An analysis method, system and device for maximum wind speed allowed by windage yaw of a power transmission line tower suspension string and a storage medium

Abstract

The application discloses a kind of transmission line tower suspension string wind deviation allowed maximum wind speed analysis method, system, device and storage medium, belong to overhead transmission line evaluation technical field.Method includes obtaining the original parameter data of transmission line tower;Based on original parameter data, the original wind deviation angle of each phase suspension string in transmission line tower is calculated;Maximum wind deviation angle and original wind deviation angle of each phase suspension string are compared, whether the wind speed is adjusted according to the comparison result, if adjusted wind speed, the adjustment wind deviation angle of each phase suspension string is calculated based on adjusted wind speed, until the difference between maximum wind deviation angle and adjustment wind deviation angle of each phase suspension string is not more than preset threshold;After adjusted wind speed is reduced by preset gradient value, it is used as the maximum wind speed allowed for corresponding phase suspension string wind deviation;The minimum value in the maximum wind speed allowed for each phase suspension string wind deviation is used as transmission line tower suspension string wind deviation allowed maximum wind speed.The application is convenient for evaluating tower suspension string wind deviation allowed maximum wind speed.

Description

Technical Field

[0001] This invention belongs to the field of overhead transmission line evaluation technology, specifically relating to an analysis method, system, device, and storage medium for the maximum allowable wind speed of suspension deflection of transmission line towers. Background Technology

[0002] In recent years, numerous wind-related accidents have occurred on overhead transmission lines in China. Wind-induced flashovers and tower damage caused by severe winds have significantly impacted the safe operation of the power grid. Operating units have therefore placed great emphasis on assessing the wind resistance of overhead transmission lines. During the tower planning and design phase, each tower type has a corresponding design wind speed for resisting suspension string wind deflection. However, after the actual tower placement, factors such as span, height difference, and conductor tension often differ from the planned design. Even for the same tower type, the suspension string wind deflection resistance varies under different operating conditions, making it difficult to assess the maximum allowable wind speed for suspension string wind deflection on each tower in operating lines. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an analysis method, system, device and storage medium for the maximum allowable wind speed of suspension deflection of transmission line towers, so as to facilitate the evaluation of the maximum allowable wind speed of suspension deflection of each tower in operation.

[0004] This invention provides the following technical solution:

[0005] Firstly, a method for analyzing the maximum allowable wind speed for suspension deflection of transmission line towers is provided, including: obtaining the original parameter data of the transmission line towers;

[0006] Based on the original parameter data, the original wind deflection angle of each phase suspension string in the transmission line tower is calculated;

[0007] The maximum wind deflection angle of each phase suspension string is compared with the original wind deflection angle of each phase suspension string. Based on the comparison result, it is determined whether to adjust the wind speed. If the wind speed is adjusted, the adjusted wind deflection angle of each phase suspension string is calculated based on the adjusted wind speed until the difference between the maximum wind deflection angle of each phase suspension string and the adjusted wind deflection angle is not greater than a preset threshold.

[0008] The adjusted wind speed minus the preset gradient value is taken as the maximum allowable wind speed for the corresponding phase suspension wind deflection.

[0009] The minimum value among the maximum allowable wind speeds for suspension deflection of each phase is taken as the maximum allowable wind speed for suspension deflection of the transmission line tower.

[0010] As an optional technical solution of the present invention, the original parameter data of the transmission line tower includes horizontal span, original wind speed, vertical span under original wind speed, vertical load of suspension string, wind load of suspension string under original wind speed, vertical load per unit length of conductor, load per unit length of conductor under original wind speed, original tension of conductor, cross-sectional area of ​​conductor, elastic coefficient of conductor and representative span.

[0011] The original wind speed refers to the factory-designed wind speed of the transmission line tower.

[0012] As an optional technical solution of the present invention, the original wind deflection angle of each phase suspension string is expressed as:

[0013] ;

[0014] in, Indicates the original wind deflection angle. This indicates the vertical load on the suspended string. G represents the suspended crosswind load at the original wind speed, and G represents the vertical load per unit length of conductor. This represents the load per unit length of conductor at the original wind speed. Indicates the horizontal spacing. This indicates the vertical span at the original wind speed.

[0015] As an optional technical solution of the present invention, the step of comparing the maximum wind deflection angle of each phase suspension string with the original wind deflection angle, and determining whether to adjust the wind speed based on the comparison result, includes:

[0016] If the difference between the maximum wind deflection angle and the original wind deflection angle of any phase suspension string is greater than a preset threshold, it is determined that the wind speed of the current phase suspension string needs to be adjusted.

[0017] As an optional technical solution of the present invention, the adjustment wind deflection angle of each phase suspension string is expressed as:

[0018] ;

[0019] ;

[0020] ;

[0021] ;

[0022] ;

[0023] in, This indicates adjusting the wind deflection angle. This represents the suspended wind load at the original wind speed. This indicates the suspended crosswind load under adjusted wind speed, where G represents the vertical load per unit length of conductor. This represents the load per unit length of conductor under adjusted wind speed. G represents the load per unit length of conductor at the original wind speed. I This indicates the vertical load on the suspended string. Indicates the horizontal spacing. This indicates the vertical strut distance under adjusted wind speed. Indicates the original wind speed. This indicates an adjustment to the wind speed. This represents the wind load adjustment factor. This indicates the vertical span at the original wind speed. Indicates the original tension of the conductor. This indicates the tension of the conductor under adjusted wind speed;

[0024] The tension of the conductor under the adjusted wind speed With the original tension of the conductor The mechanical state equation is expressed as:

[0025] ;

[0026] in, Represents the cross-sectional area of ​​the conductor. Indicates the elastic modulus of the conductor. This indicates the gear ratio;

[0027] By solving the aforementioned mechanical state equation, the conductor tension under adjusted wind speed can be obtained. .

[0028] As an optional technical solution of the present invention, it also includes:

[0029] If it is determined that the wind speed of any phase suspension string will not be adjusted, then the original wind speed will be taken as the maximum allowable wind speed for the corresponding phase suspension string.

[0030] Secondly, an analysis system for the maximum allowable wind speed of suspension deflection of transmission line towers is provided, including: a data acquisition module for acquiring the original parameter data of transmission line towers;

[0031] The wind deflection angle calculation module is used to calculate the original wind deflection angle of each phase suspension string in the transmission line tower based on the original parameter data.

[0032] The wind speed adjustment module is used to compare the maximum wind deflection angle of each phase suspension string obtained in advance with the original wind deflection angle of each phase suspension string, and determine whether to adjust the wind speed based on the comparison result. If the wind speed is adjusted, the adjusted wind deflection angle of each phase suspension string is calculated based on the adjusted wind speed until the difference between the maximum wind deflection angle of each phase suspension string and the adjusted wind deflection angle is not greater than a preset threshold.

[0033] The maximum wind speed calculation module is used to subtract the preset gradient value from the adjusted wind speed and then use it as the maximum wind speed allowed for the corresponding phase suspension wind deflection.

[0034] The maximum wind speed confirmation module is used to take the minimum value among the maximum allowable wind speeds of the suspension series of each phase as the maximum allowable wind speed of the suspension series of the transmission line tower.

[0035] Thirdly, an analysis device for the maximum permissible wind speed of suspension deflection of transmission line towers is provided, comprising a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of the analysis method for the maximum permissible wind speed of suspension deflection of transmission line towers described in the first aspect.

[0036] Fourthly, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the analysis method for the maximum permissible wind speed of suspension deflection of transmission line towers as described in the first aspect.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] This invention provides an analysis method for the maximum allowable wind speed of suspension deflection of transmission line towers. By using the original parameter data of the transmission line towers and employing numerical solution methods, the maximum allowable wind speed of suspension deflection of the towers is calculated in reverse. This method is convenient for evaluating the maximum allowable wind speed of suspension deflection of towers in operation and has strong applicability. Attached Figure Description

[0039] Figure 1 This is a flowchart illustrating the analysis method for the maximum allowable wind speed of suspension deflection of transmission line towers in an embodiment of the present invention.

[0040] Figure 2 This is an analysis logic diagram of the maximum allowable wind speed for suspension deflection of transmission line towers in an embodiment of the present invention. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0042] Example 1

[0043] This embodiment provides a method for analyzing the maximum allowable wind speed for suspension deflection of transmission line towers, such as... Figure 1 As shown, the specific steps include the following:

[0044] Step 1: Obtain the original parameter data of the transmission line towers.

[0045] The original parameter data of transmission line towers include horizontal span, original wind speed, vertical span at the original wind speed, vertical load of suspension string, wind load of suspension string at the original wind speed, vertical load per unit length of conductor, load per unit length of conductor at the original wind speed, original tension of conductor, cross-sectional area of ​​conductor, elastic modulus of conductor, and representative span.

[0046] The original wind speed refers to the factory-designed wind speed of the transmission line tower.

[0047] Step 2: Based on the original wind speed, calculate the original wind deflection angle of each phase suspension string.

[0048] The original wind deflection angle of each phase suspension string is expressed as:

[0049] ;

[0050] in, Indicates the original wind deflection angle. This indicates the vertical load on the suspended string. G represents the suspended crosswind load at the original wind speed, and G represents the vertical load per unit length of conductor. This represents the load per unit length of conductor at the original wind speed. Indicates the horizontal spacing. This indicates the vertical span at the original wind speed.

[0051] Step 3: Compare the maximum wind deflection angle of each phase suspension string with the original wind deflection angle. Based on the comparison result, determine whether to adjust the wind speed. If the wind speed is adjusted, calculate the adjusted wind deflection angle of each phase suspension string based on the adjusted wind speed, until the difference between the maximum wind deflection angle of each phase suspension string and the adjusted wind deflection angle is not greater than the preset threshold.

[0052] If the difference between the maximum wind deflection angle and the original wind deflection angle of any phase suspension string is greater than a preset threshold, it is determined that the wind speed of the current phase suspension string needs to be adjusted to increase the wind speed by a preset gradient value. If it is determined that the wind speed of any phase suspension string does not need to be adjusted, the original wind speed is taken as the maximum allowable wind speed for the corresponding phase suspension string. In this embodiment, the preset threshold is 0.1°, and the preset gradient value is 0.1 m / s.

[0053] The adjustment wind deflection angle of each phase suspension string is expressed as:

[0054] ;

[0055] ;

[0056] ;

[0057] ;

[0058] ;

[0059] in, This indicates adjusting the wind deflection angle. This represents the suspended wind load at the original wind speed. This indicates the suspended crosswind load under adjusted wind speed, where G represents the vertical load per unit length of conductor. This represents the load per unit length of conductor under adjusted wind speed. G represents the load per unit length of conductor at the original wind speed. I This indicates the vertical load on the suspended string. Indicates the horizontal spacing. This indicates the vertical strut distance under adjusted wind speed. Indicates the original wind speed. This indicates an adjustment to the wind speed. This represents the wind load adjustment factor. This indicates the vertical span at the original wind speed. Indicates the original tension of the conductor. This indicates the tension of the conductor under adjusted wind speed.

[0060] The tension of the conductor under the adjusted wind speed With the original tension of the conductor The mechanical state equation is expressed as:

[0061] ;

[0062] in, Represents the cross-sectional area of ​​the conductor. Indicates the elastic modulus of the conductor. This indicates the gear ratio;

[0063] By solving the aforementioned mechanical state equation, the conductor tension under adjusted wind speed can be obtained. .

[0064] Step 4: Subtract the preset gradient value from the adjusted wind speed to obtain the maximum allowable wind speed for the corresponding phase suspension wind deflection.

[0065] If the difference between the maximum wind deflection angle and the adjusted wind deflection angle of any phase suspension string is not greater than a preset threshold, the current wind speed minus the preset gradient value is taken as the maximum allowable wind speed for the corresponding phase suspension string, so that at this maximum wind speed, the difference between the maximum wind deflection angle and the adjusted wind deflection angle is greater than the preset threshold.

[0066] Step 5: Take the minimum value among the maximum allowable wind speeds for suspension series deflection of each phase as the maximum allowable wind speed for suspension series deflection of the transmission line tower.

[0067] like Figure 2The calculation and analysis are performed phase by phase until all phases have been calculated. The minimum value among the maximum allowable wind speeds for suspension deflection of all phases is taken as the maximum allowable wind speed for suspension deflection of transmission line towers.

[0068] This method collects actual parameters of operating lines and uses numerical methods to back-calculate the maximum allowable wind speed for tower suspension deflection. The calculation results can be provided to the operating unit as evaluation results. The operating unit can determine the risk level of tower wind deflection tripping based on the comparison between this wind speed and the latest wind zone map, and formulate reasonable operation and maintenance strategies. This invention has important application value for assessing the wind deflection resistance of operating lines.

[0069] Example 2

[0070] This embodiment provides an analysis system for the maximum permissible wind speed of suspension deflection on transmission line towers, including:

[0071] The data acquisition module is used to acquire the raw parameter data of transmission line towers;

[0072] The wind deflection angle calculation module is used to calculate the original wind deflection angle of each phase suspension string in the transmission line tower based on the original parameter data.

[0073] The wind speed adjustment module is used to compare the maximum wind deflection angle of each phase suspension string obtained in advance with the original wind deflection angle of each phase suspension string, and determine whether to adjust the wind speed based on the comparison result. If the wind speed is adjusted, the adjusted wind deflection angle of each phase suspension string is calculated based on the adjusted wind speed until the difference between the maximum wind deflection angle of each phase suspension string and the adjusted wind deflection angle is not greater than a preset threshold.

[0074] The maximum wind speed calculation module is used to subtract the preset gradient value from the adjusted wind speed and then use it as the maximum wind speed allowed for the corresponding phase suspension wind deflection.

[0075] The maximum wind speed confirmation module is used to take the minimum value among the maximum allowable wind speeds of the suspension series of each phase as the maximum allowable wind speed of the suspension series of the transmission line tower.

[0076] Example 3

[0077] This embodiment provides an analysis device for the maximum permissible wind speed of suspension deflection of transmission line towers, including a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of the analysis method for the maximum permissible wind speed of suspension deflection of transmission line towers described in Embodiment 1.

[0078] Example 4

[0079] This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the analysis method for the maximum allowable wind speed of suspension deflection of transmission line towers as described in Embodiment 1.

[0080] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0081] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0082] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0083] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0084] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for analyzing the maximum allowable wind speed for suspension deflection of transmission line towers, characterized in that, include: Obtain the original parameter data of transmission line towers; Based on the original parameter data, the original wind deflection angle of each phase suspension string in the transmission line tower is calculated; The maximum wind deflection angle of each phase suspension string is compared with the original wind deflection angle of each phase suspension string. Based on the comparison result, it is determined whether to adjust the wind speed. If the wind speed is adjusted, the adjusted wind deflection angle of each phase suspension string is calculated based on the adjusted wind speed until the difference between the maximum wind deflection angle of each phase suspension string and the adjusted wind deflection angle is not greater than a preset threshold. The adjusted wind speed minus the preset gradient value is taken as the maximum allowable wind speed for the corresponding phase suspension wind deflection. The minimum value among the maximum allowable wind speeds for suspension deflection of each phase is taken as the maximum allowable wind speed for suspension deflection of the transmission line tower.

2. The method for analyzing the maximum allowable wind speed for suspension deflection of transmission line towers according to claim 1, characterized in that, The original parameter data of the transmission line towers include horizontal span, original wind speed, vertical span at the original wind speed, vertical load of the suspension string, wind load of the suspension string at the original wind speed, vertical load per unit length of conductor, load per unit length of conductor at the original wind speed, original tension of conductor, cross-sectional area of ​​conductor, elastic coefficient of conductor and representative span. The original wind speed refers to the factory-designed wind speed of the transmission line tower.

3. The method for analyzing the maximum allowable wind speed for suspension deflection of transmission line towers according to claim 1, characterized in that, The original wind deflection angle of each phase suspension string is expressed as: ； in, Indicates the original wind deflection angle. This indicates the vertical load on the suspended string. G represents the suspended crosswind load at the original wind speed, and G represents the vertical load per unit length of conductor. This represents the load per unit length of conductor at the original wind speed. Indicates the horizontal spacing. This indicates the vertical span at the original wind speed.

4. The method for analyzing the maximum allowable wind speed for suspension deflection of transmission line towers according to claim 1, characterized in that, The comparison of the maximum wind deflection angle and the original wind deflection angle of each phase suspension string, and the determination of whether to adjust the wind speed based on the comparison results, includes: If the difference between the maximum wind deflection angle and the original wind deflection angle of any phase suspension string is greater than a preset threshold, it is determined that the wind speed of the current phase suspension string needs to be adjusted.

5. The method for analyzing the maximum allowable wind speed for suspension deflection of transmission line towers according to claim 1, characterized in that, The adjustment wind deflection angle of each phase suspension string is expressed as: ； ； ； ； ； in, This indicates adjusting the wind deflection angle. This represents the suspended wind load at the original wind speed. This indicates the suspended crosswind load under adjusted wind speed, where G represents the vertical load per unit length of conductor. This represents the load per unit length of conductor under adjusted wind speed. G represents the load per unit length of conductor at the original wind speed. I This indicates the vertical load on the suspended string. Indicates the horizontal spacing. This indicates the vertical distance at which the wind speed is adjusted. Indicates the original wind speed. This indicates an adjustment to the wind speed. This represents the wind load adjustment factor. This indicates the vertical span at the original wind speed. Indicates the original tension of the conductor. This indicates the tension of the conductor under adjusted wind speed; The tension of the conductor under the adjusted wind speed With the original tension of the conductor The mechanical state equation is expressed as: ； in, Represents the cross-sectional area of ​​the conductor. Indicates the elastic modulus of the conductor. This indicates the gear ratio; By solving the aforementioned mechanical state equation, the conductor tension under adjusted wind speed can be obtained. .

6. The method for analyzing the maximum allowable wind speed for suspension deflection of transmission line towers according to claim 2, characterized in that, Also includes: If it is determined that the wind speed of any phase suspension string will not be adjusted, then the original wind speed will be taken as the maximum allowable wind speed for the corresponding phase suspension string.

7. A system for analyzing the maximum permissible wind speed for suspension deflection of transmission line towers, characterized in that, include: The data acquisition module is used to acquire the raw parameter data of transmission line towers; The wind deflection angle calculation module is used to calculate the original wind deflection angle of each phase suspension string in the transmission line tower based on the original parameter data. The wind speed adjustment module is used to compare the maximum wind deflection angle of each phase suspension string obtained in advance with the original wind deflection angle of each phase suspension string, and determine whether to adjust the wind speed based on the comparison result. If the wind speed is adjusted, the adjusted wind deflection angle of each phase suspension string is calculated based on the adjusted wind speed until the difference between the maximum wind deflection angle of each phase suspension string and the adjusted wind deflection angle is not greater than a preset threshold. The maximum wind speed calculation module is used to subtract the preset gradient value from the adjusted wind speed and then use it as the maximum wind speed allowed for the corresponding phase suspension wind deflection. The maximum wind speed confirmation module is used to take the minimum value among the maximum allowable wind speeds of the suspension series of each phase as the maximum allowable wind speed of the suspension series of the transmission line tower.

8. An analysis device for determining the maximum permissible wind speed of suspension deflection on transmission line towers, characterized in that, Including processor and storage media; The storage medium is used to store instructions; The processor is configured to operate according to the instructions to perform the steps of the analysis method for the maximum permissible wind speed of suspension deflection of transmission line towers as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the analysis method for the maximum permissible wind speed of suspension deflection of transmission line towers as described in any one of claims 1 to 6.

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