Dynamic properties of substation support structures |
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| Affiliation: | 1. Clinical-Laboratory Center of Power System & Protection, Faculty of Intelligent Systems Engineering and Data Science, Persian Gulf University, Bushehr 7516913817, Iran;2. Department of Electrical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran;3. IPSA Research Centre Islamic Azad University, Central Tehran Branch, Tehran, Iran;1. University of Strathclyde, Technology and Innovation Centre, 99 George Street, Glasgow, G1 1RD, UK;2. University of Edinburgh, Faraday Building, Mayfield Road, Edinburgh, EH9 3JL, UK |
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| Abstract: | Substation electrical equipment is usually mounted on different kinds of structures, which can have a very significant effect on the motion that the supported equipment will experience during an earthquake. In this paper, a parametric study is implemented in order to assess dynamic properties of substation support structures.In the first phase of this study, a simplified Four Degrees-of-Freedom (4-DOF) system is proposed in order to model different support-equipment systems and is verified through finite element method (FEM). Based on the proposed model, a practical equation is proposed to calculate the fundamental natural frequency of support-equipment systems and compared to the one proposed by ASCE (substation structure design guide, 2008). Furthermore, dynamic amplification factor (DAF) of substation support structures is calculated, and effect of different parameters (e.g. support mass, height and stiffness) is discussed. Finally, a new criterion is developed to restrict maximum acceleration at support-equipment intersection.Results of this paper can be utilized in order to design more proper support structures to preserve substation electrical equipment from seismic induced damages. |
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