Results 71 to 80 of about 4,536,491 (200)

Pilot protection scheme for transmission line of a hybrid HVDC system based on polarity characteristics of current and voltage fault components

The Journal of Engineering, 2019
A hybrid high-voltage direct current (HVDC) system comprises a line commutated converter (LCC) at the rectifier side and a voltage source converter (VSC) at the inverter side, combining advantages of both LCC and VSC systems.
Yanting Wang, Baohui Zhang, Baohui Zhang, Shaojie Cheng   +3 more
doaj   +1 more source

Comparative Evaluation of Ethanolic Extracts Obtained From the Seeds of White and Black Açai Exhibit Antioxidant and Cytoprotective Activity In Vitro

Chemistry &Biodiversity, Volume 23, Issue 10, October 2026.
Açai seed extracts (black/white) showed antioxidant activity (black ∼30% stronger), no cytotoxicity or genotoxicity, and transient cytoprotection in normal and cancer cell lines. Black extract (200 µg/mL) inhibited colony formation without reducing cisplatin efficacy. Phenolic‐rich seed waste warrants further therapeutic study. ABSTRACT The açai fruit (
Luana França Calandrini de Azevedo, Estanislaw Tairowite Prestes Correa, Hemilly Casanova Gonçalves Soeiro, Oscar Vinícius Moraes dos Santos, Gustavo Henrique da Silva Lopes, Karina Motta Melo, Vinicius Silva de Carvalho, Andryo Orfi de Almada Vilhena, Jorge das Dores Rissino, Karen Albuquerque Dias da Costa, Alberdan da Silva Santos, Cleusa Yoshiko Nagamachi, Julio Cesar Pieczarka   +12 more
wiley   +1 more source

A Hybrid VSC-HVDC System based on Modular Multilevel Converter and Alternate Arm Converter [PDF]

, 2020
The interoperability challenges of emerging modular voltage source converter (VSC) topologies HVDC systems should be addressed along with rapid transformation of power systems driven by the need for more interconnected networks.
Wickramasinghe, HR, Konstantinou, G ; https://orcid.org/, Harith R. Wickramasinghe, Wickramasinghe, Harith ; https://orcid.org/, Sun, P ; https://orcid.org/, Pingyang Sun, Georgios Konstantinou   +6 more
core   +1 more source

Hindered Dynamic Diversity: Nuclear Magnetic Resonance Investigation of Cation Species in Zeolite Growth Systems

ChemistryEurope, Volume 4, Issue 10, October 2026.
Combined experimental and computational NMR approaches reveal how increasing cation concentration reshapes local Na and Cs environments in hydrated silicate ionic liquids. Greater speciation diversity, longer‐lived cation surroundings, and reduced mobility produce characteristic spectroscopic signatures, providing a molecular‐level understanding of the
Siebe Vanlommel, C. Vinod Chandran, Wim Temmerman, Dries Vandenabeele, Christine Kirschhock, Eric Breynaert, Toon Verstraelen, Veronique Van Speybroeck, Jelle Vekeman   +8 more
wiley   +1 more source

Variance‐Empirical Mode Decomposition Method for Fault Detection in MMC‐HVDC Transmission Lines

Energy Science &Engineering, Volume 14, Issue 10, Page 4626-4640, October 2026.
A variance‐embedded empirical mode decomposition (VEMD) method is proposed for fast and accurate fault detection in MMC‐HVDC transmission lines. By combining variance analysis with EMD, the method reliably detects various faults without communication links and remains robust to noise and non‐fault transients.
Seyed Amir Hosseini, Behrooz Taheri
wiley   +1 more source

Control and modulation methods of voltage source converter

, 2009
Control and modulation methods of voltage source converterControl and modulation methods of Voltage Source Converter (VSC) have been presented in the paper.
G. Radomski
core   +1 more source

Tuning harmonic absorption of voltage source converters

, 2010
This paper develops a tool for controlling the harmonic absorption of hysteretic controlled voltage source converters that are connected to a power system. Each VSC is controlled by a state feedback control input to a hysteretic comparator.
Zare, F, Ghosh, Arindam, Firuz Zare, Gerard Ledwich, Arindam Ghosh, Ledwich, Gerard, zare, F., Ledwich, G.   +7 more
core   +1 more source

Comprehensive comparison of a current-source and a voltage-source converter for three-phase EV fast battery chargers [PDF]

, 2015
This paper presents a comprehensive comparison of a current-source converter and a voltage-source converter for three-phase electric vehicle (EV) fast battery chargers.
Afonso, João L., J. G. Pinto, Pinto, J. G., Monteiro, Vítor Duarte Fernandes, Bruno Exposto, Vitor Monteiro, Exposto, Bruno Fernandes, Joao L. Afonso   +7 more
core   +1 more source

Fault-tolerant control for a modular generator and converter scheme for direct-drive wind turbines : Industrial Electronics, IEEE Transactions on [PDF]

, 2011
A modular power electronic converter, with a cascaded H-bridge multilevel inverter, has been proposed as the grid interface for a large direct drive wind turbine generator.
Parker, Max, Ng, Chong, Ran, Li, Parker, M.A., Max A. Parker, Chong Ng, Li Ran   +6 more
core   +1 more source

PHOTOVOLTAIC SYSTEM INTERFACE WITH A DC-DC BOOST CONVERTER IN D-STATCOM FOR POWER QUALITY IMPROVEMENT

Electrica, 2019
In this paper, a three-phase three-wire Distribution STATic COMpensator (DSTATCOM) which is fed by Photovoltaic (PV) array or battery operated DC-DC boost converter is proposed for power quality improvement in the distribution system.
V. Kamatchi Kannan, N. Rengarajan
doaj   +2 more sources