Advanced Power System Stabilizer for a Single Machine - Infinite Bus Model: Transient Analysis

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Abstract
This paper considers tuning of a two-stage lead-lag power system stabilizer (PSS) for Al Sarir west power plant (SWPP) which is operated by General Electricity Company in Libya. The considered power plant has been modeled as a single machine infinite bus configuration. The model has been developed using MATLAB/Simulink and validated through NEPLAN package. The proposed PSSs are fundamentally designed to damp out the low frequency oscillations, consequently this research considers several techniques to find out the most appropriate tuning algorithm in the sense of an accepted overshoot and small settling time. The article exploits Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) to find the required tuning parameters. The optimization of the PSS parameters are calculated in order to enable the PSS to provide a significant damp action to the local area mode of oscillations that occur in power systems as consequences of disturbances including a three phase short circuit at the infinite bus. Fuzzy Logic Control (FLC) is also considered in this work, where two-stage of optimization is examined in this article. The superiority of the proposed techniques are judged through an integral square error (ISE) and Integral Absolute Error (IAE) performance indices.

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