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TITLE: Reliability Modeling of All-Digital Protection Systems Including Impact of Repair | |
Abstract—
Abstract—This paper explores the impact of including compo- nent repair on the reliability modeling of all-digital protection sys- tems. It is shown that repairable and nonrepairable assumptions make a remarkable difference in the computed reliability indices of the mean time to failure (MTTF) and the mean time to ?rst failure (MTTFF). Theoretical analysis of basic system structures consisting of two components is ?rst examined. Then, a typical all-digital protection system architecture i s modeled and numer- ically analyzed. Some interesting results are found by comparing reliability indices of MTTF and MTTFF and explanations of these results are p rovided.
Keywords— All-digital protection system, mean time to failure (MTTF), mean time to ?rst failure (MTTFF), protection, protec- tive relaying, reliability modeling, repair |
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