Results 1 to 10 of about 3,805,307 (284)

A New Protection Strategy Based on Negative Sequence Current Coordinated Control on the Generator Extremity

open access: yesIEEE Access, 2020
When the single-phase reclosing of the high-voltage circuit, there will be tremendous negative sequence current generation. The connection of inverter-type new energy sources may increase the negative sequence current of the power system.
Zhenxing Li   +4 more
doaj   +3 more sources

Earth Fault Location Using Negative Sequence Currents

open access: yesEnergies, 2019
In this paper, a new method for locating single-phase earth faults on non-effectively earthed medium voltage distribution networks is proposed. The method requires only current measurements and is based on the analysis of the negative sequence components
Amir Farughian   +2 more
doaj   +3 more sources

Negative affect reduces performance in implicit sequence learning. [PDF]

open access: yesPLoS ONE, 2013
BACKGROUND: It is well documented that positive rather than negative moods encourage integrative processing of conscious information. However, the extent to which implicit or unconscious learning can be influenced by affective states remains unclear ...
Junchen Shang   +4 more
doaj   +4 more sources

The Performance of a Three-Phase Induction Motor under and over Unbalance Voltage [PDF]

open access: yesTikrit Journal of Engineering Sciences, 2021
Voltage unbalance is an adverse global phenomenon impacting three-phase induction motor output. Three-phase source voltage may become imbalanced in a variety of respects, while a balanced system preserves stable voltage magnitude and angles in ...
Abdulsatar H. Jassim   +2 more
doaj   +1 more source

Model development for the analysis of reducing voltage asymmetry methods in power supply systems

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2022
THE PURPOSE. To consider the issues of ensuring the quality of electricity in power supply systems. Show that the quality of electrical energy during the operation of power supply systems in certain cases may be violated, including due to uneven loading ...
V. I. Biryulin, D. V. Kudelina
doaj   +1 more source

Interturn Short Fault Detection and Location of Permanent Magnet Wind Generator Based on Negative Sequence Current Residuals

open access: yesEnergies, 2022
This article proposes a model-based method for the detection and phase location of interturn short fault (ISF) in the permanent magnet synchronous generator (PMSG).
Tonghua Wu   +5 more
doaj   +1 more source

Sequence Control Strategy for Grid-Forming Voltage Source Converters Based on the Virtual-Flux Orientation under Balanced and Unbalanced Faults

open access: yesEnergies, 2023
Renewable power generation has increased in recent years, which has led to a decrease in the use of synchronous generators (SGs). These power plants are mainly connected to the power system through electronic converters.
Juan Dolado Fernández   +3 more
doaj   +1 more source

Study of Induction Motor Inter-Turn Fault Part II: Online Model-Based Fault Diagnosis Method

open access: yesEnergies, 2022
This paper (Part II) is a follow-up paper to our previous work on developing induction motor inter-turn fault (ITF) models (Part I). In this paper, an online ITF diagnosis method of induction motors is proposed by utilizing the negative sequence current ...
Seong-Hwan Im, Bon-Gwan Gu
doaj   +1 more source

ON THE EXPONENTIAL INEQUALITY FOR NEGATIVE DEPENDENT SEQUENCE [PDF]

open access: yesCommunications of the Korean Mathematical Society, 2007
Summary: We show an exponential inequality for negatively associated and strictly stationary random variables replacing an uniform boundedness assumption by the existence of Laplace transforms. To obtain this result we use a truncation technique together with a block decomposition of the sums.
Kim, Tae-Sung, Kim, Hyun-Chull
openaire   +1 more source

Grid-Following Voltage Source Converters: Basic Schemes and Current Control Techniques to Operate With Unbalanced Voltage Conditions

open access: yesIEEE Open Journal of the Industrial Electronics Society, 2021
The growing relevance of voltage source converters (VSCs), and the deep impact they have on the development and maintenance of the electrical grid, increase the necessity of further research on how to deal with nonideal grid conditions from the VSCs ...
Pablo Montero-Robina   +3 more
doaj   +1 more source

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