A Reliability Evaluation Method for Independent Small Offshore Electric Systems

Abstract

As an independent power system, the reliability of offshore electric system is closely related to the smooth progress of offshore oil production. There are two major characteristics of this type of power system. One is that it includes a generation system, transmission system, as well as a distribution system, and the other is that the load shedding measures in the event of a fault are different from that of the onshore power grid. Therefore, traditional reliability assessment models and algorithms cannot be used directly. Based on the theory of overall reliability evaluation, a reliability evaluation method suitable for offshore electric systems and the corresponding reliability indicators are proposed in this paper. In state sampling, the overall system sampling is divided into generation system sampling, transmission system sampling, and distribution system sampling based on the hybrid sampling theory. In state assessment, the priority decoupling load shedding model and the cascade fault model are established considering the actual production. At the end of this paper, the power system of an offshore oil platform is taken as an actual example to calculate the reliability index. Based on the failure analysis, relevant measures to improve the reliability of the system are proposed.

Fuzzy Inference System Development for Turbogenerator Failure Diagnosis on Floating Production Offloading and Storage Platform

“…In oil and gas production platforms like FPSO (Floating Production Storage and Offloading), typically producing over 150,000 barrels per day (BPD) of oil and 7 million m 3 /day of gas [1], as well as, with new projects where those facilities have capacity to produce up to 225,000 BPD of oil and 12 million m 3 /day of gas [2], the production interruption cost is very significant. Therefore, the diagnosis of failures is an important tool to set actions to achieve higher platform availability [3].…”

Application of Generation Adequacy Analysis for Reliability Evaluation of a Floating Production Storage and Offloading Platform Power System

“…Its relevance is due to the high interruption costs that penalize customers. In oil and gas production platforms like FPSO (Floating Production Storage and Offloading) producing over 150.000 barrels per day (BPD) of oil and 7 million m 3 /day of gas, where the production interruption is costly [3], such evaluation can be an important tool to measure the power generation system performance and to perform actions to achieve higher platforms' availability [4].…”