Sub-module differential power processing photovoltaic optimizer using self-adjusted time-sharing maximum power point tracking control strategy

摘要

Differential power processing (DPP) has demonstrated its significant advantage of high system efficiency for photovoltaic (PV) applications especially in mismatch conditions. In this paper, a sub-module DPP based PV optimizer using a self-adjusted time-sharing maximum power point tracking (MPPT) control strategy is proposed, which can achieve fast and accurate tracking of all sub-modules' maximum power points (MPPs) with only one MPPT controller, facilitating system integration and largely reducing system cost and conversion loss. The effectiveness of the proposed solution is verified by both simulation and experiments.