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Performance Enhancement of UPQC Using Multi-Loop Control Scheme

Rama chandraprabhu A, Padhmanabhaiyappan S

Power quality has become an important issue nowadays for several reasons, e.g. modern society’s growing dependence on electricity and the fact that poor power quality may generate significant economic losses in few moments. Probable power quality problems are, e.g. harmonics, flicker, voltage dips and supply interruptions. The power quality may be improved by using filters and compensators. Custom Power (CP) devices that mitigate these power quality problems have gained more attention in the recent decades. Unified Power Quality Conditioner (UPQC) is one of the CP devices whichmitigates both load current and supply voltage problems simultaneously. In this paper the development of UPQC with transformer less cross phase connected UPQC has been implemented. The control strategy incorporated is much similar to Dynamic Voltage Restorer (DVR).This scheme was found beneficial and the simulation (using MATLAB/SIMULINK) results prove that the voltage and current control was found good and the harmonics in the system were also reduced.