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The exponential increase of electric energy demand, in parallel with the forthcoming exploration of Distributed Energy Resources (DER), as Renewable Energy Resources (RES), makes the future electric network more and more complex, therefore it is required the implementation of active distribution networks, with rapid control decisions counter to the passive or conventional power network. This paper...
Using multilevel inverters in fuel cell & solar cell & wind turbines is increasing. Harmonic reduction techniques in multilevel inverters are considered. Mathematical methods for reducing the harmonic are presented in some of the literatures Mathematical methods are not suitable for high level inverters. These methods analyze harmonics with constant output voltage of each inverter.
A hybrid green micro-cogeneration energy system is studied for village electricity using a large permanent-magnet DC motor. This scheme is introduced in compliance with the current trend of environment-friendly hybrid power generation. Wind energy, solar energy and fuel cells are all potential renewable green sources of energy. The hybrid scheme comprises those three sources of energy in the form...
The Hydrogen Research Institute developed a hybrid renewable energy power system that uses a wind turbine, a photovoltaic array and a fuel cell. In order to connect this system to the grid, an islanding protection device is being developed. This paper presents the passive (U/O Voltage, U/O Frequency) and active (Sandia frequency shift and Sandia voltage shift) protection methods that were chosen to...
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