Results 21 to 30 of about 868,690 (284)

Negative-sequence current filter based on inductance coils

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, Bauyrzhan Mashrapov, Rizagul Mashrapova, Alexandr Kislov   +3 more
openaire   +3 more sources

A negative sequence current injection (NSCI)-based active protection scheme for islanded microgrids [PDF]

International Journal of Electrical Power & Energy Systems
The 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, Adam Dyśko, Agustí Egea-Àlvarez   +2 more
doaj   +3 more sources

Stator winding short-circuit fault detection in a permanent magnet synchronous motor (PMSM) using negative sequence current in time domain

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

Calculation Method and Characteristic Analysis for Fault Current of Permanent Magnet Direct-Drive Wind Power System considering Positive and Negative Sequence Decomposition

International Transactions on Electrical Energy Systems
In view of the fact that the influence of positive and negative sequence decomposition, which is widely used in positive and negative sequence decoupling control in control system, on the fault current calculation process is not deeply considered in the ...
Botong Li, Qing Zhong, Weijie Wen, Bin Li, Xiaolong Chen   +4 more
doaj   +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, LUO Wenguang, HE Duochang, ZHANG Zhixue   +3 more
doaj   +2 more sources

Characteristics and Control Strategy of Cascaded SVG with Star-configuration Considering Negative-sequence Compensation

Kongzhi Yu Xinxi Jishu, 2013
This paper illustrated var and negative sequence comprehensive compensation principles of cascaded static var generator(SVG) with star-configuration. The mathematical expression of zero-sequence voltage was deduced, and subsequently zero-sequence voltage
XIONG Qiaopo, LUO An, ZENG Zhizhen
doaj   +2 more sources

Suppression of Negative Sequence Current on HVDC Modular Multilevel Converters in Offshore Wind Power

Journal of Marine Science and Engineering
The High Voltage Direct Current (HVDC) transmission technology employing modular multilevel converters (MMCs) can effectively enhance the transmission efficiency and stability of offshore wind farms, thereby aiding the promotion of large−scale ...
Xiaoning Xu, Di Wang, Xuesong Zhou, Long Tao   +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

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