Infrastructural development

On the transmission free market, which presents ever-increasing opportunities for infrastructural development, Terna’s aim is to create and implement works and infrastructure, as both an asset investor and operator.

Latin America is the geographical area of most interest to Terna Plus.

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TernaPlus Progetti

The South American electricity sector

The South American electricity sector has experienced a profound transformation. Several countries have developed new regulatory systems: Chile in 1982, Argentina in 1992, Peru in 1993, Bolivia and Colombia in 1994, Brazil and Central American states such as Panama, El Salvador, Guatemala, Nicaragua, Costa Rica and Honduras in 1997.

It has become extremely important for local governments to revive the private sector’s role in managing electricity transmission and release the market from public control.

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Description of the market

The South American market is one with strong privatised growth, along with a consolidated regulatory framework and the chance for “fast” employment opportunities. The concessions awarded to Terna Plus are a solid guarantee of stability for the electricity sector.

We are involved in liberalised transmission markets such as Brazil, Peru and Uruguay and we continue to actively monitor the situations in other countries such as Chile and Colombia.

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Operational approach

We participate directly in international competitive processes organised by government agencies and local investment entities, aiming to make investments with a limited risk profile.

Ongoing projects

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In 2018, the construction activities continued for the power lines and substations on the two concessions; Santa Maria Transmissora de Energia (SMTE)), in Rio Grande do Sul and Santa Lúcia Transmissora de Energia (SLTE), in Mato Grosso. For SMTE, the Santa Maria 3 - Santo Angelo 2 line has already entered into service. For SLTE, activities are 99% complete and are expected to be completed in 2019. Both power lines have been created using low environmental impact single-stem pylons.


The activities started in 2017 continue for the construction of 132 km of new 138 kV power lines between Aguaytía and Pucallpa. In 2018, the infrastructural engineering activities were completed and the environmental certification process was initiated. For the permissions and authorisations, Terna met with the local population and submitted the documentation from environmental impact studies to the authorities. All the plots of land surrounding the perimeter of the power line were identified and activities for the acquisition of rights and land along the route were initiated. Procurement activities for the power line materials are in progress. The project is due to be completed by the end of 2020.


In 2018, we continued the construction work for the 500 kV “Melo-Tacuarembó” transmission line, which will be 213 km long. The engineering activities and load tests for the towers have been completed and the receipt and customs clearance of materials are under way. The civil works for the line are under way: at the end of 2018, over 60% of the foundation work was completed and installation of the towers was initiated. The work is due to be completed by the end of 2019.

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