Integrating renewable energy resources especially
photovoltaic systems with microgrids has become an
unavoidable choice for most countries and in Egypt the
government has this ambition to reach a percentage of 20% of
the total national electricity generation from solar energy.
Which in turn bring some challenge to the electrical utility
operator. In this paper a practical investigation of Grid
Connected Photovoltaic System on the Total Harmonics
Distortion (THD) on a sample low distribution network is
applied on a case study tested during spring and summer
seasons. The results are also demonstrated by determining the
THD versus the photovoltaic load flow to the connected grid.
Moreover, two solutions for power quality improvement are
suggested. The first is based on switching at very low current
flow conditions and the second is based on adding filters to the
system. Finally, the two proposed approaches are implemented
using MATLAB Simulink simulation and are compared for their
efficiency and applicability. |
