Submodule Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications

TLDR

The study investigates how integrating submodule MPPTs into solar PV systems can increase energy capture under partial shading and reduce overall costs. The authors implement a high‑efficiency (>98%) synchronous buck MPPT converter directly in junction boxes, using digital control to achieve local and global maximum power extraction. Experimental measurements under real‑world conditions confirm increased energy capture and quantify the architecture’s benefits.

Abstract

This paper explores the benefits of distributed power electronics in solar photovoltaic applications through the use of submodule integrated maximum power point trackers (MPPT). We propose a system architecture that provides a substantial increase in captured energy during partial shading conditions, while at the same time enabling significant overall cost reductions. This is achieved through direct integration of miniature MPPT power converters into existing junction boxes. We describe the design and implementation of a high-efficiency (>;98%) synchronous buck MPPT converter, along with digital control techniques that ensure both local and global maximum power extraction. Through detailed experimental measurements under real-world conditions, we verify the increase in energy capture and quantify the benefits of the architecture.