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| Central Interconnected System (Chile) | |
|---|---|
| Name | Central Interconnected System (Chile) |
| Native name | Sistema Interconectado Central |
| Country | Chile |
| Status | Active |
| Owner | Various utilities |
| Operator | Coordinador Eléctrico Nacional |
| Primary fuel | Hydropower, Coal, Natural gas, Solar, Wind |
| Commissioned | 1927 (early grids) |
| Capacity | ~12 GW (varies) |
| Transmission voltage | 220 kV, 500 kV |
Central Interconnected System (Chile) The Central Interconnected System (Chile) is the principal electrical grid serving central Chile, linking metropolitan areas, industrial zones, and export harbors. It integrates generation from Hydroelectricity in Chile, Coal in Chile, Natural gas in Chile, Solar power in Chile, and Wind power in Chile to supply cities such as Santiago, Valparaíso, and Concepción while interfacing with regional grids and international energy markets.
The system connects major nodes including substations near Santo Domingo, Chile, Rancagua, Talca, Chillán, and Santa Cruz, Chile, forming a backbone that supports mining operations in Antofagasta Region, port terminals in San Antonio, Chile, and manufacturing in Biobío Region. The operator, Coordinador Eléctrico Nacional, coordinates dispatch with transmission owners like Transelec and distribution companies such as Enel Chile and Colbún S.A.. Key stakeholders include the Comisión Nacional de Energía (Chile), the Ministerio de Energía (Chile), and private investors from corporations like AES Corporation and Engie.
Early electrification involved utilities like Empresa Nacional de Electricidad (ENDESA) and projects in the Maule Region and O'Higgins Region, followed by interconnection efforts influenced by international practices from the United States and Canada. Post-deregulation reforms in the 1980s and 1990s mirrored models used in United Kingdom and Germany, reshaping roles for firms such as CGE (Chile) and leading to market institutions like the Superintendencia de Electricidad y Combustibles. Major milestones included the commissioning of large hydro projects such as Ralco Dam, the expansion of thermal plants by Colbún S.A. and Endesa Chile, and later renewables driven by firms like Solarpack and Acciona.
Generation assets within the system span facilities like Rucalhue, HidroAysén proposals (controversial), and thermal stations fueled by coal and gas from suppliers tied to projects with ENAP. Peak capacity has fluctuated with additions from Photovoltaics (PV) farms in the Atacama Desert developed by companies including Mainstream Renewable Power and First Solar. The portfolio includes dispatchable hydroelectric plants, combined cycle gas turbines by General Electric and Siemens, and wind farms by groups such as Pattern Energy. Large consumers include Codelco, SQM, and aluminium smelters tied to Compañía Minera Santo Domingo.
High-voltage corridors operate at 220 kV and 500 kV interlinking converter stations, substations, and long-distance lines built by Transelec and contractors from ABB and Siemens. Interconnection projects have sought to link the SIC with the Sistema Eléctrico Nacional (SEN) of the Magallanes Region and explore ties with neighboring Argentina via projects similar to Interconexión Eléctrica Argentina–Chile. Critical nodes include the Cardonal Substation and the El Transito Substation, with right-of-way negotiations involving municipalities such as Maipú, Chile and Lo Prado. Transmission constraints affect flows from renewables in Atacama Region to load centers in Metropolitan Region of Santiago.
Regulatory oversight involves the Comisión Nacional de Energía (Chile), the Ministerio de Energía (Chile), the Superintendencia de Electricidad y Combustibles, and the Coordinador Eléctrico Nacional enforcing grid codes influenced by international standards like those from ENTSO-E and practices adopted from North American Electric Reliability Corporation. Policy initiatives tie into national commitments under agreements such as the Paris Agreement and interact with law instruments including Chilean energy reforms enacted by the Congreso Nacional de Chile. Public consultations have included civil groups from Valdivia and NGOs such as World Wildlife Fund.
The market comprises generation companies, transmission owners, and distribution firms operating in spot and long-term contracts overseen by market rules similar to mechanisms used in California Independent System Operator and regional markets in South America. The Coordinador performs unit commitment and economic dispatch protocols accounting for ancillary services procured from providers like Endesa Chile and Colbún S.A.. Wholesale participants include traders and financial institutions such as Banco de Chile, Scotiabank Chile, and multinational utilities like Iberdrola. Retail supply involves regulated tariffs and unregulated customers including municipalities like Santiago and industrial clients such as CMPC.
Challenges include aging assets, transmission bottlenecks, integration of intermittent renewables from Atacama Desert and Coquimbo Region, and environmental controversies like those surrounding Río Baker and HidroAysén proposals. Modernization projects feature grid digitalization with equipment from Schneider Electric, deployment of battery storage pilot projects by firms like Tesla, Inc. and Fluence Energy, and demand response programs involving technology partners such as Siemens and ABB. Policy drivers involve decarbonization plans tied to the Ministry of Environment (Chile) commitments and international financing from institutions like the World Bank and the Inter-American Development Bank. Research collaborations engage universities including University of Chile, Pontifical Catholic University of Chile, and Federico Santa María Technical University working with think tanks such as CIPER Chile.
Category:Electric power in Chile