Performance Study of UPQC under Non-linear 1oad, Unbalance linear 1oad, Symmetrical and Asymmetrical Faults

In this paper, the performance of a Unified Power Quality Conditioner (UPQC) is studied under nonlinear and unbalanced linear loads and also during symmetrical and asymmetrical faults. Two control schemes are used to regulate the UPQC. One of the control schemes are used for injecting/absorbing the requited amount of voltage into/from the line to maintain rated voltage during voltage sag/swell conditions whereas other is used for injecting current into the line to reduce harmonics during non-linear loads. Simulation is done using MATLAB/Simulink software and simulink results are analyzed.