“…The details of RES are [14], artificial bee colony (ABC) tuned PID [16], bacterial swarm optimization (BSO) tuned fractional order PID (FOPID) [20], SOS algorithm tuned PIDN [22], hybrid differential evolution-PSO (hDE-PSO) tuned FPID [33] and jaya algorithm (JA) tuned FPIDN [35] controllers. The inspection of Figure 6(a-c [14], ABC PID [16], BSO FOPID [20], SOS PIDN [22], hDE-PSO FPID [33] and JA FPIDN [35] control schemes from least ISE (1.07 × 10 −7 ), ITSE (3.32 × 10 −8 ), IAE (0.0006), ITAE (0.0015), T S (∆F 1 = 0.11 s, ∆F 2 = 0.35 s, ∆Ptie 12 = 0.36 s) and U S (∆F 1 = −0.0010 Hz, ∆F 2 = −0.00013 Hz, ∆Ptie 12 = −0.000130 puMW) point of view. Fascinatingly, this observation is not being raised in the corresponding literature that is, in [3] and hence, it establishes a literature gap.…”