Automatic Generation Control of Interconnected Power Systems Using Elephant Herding Optimization

This paper presents load frequency control and dynamic modelling of an interconnected grid of three power system areas, where area-1 consists of a single non-reheat synchronous generator and DFIG wind turbine based hybrid generation, second is synchronous generator power plant with reheat, and the last one consists of hydro turbine based generation unit. The automatic generation control of an interconnected power system is studied by using MATLAB/Simulink for uncertain variations in load demands. A nature-inspired algorithm, i.e. Elephant Herding Optimization (EHO) is applied to mitigate frequency deviations under sudden variations in demand. An objective function based on frequency deviations, tie-line powers is defined for the study. The outcomes of the proposed EHO-based AGC (Automatic Generation Control) are validated and compared with PSO (Particle Swarm Optimization)-based AGC via simulation results on the basis of magnitude of normalized error.