Results 21 to 30 of about 1,650,409 (264)

Fault characteristic analysis of photovoltaic inverter considering negative sequence control strategy

open access: yesZhejiang dianli, 2023
In case of an asymmetrical fault in PV accessed system, the inverter will simultaneously control the outputs of positive and negative sequence currents.
XU Xiaochun   +3 more
doaj   +1 more source

Single Phasing Effects on the Behavior of Three-Phase Induction Motor

open access: yesTikrit Journal of Engineering Sciences, 2023
The output of three-phase induction motors (3IM) is adversely affected by voltage imbalance. This work analyzes and estimates the output of a 3PIM operating on a balanced supply while contrasting it with a "single phasing" case.
Layth Fadhil Abbas   +4 more
doaj   +1 more source

Improved Model of Thermal Rotor Protection Including Negative Sequence Protection

open access: yesEnergies, 2022
The paper presents a new model of the thermal rotor protection 49R on synchronous generators with self-excitation with the influence of generator negative sequence protection 46I2.
Davorin Burgund, Srete Nikolovski
doaj   +1 more source

A Comprehensive VSM Control Strategy Designed for Unbalanced Grids

open access: yesEnergies, 2019
A virtual synchronous machine (VSM) is a converter which, compared to other types of converters, has more friendly interactions with the power grid because it is able to simulate the external characteristics of a synchronous machine, which can provide ...
Huiyu Miao   +4 more
doaj   +1 more source

Effects of Negative Sequence Voltage Subharmonics on Cage Induction Motors

open access: yesEnergies, 2022
In some power systems, voltage waveforms contain, apart from harmonics, interharmonics and subharmonics that are components of frequency less than or not an integer multiple of the fundamental frequency.
Piotr Gnaciński   +4 more
doaj   +1 more source

The nuanced negative: Meanings of a negative diagnostic result in clinical exome sequencing [PDF]

open access: yesSociology of Health & Illness, 2016
AbstractGenomic sequencing technology is moving rapidly from the research setting into clinical medicine but significant technological and interpretive challenges remain. Exome sequencing (ES) in its recent clinical application provides a genetic diagnosis in about 25 per cent of cases (Berg 2014).
Debra, Skinner   +2 more
openaire   +2 more sources

Current decoupling control strategy for unbalanced input 3-1 matrix converter

open access: yes工程科学学报, 2017
The reasons for low-order harmonics in the input current of a 3-1 matrix converter (3-1MC) were analyzed, and the relationship of modulation function between the output side and power compensation side was derived.
XU Yu-xiang   +3 more
doaj   +1 more source

ASSESSMENT OF THE PROPORTIONAL CONTRIBUTION OF THE CONSUMER TO THE VOLTAGE UNBALANCE NEGATIVE SEQUENCE NETWORKS WITH ISOLATED NEUTRAL

open access: yesВестник Северо-Кавказского федерального университета, 2022
The article presents a technique for estimating the consumer's contribution to the unbalance level of the negative sequence voltage at the point of common connection.
Dmitrii Kostyukov   +2 more
doaj  

VSC control strategy for HVDC compensating negative sequence and decaying DC components

open access: yesEnergy Reports, 2023
This paper proposes a voltage source converter (VSC) control strategy for the high voltage direct current (HVDC) transmission systems compensating the negative sequence and decaying DC (DDC) components. The mathematical model of the grid fault current is
Wu Yanwei   +4 more
doaj   +1 more source

A Negative Answer to the Prime Sequence Question [PDF]

open access: yesProceedings of the American Mathematical Society, 1979
If P is a complete intersection prime, i.e., a prime ideal generated by h t ( P
openaire   +2 more sources

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