Maiden Application of Integral-Tilt Integral Derivative with Filter (I-TDN) Control Structure for Load Frequency Control

Abstract

This study explores an integral minus tilt integral derivative with a filter (I-TDN) control structure for a two-area interconnected hybrid power system. The investigated system includes reheated thermal power plants with stochastic non-conventional energy sources in one control area and hydropower plants in the other. Non-conventional energy sources include wind, solar thermal, and fuel cells. It needs to mention here that the load employed in both control area have stochastic in nature. The comprehensive simulation study shows that the I-TDN control structure outperforms PID and I-PD controllers in terms of the performance index. Sensitivity analysis has been carried out for variation in the system parameters, such as the speed regulation parameter, nonlinearities associated with a reheated thermal and hydropower plant, and random load perturbation, to demonstrate the robustness of the proposed control structure. The simulation results obtained for sensitivity analysis proves the efficacy of the ‘I-TDN’ control structure as a load frequency controller over others in terms of integral time absolute error and performance index.