Proposal of Simplified Method to Evaluate the Seismic Behavior of High Voltage Electrical Equipment in Order to Carry Out Seismic Risk Studies of Lifeline

Abstract eng:
A simplified method to evaluate the seismic behavior of high voltage electrical equipment is presented. Last seismic events occurred in Mexico had demonstrated the seismic vulnerability of lifeline, specially, the high voltage equipment of electrical substation. The electrical equipments damages had been analyzed carefully and it had been identified that the geometrical configuration (similar to an inverted pendulum) increases the seismic vulnerability of the equipment. Unfortunately, there are electrical and mechanical restrictions that required this configuration. This leads to looking for alternatives or methods to know better the seismic behavior of electrical equipments, in order to improve the structural behavior meanly of circuit breakers, and current and voltage transformers. In this paper, seismic analyses of electrical equipment were carried out considering the seismic criterions of IEEE693's recommendation and the seismic criterions of CALSISEE (seismic recommendation for electrical equipment in Mexico). An instrumentation program was carried out to verify the numerical models. And, a simplified alternative to check the structural state of this type of equipment is proposal. This assessment process can be implemented in a mitigation program in order to reduce the seismic damage in the electrical facilities.

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