Aerial optical cable stress calculation method based on artificial fish school-Newton iteration

A Newton iteration and overhead optical cable technology, applied in the field of high-voltage transmission lines, can solve problems such as high computational complexity, poor real-time performance, and large computational load, and achieve the goal of overcoming the large randomness of the results, reducing the computational load and computational complexity, The effect of reducing maintenance costs

Pending Publication Date: 2021-11-26
JIANGNAN UNIV +1
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Problems solved by technology

[0006] Aiming at the problems that the existing optical cable stress calculation method has a large amount of calculation, high calculation complexity under different environmental conditions, and poor real-time performance, the present invention proposes an overhead optical cable stress calculation method based on artificial fish school-Newton iteration, which It is characterized in that the method comprises:

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  • Aerial optical cable stress calculation method based on artificial fish school-Newton iteration
  • Aerial optical cable stress calculation method based on artificial fish school-Newton iteration
  • Aerial optical cable stress calculation method based on artificial fish school-Newton iteration

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Embodiment 1

[0060] This embodiment provides a method for calculating the stress of an overhead optical cable based on artificial fish swarm-Newton iteration, and the algorithm includes:

[0061] Step 1: Convert the optical cable state equation into a modulus function according to the multi-objective conversion method;

[0062] The state equation of the optical cable is:

[0063]

[0064] According to the multi-objective transformation method, the above state equation is transformed into:

[0065]

[0066] Among them, l is the horizontal span between the two towers; σ m is the known stress, σ m The specific load and temperature under the meteorological conditions are g m , t m ; σ n is the stress to be sought, σ n The specific loading and temperature under the meteorological conditions are g n , t n ; α, E are the thermal expansion coefficient and elastic coefficient of the optical cable; M and N are known numbers that can be obtained.

[0067] Step 2: Use the artificial fis...

Embodiment 2

[0101]This example provides an overhead optical cable stress algorithm based on artificial fish swarm-Newton iterative hybrid method, taking OPGW-24B1-100 optical cable as an example for calculation, the algorithm includes:

[0102] Step 1: According to the multi-objective transformation method, the state equation of the optical cable is transformed into a modulus function for finding the minimum value, and the solution problem is transformed into an optimization problem;

[0103] The physical performance parameters of OPGW-24B1-100 optical cable are shown in Table 1.

[0104] Table 1 Physical performance parameters of OPGW-24B1-100 optical cable

[0105]

[0106]

[0107] The critical span is calculated to be 1277.64m. When the representative span is less than 1277.64m, the control condition is the annual average temperature and the control tension is 30400N; when the representative span is greater than 1277.64m, the control condition is icing and the control tension is...

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Abstract

The invention discloses an aerial optical cable stress calculation method based on artificial fish school-Newton iteration, and belongs to the technical field of high-voltage transmission lines. According to the method, the stress of the aerial optical cable is solved by using the artificial fish swarm algorithm, and the solving problem of a nonlinear optical cable state equation is converted into an optimization problem, so that the calculation complexity is reduced; the optimal stress value solved by the artificial fish swarm algorithm serves as an initial value and is substituted into a Newton iteration method for calculation, a final stress value is obtained, and the problems that when the optical cable stress is calculated through the artificial fish swarm algorithm, the result randomness is large, and precision is not enough are further solved; and meanwhile, the corresponding optimal unit stress value can be calculated according to different horizontal spans, optical cable parameters and meteorological conditions, so that the Newton iteration algorithm can calculate the final optical cable stress according to the initial stress values in different environments. The optical cable stress calculation speed is high, the real-time performance is better, and compared with an existing method, the method is more suitable for an actual engineering design scene.

Description

technical field [0001] The invention relates to a method for calculating the stress of an overhead optical cable based on artificial fish school-Newton iteration, and belongs to the technical field of high-voltage transmission lines. Background technique [0002] Aerial optical cables (hereinafter collectively referred to as optical cables) refer to various composite cables and special optical cables that are hung on poles and towers and are used in power systems for both power transmission and information communication. The multiplier type has the advantages of being able to use the original overhead lines, saving construction costs, and shortening the construction period. However, optical cables are easily affected by environmental changes and other external forces in the air, resulting in failures. After the optical cable is erected, it is stressed under harsh natural conditions (such as temperature changes, wind speed, ice coating, etc.), causing the optical cable itsel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06N3/00G06F119/14
CPCG06F30/27G06N3/006G06F2119/14
Inventor 李正权高子涵张鹏强董永奎张禄马可周燕萍尹锋雷毛文沛施春富
Owner JIANGNAN UNIV
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