Transmission lines are the energy superhighways of an electric system, carrying large amounts of electricity from power plants over long distances to our homes and businesses.
SDG&E® has over 1,800 miles of transmission lines in our service territory, but only two connections to the state’s electricity grid. This increases the region's vulnerability to energy supply shortages, especially during times of emergency. As a result, SDG&E has taken positive steps to relieve congestion and upgrade portions of its existing system.
Here are some of the ways were making improvements to strengthen our electrical system and renewable energy to our homes and businesses.
We recently completed work on the Otay-Metro Powerloop, the first major high-voltage underground transmission line in San Diego. The project was prompted, in part, by the increase in new energy supplies built in San Diego County, including the Otay Mesa Energy Center.
We have also received CPUC approval to construct the Sunrise Powerlink as a new major transmission project that will connect San Diego to the renewable energy supplies found in the Imperial Valley.
As part of our ongoing commitment to renewable energy, the ECO substation project will help boost the emerging renewable energy industry in eastern San Diego and Imperial Counties.
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