Control of a Dual Input Converter for PV-Wind Hybrid Sources Using a Storage System

摘要

The hybridization of green energy resources offers better reliability and feasibility for power generation systems. For incorporating several sources, an appropriate power electronic device and a power control strategy are required. In this paper, an integrated double input single output (DI -SO) DC-DC converter is proposed. This converter interfaces two different sources, wind power and solar-PV to supply a DC load. Hybrid system components of this micro-grid share the energy on a common DC-link bus where a storage system is installed to compensate for the gap between the power of the sources and the load. Thus to make well-regulated output DC voltage from the dual input power conditioner, implementation of a Smart Fuzzy Controller for this converter is proposed. Firstly, voltage and power control laws based on the classical proportional-integral PI controllers have been presented. Nevertheless, a self-adaptation capability of this kind of controllers is limited; thus, the strategy control has been improved by introducing a PI Fuzzy Logic Controller (FLC) which provides a fast and a precise regulation. Therefore, the suggested regulator is then designed to improve the stability of the DC link voltage. Finally, to test the effectiveness of the adopted controller, simulation results for variable wind speeds and different solar irradiation levels are presented, compared and discussed.