Control of alternative energy hybrid system for residential and low power applications.

摘要

This work presents the design and simulation of a control strategy for the interconnection of a hybrid alternative energy system capable of regulating the load's voltage and controlling the power generation of the energy sources. The control strategy consists of controlling the power generated by each energy source, in a hierarchical form using sliding mode control, while taking in consideration factors that affect each power source and transform the power generated to suitable conditions for low power and residential applications. The hybrid alternative energy system is composed of photovoltaic cells, fuel cells and batteries. A mathematical equation to estimate the optimal voltage of photovoltaic systems for any solar irradiance and temperature conditions is proposed. Simulations of one or more systems interconnected to the load with the proposed control scheme, under different environmental and load conditions, are presented to show the efficacy of the method.