Modeling for evaluation of safety instrumented systems with heterogeneous components
Cai, Baoping; Li, Wenchao; Liu, Yiliu; Shao, Xiaoyan; Zhang, Yanping; Zhao, Yi; Liu, Zengkai; Ji, Renjie; Liu, Yonghong
Peer reviewed, Journal article
Published version
Åpne
Permanent lenke
https://hdl.handle.net/11250/2979258Utgivelsesdato
2021Metadata
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Originalversjon
https://doi.org/10.1016/j.ress.2021.107823Sammendrag
A novel methodology for evaluation of safety instrumented systems (SISs) with heterogeneous components based on multi-stage dynamic Bayesian networks (MDBNs) is proposed. The unified evaluation model for M-out-of-N architectures based on MDBNs is constructed. An automatic modeling method of conditional probability tables for time-slice and inter-slice transitions is established. Average probability of failure on demand (PFDavg) and probability of failing safety (PFS) of the structure can be calculated by the established model. A method for calculating the life-cycle cost of SISs is presented by using the results of system evaluation and specific cost details. A high-integrity pressure protection system (HIPPS) is adopted to demonstrate the application of the proposed approach. A MDBNs-based evaluation and cost analysis software of heterogeneous redundant structure is developed by using MATLAB graphical user interface. The analysis of system evaluation results and life-cycle cost can help the designer determine the configuration of the heterogeneous redundant structure.