Power transmission line wind tunnel test system and method applied to typhoon field

Abstract

The invention discloses a power transmission line wind tunnel test system and method applied to a typhoon field. The typhoon field is used as a test wind field. The test system consists of a test tower made according to a discrete stiffness method, two tangent towers serving as far-end supports, two strain towers, six four-span four-bundle conductors, two four-span ground wires and 18 insulator chains. The test is carried out respectively at three wind angles of 90 degrees, 75 degrees and 60 degrees. Through an aeroelastic model multi-angle wind tunnel test, the displacement and the acceleration response of the test tower under the conditions of different wind speeds and different wind angles in the typhoon field can be tested, the gust response coefficient of a concerned part can be calculated, and the characteristics of wind-induced response of the power transmission line in the typhoon field are analyzed through comparison with those in a well-conditioned wind field.

Description

technical field [0001] The invention belongs to the wind resistance research of transmission lines, in particular to the typhoon resistance research field based on the aeroelastic model wind tunnel test. Background technique [0002] At present, the wind tunnel test research on the wind-induced response of transmission lines mainly uses the aeroelastic model (referred to as the aeroelastic model, the same below), and the domestic transmission tower aeroelastic models generally include concentrated stiffness method, discrete stiffness method and rigid segment There are three kinds of V-shaped spring method. The concentrated stiffness method is simple to manufacture, but the simulation of the stiffness is not accurate, it cannot simulate the torsional stiffness of the tower, and it cannot simulate the vibration of the rods and the interaction between the rods; the method of adding rigid segments and V-shaped springs is also relatively easy , but it cannot simulate the vibrati...

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Problems solved by technology

However, the southeast and southern coastal areas of my country are often disturbed by typhoons in summer. Typhoons have strong winds, large affected areas, and obvious randomness. There are obvious differences in wind field parameters from those in good wind fields. The good wind is obviously different, and the existing wind tunnel tests for transmission lines in the good atmospheric boundary layer model are difficult to meet the requirements of anti-typhoon design

At present, the wind tunnel test of the aeroelastic model of the tower line system is restricted by the span of the ground wire and the size of the wind tunnel. Reflects the vibration of the transmission line at other wind angles. In fact, the transmission line is more dangerous at other wind angles

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