Results 1 to 10 of about 439 (164)

Topology Review of Three-Phase Two-Level Transformerless Photovoltaic Inverters for Common-Mode Voltage Reduction

Energies, 2022
In grid-connected photovoltaic (PV) systems, a transformer is needed to achieve the galvanic isolation and voltage ratio transformations. Nevertheless, these traditional configurations of transformers increase the weight, size, and cost of the inverter ...
Young-Cheol Lim, Truong-Duy Duong, Joon-Ho Choi   +2 more
exaly   +3 more sources

A new H6 neutral point clamped transformerless photo voltaic inverter [PDF]

Scientific Reports
Transformerless photovoltaic (PV) inverters are widely used in grid-connected solar energy systems due to their high efficiency and compact design. However, conventional transformerless inverters suffer from oscillating common-mode voltage (CMV), which ...
Ahmad Syed, Xiaoqiang Guo, Sudhakar Babu Thanikanti, Mohammad Khishe   +3 more
doaj   +2 more sources

Line-Interactive Transformerless Uninterruptible Power Supply (UPS) with a Fuel Cell as the Primary Source

Energies, 2018
This paper presents line-interactive transformerless Uninterruptible Power Supply (UPS) with a fuel cell as the prime energy source. The proposed UPS consists of three major parts (i.e., an output inverter, a unidirectional DC–DC converter, and a battery
Muhammad Iftikhar, Muhammad Aamir, Asad Waqar, Naila, Fahad Bin Muslim, Imtiaz Alam   +5 more
doaj   +4 more sources

A Topology Review and Comparative Analysis on Transformerless Grid-Connected Photovoltaic Inverters and Leakage Current Reduction Techniques

IET Renewable Power Generation
Photovoltaic energy source growth is significant in power generation field. Moreover, grid connected inverters strengthen this growth. Development of transformerless inverters with higher efficiency, low cost and size is competitive than the inverters ...
Hassan Haes Alhelou, Nallapaneni Manoj Kumar, Bharatiraja C   +2 more
exaly   +2 more sources

Neutral point clamped inverter for enhanced grid connected PV system performance based on hexagonal space vector modulation [PDF]

Scientific Reports
The increasing global demand for renewable energy has accelerated the adoption of grid-connected photovoltaic (PV) systems. However, conventional PV inverters often rely on transformers, which add to the system’s cost, size, and power losses ...
R. Palanisamy, K. Vijayakumar, Mohammad Imtiyaz Gulbarga, Mohammed Al Awadh, Liew Tze Hui   +4 more
doaj   +2 more sources

Design of A Single-Phase Transformerless Grid-Connected PV Inverter ‎Considering Reduced Leakage Current and LVRT Grid Codes [PDF]

Journal of Operation and Automation in Power Engineering, 2021
A new single-phase transformerless grid-connected PV inverter is presented in this paper. Investigations in transformerless grid-connected PV inverters indicate the existence of the leakage current is directly related to the variable common-mode voltage (
F. Mohammadi, J. Milimonfared, H. Rastegar, M. Farhadi-Kangarlu   +3 more
doaj   +1 more source

Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter

Energies, 2023
Utility grid-tied photovoltaic (PV) installations are becoming a typical component of the current electrical energy grid. The adoption of transformerless inverters has recently changed the topology of these systems.
Sherif A. Zaid, Abualkasim Bakeer, Hani Albalawi, Adel M. Alatwi, Hassan Abdeldaim, Bassel Manqarah   +5 more
doaj   +1 more source

Current Source Inverter (CSI) Power Converters in Photovoltaic Systems: A Comprehensive Review of Performance, Control, and Integration

Energies, 2023
Grid converters play a central role in renewable energy conversion. Among all inverter topologies, the current source inverter (CSI) provides many advantages and is, therefore, the focus of ongoing research.
Fabrizio Marignetti, Roberto Luigi Di Stefano, Guido Rubino, Roberto Giacomobono   +3 more
doaj   +1 more source

AC Fault Ride-Through Strategy of a Transformerless Soft Normally Open Point

Applied Sciences, 2022
This paper focuses on the soft normally open point (SNOP) which has no transformers and connects to the 10 kV distribution network through the arc suppression coil grounding mode.
Feng Xu, Xiaoming Huang, Yi Lu, Zheren Zhang   +3 more
doaj   +1 more source

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

Energies, 2022
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.
Belqasem Aljafari, Ashok Kumar Loganathan, Indragandhi Vairavasundaram, Selvamathi Ramachadran, Amutha Prabha Nagarajan   +4 more
doaj   +1 more source