Abstract

This study mainly develops a novel power control scheme for a stand-alone photovoltaic (PV) generation system. In order to make the PV generation system more flexibility and expandability, the later power circuit is composed of a high step-up converter and a pulse-width-modulation (PWM) inverter. In the dc-dc power conversion, the high step-up converter is introduced to improve the conversion efficiency in conventional boost converters and to allow the parallel operation of low-voltage PV modules. Moreover, an adaptive total sliding-mode control (ATSMC) system is designed for the voltage control of the PWM inverter to maintain a sinusoidal output voltage with lower total harmonic distortion (THD) and less variation under various output loads. Experimental results are given to verify the validity and reliability of the high step-up converter and the PWM inverter control for a stand-alone PV generation system.

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