Performance evaluation of MPPT techniques for PV array incorporated into Electric Vehicle roof

This paper deals with the implementation of a fast, fully integrated Maximum Power Point Tracking (MPPT) algorithm, in order to efficiently control a Photovoltaic (PV) system incorporated into a battery-Electric Vehicle (EV) roof. Major challenges for such PV systems are the rapidly changing irradiance conditions and partial shading of the PV cells. Perturb & Observe (P&O) as well as Incremental Conductance (INC)-based MPPT techniques, employing fixed and adaptive voltage steps, are developed and quantitatively assessed in terms of stability and fast transient response, via convenient dynamic simulation analysis. MPPT algorithm behavior over partial shading conditions is also investigated. In addition, the energy production as well as the enhancement in EV driving autonomy, in yearly basis, for the proposed PV system employing the optimal MPPT technique is computed, utilizing measured solar irradiance data and realistic driving scenaria.