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The economic expansion of Chile has led to a GDP growth of over 170% in the last 10 years [1], pushing up the demand for electricity, which has been covered by a steady raise of its production, from 42.2 TWh in 2002 to 65.8 TWh in 2012 [2]. Due to its geography, Chile presents five major independent electric transmission systems. The main two, providing 99% of the country’s energy [3], are the SIC (Interconnected Central System) in the centre of the country and the SING (Interconnected System of the Grand North), covering the northern most 800 km of the territory [4]. In 2013 the SIC generated 47.8 TWh, while the SING generated 15.4 TWh [3]. The electricity supply generated in SING is 99% fossil fuel dependent [5]. At the country level, hydro energy coversaround one third of the electricity generated [5], while more than 60% of it is produced from fossil fuels, which are almost entirely imported [6], while around one third is provided by hydro energy [5]. This structure has affected the security of the electricity supply in the past, due to specific climatic events (that altered the hydro-electricity generation) and due to fuel import problems [4] [7]. Over the years, copper mining has been the main consumer of electricity in the country, requiring 32% of the total [8]. This number reached 83% in the SING zone in 2013 (12.8TWh from a total of 15.414 TWh) [9] [3]. To improve the security of electricity supply, the Chilean government has recently adopted policies to support projects that harvest non-conventional renewable energies (NCRE). The target for the electricity produced by NCRE is set at 20% of the domestic demand by 2025 [10]. As a reference: the share of solar generation by 2013 was 0.02% in the SING and 0.01% in the SIC [5].

Electrical design of a 100MW plant in the North of Chile