Results 41 to 50 of about 268,494 (187)

On-Line Current-Based Condition Monitoring and Fault Diagnosis of Three-Phase Induction Motor [PDF]

Engineering and Technology Journal, 2007
A stator current measurement has an important role in condition monitoring and fault diagnosis of induction motors. For instance, the eccentricity, rotor bars and end ring breaks, shorted stator windings can be detected by analyses based on stator ...
K. Krikor, Ali Numan
doaj   +1 more source

Capability of DFIG WTS to ride through recurring asymmetrical grid faults

, 2014
The Wind Turbine Systems (WTS) are required to ride through recurring grid faults in some countries. In this paper, the capability of Doubly Fed Induction Generator (DFIG) WTS to ride through recurring asymmetrical grid faults is evaluated and compared ...
Chen, Wenjie, Xu, Dehong, Chen, Min, Wenjie Chen, Blaabjerg, Frede; id_orcid, Frede Blaabjerg, Min Chen, Dehong Xu   +7 more
core   +1 more source

Coordinated Low-Voltage Ride-Through Control of a Flywheel-Assisted Permanent-Magnet Direct-Drive Wind Power System Under Asymmetrical Grid Faults

Energies
To address fault-period DC-link overvoltage, the reduction in grid-side active-power regulation margin caused by reactive-current-priority operation, and the double-frequency current fluctuation induced by negative-sequence components under asymmetrical ...
Dahai Guo, Guangchen Liu, Jianwei Zhang, Guizhen Tian, Sufang Wen, Zicheng He, Yan Wang   +6 more
doaj   +1 more source

Detection and Diagnosis of Motor Stator Faults using Electric Signals from Variable Speed Drives [PDF]

, 2015
Motor current signature analysis has been investigated widely for diagnosing faults of induction motors. However, most of these studies are based on open loop drives.
Shaeboub, Abdulkarim, Gu, Fengshou, Hu, Niaoqing, Ball, Andrew, Abusaad, Samieh   +4 more
core   +4 more sources

Overcurrent Limitation and Enhanced Fault Current Utilization by Grid-Forming Inverter Using Hybrid Methods During Short Circuit Faults

IEEE Access
The next-generation grid-forming (GFM) inverters face significant over-current and over-voltage challenges during grid faults due to their inherent voltage source behaviour behind impedance. These challenges are mitigated by simultaneously reconstructing
Jack Benjamin, Animesh Kumar Sahoo, Pratyasa Bhui   +2 more
doaj   +1 more source

Real-Time Discrimination of Symmetrical Faults from Power Swings [PDF]

Iranian Journal of Electrical and Electronic Engineering, 2023
For reliable operation, distance relays have to be blocked in case of stable power swings (SPSs). Because these relays are prone to detect an SPS as a symmetrical 3-phase fault according to their symmetric nature.
H. Yaghobi
doaj  

Fault characteristic analysis of photovoltaic inverter considering negative sequence control strategy

Zhejiang 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, HUANG Tao, XIE Hua, ZHAO Qingchun   +3 more
doaj   +1 more source

Fast fault detection during power swing on a hybrid transmission line using WPT

IET Generation, Transmission & Distribution, 2019
This paper presents a new technique for very high speed detection of fault during power swing on a hybrid transmission line consisting of an overhead line and an underground cable.
Bikash Patel, Parthasarathi Bera
doaj   +1 more source

Control Strategy for a Grid-Connected Inverter under Unbalanced Network Conditions—A Disturbance Observer-Based Decoupled Current Approach

Energies, 2017
This paper proposes a new approach on the novel current control strategy for grid-tied voltage-source inverters (VSIs) with circumstances of asymmetrical voltage conditions.
Emre Ozsoy, Sanjeevikumar Padmanaban, Lucian Mihet-Popa, Viliam Fedák, Fiaz Ahmad, Rasool Akhtar, Asif Sabanovic   +6 more
doaj   +1 more source

Influence Mechanism and Suppression Control of the MMC on Short-Circuit Current Under AC Faults

IEEE Access, 2020
Modular multilevel converter based high voltage direct current (MMC-HVDC) transmission systems may increase the short-circuit current and affect the AC fault clearing of circuit breakers.
Jian Yang, Shurui Mao, Xiaodong Li, Zheng Xu   +3 more
doaj   +1 more source