A modified MPPT algorithm using incremental conductance for constant power generation of photovoltaic systems

Abstract

Nowadays, many solar photovoltaics (PV) are installed in the power grid. Maximum power point tracking (MPPT) method is used to maximize the power in solar PV. However, the power maximum in PV can cause overvoltage in the power grid. Therefore, this paper discusses a modified Incremental conductance (IC) MPPT algorithm for constant power generation (CPG) under fluctuated solar irradiation. This method is combining MPPT with power control adjustment for limiting the maximum feed-in power of solar PV systems. The proposed control strategy will be able to regulate two conditions of solar PV operation, first for MPP operation on under reference power and second for GPG operation on upper reference power. Simulation results of proposed control method have verified for various reference power and irradiance and show high accuracy, stable and fast response.