Brazilian utility sector regulator Aneel has approved contracts signed between state-run telecoms operator Telebrás and local power companies Furnas, Chesf, Eletrosul and Eletronorte for use of their fiber optic networks, news service Agência Estado reported.
All the power companies are controlled by Brazilian state-run utility holding Eletrobras.
Telebrás expects to use the distributors' network infrastructure under the country's national broadband program, dubbed PNBL.
The approved contracts will last for 10 years and were signed in February, according to the report.
Telebrás will pay some 3mn reais (US$1.84mn) this year to use the networks.
The cost of providing high-speed internet access to more than 1,100 Brazilian cities had been estimated at 1bn reais. But in January, as part of President Dilma Rousseff's pledge to bring austerity to Brasília, the budget was cut by about 400mn reais.