Browsing by Author "Matas Alcalá, José"
Now showing items 1-20 of 37
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A comprehensive model for the design of a microgrid under regulatory constraints using synthetical data generation and stochastic optimization
(2020-10-26)
Article
Open AccessAs renewable energy installation costs decrease and environmentally-friendly policies are progressively applied in many countries, distributed generation has emerged as the new archetype of energy generation and distribution. ... -
A family of gradient descent grid frequency estimators for the SOGI filter
(2017-09-04)
Article
Restricted access - publisher's policyThis paper applies the adaptive gradient descent method to the second-order generalized integrator (SOGI) filter in order to find an online estimation algorithm for the grid frequency, which leads to the proposal of three ... -
A new LPF-based grid frequency estimation for the SOGI filter with improved harmonic rejection
(2018)
Conference lecture
Open AccessThis paper proposes a new method for the estimation of the grid voltage frequency using a low-pass filter (LPF) approach. The estimated frequency is used to tune a second order generalized integrator (SOGI) filter commonly ... -
A new THD measurement method with small computational burden using a SOGI-FLL grid monitoring system
(Institute of Electrical and Electronics Engineers (IEEE), 2020-06-01)
Article
Restricted access - publisher's policyThis article proposes a new method for obtaining the total harmonic distortion (THD) using few math operations, a low-pass filter (LPF), and a grid monitoring system able to provide the fundamental and harmonics components ... -
A power calculation algorithm for single-phase droop-operated-inverters considering linear and nonlinear loads HIL-assessed
(2019-11-01)
Article
Open AccessThe active and reactive powers, P and Q, are crucial variables in the parallel operation of single-phase inverters using the droop method, introducing proportional droops in the inverter output frequency and voltage amplitude ... -
Active damping control for a three phase grid-connected inverter using sliding mode control
(2013)
Conference report
Restricted access - publisher's policyThis paper proposes a ne w active damping method based on virtual resistors for three-phase grid connected voltage source inverters (VSI) with LCL filter. The use of this filters is a standard solution to provide the ... -
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
Restricted access - publisher's policyThis 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 ... -
Assessing the 2014 retroactive regulatory framework applied to the concentrating solar power systems in Spain
(2018-02-15)
Article
Open AccessThe RD 413/2014 new economic and regulatory framework applied to the concentrating solar power plants (CSPP) in Spain has been here analysed and its new remuneration scheme has been formulated, becoming evident its high ... -
Control design for multiphase synchronous buck converters based on exact constant resistive output impedance
(Institute of Electrical and Electronics Engineers (IEEE), 2013-11)
Article
Restricted access - publisher's policyThis 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 scheme for photovoltaic three-phase inverters to minimize peak currents during unbalanced grid-voltage sags
(2012)
Article
Restricted access - publisher's policyNowadays, 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)
Conference report
Restricted access - publisher's policyUnbalanced 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 ... -
Control strategy to maximize the power capability of PV three-phase inverters during voltage sags
(2016-04-01)
Article
Open AccessUnder voltage sags, grid-tied photovoltaic inverters should remain connected to the grid according to low-voltage ride-through requirements. During such perturbations, it is interesting to exploit completely the distributed ... -
Coordinated reactive power control for static synchronous compensators under unbalanced voltage sags
(2012)
Conference report
Restricted access - publisher's policyUnbalanced 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, ... -
Design and analysis of the droop control method for parallel inverters considering the impact of the complex impedance on the power sharing
(IEEE Press. Institute of Electrical and Electronics Engineers, 2011-02)
Article
Restricted access - publisher's policyThis paper investigates the characteristics of the active and reactive power sharing in a parallel inverters system under different system impedance conditions. The analyses conclude that the conventional droop method ... -
Design of an analog quasi-steady-state nonlinear current-mode controller for single-phase active power filter
(2009-12)
Article
Open AccessThe injection of sinusoidal current to an electrical grid is nowadays possible with the use of active power filters (APFs).With quasi-steady-state (QSS) nonlinear controllers, these power filters provide low ... -
DISPOSITIUS I TECNOLOGIES (Examen 1r quadrimestre)
(Universitat Politècnica de Catalunya, 2001-01-29)
Exam
Restricted access to the UPC academic community -
Fast grid synchronization technique based on a multiple cascaded general integrator scheme for distributed generation inverters
(2012)
Conference report
Restricted access - publisher's policyThis paper proposes a new structure for grid synchronization based on generalized integrators (GI) that lead to fast detection of positive and negative components of the grid voltage. The GI are used as a band pass ... -
Grid-fault control scheme for three-phase photovoltaic inverters with adjustable power quality characteristics
(2010-12-23)
Article
Restricted access - publisher's policyThe power quality of a three-phase photovoltaic (PV) inverter drastically deteriorates in the presence of grid faults with unbalanced voltages.Aripple in the injected power and an increase in the current harmonic ... -
HIL-assessed fast and accurate single-phase power calculation algorithm for voltage source inverters supplying to high total demand distortion nonlinear loads
(2020-10-07)
Article
Open AccessThe dynamic performance of the local control of single-phase voltage source inverters (VSIs) can be degraded when supplying to nonlinear loads (NLLs) in microgrids. When this control is based on the droop principles, a ...
