A Novel Transformer Less Grid-Tied Multi Level Boost PV Inverter

Publications

A Novel Transformer Less Grid-Tied Multi Level Boost PV Inverter

Year : 2023

Publisher : Institute of Electrical and Electronics Engineers Inc.

Source Title : 2023 IEEE International Conference on Energy Technologies for Future Grids, ETFG 2023

Document Type :

Abstract

A new grid tied transformerless (TL) inverter for photovoltaic (PV) application has been proposed in this paper which works on the switched capacitor (SC) technique and facilitate four times boosting of input voltage with nine level voltage generation. Therefore, this inverter can be a suitable candidate topology for low voltage single stage grid tied PV applications without any additional need of boosting dc/dc intermediate converter stage. Two SC cells are utilized in such a fashion that PV voltage would boost and facilitate nine levels in output voltage. The optional ac decoupling unit at load end, of this proposed inverter topology maintains constant common-mode voltage during two modes. Consequently, leakage current gets reduced sufficiently. H bridge structure at the back end of this topology provides positive and negative half cycle voltage in the output, thus elimination of extra virtual dc-link capacitors (for generating negative half cycle) helps in increasing the efficiency. The Matlab® simulation and experimental findings demonstrate the efficacy and practicality of this proposed inverter.