Abstract

The power system need to sustain high reliability due to its complexity and security. The reliability prediction method is usually based on independent failure. However, the common cause failure affects many components simultaneously in a system, and it turns out the system collapse seriously in a wide range. Therefore, to improve the reliability of the power system practically, the analysis using the common cause failure is required. This paper describes the common cause failure modeling combined with independent failure. Using the dynamic fault tree, the incorporated independent failure and common cause failure are proposed and analyzed, and it is applied to the power substation in order to examine the method.

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