Quantifying the Energy Extracted from Thin-Film PV Array Using a Multiple-Stage HF Boost Control Integrated LF-Transformer-Less Grid Tie Inverter

Abstract

A photovoltaic grid tie inverter (GTI) requires sophisticated controls to fed power to the grid with appropriate synchronization. In maximum cases, bulky inefficient iron core transformers are being used for voltage boost up operation. For efficient, compact, and cost-effective design, HF switching can be implemented in the inverter operation. An advanced digital signal processor to generate the SPWM signal based GTI with DC-to-DC boost converter is presented in this article. The converter maintains maximum power point tracking (MPPT). The inverter proposed lacks an interstage LF transformer. Consequently, the decrease in magnetizing and copper losses expands the system and improves its dependability. Simulations and prototype testing with a 1kW PV array proved the performance of the proposed system.