Single Phase Shunt Active Filter Interfacing Solar PV Array

The active power filter implemented with a voltage source inverter is connected with the load, and the combined filter and load then draws a sinusoidal current from the ac source. The shunt active power filter is considered as a controllable current source to supply the equal but opposite harmonic current and reactive current drawn from the non-linear loads such that the ac source only supplies the fundamental active current to the loads. There are many control techniques available for shunt active power filter. The solar array is used as the source of the filter and the reason for choosing solar source because it is easy to harvest, pollution free and vast energy present around the world. So the solar energy is connected with filter and inject the power to the grid. In this project, shunt active power filter based on PQ theory is implemented. The principle of filter is that the combination of non linear load and the filter is made to be PQ theory by means of controlling the duty ratio of the filter. The simulation results of this filter are carried with well known PQ theory for unbalanced load, where the single phase load is treated as an unbalanced load. Finally, conclusions are duly drawn.