Modelling station-originated outages in composite system using state duration sampling simulation approach

Substations and switching stations (herein referred to only as stations) are the pivotal parts of power systems. Failure events in stations often result in multiple outages of generators, lines, and bulk load points in a composite system, which may have serious impact on the security and stability of power systems. This paper presents the application of a Monte Carlo simulation method to the reliability evaluation of stations in transmission systems. The comprehensive impacts of station-originated failure events on composite systems are investigated using the developed technique. The proposed approach is illustrated by application to a test system. The effect of breaker failure rate in station on system reliability indices is also assessed in the paper. The paper provides valuable information for decisionmaking in power system planning and operation. (C) 2000 Elsevier Science Ltd. All rights reserved.