Análise de confiabilidade do sistema elétrico de uma plataforma de produção de petróleo e gás

Abstract

In this work, a reliability analysis of an oil production FPSO (Floating Production Storage and Offloading) platform’s electrical power system was performed using the PowerFactory® software. The failure rates and repair times, for the main generation system, were obtained from a platform generation system; for the distribution system, data were obtained from the available technical literature. This study evaluates the platform's reliability indexes for the generation and distribution systems by comparing the reliability performance in different operational scenarios and topologies. The platform’s load duration curve for one year of operation had been raised and used at the simulation. For the main generation system, two scenarios had been simulated, one with failure data from the generators according to electrical system's data and other scenario disregarding a failure that took 1,528.37 hours to be repaired in one of the generators. Therefore, the main generation risk model had been formed though the calculation of the Loss of Load Probability and Expected Demand Not Supplied. Using Frequency and Duration Method, the capacity outage probability tables had been added to the risk model for each main generation system simulated scenario. At the distribution system, eight operational topologies had been analyzed, in which one was the normal system’s operation and the other seven are contingency topologies defined according to a platform’s electrical system operational standard. At this simulation, system’s reliability indexes and load points indexes had been calculated. Differently of what practiced in most of electrical distribution systems reliability analyzes, the common mode failure between main turbogenerators and the power source of their auxiliaries had been taken into account.