PV solar system with series output connection and MPPT control

Photovoltaic solar systems with Module Integrated Converters (MICs) that are connected in series are getting more attention for the ability to create high output voltage while performing Maximum Power Point Tracking (MPPT) function for individual solar panels. Conventionally, MPPT controller is utilized for each solar panel or channel in this in series connection architecture, which results in cost increase. This paper presents a series-output-connection MPPT (SOC-MPPT) controller for multiple solar panels using a single current sensor and a single digital controller. It is suited when the load is constant voltage (e.g. battery) or is resistive. The proposed controller is investigated based on boost type MICs. Experimental results under steady-state conditions and transient conditions are presented to verify the performance of the proposed controller.