Design and Implementation of Fuzzy Logic Controller cum Hysteresis Current Controlled STATCOM for Improving Power Quality

Objectives: In this paper, we propose a new hybrid controller, Fuzzy Logic Controller (FLC) cum Hysteresis Current Controlled (HCC) Static Compensator (STATCOM) for enhancing the power quality. Methods/Statistical analysis: The DC link capacitor voltage of VSI is manipulated by the FLC and the HCC is used to modify the shape the source current such that it is in-phase with the input voltage. Findings: The output results of THD across single phase and three phase power system without STATCOM are 71.75% and 18.06%. In this proposed work different control schemes and loads are considered e.g, FFT analysis output of Single phase with STATCOM (PI cum HCC, R-L load) = 6.49%, (PI cum HCC, R-C load) = 8.58%, (FLC cum HCC, R-L load) =2.92%, (FLC cum HCC, R-C load) = 3.12%. Three phase with STATCOM (PI cum HCC, R-L-E load) =14.65 %,( FLC cum HCC, R-L-E load) =9.18%. Application/Improvements: In single phase system and three phase system, FLC cum HCC shows better performance compared to other methods and model is verified by using MATLAB/Simulink.