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An isolated power converter topology is presented which uses an integrated passive power-sharing network for equal brightness levels in parallel LED branches. Analyses of discontinuous conduction mode (DCM) and continuous conduction mode (CCM) of converter operation have been performed. The DCM operation shows an improved performance and allows a reduced size of the required transformers compared...
This article presents a new Masterless Modular Current-Sharing (MMCS) technique. Current-sharing modules are identical and placed in a daisy chain configuration. Unlike classical current sharing which consists in comparing each phase current to a global computed average value, the presented masterless approach computes local current average values. Phase currents' balancing is achieved by comparing...
Rising energy intensity of production as well as the steady increase in energy prices are major factors which highlights the energy-saving problem. This paper presents middle power grid connected photovoltaic power supply system. Also in this paper proposed new circuit of dc-dc converter with small ripples of input current for which basic relations and modeling results are given.
This paper describes first the mathematical model of the Modular Multilevel Converter with n submodules based on differential equations. Secondly, by using this model the simulation block diagram in Simulink is presented. After that, the special output AC voltage control of this converter is analysed, considering the capacitors' voltage control loop that usually is included in this topology. The modulation...
Basic concepts and the potential to implement low voltage dc distribution systems in Albania are discussed. Aspects of development required for the use of power electronics equipment for low voltage dc systems are introduced. Our analysis shows that low voltage dc distribution systems have the potential to be used successfully in Albania.
Interconnection and Damping Assignment Passivity-Based Control of grid-connected PWM converters with LCL-filter is designed and analyzed. Dynamic performance, resonance damping and robustness against grid impedance variations are studied by simulation and show good results. Experimental tests on a 22 kW induction motor drive prove the simulation results.
Students of electrical engineering need to obtain practical abilities and skills from electric drives branch to acquire inside the theory better. Experience from last years shows that students have problems to understand basic physical principles of electric machines. The introduced modern educational facility should improve this adverse situation.
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