The plasma network was the computer propulsion system managing the plasma usage aboard a starship.
In 2153, two Borg-assimilated Tarkaleans disrupted the plasma network of Enterprise NX-01, main power was failing. (ENT: "Regeneration")
The same year, radiation from a debris field affected the ship's systems and caused a surge in the plasma network. (ENT: "Stratagem")
In 2374, when a bulkhead collapsed in Jefferies tube 84 aboard the USS Voyager, Harry Kim excluded an overload because the plasma network was stable. (VOY: "Prey")
During the Hirogen takeover of the Voyager, Turanj informed Karr about a problem in the engineering section, the warp plasma network became unstable. (VOY: "The Killing Game")
In 2376, Chakotay ordered to re-route all energy from the plasma network so Tuvok could activate the deflector beam. (VOY: "Fair Haven")