摘要 :
This article presents a new approach to design reliable controllers acting on the excitation and governor of a synchronous alternator. The usage of a power system stabilizer is inevitable for the enhancement of dynamic stability o...
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This article presents a new approach to design reliable controllers acting on the excitation and governor of a synchronous alternator. The usage of a power system stabilizer is inevitable for the enhancement of dynamic stability of power grids. The suggested reliable power system stabilizer ensures stability either when both controllers are sound or when one of them fails. A redundant feedback controller is designed using particle swarm optimization to achieve a desired degree of stability whether or not the main controller is responding. The design of the redundant controller is based on minimizing an eigenvalue-based objective function using particle swarm optimization. A single-machine infinite-bus system is considered to demonstrate the functionality of the proposed fault-tolerant controller. Results of the eigenvalue analysis reported in the present article show the effectiveness of the proposed power system stabilizer under different loading conditions. The approach is extended to consider reliable stabilization for multi-machine systems where the designed controller could successfully stabilize the system with sound operation as well as under control channel failure.
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摘要 :
Power systems are subjected to severe repetitive oscillations that might cause generator shaft fatigue and, consequently, breakdown. In this article, we consider the problem of designing a power system stabilizer that alleviates g...
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Power systems are subjected to severe repetitive oscillations that might cause generator shaft fatigue and, consequently, breakdown. In this article, we consider the problem of designing a power system stabilizer that alleviates generator shaft fatigue through the minimization of the maximum overshoot. Moreover, through our design, the levels of control signal, as well as controller parameters, have to be maintained within certain bounds imposed by physical and practical considerations. In this respect, a technique based on the particle swarm approach is proposed to identify the parameters of a fixed structure lead compensator through the solution of a min-max problem while satisfying systems constraints. To enhance the overall performance of the system under wide loading conditions, a set of operating points is considered within our approach. The proposed power system stabilizer is applied to a single-machine infinite-bus system at different loading conditions, and the results showed the effectiveness of the developed approach.
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摘要 :
Let C be the curve constructed using the 4- point scheme on an initial control point set S. We prove that, in general, C is not invariant under any refinement of S except the refinement by one or more steps of the 4-point scheme i...
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Let C be the curve constructed using the 4- point scheme on an initial control point set S. We prove that, in general, C is not invariant under any refinement of S except the refinement by one or more steps of the 4-point scheme itself. We outline the proofs of similar results holding for more general interpolatory subdivision schemes.
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