Probabilistic angle stability index

摘要: This paper develops a novel concept and computational framework of probabilistic transient stability index called the expected angle margin, EASM, for electrical power systems. new integrated provides common (angle) characteristic over set possible system configurations contingencies, disturbances faults, load demand levels on basis. The EASM expresses general "fitness" variety operating conditions. contingencies covered by is selected basis developed weighted probability index, WPI. WPI accounts contingency probability, economical, social values corresponding configurations. proposed can be effectively used to assess average system. It also evaluates impact decision-making in reinforcement expansion planning, an objective formal optimization procedure combined stability/reliability studies. A scheme tested using IEEE 25-Bus Reliability Test System.