Holodeck reactor
Holodeck reactor was a technology used on Starfleet ships that powered the holodeck. 

In 2371, the crew of the  tried hooking up the holodeck reactor to the ship's systems for an additional power source. However, it ended up blowing half the relays on the ship. Ensign Harry Kim found that the holodeck reactor was not compatable with Voyagers systems. ()

de:Holodeck-Reaktor
Energy technology
Holographic technology