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Publications

Publications by CPES

2008

529: Failed Back Surgery Syndrome

Authors
FERREIRA, M; REBELO, H; GOMES, D; ARANTES, S; PEREIRA, J; MARCOS, A;

Publication
Regional Anesthesia and Pain Medicine

Abstract

2008

Fault Detection on Wind Generators

Authors
Brandao, RM; Carvalho, JB; Barbosa, FM;

Publication
2008 PROCEEDINGS OF THE 43RD INTERNATIONAL UNIVERSITIES POWER ENGINEERING CONFERENCE, VOLS 1-3

Abstract
All over the world, energy companies are investing in technologies to make better use of renewable energy to generate electric power. Wind energy is the renewable energy source that had a higher growing in the last decades and can be considered a hope in future based on dean and sustainable energy. The development of tools that allows operators and maintenance personnel to correlate machinery related information with other operational information such as machine speed, electrical load, and wind speed, are needed.

2008

Electrical power system security analysis using problem-based learning

Authors
Travassos Valdez, MM; Faustino Agreira, CI; Machado Ferreira, C; Maciel Barbosa, FP;

Publication
Proceedings of the Universities Power Engineering Conference

Abstract
In a competitive world such as ours, students must be prepared beforehand to be autonomous, industrious and skilful. Problem-based learning (PBL) is a methodology that can help the students to explore and put to use their own resources, and it can be applied to a wide range of students and subject matters. The project incorporates aspects of electrical engineering and computing skills. This study is dedicated to the learning process to help students to deal with the complexity of an electric power network. This study has conducted a new methodology in educational research by adopting technology for teaching and learning. PBL, as an instructional strategy of active learning, was used and adapted for use in Analysis in Electrical Power Systems programme. This methodology addresses many of the concerns of teachers and professional organizations. Above all, it encourages students to be in charge of their education. It emphasizes critical thinking skills, understanding, learning how to learn, and working cooperatively with others. The benefits of PBL in the Electrical Power Systems course are seen in the way students improved the study and analysis of the security in an electrical power system. This method can also be seen as a benefit for Electric Power Systems where educators strive for improved teaching and learning.

2008

Accreditation processes in Electronic and Information Engineering

Authors
Barbosa, FM; Burkley, C; Hoffmann, M; Pasquet, D;

Publication
Proceedings of 36th European Society for Engineering Education, SEFI Conference on Quality Assessment, Employability and Innovation

Abstract
The aim of the SOCRATES EIE-Surveyor project is to be a reference point for Electrical and Information Engineering in Europe. The project brings together representatives from 27 out of 31 eligible countries. One of the tasks of the project is the evaluation of the accreditation processes in the participating countries. A questionnaire about the accreditation process was developed and sent to project partners in each participating country. The main areas investigated the nature of the accreditation body, the criteria, which are evaluated, the structure of the visit and the decision formulation. A first analysis shows that some countries have not yet introduced a formal accreditation process. These countries are generally in a transition situation in relation to introducing the Bologna process. In some other countries several accreditation bodies exist depending on the region or the nature of the institution. It also appears that the accreditation for masters degrees is not yet compulsory everywhere. Other issues regarding the accreditation process that are also being considered relate to who pays the expenses in relation to the accreditation process, what is the relationship between the ECTS and the actual content and level of the courses and whether or not industrial placement is a compulsory component of the programme.

2008

Clustering analysis on questionnaire data for program accreditation

Authors
Papadourakis, G; Barbosa, FM; Burkley, C; Hoffmann, M; Pasquet, D; Tsiriotis, G; Kiriakides, I;

Publication
19th EAEEIE (European Association for Education in Electrical and Information Engineering) Annual Conference - Formal Proceedings

Abstract
The aim of the SOCRATES EIE-Surveyor project is to be a reference point for Electrical and Information Engineering in Europe, bringing together representatives from 27 out of 31 eligible countries. One of the tasks of the project is the evaluation of the accreditation processes in the participating countries. A questionnaire about the accreditation process was developed and sent to project partners in each participating country. The main areas investigated the nature of the accreditation body, the criteria, which are evaluated, the structure of the visit and the decision formulation. The results of the questionnaire, will be analyzed using clustering analysis and more precisely hierarchical, in order to compare the answers in 17 European countries and to find similarities among them. As distance measures the Euclidian metric and the City block distance will be used. Average linkage, and Ward clustering algorithms will be utilized. © 2008 IEEE.

2008

Dynamic Voltage Stability Assessment of an Electric Power Network using Composite Load Models

Authors
Pereira, RMM; Pereira, AJC; Ferreira, CMM; Barbosa, FPM;

Publication
Proceedings of the Universities Power Engineering Conference

Abstract
Electric power network stability analysis requires that all system components are represented by their models. Usually, detailed data about system components such as generators, transformers and transmission lines are available. In this case accurate models can be derived from the network devices. However, corresponding data for individual loads are not always available, which makes the modelling of loads an important area of research studies. In this paper it is studied and analysed the effect of the composite load models in the dynamic voltage stability of an electric power network. The composite load models comprise residential, commercial and industrial loads. A severe contingency situation was simulated. The automatic voltage regulators of the generating units, the turbine speed governors, and the under load tap changers models were taken into account. The simulation results were obtained using the EUROSTAG software package. Finally, some conclusions that provide a better understanding of the dynamic voltage stability are pointed out.

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