OPTIMAL MULTI-STAGE FUZZY PID BUNDLED PSOTVAC IN MULTI-MACHINE ENVIRONMENT

In this paper presents a new strategy based on Multi-Stage Fuzzy (MSF) PID controller is proposed for damping Power System Stabilizer (PSS) in multimachine environment. In the proposed strategy finding the parameters of PID controller is same as an optimization problem which is based on Particle Swarm Optimization with Time Varying Acceleration Coefficient (PSOTVAC). Thus, to reduce the design effort and find a better fuzzy system control, the parameters of proposed controller is obtained by PSOTVAC that leads to design controller with simple structure that is easy to implement. The effectiveness of the proposed technique is applied to Single machine connected to Infinite Bus (SMIB), IEEE 3-9 buses power system. The proposed technique is compared with other techniques through ITAE and FD which demonstrate the robustness of the proposed technique.