A transmission linewind speed field simulation method considering the spatial and temporal distribution characteristics of wind loads is presented

Abstract

The invention relates to a transmission line wind speed field simulation method considering the space-time distribution characteristics of wind load, comprising the following steps: 1) the average wind speed field simulation and the fluctuating wind speed field simulation are carried out to obtain the time series of the average wind speed value and the fluctuating wind speed of each point; 2) thatfluctuating wind speed time series is superimposed on the average wind speed value of each point to obtain the actual wind speed time series; 3) cyclic shift transformation is performed on the fluctuating wind speed time series obtained in the step 1) to obtain a set of wind speed time series considering the space-time distribution characteristics; 4) The wind speed time series considering the spatial and temporal distribution characteristics is transformed into the wind load data, which is applied to the finite element model of transmission line in the form of segmentation, and the transientsolution is performed and displacement is extracted, and the wind vibration calculation of transmission line is completed by the stress result. The present invention provides a basis for further wind-induced vibration response analysis of transmission lines considering the temporal and spatial distribution characteristics of wind loads, and then reduces the harm of wind loads to high-voltage transmission lines.

Description

technical field [0001] The invention relates to the field of wind resistance design of transmission lines, in particular to a method for simulating the wind speed field of transmission lines considering the temporal and spatial distribution characteristics of wind loads, which reduces the damage caused by wind loads to high-voltage transmission lines and improves the reliability of transmission lines. Background technique [0002] The stability and reliability of high-voltage transmission lines are directly related to the safety of the overall operation of the power system, and are the key to ensuring the effective transmission of electrical energy. Because high-voltage transmission lines are exposed to the natural environment for a long time, they are easily attacked by various weather conditions such as wind and ice, and the probability of failure is high. According to statistics, about 70% of power system supply failures are caused by overhead transmission line failures. ...

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Problems solved by technology

[0004] Traditional transmission line wind vibration analysis methods and transmission line wind field simulation methods have done a lot of research on the wind vibration response of transmission lines from the perspective of statics and structural dynamics, but they have not considered the temporal and spatial distribution correlation and its impact on transmission line wind vibration. Response impact

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