Results 261 to 270 of about 699,235 (311)
Some of the next articles are maybe not open access.
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.
openaire +1 more source
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
openaire +1 more source
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.
openaire +1 more source
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.
openaire +1 more source
Unified PID design for load frequency control
Proceedings of the 2004 IEEE International Conference on Control Applications, 2004., 2005This work presents a new PID controller for power system load-frequency control. A systematic tuning method is developed. The method is mainly based on a maximum peak-resonance specification that is graphically supported by the Nichols chart. The proposed controller is simple, effective and can ensure that the overall system performance is desirable ...
Amin Khodabakhshian, Navid Golbon
openaire +1 more source
Load frequency control incorporating time delay
Proceedings of the IEEE, 1987This letter discusses a load frequency control scheme incorporating the computation delay time in the control law. When there is a computation delay in determining feedback gains, the incorporation of the time delay is necessary for the improvement of dynamic responses. The influences of the delay time on the responses are investigated using a two-area
Kenji Okada +2 more
openaire +1 more source
Review of Various Load Frequency Controllers
2021In a power system, various fluctuations can occur in voltage and frequency due to the disturbances and sudden changes in the load (due to load change or fault). Whenever there is a change in the load, voltage and frequency get affected/disturbed. Voltage regulator is designed to compensate the voltage fluctuations and to compensate or maintain the ...
Alok Kumar +3 more
openaire +1 more source
[Proceedings 1992] The First IEEE Conference on Control Applications, 2003
A technique for the control of frequency deviation in interconnected power systems is introduced. The technique is based on the application of linear feedback H-infinity robust controllers in the power system model. The controller response should be fast enough to offset the frequency errors due to load variations.
openaire +1 more source
A technique for the control of frequency deviation in interconnected power systems is introduced. The technique is based on the application of linear feedback H-infinity robust controllers in the power system model. The controller response should be fast enough to offset the frequency errors due to load variations.
openaire +1 more source
Application of Neural Networks to Automatic Load Frequency Control
Proceedings of The 2014 International Conference on Control, Instrumentation, Energy and Communication (CIEC), 2013The first theoretical analysis on PI controllers dates back to 1910. Even though the speed of response and overall stability of the system is slow, PI controllers are still used today. On the contrary, twenty first century customers, aware of power quality standards, demand faster response and very small settling.
Soumyadeep Nag, Namitha Philip
openaire +1 more source
Control of load, frequency, and time of interconnected systems
Electrical Engineering, 1945The general problem is stated and typical solutions indicated. Characteristics of governors and of frequency- and load-control devices are briefly explained, and effects on generator and tie-line loads are summarized. Illustrating the principles enunciated, interconnected systems in southern Ontario and adjacent portions of Quebec totaling 1,650,000-kw
openaire +1 more source
Load Frequency Control: A Polar Fuzzy Approach
2011The Performance of a Fuzzy logic controller is limited by its large number of rules and if the rules are large then computation time and requirement of memory is large. This problem is compensated by using Polar Fuzzy logic controller. So a Polar Fuzzy logic controller is proposed for the load frequency control problem.
Rahul Umrao +2 more
openaire +1 more source