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Measurement method of power transmission line iced conductor galloping aerodynamic parameters

A transmission line and wire galloping technology, which is used in aerodynamic tests, testing of machine/structural components, measuring devices, etc., can solve problems such as the inability to reflect the influence of torsion on the aerodynamic system, and the short length of transmission line wires.

Active Publication Date: 2015-09-16
西安金源电气股份有限公司
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  • Abstract
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Problems solved by technology

However, at present, the aerodynamic parameters of transmission lines are mostly measured in laboratories or wind tunnels, but in actual measurements, it is found that setting a specific ice shape and due to the short length of the transmission line wires cannot reflect the impact of torsion on aerodynamics. system impact

Method used

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  • Measurement method of power transmission line iced conductor galloping aerodynamic parameters
  • Measurement method of power transmission line iced conductor galloping aerodynamic parameters
  • Measurement method of power transmission line iced conductor galloping aerodynamic parameters

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Embodiment Construction

[0066] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0067] The method for measuring the aerodynamic parameters of the galloping aerodynamic parameters of the ice-coated conductor of the transmission line of the present invention, such as figure 1 As shown, the specific steps are as follows:

[0068] Step 1. Use the tension sensor, inclination sensor, and angular velocity sensor to measure the ice-coated conductor of the transmission line, and obtain the tension T of the insulator string before the ice-coated conductor of the transmission line dances. 1 , The pulling force T when galloping occurs on the ice-coated conductor of the transmission line 2 , The inclination angle θ of the ice-coated conductor of the transmission line before galloping 1 , The inclination angle θ of the ice-coated conductor of the transmission line when galloping occurs 2 and the wind angle, the galloping torque M o...

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Abstract

The invention discloses a measurement method of power transmission line iced conductor galloping aerodynamic parameters. The measurement method includes the following steps that: the galloping lift coefficient, galloping drag coefficient and galloping torque coefficient of a power transmission line iced conductor are acquired; 2) a plurality of cameras are utilized to perform multi-angle image capture on the power transmission line iced conductor, and the icing outline of the power transmission line iced conductor is obtained through a "three-tower two-gear" equivalent icing thickness mechanical calculation model, and an icing shape is obtained through fitting, and therefore, an actual icing shape of the power transmission line iced conductor can be obtained; 3) an inertial navigation sensor is used in combination with power transmission line conductor galloping trajectory reduction technology, so that the real-time wind attack angle of the power transmission line iced conductor can be obtained; 4) all the obtained data are utilized to draw aerodynamic parameter curves under the actual icing shape and the wind attack angle, and as a result the measurement of the galloping aerodynamic parameters of the power transmission line iced conductor can be completed. With the measurement method of the invention adopted, the aerodynamic parameters in the galloping of the power transmission line iced conductor can be measured actually.

Description

technical field [0001] The invention belongs to the technical field of measurement methods for conductor galloping of power transmission lines, and in particular relates to a method for measuring aerodynamic parameters of galloping of ice-coated conductors of power transmission lines. Background technique [0002] The galloping of ice-coated conductors on transmission lines will lead to a sharp decline in the mechanical and electrical performance of the transmission lines, which may easily cause phase-to-phase flashover, damage to hardware and insulators, broken strands and broken wires, loosening and falling off of tower bolts, damage to tower materials, damage to foundations, and more serious It caused the tower collapse accident. [0003] In the current research, obtaining the air lift coefficient, drag coefficient and torsion coefficient under the conditions of different icing shapes and wind attack angles is an urgent task to study the galloping of transmission lines. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06
Inventor 黄新波徐冠华马龙涛肖渊朱永灿赵阳
Owner 西安金源电气股份有限公司
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