Analysis of the Self-Regulated Self-Excited Single-Phase Induction Generator

Abstract

We proposed in a previous paper a new self-excited single-phase induction generator with a self-regulating feature, and clarified its operating principles and basic characteristics by experiment. This generator consists of a three-phase squirrel-cage induction machine Yconnected with three capacitors, and one of these capacitors is connected with a single-phase load. Thus, the system configuration of the generation set is very simple, and by selecting the values of the three capacitors properly, this system exhibits a better voltage regulation.
This paper introduces a method for predicting the steady-state performance of the generator. In the analysis, the method of symmetrical coordinates is used to derive an equivalent circuit of the generator. A computational procedure and a mathematical model for predicting the steady-state performance are also shown. Calculated results are compared with the experimentally obtained values on a laboratory machine, and a reasonable correlation is observed. The proposed analysis is useful for simulating the steady-state performance of the generator by taking into account the nonlinear effect of the iron core due to magnetic saturation.