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Cemig, through its subsidiaries and electricity transmission affiliates, operates a transmission network of 15,650 kilometers. It is the second largest power transmission group in the country.
This transmission system is responsible for transportation of large blocks of energy from the big generators centers to the consumer centers, enabling, through transmission substations located throughout various regions of the concession area, the service to the subtransmission and distribution systems.
Cemig transmits the energy generated in its hydroelectric plants and energy purchased from Itaipu, the interconnected Power System and other sources.
Currently, Cemig has 43.36% of the total capital of the  Transmissora Aliança de Energia Elétrica S.A. (Taesa), which operates in the electricity transmission market and is present in the states of Pará, Maranhão, Piauí, Rio Grande do Norte, Paraiba, Pernambuco, Tocantins, Bahia, Goiás, Mato Grosso, Minas Gerais, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul and DF.
Taesa is one of the largest private groups of electricity transmission in Brazil in terms of Annual Income Permitted (RAP). The company is exclusively dedicated to the construction, operation and maintenance of transmission assets, with approximately 9,760 km of transmission lines in operation, plus a concession acquired at auction, that will own approximately 85 km long.
Furthermore, it has assets in 69 substations with voltage level between 230 and 525 kV, it is present in all regions of the country and an Operation and Control Center located in Brasilia. Currently Taesa has 28 transmission concessions, owning 100% of the assets of thirteen concessions, share in ETAU, Brasnorte and thirteen concessions of TBE (Transmissoras Brasileiras de Energia).
With the operation, Cemig expanded its power transmission network, increasing its share in this sector (in Brazil) from 5.4% to 12.6%.


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