Unit Commitment: A New Truncated Method of Unit Combination

The utility industry can reduce its fuel cost by proper commitment of schedulable generating unit. In this paper, a new truncation of unit combinations is proposed which will greatly reduce the number of unit combinations to be considered for large systems. A dynamic programming optimization based digital computer program has been developed for this new approach.Data obtained from the National Electric Power Authority (NEPA) has been used to test the efficacy of this approach. The results indicate a significant reduction in cost over the method of just considering the first N possible unit combinations generated by binary powers

An Appraisal of NEPA's Generation Adequacy to Year 2000

A comprehensive framework for an assessment of NEPA’s generation adequacy is presented. Generation adequacy is the ability of a generation to supply its load taking into account the load fluctuations and random events that affect generation capacity. To assess this ability, depending on the assessment horizon, present and future load demands are prerequisites. Load forecast for 1989 through 2000 is presented. Reliability/adequacy indices which provide the means for quantifying system’s generation adequacy are considered. Generation adequacy assessment techniques are discussed and the loss of load method adopted. This method is demonstrated by applying it to the NEPA system and the generation adequacy assessed. Finally, a graphic representation of NEPA’s adequacy is presented