Results 111 to 120 of about 289,373 (163)
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Estimation and Prediction in Load frequency Control
2007 International Conference on Power Engineering, Energy and Electrical Drives, 2007Many controllers designed for load-frequency control (LFC) in power system are based on the knowledge of system state, which is generally not measured. This paper presents a method for estimation of disturbance and system state in LFC. In power systems, measurement signals and control signals are transmitted over long distances between controller and ...
Petrović, Ivan +2 more
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Digital Load Frequency Control
2020 6th IEEE International Energy Conference (ENERGYCon), 2020Frequency of power supply system needs to be kept constant or fixed irrespective of the varying changes in load demand in order to ensure the well-being of power generating equipment and delivery of good quality power at the demand side. This paper presents an enhanced digital PD controller for Load Frequency Control (LFC) of UAE power system based on ...
Mekonnen Shewarega, Abdulla Ismail
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Provision of Load Frequency Control by PHEVs, Controllable Loads, and a Cogeneration Unit
IEEE Transactions on Industrial Electronics, 2011This paper presents a method for tracking a secondary frequency control (Load Frequency Control) signal by groups of plug-in hybrid electric vehicles (PHEVs), controllable thermal household appliances under a duty-cycle coordination scheme, and a decentralized combined-heat-and-power generation unit.
Matthias D. Galus +2 more
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Load-frequency control service in a deregulated environment
Decision Support Systems, 1999In a deregulated environment, independent generators and utility generators may or may not participate in the load frequency control of the system. For the purpose of evaluating the performance of such a system, a flexible method has been developed and implemented.
A. P. Sakis Meliopoulos +2 more
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Constrained Load-frequency Control
Electric Power Components and Systems, 2008Abstract Load-frequency control (LFC) is one of the major problems when dealing with the design and/or operation of electric power systems. Moreover, due to practical and physical considerations, bounds are often imposed on the level of control signals as well as the maximum frequency deviation. Control strategies that satisfy systems constraints, and,
M. F. Hassan +2 more
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Advanced Load Frequency Control
IEEE Transactions on Power Apparatus and Systems, 1972The problem of designing a load frequency control law which reduces transient frequency oscillations (swings) and reduces the number of control signals sent to power houses is investigated. A linear model of an area of an interconnected power system is developed, and a discrete time, linear-plus-deadband, feedback control law is designed.
J. Glover, Fred Schweppe
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Decentralised load-frequency control
IEE Proceedings D Control Theory and Applications, 1985Consider an LQ problem: \(\min_{K\in \Omega}J(K)\) subject to \(\dot x=Ax+Bu\), \(y=Cx\), where \(J(K)=0.5\int^{\infty}_{0}x'(Q+K'RK)xdt\), \(\Omega =\{K:\) \(F(K)=0\}\); \(F(K)=K(I-C'(CC')^{-1}C)\), \(F(K)=K- diag\{K_ 1,...,K_ M\}\) for output, decentralised (with M local agents) feedback control, respectively. Two theorems are proved: Suppose \(K+L=R^
Geromel, J. C., Peres, P. L. D.
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An Adaptive Controller for Power System Load-Frequency Control
IEEE Power Engineering Review, 1989An adaptive controller is presented for load-frequency control of power systems. It uses a PI (proportional-integral) adaptation to satisfy the hyperstability condition for taking care of the parameter changes of the system. Only the available information on the states and output are required for the control.
C.-T. Pan, C.-M. Liaw
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Load frequency control system with smart meter and controllable loads
2017 8th International Renewable Energy Congress (IREC), 2017The advances in the network technology and the emergence of the renewable energy as primary sources have changed the current view of the power system control. Smart meters will become a very important component in future power systems. In the event of an emergency the demand will play vital role in the stability of the power system.
Ashraf Khalil, Zakariya Rajab
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INFOR: Information Systems and Operational Research, 1991
AbstractThis paper addresses the design of decentralized controllers for interconnected large-scale electric power systems. The system is modelled as a collection of independent subsystems or control areas interconnected through high voltage tie-lines.
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AbstractThis paper addresses the design of decentralized controllers for interconnected large-scale electric power systems. The system is modelled as a collection of independent subsystems or control areas interconnected through high voltage tie-lines.
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