Abstract
In this paper a robust fractional order fuzzy proportional integral derivative (FOFPID) based SVC is proposed for regulating the voltage profile of single machine infinite bus (SMIB) and multimachine power systems (MMPS). The proposed FOFPID controller produces the required control signal to minimize the low frequency oscillations during transient conditions. Further, in order to improve the controller performance, the gains of FOFPID controller are tuned using bat algorithm (BA), bacterial foraging optimization (BFO) and particle swarm optimization (PSO) technique. The proposed technique improves the voltage profile and also minimizes settling time and peak overshoot during different operating conditions. Further, a comparative analysis of the proposed controllers is presented to augment the stability enhancement study. It has been observed from the qualitative as well as quantitative results that oscillations are being damped out quickly in case of the proposed BAFODPID-SVC as compared to BFO-FOFPID-SVC and PSOFOFPID-SVC controller in both SMIB and multimachine power system and thus improving the voltage profile under various operational contingencies.
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