Results 11 to 20 of about 2,400,147 (293)

Study of Induction Motor Inter-Turn Fault Part I: Development of Fault Models with Distorted Flux Representation

open access: yesEnergies, 2022
An inter-turn fault (ITF) is one of the most frequent induction motor faults; thus, many previous works have studied its model and diagnosis. However, previous works, simplifying the specific distorted flux distribution by the ITF, presented induction ...
Seong-Hwan Im, Bon-Gwan Gu
doaj   +1 more source

Research on a Three-Phase Energy Mutual-Aid Strategy for a Grid-Connected Inverter Based on Constructed Negative Sequence Current Control

open access: yesApplied Sciences, 2023
With the increased grid-connected capacity of a single-phase distributed power supply, three-phase power unbalance is more likely to occur in a power grid.
Zhenao Sun, Dazhong Ma, Qiuye Sun
doaj   +1 more source

Turn-to-Turn Fault Diagnosis on Three-Phase Power Transformer Using Hybrid Detection Algorithm

open access: yesApplied Sciences, 2021
A power transformer (PT) in power generation or transmission is critical to maintaining electrical continuity. Fault detection on a PT is needed, especially of incipient faults, which are often caused by a turn-to-turn fault (TTF) before it develops into
Chien-Hsun Liu   +2 more
doaj   +1 more source

Practical calculation of asymmetric short circuit current of DFIG connected to distribution network [PDF]

open access: yesE3S Web of Conferences, 2020
In view of the existing complex analytic calculations of DFIG short-circuit current are hardly applied in engineering projects, a practical calculation of asymmetric short-circuit current of DFIG is proposed.
Fu Pengwu   +4 more
doaj   +1 more source

Weak-Grid Tolerant Positive- and Negative-Sequence Current Control of Voltage-Source Converters [PDF]

open access: yes2021 IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe), 2021
Peer ...
Kukkola, Jarno   +4 more
openaire   +3 more sources

Co-ordinated Control Strategy for Hybrid Wind Farms with PMSG and FSIG under Unbalanced Grid Voltage Condition [PDF]

open access: yes, 2016
This paper investigates a control strategy for a wind farm with the direct-driven permanent-magnet synchronous generators (PMSG)-based wind turbines and the fixed speed induction generators (FSIG)-based wind turbines under unbalanced grid voltage ...
Chen, Zhe   +5 more
core   +2 more sources

Control of DFIG based wind generation systems under unbalanced network supply [PDF]

open access: yes, 2007
This paper develops a dynamic model and control scheme for DFIG systems to improve the performance and stability under unbalanced grid conditions. A dynamic DFIG model containing the positive and negative sequence components is presented using stator ...
Wang, Yi, Xu, L.
core   +1 more source

Research on Life Loss of Generator Retainer Caused by Negative Sequence Current [PDF]

open access: yesJournal of Physics: Conference Series, 2021
Abstract With a large number of wind and solar power sources connected to the power grid, higher requirements are put forward for the power generation equipment to respond to the power grid imbalance. The safety research of generator rotor retaining ring under the impact of negative sequence current is of great significance.
Yong Wang   +3 more
openaire   +1 more source

Active Control Method for Torsional Vibration of DFIG Drive Chain Under Asymmetric Power Grid Fault

open access: yesIEEE Access, 2020
When the asymmetric fault occurs in power grid, it will cause the oscillation of the electromagnetic torque of the doubly-fed induction generator(DFIG).
Shiji Tian   +4 more
doaj   +1 more source

Characteristics of broadband lightning emissions associated with terrestrial gamma ray flashes [PDF]

open access: yes, 2011
To characterize lightning processes that produce terrestrial gamma ray flashes (TGFs), we have analyzed broadband (
Cummer, Steven A.   +5 more
core   +2 more sources

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