Cogeneration Application of Induction Generators

An induction generator an induction motor which is driven above its synchronous speed byasuitable prime mover and is provided with source sufficient reactive power for excitation. The simplicity, reliability, and low cost of the induction generator makeit well suited for many Industrial cogeneration applications. A brief review is presented of the basic theory ofinduction generators with a discussion of the major differences between induction and synchronous generators. The application of a 3000-kW induction generatoris compared to that of a comparably sized synchronous machine in a typical cogeneration scheme. The comparison focuses on relative costs, equipment, protective relaying, utility tie-in and synchronizing, maintenance, and operating procedures.