This paper presents solution of optimal power flow (OPF) problem of electrical power system via a genetic algorithm of real type. The objective is to minimize the total fuel cost of generation and environmental pollution caused by fossil based thermal generating units and also maintain an acceptable system performance in terms of limits on generator real and reactive power outputs, bus voltages...

Understanding various aspects of ferroelectricity in hafnia-based nanomaterials is vital importance for the development future nonvolatile memory and logic devices. Here, unconventional weak electromechanical response epitaxial La0.67Sr0.33MnO3/Hf0.5Zr0.5O2/La0.67Sr0.33MnO3 ferroelectric capacitors investigated, via sensitivity offered by nanobeam X-ray diffraction experiments during applicatio...

<span lang="EN-US">A stand-alone self-excited wind energy conversion system (WECS) is considered commonly used in remote areas due to its simple control and low cost. This paper introduces the performance analysis of a reluctance generator (SERG) under balanced unbalanced operations. An asymmetrical component proposed obtain positive negative sequence components voltages currents addition...

In this paper, a Marx generator voltage multiplier as an impulse made of multi-stage resistors and capacitors to generate high is proposed. order pulse, number are connected in parallel charge up during on time then series higher off period. research, 6kV designed using gas discharge tube (GDT) electronic switch breakdown voltage. The circuit the storage capacitor for current applications. Acco...

Graphene film has been demonstrated as promising active materials for electric double layer capacitors (EDLCs), mainly due to its excellent mechanical flexibility and freestanding morphology. In this work, the distribution and variation pattern of electrolyte ions in graphene-film based EDLC electrodes are investigated with a 11B magic-angle spinning nuclear magnetic resonance (MAS-NMR) spectro...

This paper proposes a new simulation algorithm for analyzing large power distribution networks, modeled as linear RLC circuits, based on a novel partial random walk concept. The random walk simulation method has been shown to be an efficient way to solve for voltages of small number of nodes in a large power distribution network [2], but the algorithm becomes expensive to solve for voltages of ...

The paper introduces a novel design solution of reconnection-less reconfigurable filter based on the method unknown nodal voltages (MUNV). offers all standard 2nd-order transfer functions and electronic adjustment pole frequency quality factor, which are mutually independent. introduced brings following advantages in comparison to other relevant solutions (MUNV-based filters): a) it consists fo...

Purpose – The aim of this paper is to improve and adapt cascaded multilevel converters for electric vehicles (EVs) to have all the advantages of these converters and to eliminate its limitations in the use of EVs applications. Specifically, the purpose is to use only a single power source (battery pack, fuel cell, etc.) and generate a higher power-quality than regular multilevel converters. Des...

This thesis aims to bring clarity to the dimensioning aspects and limiting factors of the modular multilevel converter (MMC). Special consideration is given to the dc capacitors in the submodules as they are a driving factor for the size and weight of the converter. It is found that if the capacitor voltages are allowed to increase by 10% the stored energy must be 21 kJ/MW in order to compensat...

The instability of power systems comprising multiple LCL-filtered grid-connected dc–ac inverters connected in parallel can be caused by any individual inverter due to mutual coupling through the grid impedance. For stability analysis a multiparalleled system, an effective technique capable diagnose which particular (i.e., “trouble maker”) causes overall system has not been developed yet. In thi...