Analysis of a voltage regulator for self-excited induction generator employing current-type static compensator

This paper concerns the control of a self-exited induction generator (SEIG) by a sophisticated current-type static compensator (CT-STATCOM). The nature of self-excitation in a SEIG makes its output voltage very dependent on the amount of reactive power at the generator terminals. In the proposed scheme, a current-type converter (CTC) is employed to generate leading or lagging current at the SEIG terminals such that a regulated voltage is achieved. The rugged, short-circuit proof structure of a CTC makes it suitable for this application. Absence of three-phase output inductors and current control loop are other advantages of using CTC. Simulation results performed on a test machine shows the validity of analysis.