This paper presents a computationally viable means of incorporating the DC load flow model in the decomposition-simulation method of multi-area reliability evaluation. The implementation described herein uses a multi-state generation model for each area, a cluster-based multi-area load model which accommodates load correlation between areas, a linear programming model with DC load flow constraints for determining the partitioning states in the decomposition phase, and a similar LP model for determining acceptability of sampled states in the simulation phase. Formulations have been described which enhance the speed and accuracy of the method. The implementation has been tested on 3-area, 4-area, and 5-area cases, and the results obtained have been compared with those produced by an explicit Monte-Carlo simulation. While the results obtained from both methods are similar, the method described has been shown to be considerably faster than explicit simulation.
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