Differential Power Processing-based Constant Power Generation towards Grid-friendly Photovoltaic System

Abstract

This paper proposes an efficient constant power generation (CPG) control scheme for photovoltaic systems (PV) by utilizing differential power processing (DPP) converters. The conventional CPG approaches will become nearly ineffective for PV modules under partial shading conditions; thus, resulting in propagation of disturbances in high PV penetrated grids. The goal of this paper is to realize a more effective dispatchable PV power generation under partial shading conditions to mitigate wide range of disturbances at the grid-edge. The proposed approach is to leverage DPP converters to improve power harvesting when the PV systems encounter partial shading while ensuring CPG for wide range of PV modules’ condition. Several case studies are presented to demonstrate the functionality of the proposed approach for achieving CPG. The provided comparison between the proposed and state-of-the-art CPG approaches demonstrates promising superiority for realizing grid-friendly PV systems.