Analysis of a Photovoltaic System Based on a Highly Efficient Single-Phase Transformerless Inverter

Belqasem Aljafari, Ashok Kumar Loganathan, Indragandhi Vairavasundaram (), Selvamathi Ramachadran and Amutha Prabha Nagarajan
Additional contact information
Belqasem Aljafari: Department of Electrical Engineering, Najran University, Najran 11001, Saudi Arabia
Ashok Kumar Loganathan: Department of Electrical and Electronics Engineering, PSG College of Technology, Coimbatore 641004, India
Indragandhi Vairavasundaram: School of Electrical Engineering, Vellore Institute of Technology, Vellore 632014, India
Selvamathi Ramachadran: Department of Electrical and Electronics Engineering, AMC Engineering College, Bangalore 560083, India
Amutha Prabha Nagarajan: School of Electrical Engineering, Vellore Institute of Technology, Vellore 632014, India

Energies, 2022, vol. 15, issue 17, 1-20

Abstract: The essential requirement for a cleaner environment, along with rising consumption, puts a strain on the distribution system and power plants, reducing electricity availability, quality, and security. Grid-connected photovoltaic systems are one of the solutions for overcoming this. The examination and verification of transformerless topologies and control techniques was a significant goal of this study. The transformerless concept is advantageous for its high efficiency; the transformerless converter has added advantages of reduced price, complexity, weight, and size. This study presents a novel high-efficiency transformerless architecture that does not create common-mode currents and does not inject DC current into the grid. A single-phase transformerless inverter circuit with two step-down converters was constructed in this study. Low-frequency switches determine the polarity of the grid connection. In order to control the gate pulses of switching devices, which each regulate a half-wave of the output current, a PIC 16F877 was employed. Because there were fewer semiconductors and they were simpler to operate, it was possible to achieve a high degree of efficiency and reliability. A prototype model with input 12 V, 2 A was fabricated, test results were obtained with reduced common-mode current and DC current, and high efficiency was obtained with reduced switching losses. Further investigation for the improvement of efficiency with the elimination of ground current and leakage current has been analysed through simulation.

Keywords: transformerless inverter; photovoltaic; high-efficiency inverter; grid-connected system; single-phase inverter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/17/6145/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/17/6145/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:17:p:6145-:d:896552

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().