Results 21 to 30 of about 5,878 (185)

Transient Instability Mechanism and Control Method of PLL-Based Grid-Connected VSC

Zhongguo dianli, 2022
The transient instability mechanism and control method of grid-following control voltage source converter (VSC) are comprehensively studied to solve the transient instability of PLL (phase locked loop)-based VSC with consideration of the influence of ...
Zheng CHEN, Pengfei HU, Liyu DAI, Chaohui ZHOU, Yanxue YU, Xiaoqing XIU   +5 more
doaj   +1 more source

Features Transmission Ethnocultural Specificity of the Folklore Text (on the Basis of Funds Fabulous Prose Ossetians)

Oriental Studies, 2018
With evidence from Ossetian fairy tale prose (magic fairy tales), the present work is the first attempt to consider expression of distinctive national components and features in translated texts. In addition to proverbs, sayings, phraseological units and
E. B. Dzaparova, D. V. Sokaeva
doaj   +1 more source

New design of variable structure control based on lightning search algorithm for nuclear reactor power system considering load-following operation

Nuclear Engineering and Technology, 2020
Reactor control is a standout amongst the most vital issues in the nuclear power plant. In this paper, the optimal design of variable structure controller (VSC) based on the lightning search algorithm (LSA) is proposed for a nuclear reactor power system.
M. Elsisi, H. Abdelfattah
doaj   +1 more source

Available and novel plant-based carbon dots derived from Vaccaria Semen carbonisata alleviates liver fibrosis

Frontiers in Molecular Biosciences, 2023
Background: Liver fibrosis represents an intermediate stage in the progression of liver disease, and as of now, there exists no established clinical therapy for effective antifibrotic treatment.Purpose: Our aim is to explore the impact of Carbon dots ...
Yafang Zhao, Ertong Dai, Liyang Dong, Jinye Yuan, Yusheng Zhao, Tong Wu, Ruolan Kong, Menghan Li, Shuxian Wang, Long Zhou, Yingxin Yang, Hui Kong, Yan Zhao, Huihua Qu   +13 more
doaj   +1 more source

A VSC-based Model for Power Flow Assessment of Multi-terminal VSC-HVDC Transmission Systems [PDF]

Journal of Modern Power Systems and Clean Energy, 2021
This paper puts forward a new practical voltage source converter (VSC) based AC-DC converter model suitable for conducting power flow assessment of multi-terminal VSC-based high-voltage direct current (VSC-MTDC) systems. The model uses an advanced method to handle the operational limits and control modes of VSCs into the power flow formulation. The new
Martinez-Parrales, Ricardo, Fuerte-Esquivel, Claudio R., Alcaide-Moreno, Boris A., Acha, Enrique   +3 more
openaire   +4 more sources

Removing an Embolized Peripheral Intravenous Catheter from the Left Caudal Lung Lobe of a Dog via Intercostal Thoracotomy

Veterinary Sciences
An 8-month-old Standard Poodle was referred to a surgical specialist for suspected peripheral intravenous catheter (PIVC) embolism originating from the right cephalic vein. Upon removing the 20-gauge PIVC, the tip appeared to be 2 cm shorter. Radiographs
Samantha Masca, Margaret Goodale, Anke Langenbach   +2 more
doaj   +1 more source

The Effects of Fire Severity on Vegetation Structural Complexity Assessed Using SAR Data Are Modulated by Plant Community Types in Mediterranean Fire-Prone Ecosystems

Fire, 2023
Vegetation structural complexity (VSC) plays an essential role in the functioning and the stability of fire-prone Mediterranean ecosystems. However, we currently lack knowledge about the effects of increasing fire severity on the VSC spatial variability,
Laura Jimeno-Llorente, Elena Marcos, José Manuel Fernández-Guisuraga   +2 more
doaj   +1 more source

Synthesis, Structure, and Reactivity of a Magnesium(0) Complex with a Polarized Mgδ−─Caδ+ Bond

Angewandte Chemie, EarlyView.
Mixing metals: The elusive unsupported two‐center‐two‐electron Mg─Ca bond has been realized by using a combination of β‐diketiminate and amidinate ligands. Due to electronegativity differences (Mg: 1.31, Ca: 1.00) the formal oxidation states are Mg0─CaII.
Sandeep Kumar Thakur, Jens Langer, Nil Roig, A. Ganesh Patro, Marcel A. Schmidt, Mercedes Alonso, Sjoerd Harder   +6 more
wiley   +2 more sources

Robust control strategy of VSC-HVDC systems based on feedback linearization and disturbance compensation method

Energy Reports, 2023
The Voltage Source Converter based High Voltage Direct Current (VSC-HVDC) technology has become the development direction of new energy grid-connected, DC power transmission and island power supply technology in the future due to its superior ...
Ping Yang, Yinguo Yang, Ziwen Liu, Yi Yang, Yinjie Qin   +4 more
doaj   +1 more source

The transient instability mechanism and stability‐enhanced LVRT control for VSC riding‐through severe grid voltage sag

IET Renewable Power Generation, 2023
As the grid‐connected interface device of wind and photovoltaic power generation, the voltage source converter (VSC) must pass the low voltage ride‐through (LVRT) test. However, existing literature demonstrates that under weak grid conditions, there is a
Huiqiang Sun, Xinchun Lin, Guangzhou Huang, Jiayan Zhang, Dan Liu, Kezheng Jiang, Yong Kang   +6 more
doaj   +1 more source