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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 +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 +7 more
core +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 +2 more
doaj +1 more source
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 +2 more
doaj +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 +7 more
doaj +1 more source
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 +3 more
doaj +1 more source
New factor for voltage sags characterization
Revista Facultad de Ingeniería Universidad de Antioquia, 2012 A new factor which allows characterizing voltage sags in an individual way is presented in this paper. The factor acts revises and identifies voltage sags in a univocal way.
Edwin García Quintero +2 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 +4 more
doaj +1 more source
Voltage sags in power distribution networks [PDF]
, 2005 Voltage sags have become increasingly important when considering the various power quality issues that cause inconvenience to customers. For some customers voltage sags cause especially high costs. Thus, power distribution companies should understand the
Heine, Pirjo
core +1 more source
Dual 3-Phase Bridge Multilevel Inverters for AC Drives with Voltage Sag Ride-through Capability
Energies, 2019 One of the main power quality issues that can affect variable speed drives (VSDs) is the occurrence of voltage sags on their AC power supply. Voltage sags can affect the inverter nominal operation, leading to a malfunction of the AC motor.
Vitor Fernão Pires +2 more
doaj +1 more source