Load Frequency Control in multi area Power System using different Control Schemes

Power system networks depend on load frequency control (LFC) to maintain load stability. The principal aim of LFC is to regulate generator output in response to fluctuations in tie-line power and system frequencies, encompassing frequency restoration and power exchange with neighbouring areas. This study examines the LFC for a three-area reheat thermal system with generation rate constraints. The results of load frequency have been obtained different controllers like fuzzy cascaded PID, Integral double derivative (IDD), Model Predictive control (MPC) and PID. The Big Bang Big Crunch is employed to enhance the performance of designed controllers except MPC. The controller's responsiveness has been checked using step load perturbation. A comparative study has also been performed on the basis of settling time, overshoot, and undershoot criterion. It is evident form results that the fuzzy cascaded PID controller outperforms other controllers for settling time, except for a few responses that display significant oscillations. Hence, in comparison to other controllers, the fuzzy cascaded PID controller exhibits superior performance in order to keep a balance in generation and load.

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