ABSTRACT
The failure probability of power delivery to i-th load (QGDi) is calculated through the top event probability of the respective fault tree, and the values of weighted failure probabilities of power delivery to loads are considered to get the overall measure of the power system reliability:
RPS = 1 − NL∑ i=1
QGDi Ki
K = 1 − QPS (1)
where RPS = power system reliability; QPS = power system unreliability; QGDi = failure probability of power delivery to i-th load (top event probability of the respective fault tree); NL = number of loads in system; Ki = capacity of i-th load; K = total capacity of the system.
