Major Chilean grid connection on schedule for completion by mid-2017

The SIC and SING grid connection has been the subject of great debate in the industry. Carlos Finat, ACERA, discusses. Flickr: ACERA

The major connection between Chile’s Northernmost and Central grids, which will provide a larger market for the high concentration of solar PV in Chile’s north, is expected to be complete by mid-2017, according to a leading industry figure.

Construction on the project to connect the Northern Interconnected System grid (SING) with the Central Interconnected System grid (SIC) in Chile started in July last year.

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Chile has four main separate electricity networks, which means that the high penetration of utility-scale solar in the desert regions of the North cannot provide power to the most populated central regions around Santiago until the Northern and Central grids are interlinked.

Chile-based utility E-CL, a subsidiary of French energy company Engie, formerly GDF Suez, the largest independent power producer in the world, was awarded the connection project. The project will be developed by E-CL subsidiary Transmisora Eléctrica del Norte (TEN).

Many industry members have been expecting delays in the Mejillones–Cardones transmission line project completion until 2018/19 at the earliest, however, Carlos Finat, executive director of the Chilean Renewable Energy Association (ACERA), told PV Tech that he expects the connection to complete on time by mid-2017.

He added: “Any project of this size can be delayed [by] a few months. Instead of having it by mid-2017, it may be online by the end of 2017 or the first month of 2018, [however] it is a reasonable delay in a project such as this.”

Moreover, Finat said there is only a “low probability” of any delay. Despite facing some level of opposition, the project has a major advantage in that the developer already has most of the approvals for the land on which the connection line will be built. Most of it will also be built in the desert, away from villages, cities and other communities.

Finat added: “It is going to face opposition as any project of this kind [would], but the project is not in a critical zone.”

The outlook for solar in Chile and its surpassing of 1GW cumulative installed capacity is discussed by Finat and other industry members in a feature on PV Tech published today.

The SIC/SING grid connection strategy has been approved as part of a national transmission plan that is not specifically related to the development of solar energy, said Finat. However, it will benefit solar by bringing a larger market to PV projects located in the North. The Northernmost grid also happens to be the smallest network in Chile so the benefits of connecting to this larger market will be felt acutely.

Furthermore the connection will allow the interchange of energy between the grids depending on relative fuel prices, which means this is a “key project”, added Finat.

The concentration of renewables is particularly high in the north. Chile's society for industrial development Sofofa recently reported that of the US$58 billion invested in renewable energy projects in various stages of development as of December last year, nearly US$40 billion will be spent in the northern regions of Antofagasta, Atacama and Coquimbo.

The Atacama desert has incredible solar resources but it is far away from demand centres. Flickr: Danielle Pereira

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