Wyniki 1-2 spośród 2 dla zapytania: authorDesc:"Jakson P. BONALDO"

Multifunctional Current Reference Generation Strategy for Grid-tied Power Electronic Converter DOI:10.15199/48.2015.03.34

Czytaj za darmo! »

In this work the functionalities of Power Electronic Converters (PEC) used as grid interface device for distributed generation sources are extended to deal with Power Quality (PQ) issues. It is proposed an alternative strategy to obtain current references based on the Conservative Power Theory (CPT). The proposed strategy contributes to the full exploitation of the PEC power capacity, allowing the PEC to act as a multifunctional device performing simultaneously selective compensation of PQ issues and power injection into the utility grid. Streszczenie. Elektroniczny konwerter mocy PEC używany jako interfejs rozproszonych źródeł energii został poszerzony o możliwości poprawy jakości energii. Prądowe źródło odniesienia bazuje na Teorii Zachowania Mocy CPT. Wielofunkcyjne prądowe źródło odniesienia do sieciowego konwertera mocy. Keywords: multifunctional power converter, power quality, renewable power sources, selective compensation. Słowa kluczowe: konwerter mocy, rozproszone systemy zasilania, jakośc energii. Introduction Nowadays, power electronic converters (PEC) used as power electronic interface (PEI) between the grid utility and the renewable energy sources (RES) are experiencing an increasing evolution in terms of their functionalities. In addition to the current injection into the grid, these converters are also being used to improve the power quality at point of common coupling (PCC) [1-3]. Usually, it is desired the injection of full power available from the RES into the grid. If the RES´s power is less than the converter power rating the remaining available power may be used to compensate for power quality disturbances, like harmonics pollution and reactive power [4-7]. Fig. 1 shows a structure commonly used to inject small amounts of active power into the grid, which is largely used with solar cells [8, 9]. This system could also be adapted to perform power quality (PQ) tasks by acting as an active power filter (APF). Th[...]

Design, simulation and comparative evaluation of both a classic and a fuzzy logic PI controller applied to a DC-DC converter DOI:10.15199/48.2018.05.05

Czytaj za darmo! »

This paper presents the design, simulation and comparative evaluation of both a classic proportional-integral (PI) controller and a fuzzy logic PI controller applied to the output voltage control of a DC-DC buck converter. The performance comparison was done in terms of overshoot and settling time simulated in Matlab-Simulink. Results demonstrated that the fuzzy logic PI controller has a superior performance compared to the classic PI controller, furthermore the design becomes simpler, since it is not necessary to find the mathematical model of the system to be controlled. Streszczenie: W pracy przedstawiono projektowanie i badania symulacyjne układów sterowania przekształtnika DC-DC opartych na klasycznym regulatorze typu PI i regulatorze PI, zrealizowanym z wykorzystaniem logiki rozmytej. Zarówno projektowanie jak i badania symulacyjne zostały przeprowadzone przy użyciu programu Matlab - Simulink. Uzyskane wyniki wskazuję na lepsze właściwości układu sterowania zrealizowanego w logice rozmytej. Projektowanie, symulacja i badania porównawcze właściwości układów sterowania z klasycznym regulatorem typu PI i regulatorem PI zrealizowanym z wykorzystaniem logiki rozmytej Keywords: fuzzy controller, buck converter, PI controller. Słowa kluczowe: regulator PI, logika rozmyta, przekształtnik DC-DC obniżający napięcie - typu buck. Introduction The proportional integral differential (PID) controller is widely used in industry due to its simple structure, easy implementation and low cost [1]. In the 40s, advances of analysis and modelling techniques in frequency domain allowed engineers to develop closed loop linear systems meeting desired performance requirements. Thereafter, in the following decades PID controllers started being used to control processes of physical quantities such as temperature, pressure among others [1]. On the other hand, fuzzy logic controllers (FLC) succeed well in solving problems where traditional mathematical mode[...]

 Strona 1