Results 1 to 10 of about 2,384,002 (300)

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, Lauri Kumpulainen, Kimmo Kauhaniemi   +2 more
doaj   +4 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, Aboutaleb Haddadi, Masoud Karimi-Ghartemani, Mahdieh Sadabadi   +3 more
doaj   +5 more sources

Broken Rotor Bar Fault Detection for Inverter-Fed Induction Motor with Negative-Sequence Current Analysis [PDF]

Sensors
This 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, Jianzhong Zhang, Xu Huang, Muhammad Shahzad Aziz   +3 more
doaj   +2 more sources

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

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

Energy 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, Ou Jiajun, Su Tao, Wang Bo, Wu junming   +4 more
doaj   +1 more source

Phasor-domain Dynamic Model of Asymmetric Current Injection Controller for Converter-interfaced Generator

Journal of Modern Power Systems and Clean Energy, 2021
This paper presents a controller model of asymmetric current injection for converter-interfaced generators suitable for root-mean-square (RMS) phasor-domain, fundamental-frequency, three-phase, and dynamic simulation tools.
Victor A.F. Almeida, Glauco N. Taranto, Jose M. T. Marinho   +2 more
doaj   +1 more source

Unbalanced and Reactive Currents Compensation in Three-Phase Four-Wire Sinusoidal Power Systems

Applied Sciences, 2020
In an unbalanced linear three-phase electrical system, there are inefficient powers that increase the apparent power supplied by the network, line losses, machine malfunctions, etc.
Rafael Montoya-Mira, Pedro A. Blasco, José M. Diez, Rafael Montoya, Miguel J. Reig   +4 more
doaj   +1 more source

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

Energies, 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

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

E3S 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, Yang Dongwen, He Zhi, Duan Zhenfeng, Wang Dengmei   +4 more
doaj   +1 more source

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

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, Zhihao Xie, Zhenyu Wang, Hanli Weng, Lu Wang   +4 more
doaj   +1 more source