In this work, a study of a layout coupling between a solar thermal energy collection system and cogeneration power plants is developed and proposed as a mean to enhance the efficiency of existing units. It aims proving the technical feasibility of the integration of a linear Fresnel solar collector system to a cogeneration power plant localized in the state of Mato Grosso. The plant is equipped with two backpressure turbines and a condensation turbine. In addition to these turbines, two steam generators operate burning the bagasse provided by the sugar and ethanol production milling process during harvest. The proposal is to use the system of collectors as a way to heat the feed water of the boilers to a higher temperature than the originally designed one, in order to decrease the consumption of combustible during harvest and rise the electrical power production during the off-season. To do the analysis of the dynamic operation of the collector during one typical meteorological year experienced by the plant, it is necessary to develop an algorithm that quantify the performance indicators such as the efficiency of energy conversion, the increase of electrical generation and the percentage of saved combustible. The variables considered in the project will be the area of the solar collector system, the optical efficiency and the temperature of the water in the outlet of the collectors. The principal objective of this work is to present a study that shows what is the impact obtained on the combustible consumption and the increase of electrical power generation when using a hybrid cogeneration system, which means a cogeneration power plant and a linear Fresnel solar collector system coupled to heat the feed water of the boiler.