Water Cycle Optimization Technique-based IDDF Controller for Frequency Regulation of Interconnected Power System with HVDC Line

In this paper, the frequency regulation of two areas' non-linear thermal hydro (TANLTH) system is assessed subjected to the perturbation of 10% step load (10%SLP) on area-1. Integral (I)-double derivative (DD) plus filter (IDDF) is designed using the water cycle optimization technique (WCOT) as a secondary regulator is presented whose efficacy is established with other regulators. However, the IDDF controller tuning with WCOT is performed concerning integral square error (ISE). Moreover, the analysis on TANL TH is executed by believing the realistic constraint of communication time delays (CTDs) for obtaining the analysis close to realistic practice. Further, the T ANL TH is provided with a high-voltage DC line (HVDC) for attaining better dynamical performance.