Performance Comparison of IDD Controller with SSSC to That with TCPS for Damping Oscillations in AGC

In this paper, a new classical controller called as Integral Double Derivative Controller (IDD) in coordination with Static Synchronous Series Compensator (SSSC) and Thyristor controlled phase shifter (TCPS) is applied for the first time in automatic generation control (AGC) system. Comparative studies on the performance of IDD controller -SSSC and IDD controller -TCPS is carried out for load-frequency control (LFC) of two-area interconnected thermal reheat power system. The study is carried out considering appropriate generation rate constraints (GRC). A new meta-heuristic search algorithm called as Cuckoo Search (CS) is utilized for finding optimal designing parameters using Integral squared error technique (I.S.E). Critical examination of the dynamic responses of area frequency, tie power and generated power reveals that dynamic responses have improved further with the use of SSSC as compared to those with TCPS. It can be observed that the oscillations in area frequency, tie-power and generated power deviations have decreased to a considerable extent as compared to that of the system with TCPS. Further it is evident that IDD controller with SSSC gives far better performance than IDD with TCPS even in higher degree of perturbation in terms of oscillations and settling time.