exceeds a parameter threshold, the wind sway warning of the warning position is assisted in judging according to the wind sway conditions of each distribution position on both sides of the warning position, which can effectively reduce the wind sway warning error caused by the pulsating wind field as the main factor; in addition, when the pulsating wind field of each distribution position on both sides of the warning position is prominent, the warning position can be timely warned when the reference threshold value is small;

[0041] 2. When determining the associated warning interval, the present invention takes into account that cables with large cable sags respond more quickly to wind fields, and shifts the midpoint of the associated warning interval from the warning position to the distribution position corresponding to the lowest point in the overhead cable, so that the selected data for auxiliary judgment is more timely, thereby making the wind swing warning at the warning position more accurate and reliable;

[0042] 3. When determining the relative wind swing coefficients of each distribution position on both sides of the warning position, the present invention fully considers the constraints of the cable positions, and multiplies the ratio of the vertical change value d to the cable verticality a by the relative wind swing coefficient corresponding to distribution position 1, so that the relative wind swing coefficient of distribution position 2 is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0044] Figure 1is a flow chart of Embodiment 1 of the present invention;

[0045] Figure 2 It is a schematic diagram of analyzing the relative coefficient of wind pendulum in Example 1 of the present invention;

[0046] Figure 3 It is a system block diagram in Example 2 of the present invention. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0048] Embodiment 1: A method for analyzing wind sway warning of overhead cables, such as Figure 1 As shown, the following steps are included:

[0049] S1: The optical signal of the overhead cable is collected through the OPGW optical cable, and the optical signal is processed by the optical time domain reflectometer to extract the characteristic parameter set representing the cable swing state;

[0050] S2: Selecting characteristic parameters exceeding the parameter threshold from the characteristic parameter set, and using the distribution position of the selected characteristic parameters on the overhead cable as the warning position;

[0051] S3: determining the corresponding associated warning interval according to the preset associated span and the warning position, and extracting the characteristic parameters in the associated warning interval from the characteristic parameter set to obtain a characteristic parameter sequence;

[0052] S4: determining the cable sag at each distribution position on the overhead cable according to the layout parameters of the overhead cable, and determining the wind swing relative coefficient of each distribution position in the associated warning interval according to the cable sag;

[0053] S5: Determine the correlation threshold of the corresponding distribution position in the correlation warning interval by the product of the parameter threshold and the wind swing relative coefficient;

[0054] S6: comparing the characteristic parameters in the characteristic parameter sequence with the corresponding associated thresholds, and calculating the probability of the characteristic parameters exceeding the corresponding associated thresholds within the associated warning interval;

[0055] S7: When the probability of exceeding the limit exceeds the preset probability, an early warning signal for a wind sway warning is outputted to the early warning position.

[0056] In step S1 , the characteristic parameter is the wind swing amplitude or the wind swing frequency, or may be a parameter combining the wind swing amplitude and the wind swing frequency, which is not limited here.

[0057] It should be noted that the characteristic parameters collected in step S1 only indicate the existence of wind sway at each distribution position, and do not indicate the existence of wind sway risks at all distribution positions.

[0058] In step S2, the value of the parameter threshold determines the purpose of the wind swing warning. For example, if the value of the parameter threshold is large, it is mainly to assist in the judgment of reducing the wind swing warning error caused by the pulsating wind field as the main factor. For another example, if the value of the parameter threshold is small, it is mainly when the pulsating wind field at each distribution position on both sides of the warning position is prominent, it can achieve timely warning of the warning position when the reference threshold value is small.

[0059] Therefore, in actual application, the size of the reference threshold can be flexibly adjusted to achieve the switching or integration of various wind swing warning purposes.

[0060] In step S3, considering the amount of data processing, only part of the distributed position data on both sides of the warning position may be processed; in addition, part of the distributed positions on both sides of the warning position may be sampled by interval sampling.

[0061] As an optional implementation, the calculation formula of the associated warning interval is specifically:

[0062] ;

[0063] in, Indicates the associated warning interval; Indicates the warning location; Indicates the preset association span.

[0064] It should be noted that the preset associated span refers to the length along the distribution direction of the overhead cables.

[0065] As an optional implementation, considering that cables with large cable sags respond more quickly to wind farms, the midpoint of the associated warning interval is offset from the warning position to the distribution position corresponding to the lowest point in the overhead cable. For example, the calculation formula for the associated warning interval is specifically:

[0066] ;

[0067] in, Indicates the associated warning interval; Indicates the warning location; Indicates the preset association span; Indicates a relatively large span; Indicates a smaller span; Indicates the distribution position corresponding to the lowest point in the overhead cable; Indicates the offset factor.

[0068] In the present invention, the relative wind swing coefficient corresponding to the distribution position where the cable sag is large is larger than the relative wind swing coefficient corresponding to the distribution position where the cable sag is small.

[0069] As an optional implementation, the ratio of wind swing relative coefficients corresponding to the two distribution positions is equal to the ratio of cable sags corresponding to the two distribution positions.

[0070] As another optional implementation, taking full account of the constraints of the cable positions, the process of determining the relative wind sway coefficient is as follows: Figure 3 As shown, the cable sag a at distribution position 1 and the cable sag b at distribution position 2 are determined, a>b; after the cable at distribution position 1 is lifted vertically upward by the cable sag a, the cable sag c at distribution position 2 is determined; the sag change value d at distribution position 2 is calculated by the difference between the cable sag b and the cable sag c; the wind swing relative coefficient at distribution position 2 is obtained by multiplying the ratio of the sag change value d to the cable sag a by the wind swing relative coefficient corresponding to distribution position 1.

[0071] Embodiment 2: An overhead cable wind sway early warning analysis system, the system is used to implement an overhead cable wind sway early warning analysis method recorded in embodiment 1, such as Figure 3 As shown, it includes a signal processing module, a feature extraction module, an interval determination module, a coefficient determination module, a threshold calculation module, a probability analysis module and a wind swing warning module.

[0072] Among them, the signal processing module is used to collect the optical signal of the overhead cable through the OPGW optical cable, and use the optical time domain reflectometer to process the optical signal and extract the characteristic parameter set that characterizes the cable swing state; the feature extraction module is used to select the characteristic parameters that exceed the parameter threshold from the characteristic parameter set, and use the distribution position of the selected characteristic parameters on the overhead cable as the warning position; the interval determination module is used to determine the corresponding associated warning interval according to the preset associated span and the warning position, and extract the characteristic parameters located in the associated warning interval from the characteristic parameter set to obtain the characteristic parameter sequence; the coefficient determination module is used to determine the cable sag at each distribution position on the overhead cable according to the laying parameters of the overhead cable, and determine the wind swing relative coefficient of each distribution position in the associated warning interval according to the cable sag; the threshold calculation module is used to determine the associated threshold of the corresponding distribution position in the associated warning interval by the product of the parameter threshold and the wind swing relative coefficient; the probability analysis module is used to compare the characteristic parameters in the characteristic parameter sequence with the corresponding associated threshold, and to count the over-limit probability of the characteristic parameters in the associated warning interval exceeding the corresponding associated threshold; the wind swing warning module is used to output a warning signal for wind swing warning to the warning position when the over-limit probability exceeds the preset probability.

[0073] The present invention also records a computer terminal, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, an overhead cable wind sway warning analysis method as described in Example 1 is implemented.

[0074] The present invention also records a computer-readable medium on which a computer program is stored. The computer program is executed by a processor to implement an overhead cable wind sway warning analysis method as described in Example 1.

[0075] Working principle: When the characteristic parameter of a distribution position on the overhead cable exceeds the parameter threshold, the wind swing warning at the warning position is assisted in judging according to the wind swing conditions at the distribution positions on both sides of the warning position, which can effectively reduce the wind swing warning error caused by the pulsating wind field as the main factor; in addition, when the pulsating wind field at the distribution positions on both sides of the warning position is prominent, the warning position can be timely warned when the reference threshold value is small.

[0076] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0077] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0078] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0079] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0080] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for early warning analysis of wind sway of overhead cables, characterized in that: The following steps are involved: The optical signal of the overhead cable is collected through the OPGW optical cable, and the optical time domain reflectometer is used to process the optical signal to extract the characteristic parameter set that characterizes the cable swing state; Selecting characteristic parameters exceeding the parameter threshold from the characteristic parameter set, and using the distribution position of the selected characteristic parameters on the overhead cable as the warning position; Determine the corresponding associated warning interval according to the preset associated span and the warning position, and extract the characteristic parameters located in the associated warning interval from the characteristic parameter set to obtain a characteristic parameter sequence; Determine the cable sag at each distribution position on the overhead cable according to the laying parameters of the overhead cable, and determine the wind swing relative coefficient at each distribution position in the associated warning interval according to the cable sag; The correlation threshold of the corresponding distribution position in the correlation warning interval is determined by the product of the parameter threshold and the wind swing relative coefficient; The characteristic parameters in the characteristic parameter sequence are compared with the corresponding associated thresholds, and the probability of the characteristic parameters exceeding the corresponding associated thresholds within the associated warning interval is calculated; When the probability of exceeding the limit exceeds the preset probability, an early warning signal for wind swing warning at the warning position is output; The relative wind swing coefficient corresponding to the distribution position where the cable sag is large is larger than the relative wind swing coefficient corresponding to the distribution position where the cable sag is small; The ratio of the wind swing relative coefficients corresponding to the two distribution positions is equal to the ratio of the cable sags corresponding to the two distribution positions; The specific process of determining the relative coefficient of wind swing is as follows: Determine the cable sag a at distribution position 1 and the cable sag b at distribution position 2, where a>b; After the cable at distribution position 1 is lifted vertically upward by the cable sag a, the cable sag c at distribution position 2 is determined; The sag change value d at distribution position 2 is calculated by the difference between the cable sag b and the cable sag c; The relative coefficient of wind swing at distribution position 2 is obtained by multiplying the ratio of the sag change value d to the cable sag a by the relative coefficient of wind swing at distribution position 1.

2. The method for early warning and analysis of wind sway of overhead cables according to claim 1 is characterized in that: The characteristic parameter is wind swing amplitude or wind swing frequency.

3. The method for early warning and analysis of wind sway of overhead cables according to claim 1 is characterized in that: The calculation formula of the associated warning interval is specifically: Q = [L0-D, L0+D]; Among them, Q represents the associated warning interval; L0 represents the warning position; and D represents the preset associated span.

4. The method for early warning and analysis of wind sway of overhead cables according to claim 1 is characterized in that: The calculation formula of the associated warning interval is specifically: Among them, Q represents the associated warning interval; L0 represents the warning position; D represents the preset associated span; D1 represents a larger span; D2 represents a smaller span; L m It indicates the distribution position corresponding to the lowest point in the overhead cable; k indicates the offset coefficient.

5. An overhead cable wind sway warning analysis system, characterized in that: The system is used to implement an overhead cable wind sway early warning analysis method as described in any one of claims 1 to 4, comprising: A signal processing module is used to collect optical signals of overhead cables through OPGW optical cables, and process the optical signals using an optical time domain reflectometer to extract a characteristic parameter set that characterizes the swing state of the cable; A feature extraction module, used to select feature parameters exceeding a parameter threshold from a feature parameter set, and use the distribution position of the selected feature parameters on the overhead cable as a warning position; An interval determination module is used to determine the corresponding associated warning interval according to the preset associated span and the warning position, and extract the characteristic parameters located in the associated warning interval from the characteristic parameter set to obtain a characteristic parameter sequence; A coefficient determination module, used to determine the cable sag at each distribution position on the overhead cable according to the laying parameters of the overhead cable, and determine the wind swing relative coefficient of each distribution position in the associated warning interval according to the cable sag; A threshold calculation module, used to determine the associated threshold of the corresponding distribution position in the associated warning interval by the product of the parameter threshold and the wind swing relative coefficient; The probability analysis module is used to compare the characteristic parameters in the characteristic parameter sequence with the corresponding associated thresholds, and to calculate the probability of the characteristic parameters exceeding the corresponding associated thresholds within the associated warning interval; The wind sway warning module is used to output a warning signal for wind sway warning at the warning position when the probability of exceeding the limit exceeds the preset probability.

6. A computer terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, an overhead cable wind sway warning analysis method as described in any one of claims 1-4 is implemented.

7. A computer readable medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement an overhead cable wind sway warning analysis method as described in any one of claims 1 to 4.

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