Results 31 to 40 of about 6,632,080 (294)

Frequency Dynamic Characteristic Analysis of Ultra-Low Frequency Oscillation and Multi-Machine GPSS Parameter Tuning Method [PDF]

Dianli jianshe
[Objective] The growing concern over frequency stability is attributed to the decreasing overall inertia of power systems. To improve the analysis of frequency stability and performance of modern power systems， a frequency dynamic characteristic analysis
ZENG Pijiang, XU Hao, YE Pengju, ZHENG Chao, SAI Xiangyu, CHEN Gang, ZHAO Yong, JIANG Chuyang, GAN Deqiang
doaj   +1 more source

A Comprehensive Loss Model and Comparison of AC and DC Boost Converters

Energies, 2021
DC microgrids have become a prevalent topic in research in part due to the expected superior efficiency of DC/DC converters compared to their AC/DC counterparts.
Daniel L. Gerber, Fariborz Musavi, Omkar A. Ghatpande, Stephen M. Frank, Jason Poon, Richard E. Brown, Wei Feng   +6 more
doaj   +1 more source

High power high voltage DC/DC converter for MVDC distribution applications

, 2012
Smart grids and distributed power will play a big role in the future power grid. In the future many DC grids will coexist with the traditional AC grids.
Ceballos, S., S. Ceballos, De Alegría, I. Martínez, A. Madariaga, Madariaga, A., J.L. Martin, Martín, J. L., I. Martinez de Alegria, V. Santamaria, Santamaria, V.   +9 more
core   +1 more source

An Active Power Coordination Control Strategy for AC/DC Transmission Systems to Mitigate Subsequent Commutation Failures in HVDC Systems

, 2021
Subsequent commutation failures (CFs) in HVDC systems will cause large-scale power flow transfer in AC/DC transmission systems and lead to overload risk in HVAC systems.
Jianfeng Dai, Cangbi Ding, Yang Hu, Feng Xue, Zhaowei Li, Xia Zhou, Zhaohui Qie   +6 more
core   +1 more source

A novel differential evolution algorithmic approach to transmission expansion planning [PDF]

, 2009
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Nowadays modern electric power systems consist of large-scale and highly complex interconnected transmission systems, thus transmission expansion planning ...
Sum-Im, Thanathip
core   +7 more sources

Simulation and analysis of UHV half wavelength and DC hybrid transmission system

Global Energy Interconnection, 2018
The scenarios of a half wavelength transmission line (HWTL) connected to the original DC asynchronous interconnection system are established based on the quasi-steady state model of HWTL, which include single or double loops of single channel and multi ...
Qianyu Zhao, Shouxiang Wang, Xiaohui Qin, Seyedamirabbas Mousavian, Lei Wu   +4 more
doaj   +1 more source

Stability enhancement of power system by simultaneous ac-dc power transmission

IEICE Electronics Express, 2009
Generators may supply power to infinite bus through a single circuit long ac transmission line. The system becomes unstable after the clearance of a fault if the pre fault power transfer or the fault clearance time is high. Conversion of the line for simultaneous ac-dc power flow may keep the system stable with high values of pre fault power and fault ...
Basu, K. P., H., Naeem M.
openaire   +2 more sources

Application aspects of multiterminal DC power transmission [PDF]

IEEE Transactions on Power Delivery, 1990
Four practical multiterminal DC systems are described. Two are already in commercial operation: Nelson River (double-bipole four-terminal), and Sardinia-Corsica-Italy (two-terminal monopolar tapped to become three-terminal). Two others are expansions of existing systems and are under construction: Pacific HVDC (high-voltage DC) Intertie (bipolar four ...
W.F. Long, J. Reeve, J.R. McNichol, M.S. Holland, J.P. Taisne, J. LeMay, D.J. Lorden   +6 more
openaire   +1 more source

Heterotropic regulation and negative homotropic cooperativity

FEBS Open Bio, EarlyView.
We identified a structural module common to some proteins that couple negative cooperativity with heterotropic regulation, two features that rarely coexist. These proteins are ring‐like and present an ordered asymmetry whereby noncontacting subunits are symmetric, and their tertiary structure differs from that of contacting subunits.
Veronica Morea, Francesco Angelucci, Federica Arnesano, Gianmarco Pascarella, Patrizio Di Micco, Andrea Bellelli   +5 more
wiley   +1 more source

Power Upgrading of Transmission Line by Combining AC-DC Transmission and Analysis of UPFC [PDF]

International Journal of Trend in Scientific Research and Development, 2019
The basic concept in designing of any power lines in transmission of ac dc power with power upgrading using UPFC is proposed through a single circuit ac transmission line. In this proposal certain limitation are their due to the use of ground as return path.
Sandeep Sonwane, Pratik Ghutke
openaire   +2 more sources