This dissertation characterize the Automatic Generation Control (AGC) knit together with tandem reheat and cross reheat thermal system wielding Proportional Integral (PI) and Fuzzy Logic Controller (FLC). Multi area thermal system is designed with non-linearities such as governor dead band in addition with generation rate constraint. This study is come up with a knowledgeable application of Redox flow batteries (RFB) correlative along Static Synchronous Series Compensator. In order to enhance dynamic reaction of the load frequency control, redox flow battery has been appended in couple of the units as a result of being active rejoinder and nether time persistent. Ziegler Nichols method is wielded to regulate the PI controllers. During enormous load distraction within areas, conventional control methods alone would be ineffective in diminishing frequency deflection and power of tie-line swinging as a result of medium reaction by speed governor process. In order prevail this hindrance; fuzzy logic controller has been executed within the plant. Simulation studies affirm the efficacy of the fuzzy logic controller, depends upon the parameters like overshoots, under shoots and settling time, hence AGC functioning during abnormality in power system has been ameliorated. System is also studied for hydro thermal power system with simulation outcome.

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