Power System Stability by Improved Grasshopper Optimization Algorithm-Based PSS with Type-2 Fuzzy Lead-Lag based SSSC Controller

This article attempted coordinated control of Type-2 fuzzy PSS with type-2 fuzzy lead lag(T2FLL) based SSSC controller for enhancement of transient stability of the power system.The initial step of analysis a single machine infinite bus power system model with LL based SSSC controller and PSS is considered.It is formulated by optimization problem to find out the optimal controller parameters by employing improved Grasshopper Optimization Algorithm (iGOA), GOA, PSO and Genetic algorithm (GA).The proposed test model of Type-2 fuzzy PSS with T2FLL based SSSC controller over PSS with LL controller of the same power system model demonstrated under different fault condition and location of fault with change of loading condition.The second part of analysis to check the effectiveness and robustness of transient stability in multi machine power system (MMPS) uses Type-2 fuzzy PSS with T2FLL based SSSC controller.The proposed MMPS with Type-2 fuzzy PSS with T2FLL controller demonstrated and observed that it is gives the better performances of damping of oscillation as compared to PSS with LL based SSSC controller under different fault condition of the power system.