Published

2022-11-01

HFFB Test and Wind-Induced Vibration Analysis on 1 000 kV Transformer Frame

Prueba HFFB y análisis de vibraciones eólicas en una estructura de transformadores de 1 000 kV

Keywords:

high-frequency force balance test, finite element analysis, 1000 kV transformer frame, shape factor, wind-induced vibration coefficient (en)
prueba de equilibrio de fuerzas de alta frecuencia, análisis de elementos finitos, estructuras de transformadores de 1000 kV, factor de forma, factor de vibración eólica (es)

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Authors

  • Wennian Shang Shandong Electric Power Engineering Consulting Institute Co.
  • Jun Gong Harbin Institute of Technology https://orcid.org/0000-0002-1396-9828
  • Xudong Zhi Harbin Institute of Technology
  • Haoyang Wang Harbin Institute of Technology

In order to propose a complete, wind-resistant design method for ultra-high voltage (UHV) transformer frames, the wind-induced vibration characteristics of a 1 000 kV transformer frame (TF1000) were studied using a high-frequency force balance (HFFB) test. Five section models and one whole model of the TF1000 were designed and constructed using 3D printing, and these were evaluated in a wind tunnel by means of HFFB tests for multiple loading scenarios. The finite element method (FEM) was used on the test data to analyze the wind-induced vibration on the TF1000. The results demonstrate that the shape factor of the TF1000 is significantly affected by the flow field type and solidity ratio; the minimum value occurs when the wind direction is between 30 and 45°. Moreover, all the shape factor values obtained by the test are larger than those established by the Chinese code. The wind-induced vibration analysis indicates that the most unfavorable wind direction for the TF1000 is approximately 60°, with a wind-induced vibration coefficient between 1,7 and 3,9.

Para proponer un método completo y resistente al viento para estructuras de transformadores de tensión ultra alta (UHV), se estudiaron las propiedades de vibración eólica de una estructura de transformadores de alta presión de 1 000 kV (TF1000) mediante una prueba de equilibrio de fuerzas de alta frecuencia (HFFB). Se diseñaron y elaboraron cinco modelos de sección y un modelo integral para el TF1000 utilizando impresión 3D y se evaluaron en un túnel de viento mediante pruebas HFFB para varios escenarios de carga. Se utilizó el método de los elementos finitos (FEM) en los datos de prueba para analizar la vibración eólica en el TF1000. Los resultados demuestran que los factores de forma del TF1000 se ven significativamente afectados por el tipo de campo de flujo y la relación de solidez; el valor más bajo ocurre cuando la dirección del viento está entre 30 y 45º. Además, todos los factores de forma obtenidos en la prueba fueron superiores a los valores prescritos en el código chino. El análisis de las vibraciones eólicas indica que la dirección del viento más desfavorable para el TF1000 es aproximadamente 60°, con un coeficiente de vibración eólica entre 1,7 y 3,9.

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