Results 21 to 30 of about 7,965 (345)

Current Control Reference Calculation Issues for the Operation of Renewable Source Grid Interface VSCs Under Unbalanced Voltage Sags [PDF]

, 2011
23/04/13 MEB.
Soto-Sanchez, DE, Diego E. Soto-Sanchez, Junyent-Ferre, A, Green, TC, Adrià Junyent-Ferre, Tim C. Green, Gomis-Bellmunt, O, Oriol Gomis-Bellmunt   +7 more
core   +1 more source

New Stationary Frame Control Scheme for Three Phase PWM Rectifiers Under Unbalanced Voltage Dips Conditions [PDF]

, 2010
A new stationary frame control scheme for three-phase pulsewidth-modulation (PWM) rectifiers operating under unbalanced voltage dips conditions is proposed in this paper.
BOJOI, IUSTIN RADU, Bojoi, R., Limongi, L.R., L. R. LIMONGI, Roiu, Daniel, Tenconi, Alberto   +5 more
core   +1 more source

Methodology for Determination of the Number of Equipment Malfunctions Due to Voltage Sags

Energies, 2017
This article deals with the assessment of the reliability of sensitive equipment due to voltage sags. The most frequent problems of power quality are voltage sags.
Alena Otcenasova, Roman Bodnar, Michal Regula, Marek Hoger, Michal Repak   +4 more
doaj   +1 more source

A transformerless active voltage quality regulator with the novel three‐leg circuit

IET Power Electronics, 2021
Voltage sags and momentary interruptions of power are the most severe voltage disturbances. Here, a tansformerless active voltage quality regulator with the novel three‐leg circuit is proposed to mitigate long duration and deep voltage sags.
Sen Wang, Yunqing Pei, Weiqing Rong, Guochun Xiao, Jingjing Huang, Jialei Zhang   +5 more
doaj   +1 more source

Testing of three-phase equipment under voltage sags [PDF]

, 2015
This paper provides insight into the testing of three-phase equipment exposed to voltage sags caused by faults. The voltage sag recovers at the fault-current zeros, leading to a ‘discrete’ voltage recovery, that is, the fault is cleared in different ...
Pedra Durán, Joaquín, Bogarra Rodríguez, Santiago, Rolán Blanco, Alejandro, Pedra Durán, Joaquim, Monjo, Lluís, Monjo Mur, Lluís, Córcoles López, Felipe, Bogarra, Santiago   +7 more
core   +1 more source

Evaluation of the impact of distributed synchronous generation on the stochastic estimation of financial costs of voltage sags

Journal of Energy in Southern Africa, 2016
Power system faults can cause voltage sags that, if they are less than voltage sensitivity threshold of equipment, can lead to interruption of supply and lead to incurring of financial losses.
N Mbuli, R Xezile, JHC Pretorius, P Sowa
doaj   +1 more source

Thermal Analysis of Power Converters for DFIG-Based Wind Energy Conversion Systems during Voltage Sags

Energies, 2022
The doubly fed induction generator (DFIG) and back-to-back converter are very sensitive to power quality disturbances in grid-connected wind energy conversion systems (WECSs).
Igor Rodrigues de Oliveira, Fernando Lessa Tofoli, Victor Flores Mendes   +2 more
doaj   +1 more source

Voltage sag assessment using an extended fault positions method and Monte Carlo simulation

Dyna, 2016
In this article, we propose an extended fault positions method combined with the Monte Carlo method to evaluate voltage sags. The distribution function SARFI is obtained by taking into account the randomness of (i) location of faults in lines, (ii ...
Jorge Washington Sagre, John Edwin Candelo, Johny Hernán Montaña Chaparro   +2 more
doaj   +1 more source

Nonlinear Control Design of Three-Level Neutral-Point-Clamped-Based High-Voltage Direct Current Systems for Enhanced Availability during AC Faults with Semi-Experimental Validation

Engineering Proceedings, 2023
This research paper addresses the issue of enhancing the operational availability of NPC three-level converter-based high-voltage direct current (HVDC) transport systems during alternating current (AC) grid fault conditions.
Ilyass El Myasse, Aziz Watil, Abdelmounime El Magri, Ambe Harrison   +3 more
doaj   +1 more source

More stability and robustness with the multi-loop control solution for dynamic voltage restorer (DVR) [PDF]

Serbian Journal of Electrical Engineering, 2009
This paper presents the application of dynamic voltage restorers (DVR) on power distribution systems for mitigation of voltage sags/swells at critical loads. DVR is one of the compensating types of custom power devices.
Abdelkhalek Othmane, Kechich Abderrahmane, Benslimane Tarek, Benachaiba Chellali, Haidas Mohammed   +4 more
doaj   +1 more source