DC-Link Capacitor Voltage Stabilization of a Shunt Active Power Filter Using Fuzzy Logic Controller Under Dynamic Loading Condition

This paper investigates the performance of shunt active power filter (SAPF) for DC-link voltage (\(V_{{{\text{DC}}}}\)) control under load changing condition. The SAPF is designed using three control methods such as a synchronous reference frame technique for reference current generation, an adaptive hysteresis current controller scheme for generation of switching pulse and fuzzy logic control (FLC) technique for \(V_{{{\text{DC}}}}\) control. The foremost aim of the projected work is to control the \(V_{{{\text{DC}}}}\) of the SAPF during varying load condition and to enhance the harmonics reduction capability. Basically, the \(V_{{{\text{DC}}}}\) of the SAPF deviates during varying load condition and a normal proportional and integral controller fails to control this voltage deviation. Hence, a FLC-based controller is proposed. The simulated model of the planned arrangement is designed and developed using MATLAB. The analysis is carried out on the simulated results to verify the outcomes, and it is also compared with the PI controller-based SAPF model.