Eu acredito que ele significa Sistema de eletro-plasma
The electro-plasma system (EPS for short, or more specifically the electro-plasma distribution network, as engineers like to call it) is the primary form of energy distribution on starships.
The technology is based on storing energy in a highly energetic plasma, "electro-plasma," and distributing it throughout the ship via plasma conduits, called EPS conduits. The system of conduits is also referred to as the plasma grid. EPS conduits usually start at a matter-antimatter reaction assembly, also called the warp core, where matter is converted to energy, and extend to all areas of a ship. Plasma conduit power levels are regulated by plasma coolant ducts, and monitored by plasma conversion sensors.
Aqui estão mais informações sobre os condutos
E aqui está uma imagem de um Sistema de Plasma Secundário