Results 11 to 20 of about 12,733,262 (289)
Earth Fault Location Using Negative Sequence Currents [PDF]
Energies, 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
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Broken Rotor Bar Fault Detection for Inverter-Fed Induction Motor with Negative-Sequence Current Analysis [PDF]
SensorsThis study examines the effectiveness of negative-sequence current analysis in identifying broken rotor bars for inverter-fed induction motors under different load and speed conditions. To improve diagnostic reliability, inverter-induced harmonics in the
Sarvarbek Ruzimov +3 more
doaj +3 more sources
A Robust Vector Current Controller with Negative-Sequence Current Capability for Grid-Connected Inverters [PDF]
Energies, 2021 This paper presents a vector current controller (in the synchronous reference, or the dq, frame) with negative-sequence current injection capability for three-phase grid-connected converters.
Houshang Karimi +3 more
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IEEE 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
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A Negative-sequence Current Injection Method to Mitigate Voltage Imbalances in Microgrids [PDF]
Eletrônica de Potência, 2011 This paper proposes a control strategy to reduce the voltage imbalances by injection of a proper negative-sequence current into the microgrid. This task can be done by each inverter connected to the microgrid in a shared way.
Gustavo M. S. Azevedo +4 more
doaj +2 more sources
A negative sequence current injection (NSCI)-based active protection scheme for islanded microgrids [PDF]
International Journal of Electrical Power & Energy SystemsThe growing penetration of converter interfaced generation creates unprecedented challenges to protection strategies at all voltage levels. This paper proposes a novel Negative Sequence Current Injection (NSCI)-based active protection scheme for islanded
Zhenkun Yang +2 more
doaj +5 more sources
Revista EIA, 2019 This paper studied the use of a new stator current feature for detection of winding and cage bars faults in an induction motor, and presents the experimental validation of a detection and identification scheme using Support Vector Machines (SVM). This validation was performed in a test bed using 2 HP, 4 pole motors in which shorted winding and broken ...
Castillo, Silvia Oviedo +1 more
openaire +4 more sources
Negative-sequence current filter based on inductance coils [PDF]
International Journal of Electrical and Computer Engineering (IJECE)The construction of new relay protection systems without the use of current transformers is a fundamental problem of electro energetics, which has not yet been solved. This works suggests a negative-sequence current filter which receives information from inductance coils (ICs) mounted at a safe distance in the magnetic field of phase currents.
Mark Kletsel +3 more
openaire +2 more sources
Analysis and Compensation of Negative Phase-sequence for Traction Transformer
Kongzhi Yu Xinxi Jishu, 2014 It analyzed the characteristics of negative phase-sequence current for traction transformers with different connection types under different loads. The three-phase current asymmetry degree of traction transformers is serious under both traction load and ...
SHI Minghui +3 more
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Ingeniería e Investigación, 2009 A negative sequence analysis in time domain was applied to fault detection of permanent magnet synchronous motors (PMSM). The fundamental components of the motor terminal currents were obtained using a Notch filter, based on which the negative se- quence
Jabid E. Quiroga
doaj +1 more source