Stability improvement in power system integrated with WECS using dolphin echolocation optimized hybrid PID plus FLC-based PSS

Abstract

This paper focuses on the stability study of power system integrated with wind energy conversion system (WECS) under various operating conditions. Being a stochastic variation in the input wind speed, WECS affects the stability of the power system. Hence, a hybrid proportional-integral-derivative plus fuzzy logic controller (hPID plus FLC)-based power system stabilizer (PSS) is adopted for improving the stability in single machine infinite bus (SMIB) power system under different operating conditions. The parameters of the proposed hPID plus FLC are optimized using dolphin echolocation optimization (DEO) technique. Several investigations are carried out for assessing the superiority of the proposed technique. It is evident from the graphical as well as the quantitative comparative results using integral of time multiplied absolute error (ITAE), maximum overshoot and the settling time that the proposed DEO tuned hPID plus FLC gives much better performance over GWO and PSO tuned hPID plus FLC controllers.