Harmonic Mitigation of Fluctuating Non Linear Load in a Grid connected Photovoltaic system
Keywords:Photo Voltaic, Power Quality, Shunt Active Filter, Synchronous Reference frame.
This paper presents improvement in power quality in a grid connected with non conventional energy source
and nonlinear load. Three phase shunt active filter is proposed for improvement in power quality. Harmonic are declining power
quality which is to be filtered. Present day energy demand is very high and conventional energy sources are costly and pollute
environment. Renewable source of energy are emerging with new technology. This paper presents the model of PV panels
connected with voltage source inverter, which are stepped up by transformer and is fed to the grid.
Here Shunt active filter is implemented with voltage source inverter and dc link capacitor. Synchronous reference frame
method is implemented for current control in shunt active filter. Filter can efficiently respond to sudden change in load is
depicted in this paper. THD is not much affected with sudden change in load. Active power transfers from PV connected inverter
to the grid through transformer.