Modeling and assessment of station originated outages for composite systems reliability evaluation

Abstract

This paper considers the impact that terminal station failure events have on the contingencies of connected lines and generators which should be included in the reliability evaluation of a composite system. It describes algorithm which simulate various failure modes of station components, deduce the resulting contingencies and their reliability indices, group together identical contingencies and cumulate the resulting reliability indices. This is a new approach for determining the effect of station failures on station-originated outages. The results can be used to assess the reliability of the stations themelves and as input data to a composite system reliability evaluation technique.

Research on Common-Mode and Dependent (CMD) Outage Events in Power Systems– A Review

“…Models of substation-related outages that have been used in the reliability analysis of composite power systems are presented in [34]- [36]. [14]- [18].…”

Substation reliability evaluation including switching actions with redundant components

“…The first [2,3] has been concerned with deducing system states, their likelihood and the impact they have on connectivity including the modelling of active and passive failures. The second [4,5,6] has been concerned with the deduction of station-originated outages in a composite generation and transmission system due to active and passive failures in substations. Few, if any, have dealt with the assessment of the sequential complex reconfiguration events that can be used to recover energy supply following component failures and protection relay responses [l].…”

“…The various failure modes in substations which can cause station-originated outages are [5,6] Active failure events are all component faults that cause the operation of the primary protection zone (breakers) around the failed component. An example is a short-circuit fault.…”

“…The overlapping failure events usually considered are those involving only two station components. The probability of higher-order outages is normally negligible [5]. …”

“…In previously developed concepts [5,6], the assumption was made that all circuit breakers (and disconnect switches) are normally closed. However, this assumption is not always valid, and in order to incorporate switching actions with redundant components, a set of enhanced algorithms was developed, resulting in a more realistic simulation approach.…”