High‐Power Drive Systems for Industrial Applications: Practical Examples

The impacts of megawatt variable frequency drives (VFDs) for liquefied natural gas (LNG) plants are discussed in this chapter. Using electric VFDs to drive LNG plant compressors offers better performance, lower cost, and better work conditions than when using conventional gas turbine (GT) drives. This chapter presents few examples of actual high‐power VFDs that can realize up to 100 MW systems using four sets of 25 MW NPC‐based multilevel VSIs.The chapter starts with an overview of LNG plants, outlines conventional GT drives techno‐economic and environmental implications and introduces various electric drive technologies used for LNG plants, highlighting their limitations, technological problems and their impact on future LNG plants.