Power Transfer Grid

Power grid or 'Power Transfer Grid is an informal term for a system that sends energy throughout a starship, facility or even a planet. These grids can make use of electricity, Electro-plasma or any number of energy sources. The Federation makes use of a power grid known as the EPS, the primary energy distribution system on their ships and stations.

In 2369, a power transfer grid failed on Deep Space 9, and the upper docking pylons were disabled as a result. (DS9: "A Man Alone")

In 2372, Admiral Leyton had Red Squad sabotage the computers of the Division of Planetary Operations causing Earth's power grid to fail. (DS9: "Paradise Lost")

The Orion Syndicate planned to interrupt the power grid of the Klingon embassy on Farius Prime and assassinate the Ambassador before the backups came online. (DS9: "Honor Among Thieves")

Upon entering an energy barrier of a planet in the Rutharian sector, the Chaffee's power grid began to fail. (DS9: "The Sound of Her Voice")

In 2375 in the Mirror Universe, Rom was able to take the power grid of the Regent's flagship offline, leaving it open to attack by the Defiant. (DS9: "The Emperor's New Cloak")

According to the Star Trek: The Next Generation Technical Manual, the power grid transfered electricity from a source (usually a power converter fed by the EPS) to areas where it was needed using electrically-conductive wires or materials. The power transfer grid was similar to a main electrical grid on 20th and 21st century Earth.