Novel fixed frequency predictive hysteresis maximum power point tracking control for photovoltaic applications

A novel Maximum Power Point Tracking (MPPT) control for Photovoltaic applications is proposed in this paper. The proposed control algorithm is two-stage control system. The first stage is a Modified Incremental Inductance (MIC) algorithm and the second stage is based on Fixed Frequency Predictive Hysteresis Control (FFPHC). The purpose of the MIC stage is to generate the required reference current that achieves the maximum power. And the function of the FFPHC is to force the system to track that reference. The proposed control algorithm has some inherent features such as ability to achieve maximum power even in case of rapid environmental changes, ability to achieve maximum power in case of partial shading. Operation of predictive hysteresis control at fixed frequency gives the advantages of better power stage parameters design and enables controlling the switching losses.