Implementation of Distributed Power Flow Controller to Improve Power Quality for 220KV Transmission Line
In the last few decades the usage of electric power is increasing day by day, the operation of power systems has become complex due to growing consumption and increased number of non-linear loads because of which compensation of multiple power quality issues has become a compulsion. Hence the power companies are concentrating not only on quantity of the power but also the quality of the power with increase in complexity in system. Here the new component within the flexible AC-transmission system (FACTS) family, called distributed Power-flow controller (DPFC) is presented in this paper. The main power quality problems like voltage sag and swell are studied in this paper. The DPFC is modified from UPFC, by eliminating common DC link between series and shunt converters from UPFC. The three-phase series converter is split into number of single-phase series distributed converters through the line. The active power is exchange between the series and shunt converter at third harmonic frequency through transmission line in DPFC.
The 220KV transmission line from Bhusawal to Dhule is taken for study. The model of transmission line with and without DPFC is modelled in MATLAB/Simulink. From the model, it is seen that the power quality improved with the help of DPFC with higher controllability and reliability compare to other FACTS devices.