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Power transmission line wind vibration calculation method under random wind load

A calculation method and transmission line technology, applied in the direction of calculation, electrical digital data processing, design optimization/simulation, etc., to achieve the effect of small calculation amount, less memory occupation, and fast calculation speed

Active Publication Date: 2016-07-06
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a wind-induced calculation method for transmission lines under random wind loads, so as to solve the technical problems existing in the existing random wind load analysis methods

Method used

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  • Power transmission line wind vibration calculation method under random wind load
  • Power transmission line wind vibration calculation method under random wind load
  • Power transmission line wind vibration calculation method under random wind load

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Embodiment Construction

[0032] The present invention a kind of transmission line wind vibration calculation method under random wind load, comprises the following steps:

[0033] Step 1: Perform form-finding on the finite element model of the tower-line coupling system under self-weight and average wind load. The form-finding process is as follows: figure 1 As shown, it specifically includes the following steps:

[0034] The first step is to establish a finite element model of the transmission line tower-line coupling system;

[0035] In the second step, calculate the average wind load

[0036] It is divided into wind load calculation of transmission tower and wind load calculation of ground wire. Discretize the structure of the transmission tower, divide the tower into several sections for processing, each section takes the wind speed at the average height of the section as the average wind speed, calculate the wind pressure of each section according to the Bernoulli equation, and combine the wind...

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Abstract

The invention discloses a power transmission line wind vibration calculation method under random wind load. The power transmission line wind vibration calculation method comprises the following steps: 1: carrying out formfinding on a tower line coupled system finite element model under dead load and average wind load; 2: simulating a pulsation wind speed field to obtain a pulsation wind speed time history; and 3: carrying out wind vibration response calculation: transforming the pulsation wind speed time history obtained in 2) into wind load, applying the wind load to the finite element model which finishes formfinding under the dead load and the average wind load in 1), carrying out transient solving, and extracting a displacement and stress result to finish wind vibration calculation after solving. In the power transmission line wind vibration calculation, average wind speed and pulsation wind speed are separably processed, the pulsation wind speed is applied to a coupled model which finishes formfinding under the average wind load to carry out calculation so as to solve the problem of high iterations and small possibility of convergence of a traditional wind vibration analysis method, and calculation time is shortened.

Description

technical field [0001] The invention relates to the technical field of transmission lines, in particular to a calculation method for wind vibration of transmission lines under random wind loads. Background technique [0002] my country's power energy and load distribution is uneven. The west is rich in energy, but the power load is concentrated in the east. Considering economic and environmental benefits, power plants are generally built in energy bases, and the power generated by the power plant is transmitted to the load by transmission lines. center. Transmission lines are mainly erected by overhead lines. Line equipment is exposed to the natural environment for a long time, and is vulnerable to various weather conditions such as wind and ice, and has a high probability of failure. Wind load is an important factor affecting the safe operation of high-voltage overhead transmission lines. Wind load increases the stress of overhead lines, and additional bending moments are g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 贺博厉天威豆敏娜罗兵修娅萍刘磊王雨李敏李斌唐力
Owner XI AN JIAOTONG UNIV
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