Results 21 to 30 of about 1,560,331 (368)

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

Power quality disturbances assessment during unintentional islanding scenarios. A contribution to voltage sag studies [PDF]

, 2019
This paper presents a novel voltage sag topology that occurs during an unintentional islanding operation (IO) within a distribution network (DN) due to large induction motors (IMs).
Bosch Tous, Ricardo, Casals Torrens, Pau, Serrano Fontova, Alexandre   +2 more
core   +2 more sources

A Coordinated Optimal Feedback Control of Distributed Generators for Mitigation of Motor Starting Voltage Sags in Distribution Networks

IEEE transactions on industry applications, 2020
This article proposes a coordinated optimal feedback control approach to mitigate the induction motor starting voltage sag and support the transient restoration in distribution networks.
Sumaiya Hasan, A. Nair, Rojan Bhattarai, S. Kamalasadan, K. Muttaqi   +4 more
semanticscholar   +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

Simulation-based Analysis of a Dynamic Voltage Restorer under Different Voltage Sags with the Utilization of a PI Controller

, 2020
Power quality problems are becoming a major issue. Every utility company consumer desires to receive steady-state voltage, i.e. a sinusoidal waveform of constant frequency as generated at power stations, but the influence of disturbances in the shape of ...
A. Soomro, A. S. Larik, M. A. Mahar, A. A. Sahito, I. A. Sohu   +4 more
semanticscholar   +1 more source

Voltage sags: energy and severity index assessment

Revista UIS Ingenierías, 2019
An estimate of the energy not supplied by the network operator is made to quantify users affected by voltage sags. The calculation method imposed by the normative to evaluate the effect of voltage sags does not contemplate the dynamic behavior of this ...
Andres Felipe Guerrero-Guerrero, Armando Ustariz-Farfan, Eduardo Cano-Plata, Alejandro Gil-Restrepo, Carlos Rojas-Montano, Juan Orozco-Clavijo, Andrés Guerrero-Guerrero, Oscar Ruiz-Guzman   +7 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

PI-based controller for low-power distributed inverters to maximise reactive current injection while avoiding over voltage during voltage sags [PDF]

, 2018
This paper is a postprint of a paper submitted to and accepted for publication in IET Power Electronics and is subject to Institution of Engineering and Technology Copyright.
Camacho Santiago, Antonio, Castilla Fernández, Miguel, García de Vicuña Muñoz de la Nava, José Luis, Garnica López, Miguel Andrés, Miret Tomàs, Jaume   +4 more
core   +2 more sources