Results 121 to 130 of about 1,103 (164)
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Effect of Casting Parameters on Porosity in LFC
Applied Mechanics and Materials, 2011Cast aluminium alloys often contain microstructural defects resulting from the casting process such as porosity. Developments of Lost foam casting (LFC) process is considered as one of the most rapid in casting technology owing to its unique advantages on energy savings and capabilities to produce castings with thin sections.
Izman, Izman +2 more
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Decentralized ADRC for LFC in Deregulated Environments
International Journal of Engineering Practical Research, 2015Active disturbance rejection control (ADRC) method is investigated in this paper to design decentralized load frequency controllers (LFC) for deregulated multi‐area power systems. ADRC can treat the connections among control areas and the effects of possible contracts as new disturbance signals, and uses an extended state observer (ESO) to estimate and
Hong Zhou, Yuchun Hao, Wen Tan
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Proceedings of IEEE TENCON '98. IEEE Region 10 International Conference on Global Connectivity in Energy, Computer, Communication and Control (Cat. No.98CH36229), 2002
The present work deals with the reduction of a two area non-reheat turbine's 7/sup th/ order model into lower order. The large order model may not be possible to tune and control on-line on a real time basis. It is, therefore, necessary to reduce the model of the 7/sup th/ order system into a lower dimensional model, which can be handled and tuned ...
P. Kumar, P. Varshana, J.K. Das
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The present work deals with the reduction of a two area non-reheat turbine's 7/sup th/ order model into lower order. The large order model may not be possible to tune and control on-line on a real time basis. It is, therefore, necessary to reduce the model of the 7/sup th/ order system into a lower dimensional model, which can be handled and tuned ...
P. Kumar, P. Varshana, J.K. Das
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A PRACTICAL DECENTRALIZED LFC SYSTEM WITH GENERATION RATE LIMIT
IFAC Proceedings Volumes, 1989Abstract This paper presents a decentralized suboptimal LFC method based on output feedback control. In the proposed method, a centralized LFC system by optimal state regulator is first decomposed into a set of suboptimal LFC systems on the assumption that each subsystem can use the frequencies of adjacent areas.
H. Sasaki +3 more
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Decentralized LFC tuning for power systems with communication delays
IEEE ICCA 2010, 2010Decentralized load frequency control (LFC) for multi-area power systems with communication delays is studied in this paper. The TDF-IMC-PID tuning method is adopted to handle the constant delays. A method to analyze the stability of a multi-area power system with communication delays under a decentralized LFC is derived by accounting the inherent ...
Wen Tan 0004, Mei Yu 0003, Hongxia Zhang
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Countable Closed LFC-Groups with p-Torsion
Transactions of the American Mathematical Society, 1993In the development of researches due to F. Hoag and the author existentially closed groups in the class \(LFC_ p\) of all locally \(FC\)- groups with \(p\)-primary torsion subgroups are studied. These groups are closed in \(LFC_ p\) and there are \(2^{\aleph_ 0}\) such countable groups.
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An adaptive IMC-MPC controller for improving LFC performance
2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia), 2017Load frequency control becomes one of the important parts in a power system since frequency deviation is a crucial issue in power system stability. This paper proposed a new IMC controller by combining an adaptive model with MPC controller. A three area power system is chosen to test this controller.
Adelhard Beni Rehiara +4 more
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<ul><li>L’impact du changement climatique sur la dynamique des populations de la TBE</li><li>SCANFI : une nouvelle approche de cartographie des forêts canadiennes</li><li>Évaluer les impacts des feux de végétation sur les bâtiments résidentiels</li><li>Pratiques de santé en forêt : Des représentations ...
Y. Boulanger +5 more
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Y. Boulanger +5 more
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LFC on Screen Printed Aluminium Rear Side Metallization
2009In this paper we report about first results regarding laser fired contacts (LFC) on an optimized screen printed aluminum rear side layer and compare it with our “standard” LFC procedure on evaporated aluminum layers. First of all, the influence of the laser pulse energy, pulse duration and amount of pulses on the resistance of one contact is evaluated.
Nekarda, Jan +6 more
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Single and two area LFC using RBF
2015 International Conference on Recent Developments in Control, Automation and Power Engineering (RDCAPE), 2015The control of operating frequency is of utmost importance in the power system operation and control from stability point of view. Conventionally load frequency control is done by employing PI controllers. Immediate control of system frequency oscillation is very vital to avoid hazardous conditions.
Sayari Das, Devesh Shukla, S. P. Singh
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