Centrais Elétricas Brasileiras SA (Eletrobras) is a mixed-capital company controlled by the Brazilian government, constituted by Law no. 3,890-A, of April 25, 1961. Since its creation, Eletrobras has contributed to the expansion of energy supply Development of the country. Currently, the company operates directly in the control of 13 subsidiaries of generation, transmission and distribution of electricity, a research center (Eletrobras CEPEL) and a holding company (Eletrobras Eletropar). In addition, it owns half of the capital stock of Itaipu Binacional and holds interests in more than 170 Special Purpose Companies (SPE) and in 26 companies.