Francisco Ruz | Universidad Politecnica de Cartagena (original) (raw)

Papers by Francisco Ruz

Research paper thumbnail of On the Term Set’s Semantics for Pairwise Comparisons in Fuzzy Linguistic Preference Models

Research paper thumbnail of An integrative approach to the design methodology for 3-phase power conditioners in Photovoltaic Grid-Connected systems

Energy Conversion and Management, 2012

ABSTRACT

Research paper thumbnail of Review of NZEB Criteria: Design of Life Containers in Operations Area

Energies, 2022

The Spanish Ministry of Defense is currently attempting to reduce the amount of energy that is co... more The Spanish Ministry of Defense is currently attempting to reduce the amount of energy that is consumed by its military bases and has therefore raised concerns about how to make their facilities more energy efficient. To fulfill this objective, the Spanish army has developed various studies and projects, as well as a technical prescription sheet that defines the thermal transmittance values of the materials that are to be used to construct the different elements of the containers that make up the temporary housing units at Spanish military camps. Both governments and private entities have developed initiatives that are aimed at improving the energy efficiency of buildings, which are classified into two groups: those aimed at the development of mandatory building codes and those that are based on voluntary certification programs. The use of passive strategies is one of the key actions that is being implemented to achieve the NZEB category, as its first requirement is to be a “very lo...

Research paper thumbnail of Desarrollo Del Equipo Del Proyecto: Autorrealización De Los Miembros Del Equipo

Research paper thumbnail of Configuracion de puesta a tierra del neutro en medio tension para mejora de la calidad del suministro

Universitat Politècnica de València, 1999

Research paper thumbnail of Comparativa de estándares de certificación de edificios consumo casi nulo. Requerimientos de aislamiento térmico

Research paper thumbnail of Comprehensive device management microproduction of energy? To electricity

Device integral management microproduction power. # Said device (1) is a hardware platform with a... more Device integral management microproduction power. # Said device (1) is a hardware platform with a given schedule which is integrated into a single device control all elements of an installation of micro power (2) and a control over operations of an interconnecting device (3) with main power supply (5) and controlled by a global network manager; so that the slogans of power generation can be set from two distinct systems of decision and coordinated: an internal one based on the interests of the owner of that facility (2) and an external depending on the needs of the rest of the network.

Research paper thumbnail of Sensitivity threshold analisys for DDA high impedance fault detection algorithm

Research paper thumbnail of Object Oriented Architecture of a Load Composition Identification System at Distribution Level

A proper load representation is necessary in order to obtain the maximum benefits from a power fl... more A proper load representation is necessary in order to obtain the maximum benefits from a power flow or a dynamic performance analysis. The actual behaviour of the load depends on the load composition, which varies from bus to bus of the system, time, weather etc. Therefore to en- hance the load model representation at a point in the system it

Research paper thumbnail of Efecto del arco en fusibles limitadores y de corte integral: comparación de resultados y análisis

Research paper thumbnail of Fuzzy multicriteria decision making applied to the strategic plan of Valencia

Research paper thumbnail of Last Planner Control System Applied to a Chemical Plant Construction

Journal of Construction Engineering and Management, 2012

Research paper thumbnail of DSTRP: A new algorithm for high impedance fault detection in compensated neutral grounded M.V. power systems

European Transactions on Electrical Power, 2003

The detection algorithms depend on the network topology, the neutral grounding of the secondary w... more The detection algorithms depend on the network topology, the neutral grounding of the secondary winding in H. V./M V. transformers being one of the main factors to consider. In compensated distribution systems, we need complex detection algorithms based on network parameters estimation. The neutral voltage is the most sensitive magnitude to detect an unusual situation but it is not a selective parameter. In this paper we present the new DSTRP that calculates the influence of each feeder asymmetry in neutral voltage. We also analyze the measurement errors influence that limits the sensitivity threshold of this algorithm.

Research paper thumbnail of A fuzzy multi-criteria decision-making model for construction contractor prequalification

Automation in Construction, 2012

Selecting an appropriate contractor is essential for the success of any construction project. Con... more Selecting an appropriate contractor is essential for the success of any construction project. Contractor prequalification procedure makes it possible to admit for tendering only competent contractor. Prequalification is a multi-criteria decision problem that is, in essence, largely dependent on the uncertainty and vagueness in the nature of construction projects and subjective judgement of the decision-maker. This paper presents a systematic prequalification procedure, based on Fuzzy Set Theory, whose main differences and advantages in comparison with other models are the use of an algorithm to handle the inconsistencies in the fuzzy preference relation when pair-wise comparison judgements are used and the use of linguistic assessment or exact assessment of performance of the contractors on qualitative or quantitative criterion, respectively. Finally, a case study for the rehabilitation project of a building at Technical University of Cartagena is presented to illustrate the use of the proposed model and to demonstrate its effectiveness.

Research paper thumbnail of Real time test benchmark design for photovoltaic grid-connected control systems

Electric Power Systems Research, 2011

This paper presents a dual digital signal processor (DSP) hardware architecture for a grid-connec... more This paper presents a dual digital signal processor (DSP) hardware architecture for a grid-connected photovoltaic interface test benchmark, based on a cascade DC/DC converter and DC/AC inverter, with coordinated control algorithms. The control hardware has been designed to test distributed generation (DG) interfaces to be integrated in a hierarchical structure of computational agents, to apply distributed control techniques to the power system management. The proposed dual DSP architecture enables the programming of the control software for the DC/DC converter and the DC/AC inverter in the same processor, to keep the other one for additional operations that are required when there is a high degree of interaction between the DG 2 unit and the rest of the electrical grid components. The hardware architecture has been tested in several real situations such as power factor correction and anti-islanding protection.

Research paper thumbnail of Results using Different Reactive Power Definitions for Wind Turbines Submitted to Voltage Dips: Application to the Spanish Grid Code

2006 IEEE PES Power Systems Conference and Exposition, 2006

Abstract—This article adds the Spanish grid code to the previously published works about the comp... more Abstract—This article adds the Spanish grid code to the previously published works about the comparison of international regulations for connection of wind turbines to the network. Specifically, is focused on the reactive power generated by wind turbines when they are ...

Research paper thumbnail of Results using different reactive power definitions for wind turbines submitted to voltage dips: Application to the spanish grid code

… , 2006. PSCE'06. …, 2006

Abstract—This article adds the Spanish grid code to the previously published works about the comp... more Abstract—This article adds the Spanish grid code to the previously published works about the comparison of international regulations for connection of wind turbines to the network. Specifically, is focused on the reactive power generated by wind turbines when they are ...

Research paper thumbnail of DSTRP A new algorithm for high impedance fault detection

The detection algorithms depend on the network topology, the neutral grounding of the secondary w... more The detection algorithms depend on the network topology, the neutral grounding of the secondary winding in H.V./M.V. transformers being one of the main factors to consider. In compensated distribution systems, we need complex detection algorithms based in network parameters estimation.

Research paper thumbnail of Last planner control system applied to a chemical plant construction

The main difference between the Last Planner production control system developed by Ballard and c... more The main difference between the Last Planner production control system developed by Ballard and classical control systems is the way in which projects are controlled and planned. The Last Planner system focuses on controlling production units, workflows and the quality of the performed work. It also permits the identification of the causes for the non-completion of planned work and decision making in accordance with the project requirements so that actions are timely and productivity is increased.

Research paper thumbnail of A fuzzy multi-criteria decision making model for construction contractor prequalification

Selecting an appropriate contractor is essential for the success of any construction project. Con... more Selecting an appropriate contractor is essential for the success of any construction project. Contractor prequalification procedure makes it possible to admit for tendering only competent contractor. Prequalification is a multi-criteria decision problem that is, in essence, largely dependent on the uncertainty and vagueness in the nature of construction projects and subjective judgement of the decision-maker. This paper presents a systematic prequalification procedure, based on Fuzzy Set Theory, whose main differences and advantages in comparison with other models are the use of an algorithm to handle the inconsistencies in the fuzzy preference relation when pair-wise comparison judgements are used and the use of linguistic assessment or exact assessment of performance of the contractors on qualitative or quantitative criterion, respectively. Finally, a case study for the rehabilitation project of a building at Technical University of Cartagena is presented to illustrate the use of the proposed model and to demonstrate its effectiveness.

Research paper thumbnail of On the Term Set’s Semantics for Pairwise Comparisons in Fuzzy Linguistic Preference Models

Research paper thumbnail of An integrative approach to the design methodology for 3-phase power conditioners in Photovoltaic Grid-Connected systems

Energy Conversion and Management, 2012

ABSTRACT

Research paper thumbnail of Review of NZEB Criteria: Design of Life Containers in Operations Area

Energies, 2022

The Spanish Ministry of Defense is currently attempting to reduce the amount of energy that is co... more The Spanish Ministry of Defense is currently attempting to reduce the amount of energy that is consumed by its military bases and has therefore raised concerns about how to make their facilities more energy efficient. To fulfill this objective, the Spanish army has developed various studies and projects, as well as a technical prescription sheet that defines the thermal transmittance values of the materials that are to be used to construct the different elements of the containers that make up the temporary housing units at Spanish military camps. Both governments and private entities have developed initiatives that are aimed at improving the energy efficiency of buildings, which are classified into two groups: those aimed at the development of mandatory building codes and those that are based on voluntary certification programs. The use of passive strategies is one of the key actions that is being implemented to achieve the NZEB category, as its first requirement is to be a “very lo...

Research paper thumbnail of Desarrollo Del Equipo Del Proyecto: Autorrealización De Los Miembros Del Equipo

Research paper thumbnail of Configuracion de puesta a tierra del neutro en medio tension para mejora de la calidad del suministro

Universitat Politècnica de València, 1999

Research paper thumbnail of Comparativa de estándares de certificación de edificios consumo casi nulo. Requerimientos de aislamiento térmico

Research paper thumbnail of Comprehensive device management microproduction of energy? To electricity

Device integral management microproduction power. # Said device (1) is a hardware platform with a... more Device integral management microproduction power. # Said device (1) is a hardware platform with a given schedule which is integrated into a single device control all elements of an installation of micro power (2) and a control over operations of an interconnecting device (3) with main power supply (5) and controlled by a global network manager; so that the slogans of power generation can be set from two distinct systems of decision and coordinated: an internal one based on the interests of the owner of that facility (2) and an external depending on the needs of the rest of the network.

Research paper thumbnail of Sensitivity threshold analisys for DDA high impedance fault detection algorithm

Research paper thumbnail of Object Oriented Architecture of a Load Composition Identification System at Distribution Level

A proper load representation is necessary in order to obtain the maximum benefits from a power fl... more A proper load representation is necessary in order to obtain the maximum benefits from a power flow or a dynamic performance analysis. The actual behaviour of the load depends on the load composition, which varies from bus to bus of the system, time, weather etc. Therefore to en- hance the load model representation at a point in the system it

Research paper thumbnail of Efecto del arco en fusibles limitadores y de corte integral: comparación de resultados y análisis

Research paper thumbnail of Fuzzy multicriteria decision making applied to the strategic plan of Valencia

Research paper thumbnail of Last Planner Control System Applied to a Chemical Plant Construction

Journal of Construction Engineering and Management, 2012

Research paper thumbnail of DSTRP: A new algorithm for high impedance fault detection in compensated neutral grounded M.V. power systems

European Transactions on Electrical Power, 2003

The detection algorithms depend on the network topology, the neutral grounding of the secondary w... more The detection algorithms depend on the network topology, the neutral grounding of the secondary winding in H. V./M V. transformers being one of the main factors to consider. In compensated distribution systems, we need complex detection algorithms based on network parameters estimation. The neutral voltage is the most sensitive magnitude to detect an unusual situation but it is not a selective parameter. In this paper we present the new DSTRP that calculates the influence of each feeder asymmetry in neutral voltage. We also analyze the measurement errors influence that limits the sensitivity threshold of this algorithm.

Research paper thumbnail of A fuzzy multi-criteria decision-making model for construction contractor prequalification

Automation in Construction, 2012

Selecting an appropriate contractor is essential for the success of any construction project. Con... more Selecting an appropriate contractor is essential for the success of any construction project. Contractor prequalification procedure makes it possible to admit for tendering only competent contractor. Prequalification is a multi-criteria decision problem that is, in essence, largely dependent on the uncertainty and vagueness in the nature of construction projects and subjective judgement of the decision-maker. This paper presents a systematic prequalification procedure, based on Fuzzy Set Theory, whose main differences and advantages in comparison with other models are the use of an algorithm to handle the inconsistencies in the fuzzy preference relation when pair-wise comparison judgements are used and the use of linguistic assessment or exact assessment of performance of the contractors on qualitative or quantitative criterion, respectively. Finally, a case study for the rehabilitation project of a building at Technical University of Cartagena is presented to illustrate the use of the proposed model and to demonstrate its effectiveness.

Research paper thumbnail of Real time test benchmark design for photovoltaic grid-connected control systems

Electric Power Systems Research, 2011

This paper presents a dual digital signal processor (DSP) hardware architecture for a grid-connec... more This paper presents a dual digital signal processor (DSP) hardware architecture for a grid-connected photovoltaic interface test benchmark, based on a cascade DC/DC converter and DC/AC inverter, with coordinated control algorithms. The control hardware has been designed to test distributed generation (DG) interfaces to be integrated in a hierarchical structure of computational agents, to apply distributed control techniques to the power system management. The proposed dual DSP architecture enables the programming of the control software for the DC/DC converter and the DC/AC inverter in the same processor, to keep the other one for additional operations that are required when there is a high degree of interaction between the DG 2 unit and the rest of the electrical grid components. The hardware architecture has been tested in several real situations such as power factor correction and anti-islanding protection.

Research paper thumbnail of Results using Different Reactive Power Definitions for Wind Turbines Submitted to Voltage Dips: Application to the Spanish Grid Code

2006 IEEE PES Power Systems Conference and Exposition, 2006

Abstract—This article adds the Spanish grid code to the previously published works about the comp... more Abstract—This article adds the Spanish grid code to the previously published works about the comparison of international regulations for connection of wind turbines to the network. Specifically, is focused on the reactive power generated by wind turbines when they are ...

Research paper thumbnail of Results using different reactive power definitions for wind turbines submitted to voltage dips: Application to the spanish grid code

… , 2006. PSCE'06. …, 2006

Abstract—This article adds the Spanish grid code to the previously published works about the comp... more Abstract—This article adds the Spanish grid code to the previously published works about the comparison of international regulations for connection of wind turbines to the network. Specifically, is focused on the reactive power generated by wind turbines when they are ...

Research paper thumbnail of DSTRP A new algorithm for high impedance fault detection

The detection algorithms depend on the network topology, the neutral grounding of the secondary w... more The detection algorithms depend on the network topology, the neutral grounding of the secondary winding in H.V./M.V. transformers being one of the main factors to consider. In compensated distribution systems, we need complex detection algorithms based in network parameters estimation.

Research paper thumbnail of Last planner control system applied to a chemical plant construction

The main difference between the Last Planner production control system developed by Ballard and c... more The main difference between the Last Planner production control system developed by Ballard and classical control systems is the way in which projects are controlled and planned. The Last Planner system focuses on controlling production units, workflows and the quality of the performed work. It also permits the identification of the causes for the non-completion of planned work and decision making in accordance with the project requirements so that actions are timely and productivity is increased.

Research paper thumbnail of A fuzzy multi-criteria decision making model for construction contractor prequalification

Selecting an appropriate contractor is essential for the success of any construction project. Con... more Selecting an appropriate contractor is essential for the success of any construction project. Contractor prequalification procedure makes it possible to admit for tendering only competent contractor. Prequalification is a multi-criteria decision problem that is, in essence, largely dependent on the uncertainty and vagueness in the nature of construction projects and subjective judgement of the decision-maker. This paper presents a systematic prequalification procedure, based on Fuzzy Set Theory, whose main differences and advantages in comparison with other models are the use of an algorithm to handle the inconsistencies in the fuzzy preference relation when pair-wise comparison judgements are used and the use of linguistic assessment or exact assessment of performance of the contractors on qualitative or quantitative criterion, respectively. Finally, a case study for the rehabilitation project of a building at Technical University of Cartagena is presented to illustrate the use of the proposed model and to demonstrate its effectiveness.