Tucuruí – Manaus – Macapá Interconnection

Changes in the configuration of the 69 kVManaus supply system, derived from Manaus and Mauá 3 substations, required adjustments in the Load Relief Regional Scheme (ERAC). Likewise, studies developed for Amapá were revised, since this system’s new generation units changed significantly the area performance. Throughout the year, distribution companies implemented the new settings set by the studies, adding more security to areas, in order to face any contingencies resulting in islanding, separating them from the rest of the BIPS.

Pre-operational studies for the integration of the (3 x 73 MW) Cachoeira do Caldeirão hydroplant were performed in the state of Amapá. This plant’sgeneration surplus and of additional hydro plants in the region (Santo Antônio do Jari, Ferreira Gomes and Coaracy Nunes) create scenarios in which energy exports in this state is high, requiring the definition of specific control and protection measures. This is the case, for example, of the generation dropping scheme to ensure the stable operation of the island composed by the power plants and by the Manaus and / or Macapásystem after double contingency in the region’s 230 or 500 kV trunks.