Consideration of a Self-Excitation Phenomenon of Three-Phase Induction Generator
three-phase induction generator
The accident that household electrical appliances in dozens of private houses failed happened several years ago. It seems to be caused by the abnormal voltage rise which resulted from a self-excitation phenomenon due to a condenser installed for power factor improvement of three-phase induction generators. In order to make this case clear, we considered theoretically and experimentally the outbreak of a self-excitation phenomenon of a condenser by using an experimental machine in this paper. The result made it clear that a self-excitation phenomenon was easily generated in single-phase alternating current load compared with in three-phase one. Therefore, it is possible to consider that the self-excitation is promoted by new electromotive force induced by the magnetic field for a component of negative-phase sequence.