Abstract
This paper presents the current stage of some types of hybrid electric and thermal power plants which are being developed worldwide. The first part contains an analysis of hybrid power plants PV-CSP which produce electric and thermal energy by means of the solar concentrated method, as well as an analysis of the main types of power plants, while the second part comprises a description of the power plants that produce thermal energy using the combination of solar energy and biomass. There is also an analysis of the highest yields which are obtained in optimum climatic conditions of CSP, based on the type of solar concentrators, their worldwide evolution, examples of hybrid systems that use both solar and biomass energy, the functioning principle, trade applications, their advantages and disadvantages, followed by conclusion regarding the types of studied hybrid power plants.