The operation of a unified power quality conditioner (UPQC) as a universal active power conditioning device to minimise both current and voltage distortions at the distribution end of a power system network is described in this study. The UPQC is made up of a common DC link capacitor shared by a series active power filter (DVR) and a shunt active power filter (DSTATCOM). A fuzzy logic controller controls the series compensator, which is used to restore voltage. The operation of the shunt compensator is controlled by extracting d axis and q axis current from load current and maintaining DC link voltage with a fuzzy logic controller. The speed and accuracy with which compensating signals are generated determines how well UPQC performs. Simulation findings are used to investigate the steady state and dynamic behaviour of the control circuit under various load current and/or utility voltage situations. With a fairly simple control circuit setup, the described technique offers an adequate dynamic response. An induction motor load is used to test the planned UPQC. Under these load situations, it can reduce voltage sag/ swell, reactive power adjustment, voltage fluctuations, harmonic elimination, and so on. UPQC simultaneously and independently mitigates voltage and current-based distortion. MATLAB/simulink is used to validate the proposed system and controller. The simulation results show that the THD is low and that the compensation is perfect.
Author(s) DetailsR. Senthil Kumar
Department of Electrical and Electronics, SNS College of Technology Coimbatore, India.
C. Vivekanandan
Dr.NGP Institute of Technology Coimbatore, India.
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