Design and Implementation of ADE Based Cascade PD-PI Controller for AGC of Multi-area Power System

Abstract

An Adaptive Differential Evolution (ADE) algorithm based cascade PD-PI controller is proposed for Automatic generator controller (AGC) of thermal system. Initially, a two equal area reheat interconnected thermal power system is investigated and gain values of PD-PI controller is tuned by ADE technique employing an Integral of time multiplied absolute error (ITAE) based criteria. The performance result of suggested PD-PI controller is correlated with newly published approaches such as Firefly algorithm (FA) based PI/PID controller for same test model. It is clearly observed that the proposed controller simulation results provide better response compare to published results. Lastly, the robustness of suggested controller is inspected by various time delays (TD), random step load pattern in the system and also evaluated stability analysis in terms of phase margin and gain Margin.

Appendix

$$ \begin{aligned} & P_{ri} = 2000\,{\text{MW}},F = 60\,{\text{Hz}},B_{i} = 0.425\,{\text{pu/MW}},T_{12} = 0.545\,{\text{pu/MW/Hz}},T_{PSi} = 20\,{\text{s}},K_{PSi} = 120\,{\text{Hz/puMW}}, \\ & R_{i} = 2.4\,{\text{Hz/puMW}},a_{12} = - 1,T_{gi} = 0.08\,{\text{s}},T_{ti} = 0.3\,{\text{s}},K_{ri} = 0.5,T_{ri} = 10\,{\text{s}}. \\ \end{aligned} $$