TY - JOUR
T1 - Novel Step-Up Transformerless Inverter Topology for 1-Φ Grid-Connected Photovoltaic System
AU - Chamarthi, Phani Kumar
AU - El Moursi, Mohamed Shawky
AU - Khadkikar, Vinod
AU - Hosani, Khalifa Hassan Al
AU - El-Fouly, Tarek H.M.
N1 - Funding Information:
Manuscript received July 30, 2020; revised December 31, 2020; accepted February 8, 2021. Date of publication March 17, 2021; date of current version May 19, 2021. This work was supported by the Advanced Power and Energy Centre at Khalifa University, Abu Dhabi, UAE. Paper 2020-SECSC-0848.R1, presented at the 2020 IEEE International Conference on Power Electronics, Smart Grid and Renewable Energy, Cochin, India, Jan. 2–4, 2020, and approved for publication in the IEEE Transactions on Industry Applications by the Renewable and Sustainable Energy Conversion Systems Committee of the IEEE Industry Applications Society. (Corresponding author: Phani Kumar Chamarthi) The authors are with the Advanced Power and Energy Centre (APEC), EECS Department, Khalifa University of Science and Technology, Abu Dhabi 307501, United Arab Emirates (e-mail: [email protected]; [email protected]; [email protected]; khalifa.halhosani@ ku.ac.ae; [email protected]).
Funding Information:
This work was funded by Advanced Power and Energy Center (APEC), EECS Department at Khalifa University. The authors would like to thank APEC for supporting this valuable work.
Publisher Copyright:
© 1972-2012 IEEE.
PY - 2021/5/1
Y1 - 2021/5/1
N2 - In this article, a novel step-up transformerless inverter topology is presented for the grid-connected solar PV system. The proposed topology has the features of a dc-dc step-up converter and two-level inverter. First, it offers the transformerless grid connection of solar PV system with negligible leakage current and higher efficiency, and second, it provides inherent high gain step-up so that low-voltage solar PV modules can be directly connected. In addition, the proposed topology has low-voltage stress, less power losses, and requires fewer independent gate drive signals compared to the other existing transformerless inverter configurations with voltage boosting capability. The design, modes of operation, analysis, and developed PWM strategy, for the proposed inverter topology, are presented in detail. Furthermore, the system performance is validated experimentally through a 400 VA laboratory prototype. The experimental investigation demonstrates that the proposed topology results in transformerless voltage boosting while achieving improved system efficiency.
AB - In this article, a novel step-up transformerless inverter topology is presented for the grid-connected solar PV system. The proposed topology has the features of a dc-dc step-up converter and two-level inverter. First, it offers the transformerless grid connection of solar PV system with negligible leakage current and higher efficiency, and second, it provides inherent high gain step-up so that low-voltage solar PV modules can be directly connected. In addition, the proposed topology has low-voltage stress, less power losses, and requires fewer independent gate drive signals compared to the other existing transformerless inverter configurations with voltage boosting capability. The design, modes of operation, analysis, and developed PWM strategy, for the proposed inverter topology, are presented in detail. Furthermore, the system performance is validated experimentally through a 400 VA laboratory prototype. The experimental investigation demonstrates that the proposed topology results in transformerless voltage boosting while achieving improved system efficiency.
KW - DC-dc converter
KW - leakage current
KW - PV system
KW - step-up transformerless inverter
KW - two-level inverter
UR - https://www.scopus.com/pages/publications/85102992609
U2 - 10.1109/TIA.2021.3066141
DO - 10.1109/TIA.2021.3066141
M3 - Article
AN - SCOPUS:85102992609
SN - 0093-9994
VL - 57
SP - 2801
EP - 2815
JO - IEEE Transactions on Industry Applications
JF - IEEE Transactions on Industry Applications
IS - 3
M1 - 9380707
ER -
