Results 71 to 80 of about 2,776 (262)

A second‐order sliding mode control with active disturbance rejection for dynamic voltage restorers

IET Power Electronics
This paper proposes an extended state observer (ESO)‐based second‐order sliding mode control (SMC) for dynamic voltage restorers (DVRs). Unlike the conventional first‐order SMC and some second‐order SMC (SOSMC) methods that suffer from chattering, the ...
Farzaneh Bagheri, Samet Biricik, Hafiz Ahmed, Hasan Komurcugil   +3 more
doaj   +1 more source

Modelling and control of a back-to-back MMC–HVDC system using ADPSS

The Journal of Engineering, 2019
Back-to-back modular multilevel converter–high-voltage direct current (MMC–HVDC) can realise the asynchronous interconnection of two regional power grids. It can effectively solve the power grid stability problems caused by AC–DC power transfer and avoid
Pucheng Cai, Wang Xiang, Jinyu Wen
doaj   +1 more source

Testing to Characterize the Advanced Stirling Radioisotope Generator Engineering Unit [PDF]

, 2010
The Advanced Stirling Radioisotope Generator (ASRG), a high efficiency generator, is being considered for space missions. Lockheed Martin designed and fabricated an engineering unit (EU), the ASRG EU, under contract to the Department of Energy. This unit
Lewandowski, Edward, Schreiber, Jeffrey
core   +1 more source

A solenoidal electron spectrometer for a precision measurement of the neutron $\beta$-asymmetry with ultracold neutrons

, 2008
We describe an electron spectrometer designed for a precision measurement of the neutron $\beta$-asymmetry with spin-polarized ultracold neutrons. The spectrometer consists of a 1.0-Tesla solenoidal field with two identical multiwire proportional chamber
Abele, Abele, Abele, B. Plaster, B. Tipton, B.W. Filippone, Czarnecki, D. Harrison, Gardner, Hardy, Hardy, Ito, J. Hsiao, J. Liu, J. Yuan, J.W. Martin, Jackson, Jackson, Marciano, Martin, Martin, Morris, Nico, R. Carr, Saunders, Schumann, Severijns, T.M. Ito, Tabata, Wilkinson   +29 more
core   +1 more source

Screening for lung cancer: A systematic review of overdiagnosis and its implications

Molecular Oncology, EarlyView.
Low‐dose computed tomography (CT) screening for lung cancer may increase overdiagnosis compared to no screening, though the risk is likely low versus chest X‐ray. Our review of 8 trials (84 660 participants) shows added costs. Further research with strict adherence to modern nodule management strategies may help determine the extent to which ...
Fiorella Karina Fernández‐Sáenz, Laura de la Torre‐Perez, David R Baldwin, Carlijn van der Aalst, Mangesh Thorat, David Ritchie, Andre L Carvalho, Carolina Espina, Ivan Solà, Carlos Canelo‐Aybar, Moira Magdalena Pissinis, Pablo Alonso‐Coello, Ana Carolina Pereira Nunes Pinto   +12 more
wiley   +1 more source

Variable DC voltage based reactive power enhancement scheme for MMC‐STATCOM

IET Smart Grid
Constrained by the AC voltage amplitude modulated by a modular multilevel converter‐based static synchronous compensator (MMC‐STATCOM), its reactive power output may be subject to oscillations under grid contingencies, posing a threat to the grid stable ...
Lujie Yu, Guoyan Wang, Tong Wu, Jiebei Zhu, Campbell D. Booth   +4 more
doaj   +1 more source

VSC HVDC active damping for the Sylwin 1 offshore wind power plants

The Journal of Engineering, 2019
SylWin1 is a VSC HVDC link connecting 864 MW offshore wind power generation to Germany's high voltage network. This paper presents a harmonic performance analysis of the offshore network carried out during the design and commissioning phase with a focus ...
Alvaro Hernandez Manchola, Torsten Priebe, Torsten Priebe, Michael Hölzer, Mike Dommaschk   +4 more
doaj   +1 more source

Liquid biopsy epigenetics: establishing a molecular profile based on cell‐free DNA

Molecular Oncology, EarlyView.
Cell‐free DNA (cfDNA) fragments in plasma from cancer patients carry epigenetic signatures reflecting their cells of origin. These epigenetic features include DNA methylation, nucleosome modifications, and variations in fragmentation. This review describes the biological properties of each feature and explores optimal strategies for harnessing cfDNA ...
Christoffer Trier Maansson, Anders Lade Nielsen, Boe Sandahl Sorensen   +2 more
wiley   +1 more source

Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC

IET Renewable Power Generation
Sub‐synchronous oscillation of grid‐connected voltage source converter (VSC) dominated by phase locked loop (PLL) is an important stability issue in nowadays power systems.
Boyuan Zhao, Lei Chen, Yong Min, Yalou Li, Shiyun Xu   +4 more
doaj   +1 more source

Multi-objective optimal scheduling strategy for wind power, PV and pumped storage plant in VSC-HVDC grid

The Journal of Engineering, 2019
Zhangbei demonstration project will be the world's highest voltage level and largest capacity VSC-HVDC power grid, by which millions of kilowatts of renewable energy and pumped storage power will be supplied to Beijing.
Man Xu, Linlin Wu, Hui Liu, Xiao Wang
doaj   +1 more source