Results 21 to 30 of about 265,688 (306)

Analysis of two-phase operation characteristics of a flexible low-frequency transmission system

open access: yesZhejiang dianli, 2022
The two-phase operation mode of a flexible low-frequency transmission system is based on the M3C (modular multilevel matrix converter). This paper establishes a complex sequence network for the low-frequency system to analyze the steady-state operation ...
LU Yi   +6 more
doaj   +1 more source

Smart Power Grid Synchronization With Fault Tolerant Nonlinear Estimation [PDF]

open access: yes, 2016
Effective real-time state estimation is essential for smart grid synchronization, as electricity demand continues to grow, and renewable energy resources increase their penetration into the grid.
Wang, Xin, Yaz, Edwin E
core   +2 more sources

IGBT-SiC dual fed open end winding PMSM drive [PDF]

open access: yes, 2017
This paper proposes a dual fed common dc link inverter Open End Winding-Permanent Magnet Synchronous Motor (OEW-PMSM) Drive. In order to increase the system efficiency a dual technology converter is used, with one inverter composed of standard IGBT ...
Cox, Tom   +4 more
core   +1 more source

Length-independent DNA packing into nanopore zero-mode waveguides for low-input DNA sequencing [PDF]

open access: yes, 2017
Compared with conventional methods, single-molecule real-time (SMRT) DNA sequencing exhibits longer read lengths than conventional methods, less GC bias, and the ability to read DNA base modifications.
Henley, Robert Y.   +4 more
core   +1 more source

Investigation of negative sequence injection capability in H-bridge multilevel STATCOM [PDF]

open access: yes, 2014
The aim of this paper is to investigate the ability of star- and delta-connected H-bridge multilevel STATCOMs to exchange negative-sequence current with the grid. Zero-sequence injection is utilized for capacitor voltage balancing.
Behrouzian, Ehsan   +2 more
core   +1 more source

Power Control and Fault Ride-Through Capability Analysis of Cascaded Star-Connected SVG under Asymmetrical Voltage Conditions

open access: yesEnergies, 2019
The cascaded H-bridge static var generator (SVG) has been employed to provide reactive power and regulate grid voltages for many years because of its good modularity, easy scalability, and improved harmonic performance.
Muxuan Xiao   +5 more
doaj   +1 more source

Control of a Modular Multi-level Converter STATCOM for Low Voltage Ride-Through Condition [PDF]

open access: yes, 2016
This paper presents a simulation study on the implementation of the Single Star Flying Capacitor Converter Modular Multi-level Cascaded Converter (MMCC-SSFCC) as a STATCOM operating under voltage sag condition.
Oghorada, OJK, Zhang, L
core   +2 more sources

New Modulation Technique to Mitigate Common Mode Voltage Effects in Star-Connected Five-Phase AC Drives [PDF]

open access: yes, 2020
Star-connected multiphase AC drives are being considered for electromovility applications such as electromechanical actuators (EMA), where high power density and fault tolerance is demanded.
Fernandez, Markel   +5 more
core   +2 more sources

Sequence-current control strategies for transformerless voltage-source converters in islanded grids of AC/DC distribution system under asymmetrical ground faults

open access: yesInternational Journal of Electrical Power & Energy Systems
Islanded grids play a crucial role in AC/DC distribution systems. The adoption of transformerless voltage-source converters as the primary power source is an important development direction for AC/DC distribution systems.
Yuze Li   +4 more
doaj   +1 more source

A Single-Phase-to-Ground Fault Detection Method Based on the Ratio Fluctuation Coefficient of the Zero-Sequence Current and Voltage Differential in a Distribution Network

open access: yesIEEE Access, 2023
Because the traditional zero-sequence overcurrent protection method is not effective in detecting single-phase-to-ground faults (SPGF) in a low-resistance grounded system (LRGS), this paper analyzes the fault characteristics of a 10-kV LRGS in detail ...
Huamin Liang, Haifeng Li, Gang Wang
doaj   +1 more source

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