Results 31 to 40 of about 1,044,967 (248)

Bidirectional Harmonic Current Control of Brushless Doubly Fed Motor Drive System Based on a Fractional Unidirectional Converter Under a Weak Grid

IEEE Access, 2021
The brushless doubly fed machine (BDFM) drive system based on a fractional unidirectional converter is a promising low-cost variable-speed drive system, which shows great potential in applications of driving fans and pumps.
Zhenping Li, Xuefan Wang, Ming Kong, Xi Chen   +3 more
doaj   +1 more source

Harmonic impedance estimation based on improved rank estimation

Journal of Physics: Conference Series
In response to the issue of harmonic data anomalies affecting harmonic impedance estimation, a method based on improved rank regression is proposed, building upon the foundation of rank estimation.
Dianlang Wang, Jing Chen, Qi Yin, Hanlin Ding, Qingsong Liu, Hong Miao   +5 more
semanticscholar   +1 more source

A Composite Strategy for Harmonic Compensation in Standalone Inverter Based on Linear Active Disturbance Rejection Control

Energies, 2019
This paper proposes a harmonic compensation control with disturbance rejection function for a standalone inverter. Due to the LC type three-phase three-leg inverter is connected to nonlinear loads, low-order harmonic components appears in the inverter ...
Hui Li, Yue Qu, Junwei Lu, Shuang Li
doaj   +1 more source

Wide-Band Harmonic Impedance Measurement Device for Wind Grid Based on Cascaded H-Bridge Converter

Zhongguo dianli, 2022
In wind power generation, the coupling of the wind farm power pooling system with the grid may cause high frequency resonance problems and affect the power quality of the grid.
Yongjun YU, Liguo XU, Zijie LIN, Binghan SUN, Qiujiang LIU, Zhensheng WU, Zhijie REN   +6 more
doaj   +1 more source

Current coordinated distribution and voltage optimization control for multi-VSGs system considering nonlinear and negative sequence loads

Frontiers in Energy Research
In a microgrid system where multiple virtual synchronous generators (VSGs) are interconnected through high impedance cables, the total output negative sequence and harmonic current of multiple VSGs cannot be coordinated based on the capacity of each ...
Luyao Xie, Yu Zhang, Youbing Zhang, Yi Chen, Bo Wang   +4 more
doaj   +1 more source

Assessment Method of Wind Farm Harmonic Emission Value Based on Improved Complex Linear Regression Model

MATEC Web of Conferences, 2017
Wind turbine filter and reactive power compensation devices lead to the harmonic impedance of wind farm is not much larger than that of the utility, so the influence by the wind farm harmonic impedance can not be neglected while assessing the harmonic ...
Chen Tiantian, Zhang Peng, Pan Ling, Tan Peng, Yang Honggen   +4 more
doaj   +1 more source

Multi-Harmonic Sources Harmonic Contribution Determination Based on Data Filtering and Cluster Analysis

IEEE Access, 2019
Accurately determining power consumer harmonic contribution determination is an effective method to solve power quality disputes and alleviate harmonic pollution of power grids.
Haoyuan Sha, Fei Mei, Chenyu Zhang, Yi Pan, Jianyong Zheng, Taoran Li   +5 more
doaj   +1 more source

Prevalence of 21 Physician‐Defined Severe Toxicities Following Childhood Acute Lymphoblastic Leukemia Treatment: Australian Retrospective Cohort Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Acute lymphoblastic leukemia (ALL) is the most common pediatric cancer, with an overall survival now surpassing 90% in developed countries. However, treatments are not without adverse effects. In this study, we apply the severe toxicity‐free survival (STFS) framework to determine the prevalence of 21 physician‐defined severe ...
Lane Collier, Brittany Grantham, Camilla Grud Nielsen, Louise Lundgren, Liv Andrés‐Jensen, Kjeld Schmiegelow, Chris Selman, Gareth Ball, Elyse Passmore, David A. Elliott, Rachel Conyers   +10 more
wiley   +1 more source

An Adaptive Hybrid Control of Grid Tied Inverter for the Reduction of Total Harmonic Distortion and Improvement of Robustness against Grid Impedance Variation

Energies, 2022
Background: Grid-tied inverters play an efficient role in the integration of renewable energy resources with utility grids. Motivation: However, the interconnection between power converters and the grid has been seen to be responsible for various ...
Tila Muhammad, Adnan Umar Khan, Muhammad Tajammal Chughtai, Reyyan Ahmad Khan, Yousra Abid, Muhammad Islam, Sheroz Khan   +6 more
doaj   +1 more source

Measurable Residual Disease Monitoring During Treatment for Pediatric Acute Myeloid Leukemia in First Relapse

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Survival after relapse in pediatric acute myeloid leukemia (AML) remains poor, highlighting the critical importance of identifying prognostic factors to guide optimal relapse management. Methods We investigated the prognostic impact of multiparameter flow cytometry (MFC) measurable residual disease (MRD) in 188 patients with first ...
Camilla Poulsen, Kristian Juul Sandahl, Lene Karlsson, Jonas Abrahamsson, Nira Arad‐Cohen, Daniel Cheuk, Barbara De Moerloose, Linda Fogelstrand, Jose Maria Fernandez Navarro, Bianca F. Goemans, Kirsi Jahnukainen, Gertjan Kaspers, Zhanna Kovalova, Monica Cheng Munthe‐Kaas, Ulrika Norén‐Nyström, Josefine Palle, Ramune Pasauliene, Cornelis Jan Pronk, Kadri Saks, Anne Tierens, Henrik Hasle, Kristian Løvvik Juul‐Dam   +21 more
wiley   +1 more source