Chile has four separate electric systems: the Sistema Interconectado Central (SIC), which serves the central part of the county; the Sistema Interconectado del Norte Grande (SING), which serves the desert mining regions in the north; and the Aysen and Magallanes systems, which serve small areas of the extreme southern part of the country. The systems are mostly autonomous, as long distances between the four make integration difficult. Transelec controls almost the entire national transmission grid that serves the four systems. In August 2006, Hydro-Quebec sold its majority stake in Transelec to a consortium of private investors.
Of the four electricity systems, the largest is the SIC, which covers the major population centers surrounding Santiago and serves over 90 percent of all electricity customers. In the SIC, the most important player is Enersis, majority owned by Spain’s Endesa. Enersis holds controlling stakes of both the largest generating company, Endesa, and the largest distribution company, Chilectra, which serves about half of Chile’s population.
Hydroelectric Generating Plants in Chile
(10 MWe and greater)