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    Wyświetlanie 1-9 z 9
    Tytuł:
    Effective use of photovoltaic systems in polish conditions
    Autorzy:
    Niechaj, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/125160.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    photovoltaics
    grid-connected systems
    prosumer systems
    Opis:
    Photovoltaic (PV) systems form two groups: grid-connected ones and stand-alone ones. The first group can be divided into: centralized systems with large power (PV farms), and decentralized systems with low-power (especially prosumer ones). The second group includes systems with electric buffer sources (especially with electrochemical batteries), and those without electric buffer sources (possibly with non-electric buffer sources). Due to significant decline in price of PV modules, both of these groups are becoming increasingly common in Poland, especially grid-connected ones. Additional factor for prosumer systems is economic and legal support in a form of exemption from fees for connection to grid, lack of additional required licenses for such connection, and possible support in a form of guaranteed sale prices to grid (feed-in tariffs) of electrical energy generated in system. However, in case of systems not covered by economic benefits, increasing, or even ensuring, their cost-effectiveness, requires the number of ventures regarding areas of proper installation and operation rules of PV generator from installer/user/owner of system, as well as selection of suitable tariff and rational restructuring of energy demands. Detailed analysis and conclusions of these ventures, especially for prosumer systems, is discussed in paper.
    Źródło:
    Journal of Ecological Engineering; 2016, 17, 5; 147-154
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Big data analysis and simulation of distributed marine green energy resources grid-connected system
    Autorzy:
    Tian, J.
    Huang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/259959.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    distributed
    ocean
    green energy resources
    grid-connected systems
    big data analysis
    Opis:
    In order to improve the working stability of distributed marine green energy resources grid-connected system, we need the big data information mining and fusion processing of grid-connected system and the information integration and recognition of distributed marine green energy grid-connected system based on big data analysis method, and improve the output performance of energy grid-connected system. This paper proposed a big data analysis method of distributed marine green energy resources grid-connected system based on closed-loop information fusion and auto correlation characteristic information mining. This method realized the big data closed-loop operation and maintenance management of grid-connected system, and built the big data information collection model of marine green energy resources grid-connected system, and reconstructs the feature space of the collected big data, and constructed the characteristic equation of fuzzy data closed-loop operation and maintenance management in convex spaces, and used the adaptive feature fusion method to achieve the auto correlation characteristics mining of big data operation and maintenance information, and improved the ability of information scheduling and information mining of distributed marine green energy resources grid-connected system. Simulation results show that using this method for the big data analysis of distributed marine green energy resources grid-connected system and using the multidimensional analysis technology of big data can improve the ability of information scheduling and information mining of distributed marine green energy resources grid-connected system, realizing the information optimization scheduling of grid-connected system. The output performance of grid connected system has been improved.
    Źródło:
    Polish Maritime Research; 2017, S 3; 182-191
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy and environmental performance analysis of grid-connected photovoltaic systems under similar outdoor conditions in the Saharan environment
    Autorzy:
    Deriche, Mohammed Amine
    Hafaifa, Ahmed
    Tahri, Ali
    Mohammedi, Kamal
    Tahri, Fatima
    Powiązania:
    https://bibliotekanauki.pl/articles/328057.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    performance assessment
    Saharan outdoor conditions
    grid-connected PV
    thin film photovoltaic modules
    energy payback
    greenhouse gases emissions
    system fotowoltaiczny
    energia
    emisja gazów cieplarnianych
    ocena wydajności
    Sahara
    Opis:
    The aim of this paper is to present a one-year performance analysis of four grid-connected PV systems installed at Ghardaia city in Algeria’s Sahara. The grid-connected PV systems are based on four different PV module technologies which are: monocrystalline silicon (m-Si), multi-crystalline silicon (mc-Si), cadmium telluride (Cd-Te) and amorphous (a-Si) PV module technologies. The PV systems based on the thin film technologies have their performance ratio better throughout the year when the performance ratio of the mc-Si technology is better in the winter season. The a-Si PV system has its performance ratio about 6.13 % more better than mc-Si and 8.90 % better than m-Si. The AC energy produced with the a-Si PV system is 13.32 % more than what the mc-Si system produces. It was found that the a-Si PV system performs better than the other technologies under the Saharan climate conditions of Ghardaia city. The energy payback time (EPBT) and greenhouse gases (GHG) emissions of the different PV systems were analyzed. The EPBT and GHG emissions per year, vary from a minimum value of 2.8 years to a maximum value of 5.73 years and from 13.24 tons to 32.03 tons of CO2/kWh for CdTe and m-Si respectively. The CdTe PV system performs better in terms of EPBT and GHG emissions compared to the other technologies (m-Si, mc-Si and a-Si) due to its low life cycle energy requirement.
    Źródło:
    Diagnostyka; 2020, 21, 2; 13-23
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Z-source converter in photovoltaic grid-connected transformer-less inverter
    Autorzy:
    Farhangi, B.
    Farhangi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/262715.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    photovoltaic power conditioner (PV PCU)
    gird-connected systems
    Z-source inverter
    inverter
    Opis:
    In PV grid connected power conditioners, usually both stepping-up the PV array voltage, and stepping-down the dc bus voltage for injection of a sinusoidal current to the grid is required. In this paper the design procedure of Z-source converter as a single phase PV grid connected transformer-less inverter is presented. The converter has one switch less than the conventional two stage power conditioner, which leads to reduction of cost. An optimum modulation pattern for the switches is proposed, and the low frequency ripple of the converter is modeled. The design of the converter is verified by simulation.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2006, 12, 2; 41-45
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unified power quality conditioner in a grid-connected photovoltaic system
    Autorzy:
    Cavalcanti, M. C.
    Azevedo, G. M.
    Amaral, B. A.
    Neves, F. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/262717.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    control systems
    converters
    energy conversion
    photovoltaic power systems
    power quality
    solar energy
    Opis:
    This paper presents a system that provides photovoltaic generation as well as the functions of a unified power quality conditioner. The system can be controlled for current harmonics and reactive power compensation simultaneously by using a converter operating as active shunt filter. The other converter is used as active series filter and it compensates voltage harmonics or voltage sags and swells. Using only an inverter in photovoltaic energy conversion process, the system presents increased efficiency when compared to the conventional systems. The synchronous reference frame method is used to control the three-phase converters. Simulation results demonstrate the good performance of the proposed configuration. Experimental results corresponding to the operation of the series filter as voltage sag compensator are presented.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2006, 12, 2; 59-69
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anti-windup strategy for an LQ current controller with oscillatory terms for three-phase grid-tie VSCs in SMES systems
    Autorzy:
    Gałecki, A.
    Grzesiak, L.
    Ufnalski, B.
    Kaszewski, A.
    Michalczuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193252.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    grid-connected converter
    linear quadratic control
    resonant control
    current control
    anti-windup
    Opis:
    The paper presents a linear-quadratic current controller with damped oscillatory terms designed for three-phase grid-tie voltage source converters used in SMES systems and operated under distorted grid voltage conditions. Special emphasis is placed on a synthesis of an anti-windup mechanism to prevent wind-up derived from the oscillatory terms by the use of a new active damping loop based on a simple moving average method. As a consequence, the current feedback gain may be increased without unwanted overshoot and overruns, and performance of the system can be improved.
    Źródło:
    Power Electronics and Drives; 2016, 1, 36/2; 65-81
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Common mode behavior in grid connected DC and AC decoupled PV Inverter topologies
    Autorzy:
    Sundar, D.J.
    Kumaran, M.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/141723.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    distributed generation
    common mode leakage current
    solar PV systems
    transformerless PV inverters
    Opis:
    The transformer-less grid connected inverters are gaining more popularity due to their high efficiency, very low ground leakage current and economic feasibility especially in photovoltaic systems. The major issue which surfaces these systems is that of common mode leakage current which arises due to the absence of an electrical transformer connected between the inverter and the utility grid. Several topologies have evolved to reduce the impact of common mode leakage current and a majority of them have succeeded in eliminating the impacts and have well kept them within the limits of grid standards. This paper compares and analyses the impact of the common mode leakage current for four popular inverter configurations through simulation of the topologies such as H5, H6, HERIC and FBZVR inverters.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 3; 481-493
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental performance characterization and economic efficiency of 16.28 kWp grid-tied PV systems in semi-arid climate
    Autorzy:
    Khennane, Messaouda Benbitour
    Boughali, Slimane
    Bechki, Djamel
    Zaghba, Layachi
    Fezzani, Amor
    Mahammed, Idriss Hadj
    Powiązania:
    https://bibliotekanauki.pl/articles/1840902.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    grid connected PV system
    performance evaluation
    sandstorm
    Saharan environment
    economic benefits
    system fotowoltaiczny
    ocena wydajności
    korzyści ekonomiczne
    Sahara
    Opis:
    The study of the paper aims to present a solar power plant performances and economic benefits of 16.28 kWp grid-tied solar PV systems under the real outdoor conditions of Ghardaïa, located in semi-arid area of the Algeria desert. The main goal of this study is to investigate the effectiveness, suitability, feasibility and reliably of these plants on the level of desert areas and under the influence of harsh conditions (desert environment) in the first part. In the second part, the contribution of solar PV plant to conventional networks in the arid and semi-arid environment to assess the rate of integration. Based on experimental measurement data, the paper also shows economic benefits of three photovoltaic plants. It was found that from the first January to last August 2019, the total produced energy by all PV arrays was 171.422 MWh which supplied to the internal grid and while, the consumed energy by the URAER unit was 159,094 kWh. Approximately 10, 95 % of the 159,094 MWh energy consumed in the whole year is provided from the generated PV solar energy that is 17,422 MWh. The total energy fed to the internal grid has grown from 27 MWh in 05/04/2018 to a maximum of 67.28 MWh recorded in 31/10/2019. The rate of integration of solar energy by all PV arrays in the internal network of the URAER varied between 6, 60% in January and 22, 96% in April. The integration of this renewable energy generation into the local grid in the URAER unit considered satisfactory over this period of operation. From the first January to last August 2019, the cost of electrical energy produced by solar plants is 2090,64 euro(277706,68 Algerian dinars) while the cost of energy consumed by the Applied Research Unit in renewable energies is 4772,82 euro(664853,826 Algerian dinars).
    Źródło:
    Diagnostyka; 2021, 22, 2; 53-65
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparision of performance of synchronization algorithms for grid connected power electronics converters according to proposed evaluation quality criteria
    Porównanie działania algorytmów synchronizacji dla energoelektronicznych przekształtników podłączonych do sieci według zaproponowanych kryteriów oceny
    Autorzy:
    Lipnicki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/408509.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    synchronization
    smart grids
    grid codes
    phase locked loop PLL
    power electronics
    renewable energy systems
    synchronizacja
    sieci inteligentne
    kody sieci
    pętla synchronizacji fazowej (PLL)
    energoelektronika
    odnawialne źródła energii
    Opis:
    In this paper a comparison of synchronization methods for power electronics converters is presented. Proposed evaluation criteria are based on Transmission System Operators requirements, as well as on criteria parameters based on requirements for design, computation and operation under normal/distorted conditions. Additionally a classification of various kinds of synchronization algorithms is discussed with a brief description of the role of power electronics in the modern power systems. All of the tested algorithms were subjected to appropriate tests validating the quality criteria for each of them. The tests were performed in terms of simulations. The investigation results are summarized in the table, which can serve as a basic selection guide.
    Niniejszy artykuł zajmuje się porównaniem metod synchronizacji z siecią dla energoelektronicznych przekształtników. Zaproponowane kryteria oceny opierają się na wymaganiach Operatorów Systemów Przesyłowych, a także na wymaganiach związanych z projektowaniem samych algorytmów, mocą obliczeniową i działaniem w warunkach normalnych lub przy zakłóceniach występujących w sieci. Przedstawiono również klasyfikację różnego rodzaju algorytmów służących do synchronizacji razem z ogólnym opisem roli energoelektronicznych układów we współczesnych systemach energetycznych. Wszystkie przedstawione algorytmy zostały zbadane według odpowiednich testów, które pozwoliły na ocenę kryteriów jakości dla każdego z nich. Badania zostały przeprowadzone w formie symulacji. Wszystkie wyniki są podsumowane w formie tabeli, która może służyć jako podstawowy przewodnik do doboru odpowiedniego algorytmu synchronizacji.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2014, 1; 62-65
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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