Aimorés Hydroelectric Power Plant

Aimorés HPP

Inauguration

May 5, 2006

Installed Power

330 MW

Generating Units

3 units

Main River Basin

Doce River

Feeding Capacity

Supply of more than 1 million inhabitants

The Eliezer Batista Hydroelectric Power Plant, popularly known as the Aimorés Power Plant, was inaugurated on May 5, 2006.

The plant is located on the border between the states of Minas Gerais and Espírito Santo. Its reservoir occupies areas of the Minas Gerais municipalities of Aimorés, Itueta and Resplendor and the Espírito Santo municipality of Baixo Guandu is also part of the project’s area of influence. The Aimorés Plant was named “Eliezer Batista Hydroelectric Power Plant” in honor of the engineer who stood out in Brazil and abroad for his innovative initiatives and in defense of sustainable development practices.

The plant, which has a generation potential of 330 MW (three Kaplan-type turbines, with a generation capacity of 110 MW each), is located in the middle stretch of the Doce River and its axis is located above (upstream) the end of the reservoir of the Mascarenhas Hydroelectric Power Plant (about 10 km) and the mouth of the Manhuaçu River (3 km). The amount of energy generated by the Aimorés Plant is defined by the flow of the Doce River and the need of the National Interconnected System. Who controls the amount of energy to be generated is the National System Operator (ONS).

Its construction took place through a partnership between Vale and Cemig, which together formed the Aimorés Hydroelectric Consortium, with 51% and 49% of the shares, respectively. In February 2015, the project was incorporated by Aliança Geração de Energia S.A., which has since been responsible for the management and operation of the project.

Come and visit the Aimorés Hydroelectric Power Plant/MG

Aliança's socio-environmental performance at the Aimorés/MG HPP

Turbines

The Aimorés HPP has 3 Kaplan-type turbines, coupled to the three generators with generation capacities of 110MW each, totaling 330MW of installed capacity. This energy is enough to supply a city with about 1 million inhabitants.

Spillway

The spillway of the Aimorés HPP has 10 regulation gates, which can be activated to control the water level in the reservoir during rainy periods, when there is an increase in the affluent flow. Annually, the floodgates are tested to assess the adequacy of response during opening; these are the so-called Extravasor Tests. The structure is designed to withstand decamillenar floods.

Fish Transposition System - STP

The transposition of fish at the Aimorés HPP is carried out through a system popularly known as fish ladder.

The System works throughout the year, but its greatest relevance is during the spawning period, from November to February, when the fish go up the river for reproduction. In the STP, monitoring is carried out, which quantifies and qualifies the species. These studies also contribute to the adoption of measures for the protection and conservation of fish species in the region.

Powerhouse

The Power House concentrates the entire operation of the hydroelectric plant. In it, the electrical, mechanical and suction galleries are located, as well as the Generating Units for energy production. Next to the powerhouse is the control building, which houses the control room, from where the systems and equipment that make up the Aimorés Plant are operated, which is teleassisted, and can also be operated from the Cemig Operation Center, in Belo Horizonte.

Auxiliary Dam

The spillway of the Aimorés HPP has 10 regulation gates, which can be activated to control the water level in the reservoir during rainy periods, when there is an increase in the affluent flow. Annually, the floodgates are tested to assess the adequacy of response during opening; these are the so-called Extravasor Tests. The structure is designed to withstand decamillenar floods.

Substation

The energy generated at the Aimorés Plant is taken to a substation, a high-power electrical installation, and from there it goes to the distribution lines. From there, the energy is distributed by the local energy distribution companies.