Distribution System Failure Assessment Using Fuzzy Fault Tree Analysis

Distribution system is the only connecting link of the power generation and load end. Any failure or malfunction at the end user have effective impact on the whole system. The health of distribution system is important for reliable operation of system. Random failure events and their records are not supportive for failure prediction. The fuzzy set theory is adopted to deal with the uncertainty of system failures occurrence. In this work, interval type-2 fuzzy set (IT2FS) based fuzzy fault tree analysis (FTA) has been proposed for failure probability estimation of load point and system failures. The proposed methodology is applied on RBTS bus 2 test system and results are compared with analytical method.