Abstract Refrigeration turbo compressors in modern LNG liquefaction plants are traditionally driven by industrial heavy duty gas turbines. With an ongoing industry trend towards larger train sizes, and more emphasis placed on higher energy efficiency and lower greenhouse gas (GHG) emissions, the use of very large electric motors to drive the compressors becomes of increasing interest and the first "all electric driven" LNG plant will soon go into operation in Norway. Economic and operational advantages of this alternate drive concept are discussed for the owners & operators of LNG liquefaction plants, a typical comparison study of the two alternatives is shown, and some details of the electrical drive technology employed are presented. Introduction
