Unit availability considerations in composite-system generation planning

Abstract

his paper proposes a method for generation expansion planning including reliability considerations at the composite-system level. Probability distributions of capacity of additional units are included in the model. Using DC load flow model, the problem is formulated as a two-stage recourse model with the objective to minimize expansion cost. The expected power loss is included in the model as a constraint. Random uncertainties in generation, transmission lines, and load are included in the model resulting in a large number of system states. The expected power loss is then approximated using a technique called Sample-Average Approximation (SAA) with Monte Carlo sampling. The method is illustrated on a 24-bus IEEE-RTS.