Novel FLC Based DPFC to Improve the Grid Connected Device Power Quality

Abstract

n this paper we propose a novel digital controller like FLC based DPFC to improve the power quality and harmonics reduction capability. Generally power quality problems like voltage Dip, swells and harmonics these issues are affecting the system stability. The DPFC device is similar to UPFC but eliminating DC-interface. But always DC bus is used for exchanging the real powers between back to back converters of UPFC but in our proposed method that function is achieved by using 3rd harmonic content in the system. The performance of the system is conduct in MATLAB/simulink environment.

Keywords- Fuzzy logic controller (FLC), sag, swells, harmonics, Distributed Power Flow Controller (DPFC).