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    Wyświetlanie 1-8 z 8
    Tytuł:
    Trade based on alliance chain in energy from distributed photovoltaic grids
    Autorzy:
    Ding, Ran
    Feng, Chaohan
    Wang, Dongsheng
    Sun, Rongfu
    Wang, Longyang
    Yuan, Shaojun
    Powiązania:
    https://bibliotekanauki.pl/articles/1841289.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    alliance chain
    distributed photovoltaic grid
    power transmission loss
    pricing strategy
    łańcuch sojuszu
    rozproszona sieć fotowoltaiczna
    straty w przenoszeniu mocy
    polityka cenowa
    Opis:
    With the rapid development of distributed photovoltaic grids, more and more users join the power sales side, and the traditional power grid operation mode is no longer applicable. This paper analyzes the characteristics of the distributed photovoltaic grid under overload conditions, and further summarizes the problems that the distributed photovoltaic grid will face under these conditions. To solve these problems, the alliance chain technology was introduced into the distributed photovoltaic grid. At the same time, this paper establishes a photovoltaic pricing strategy that considers power transmission loss. Finally, the feasibility of the theory is verified by constructing a virtual model.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 2; 325-336
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel merchant optimization algorithm for solving optimal reactive power problem
    Autorzy:
    Lenin, Kanagasabai
    Powiązania:
    https://bibliotekanauki.pl/articles/1837360.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    optimal reactive power
    transmission loss
    merchant optimization algorithm
    Opis:
    In this paper Merchant Optimization Algorithm (MOA) is proposed to solve the optimal reactive power problem. Projected algorithm is modeled based on the behavior of merchants who gain in the market through various mode and operations. Grouping of the traders will be done based on their specific properties, and by number of candidate solution will be computed to individual merchant. First Group named as “Ruler candidate solution” afterwards its variable values are dispersed to the one more candidate solution and it named as “Serf candidate solution” In standard IEEE 14, 30, 57 bus test systems Merchant Optimization Algorithm (MOA) have been evaluated. Results show the proposed algorithm reduced power loss effectively.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2021, 15, 1; 51-56
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Active power loss reduction by novel feral cat swarm optimization algorithm
    Autorzy:
    Lenin, Kanagasabai
    Powiązania:
    https://bibliotekanauki.pl/articles/384742.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    optimal reactive power
    Transmission loss
    Feral Cat Swarm Optimization Algorithm
    Opis:
    In this paper Feral Cat Swarm Optimization (FCS) Algorithm is proposed to solve optimal reactive power problem. Projected methodology has been modeled based on the activities of the feral cats. They have two main phases primarily “seeking mode”, “tracing mode”. In the proposed FCS algorithm, population of feral cats are created and arbitrarily scattered in the solution space, with every feral cat representing a solution. Produced population is alienated into two subgroups. One group will observe their surroundings which come under the seeking mode and another group moving towards the prey which will come under the tracing mode. New-fangled positions, fitness functions will be calculated subsequent to categorization of feral cats for seeking mode and tracing mode, through that cat with the most excellent solution will be accumulated in the memory. Feral Cat Swarm Optimization (FCS) Algorithm has been tested in standard IEEE 30 bus test system and simulation results show the projected algorithm reduced the real power loss considerably.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 2; 25-29
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Timber wolf optimization algorithm for real power loss diminution
    Autorzy:
    Lenin, Kanagasabai
    Powiązania:
    https://bibliotekanauki.pl/articles/950973.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    TWO algorithm
    optimal reactive power
    transmission loss
    Timber Wolf optimization algorithm
    Opis:
    In this paper Timber Wolf optimization (TWO) algorithm is proposed to solve optimal reactive power problem. Timber Wolf optimization (TWO) algorithm is modeled based on the social hierarchy and hunting habits of Timber wolf towards finding prey. Based on their fitness values social hierarchy has been replicated by classifying the population of exploration agents. Exploration procedure has been modeled by imitating the hunting actions of timber wolf by using searching, encircling, and attacking the prey. There are three fittest candidate solutions embedded as α, β and γ to lead the population toward capable regions of the exploration space in each iteration of Timber Wolf optimization. Proposed Timber Wolf optimization (TWO) algorithm has been tested in standard IEEE 14, 30 bus test systems and simulation results show the projected algorithm reduced the real power loss efficiently.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 1; 24-28
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the Effect of Uncertainties on the Acoustic Behavior of a Porous Material Located in a Duct Element Using the Monte Carlo Method
    Autorzy:
    Hannachi, Hanen
    Trabelsi, Hassen
    Kani, Marwa
    Taktak, Mohamed
    Chaabane, Mabrouk
    Haddar, Mohamed
    Powiązania:
    https://bibliotekanauki.pl/articles/31339920.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    porous material
    physical parameters
    transmission loss
    acoustic power attenuation
    Monte Carlo
    method
    Opis:
    When studying porous materials, most acoustical and geometrical parameters can be affected by the presence of uncertainties, which can reduce the robustness of models and techniques using these parameters. Hence, there is a need to evaluate the effect of these uncertainties in the case of modeling acoustic problems. Among these evaluation methods, the Monte Carlo simulation is considered a benchmark for studying the propagation of uncertainties in theoretical models. In the present study, this method is applied to a theoretical model predicting the acoustic behavior of a porous material located in a duct element to evaluate the impact of each input error on the computation of the acoustic proprieties such as the reflection and transmission coefficients as well as the acoustic power attenuation and the transmission loss of the studied element. Two analyses are conducted; the first one leads to the evaluation of the impacts of error propagation of each acoustic parameter (resistivity, porosity, tortuosity, and viscous and thermal length) through the model using a Monte Carlo simulation. The second analysis presents the effect of propagating the uncertainties of all parameters together. After the simulation of the uncertainties, the 95% confidence intervals and the maximum and minimum errors of each parameter are computed. The obtained results showed that the resistivity and length of the porous material have a great influence on the acoustic outputs of the studied model (transmission and reflection coefficients, transmission loss, and acoustic power attenuation). At the same time, the other physical parameters have a small impact. In addition, the acoustic power attenuation is the acoustic quantity least impacted by the input uncertainties.
    Źródło:
    Archives of Acoustics; 2023, 48, 1; 81-91
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling of sound power transmission within duct systems
    Autorzy:
    Strek, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2146600.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    transmission loss
    finite element method
    dimensionless acoustic equations
    sound power
    izolacyjność akustyczna
    metoda elementów skończonych
    moc akustyczna
    Opis:
    External boundaries of acoustic devices can channel sound propagation, and in some cases can create buildup or attenuation of acoustic energy within a confined space. In this paper, it is proposed an efficient practical numerical method (based on FEM) of calculation of attenuation of sound power transmission through ducts. The method shows its viability by presenting the reasonably consistent anticipation of the experimental result. One can observe the mechanical behaviour of the duct’s medium for lower frequencies (high transmission loss) and wave behaviour for higher frequencies (small or zero attenuation). The authors proved that mechanical vibrations of medium reduce the possibility of acoustic energy transmission in duct systems. The radiation impedance for the duct is calculated as well.
    Źródło:
    Vibrations in Physical Systems; 2020, 31, 3; art. no. 2020320
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Continuously variable transmission leakage test results
    Autorzy:
    Goszczak, Jarosław
    Radzymiński, Bartosz
    Mitukiewicz, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/105918.pdf
    Data publikacji:
    2019
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    passenger car‘s driveline
    power loss
    efficiency improvement
    continuously variable transmission
    hydraulic control system
    leakage values
    układ napędowy samochodu osobowego
    strata mocy
    poprawa wydajności
    przekładnia bezstopniowa
    hydrauliczne układy sterowania
    Opis:
    After a short introduction characterizing the general outline of the issue, this paper describes the test results of oil leakage measurements through CVT actuator seals. The research was done using Jatco company's CVT 7model, the popular gearbox for small passenger cars. Several curves of leakage values are given for both actuators, concerning different conditions such as rotational speed, oil temperature or pressure. In the summary several conclusions are formulated, based on presented test results. The determined maximal value of leakage is about 1 l/min. It emerged that the influence of centrifugal force is negligible. What is more, the observed phenomena are shortly described and projected for more detailed investigation.
    Źródło:
    Acta Innovations; 2019, 31; 5-13
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Symulacja niekontrolowanego ruchu górniczej kolejki podwieszonej po upadzie w sytuacji utraty sprzężenia z liną układu napędowego
    Simulation of uncontrolled movement of mining suspended monorail after a decline in the situation of loss of coupling with the power transmission system cable
    Autorzy:
    Gospodarczyk, P.
    Kalukiewicz, A.
    Stopka, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/404210.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Symulacji Komputerowej
    Tematy:
    symulacja
    ruch niekontrolowany
    kolejka podwieszona
    kolejka górnicza
    utrata sprzężenia
    lina układu napędowego
    wypadek
    simulation
    uncontrolled movement
    suspended monorail
    mining monorail
    loss of coupling
    power transmission system cable
    accident
    Opis:
    W artykule przedstawiono wykorzystanie symulacji ruchu linowej kolejki podwieszonej dla rekonstrukcji wypadku ze skutkiem śmiertelnym spowodowanego awarią zacisku linowego. Awaria spowodowała zmniejszenie siły sprzężenia i samoczynny zjazd zestawu transportującego pakiet łuków obudowy chodnikowej typu ŁP w wyrobisku o dużym nachyleniu. W referacie opisano obiekt modelowania i przyjęte w modelu uproszczenia. Następnie opisano sposób zadania więzów par kinematycznych w module symulacji dynamicznej programu Autodesk Inventor, który wykorzystano dla rekonstrukcji przebiegu wypadku. Z uwagi na brak szeregu danych koniecznym było wykorzystanie metody prób i błędów, co ze względu na stopień komplikacji obiektu i czasy obliczeń wymagało zastosowania złożonej metodyki badań przy różnym stopniu uproszczeń. Zaprezentowano wyniki symulacji i wynikające z nich wnioski praktyczne.
    The article presents application of suspended monorail movement simulation for reconstruction of a deadly accident caused by a rope clamp breakdown. The breakdown decreased the coupling forces and caused automatic downhill run of a string of cars transporting a set of heading lining arches of ŁP type in an excavation of high inclination. The paper describes the modelling object and accepted simplifications in the model. Next it presents methods of determining kinematic pairs in a dynamic simulation module of Autodesk Inventor program which was used for the course of the accident reconstruction. Due to the lack of a lot of data, it was necessary to employ the trial-and-error method requiring application of complex methodology of tests at different level of simplification because of the level of the object complication and calculation times. There were presented the simulation results and practical conclusions.
    Źródło:
    Symulacja w Badaniach i Rozwoju; 2010, 1, 3; 233-244
    2081-6154
    Pojawia się w:
    Symulacja w Badaniach i Rozwoju
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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