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Wyświetlanie 1-10 z 93
Tytuł:
Application of the matrix converter to power flow control
Autorzy:
Szcześniak, P.
Fedyczak, Z.
Powiązania:
https://bibliotekanauki.pl/articles/141546.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
matrix converter
AC systems
power flow
Opis:
Advanced power electronic converters can provide the means to control power flow and ensure proper and secure operation of the future power grid. The small electrical energy sources dispersed in electrical power systems referred to as distributed generation are one of the most significant parts of future grids - Smart Grids. The threephase, direct matrix converter is an alternative solution to the conventional AC-DC-AC converter for interfacing two AC systems in distributed power generation with different voltage and/or frequency parameters. This paper presents a control analysis of a threephase matrix converter employed as a power interface of future electrical grids. The proposed system has been successfully tested for bidirectional power flow operation with different grid operating conditions, such as, frequency and voltage variation.
Źródło:
Archives of Electrical Engineering; 2014, 63, 3; 409-422
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Investigations of the Upqc Arrangement
Autorzy:
Benysek, G.
Powiązania:
https://bibliotekanauki.pl/articles/262602.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power quality
power flow control
harmonics compensation
reactive power compensation
Opis:
This paper presents the fundamental properties and dependences describing the UPQC (Unified Power Quality Conditioner) arrangements. The UPQC devices simultaneously permit to fulfill the following functions: voltage and current harmonics compensation, network voltage and load current symmetrization as well as network voltage stabilization and power flow control. The selected results of the experimental investigations conducted on the small power laboratory model have been described. Applied method for DC link capacity selection was talked over in details and confirmed with experimental results. Results of experimental investigations, including operation of the UPQC arrangement in case of thyristor rectifier load were also introduced.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 1; 27-34
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis of a power transmission system under uncertain load conditions and network configurations
Autorzy:
Zio, E.
Piccinelli, R.
Delfanti, M.
Olivieri, V.
Pozzi, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069672.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
vulnerability
electric power transmission network
load flow
power flow betweenness centrality
uncertainty
Opis:
In this paper, the load flow problem in a power transmission network is studied in presence of load and Power generation uncertainties and transmission lines failures. Network performance indicators are computed and the importance of the different components is evaluated by a power flow betwenness centrality measure.
Źródło:
Journal of Polish Safety and Reliability Association; 2010, 1, 1; 279--284
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-objective optimal power flow for electric power systems based on crow search algorithm
Autorzy:
Fathy, A.
Abdelaziz, A.
Powiązania:
https://bibliotekanauki.pl/articles/140618.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
crow search algorithm
distribution network
optimal power flow
Opis:
This paper presents the application of a recent meta-heuristic optimization technique named a crow search algorithm (CSA) in solving the problem of an optimal power flow (OPF) for electric power systems. Various constrained objective functions, total fuel cost, active power loss and pollutant emission are proposed. The generators’ output powers, generators’ terminal voltages, transmission lines’ taps and the shunt capacitors’ reactive powers are considered as variables to be designed. The proposed methodology based on the CSA is applied on an IEEE 30-bus system and IEEE 118-bus system. The obtained results via the CSA are compared to others and they ensure the superiority of the CSA in solving the OPF problem in electric power systems.
Źródło:
Archives of Electrical Engineering; 2018, 67, 1; 123-138
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New approaches for the identification of influential and critical nodes in an electric grid
Autorzy:
Adebayo, Isaiah
Sun, Yanxia
Powiązania:
https://bibliotekanauki.pl/articles/2135727.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
centrality measures
critical nodes
influential nodes
power flow
power system
Opis:
The aftermath of including new technologies in a modern electric system in conjunction with the incessant rise in power demand could pose a risk to the optimal operation of the system. Therefore, it becomes imperative to identify the most influential and critical nodes of such a system to avert future problems in network operation. In this paper, to identify most significant nodes of the system, the authors propose two measures of centrality in accordance with the network structural properties of a power system, namely, degree centrality (DC) and eigenvector centrality (EC). These are expressed considering the admittance matrix that exists among the interconnection of load to load nodes in an electrical power network. A critical node closeness centrality (CNCC) method is also proposed to identify critical nodes of the system. This is done by modifying the conventional closeness centrality (CC) to include the influence of interconnection that exists between network load to load nodes as captured by the admittance matrix between them. A comparative analysis of the proposed techniques with other conventional methods is also carried out. The result of the simulation shows that the proposed methods could serve as alternative tools in the identification of influential and weak nodes in a power system.
Źródło:
Archives of Electrical Engineering; 2022, 71, 3; 671--686
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Optimal location of interline power flow controller in a power system network using ABC algorithm
Autorzy:
Sreejith, S.
Psimon, S.
Selvan, M.P.
Powiązania:
https://bibliotekanauki.pl/articles/141232.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
IPFC
power injection model
power flow control
ABC algorithm
cost minimization
Opis:
This paper proposes a methodology based on installation cost for locating the optimal position of interline power flow controller (IPFC) in a power system network. Here both conventional and non conventional optimization tools such as LR and ABC are applied. This methodology is formulated mathematically based on installation cost of the FACTS device and active power generation cost. The capability of IPFC to control the real and reactive power simultaneously in multiple transmission lines is exploited here. Apart from locating the optimal position of IPFC, this algorithm is used to find the optimal dispatch of the generating units and the optimal value of IPFC parameters. IPFC is modeled using Power Injection (PI) model and incorporated into the problem formulation. This proposed method is compared with that of conventional LR method by validating on standard test systems like 5-bus, IEEE 30-bus and IEEE 118-bus systems. A detailed discussion on power flow and voltage profile improvement is carried out which reveals that incorporating IPFC into power system network in its optimal location significantly enhance the load margin as well as the reliability of the system.
Źródło:
Archives of Electrical Engineering; 2013, 62, 1; 91-110
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power flow controller based on bipolar direct PWM AC/AC converter operation with active load
Autorzy:
Kaniewski, Jacek Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/141487.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power flow controller
direct AC/AC converter
matrix chopper
power quality
Opis:
The uncontrolled power flow in the AC power system caused by renewable energy sources (restless sources, distributed energy sources), dynamic loads, etc., is one of many causes of voltage perturbation, along with others, such as switching effects, faults, and adverse weather conditions. This paper presents a three-phase voltage and power flow controller, based on direct PWM AC/AC converters. The proposed solution is intended to protect sensitive loads against voltage fluctuation and problems with power flow control in an AC power system. In comparison to other solutions, such as DVR, UPFC, the presented solution is based on bipolar matrix choppers and operates without a DC energy storage unit or DC link. The proposed solution is able to compensate 50% voltage sags, in the case of three-phase symmetrical voltage perturbation, and single phase voltage interruptions. Additionally, by means of a voltage phase control with a range of 60◦ in each phase, it is possible to control the power flow in an AC power system. The paper presents an operational description, a theoretical analysis based on the averaged state space method and four terminal descriptions, and the experimental test results from a 1 kVA laboratory model operating under active load.
Źródło:
Archives of Electrical Engineering; 2019, 68, 2; 341-356
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal power flow with transmission cost solution under bilateral and multilateral transactions
Autorzy:
Bastin Solai Nazaran, J.
Selvi, K.
Powiązania:
https://bibliotekanauki.pl/articles/141690.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
SEOPF
ESCOPF
power flow tracing
severity index
HGO
bilateral
multilateral transactions
Opis:
In a deregulated electricity market, it is important to dispatch the generation in an economical manner and to ensure security under different operating conditions. In this study evolutionary computation based solution for optimal power flow is attempted. Social welfare optimization is taken as the objective function, which includes generation cost, transmission cost and consumer benefit function. Transmission cost is calculated using Bialek’s power flow tracing method. Severity index is applied as a constraint to measure the security. The objective function is calculated for pre and post contingency periods. Real power generations, real power loads and transformer tap settings are selected as control variables. Different bilateral and multilateral conditions are considered for analysis. A Human Group Optimization algorithm is used to find the solution of the problem. The IEEE 30 bus system is taken as a test system.
Źródło:
Archives of Electrical Engineering; 2014, 63, 2; 227-245
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja zbocznikowania dławikiem przesuwnika fazowego na granicy polsko-niemieckiej
The concept of shifting with the induction coil of the phase shift transmitter at the polish-german border
Autorzy:
Szubert, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2031418.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
FACTS
PST
IPC
sterowanie przepływem mocy
zakłócenia
power flow control
disturbance
Opis:
W artykule przeanalizowano wpływ sterowników FACTS (PST oraz IPC) na pracę połączenia transgranicznego Polska-Niemcy. Stwierdzono, że przesuwnik fazowy PST spełnia podstawowe wymagania i tylko w niewielkim stopniu wpływa na automatykę zabezpieczeniową. Jego rozbudowa do układu międzyfazowego sterownika mocy IPC umożliwiłaby dodatkowo odcięcie się od zakłóceń pochodzących z niemieckiego systemu, jednakże wymagałaby istotnych zmian w automatyce zabezpieczeniowej.
Unplanned energy flow from Germany via Poland to the Czech Republic caused overheating of transmission lines in the west of our country. In order to prevent the necessity to switch off these lines, phase shift transformers (PST) were placed on the border. However, the German system is highly saturated with wind electricity and therefore difficult to steer, which makes it a source of interference for neighbouring countries. The article analyses the impact of flexible AC transmission system (FACTS) drivers on the operation of the Poland-Germany cross-border electrical connection. It was found that the PST meets the basic requirements and has only a slight influence on the protection automatics. Expanding it to the interphase power controller (IPC) would additionally cut off the interference from the German system, however, it would require profound changes in the protection automatics.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2021, 73; 57-60
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 93

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