Customized Component Reliability Importance Measures for Electricity Transmission Systems

摘要

Different existing reliability importance measures, including Birnbaum,Fussell-Vesely, Risk Reduction Worth (RRW), Risk Achievement Worth (RAW) among others have been proposed in the past. They are generally very useful but they can not be directly applied in the electricity transmission systems (ETS) area because these methodologies were developed on the assumption that there is a definite life time period of every component in the system. In the area of ETS, the different components of the system have no definite time period and are expected to work endlessly without any failure. In addition to this, component and system reliability is expressed in terms of outage rates rather than probability of failure. In the present work, some of the pre-existing importance criticality measure measures have been transformed to be successfully used in the electricity transmission systems area. These new extended measures pertain to the outage rate of the component instead of the probability of failure. The proposed formulas are applied in different typical system configurations in the power industry such as breaker-and-a-half and the dual element spot network (DESN) schemes.