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Electric Power

From incandescent bulbs to fluorescents to LEDs, <a href="/node/772396">learn more</a> about the long history of the light bulb.

From incandescent bulbs to fluorescents to LEDs, learn more about the long history of the light bulb.

Electricity -- the flow of electrical power -- is a secondary energy source, generated by the conversion of primary sources of energy, like fossil, nuclear, wind or solar.

Keeping the power flowing to American homes and businesses is a critical necessity for everyday life and economic vitality. The Energy Department works to keep the grid secure from cyber and physical attacks; partners with states and other stakeholders to plan more resilient infrastructure that can better withstand extreme weather events; and supports efforts to increase grid efficiency and energy storage as more renewable energy sources come online.


How Synchrophasors are Bringing the Grid into the 21st Century
Power lines carry electricity across Washington State. | Photo courtesy of the Energy Department.

Learn about synchrophasors and how they are helping grid operators keep power flowing reliably to American homes and businesses.

Smoothing Renewable Wind Energy in Texas
The Notrees Wind Storage Demonstration Project is a 36-megawatt energy storage and power management system, which completed testing and became fully operational in December. It shows how energy storage can moderate the intermittent nature of wind by storing excess energy when the wind is blowing and making it available later to the electric grid to meet customer demand.

A west Texas town recently became home to the largest battery storage on a wind farm, thanks to investments from the Energy Department.

The War of the Currents: AC vs. DC Power
Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Photo courtesy of the Energy Department

Nikola Tesla and Thomas Edison played key roles in the War of the Currents. Learn more about AC and DC power -- and how they affect our electricity use today.

Q&A: Plugging In with a Power Lineman

Power lineman are integral in keeping the lights on. Here's a Q&A with a third-generation power lineman.