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Wyszukujesz frazę "Microgrid" wg kryterium: Temat


Tytuł:
From A Climate Action Plan (CAP) to a Microgrid: The SEEU Sustainability Concept Including Social Aspects
Autorzy:
Abazi, Alajdin
Iljazi, Iljas
Spirovski, Darko
Powiązania:
https://bibliotekanauki.pl/articles/1035820.pdf
Data publikacji:
2011
Wydawca:
Academicus. International Scientific Journal publishing house
Tematy:
Microgrid
Intelligent Microgrid
Climate Action Plan (CAP)
Energy Efficiency
Power Quality (PQ)
Green House Gases (GHG)
Carbon Footprint
Opis:
Following new global trends, the South East European University (SEEU), besides excellence in teaching and research, is committed to contributing to climate change effects and energy efficiency. SEEU will introduce a microgrid as a further step from the CAP towards energy sustainability. This paper presents the SEEU CAP and microgrid and also highlights benefits that are related to socio-economic conditions and the environment, including social aspects and sustainability.
Źródło:
Academicus International Scientific Journal; 2011, 04; 42-59
2079-3715
2309-1088
Pojawia się w:
Academicus International Scientific Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fault Current Limiter optimal sizing considering different Microgrid operational modes using Bat and Cuckoo Search Algorithm
Autorzy:
Arani, A. A. K.
Bayati, N.
Mohammadi, R.
Gharehpetian, G. B.
Sadeghi, S. H.
Powiązania:
https://bibliotekanauki.pl/articles/140644.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault current limiter (FCL)
Bat Algorithm (BA)
Cuckoo Search Algorithm (CSA)
microgrid (MG)
Opis:
Nowadays, the development of smart grids has been the focus of attention due to its advantages for power systems. One of the aspects of smart grids defined by using distributed generation (DG) in a low voltage network is a microgrid (MG). Based on its operational states, MG can operate in different configurations such as grid-connected mode or off-grid mode. The switching between these states is one of the challenging issues in this technical area. The fault currents in different buses have higher value compared to islanded mode of MG when the MG is connected to the main grid, which influences the protection equipment. In this situation, some electrical devices may be damaged due to the fault currents. Application of a fault current limiter (FCL) is considered as an effective way to overcome this challenge. The optimal size of these FCLs can optimize the performance of an MG. In this paper, an index for FCL size optimization has been used. In addition, two optimization algorithms (Bat Algorithm and Cuckoo Search Algorithm) have been applied to the problem. The application of an FCL has been studied in grid-connected and islanded-mode. In addition, the application of the capacitor bank in both modes has been investigated. The results of simulations carried out by MATLAB have been presented and compared.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 321--332
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent energy management system of a smart microgrid using multiagent systems
Autorzy:
Azeroual, Mohamed
Lamhamdi, Tijani
El Moussaoui, Hassan
El Markhi, Hassane
Powiązania:
https://bibliotekanauki.pl/articles/140667.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
artificial intelligence
fault detection
microgrid
multi-agent system (MAS)
power distribution
smart grid
Opis:
The smart grid concept is predicated upon the pervasive use of advanced digital communication, information techniques, and artificial intelligence for the current power system, to be more characteristics of the real-time monitoring and controlling of the supply/demand. Microgrids are modern types of power systems used for distributed energy resource (DER) integration. However, the microgrid energy management, the control, and protection of microgrid components (energy sources, loads, and local storage units) is an important challenge. In this paper, the distributed energy management algorithm and control strategy of a smart microgrid is proposed using an intelligent multi-agent system (MAS) approach to achieve multiple objectives in real-time. The MAS proposed is developed with co-simulation tools, which the microgrid model, simulated using MATLAB/Simulink, and the MAS algorithm implemented in JADE through a middleware MACSimJX. The main study is to develop a new approach, able to communicate a multi-task environment such as MAS inside the S-function block of Simulink, to achieve the optimal energy management objectives.
Źródło:
Archives of Electrical Engineering; 2020, 69, 1; 23-38
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new power management strategy for PV-FC-based autonomous DC microgrid
Autorzy:
Bhat Nempu, P.
Sabhahit Jayalakshmi, N.
Powiązania:
https://bibliotekanauki.pl/articles/140476.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
DC microgrid
electrolyzer
fuzzy logic controller
PEM fuel cell
PV Array
supercapacitor bank
Opis:
Solar energy is widely available in nature and electricity can be easily extracted using solar PV cells. A fuel cell being reliable and environment friendly becomes a good choice for the backup so as to compensate for continuously varying solar irradiation. This paper presents simple control schemes for power management of the DC microgrid consisting of PV modules and fuel cell as energy sources and a hydrogen electrolyzer system for storing the excess power generated. The supercapacitor bank is used as a short term energy storage device for providing the energy buffer whenever sudden fluctuations occur in the input power and the load demand. A new power control strategy is developed for a hydrogen storage system. The performance of the system is assessed with and without the supercapacitor bank and the results are compared. A comparative study of the voltage regulation of the microgrid is presented with the controller of the supercapacitor bank, realized using a traditional PI controller and an intelligent fuzzy logic controller.
Źródło:
Archives of Electrical Engineering; 2018, 67, 4; 815-828
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic Dispatch for on-line operation of grid-connected microgrids
Autorzy:
Cagnano, A.
De Tuglie, E.
Marcone, F.
Porro, G.
Rasolomampionona, D. D.
Powiązania:
https://bibliotekanauki.pl/articles/200425.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
microgrids
on-line economic dispatch
distributed energy sources
active distribution network
microgrid planning
Opis:
In this paper, a control strategy for real-time operation of a master-slave controlled microgrid is developed. The basic idea of this control strategy is to schedule all dispatchable energy sources available into a microgrid to minimize its operational costs. Control actions are centrally evaluated by solving a two-stage optimization problem formulated to take place on two different time-scales: in the day-ahead and in the real-time. The first one provides a 24-hour plan in advance. It mainly draws up the active power levels that Distributed Energy Resources (DERs) should provide for each quarter hour of the next day by taking into account energy prices of the day-ahead energy market, the forecasted energy production of non-dispatchable renewables and loads. The real-time optimization problem updates the active power set-points of DERs in order to minimize as much as possible the real-time deviations between the actual power exchanged with the utility grid and its scheduled value. The effectiveness of the proposed methodology has been experimentally tested on an actual microgrid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 651-659
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PQ Cootrol of Photovoltaic Power Statioo in Microgrid Operation
Autorzy:
Cygan, S.
Łukowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/410543.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
inverter PQ control
PowerSys microgrid model
microgird control
Opis:
The numerical modelling of the photovoltaic module and the solar inverter interconnected with the microgrid has been carried out with the use of PowerSys in Matlab/Simulink. Algorithms of P, Q controllers have been proposed. The capability of the active and reactive power reference tracking has been tested for various conditions.
Źródło:
Present Problems of Power System Control; 2017, 8; 51-59
2084-2201
Pojawia się w:
Present Problems of Power System Control
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparing the use of two kinds of droop control under microgrid islanded operation mode
Autorzy:
Gao, D.
Jiang, J.
Qiao, S.
Powiązania:
https://bibliotekanauki.pl/articles/140937.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
microgrid
microsource
droop control
power distribution
Opis:
A microgrid with parallel structure operating under islanded mode is considered in this paper. Under microgrid islanded operation mode, lines bring adverse effect for power distribution between microsources (MSs). Because traditional droop control ignores this effect, MSs adopting this method can not achieve satisfactory power distribution. A kind of droop control including line compensation applied to this microgrid is proposed. It can eliminate this effect to obtain satisfactory power distribution. The relationship of two kinds of droop control with power distribution is analyzed. The reference voltage generated by droop control is applied to control output voltage of MSs. Comparison of two kinds of droop control through MATLAB/Simulink simulation is made to verify the superiority of droop control including line compensation for power distribution. The relationship between PCC voltage and output power of MSs is also presented.
Źródło:
Archives of Electrical Engineering; 2013, 62, 2; 321-331
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal placement and sizing of distributed generator units using genetic optimization algorithms
Autorzy:
Haesens, E.
Espinoza, M.
Pluymers, B.
Goethals, I.
Thong, V. V.
Driesen, J.
Belmanss, R.
Moor, B. de
Powiązania:
https://bibliotekanauki.pl/articles/262691.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
distributed generation
optimization methods
microgrid
Opis:
In this article the authors describe how genetic optimization algorithms can be used to find the optimal size and location of distributed generation units in a residential distribution grid. Power losses are minimized while the voltage profile is kept at an acceptable level. The method is applied on a system based on an existing grid topology with production and residential load data based on measurements. Different scenarios are chosen to run the algorithm. The obtained optimal location and size prove to depend strongly on the given conditions.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2005, 11, 1; 97-104
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transforming distribution system into a sustainable isolatedmicrogrid considering contingency
Autorzy:
Hari Kumar, R.
Mayadevi, N.
Mini, V. P.
Ushakumari, S.
Powiązania:
https://bibliotekanauki.pl/articles/202424.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
isolated microgrid
distributed generation
reliability
sustainability
prioritized load management
reconfiguration
Opis:
Currently, the distribution system has been adapted to include a variety of Distributed Energy Resources (DERs). Maximum benefits can be extracted from the distribution system with high penetration of DERs by transforming it into a sustainable, isolated microgrid. The key aspects to be addressed for this transformation are the determination of the slack bus and assurance of reliable supply to the prioritized loads even during contingency. This paper explores the possibilities of transforming the existing distribution system into a sustainable isolated net-work by determining the slack bus and the optimal locations and capacity of Distributed Generators (DGs) in the isolated network, taking into account the contingencies due to faults in the network. A combined sensitivity index is formulated to determine the most sensitive buses for DG placement. Further, the reliability based on the loss of load in the isolated system when a fault occurs is evaluated, and the modifications required in for reliability improvement are discussed. The supremacy of the transformed isolated network with distributed generators is comprehended by comparing the results from conventional IEEE 33-bus grid connected test system and modified IEEE 33-bus isolated test system having no interconnection with the main grid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 5; 871-881
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real time voltage stabilization in microgrid
Autorzy:
Jangjoo, M. A.
Seifi, A. R.
Powiązania:
https://bibliotekanauki.pl/articles/141091.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
capacitor
distributed generation (DG)
on load tap changer (OLTC)
voltage stabilization
microgrid
Opis:
This study suggests a new algorithm based on a combination of fuzzy logic and genetic algorithm (GA) to improve voltage profile in a microgrid. The considered microgrid includes control variables such as onload tap changer (OLTC), active power output from distributed generators (DG) and reactive power output from feeder switched capacitors that are controlled in a microgrid controller (MGC) by communication links. The proposed method was used to obtain the optimum value of control variables to establish voltage stabilization in varying load condition as online. For establishing voltage stabilization at the microgrid, an objective function is defined and is tried to minimize it by control variables. The control variables were changed based on fuzzy logic and the GA was employed for finding the optimum shape of membership functions. In order to verify the proposed method, a 34 buses microgrid in varying load condition was analyzed and was compared with previous works.
Źródło:
Archives of Electrical Engineering; 2014, 63, 2; 273-293
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid parametric islanding detection technique for microgrid system
Autorzy:
Jayanthi, S.
Xavier, S. Arockia Edwin
Manoharan, P.S.
Powiązania:
https://bibliotekanauki.pl/articles/2173549.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
distributed generation
ESPRIT
exact signal parametric rotational invariance technique
microgrid
battery energy storage system
islanding
wytwarzanie rozproszone
mikrosiatka
akumulatorowy system magazynowania energii
zasilanie wyspowe
Opis:
In microgrid distribution generation (DG) sources are integrated parallelly for the economic and efficient operation of a power system. This integration of DG sources may cause many challenges in a microgrid. The islanding condition is termed a condition in which the DG sources in the microgrid continue to power the load even when the grid is cut off. This islanding situation must be identified as soon as possible to avoid the collapse of the microgrid. This work presents the hybrid islanding detection technique. This technique consists of both active and parametric estimation methods such as slip mode shift frequency (SMS) and exact signal parametric rotational invariance technique (ESPRIT), respectively. This technique will easily distinguish between islanding and non-islanding events even under very low power perturbations. The proposed method also has no power quality impact. The proposed method is tested with UL741 standard test conditions.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e140101, 1--8
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problematyka zasobników energii oraz mikrosieci w kontekście sterowania przepływem energii
Energy storage and microgrid in energy flow control
Autorzy:
Kaczorowska, D.
Powiązania:
https://bibliotekanauki.pl/articles/2056384.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
zasobniki energii
system fotowoltaiczny
mikrosieć
rozproszone źródła energii
energy storage
photovoltaic system
microgrid
distributed energy resources
Opis:
Zwiększona liczba rozproszonych źródeł energii w sieci oraz ich nieregularna, losowa generacja powoduje powstawanie problemów z bilansowaniem mocy w systemie elektroenergetycznym. Ważnym elementem mikrosieci, który pozwala na zwiększenie kontroli nad przepływem wytwarzanej energii, są zasobniki energii. W artykule przedstawiono krótkie zestawienie istniejących zasobników oraz szczegółowo omówiono rozwiązania najczęściej stosowane. Następnie na podstawie opracowanego scenariusza sterowania przepływem energii w mikrosieci, zaprezentowano rozpływy mocy oraz pracę zasobnika. Dane generacji wykorzystane podczas symulacji są rzeczywistymi danymi mierzonymi w instalacji znajdującej się na dachu budynku Politechniki Wrocławskiej znormalizowanymi do 1 kW mocy zainstalowanej. Dane odbioru pochodzą z pomiarów w sieci małej miejscowości w pobliżu Wrocławia. Zasobniki wykorzystane w prezentowanych analizach są typowymi magazynami dostępnymi komercyjnie.
The increased amount of distributed energy resources in the grid and their irregular, random generation cause problems with power balancing in the power system. Energy storage is important element of microgrid. It allows to increase control over the flow of generated energy. The article presents a brief overview of existing energy storages and discusses the most frequently used solutions. Then, on the basis of the power flow control scenario in microgrid, the power flow and the work of one of the energy storage were presented. The generation data used during the simulation is the actual data collected from the installation located on the roof of the Wrocław University of Technology building, normalized to 1kW. The load come from a small town near Wroclaw. The energy storage used in the presented characteristic of power flow is the Tesla storage.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2018, 2, 118; 119--123
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Praca zasobnika energii elektrycznej w sieci z generacją rozproszoną
Work of energy storage in a microgrid with distributed generation
Autorzy:
Kaczorowska, D. N.
Powiązania:
https://bibliotekanauki.pl/articles/131400.pdf
Data publikacji:
2017
Wydawca:
Uczelnia Jana Wyżykowskiego
Tematy:
generacja rozproszona
mikrogrid
obciążenie o profilu przemysłowym
system fotowoltaiczny
zasobnik energii
distributed generation
microgrid
industrial profile of load
photovoltaic system
energy storage
Opis:
Coraz więcej mocy w systemie elektroenergetycznym pochodzi z odnawialnych źródeł energii. Zarówno właściciele niewielkich gospodarstw domowych, jak i duże ośrodki przemysłowe montują własne źródła energii. W związku ze zmiennym profilem zarówno obciążenia, jak i generacji istnieje potrzeba realizowania coraz szerszych badań w tej dziedzinie. W artykule przedstawiono wyniki badań na temat współpracy systemu elektroenergetycznego, źródła o profilu generacji obrazującym rzeczywistą instalację, obciążenia o profilu przemysłowym oraz kilku wybranych zasobników energii.
More and more power in the power system comes from renewable energy sources. Both owners of small households and CEO’s of large industrial companies install their own energy sources. Due to the variable profile of both load and generation, there is a need for more and more research in this field. The paper presents results of studies on the cooperation between a power system, a source with a generation profile corresponded with real installation, an industrial load and several selected energy stores.
Źródło:
Zeszyty Naukowe Uczelni Jana Wyżykowskiego. Studia z Nauk Technicznych; 2017, 6; 133-139
2543-6740
Pojawia się w:
Zeszyty Naukowe Uczelni Jana Wyżykowskiego. Studia z Nauk Technicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart control of energy storage system in residential photovoltaic systems for economic and technical efficiency
Autorzy:
Kaczorowska, Dominika
Rezmer, Jacek
Janik, Przemysław
Sikorski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2202548.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
economic efficiency
energy storage system ESS
microgrid management
optimal power flow
OPF
particle swarm optimisation PSO
Opis:
In recent years, due to the increasing number of renewable energy sources, which are characterised by the stochastic nature of the generated power, interest in energy storage has increased. Commercial installations use simple deterministic methods with low economic efficiency. Hence, there is a need for intelligent algorithms that combine technical and economic aspects. Methods based on computational intelligence (CI) could be a solution. The paper presents an algorithm for optimising power flow in microgrids by using computational intelligence methods. This approach ensures technical and economic efficiency by combining multiple aspects in a single objective function with minimal numerical complexity. It is scalable to any industrial or residential microgrid system. The method uses load and generation forecasts at any time horizon and resolution and the actual specifications of the energy storage systems, ensuring that technological constraints are maintained. The paper presents selected calculation results for a typical residential microgrid supplied with a photovoltaic system. The results of the proposed algorithm are compared with the outcomes provided by a deterministic management system. The computational intelligence method allows the objective function to be adjusted to find the optimal balance of economic and technical effects. Initially, the authors tested the invented algorithm for technical effects, minimising the power exchanged with the distribution system. The application of the algorithm resulted in financial losses, €12.78 for the deterministic algorithm and €8.68 for the algorithm using computational intelligence. Thus, in the next step, a control favouring economic goals was checked using the CI algorithm. The case where charging the storage system from the grid was disabled resulted in a financial benefit of €10.02, whereas when the storage system was allowed to charge from the grid, €437.69. Despite the financial benefits, the application of the algorithm resulted in up to 1560 discharge cycles. Thus, a new unconventional case was considered in which technical and economic objectives were combined, leading to an optimum benefit of €255.17 with 560 discharge cycles per year. Further research of the algorithm will focus on the development of a fitness function coupled to the power system model.
Źródło:
Archives of Electrical Engineering; 2023, 72, 1; 81--102
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A decentralized control strategy to bring back frequency and share reactive power in isolated microgrids with virtual power plant
Autorzy:
Khanjanzadeh, Amir
Soleymani, Soodabeh
Mozafari, Babak
Powiązania:
https://bibliotekanauki.pl/articles/2173517.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PFDC
power-frequency droop control
VPP
virtual power plant
microgrid
virtual impedance
decentralized control
kontrola spadku częstotliwości zasilania
elektrownia wirtualna
mikrosieci
wirtualna impedancja
zdecentralizowana kontrola
Opis:
In this paper, a novel Power-Frequency Droop Control (PFDC) is introduced to perfectly bring back the system frequency and share the reactive power in isolated microgrid with virtual power plant (VPP). The frequency-based power delivery must be essentially implemented in VPP which can operate as a conventional synchronous generator. It has been attained by enhancing the power processing unit of each VPP to operate as an active generator. The inverter coupling impedance which has been assigned by the virtual impedance technique has reduced the affected power coupling resulting from line resistance. The reference has been subsequently adjusted to compensate the frequency deviation caused by load variation and retrieve the VPP frequency to its nominal value. In addition, the line voltage drop has compensated the voltage drop and load sharing error to obliterate the reactive power sharing imprecision resulting from the voltage deviation. The voltage feedback confirms the correct voltage after compensating the voltage drop. As an illustration, conventional PFDC after a load change cannot restore the system frequency which is deviated from 50 Hz and rested in 49.9 Hz while, proposed PFDC strategy fades away the frequency deviation via compensating the variation of the frequency reference. Likewise, the frequency restoration factor ( γ) has an effective role in retrieving the system frequency, i.e., the restoration rate of the system frequency is in proportion with γ. As a whole, the simulation results have pointed to the high performance of proposed strategy in an isolated microgrid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136190, 1--9
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł

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