Paper presented to the 3rd Southern African Solar Energy Conference, South Africa, 11-13 May, 2015.
Photovoltaic systems, despite their 40 % annual growing
over the 10 last years, have yet high initial installations costs.
There are oversizing problems and storage difficulties inherent
of isolated systems. For interconnected systems, the islanding is
still the main challenge. This work proposes the use of a "backto-
back" converter that allows the improvement of the sun's
energy, especially in localities where the distribution network is
intermittent. The proposed configuration enables the operation
of photovoltaic systems in three different operation modes at the
point of maximum power and a smooth transition between
modes without the need of batteries for storage. Simulation
results in PSCAD/EMTDC are presented to prove all the
functionality of the proposed configuration.