Results 41 to 50 of about 201,222 (195)

Power balancing and dc fault ride through in DC grids with dc hubs and wind farms [PDF]

, 2015
Acknowledgment This project was funded by European Research Council under the Ideas program in FP7; grant no 259328, 2010.Peer ...
Jovcic, Dragan, Lin, Weixing
core   +1 more source

Grid Global Behavior Prediction [PDF]

, 2011
Complexity has always been one of the most important issues in distributed computing. From the first clusters to grid and now cloud computing, dealing correctly and efficiently with system complexity is the key to taking technology a step further.
Montes, Jesús, Pérez Hernández, María de los Santos, Sánchez, Alberto   +2 more
core   +2 more sources

Backup protection method for half-wavelength transmission lines based on inverse-time characteristic

International Journal of Electrical Power & Energy Systems
The advantages of ultra-high voltage (UHV) Half-wavelength AC transmission (HWACT) technology are achieving full-line reactive power self-balancing without the need for reactive power compensation equipment along the line and avoiding the Ferranti effect.
Hongchun Shu, Lanjie Zhou, Yutao Tang, Yiming Han   +3 more
doaj   +1 more source

Adaptive reclosing scheme for flexible HVDC grid with single-pole ground fault based on residual voltage zero-crossing detection

International Journal of Electrical Power & Energy Systems
To avoid the issue of blind reclosing in conventional flexible high voltage direct current (HVDC) grid, investigating an adaptive reclosing scheme capable of identifying fault nature and duration is essential.
Yue Dai, Hongchun Shu, Yutao Tang, Feng Gong   +3 more
doaj   +1 more source

Inverse time overcurrent protection for low-frequency wind farm transmission lines based on transient current components

International Journal of Electrical Power & Energy Systems
Low-Frequency Transmission Systems (LFTS) integrate the benefits of both high-voltage alternating current (HVAC) and high-voltage direct current (HVDC) transmission technologies. This combination makes LFTS a significant innovation for transmitting large
Yue Dai, Wei Zhao, Hongchun Shu
doaj   +1 more source

Short-Circuit Analysis of DER-Based Microgrids in Connected and Islanded Modes of Operation

Energies, 2021
Since microgrids should be able to smoothly operate in two distinct modes—grid-connected and islanded, their fault currents can widely fluctuate depending on the operational mode. When the microgrid is connected to the grid, the highest fault current, by
Nikola Simic, Luka Strezoski, Boris Dumnic   +2 more
doaj   +1 more source

Sensorless control of a power converter for a cluster of small wind turbines [PDF]

, 2016
This study presents a new sensorless control for small wind turbine clusters with a single power converter with a direct torque control algorithm. The proposed system consists of a wind farm connected to a back-to-back power converter that interfaces the
Araguees Penalba, Monica, Egea Álvarez, Agustí, Gomis Bellmunt, Oriol, Rull Duran, Joan, Sudrià Andreu, Antoni   +4 more
core   +2 more sources

Service restoration strategy for active distribution networks considering source-load uncertainty

International Journal of Electrical Power & Energy Systems
Active distribution networks (ADNs) incorporate numerous distributed generations (DGs) and energy storage systems. When sudden faults occur in the system, service restoration can be enhanced through microgrid formation and network reconfiguration ...
Hongchun Shu, Hongfang Zhao, Xuezhuan Zhao   +2 more
doaj   +1 more source

A Method to Construct Early-Warning and Emergency Response System for Sulfur Hexafluoride Leakage in Substations

IEEE Access, 2020
Sulfur hexafluoride (SF6) gas leakage in populous urban areas, once occurring, can cause death from suffocation if its concentration largely exceeds 1000ppm and oxygen concentration is low than 19 vol-%.
Chunrui Liu, Wunan Gu, Lei Shi, Feng Wang   +3 more
doaj   +1 more source

Flexiable Fault Ride Through Capability Improvement of Semi-Direct Drive Wind Power System Based on Improved Grid-Side Control Strategy

南方能源建设, 2023
[Introduction] In order to improve the flexible fault ride through (FFRT) capability of semi-direct drive wind power system, this paper proposes an improved grid-side control strategy with reactive power priority.
Jiangtao GUO, Shuo CHEN, Liling HUANG
doaj   +1 more source