Regulation issues for renewable energy integration into electrical markets

European legislation evolution has followed the dynamics of deregulation that allowed the evolvement of the installed power capacity on renewable resources in parallel with the development of the technologies on renewable resources. This depends directly on technical and legislative factors related to the economic support to the investment for the construction of this type of power generation systems. The strengths and weaknesses of each stage of regulation can be analyzed following the Spanish energy model. The first phase of liberalization of the market for the production of electric power has been funded. Here technologies used for the generation of installed power from renewable sources have not observed criteria of availability of renewable resources and efficiency in electricity production, as much as expected. The demand for electric energy should match efficient generation, as peaks of consumption demand higher production of electricity. Thus, there should be no need to have installed total power several times greater than the electrical power required. The evolution of electric generation systems according to relevant legislation demonstrates that optimizing the choice of energy mix from renewable sources must prioritize the implementation of concentrating solar thermal plants.