POWER-SYSTEMS MARGINAL COST CURVE AND ITS APPLICATIONS

This paper presents a forward recursive procedure to calculate the exp ected system marginal cost curve (EMC). The EMC formulation allows for multi-state and multi-block dispatch of generating units and is used to determine the optimal energy of pumped-storage units. A new approac h is developed to compute the first and second derivatives of the expe cted generation energy of a thermal unit with respect to the capacity of all thermal units in the system. The salient feature of the propose d approach is that it applies to hydro-thermal systems with multiple l imited-energy hydro units.