Optimal Corrective Rescheduling for Power System Security*

This paper presents a computational procedure to reschedule generation and power interchanges in an optimal manner. Rescheduling is used as a means for correcting a potentially dangerous operating condition and bringing a vulnerable system into a secure operating state. A linear-programming formulation of the optimal rescheduling problem is developed, and the method is illustrated on a small network example. Rigorous formulation and inclusion of all security- related constraints assures that the solution always represents a secure system. This preventive procedure has a potential for on-line implementation, and is shown to be a natural adjunct of on-line contingency evaluation.