3-D Base Control Systems for Substation Equipment


Abstract eng:
Equipment, like air core reactors, switch yard structures, capacitor banks or platforms, in electrical substations frequently consists of sensitive material or a vulnerable assembly. In areas with high seismicity special seismic protection measures are required as electricity is of extreme importance for the operation of lifeline structures as hospitals, emergency centers and power plants. The experience in earthquake protection of machinery and buildings, as discussed in [1], can also be applied to substation equipment. This article illustrates basic principles of 3-dimensional Base Control Systems (BCS). These systems consist of elements with helical steel springs and viscous dampers. Depending on the project specific details spring elements with special stiffness properties, e.g. as described in [2], in combination with an increase of damping are used to reduce the seismic accelerations levels of the supported structures. Practical examples present the high efficiency of the suggested control system for the protection of equipment against seismic impacts in horizontal and vertical direction. Details of the seismic protection of air core reactors, located in a high seismic zone in California, USA are discussed as well. The main mass is placed on a substructure consisting of ceramic footings and stiffening steel cradles. The footings are extremely fragile and in danger of failure during a seismic event. The seismic requirements are related to [3]. For the seismic protection the base cradle is arranged on a BCS leading to a significant improvement of the seismic behavior of the important equipment.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 4954.:
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