Harmonic compensation using D-STATCOM in combination with Renewable Energy Sources to enhance power quality

In this paper, distribution static compensator is used to compensate the source currents which are affected by the harmonics due to unbalanced and non-linear loads. Here a PV based inverter is used as a shunt active power filter to mitigate the current harmonics. The theory of synchronous reference frame is used to generate the three phase reference currents. Hysteresis current controller (HCC) is used to generate the switching pulses for the gate drives of the grid interfacing inverter. The inverter act as a shunt active power filters to inject the compensated current to the system. The total harmonic distortion (THDs) of the source currents are reduced by using shunt active power filter (APF). The THDs of the distribution system with and without APF are compared. The whole work is been done in MATLAB/SIMULINK.