Designing fuzzy logic damping controllers for large practical power systems

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2000

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A methodology for designing fuzzy logic damping controllers for large practical power systems is presented in this paper. The proposed approach uses (i) the Prony Signal & Transfer Function Identification Technique to identify (a) the critical oscillation modes in the system (b) suitable damping control options and feedback signals to improve the damping of critical modes without significantly affecting the other modes; (ii) Pulse Test Response Technique to identify the rule base of fuzzy logic damping controllers. The advantage is that, the proposed approach can be utilized with the practical system or a simulated model of the system. In this paper, this approach is utilized to design fuzzy logic damping controllers for an ac-dc multi-area interconnected system. The system and controllers used in this study are simulated using EMTDC/PSCAD Transient Simulation Software. The simulation results observed reveal that, the proposed approach can be successfully utilized to design fuzzy logic damping controllers for large power systems.

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