A new variable speed constant voltage controller for self-excited induction generator

A new variable speed, constant voltage controller for self-excited inductio n generator (SEIG) is presented in this paper. The proposed PWM controller regulates the induction generator (IG) terminal voltage against varying rot or speed and changing load conditions. This scheme does not require any rea l time computations and information regarding rotor speed for calculating t he excitation current, thereby minimizing the electronic hardware and the c ost of the controller. A simple, over-current protection is incorporated to protect the inverter switches. Computer simulation and experimental result s show satisfactory operation of an induction generator with the proposed c ontrol scheme. (C) 2001 Elsevier Science B.V. All rights reserved.