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.

TernaPlus V2 LineSeparator

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.

TernaPlus V2 LineSeparator

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.

TernaPlus V2 LineSeparator

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

TernaPlus V2 LineSeparator


In 2019, construction work was completed on the lines and substations for the Santa Lucia Transmissora de Energia (SLTE) concession, which joined the Santa Maria Transmissora de Energia (SMTE) already in operation in the last months of 2018. Meanwhile, development activities in Brazil continued with the acquisition of a majority stake in a new concession, Linha Verde II, for the construction of an additional 153 km of 500 kV lines in the state of Minas Gerais. The project is currently under construction and is expected to be completed by 2021.


The activities started in 2017 continue for the construction of 132 km of new 138 kV power lines between Aguaytía and Pucallpa. In 2019, once environmental authorisations had been obtained and easement acquisition activities had progressed adequately, construction of the line began with the civil activities currently under way. In the meantime, a Collaboration Agreement was signed with the Parish of Chacas in Peru for the implementation of a new power line to connect the Huallin Hydroelectric Power Plant (owned by the Parish of Chacas) and EPC activities are currently under way, carried out by Terna Plus.


In 2019, construction of the 213 km long 500 kV “Melo -Tacuarembó” transmission line was completed. The construction phase was completed in October 2019, in accordance with the contractual terms of the operating lease contract signed with the local utility.

Photo gallery