Wyniki wyszukiwania - Biblioteka Nauki

1

Filtr aktywny UPQC sterowany sygnałem konduktancji zastępczej obciążenia

100%

Szromba A. , Sysło B.

Przegląd Elektrotechniczny

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2020

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tom R. 96, nr 3

33--36

PL

Zaproponowano nową metodę sterowania pracą szeregowo-równoległych filtrów aktywnych (ang.: Unified Power Quality Conditioner, UPQC). Wykorzystano ideę konduktancji zastępczej obciążenia według Fryzego. Oprócz standardowej funkcjonalności UPQC możliwa jest równoczesna regulacja przepływu energii zarówno między źródłem a grupą obciążeń podlegających kompensacji, a także wewnątrz tej grupy, gdy część obciążeń staje się generatorami energii. Dodatkową funkcją tak sterowanego UPQC może być zasilanie obciążenia DC z kondensatora sprzęgającego jego przekształtniki, czyniąc z niego równocześnie prostownik PFC. I odwrotnie, pobierając energię z zewnętrznego źródła energii DC filtr UPQC może zasilać kompensowane obciążenia AC. Z tego powodu omawiany filtr UPQC może być użyty do zbudowania lokalnego centrum dystrybucji energii, na przykład w systemach zawierających mikroźródła OZE.

EN

The article proposes a new method of controlling the operation of Unified Power Quality Conditioner (UPQC). The idea of Fryze’s load equivalent conductance was used. Applying this method it is possible performing the classical tasks of UPQC filter and, concurrently, regulating the energy flow both between the source and the group of loads being compensated, as well as within this group when some loads become generators. An additional UPQC function may be supplying DC load via the DC-link capacitor coupling the both UPQC’s converters. In such a case the UPQC plays also as a PFC rectifier. Conversely, by drawing energy from an external DC energy source the UPQC can supply the AC-side loads. For this reason, the UPQC can be used to create a local energy distribution center, for example for systems containing renewable micro-sources.

2

Model predictive control of four-leg three-level flying capacitor converter: influence of model parameter mismatch

71%

Antoniewicz K. , Rafal K. , Jasinski M.

Power Electronics and Drives

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2018

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tom Vol. 3 (38), No. 1

1--9

EN

This paper presents a control method for a four-leg three-level flying capacitor converter (FCC) operating as a shunt active power filter (SAPF), based on model predictive control with finite number of control states (FS-MPC). Current control and capacitor voltage balancing are described. Influence of the mismatch of the inductive filter model parameters on the current control precision is analysed. Results are supported by the experimental waveforms obtained with a 10kVA set-up.

3

Performance Measure of Shunt Active Power Filter Applied with Intelligent Control Technique

67%

Agrawal S. , Chourasiya S. , Palwalia D. K.

Journal of Power Technologies

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2020

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tom Vol. 100, nr 3

272--278

EN

This paper describes a shunt active power filter for compensating harmonic currents and reactive power. The shunt active power filter (SAPF) was implemented with a phase pulse modulated current control voltage source inverter. The proposed system is based on PLL synchronization with reduced fuzzy logic controller (RD-FLC). These control techniques for SAPF prove that source current is sinusoidal even when load is nonlinear. The CC-VSI inverter switching is done according to gating pulse obtained from the hysteresis controller using RD-FLC controller. The proposed system is investigated using simulation results. The effectiveness of the controller is observedin the form of total harmonic distortion, reactive power compensation and settling time of dc link voltage under non linearload condition. This technology reduced the rules of fuzzy logic controller from 49 to 37.

4

Comparative analysis of Solar Generation System with 21- CHB-MLI integrated SAPF based ANN and AGPSO tuned PI controller to enhance power quality

67%

Agrawal S. , Kumar M. , Palwalia D. K.

Journal of Power Technologies

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2022

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tom Vol. 102, nr 4

121--131

EN

This paper represents comparative analysis of artificial neural network (ANN) and AGPSO tuned PI controller based power quality improvement solar generation system. Now a day's Power quality is a major problem due to non-liner load based on power electronics. SAPF is solution to overcome such power quality issues in dynamic manner. With the use of both soft computing controllers based Shunt active power filter, it is tried to reduce harmonics (distortions), compensate reactive power, enhance power quality and power factor correction of supply voltage. System comprises 21-Level cascaded H-bridge inverter supplied from photovoltaic panel, series coupling inductor and self supported DC (capacitor) bus. Voltage harmonics of supplied voltage from PV is reduced by 21-level cascades H-bridge inverter in which switching signal is generated by carrier based in phase level shifted pulse width modulation technique. Incremental conductance (IC) MPPT technique is incorporated to maximize PV panel output. Phase locked loop based unit template generation and Levenberg Marquardt algorithm trained ANN and AGPSO tuned PI controller based DC bus voltage regulation is utilized for current quality improvement in SAPF. Comparative results show the effectiveness of ANN controller than A GPSO tuned PI controller. Suggested model is simulated in Matlab/Simulink 2016(b) for effectiveness.

5

PQ & DQ based shunt active power filter with PWM & hysteresis techniques

59%

Alkhayyat M. T. , Suliman M. Y. , Aiwa F. F.

Przegląd Elektrotechniczny

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2021

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tom R. 97, nr 9

78--84

EN

Power quality is mainly affected by any deviation in voltage, current, or frequency that results in damage, upset, or failure of end-use equipment. Non-linear loads like power electronics devices are the main causes of power quality problems. In this paper, we performed a comparison between DQ and PQ theory to control the shunt active power filter by using hysteresis and PWM techniques at different non-linear loads (controlled and uncontrolled rectifiers) in terms of the amount of improvement in the THD, power quality, and switching losses. The MATLAB / Simulink was used as a simulation tool to obtain a result for this paper.

PL

Na jakość energii wpływają głównie wszelkie odchylenia napięcia, prądu lub częstotliwości, które powodują uszkodzenie, niesprawność lub awarię sprzętu końcowego. Obciążenia nieliniowe, takie jak urządzenia energoelektroniczne, są głównymi przyczynami problemów z jakością energii. W artykule porównaliśmy teorię DQ i PQ w celu sterowania bocznikowym filtrem mocy czynnej za pomocą technik histerezy i PWM przy różnych obciążeniach nieliniowych (prostowniki sterowane i niesterowane) pod względem stopnia poprawy THD, jakości napięcia i strat przełączania. MATLAB / Simulink został wykorzystany jako narzędzie symulacyjne do uzyskania wyniku dla tego artykułu.

6

Genetic algorithm optimization of a SAPF based on the fuzzy- DPC concept

59%

Dahmani S. , Semmah A. , Kadem M. , Wira P.

Przegląd Elektrotechniczny

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2019

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tom R. 95, nr 7

60--65

EN

This article presents a study on the use of the concept of direct power control (DPC) based on intelligent techniques in the control of a shunt active power filter (SAPF). In order to improve harmonic mitigation and reactive power compensation capabilities, the conventional switching table is replaced by a fuzzy inference system to generate the switching sequences of the shunt active power filter. To ensure an active power exchange stable and efficient, the DC voltage of the SAPF in controlled using an integrated proportional controller (PI) optimized by a heuristic optimization technique based on genetic algorithms (GA). The combination of two intelligent techniques in this proposed control strategy makes it possible to reduce ripples in different variables of the SAPF, to maintain the direct voltage at their reference value and to improve the THD of the grid current. The numerical simulation results obtained under Matlab / Simulink confirm the importance of the SAPF's proposed control technique

PL

W artykule opisano wykorzystanie metody DPC (direct power control) do poprawy parametrów bocznikowego filtru aktywnego SAPF. Konwencjonalna tabela przełączeń jest zastąpiona przez system logiki rozmytej. Do optymalizacji filtru wykorzystano też algorytm genetyczny.

7

A simplified model predictive control for shunt active power filter using modified instantaneous power theory under polluted grid conditions

48%

Bouchikha H. , Mesbahi N. , Heguig L. , Ouari A.

Journal of Power Technologies

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2022

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tom Vol. 102, nr 1

14--24

EN

This paper proposes a simplified finite control set model predictive control (FCS-MPC) strategy for a three-phase shunt active power filter (SAPF), which is based on a vector operation technique (VOT). In the conventional FCS-MPC, the optimal switching state is selected based on the evaluation and minimization of a cost function for all possible voltage vectors of the voltage source inverter (eight different vectors). The proposed FCS-MPC performs like a conventional FCS-MPC where the selection and evaluation of the possible voltage vectors are reduced by half (four vectors). The reduction in the computational burden is evident. In this study, the modified version of the instantaneous power theory based on a high selectivity filter is used to extract reference current components which increase the selectivity and the dynamic performance of SAPF. Simulation results demonstrate the effectiveness and reliability of the SAPF with the proposed control strategy under polluted grid conditions.