Abstract
This study deals with the development of a proportional-resonant (PR) control applied on voltage regulation and harmonics compensation of a standalone self-excited induction generator (SEIG) for micro-hydro power generation system. The generation system considers: (i) a three-phase induction generator (IG) as SEIG, (ii) which is driven by an unregulated micro-hydro turbine, (iii) a three-phase three-legs distribution static synchronous compensator (DSTATCOM) and (iv) linear and non-linear loads connected to the AC bus. The voltage regulation is performed through the injection of reactive power to the AC bus through the DSTATCOM, providing excitation current to the IG. It is considered the employment of PR control techniques, which offers suitable voltage regulation through voltage harmonics compensation in the point of common coupling. Furthermore, frequency regulation is performed on the demand side by an electronic load control connected to the DC bus of the DSTATCOM. Experimental results were obtained to demonstrate the good performance of the voltage and frequency regulation, provided by the control system during transients of linear and non-linear loads.
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