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The united frameworks of UHV and EHV substation belong to wind-sensitive structures, and wind load is one of the main control loads of the design. In this paper, a 500kV full united substation framework was used as the engineering background to explore the quantitative relationship between wind-induced vibration coefficient, damping coefficient and average wind speed of the full united framework. The results showed that the average wind speed and the damping coefficient of the framework have significant influence on the wind vibration coefficient of the framework. The research results in this paper not only provide theoretical and computational basis for the wind resistant design of the combined framework structures, but also provide a basis for formulating the design criteria of full united wind vibration coefficient. Introduction With the transformation of China's power transmission mode toward ultra high voltage (UHV) and extra high voltage (EHV) transmission technology, 500kV and 1000kV substation frameworks become one of the most important links in power grid system. Moreover, the cost of the frameworks occupies a large proportion in the entire transmission and distribution lines, and their security directly affects the safety and reliability of the entire power grid. In order to ensure the safety and reduce the project cost as far as possible, the most commonly used method is to use the full united framework layout. Different from the conventional substation frame, the load and its height and span of the 500kV and 1000kV fully united substation frame have a greater degree of increase, which have the characteristics of high height, heavy load and low self vibration frequency compared with other lower voltage grades [1] . In addition, the whole united transformer framework is provided with a frame beam at different height points according to the need of structural layout. This makes the windward side of the structure larger than that of the single portal type structure, and meanwhile, the whole structure tends to be flexible, making effect of wind load significant. Therefore, the structure is wind sensitive, and wind load is often the main or even decisive control load of design. In this study, a 500kV full united substation framework around the middle reaches of the Yangtze River was used as an engineering background. Based on random vibration theory, the wind vibration response and wind vibration coefficient of the transformer framework under different average wind speed and fluctuating wind speed were calculated and analyzed. The aim was to explore an effective way to obtain the wind load response characteristics of the designed structure quickly in the design stage, providing a reference for the optimization design of wind resistant structure and defect diagnosis.

Quantitative Relationship of Wind Vibration Coefficient, Average Wind Speed and Damping Coefficient of United Framework of Transformer Substation