Load Frequency Control Scheme using Inertia Emulation Controlled HVDC Tie-Line

This article highlights the development of a load frequency control (LFC) scheme for a deregulated realistic interconnected power system using inertia emulation controlled (INEC) HVDC tie-line. The realistic secenario of the power system has been developed by inclusion of nonlinearities like rating limitation of generation systems, dead band of governer system and dynamics of boiler. A Proportional-Integral-Derivative controller with derivative filter (PIDN) whose gains are optimized by a successful implementation of Volleyball Premier League (VPL) optimization technique is deployed for secondary level control of LFC scheme. Furthermore, an accurately modelled HVDC tie-line in which the parameters like the capacity of the line, voltage rating and loading conditions are included is utilised along with INEC strategy for this work. The LFC scheme with support of INEC based HVDC tie-line has been justified by comparative analysis of system with and without proposed scheme. The robustness check has been done for the proposed LFC scheme under the case of power system area extension. The overall work has been developed using MATLAB/Simulink Toolbox ®.