[en] Brazil has gone through its worst crisis in electricity supply in the past fifty years. The justifications for the current crisis are found in the eighties, when there was a long period of under investment in the sector, until then controlled and managed exclusively by the state, especially in the expansion of generation and power transmission network. The lack of financial resources by the state led to the delay or suspension of expansion projects. Consumption, meanwhile, increased when the economy grew and continued to increase even when the economy stagnated, as more people gained access to electricity. It became imperative, then implode the model that barely functioned at that time under the command of the state and devise a new model for the electricity sector, which should have as main goals: to attract the participation of private investment coupled with gradual tariff reduction the State, in addition to increased competition among agents in the chain, to enable the pricing more affordable to society, and better quality services. (author)