Evaluation method and device for identification accuracy of transmission tower damping ratio
A technology of identification accuracy and evaluation method, applied in geometric CAD, special data processing applications, etc., can solve problems such as affecting transmission lines and inaccurate evaluation methods, and achieve the effect of simple methods
Active Publication Date: 2020-04-10
CHINA ELECTRIC POWER RES INST +2
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[0005] In view of this, the present invention proposes a method and device for evaluating the accuracy of damping ratio identification of transmission towers, aiming to solve the problem that the existing evaluation method for identifying accuracy of damping ratio is inaccurate and affects the calculation accuracy of dynamic load of transmission lines
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[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0026] Method example:
[0027] see figure 1 and figure 2 . As shown in the figure, the method includes the following steps:
[0028] The sample number ...
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The invention provides a method and apparatus for evaluating the damping ratio recognition accuracy of a power transmission tower. The method comprises the following steps: calculating the number of damping ratio recognition value samples of the power transmission tower according to a preset collection time and collection frequency; determining an allowable error range of a damping ratio recognition value according to the number of the damping ratio recognition value samples; determining a space of the damping ratio recognition value samples of the power transmission tower according to the number of the damping ratio recognition value samples; determining the damping ratio recognition accuracy of the power transmission tower according to the space of the damping ratio recognition value samples and the allowable error range of the damping ratio recognition value; and comparing the damping ratio recognition accuracy with preset accuracy, and if the damping ratio recognition accuracy is greater than the preset accuracy, determining that the number of the damping ratio recognition value samples satisfies precision requirements. By adoption of the method for evaluating the damping ratio recognition accuracy of the power transmission tower provided by the invention, the damping ratio recognition accuracy of the power transmission tower is evaluated accurately, and theoretical basis is provided for accurate calculation of dynamic load of transmission lines.
Description
technical field [0001] The invention relates to the technical field of testing vibration characteristics of transmission towers, in particular to a method and device for evaluating the accuracy of identification of the damping ratio of transmission towers. Background technique [0002] The structural damping ratio of transmission tower is an important parameter for calculating dynamic loads such as wind vibration coefficient and ice-covered disconnection load. When calculating the gust response of towers in the "Guidelines for Loading of Transmission Line Structures" in the United States, the damping ratio values of lattice transmission towers, H-shaped frames and poles are respectively given. Significantly affected. [0003] The frequency and damping ratio corresponding to a certain mode shape of the transmission tower are always associated with each other. The accuracy of frequency identification is easy to guarantee, but it has always been a difficult problem to accu...
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IPC IPC(8): G06F30/13
CPCG06F30/13
Inventor 杨风利张宏杰
Owner CHINA ELECTRIC POWER RES INST