Enrichment of Voltage Profile in Secondary Distribution System using DVR

The power quality issues affect customers directly or indirectly in terms of economic losses due to the equipment damage, process interruption, production loss, data loss, wastage of material etc. Different kinds of techniques have been utilized over the years in industry to compensate voltage unbalance along electric power distribution networks such as booster transformers, series capacitors, shunt reactors, and most recently Volt-VAR reactive power compensation, phase rearrangement, phase balancing between specific medium voltage feeder and the power distribution energy converter banks with a radial arrangement system. Hence, the simple, effective and cheapest device for voltage profile correction in distribution network compared to other custom power devices is the dynamic voltage restorer (DVR). A DVR is connected between the secondary distribution transformer and the customer load along a feeder with a radial arrangement. An innovative new design-model of the DVR has been proposed and developed using dq0 controller and the proportional integral (PI) controller method. Model simulations were carried out using MATLAB/Simulink in Sim Power System tool box.