Results 91 to 100 of about 733,401 (250)

A Grid Connected Photovoltaic Generation System With Compensation Of Current Harmonics And Voltage Sags

Eletrônica de Potência, 2006
This paper presents a system that provides photovoltaic generation as well as the ability to compensate current harmonics and voltage sags. The system can be controlled for current harmonics and reactive power compensation simultaneously by using a ...
Marcelo Cabral Cavalcanti, Gustavo Medeiros de Souza Azevedo, Bruno de Aguiar Amaral, Francisco de Assis dos Santos Neves, Davi Carvalho Moreira, Kleber Carneiro de Oliveira   +5 more
doaj   +1 more source

Dynamic Voltage Restorer Against Balanced and Unbalanced Voltage Sags: Modelling and Simulation

, 2004
This paper presents modelling aspects of several types of Dynamic Voltage Restorer (DVR) working against various voltage sags by simulation in PSCAD/EMTDC.
Saha, Tapan K., Nguyen, P. T.
core  

Major engineering breakthrough of Well XA‐1, the deepest ten‐thousand‐meter well in a global sedimentary basin

Deep Underground Science and Engineering, EarlyView.
Well XA‐1, completed at a true vertical depth of 11 156 m in the Shawan Sag of the Junggar Basin, is the deepest predominantly near‐vertical well drilled in a sedimentary basin. The figure shows the basin's tectonic framework and well location (a), a structural cross‐section spanning the Shawan Sag and adjacent uplifts (b), and the stratigraphic column
Fangkai Liu, Qingwen Tan, Sen Zhu, Guangyou Zhu   +3 more
wiley   +1 more source

Research on the Impacts of Voltage Sag to Lighting Fixture

Kongzhi Yu Xinxi Jishu, 2011
Based on ms level voltage sag generator, the performances on voltage sags of lamps occurred in different amplitudes, phase angles, durations are researched.
于希娟, 李洪涛, 赵贺
doaj  

Proposal of voltage transient sag compensator with controlled gradational voltage

Electrical Engineering in Japan, 2005
This paper presents a new concept for a voltage transient sag compensator and the experimental result of its 400-V-class compensator. This compensator is composed of the series connection of some inverter units with gradational output voltages. Because each output voltage is different by 2n times, an approximate sinusoidal voltage is generated by ...
Masaki Yamada, Akihiro Suzuki, Akihiko Iwata, Toshiyuki Kikunaga, Hajimu Yoshiyasu, Kazuo Yamamoto, Nobuhiko Hatano   +6 more
openaire   +2 more sources

World's fastest 10 000‐m breakthrough: The XY‐22 well redefines deep‐earth access in the Tarim Basin

Deep Underground Science and Engineering, EarlyView.
The Tarim Basin in northwestern China hosts one of the world's deepest petroleum systems, exemplified by the XY‐22 ultra‐deep well (bottom depth: 11 116 m; ~220°C, ~145 MPa). This study integrates tectonic mapping, geological cross‐sections, ultraviolet fluorescence microscopy, and optical photothermal infrared (OPTIR) spectroscopy to characterize ...
Qingwen Tan, Fangkai Liu, Sen Zhu, Guangyou Zhu, Haiping Huang   +4 more
wiley   +1 more source

A New Algorithm for Relative Location of Voltage Sags Based on Voltage Measurements Only

, 2013
This paper presents a tool easily implemented for relative location of voltage sags based on voltage measurements only. Voltage sags are considered from network faults in distribution systems only.
Blanco Solano, JAIRO Jairo
core   +1 more source

Voltage Compensation-Type Current Limiter Based on Hybrid Distribution Transformer for Power Quality Enhancement

EAI Endorsed Transactions on Energy Web
This paper presents a voltage compensation-type current limiter based on a hybrid distribution transformer (HDT) structure, which integrates a three-winding transformer, AC/DC converter, DC/AC converter, current-limiting unit, bypass switches, and a ...
Ruiayo Wang, Jianhua Wang, Han Yan, Weiming Chen, Yuanliang Fan   +4 more
doaj   +1 more source

Time-Domain Voltage Sag State Estimation Based on the Unscented Kalman Filter for Power Systems with Nonlinear Components

Energies, 2018
This paper proposes a time-domain methodology based on the unscented Kalman filter to estimate voltage sags and their characteristics, such as magnitude and duration in power systems represented by nonlinear models.
Rafael Cisneros-Magaña, Aurelio Medina, Olimpo Anaya-Lara   +2 more
doaj   +1 more source

Carbon‐Negative Upcycling of Sewage Sludge into Superiorly Stable Gel Via Liquid‐Phase Utilization Strategy for Water‐Remediation

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work developed a low‐temperature sludge hydrothermal coupled with gel crosslinking strategy which could upgrade the waste liquid generated from sewage sludge hydrothermal treatment into the hydrothermal‐liquid‐gel. The inventive hydrothermal‐liquid‐gel exhibited the enhanced pollutant removal capability, high synthetic stability, and superior ...
Zifan Liu, Sunxinyi Wang, Lingxiao Lu, Weiguo Zhang, Qiang Zheng, Cailiang Yue, Huimin Chang, Xiaohui Lu, Ming Xu, Zhi Qian, Qing Zhou, Fuqiang Liu, Baoshan Xing   +12 more
wiley   +1 more source