Maximum Power Point Tracking of PV Arrays under Partial Shaded Condition using Modified SEPIC Converter

Abstract

To track maximum point (MPP) is a vital part in conversionof energy using photovoltaic (PV) array. When the solar
irradiance is uniform the mostly used conventional maximum power point tracking (MPPT) algorithms are efficient.
But when solar irradiance is in disturbing conditions (partially shaded conditions (PSCs)) cause disturbances in the
current-voltage & power-voltage characteristics for photovoltaic system simultaneously. Mainly, partial shaded
phenomenon had adverse effects on power-voltage characteristics because it contains multiple peaks and steps.
Therefore, the mostly used tracking algorithms fails as an efficient tracking of the real MPP (Global Peak (GP)), &
it confines with the local peak power point that eventually reduces the energy & efficiency of PV system. Hence, to
overcome this condition, a developed MPPT tracking algorithm is designed with P&O Algorithm. This developed
MPPT system is in a position to track the important maximum power pointunderconstant and varying weather
condition. The operation of proposed maximum power pointtracking (MPPT) is analysed and verified by simulations
with the help of MATLAB/ SIMULINK. Further a Modified SEPIC converter is used to get a high static gain & stepup. It is used as the load which gets supplies from series connected PV modules.Utilizing the maximum power from
the PV module is done with MPPT controller.