Articles de revista
http://hdl.handle.net/2117/3930
20161020T21:48:36Z

Models and procedures for electric energy distribution planning. A review
http://hdl.handle.net/2117/90846
Models and procedures for electric energy distribution planning. A review
Sempértegui, Rodrigo; Bautista Valhondo, Joaquín; Griñó Cubero, Robert; Pereira Gude, Jordi
Distribution system planning is a key component to accomplish the service in a fast growing demand market, both from a technical point of view and from the economic costs management. In the near future, electric companies will need faster and cheaper planning tools to evaluate different scenarios and their consequences for the rest of the system and provide their clients whit safe reliable and economic energy. The objective of this paper is to review different articles about this subject trying to continue the previous work from Gonen and RamírezRosado in 1986 (Gönen,1986).
20161018T11:40:24Z
Sempértegui, Rodrigo
Bautista Valhondo, Joaquín
Griñó Cubero, Robert
Pereira Gude, Jordi
Distribution system planning is a key component to accomplish the service in a fast growing demand market, both from a technical point of view and from the economic costs management. In the near future, electric companies will need faster and cheaper planning tools to evaluate different scenarios and their consequences for the rest of the system and provide their clients whit safe reliable and economic energy. The objective of this paper is to review different articles about this subject trying to continue the previous work from Gonen and RamírezRosado in 1986 (Gönen,1986).

Evaluating the 2014 retroactive regulatory framework applied to the grid connected PV systems in Spain
http://hdl.handle.net/2117/90837
Evaluating the 2014 retroactive regulatory framework applied to the grid connected PV systems in Spain
Hoz Casas, Jordi de la; Martín Cañadas, María Elena; Miret Tomàs, Jaume; Castilla Fernández, Miguel; Guzmán Solà, Ramon
© 2016 Elsevier Ltd. The RD 413/2014 new economic and regulatory framework for producers of electricity from renewable energy sources in Spain has been here analysed, putting the focus on its impact on the economic results of the existing grid connected PV systems. A complete formulation of the new remuneration scheme is first presented, making evident its high complexity and the great number of regulatory parameters involved. Then, in order to facilitate the discernment of its operating mechanism a simplified model is proposed. This approach has proven to be a useful tool to identify the most influential regulatory parameters and also which could be the plausible future regulatory actions in order to contain the cost to the Spanish Electricity System. Finally, the NPV and the IRR among other indicators are calculated for a representative case study facility, evidencing a substantial profitability reduction in the transition from the former economic and regulatory framework to the RD 413/2014 new remuneration scheme.
20161018T10:31:08Z
Hoz Casas, Jordi de la
Martín Cañadas, María Elena
Miret Tomàs, Jaume
Castilla Fernández, Miguel
Guzmán Solà, Ramon
© 2016 Elsevier Ltd. The RD 413/2014 new economic and regulatory framework for producers of electricity from renewable energy sources in Spain has been here analysed, putting the focus on its impact on the economic results of the existing grid connected PV systems. A complete formulation of the new remuneration scheme is first presented, making evident its high complexity and the great number of regulatory parameters involved. Then, in order to facilitate the discernment of its operating mechanism a simplified model is proposed. This approach has proven to be a useful tool to identify the most influential regulatory parameters and also which could be the plausible future regulatory actions in order to contain the cost to the Spanish Electricity System. Finally, the NPV and the IRR among other indicators are calculated for a representative case study facility, evidencing a substantial profitability reduction in the transition from the former economic and regulatory framework to the RD 413/2014 new remuneration scheme.

From research to teaching: Integrating social robotics in engineering degrees
http://hdl.handle.net/2117/90816
From research to teaching: Integrating social robotics in engineering degrees
Bolea Monte, Yolanda; Grau Saldes, Antoni; Sanfeliu Cortés, Alberto
20161018T08:36:41Z
Bolea Monte, Yolanda
Grau Saldes, Antoni
Sanfeliu Cortés, Alberto

Averaged dynamics of a coupledinductor boost converter under sliding mode control using a piecewise linear complementarity model
http://hdl.handle.net/2117/90749
Averaged dynamics of a coupledinductor boost converter under sliding mode control using a piecewise linear complementarity model
Carrero Candelas, Niliana Andreina; Batlle Arnau, Carles; Fossas Colet, Enric
An averaged model of a coupledinductor boost converter using the piecewise complementarity model of the converter under sliding motions is obtained. The model takes into account the idealized voltage–current characteristic of passive switches (diodes) present in the converter. Because of its lower complexity, the averaged model is more suitable for control design purposes when compared with the linear complementarity systems (LCS) model of the converter. The dynamic performance of the LCS model and the averaged models of the converter are validated through computer simulations using Matlab.
20161013T13:52:49Z
Carrero Candelas, Niliana Andreina
Batlle Arnau, Carles
Fossas Colet, Enric
An averaged model of a coupledinductor boost converter using the piecewise complementarity model of the converter under sliding motions is obtained. The model takes into account the idealized voltage–current characteristic of passive switches (diodes) present in the converter. Because of its lower complexity, the averaged model is more suitable for control design purposes when compared with the linear complementarity systems (LCS) model of the converter. The dynamic performance of the LCS model and the averaged models of the converter are validated through computer simulations using Matlab.

Extended SMC for a standalone wound rotor synchronous generator
http://hdl.handle.net/2117/90326
Extended SMC for a standalone wound rotor synchronous generator
Muñoz Aguilar, Raúl Santiago; Dòria Cerezo, Arnau; Fossas Colet, Enric
20160929T11:44:59Z
Muñoz Aguilar, Raúl Santiago
Dòria Cerezo, Arnau
Fossas Colet, Enric

Decoupled DCLink capacitor voltage control of DCAC multilevel multileg converters
http://hdl.handle.net/2117/90151
Decoupled DCLink capacitor voltage control of DCAC multilevel multileg converters
Busquets Monge, Sergio; Griñó Cubero, Robert; Nicolás Apruzzese, Joan; Bordonau Farrerons, José
This paper studies the coupling between the capacitor voltage control loops of diodeclamped (or functionally equivalent) multilevel multileg (multiphase) dcac converters. From a complete model of the plant revealing the coupling, a simple approach consisting in multiplying the vector of control commands by a constant matrix is proposed to decouple the control problem and achieve a better controller performance. Simulation and experimental results are presented to prove the superior performance of the proposed decoupled control.
© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
20160922T16:42:18Z
Busquets Monge, Sergio
Griñó Cubero, Robert
Nicolás Apruzzese, Joan
Bordonau Farrerons, José
This paper studies the coupling between the capacitor voltage control loops of diodeclamped (or functionally equivalent) multilevel multileg (multiphase) dcac converters. From a complete model of the plant revealing the coupling, a simple approach consisting in multiplying the vector of control commands by a constant matrix is proposed to decouple the control problem and achieve a better controller performance. Simulation and experimental results are presented to prove the superior performance of the proposed decoupled control.

Fault tolerant control of a proton exchange membrane fuel cell using TakagiSugeno virtual actuators
http://hdl.handle.net/2117/90060
Fault tolerant control of a proton exchange membrane fuel cell using TakagiSugeno virtual actuators
Rotondo, Damiano; Nejjari AkhiElarab, Fatiha; Puig Cayuela, Vicenç
In this paper, a fault tolerant control (FTC) strategy for proton exchange membrane (PEM) fuel cells based on the use of virtual actuators and the Takagi Sugeno (TS) approach is proposed. The overall solution relies on adding a virtual actuator in the control loop to hide the fault from the controller point of view, allowing it to see the same plant as before the fault, such that the stability and some desired performances are preserved. The proposed methodology is based on the use of a reference model, where the resulting nonlinear error model is brought to a TakagiSugeno form using a gridding approach. The TS model is suitable for designing a controller using linear matrix inequalities (LMI)based techniques, such that the resulting closedloop error system is stable with poles placed in some desired region of the complex plane. Simulation results are used to show the effectiveness of the proposed approach.
20160920T08:42:42Z
Rotondo, Damiano
Nejjari AkhiElarab, Fatiha
Puig Cayuela, Vicenç
In this paper, a fault tolerant control (FTC) strategy for proton exchange membrane (PEM) fuel cells based on the use of virtual actuators and the Takagi Sugeno (TS) approach is proposed. The overall solution relies on adding a virtual actuator in the control loop to hide the fault from the controller point of view, allowing it to see the same plant as before the fault, such that the stability and some desired performances are preserved. The proposed methodology is based on the use of a reference model, where the resulting nonlinear error model is brought to a TakagiSugeno form using a gridding approach. The TS model is suitable for designing a controller using linear matrix inequalities (LMI)based techniques, such that the resulting closedloop error system is stable with poles placed in some desired region of the complex plane. Simulation results are used to show the effectiveness of the proposed approach.

Dynamic modeling and controllability analysis of an ethanol reformer for fuel cell application
http://hdl.handle.net/2117/89384
Dynamic modeling and controllability analysis of an ethanol reformer for fuel cell application
García, Vanesa Mariel; Lopez Null, Eduardo; Serra, Maria; Llorca Piqué, Jordi; Riera Colomer, Jordi
This work presents a controllability analysis of a low temperature ethanol reformer based on a cobalt catalyst for fuel cell application. The study is based on a nonlinear dynamic model of a reformer which operates in three separate stages: ethanol dehydrogenation to acetaldehyde and hydrogen, acetaldehyde steam reforming, and water gas shift reaction. The controllability anal
ysis is focused on the rapid dynamics due to mass balances and is based on a linear
ization of the complex nonlinear model of the reformer. RGA, CN and MRI analysis tools are applied to the linear model suggesting that a good performance can be
obtained with decentralized control for frequencies up to 0.1 rad/s.
20160824T12:41:35Z
García, Vanesa Mariel
Lopez Null, Eduardo
Serra, Maria
Llorca Piqué, Jordi
Riera Colomer, Jordi
This work presents a controllability analysis of a low temperature ethanol reformer based on a cobalt catalyst for fuel cell application. The study is based on a nonlinear dynamic model of a reformer which operates in three separate stages: ethanol dehydrogenation to acetaldehyde and hydrogen, acetaldehyde steam reforming, and water gas shift reaction. The controllability anal
ysis is focused on the rapid dynamics due to mass balances and is based on a linear
ization of the complex nonlinear model of the reformer. RGA, CN and MRI analysis tools are applied to the linear model suggesting that a good performance can be
obtained with decentralized control for frequencies up to 0.1 rad/s.

Exact interval propagation for the efficient solution of position analysis problems on planar linkages
http://hdl.handle.net/2117/89383
Exact interval propagation for the efficient solution of position analysis problems on planar linkages
Celaya Llover, Enric; Creemers, Tom Lambert; Ros Giralt, Lluís
This paper presents an interval propagation algorithm for variables in planar singleloop linkages. Given intervals of allowed values for all variables, the algorithm provides, for every variable, the whole set of values, with out overestimation, for which the linkage can actually be assembled. We show further how this algorithm can be integrated in a branchandprune search scheme, in order to solve the position analysis of general planar multiloop linkages. Experimental results are included, comparing the method’s perfor mance with that of previous techniques given for the same task.
20160824T10:56:12Z
Celaya Llover, Enric
Creemers, Tom Lambert
Ros Giralt, Lluís
This paper presents an interval propagation algorithm for variables in planar singleloop linkages. Given intervals of allowed values for all variables, the algorithm provides, for every variable, the whole set of values, with out overestimation, for which the linkage can actually be assembled. We show further how this algorithm can be integrated in a branchandprune search scheme, in order to solve the position analysis of general planar multiloop linkages. Experimental results are included, comparing the method’s perfor mance with that of previous techniques given for the same task.

Stock management in hospital pharmacy using chanceconstrained model predictive control
http://hdl.handle.net/2117/89382
Stock management in hospital pharmacy using chanceconstrained model predictive control
Jurado, Isabel; Maestre Torreblanca, José María; Velarde, Pablo; OcampoMartínez, Carlos; Fernandez, Isabel; Isla Tejera, Beatriz; del Prado, José Ramón
One of the most important problems in the pharmacy department of a hospital is stock management. The clinical needs of drugs must be satisfied with limited work labor while minimizing the use of economical resources. The complexity of the problem resides in the random nature of the drug demand and the multiple constraints that must be taken into account in every decision. In this article, chanceconstrained model predictive control is proposed to deal with this problem. The flexibility of model predictive control allows taking into account explicitly the different objectives and constraints involved in the problem while the use of chance constraints provides a tradeoff between conservativeness and efficiency. The solution proposed is assessed to study its implementation in two Spanish hospitals
20160824T10:09:12Z
Jurado, Isabel
Maestre Torreblanca, José María
Velarde, Pablo
OcampoMartínez, Carlos
Fernandez, Isabel
Isla Tejera, Beatriz
del Prado, José Ramón
One of the most important problems in the pharmacy department of a hospital is stock management. The clinical needs of drugs must be satisfied with limited work labor while minimizing the use of economical resources. The complexity of the problem resides in the random nature of the drug demand and the multiple constraints that must be taken into account in every decision. In this article, chanceconstrained model predictive control is proposed to deal with this problem. The flexibility of model predictive control allows taking into account explicitly the different objectives and constraints involved in the problem while the use of chance constraints provides a tradeoff between conservativeness and efficiency. The solution proposed is assessed to study its implementation in two Spanish hospitals