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A Modified UPQC Topology Using Fuzzy Based Control of VSI with Reduced DC Link Voltage Rating

Jegatha.L , Sathishkumar R

A custom device that mitigates simultaneously the voltage and current concerned Power Quality issues in the power distribution systems, is the unified power quality conditioner (UPQC). This paper presents a modified UPQC topology for three-phase-four wire system. The proposed topology helps in matching the DC-link voltage necessity of shunt and series inverter at reduced rating, without any compromise in the performance. The performance of modified UPQC topology using PI and fuzzy controller has been studied comparatively. The effectiveness of the proposed system is verified using the MATLAB simulations.