Assessment of the security of operating electric power systems using probability methods

A review is given of probability methods which have been proposed for the assessment of the security of operating electric power systems. The goal of all the methods presented is to provide the system operator with a consistent, on-line, indication of system security in the near-term future as a guide for operating decisions. Mathematical models used in the various methods are described and data requirements are discussed. Finally, areas of desirable future investigation are outlined.