Unified solution of security-constrained unit commitment problem using a linear programming methodology

With the advent of open markets trading of power as a commodity, secure operation is an enduring concern of the independent system operator. A comprehensive security-constrained unit commitment (SCUC) methodology to coordinate a secure and economic generation pattern for the day-ahead market is an urgent requirement. An ineffective coordination of electric power transfer over the transmission lines could result in congestion, and inadvertently an outage cause through line overloading. In the current practice, the SCUC is solved by decoupling the cost evaluation aspect from the network security aspect. The primary frequency regulation reserve deployable in a manner after a (n-1) contingency has not been fully utilised in the present approaches.