electric grid overview...electric grid overview pg&e’s electric grid is designed to deliver...

*“Unspecified Power” refers to electricity generated that is not traceable to specificgeneration sources by any auditable contract trail.

**These figures are preliminary and will not be finalized until verified by the CaliforniaEnergy Commission.

2013 electric power mix delivered to retail customers

The flow of electricity Electric Grid Overview

PG&E’s electric grid is designed to deliver safe, reliable energy to customers throughout our service area.

Renewable

28%

18%

10%

22%

22%  Hydroelectric

Unspecified

Natural Gas

Nuclear

Power Generation

Electricity is generated by a diverse mix of sources, including renewable, hydroelectric and nuclear. It flows from the power plant where it is generated onto the electric grid through a transmission substation.

Transmission lines are connected to substations and move high-voltage electricity in bulk from power plants to distribution substations.

Transmission Substations Transmission Lines

Transmission substations convert electricity to high voltages, so it can be efficiently carried over long distances. They can also serve as the connection point between different transmission lines.

Distribution Substations Distribution Lines Homes and

Businesses Electricity is then used by the 16 Distribution lines carry electricity at Distribution substations connect million people we serve in California lower voltages and deliver it to homes transmission lines to distribution lines. to power their homes and businesses. and businesses. These substations lower the voltage of Customers with solar or renewable en- electricity, so it can be safely delivered ergy systems also put electricity back to homes and businesses. onto the local power grid. In fact, we have helped customers connect more solar systems to the local power grid than any other utility in the country.

Learn more at pge.com/northernsanjoaquinpc or by calling 1-888-743-1175 or emailing northernsanjoaquinpc@pge.com. "PG&E" refers to Pacific Gas and Electric Company, a subsidiary of PG&E Corporation. ©2015 Pacific Gas and Electric Company. All rights reserved.