Efficient MPP Tracking of Photovoltaic (PV) Array Through Modified Boost Converter With Simple SMC Voltage Regulator

Sliding mode controller (SMC) based MPPT systems are less effective due to input
LC_in
tank of boost converter. The
LC_in
tank at PV node creates the sinusoidal waves of
V_pv
/
I_pv
, due to which phase angle (
φ
) occurs between triangular wave of inductor current (
I_L
) and sinusoidal
V_pv
. This creates the adverse effects on SMC operation. In this research work, a series capacitor based boost converter is developed without using the parallel
LC_in
circuit. Consequently,
V_pv
/
I_pv
becomes triangular (pure/semi) and
φ
factor between
V_pv
and triangular
I_L
is minimized. The proposed setup ensures a high frequency operation and better voltage regulation of SMC. Through theoretical, mathematical and experimental studies, the response of PV source with conventional converter and proposed converter have been analyzed. Finally, extensive simulation studies and experimental evidences are presented, which highlights the superior dynamic and steady efficiencies of PV system with proposed topology as opposed to conventional converter and other recently developed MPPT systems.