Results 21 to 30 of about 275 (163)

Fault Ride-Through Control Strategy for Variable Speed Pumped Storage Unit with Full-Size Converter

Applied Sciences
Fault ride-through is a prerequisite for ensuring continuous operation of a variable-speed pumped storage unit with a full-size converter (FSC-VSPU) and providing support for the renewable energy and power grid.
Huabo Shi, Lijie Ding, Xueyang Zeng, Yuhong Wang, Pengyu Pan, Gang Chen, Yangtao Liu, Jianquan Liao   +7 more
doaj   +2 more sources

A novel FRT strategy for transformerless MMC to improve current differential protection performance under single-phase grounding faults

International Journal of Electrical Power & Energy Systems
AC/DC distribution networks are interconnected by converters such as modular multilevel converters (MMCs). In AC/DC distribution networks, single-phase grounding (SPG) faults can cause enormous challenges in relay protection.
Yuze Li, Peng Guo, Qianming Xu, Josep M. Guerrero   +3 more
doaj   +2 more sources

Enhancing HVRT capability of DFIG-based wind farms using cooperative rotor-side SMES considering the blocking fault of LCC-HVDC system

CSEE Journal of Power and Energy Systems, 2021
Line-commutated converter based high voltage direct current (LCC-HVDC) has been applied for transferring bulk power from wind farms to load center through long distance in many countries.
Qi Xie, Zixuan Zheng, Xianyong Xiao, Chunjun Huang, Jiaqu Zheng, Jie Ren   +5 more
doaj   +2 more sources

Enhanced LVRT and HVRT Capability of Grid Tied PMSG Based Wind Energy System Using Active Disturbance Rejection Controller [PDF]

Journal of Renewable Energy and Environment
The widespread integration of wind energy poses numerous challenges, including ride-through capability issues, stability concerns, and power quality issues within the utility grid.
Sagiraju Dileep Varma, Sarathbabu Duvvuri, Omkar Koduri, Srikanth Malladi   +3 more
doaj   +2 more sources

Discrimination between hypervirulent and non-hypervirulent ribotypes of Clostridioides difficile by MALDI-TOF mass spectrometry and machine learning. [PDF]

Eur J Clin Microbiol Infect Dis, 2023
Hypervirulent ribotypes (HVRTs) of Clostridioides difcile such as ribotype (RT) 027 are epidemiologically important. This study evaluated whether MALDI-TOF can distinguish between strains of HVRTs and non-HVRTs commonly found in Europe.
Abdrabou AMM, Sy I, Bischoff M, Arroyo MJ, Becker SL, Mellmann A, von Müller L, Gärtner B, Berger FK.   +8 more
europepmc   +2 more sources

Richter Transformation in Chronic Lymphocytic Leukemia: Update in the Era of Novel Agents. [PDF]

Cancers (Basel), 2021
Richter transformation (RT) is a poorly understood complication of chronic lymphocytic leukemia (CLL) with a dismal prognosis. It is associated with a switch in histopathology and biology, generally with a transformation of the original CLL clone to ...
Tadmor T, Levy I.
europepmc   +2 more sources

High-Velocity, Accentuated Eccentric, or Maximal Elastic Band Resistance Training? Effects of Resistance Training Modalities on Bone Health, Isokinetic Strength, and Systemic Biomarkers in Sedentary Older Adults: A Comparative Study. [PDF]

Healthcare (Basel)
Objectives: To examine three elastic band resistance training (EB-RT) modalities—high-velocity (HVRT), accentuated eccentric (Aecc), and maximal strength (Max)—on bone health, strength, redox-inflammatory profile, and neuroplasticity in ...
Saez-Berlanga A, Gene-Morales J, Teixeira AM, Jiménez-Castuera R, Gené-Sampedro A, Juesas A, Gargallo P, Caballero O, Fernandez-Garrido J, Alix-Fages C, Jiménez-Martínez P, Colado JC.   +11 more
europepmc   +2 more sources

Effect of two different volumes of resistance training on serum level of fibroblast growth factor-21, body fat percentage and mobility in obese elderly women [PDF]

Majallah-i Zanān, Māmā̓ī va Nāzā̓ī-i Īrān, 2020
Introduction: Fibroblast growth factor 21 (FGF21) increases lipolysis and fatty acid oxidation. The effect of different volumes of resistance training on FGF21 is not well defined.
Zeinab Fattahi, Hossein TaheriChadorneshin, Esmat Rashidi, Seyed-Hosein Abtahi-Eivary   +3 more
doaj   +1 more source

Mitigation of harmonics and inter-harmonics with LVRT and HVRT enhancement in grid-connected wind energy systems using genetic algorithm- optimized PWM and fuzzy adaptive PID control [PDF]

, 2021
The growing installed wind capacity over the last decade has led many energy regulators to define specific grid codes for wind energy generation systems connecting to the electricity grid.
Denai, Mouloud, Mouloud Denai, Allali, Ahmed, Houari Merabet Boulouiha, Mostefa, Abdelkader, Abdelkader Mostefa, Ahmed Allali, Merabet Boulouiha, Houari   +7 more
core   +1 more source

Overview of frequency control techniques in power systems with high inverter‐based resources: Challenges and mitigation measures

IET Smart Grid, Volume 6, Issue 5, Page 447-469, October 2023., 2023
Power systems are transitioning towards a higher proportion of inverter‐based resources. This leads to the loss of synchronous generators and their associated control mechanisms. To address low inertia challenges, new international fast frequency response services are established, and renewable enabling technologies and sources are investigated to ...
Dlzar Al Kez, Aoife M. Foley, Faraedoon Ahmed, D. John Morrow   +3 more
wiley   +1 more source