A method of development of a simulation complex for creating the simulation computer models of wind-diesel power plants (WDPPs) and results of such modeling are considered. The main types of the ...applied mathematical models are described: analytical approximation of the rated characteristics, reproduction of the transient processes in the equivalent circuits on the basis of integration of the differential equations, and harmonic analysis and playout of the values of the random variables during the statistical computational experiments. The simulation computer models allow carrying out investigations and analysis of the static and dynamic operation modes of the WDPPs and can be used when carrying out engineering solutions in designing energy-efficient local power-supply systems with WDPPs.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OBVAL, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
This article presents the optimization of the subsystem for measuring the input, internal and output voltages of an electrical energy converter for electric drive systems. A comparison of the ...topology of an electrical energy converter for electric drive systems using classic single-channel voltage sensors and typology using optimized multi-channel voltage sensors is given. Comparison of topologies shows the technical and economic efficiency and feasibility of the proposed optimization. Technical efficiency is a reduction in the number of functional blocks with a total number of interconnections, which in turn reduces the requirement for a control system of an electrical energy converter. Economic efficiency is a reduction in the cost of materials used for the production of an electric power converter, as well as the cost of its assembly.
The increasing in numbers of electric vehicle could lead to significant consequences for the stability and reliability of the distributed network. Because of this reason in the current paper a new ...control strategy for charging electric vehicles in micro and nanogrid is proposed. Finding optimal solution for maximal energy storage and usage of redundant energy from EVs in micro and nanogrid is the main reason for this research. A mathematical model is developed and realized in MATLAB.
The paper concerns modeling of significant parameters of an electric power converter. All they are presented in two- and three-dimensional graphs in order dependences to be viewed in a proper way. An ...original approach and its software implementation, both based on index matrixes and developed by the authors, are used for generation of voltage and amperage sequences.
Published work on the development of series hybrid electric vehicles (SHEVs) has always been directed towards volume and weight reduction for traction batteries and the electric drives with little ...attention into the generator-sets. This paper presents an overview as well as a comparison of conventional and unconventional power factor (PF) correction techniques applied to generator-sets operating in series hybrid electric vehicles (SHEV). The aim is to determine which rectifier topology demonstrates both: high PF, high output voltage and high efficiencies. Conventional PF correction techniques such as PWM operated rectifiers run at high switching frequencies, resulting in high switching losses. Controlled series compensator (CSC) rectifiers, which have been used in power transmission lines to improve the power factor, operate at much lower switching frequency, compared to conventional PWM controlled rectifiers, promising a reduction in switching losses, without PF degradation. The CSC rectifiers are less known in automotive and therefore here regarded as unconventional. The operation and performance of various topologies for both conventional and unconventional PF correction techniques for SHEVs is discussed and simulated using Matlab/Simulink. Simulation results in terms of the first harmonic of the phase current, total harmonic current distortion (THD), PF, output voltage and efficiency is provided. It is concluded that the switched variable capacitor (SVC) circuit is the most promising PF correction circuit for generators operating constant speed.
