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Wyświetlanie 1-11 z 11
Tytuł:
Selected methods for improving operating conditionsof three-phase systems working in the presenceof current and voltage deformation – part II
Autorzy:
Pasko, M.
Buła, D.
Dębowski, K.
Grabowski, D.
Maciążek, M.
Powiązania:
https://bibliotekanauki.pl/articles/141598.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active power filters
compensation of higher harmonics
hybrid active power filters
power quality
symmetrisation
Opis:
The paper includes a summary of long-time research conducted by a research team in the Institute of Electrical Engineering and Computer Science at Silesian University of Technology. The research work has principally been related to selected problems in the field of analysis and synthesis of systems aimed at symmetrisation and improvement of some power quality parameters. This paper constitutes the second part of the report on the research. It has been devoted to three-phase system symmetrisation as well as effective elimination of higher harmonics and substantial improvement of power quality by means of hybrid active power filters.
Źródło:
Archives of Electrical Engineering; 2018, 67, 3; 603--616
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grid Voltages Sensorless Control of the PWM Rectifier with Active Filtering
Autorzy:
Wojciechowski, D.
Powiązania:
https://bibliotekanauki.pl/articles/262568.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
active filters
power quality
predictive control
estimation
techniques
Opis:
The paper presents structure and experimental results of the control system of the PWM rectifier with active filtering function. Proposed control system was designed for maximum filtering performance in steady state. This task is realized by predictive algorithms applied for both control as well as calculation of grid currents. Accuracy of these algorithms strongly depends on precise information about future samples of equivalent electromotive force of the grid, which is in general distorted and unbalanced. For this purpose, a novel estimator and predictor is proposed. The control of DC voltage is realized with application of variable gain PI controller. It ensures high dynamics in transient states and low gain for steady state oscillations of DC voltage. Proposed control system is AC voltages sensor less and has excellent active filtering performance, even at presence of grid voltage distortions.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 1; 35-43
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active power filters – optimization of sizing and placement
Autorzy:
Maciążek, M.
Grabowski, D.
Pasko, M.
Powiązania:
https://bibliotekanauki.pl/articles/200825.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power quality
active power filter
harmonics
optimization
Opis:
The significant problem of compensator placement and sizing in electrical networks has been analyzed in the paper. The compensation is usually realized by means of passive or active power filters. The former solution is widely used mainly because of the economical reasons, but the latter one becomes more and more popular as the number of nonlinear loads increases. Regardless of the compensator type the most important goal consists in voltage and current distortion drop below levels imposed by standards. Nevertheless, the desired effects should be achieved with the minimum cost. So far a few objective functions have been proposed for this optimization problem. It is claimed that minimization of the compensator currents leads also to the minimum costs. This paper shows that such simplified approach could lead to suboptimal solutions and in fact a function g(·) reflecting the relation between the compensator size and its price must be incorporated into objective functions. Moreover, in this case it is very easy to compare solutions obtained using compensators offered by different suppliers - it is enough to change the function g(·). Theoretical considerations have been illustrated by an example of active power filter allocation and sizing.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 847-853
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Harmonic compensation using the sliding DFT algorithm for three-phase active power filter
Autorzy:
Sozański, K. P.
Powiązania:
https://bibliotekanauki.pl/articles/262743.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
active filters
harmonics
DSP
power quality
power factor correction
Opis:
This paper describes the sliding discrete Fourier transform (DFT) algorithm as an alternative for typical DFT used for spectrum analysis and synthesis. As an example a control circuit for a three-phase 75 kVA parallel active power filter (APF) is used. Such filters have been built and tested. Some illustrative, experimental results are also presented in the paper. The control algorithms of the proposed APF are implemented in the fixed-point digital signal processor TMS320C50. The presented control APF algorithm is a good alternative to classical APF control algorithms, because it allows easy selection of control parameters in mains currents: imbalance, reactive power or harmonics contents. In the proposed circuit transient performance of APF is improved using non-causal predictive current compensation.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 2; 15-20
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control circuit for series active power filters based on programmable logic devices
Autorzy:
Supronowicz, H.
Olszewski, A.
Gawiński, H.
Powiązania:
https://bibliotekanauki.pl/articles/262739.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power electronics
active power filter
power quality
Opis:
This paper describes a control circuit for the active power filters working with three-phase AC power line. It describes logic circuitries as well as laboratory test results. The control circuit was realized with programmable logic devices, fast analog-to-digital and digital-to-analog converters. Proposed system working with open-loop control, it allows significantly simplifying its logic structure. Programmable logic devices do simultaneously a few independent tasks, so a control algorithm can be performing fast, improving considerably compensation dynamic. This paper includes results of laboratory tests of the active power filter consisted of proposed control circuit and a voltage-source converter.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 2; 21-25
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Near perfect reconstruction filter banks for power quality analysis
Autorzy:
Taskovski, D.
Koleva, L.
Milchevski, A.
Dimcev, V.
Powiązania:
https://bibliotekanauki.pl/articles/220392.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power quality
power harmonics
disturbance classification
quadrature mirror filters
Opis:
The wavelet transform has been successfully used in the area of power quality analysis. There are many published papers with methods for power quality disturbance classification or harmonics measurement, which use wavelet transform. However, the properties of the wavelet transform can drastically vary from the choice of the wavelet. In this paper we analyze the influence of the choice of the wavelet to the accuracy of the power quality classification method and to high frequency harmonics measurements. Additionally to the well known wavelet filters we introduce near perfect reconstruction filter banks. The simulation results indicate that these filter banks are a good choice for classification of power quality disturbances, especially in the presence of noise and for high frequency harmonics measurements.
Źródło:
Metrology and Measurement Systems; 2013, 20, 3; 359-370
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of a digital signal processor-controlled shunt active filter
Autorzy:
Limongi, L. R.
Cavalcanti, M. C.
Neves, F.
Azevedo, G. M.
Powiązania:
https://bibliotekanauki.pl/articles/262731.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
active filters
current control
power quality
Opis:
This paper presents the implementation of an active filter configuration for harmonic compensation. The system can be controlled for current harmonics and reactive power compensations simultaneously by using a converter operating as active shunt filter. A synchronous reference frame based controller is compared to an instantaneous reactive power based controller. The synchronous reference frame method is chosen to control the converter due to the better performance when the supply voltage is distorted. A shunt active filter system has been designed and built to meet IEEE 519 recommended harmonic standards. Simulation demonstrates the good performance of the active filter configuration. Experimental results, corresponding to the operation of the digital signal processor-controlled shunt active filter are also presented.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 2; 5-14
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wpływu filtru pojemnościowego na kształt napięcia w węźle zasilającym
Analysis of the influence of a capacitance filter on the voltage waveform distortion in a supply node
Autorzy:
Szymańska, A.
Powiązania:
https://bibliotekanauki.pl/articles/153345.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
jakość energii
filtry pojemnościowe
power quality
capacitance filters
Opis:
W celu zmniejszenia tętnień napięcia wyprostowanego stosowane są filtry pojemnościowe. W artykule przedstawiono wyniki analizy napięcia w węźle, z którego są zasilane: odbiornik przez prostownik z filtrem pojemnościowym oraz inne odbiorniki zasilane napięciem przemiennym. Przy wykorzystaniu autorskiego programu wyznaczono przebieg napięcia oraz jego widmo amplitudowe dla przyjętych wartości współczynnika tętnień. Dla wybranego okresu w stanie ustalonym przedstawiono zależność amplitud wybranych harmonicznych od pojemności filtru, wyznaczonej przez wymaganą wartość współczynnika tętnień.
A pulsatory voltage is generated at the rectifier output. Capacitance filters are often used in order to lower the voltage pulsation. There was determined the voltage amplitude change in time in the node from which a load is supplied through a rectifier with the capacitance filter (Fig. 1) [2]. The program written in the Matlab environment was used for it. For the selected voltage period in the steady state, there was determined the voltage amplitude spectrum for different values of the voltage pulsation factor at the rectifier output (Figs. 2 and 3). The developed program also allows calculating the timing of changes in the rectifier operating status. The analysed period of voltage changes in time was divided into subperiods corresponding to the consecutive cycles of charging and discharging the filter capacitor, during which the voltage in the supply node could be described by the equation (2) or (3). Using the equations (6) and (7), the amplitudes of each harmonic for the given circuit parameters were calculated and their dependence on the voltage pulsation factor at the rectifier output was determined (Figs. 5, 6, 7, 8). The presented equations and analysis results enable selecting the appropriate parameter values already at the stage of circuit design, so that the proper voltage quality is provided.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 12, 12; 1461-1463
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic and combinatorial algorithms for optimal sizing and placement of active power filters
Autorzy:
Maciążek, M.
Grabowski, D.
Pasko, M.
Powiązania:
https://bibliotekanauki.pl/articles/330809.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
power quality
optimization
active power filter
harmonics
genetic algorithm
combinatorial algorithm
jakość energii
energetyczny filtr aktywny
algorytm genetyczny
algorytm kombinatoryczny
Opis:
The paper deals with cost effective compensator placement and sizing. It becomes one of the most important problems in contemporary electrical networks, in which voltage and current waveform distortions increase year-by-year reaching or even exceeding limit values. The suppression of distortions could be carried out by means of three types of compensators, i.e., passive filters, active power filters and hybrid filters. So far, passive filters have been more popular mainly because of economic reasons, but active and hybrid filters have some advantages which should cause their wider application in the near future. Active power filter placement and sizing could be regarded as an optimization problem. A few objective functions have been proposed for this problem. In this paper we compare solutions obtained by means of combinatorial and genetic approaches. The theoretical discussion is followed by examples of active power filter placement and sizing.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 2; 269-279
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model częstotliwościowy metody detekcji wyższych harmonicznych wykorzystującej przekształcenie Parka
A frequency model of the harmonics detection method based on Park transformation
Autorzy:
Buła, D.
Pasko, M.
Powiązania:
https://bibliotekanauki.pl/articles/152216.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
energetyczne filtry aktywne
jakość energii
wyższe harmoniczne
active power filters
power quality
higher harmonics
Opis:
W artykule przedstawiono model w dziedzinie częstotliwości metody detekcji wyższych harmonicznych wykorzystującej przekształcenie Parka.Omawiana metoda jest stosowana w algorytmach sterowania trójfazowych energetycznych filtrów aktywnych. Algorytmy te realizowane są natomiast w dziedzinie czasu. Przedstawiony model pozwala na opracowanie modelu częstotliwościowego całego układu oraz ocenę wpływu parametrów układu na jego charakterystyki filtracyjne.
The model in the frequency domain of the harmonics detection method using Park transformation is presented in the paper. This method is usually used in control algorithms of three-phase active power filters which are implemented in the time domain. The presented model allows obtaining the active power filter model in frequency domain and assess the impact of system parameters on the characteristics of the filter. The study shows the model derivation of the base detection method (Fig. 1), but it can be applied to other similar methods for detection of selected harmonic components or its positive and negative components. The transformation of the derived model into symmetrical components (Fig. 3) allows determining the independent transmittance for positive and negative components. This enables obtaining the frequency responses of the analyzed systems (Fig. 4). For example, the model can be used to analyze the harmonic attenuation factor in a hybrid active power filter with a single tuned passive filter. Some examples of frequency responses are shown in Fig 5. In a similar way it is possible to analyze the filter stability or sensitivity in the frequency domain.
Źródło:
Pomiary Automatyka Kontrola; 2013, R. 59, nr 10, 10; 1109-1111
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania eksperymentalne prostownika osiemnastopulsowego o mocy 150 kVA z opcjonalnym szeregowym energetycznym filtrem aktywnym
Experimental tests of the 150 kVA 18-pulse diode rectifier with series active power filter
Autorzy:
Mysiak, P.
Śleszyński, W.
Cichowski, A.
Wyrzykowski, L.
Kolan, P.
Powiązania:
https://bibliotekanauki.pl/articles/268166.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
prostownik wielopulsowy szeregowy
energetyczne filtry aktywne
jakość energii elektrycznej
multi-pulse converters
active filters
power quality
Opis:
W artykule przedstawiono system sterowania oraz wybrane wyniki badań eksperymentalnych przekształtnika AC / DC składającego się z osiemnastopulsowego diodowego prostownika na bazie dławików sprzężonych i szeregowego energetycznego filtra aktywnego. Przebadano i porównano trzy konfiguracje przekształtnika o mocy 150kVA: (1) osiemnastopulsowy prostownik bez dodatkowych elementów, (2) prostownik z dodatkowym dławikiem sieciowym oraz (3) prostownik zintegrowany z szeregowym filtrem aktywnym. Zastosowana metoda sterowania filtrem aktywnym znacznie zmniejsza zniekształcenia harmoniczne oraz asymetrię prądów sieci, co jest szczególnie korzystne w przypadku niskich obciążeń i nieidealnego napięcia zasilającego.
The paper presents the control system and selected results of experimental tests of the ac/dc power converter consisting of 18-pulse diode rectifier on the basis of coupled reactors and a serial active power filter. Three configurations of the 150kVA converter were tested experimentally and compared: 18-pulse diode rectifier with and without additional grid reactor and the rectifier integrated with the active power filter. The highest current harmonic distortion and asymmetry exists for individual operation of the rectifier. Connecting a supplementary grid reactor to a rectifier significantly reduces harmonic distortion and unbalance of the grid current, especially in the nominal load conditions. The 18-pulse diode rectifier integrated with S-APF outperforms other configurations in grid current balancing and harmonic suppression, which is particularly advantageous at low loads and non-ideal supply voltage. The integrated system has additional features like dc voltage regulation, low susceptibility to supply asymmetry and load changes.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2016, 50; 67-70
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-11 z 11

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