Design of a Cell String Level Maximum Power Point Tracking Converter Connected to a DC Grid

The presented research focuses on the design and implementation of a maximum power point tracking (MPPT) system for photovoltaic (PV) panels installed on a sailing yacht. This yacht relies solely on renewable energy sources, particularly solar energy when anchored. The unique challenge addressed is the impact of partial shading on the PV panels due to the yacht's masts and sails. A two-step conversion system is developed, where string-level converters adjust to shading conditions to maintain optimal power output. The isolated converter then steps up the voltage for integration into a bipolar DC grid. Experimental results demonstrate that this system significantly enhances energy yield under varying shading conditions.