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This work presents a linear solution for the short-term hydro-thermal scheduling problem linked to long-term conditions through a piecewise-linear Future Cost Function (FCF). Given end-point conditions to conform long-term water releases, and given actual reservoir conditions, a segment of a pre-built piecewise future cost function will be chosen. The linear characteristic of the FCF segment will...
In short term hydro scheduling and optimization in a pure hydro system, a viable objective function is to minimize the water drawdown from a long term reservoir, thereby utilizing the characteristics and shape of efficiency curves for individual units, waterways and stations. This paper addresses the representation of key concepts related to these efficiencies, as represented by the generation and...
Generation scheduling is an important component of power systems operation in a market environment. Electricity demand in different areas depends on local marginal prices in the wholesale market. The paper presents a model for mid-term optimization of electricity generation in the hydrothermal power systems. The scheduling aims to minimize total production cost. Elasticity of consumer demand is taken...
The short-term unit commitment (UC) problem in hydrothermal power generation is a large-scale, mixed-integer nonlinear program, which is difficult to solve efficiently, especially for large-scale instances. It is possible to approximate the nonlinear objective function of the problem by means of piecewise-linear functions, so that UC can be approximated by an mixed-integer linear program (MILP); applying...
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