Abstract
This paper presents a concept design of a hybrid renewable energy system (HRES). The proposed HRES design specifies the operation of the following units: a pumped-storage hydro power plant, a wind power plant and a solar power plant. Since the pumped-storage hydro power plant represents the most complex entity of the HRES, special emphasis is placed on its two control loops: the water tank level control loop and the load-depended frequency control loop. Models of these control loops provide the means for efficient controller design and implementation. In order to achieve effective energy distribution and reliable power supply of the consumers, a switch logic architecture has been developed. Since the HRES's final energy production highly depends on the process of energy conversion, the performances of three types of power converters are analysed. This includes the parametrisation, modelling and simulation of such converters. Finally, a graphical user interface (GUI) for purposes of data monitoring, control and supervision within the designed SCADA system, is presented. The proposed HRES design represents the foundation of the system implementation that aims at serving as a platform for research, education and a broad range of projects on renewable energy.
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