Analysis of an All-Electric Safety Subsea Actuation System Architecture

2020 Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2020-01-01 DOI:10.1109/RAMS48030.2020.9153641

Tobias Winter, Markus Glaser, B. Bertsche, Sebastian Imle, Julian Popp

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引用次数: 2

Abstract

The paper compares a state of the art electro-hydraulic actuation system with a novel all-electric actuation system for subsea x-mas trees. For this purpose, the two systems are compared to each other based on the same method. The capability of providing the safety is analyzed based on the functional safety standard for electrical, electronic programmable devices. The architectures of both designs are presented. The components of each system are described in detail and the data used for the safety analysis are provided. Based on the failure rates for each component the probability of failure on demand is calculated and discussed. The resulting probability of failure on demand (PFD) is analyzed regarding the shares of the total PFD. The resulting safety integrity levels (SIL) of both systems are determined. The electric system provides by factor two lower PFD compared to the hydraulic system. Each component is allocated to the component type and to the Safe Failure Fraction (SFF) based on the Hardware Fault Tolerance (HFT). The conclusion shows the significant difference in the diagnostic coverage of both systems.

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全电动安全水下驱动系统架构分析

本文将最先进的电液驱动系统与新型的海底x-mas采油树全电动驱动系统进行了比较。为此，基于相同的方法对两个系统进行比较。根据电气、电子可编程设备的功能安全标准，对其提供安全的能力进行了分析。给出了两种设计的体系结构。详细描述了每个系统的组成部分，并提供了用于安全分析的数据。根据各部件的故障率，计算并讨论了按需故障的概率。分析了按需故障概率(PFD)在总PFD中所占的比例。确定两个系统的最终安全完整性等级(SIL)。与液压系统相比，电动系统的PFD降低了2倍。每个组件被分配到组件类型和基于硬件容错(HFT)的安全故障分数(SFF)。结论表明两种系统的诊断覆盖率存在显著差异。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 Annual Reliability and Maintainability Symposium (RAMS)

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