This paper studies the possible gains of rep- resenting hydropower systems with a new model consisting of two stations instead of the usual one station representa- tion. The equivalent is obtained by solving an optimization problem where the aim is to find parameters which mini- mizes the difference in the production plans obtained from the two optimization problems corresponding to the original system and the equivalent respectively. This is in it self an uncommon optimization problem type. The paper also pro- vides numerical examples.

Two-station equivalent of hydro power systems

The authors present generation expansion planning for large, mainly hydroelectric, power systems, employing a disaggregate representation for the primary existing and candidate hydro plants, and several aggregate representations for the rest of the hydro plants and making use of the equivalent reservoir technique The formulation and conditions of use of three types of aggregations for the hydro plants are discussed The goal is to provide versatile technique for building equivalent reservoirs from subbasins >

A.H.M. Santos

Papers

The use of both aggregate and disaggregate representations for the hydroelectric power plants, in the expansion planning of hydrothermal power systems