Results 31 to 40 of about 201,222 (195)

An adaptive reclosing scheme for flexible DC grid based on residual voltage S-transformation

Scientific Reports
When a fault occurs on a line, it is necessary to quickly isolate the fault to improve the safety and reliability of the transmission system. Due to the lack of effective ability to identify the nature of faults, the traditional automatic reclosing ...
Yue Dai, Hongchun Shu, Na An, Yutao Tang, Yiming Han   +4 more
doaj   +1 more source

Pilot protection based on the quasi-directional element of LCL-tuned half-wavelength transmission line

International Journal of Electrical Power & Energy Systems
To create HWTL characteristics, the electrical distance of AC transmission lines is compensated to half the power frequency wavelength by utilizing tuned circuits.
Yutao Tang, Hongchun Shu, Yue Dai, Yu Zhang, Yiming Han   +4 more
doaj   +1 more source

Studies of coordinated zone protection strategies for DC grid [PDF]

, 2016
DC grid technology is one of the effective methods for collecting, transmitting and accommodating large-scale renewable energy over long-distance. Voltage source converter (VSC) based DC grid technology has become a preferred technical scheme because of ...
Rahman, Md Habibur, Wu, Jing, Xu, Lie, Yao, Liangzhong   +3 more
core   +1 more source

Two‐Step Clustering‐Based Equivalent Modeling of Large‐Scale Wind Farms for Enhanced Primary Frequency Regulation

Wind Energy
The focus on wind power frequency regulation has largely been on individual wind farms, which presents challenges in meeting the coordinated operation needs of multiple stations within large‐scale installations.
Hongchun Shu, Liuqing Zhu, Botao Shi, Guangxue Wang, Shunguang Lei   +4 more
doaj   +1 more source

A Novel Sub-Module-Based Line-Commutated Converter That Is Actively Resistant to Commutation Failure

Actuators
To improve the ability of line-commutated converters (LCCs) to resist commutation failure (CF) when a fault occurs on the AC side, a novel sub-module-based LCC topology actively resistant to CF is proposed in this paper.
Hongchun Shu, Junjie Zhang, Yaoxi Jiang
doaj   +1 more source

Development and performance analysis of intelligent fault ride through control scheme in the dynamic behaviour of grid connected DFIG based wind systems

Energy Reports, 2020
As the penetration of wind power increases, the fault ride through requirements imposed by grid code is important in grid connected wind systems. The wind systems should remain connected to the grid during grid faults satisfying the grid code which ...
C.R. Raghavendran, J. Preetha Roselyn, D. Devaraj   +2 more
doaj   +1 more source

A Novel Phase locked Loop Scheme for Grid Voltage Synchronisation Using the Energy Operator [PDF]

, 2015
A well-known issue with existing power systems is rapid and accurate synchronisation to grid voltages when the system is unbalanced under grid fault conditions and corrupted with harmonics. This paper presents a novel phase locked loop technique for grid
Chong, BVP, Nwobu, CJ, Zhang, L
core   +1 more source

Fault Tolerant Control of Power Grids [PDF]

International Journal of Robust and Nonlinear Control, 2014
SUMMARYThis special issue contains article on fault detection and isolation and fault tolerant control methods applied to different aspects of modern power grids, both for detection, isolation and accommodating faults in the power grid, and for detection, isolation and accommodation of faults in power generating units. Copyright © 2014 John Wiley &
Odgaard, Peter Fogh, Aubrun, Christophe, Majanne, Yrjö   +2 more
openaire   +2 more sources

Enhanced pilot protection scheme for half-wavelength transmission line based on the conservation of traveling wave energy

International Journal of Electrical Power & Energy Systems
The half-wavelength transmission system is a viable technology for long-distance and large-capacity power transmission. It can safely and efficiently transmit a large amount of clean energy to remote load centers.
Yutao Tang, Hongchun Shu, Yue Dai, Yiming Han   +3 more
doaj   +1 more source

Dynamic modelling of wind turbine and power system for fault ride-through analysis [PDF]

, 2010
This paper presents a Simulink model of a wind power system for the holistic analysis of wind turbine and power grid during grid faults, aiming to investigate wind turbine Fault Ride-Through performance.
Anaya-Lara, Olimpo, Leithead, William, Zhang, Fan   +2 more
core