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Wyszukujesz frazę "FACTS" wg kryterium: Temat


Tytuł:
Power flow analysis and control of distributed FACTS devices in power system
Autorzy:
Anand, V.
Mallik, S. K.
Powiązania:
https://bibliotekanauki.pl/articles/141190.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
D-FACTS
UPFC
power flow control
stability
THD
FACTS
Opis:
The deployment of a distributed power-flow controller (DPFC) in a single- machine infinite-bus power system with two parallel transmission lines are considered for the analysis in this paper. This paper presents the network analysis of the DPFC for power flow control. The performance is evaluated on a given test system with a single line-to- ground fault. The improvement in the stability as well as power quality is evident from the results. Thus the DPFC has the ability to enhance the stability and power quality of the system.
Źródło:
Archives of Electrical Engineering; 2018, 67, 3; 545--561
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-type FACTS placement for loss minimization using biogeography based optimization
Autorzy:
Subramanian, A.
Ravi, G.
Powiązania:
https://bibliotekanauki.pl/articles/140825.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biogeography based optimization
FACTS devices
Opis:
This paper presents a new strategy for optimal placement of multi-type FACTS devices with a view to minimize losses besides enhancing the voltage profile using biogeography based optimization. The strategy places three types of FACTS devices that include static VAR compensator, thyristor controlled series compensator and unified power flow controller; and offers optimal locations for placement, type and parameters of the FACTS devices. Test results on IEEE 14, 30 and 57 bus systems reveal the superiority of the algorithm.
Źródło:
Archives of Electrical Engineering; 2012, 61, 4; 517-531
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Greeks under the Pyramids, or a Princess in a Brothel
Autorzy:
Lukaszewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/702826.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
GREEK HISTORIOGRAPHY
PYRAMIDS -FACTS & MYTHS
Opis:
The article is devoted to facts and myths about the pyramids, their origin and the way in which they were built, as related by Herodotus, Strabo, Diodorus and Pliny the Elder.
Źródło:
Meander; 2005, 60, 3; 338-349
0025-6285
Pojawia się w:
Meander
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study of GA & DE algorithm for the economic operation of a power system using FACTS devices
Autorzy:
Bhattacharyya, B.
Gupta, V. K.
Kumar, S.
Powiązania:
https://bibliotekanauki.pl/articles/141459.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FACTS devices
line power flow
FACTS devices & its optimal locations
genetic algorithm
differential evolution technique
Opis:
The problem of improving the voltage profile and reducing power loss in electrical networks must be solved in an optimal manner. This paper deals with comparative study of Genetic Algorithm (GA) and Differential Evolution (DE) based algorithm for the optimal allocation of multiple FACTS (Flexible AC Transmission System) devices in an interconnected power system for the economic operation as well as to enhance loadability of lines. Proper placement of FACTS devices like Static VAr Compensator (SVC), Thyristor Controlled Switched Capacitor (TCSC) and controlling reactive generations of the generators and transformer tap settings simultaneously improves the system performance greatly using the proposed approach. These GA & DE based methods are applied on standard IEEE 30 bus system. The system is reactively loaded starting from base to 200% of base load. FACTS devices are installed in the different locations of the power system and system performance is observed with and without FACTS devices. First, the locations, where the FACTS devices to be placed is determined by calculating active and reactive power flows in the lines. GA and DE based algorithm is then applied to find the amount of magnitudes of the FACTS devices. Finally the comparison between these two techniques for the placement of FACTS devices are presented.
Źródło:
Archives of Electrical Engineering; 2013, 62, 4; 541-552
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal LQR controller in CSC based STATCOM using GA and PSO
Autorzy:
Gupta, S.
Tripathi, R. K.
Powiązania:
https://bibliotekanauki.pl/articles/140927.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CSC
FACTS
AI techniques
LQR
STATCOM
Opis:
The static synchronous compensator (STATCOM) is the multipurpose FACTS device with the multiple input and multiple output system for the enhancement of its dynamic performance in power system. Based on artificial intelligence (AI) optimization technique, a novel controller is proposed for CSC based STATCOM. In this paper, the CSC based STATCOM is controlled by the LQR. But the best constant values for LQR controller's parameters are obtained laboriously through trial and error method, although time consuming. So the goal of this paper is to investigate the ability of AI techniques such as genetic algorithm (GA) and particle swarm optimization (PSO) methods to search the best values of LQR controller's parameters in a very short time with the desired criterion for the test system. Performances of the GA, PSO & ABC based LQR controllers are also compared. Applicability of the proposed scheme is demonstrated through simulation in MATLAB and the simulation results are shown an improvement in the input-output response of CSC-STATCOM.
Źródło:
Archives of Electrical Engineering; 2014, 63, 3; 469-487
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wittgenstein’s inspirations. On the earlier philosophy of Professor Bogusław Wolniewicz
W kręgu wpływów ideowych Ludwiga Wittgensteina. O wcześniejszej filozofii Profesora Bogusława Wolniewicza
Autorzy:
Stuchliński, Józef Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2097142.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
facts
things
ontology
hypostases
fakty
rzeczy
ontologia
hipostazy
Opis:
Wczesne stanowisko filozoficzne Profesora Bogusława Wolniewicza nawiązywało do poglądów nazywanych pierwszą filozofią Ludwiga Wittgensteina, wyrażoną w Traktacie logiczno-filozoficznym. Znalazło to swój wyraz najpierw w książce Rzeczy i fakty. Wstęp do pierwszej filozofii Wittgensteina (1968), a ostatecznie w monografii Ontologia sytuacji. Podstawy i zastosowania (1985). W obu przypadkach, poglądy filozoficzne Profesora Wolniewicza były wyrażane w znacznej mierze w ujęciu uprzedmiotowiającym pojęcia semiotyczne i logiczne (hipostazy), co też, w obu przypadkach, wydawało mi się wątpliwe. Ontologia sytuacji może być owocnie traktowana jako ogólna formalna teoria semantycznych korelatów właściwych dla wypowiedzi zdaniowych.
Źródło:
Przegląd Filozoficzny. Nowa Seria; 2018, 3; 189-197
1230-1493
Pojawia się w:
Przegląd Filozoficzny. Nowa Seria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FACTS location and size for reactive power system compensation through the multi-objective optimization
Autorzy:
Belazzoug, M.
Boudour, M.
Sebaa, K.
Powiązania:
https://bibliotekanauki.pl/articles/229744.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reactive dispatch
multi-objective optimization
NSGA-II
SVC
TCSC
FACTS
Opis:
The problem of the FACTS (Flexible Alternative Current Transmission System Devices) location and size for reactive power system compensation through the multi-objective optimization is presented in this paper. A new technique is proposed for the optimal setting, dimension and design of two kinds of FACTS namely: Static Volt Ampere reactive (VAR) Compensator (SVC) and Thyristor Controlled Series Compensator (TCSC) handling the minimization of transmission losses in electrical network. Using the proposed scheme, the type, the location and the rating of FACTS devices are optimized simultaneously. The problem to solve is multi criteria under constraints related to the load flow equations, the voltages, the transformer turn ratios, the active and reactive productions and the compensation devices. Its solution requires the the advanced algorithms to be applied. Thus, we propose an approach based on the evolutionary algorithms (EA) to solve multi-criterion problem. It is similar to the NSGA-II method (Ellitist Non Dominated Sorting Genetic Algorithm). The Pareto front is obtained for continuous, discrete and multiple of five MVArs (Mega Volt Ampere reactive) of compensator devices for the IEEE 57-bus test system (IEEE bus test is a standard network).
Źródło:
Archives of Control Sciences; 2010, 20, 4; 473-489
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
WAMS - based control of series FACTS devices installed in tie-lines of interconnected power system
Autorzy:
Nogal, Ł.
Machowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/141396.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
system elektroenergetyczny
stabilność
FACTS
WAMS
power system control
transient stability
Opis:
This paper addresses the state-variable stabilising control of the power system using such series FACTS devices as TCPAR installed in the tie-line connecting control areas in an interconnected power system. This stabilising control is activated in the transient state and is supplementary with respect to the main steady-state control designed for power flow regulation. Stabilising control laws, proposed in this paper, have been derived for a linear multi-machine system model using direct Lyapunov method with the aim to maximise the rate of energy dissipation during power swings and therefore maximisation their damping. The proposed control strategy is executed by a multi-loop controller with frequency deviations in all control areas used as the input signals. Validity of the proposed state-variable control has been confirmed by modal analysis and by computer simulation for a multi-machine test system.
Źródło:
Archives of Electrical Engineering; 2010, 59, 3-4; 121-140
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sterowanie szeregowych urządzeń FACTS za pomocą sygnałów WAMS
Control of series FACTS devices using WAMS signals
Autorzy:
Nogal, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/172956.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
system elektroenergetyczny
stabilność systemu
FACTS
WAMS
electric power system
system stability
Opis:
W pracy przedstawiono możliwość zastosowania sygnałów uzyskanych za pomocą WAMS (wide area monitoring system) do sterowania urządzeniami FACTS (flexible alternating current transmission system), w celu poprawy stabilności systemu elektroenergetycznego (SEE). Algorytm sterowania urządzeniami FACTS, zaproponowany w tej pracy, uwzględnia zmienne stanu ze wszystkich podsystemów. Algorytm ten został wyprowadzony przy wykorzystaniu bezpośredniej metody Lapunowa, dla liniowego wielomaszynowego modelu SEE. W celu udowodnienia skuteczności działania proponowanego algorytmu oraz słuszności założonej tezy stworzono modele matematyczne połączonych systemów elektroenergetycznych z uwzględnieniem szeregowych urządzeń FACTS w liniach wymiany międzysystemowej. Uzyskane wyniki symulacyjne oraz analiza modalna potwierdziły, iż zaproponowany algorytm w znaczącym stopniu przyczynia się do szybkiego wytłumienia kołysań mocy, w połączonym SEE, po wystąpieniu zakłócenia, jednocześnie przyczyniając się do zmniejszenia oscylacji częstotliwości. Dzięki zastosowaniu proponowanego algorytmu, można uzyskać poprawę stabilności systemu elektroenergetycznego, poprzez zmniejszenie kołysań wirników generatorów synchronicznych.
This paper presents the possibility of application of wide area measurements systems (WAMS) to stability enhancing control of FACTS devices installed in tie-lines of interconnected power system. The created algorithm of the control of FACTS devices with system stabilizer takes into consideration frequencies from all subsystems. The proposed algorithm of the control has been obtained from direct Lyapunov method, for linear multi-machine power system model. Mathematical models of interconnected power systems with the use of series FACTS in tie-lines have been created in order to provide efficiency of the proposed algorithm and correctness of the assumed thesis. Obtained simulation results and the modal analysis confirmed that the proposed algorithm is contributing to quick damping swings in power system after disturbance, at the same time contributing to reducing oscillation of the frequency. Thanks to proposed algorithm it is possible to obtain the improvement in stability of the power system.
Źródło:
Archiwum Energetyki; 2011, 41, 2; 31-58
0066-684X
Pojawia się w:
Archiwum Energetyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power system oscillation damping controller design: a novel approach of integrated HHO-PSO algorithm
Autorzy:
Devarapalli, Ramesh
Kumar, Vikash
Powiązania:
https://bibliotekanauki.pl/articles/1845539.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Harris hawk optimization
power system stabilizers
STATCOM
FACTS
particle swarm optimization
Opis:
The hybridization of a recently suggested Harris hawk’s optimizer (HHO) with the traditional particle swarm optimization (PSO) has been proposed in this paper. The velocity function update in each iteration of the PSO technique has been adopted to avoid being trapped into local search space with HHO. The performance of the proposed Integrated HHO-PSO (IHHOPSO) is evaluated using 23 benchmark functions and compared with the novel algorithms and hybrid versions of the neighbouring standard algorithms. Statistical analysis with the proposed algorithm is presented, and the effectiveness is shown in the comparison of grey wolf optimization (GWO), Harris hawks optimizer (HHO), barnacles matting optimization (BMO) and hybrid GWO-PSO algorithms. The comparison in convergence characters with the considered set of optimization methods also presented along with the boxplot. The proposed algorithm is further validated via an emerging engineering case study of controller parameter tuning of power system stability enhancement problem. The considered case study tunes the parameters of STATCOM and power system stabilizers (PSS) connected in a sample power network with the proposed IHHOPSO algorithm. A multi-objective function has been considered and different operating conditions has been investigated in this papers which recommends proposed algorithm in an effective damping of power network oscillations.
Źródło:
Archives of Control Sciences; 2021, 31, 3; 553-591
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power system oscillation damping controller design: a novel approach of integrated HHO-PSO algorithm
Autorzy:
Devarapalli, Ramesh
Kumar, Vikash
Powiązania:
https://bibliotekanauki.pl/articles/1845528.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Harris hawk optimization
power system stabilizers
STATCOM
FACTS
particle swarm optimization
Opis:
The hybridization of a recently suggested Harris hawk’s optimizer (HHO) with the traditional particle swarm optimization (PSO) has been proposed in this paper. The velocity function update in each iteration of the PSO technique has been adopted to avoid being trapped into local search space with HHO. The performance of the proposed Integrated HHO-PSO (IHHOPSO) is evaluated using 23 benchmark functions and compared with the novel algorithms and hybrid versions of the neighbouring standard algorithms. Statistical analysis with the proposed algorithm is presented, and the effectiveness is shown in the comparison of grey wolf optimization (GWO), Harris hawks optimizer (HHO), barnacles matting optimization (BMO) and hybrid GWO-PSO algorithms. The comparison in convergence characters with the considered set of optimization methods also presented along with the boxplot. The proposed algorithm is further validated via an emerging engineering case study of controller parameter tuning of power system stability enhancement problem. The considered case study tunes the parameters of STATCOM and power system stabilizers (PSS) connected in a sample power network with the proposed IHHOPSO algorithm. A multi-objective function has been considered and different operating conditions has been investigated in this papers which recommends proposed algorithm in an effective damping of power network oscillations.
Źródło:
Archives of Control Sciences; 2021, 31, 3; 553-591
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal placement and sizing of FACTS devices based on Autonomous Groups Particle Swarm Optimization technique
Autorzy:
Shehata, Ahmed A.
Refaat, Ahmed
Ahmed, Mamdouh K.
Korovkin, Nikolay V.
Powiązania:
https://bibliotekanauki.pl/articles/1841330.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active power losses minimization
AGPSO
FACTS
MFO
PSO
SVC
minimalizacja strat mocy czynnej
Opis:
This paper presents the application of Flexible Alternating Current Transmission System (FACTS) devices based on heuristic algorithms in power systems. The work proposes the Autonomous Groups Particle Swarm Optimization (AGPSO) approach fort he optimal placement and sizing of the Static Var Compensator (SVC) to minimize thetotal active power losses in transmission lines. A comparative study is conducted with other heuristic optimization algorithms such as Particle Swarm Optimization (PSO), Time-varying Acceleration Coefficients PSO (TACPSO), Improved PSO (IPSO), Modified PSO(MPSO), and Moth-Flam Optimization (MFO) algorithms to confirm the efficacy of the proposed algorithm. Computer simulations have been carried out on MATLAB with the MATPOWER additional package to evaluate the performance of the AGPSO algorithm on the IEEE 14 and 30 bus systems. The simulation results show that the proposed algorith moffers the best performance among all algorithms with the lowest active power losses and the highest convergence rate.
Źródło:
Archives of Electrical Engineering; 2021, 70, 1; 161-172
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of UPFC for enhancement of voltage profile and minimization of losses using Fast Voltage Stability Index (FVSI)
Autorzy:
Kumar, S.
Renuga, P.
Powiązania:
https://bibliotekanauki.pl/articles/140514.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
flexible AC transmission system (FACTS)
real and reactive power
Unified Power Flow Controller (UPFC)
Bacterial Foraging (BF) algorithm
Opis:
Transmission line loss minimization in a power system is an important research issue and it can be achieved by means of reactive power compensation. The unscheduled increment of load in a power system has driven the system to experience stressed conditions. This phenomenon has also led to voltage profile depreciation below the acceptable secure limit. The significance and use of Flexible AC Transmission System (FACTS) devices and capacitor placement is in order to alleviate the voltage profile decay problem. The optimal value of compensating devices equires proper optimization technique, able to search the optimal solution with less computational burden. This paper presents a technique to provide simultaneous or individual controls of basic system parameter like transmission voltage, impedance and phase angle, thereby controlling the transmitted power using Unified Power Flow Controller (UPFC) based on Bacterial Foraging (BF) algorithm. Voltage stability level of the system is defined on the Fast Voltage Stability Index (FVSI) of the lines. The IEEE 14-bus system is used as the test system to demonstrate the applicability and efficiency of the proposed system. The test result showed that the ocation of UPFC improves the voltage profile and also minimize the real power loss.
Źródło:
Archives of Electrical Engineering; 2012, 61, 2; 239-250
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability analysis and efficiency improvement of IPFC using latest PR controller
Autorzy:
Gurijala, Sridhar Babu
Kishore, D. Ravi
Nittala, Ramchandra
Godala, Rohith Reddy
Powiązania:
https://bibliotekanauki.pl/articles/1841160.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
control algorithms
FACTS devices
multilevel inverter
interline power flow controller
algorytmy sterowania
FAKTY urządzeń
falownik wielopoziomowy
interline kontroler przepływu mocy
Opis:
The deviation from the ideal waveformcauses disturbances and failure of end-user load equipment. Power traveling a long distance from the generation plant to the end-user leads to deterioration of its quality, and the intensive utilization of power leads to serious issues in the grid resulting in power quality problems. To make the system effective and able to meet modern requirements, flexible AC transmission system (FACTS) devices should be installed into the grid. The interline power flow controller (IPFC) is the latest FACTS device, which compensates for both active and reactive power among multi-line systems. The converters used in the IPFC are crucial as they can be adjusted to regulate the power flow among the lines. This paper proposes a cascaded IPFC with hysteresis and proportional resonant voltage controllers. Some main drawbacks of controllers like steady-state errors and reference tracking of converters can be easily achieved by the PR controller, which makes the system efficient and can be used for a wide range of grid applications. Hysteresis and PR controllers are explained in detail in the following sections. A comparative analysis is carried out among control algorithms to choose the suitable controller which maintains stability in the system.
Źródło:
Archives of Electrical Engineering; 2021, 70, 3; 615-630
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fakty, wartosci i 'panika moralna'
FACTS, VALUES, AND MORAL PANICS
Autorzy:
Soin, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/427861.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
VALUE-FREE INQUIRY
FACTS/VALUES DICHOTOMY
MORAL PANICS
SOCIOLOGICAL SYLLOGISM
SZTOMPKA
Wertfreiheit
dychotomia faktów i wartości
panika moralna
socjologiczny sylogizm
Sztompka.
Opis:
Artykuł zawiera krytyczną analizę głównych wątków „Powrotu do wartości we współcze- snej teorii socjologicznej”, przeprowadzoną z punktu widzenia wyników dyskusji na temat dychotomizacji faktów i wartości. Autor krytykuje stanowisko prof. Sztompki w sprawie implikacji wartości przez „socjologiczne fakty” oraz rozważa główne warunki opisowego zastosowania pojęć wartościujących. Jak wskazują wnioski z tej dyskusji, dychotomiczne ujęcie faktów i wartości w socjologii (Weber) było próbą odpowiedzi na rozproszenie gramatyki, tj. wieloznaczność reguł wiążacych oceny i faktualne kryteria ich użycia. Dlatego współczesne porzucenie postulatu Wertfreiheit – rozważane na przykładzie pojęcia „paniki moralnej” – prowadzi do przekształcenia socjologii w zbiór wykrzykników.
The article contains a critical analysis of the main threads of 'The Return to Values in Recent Sociological Theory' by Prof. Sztompka, performed from the point of view of the results of dispute over fact/value dichotomy. The author criticizes the thesis about implication of values by 'sociological facts', and ponders the main conditions of descriptive use of evaluative concepts as discussed by analytic philosophers. The main results of the dispute indicate that dichotomic approach to facts and values in sociology (Weber) was an attempt to manage on the decomposition of grammar or ambiguity of rules connecting evaluations and factual criteria of their use. That is why a recent abandoning of Wertfreiheit postulate - exemplified by the concept of 'moral panics' - leads to the transformation of sociology into a collection of avowals.
Źródło:
Studia Socjologiczne; 2011, 2(201); 147-163
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł

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