Powered on September 10th, the transmission system that connects Manaus (AM) to Boa Vista (RR) already demonstrates concrete gains for the security of supply in the SIN (National Interconnected System).
According to the ONS (National Electric System Operator), two recent events highlighted the importance of the new interconnection in preventing load loss: the unavailability of transmission lines in Pará and the reduction in gas supply pressure in the Manaus region.
"Due to the drop in gas pressure in the Amazon, thermoelectric plants were automatically shut down. With the interconnection, it was possible to increase generation by approximately 55 MW at the Roraima System plants, maintaining flow balance in the transmission lines," explained Christiano Vieira, ONS's Director of Operations.
According to ONS Director General Marcio Rea, the integration between the systems has already ensured greater stability and flow control between Amazonas and Roraima, which translates into greater energy and operational security.
At 724 kilometers long, with a double 500 kV circuit, the power line completes the country's energy map, which now totals more than 170 thousand kilometers of transmission lines.
The project received investments of around R$3,3 billion and involved the installation of 1.390 towers, connecting the Eng. Lechuga substation in Manaus to the Boa Vista substation in Roraima, crossing nine municipalities in both states.
The last Brazilian state still isolated from the SIN, Roraima experienced blackouts and power outages for decades – a result of its dependence on expensive and polluting fossil fuel-fired thermal plants and the instability of the Guri power line in Venezuela, which served the region intermittently.
The transmission line's entry into operation represents a historic milestone for the North of the country, ending a long period of energy vulnerability and paving the way for a safer and more sustainable supply.
The project was auctioned in September 2011 by ANEEL (National Electric Energy Agency) and acquired by Transnorte Energia (TNE) – a consortium formed by Alupar (51%) and Eletronorte (49%) –, with delivery originally scheduled for 2015. Problems with environmental licensing, however, especially regarding the crossing of approximately 122 km through Waimiri-Atroari indigenous lands, prevented the progress of the works.
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Manaus–Boa Vista transmission line begins operation and connects Roraima to the SIN
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