Results 21 to 30 of about 206 (201)

Sliding mode control of four‐leg inverters in a stand‐alone microgrid for unbalance, neutral to ground voltage, and harmonics compensation

IET Renewable Power Generation, 2023
In a stand‐alone microgrid, voltage control is an important issue to keep the grid balanced under unbalanced load conditions. The other important challenges in microgrids include handling the neutral to the ground voltage (NGV) as well as total harmonic ...
Effat Ayoubi, Mohammad Reza Miveh, Ali Asghar Ghadimi, Sajad Bagheri, Masoud Mehrabi Koushki   +4 more
doaj   +1 more source

A Comprehensive AC Current Ripple Analysis and Performance Enhancement via Discontinuous PWM in Three-Phase Four-Leg Grid-Connected Inverters

Energies, 2020
A complete analysis of the ac output current ripple in four-leg voltage source inverters considering multiple modulation schemes is provided. In detail, current ripple envelopes and peak-to-peak profiles have been determined in the whole fundamental ...
Riccardo Mandrioli, Aleksandr Viatkin, Manel Hammami, Mattia Ricco, Gabriele Grandi   +4 more
doaj   +1 more source

Finite-time composite control scheme for three-phase four-leg inverter under variable operating conditions

The Journal of Engineering, 2019
Three-phase four-leg inverters widely used in microgrid can effectively provide the power for the non-linear/unbalanced loads. Here, the non-linear composite controller is proposed for three-phase four-leg inverter system under [inline-formula] reference
Yuge Sun, Xitong Niu, Chuanlin Zhang, Nannan Jiang   +3 more
doaj   +1 more source

Artificial neural networks controllers for three-phase neutral point clamped inverters

Engineering Science and Technology, an International Journal, 2023
In this study, a new current control method consisting of proportional-resonant (PR) based artificial neural networks (ANN) has been developed for a neutral point clamped (NPC) inverter.
Yunus Emre Yağan, Kadir Vardar
doaj   +1 more source

Advance Technology in Application of Four Leg Inverters to UPQC

International Journal of Power Electronics and Drive Systems (IJPEDS), 2016
This article presents a novel application of four leg inverter with conventional Sinusoidal Pulse Width Modulation (SPWM) Scheme to Unified Power Quality Conditioner (UPQC). The Power Quality problem became burning issues since the starting of high voltage AC transmission system. Hence, in this article it has been discussed to mitigate the PQ issues in
K. Venkata Rami Reddy, T. Gowri Manohar, B. Chandra Sekhar   +2 more
openaire   +1 more source

Hierarchical switch fault diagnosis based on transformer algorithm in four-leg inverters of stand-alone wind energy conversion systems

International Journal of Electrical Power & Energy Systems
With the increasing development of renewable energy resources, stand-alone structures are gaining more attention. Among these, wind energy systems are particularly notable because of their advantages, including sustainability, low operational expenses ...
Jalal Heidari, Rasool Peykarporsan, Soroush Oshnoei, Tek Tjing Lie, Lieven Vandevelde, Guillaume Crevecoeur   +5 more
doaj   +1 more source

Design and Implementation of Novel Multi-Converter-Based Unified Power Quality Conditioner for Low-Voltage High-Current Distribution System

Energies, 2018
This paper introduces a novel multi-converter-based unified power quality conditioner (MCB-UPQC). Three optimization methods are proposed based on the traditional UPQC: (1) The shunt converter is substituted with multi-modular parallel converters. Hence,
Bin Yang, Kangli Liu, Sen Zhang, Jianfeng Zhao   +3 more
doaj   +1 more source

Digital Predictive Current Control of a Three-Phase Four-Leg Inverter

IEEE Transactions on Industrial Electronics, 2013
While the classical control techniques for threephase two-level four-leg inverters are based on pulse width modulation or three-dimensional space vector modulation, this paper presents a simple digital current control strategy without the modulation stage.
Marco Rivera, Venkata Yaramasu, Ana-Maria Llor, José R. Rodríguez, Bin Wu 0007, Maurice Fadel   +5 more
openaire   +1 more source

A Four-Level T-Type Neutral Point Piloted Inverter for Solar Energy Applications

Energies, 2018
Multilevel inverters provide an output signal with low harmonic distortion and superior output voltages. This work proposes a new four-level T-type neutral point piloted (T-NPP) topology with higher efficiency and low total harmonic distortion (THD) and ...
Saddam Shueai Alnamer, Saad Mekhilef, Hazlie Bin Mokhlis   +2 more
doaj   +1 more source

Long‐Term Neurologic Exam Findings in People Diagnosed and Treated During Acute HIV Infection

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Evaluate clinical and laboratory correlates of abnormal neurologic exam findings after acute HIV infection (AHI). Methods Participants from the RV254/SEARCH 010 cohort in Bangkok underwent standardized neurologic examinations at Weeks 0 (AHI), 12, 96, and 288 following antiretroviral therapy (ART).
Kathryn B. Holroyd, Tyler Hamby, Carlo Sacdalan, Somchai Sriplienchan, Pathariya Promensa, Luxenaree Poonpitak, Netsiri Dumrongpisutikul, Eugène Kroon, Sandhya Vasan, Robert Paul, Ferron O'Campo, Lydie Trautmann, Phillip Chan, Serena Spudich, on behalf of the RV254/SEARCH 010 Study Team, Julie Ake, Sandhya Vasan, Lydie Trautmann, Merlin Robb, Trevor Crowell, Donn Colby, Diane Bolton, Shelly Krebs, Leigh Ann Eller, Morgane Rolland, Rasmi Thomas, Dominic Paquin Proulx, Suteeraporn Pinyakorn, Tyler Hamby, Mark de Souza, Ellen Turk, Amber Moodley, Gerald Quarles, Jintanat Ananworanich, Denise Hsu, Victoria Polonis, Nelson Michael, Sheila Peel, COL Eric Garges, Alexandra Schuetz, Siriwat Akapirat, Bessara Nantapinit, Pornsuk Visudhiphan, Saowanit Getchalarat, Nampueng Churikanont, Sangsulee Thamakaison, Somchai Sriplienchan, Carlo Sacdalan, Pathariya Promsena, Luxe‐naree Poonpitak, Eugene Kroon, Nitiya Chomchey, Jintana Intasan, Varaporn Pothipala, Ferron Ocampo, Nittaya Phanuphak, Nipat Teeratakulpisan, Yuwaree Pichitchok, Anchalee Avihingsanon, Opass Putcharoen, Kiat Ruxrungtham, Thanyawee Puthanakit, Sopark Manasnayakorn, Phandee Watanaboonyongcharoen, Rungsun Rerknimitr, Irini Sereti, Daniel Douek, Eli Bortiz, Frank Maldarelli, Mary Kearney, Serena Spudich, Phillip Chan, Lishomwa Ndhlovu, Guinevere Li, Michael Corley, Victor Valcour, Peter Hunt, Jacob Estes, Afam Okoye, Jeff Lifson, Claire Deleage, Nicolas Chomont, Andres Finzi, Lyle McKinnon, Henrik Zetterberg, Robert Siliciano, Robert Paul, Julie Mannarino, Jonathan Li, John Mellors, Josh Cytkor, Dan Barouch, Michael Seaman, Boris Juelg, Alex Shalek, Timothy Schacker, Ashley Haase, Mario Stevenson, Wenjun Li, Arthur Kim, Sharon Lewin, Adam Carrico, Susana Valente, Fred Hutchinson, Josh Schiffer, Guido Ferrari, Beau Ances, Alberto Bosque, Katharine Bar, Killian Pohl, David Ho, Yaoxing Huang, Michael Busch, Mohamed Abdel‐Mohsen, Johanna Gostner, Brian Agan, Fatah Kashanchi, Greg Laird, Kathryn Holroyd   +118 more
wiley   +1 more source