Performance Study of a Three-Phase SEIG Feeding Single-Phase Non-Linear Loads

The single-phase operation of a three-phase self-excited induction generator (SEIG) is an atypical way of generating single-phase power for remote off-grid areas in small scale, from renewable resources like: wind and hydro. The current paper focuses on the performance study on a hydro-driven 2.2 kW three-phase SEIG, that supplies single-phase non-linear resistive (R) loads. The single-phase operation of the generator is performed using a newly developed capacitor-based scheme. The result indicates that, at a fixed speed (1500 rpm) of the generator, the capacitor scheme can maintain the generator voltage and current balanced, supplying the single-phase non-linear loads. Further, it is observed that with the increasing non-linear load impedance, the generator voltage remains almost constant, while the stator current after decreasing almost tends to be constant. Finally, the SEIG voltage and current total harmonic distortion (THD) due to supply of non-linear loads, are observed which are found to be exceeding IEEE std. 519–2014.