Browsing by Author "Griñó Cubero, Robert"
Now showing items 1-20 of 93
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A behavioural dynamic model for constant power loads in single-phase AC systems
(2021-09-01)
Article
Restricted access - publisher's policyConstant power loads (CPLs) in power systems have a destabilizing effect that gives rise to significant oscillations or to network collapse, motivating the development of new methods to analyse their effect in AC and DC ... -
A cyclo-dissipativity framework for power factor compensation of electrical circuits
(2005-10)
Conference report
Open AccessThe purpose of this paper is to bring the attention of the control community some of the aspects of the practically important, and mathematically challenging, power factor compensation problem. Our main contribution is ... -
A feedback-based L-2-norm limiter for periodic signals
(2011-01)
Article
Restricted access - publisher's policyLimiting the rms value (L2 norm) of periodic signals can be a necessity in some controllers for power electronic devices. The prevailing existing solution is simply to compute, off-line, the L2 norm and then to multiply ... -
A local stability condition for dc grids with constant power loads
(2017-07-01)
Article
Open AccessCurrently, there are an increasing number of power electronics converters in electrical grids, performing the most diverse tasks, but most of them, work as constant power loads (CPLs). This work presents a sufficient ... -
A new passive repetitive controller for discrete-time finite-frequency positive-real systems
(IEEE Control Systems Society, 2007)
Conference report
Open AccessThis work proposes a new repetitive controller for discrete-time finite-frequency positive-real systems which are required to track periodic references or to attenuate periodic disturbances. The main characteristic of the ... -
A passive repetitive controller for discrete-time finite-frequency positive-real systems
(Institute of Electrical and Electronics Engineers (IEEE), 2009-04)
Article
Open AccessThis work proposes and studies a new internal model for discrete-time passive or finite-frequency positive-real systems which can be used in repetitive control designs to track or to attenuate periodic signals. The main ... -
A relay controller with parallel feed-forward compensation for a buck converter feeding constant power loads
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference report
Open AccessA simple and efficient analog direct voltage control design for improving the performance and stability of a buck converter feeding constant power loads (CPLs) is the main aim of this article. One of the oldest and most ... -
A repetitive controller for discrete-time passive systems
(2006-10-23T14:07:36Z)
Research report
Open AccessThis work proposes and studies a new repetitive controller for discrete-time systems which are required to track or to attenuate periodic signals. The main characteristic of the proposed controller is its passivity. This ... -
A robust grid current controller with grid harmonic and filter resonance damping capabilities using a closed-loop admittance shaping
(IEEE Press, 2017)
Conference report
Open AccessThis paper presents a grid current control of a grid connected Voltage Source Converter (VSC) with an LCL filter. The control method enables to shape the input admittance of the converter in addition to track a given current ... -
A transient model for RF cavity analysis under beam loading
(2010-04)
Article
Restricted access - publisher's policyThere are two important considerations in the development of an electrical model for RF cavities to be used for system analysis or LLRF loop design, being: transient response and cavity impedance mismatch. In the literature, ... -
Active damping of a DC network with a constant power load: an adaptive observer-based design
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference report
Open AccessThis paper proposes a nonlinear, output feedback, adaptive controller to increase the stability margin of a direct-current (DC), small-scale, electrical network containing an unknown constant power load. Due to their ... -
Active damping of a DC network with a constant power load: an adaptive passivity-based control approach
(2018)
Conference lecture
Open AccessThis paper proposes a nonlinear, adaptive controller to increase the stability margin of a direct-current (DC) small-scale electrical network containing a constant power load, whose value is unknown. Due to their negative ... -
Active damping: an Hinf model reference approach
(Institute of Electrical and Electronics Engineers (IEEE), 2018-08-01)
Article
Open AccessThis paper focuses on the design of an active-damping controller that shapes the dynamics of an LCL grid connected voltage source converter (VSC) to mimic an L-filter connected VSC. This makes possible to use simpler ... -
Adaptive control-based voltage regulation of a magnetically coupled multiport DC-DC converter for electrified vehicles applications
(2020)
Conference report
Open AccessThis paper presents an adaptive control-based strategy to regulate the output voltage of a a magnetically coupled multiport dc-dc converter aimed at automotive applications. The proposed algorithm renders robustness to ... -
Adaptive neural network state predictor and tracking control for nonlinear time-delay systems
(2010-02)
Article
Restricted access - publisher's policyA new adaptive nonlinear state predictor (ANSP) is presented for a class of unknown nonlinear systems with input time-delay. A dynamical identification with neu- ral network (NN) is constructed to obtain NN weights and ... -
Admittance-shaped Hinf current controller for grid-connected VSC
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyThis paper introduces an H8 current controller that allows the shaping of power converters’ input admittance in frequency domain, allowing to define not only its magnitude but also its phase. In addition to admittance ... -
An adaptive observer-based controller design for active damping of a DC network with a constant power load
(2021)
Article
Open AccessThis article explores a nonlinear, adaptive controller aimed at increasing the stability margin of a direct-current (dc), small-scale, electrical network containing an unknown constant power load (CPL). Due to its negative ... -
Análisis y diseño de controladores lineales para el convertidos elevador ("boost") bidireccional en corriente
(2005-07)
Research report
Open AccessLos convertidores de voltaje DC-DC juegan dentro de la tecnología actual un papel fundamental, actúan como puentes de transferencia de energía entre fuentes y cargas, ambas de corriente continua, que no son compatibles por ... -
Comparison of first- and second-order sliding-mode controllers for a dc-dc dual active bridge
(Institute of Electrical and Electronics Engineers (IEEE), 2022-04-12)
Article
Open AccessThis paper compares four sliding-mode control strategies for a dual active bridge. The proposed control algorithms define different switching functions resulting in first-and second-order controllers, and using both ... -
Comprehensive high speed automotive SM-PMSM torque control stability analysis including novel control approach
(2019-07-01)
Article
Open AccessPermanent magnet synchronous machines (PMSM) are widely used in the automotive industry for electric vehicle (EV) and hybrid electric vehicle (HEV) propulsion systems, where the trend is to achieve high mechanical speeds. ...
