Exploració per tema "Voltage regulators"
Ara es mostren els items 1-20 de 57
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A communication-assisted protection scheme for direct-current distribution networks
(2016-05-27)
Article
Accés obertOne of the major issues associated with the implementation of direct-current distribution systems is the design of a proper protection scheme. The fault current characteristics in direct-current distribution systems are ... -
Active and reactive power strategies with peak current limitation for distributed generation inverters during unbalanced grid faults
(Institute of Electrical and Electronics Engineers (IEEE), 2015-03-01)
Article
Accés obertDistributed generation inverters have become a key element to improve grid efficiency and reliability, particularly during grid faults. Under these severe perturbations, inverter-based power sources should accomplish ... -
An adaptive prefiltering method to improve the speed/accuracy tradeoff of voltage sequence detection methods under adverse grid conditions
(Institute of Electrical and Electronics Engineers (IEEE), 2013-07-23)
Article
Accés restringit per política de l'editorialThis paper deals with the improvement of the transient response and harmonic, subharmonic, and dc-offset voltage rejection capability of a grid voltage sequence detection scheme based on a second-order generalized integrator ... -
An efficient CMOS LDO-assisted DC/DC buck regulator
(2016)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, a new structure based on linear-assisted DC-DC buck converter principle is proposed. Using a segmented LDO regulator instead of the conventional linear one in the hybrid scheme, reduces the difference between ... -
Analysis of current and voltage indicators in grid connected PV (photovoltaic) systems working in faulty and partial shading conditions
(2015-06-12)
Article
Accés obertTo ensure the optimization of the energy generated by grid connected PV (photovoltaic) systems is necessary to plan a strategy of automatic fault detection. The analysis of current and voltage indicators have demonstrated ... -
Analysis of the contribution of a battery bank to voltage regulation in a distribution system
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialDue to demand of higher power quality, reliability and efficiency levels, the penetration of distributed energy resources increased through the past years. Thus, several studies on the different types of electrical energy ... -
Avoiding overvoltage problems in three-phase distributed-generation systems during unbalanced voltage sags
(2020-02-01)
Article
Accés obertDuring voltage sags, distributed generation systems must fulfil specific grid-code requirements for reactive current injection. This ancillary service can produce overvoltage problems in networks operating in unbalanced ... -
Behaviour of the doubly fed induction generator exposed to unsymmetrical voltage sags
(2012-09)
Article
Accés restringit per política de l'editorialThis study analyses the dynamic behaviour of the doubly fed induction generator exposed to unsymmetrical voltage sags, providing insights into wind turbine fault ride-through capability. The sags are assumed to be caused ... -
Capacitor-less linear-assisted DC-DC regulators as candidate topology for photovoltaic solar facilities
(2016)
Text en actes de congrés
Accés restringit per política de l'editorialLinear-assisted DC/DC converters (or linear-switching hybrid DC/DC converters) consist of a voltage linear regulator (classic NPN or nMOS topologies and LDO) connected in parallel with a switching DC/DC converter. They are ... -
Capacitorless low–dropout regulator for power management applications
(2019)
Comunicació de congrés
Accés obertThis article aims to present the design of a 4.5-V, 450-mA low drop-out (LDO) voltage linear regulator based on a two-stage cascoded operational transconductance amplifier (OTA) as error amplifier. The aforementioned ... -
Common-mode voltage mitigation strategies using sigma-delta modulation in five-phase VSIs
(Institute of Electrical and Electronics Engineers (IEEE), 2022-10)
Article
Accés obertVarious sigma–delta ( S ¿ ) modulation techniques for reducing the maximum peak-to-peak amplitude of common-mode voltage (CMV) by 80% in a five-phase, high-frequency voltage source inverter (VSI) are proposed and evaluated ... -
Comparison of two voltage control strategies for a wind power plant
(IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialLarger percentages of wind power penetration translate to more demanding requirements from grid codes. Recently, voltage support at the point of connection has been introduced by several grid codes from around the world, ... -
Consensus for active power sharing and frequency restoration in islanded microgrids subject to drifting clocks
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialThe application of consensus theory in the control of islanded microgrids (MG) is gaining increased attention because it facilitates the development of distributed control solutions. In particular, its application to active ... -
Control design for multiphase synchronous buck converters based on exact constant resistive output impedance
(Institute of Electrical and Electronics Engineers (IEEE), 2013-11)
Article
Accés restringit per política de l'editorialThis paper describes a control design methodology based on output impedance analysis for multiphase synchronous buck converters. This design leads to an optimal output voltage transient response. Two design alternatives ... -
Control i simulació de convertidors operant en mode Grid-Forming
(Universitat Politècnica de Catalunya, 2020-07-09)
Treball Final de Grau
Accés obertAquest treball de fi de grau pret ́en donar a con`eixer i analitzar l’estrat`egia de control de convertidors anomenada grid-forming. Es tracta d’una tecnologia molt recent i innovadora, que requereix a dia d’avui de molta ... -
Control scheme for photovoltaic three-phase inverters to minimize peak currents during unbalanced grid-voltage sags
(2012)
Article
Accés restringit per política de l'editorialNowadays, the majority of the photovoltaic (PV) power sources are connected to the public grid. One of the main connection problems occurs when voltage sags appear in the grid due to short circuits, lightning, etc. ... -
Control strategies based on effective power factor for distributed generation power plants during unbalanced grid voltage
(2013)
Text en actes de congrés
Accés restringit per política de l'editorialUnbalanced voltages in three-phase power systems is a common perturbation propagated along the grid. Distributed Generation plants have gained widespread attention due to their capability to improve power quality in a ... -
Coordinated reactive power control for static synchronous compensators under unbalanced voltage sags
(2012)
Text en actes de congrés
Accés restringit per política de l'editorialUnbalanced voltage sags strongly deteriorate the performance of power converters and electrical machines connected to the distribution network. In particular, a reduction of the power quality is noticed in these equipments, ... -
Decoupled simultaneous complex power sharing and voltage regulation in islanded AC microgrids
(Institute of Electrical and Electronics Engineers (IEEE), 2023-04)
Article
Accés restringit per política de l'editorialIn islanded AC microgrids, when multiple voltage source inverters (VSIs) operate in parallel, it is challenging to simultaneously obtain both accurate complex (active and reactive) power sharing and voltage regulation (in ... -
Design and coordination of a capacitor and on-load tap changer system for voltage control in a wind power plant of doubly fed induction generator wind turbines
(2011-05-26)
Article
Accés restringit per política de l'editorialIn this paper, a novel coordination and control strategy for capacitor banks and on-load tap changer for a wind power plant is introduced. The capacitor banks are controlled in such way that the steady-state usage of the ...