Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "grid connected" wg kryterium: Temat


Tytuł:
Effective use of photovoltaic systems in polish conditions
Autorzy:
Niechaj, M.
Tematy:
photovoltaics
grid-connected systems
prosumer systems
Pokaż więcej
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:
https://bibliotekanauki.pl/articles/125160.pdf  Link otwiera się w nowym oknie
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.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Passive filter design for three-phase inverter interfacing in distributed generation
Autorzy:
Ahmed, K. H.
Finney, S. J.
Williams, B. W.
Tematy:
DG
inverter
grid connected
filtering
damping
harmonics
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Powiązania:
https://bibliotekanauki.pl/articles/262578.pdf  Link otwiera się w nowym oknie
Opis:
With the growing use of inverters in distributed generation, the problem of injected harmonics becomes critical. These harmonics require the connection of low pass filters between the inverter and the network. This paper presents a design method for the output LC filter in grid coupled applications in distributed generation systems. The design is according to the harmonics standards that determine the level of current harmonics injected into the grid network. Analytical expressions for the maximum inductor ripple current are derived. The filter capacitor design depends on the allowable level of switching components injected into the grid. Different passive filter damping techniques to suppress resonance affects are investigated and evaluated. Simulated results are included to verify the derived expressions.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and simulation of grid connecting converters for photovoltaic applications in MATLAB/Simulink
Autorzy:
Zimoch, P.
Tematy:
grid connected converter
solar panel
photovoltaics
MATLAB/Simulink
Pokaż więcej
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/114140.pdf  Link otwiera się w nowym oknie
Opis:
This paper presents simulation models of a grid-connecting converter for photovoltaic applications using MATLAB/Simulink’s Simscape SimPowerSystems toolbox. Manufacturers of these converters often do not provide any information related to the topology and control algorithms, thus impeding the modeling. Simulation models of two possible topologies of SVM based current controlled three-phase converters are shown and compared. The simulation results are compared to a 9.6 kW rooftop PV plant built in Novi Sad, Serbia, by connecting a corresponding PV array model at the input of the converter models. Simulation results have shown, that the created models produce results similar to the physical system, and that both modelled topologies are possible and viable to implement.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The gearless, grid-connected, 6-phase asymmetric wind turbine generator system
Autorzy:
Gołębiowski, L.
Gołębiowski, M.
Mazur, D.
Humer, M.
Tematy:
grid connected wind power turbine
three-level converter
flying capacitors
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/141732.pdf  Link otwiera się w nowym oknie
Opis:
In this paper a system of a grid side and a generator side converters, both working with a common capacitor, is presented. The 6-phase asymmetric inset-type SMPMSM generator is used. A large pole pair number of this generator enables a gearless wind turbine operation. The fundamental and 3rd harmonic cooperation is used to increase the generator performance. This is accomplished by means of the 3rd harmonic current injection. For that reason the generator side converter must have a neutral connection.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Short-Circuit Current Contribution from Large Scale PV Power Plant in the Context of Distribution Power System Protection
Autorzy:
Bejmert, D.
Sidhu, T. S.
Tematy:
grid-connected PV power plant
transient analysis
fault contribution
overcurrent protection
Pokaż więcej
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/410525.pdf  Link otwiera się w nowym oknie
Opis:
The interconnection of distributed generators (DG) to existing network may give rise to many technical problems. To ensure appropriate power quality and stability of the grid these problems should be recognized and solved. For this purpose, behaviour of such energy sources, under various disturbances, must be studied and known to the distribution grid operators. In this paper fault current contribution from large scale photovoltaic (PV) power plant as well as protection issues concerning such DGs are discussed. The mentioned problems were investigated in PSCAD model of 50 MW grid--connected PV power plant where various operating condition of the network and penetration levels of PV were considered.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of the solar power plant performance in temperate climate
Autorzy:
Zdyb, A.
Dragan, P.
Jaremek, A.
Tematy:
photovoltaics
grid connected solar plant
photovoltaic performance
inclination angle
tilt angle
Pokaż więcej
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Powiązania:
https://bibliotekanauki.pl/articles/105126.pdf  Link otwiera się w nowym oknie
Opis:
Due to gradual depletion of fossil fuels resources and emission of harmful chemicals accompanying the combustion process, the interest in alternative energy sources still increases. Among many kinds of alternative sources, solar radiation is very special because of its wide availability and large technical potential. Photovoltaic systems providing the electric energy are used in many countries. The most important part of photovoltaic system is a module, which parameters (e.g. efficiency, rated power, temperature coefficients of power and efficiency, short circuit current, open circuit voltage) are determined in laboratory tests under Standard Test Conditions (STC: 25°C, 1,000 W/m2 , air mass 1.5). However, in real outdoor conditions the modules exhibit lower efficiency since local climate influences their performance and different external factors generate energy losses in the whole system. The aim of this work is the performance analysis of a solar power plant connected to the grid, which total rated power is 2.985 MW and it works in temperate climate in eastern Poland. Insolation in the location was estimated according to Solargis data and the role of the modules tilt angle, of which the value is non-typical for the considered location was studied. The tilt angle smaller than optimal angle allows increasing the amount of the solar radiation collected in the summer period. The electric energy production based on the inverters data in 2016 and 2017 as well as yearly yield are presented. The results are compared to data coming from other solar power plants, also located at high latitude.
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.
Tematy:
distributed
ocean
green energy resources
grid-connected systems
big data analysis
Pokaż więcej
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:
https://bibliotekanauki.pl/articles/259959.pdf  Link otwiera się w nowym oknie
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.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Feasibility Analysis of Grid-Connected Solar Photovoltaic Systems in Dhahran and Bisha, Saudi Arabia
Autorzy:
Allah, Malik Al-Abed
Tematy:
photovoltaic systems
grid connected
solar energy
greenhouse gas emissions
RETScreen software
Pokaż więcej
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:
https://bibliotekanauki.pl/articles/59113868.pdf  Link otwiera się w nowym oknie
Opis:
The potential for grid-connected solar photovoltaic (PV) systems to provide sustainable energy solutions across diverse climatic zones in Saudi Arabia was analyzed through a detailed feasibility study focusing on Dhahran and Bisha, representing different climatic conditions. In Dhahran, the power capacity for the six assessed PV technologies–Gintech, Jinko Solar, Apain Solar, Canadian Solar, Green Power, and Suntech-ranged from 11,970 kW to 12,012 kW, with the number of panels varying from 35,200 to 46,200. The solar collector area spanned from 61,242 m² to 88,715 m², and the electricity exported to the grid was consistent at approximately 18.770 MWh to 18,839 MWh. Initial costs were between USD 7,100,180 and USD 7,135,128, while revenue from exported electricity ranged from USD 912,378 to USD 915,079 with GHG emission reductions substantial at 9700 to 9736 tCO2. In Bisha, power capacities ranged between 9711 kW and 9800 kW, with panel counts from 28,600 to 37,750, and solar collector areas varying from 49.774 m² to 71,721 m². The electricity exported to the grid ranged from 18,780 MWh to 18,952 MWh. Initial costs were lower, between USD 5,768,334 and USD 5,821,200 and the revenue from exported electricity ranged from USD 912,686 to USD 921,051 with GHG emission reductions between 9705 and 9794 tCO2. These findings highlight the economic and environmental benefits of deploying grid-connected solar PV systems across different regions in Saudi Arabia, demonstrating significant potential for energy cost savings and substantial reductions in carbon emissions.
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.
Tematy:
grid-connected converter
linear quadratic control
resonant control
current control
anti-windup
Pokaż więcej
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/1193252.pdf  Link otwiera się w nowym oknie
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.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current limiting algorithm for three-phase grid-connected inverters
Autorzy:
Tran, Tho Quang
Tematy:
current limitation
negative sequences
reactive power compensation
three-phase grid-connected inverter
unbalanced voltages
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2135740.pdf  Link otwiera się w nowym oknie
Opis:
Grid-connected inverters are commonly used in systems of renewable energy to convert this energy source into AC power with parameters suitable for connection to the grid. In the normal operating conditions, the grid-connected inverters mainly generate active power to the grid. However, when a voltage sag or voltage imbalance occurs, the grid voltage imbalance in the conventional control methods causes negative sequence components and increases the output current magnitude of inverters. The increase of current can damage power semiconductor devices. This paper presents a strategy to limit the current magnitude of inverters under unbalanced grid voltage conditions. In this strategy, a multiple-complex-coefficient filter is used to eliminate the negative sequence voltage components. This method does not require any additional hardware. A three-phase gridconnected photovoltaic inverter system using a solar array of 20 kWp is also used for the survey. The effectiveness has been validated when comparing the simulation results on Matlab/Simulink of the proposed method with those of the conventional method.
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies