Which statement best describes the function of the transmission grid?

• A. It serves as the backbone by transferring high-voltage power over long distances.
• B. It stores energy for peak demand.
• C. It is used only for renewable energy.
• D. It converts DC to AC.

Answer: (A)

The transmission grid serves as the backbone of the electric system by moving large amounts of power at high voltage over long distances. By boosting generation voltage and then stepping it down for delivery, it minimizes current and reduces I²R losses, making it efficient to transport energy from far-away plants to where people use it. This network connects a wide mix of generation sources—fossil, hydro, nuclear, wind, and solar—and enables power to be shared across regions, improving reliability and regional balancing.

Energy storage is not a function of the transmission grid itself, so it isn’t about storing energy for peak demand. The grid also isn’t limited to renewable energy; it carries power from all types of generation. While there are HVDC links in some cases, the grid is primarily an AC transmission network, with DC conversion handled by specialized equipment rather than being its defining role.