Distribution feeders form the last leg of the bulk power system and have the responsibility of providing reliable power to the customers. These feeders experience voltage drops due to a combination of feeder length, load distribution, and other factors. Traditionally, voltage drop was a major concern. Now, due to an ever-increasing PV penetration, overvoltage has also become a major concern. This limits the amount of solar PV that may be integrated. Few solutions exist to improve the voltage profile, where the most common is the use of voltage control devices like shunt capacitors and voltage regulators. Due to a large number of design parameters to be considered, the determination of the numbers and locations of these devices is a challenging problem. Significant research has been done to address this problem, utilizing a wide array of optimization techniques. However, many utilities still determine these locations and numbers manually. This is because most algorithms have not been adequately validated. The validation of a voltage profile design (VPD) algorithm has been presented here. The validation of this algorithm was carried out on a set of statistically relevant feeders. These feeders were chosen based on the results obtained from a feeder taxonomy study using clustering analysis. The algorithm was found to be effective in enhancing the amount of solar PV a feeder may host, while still maintaining all the voltages within the ANSI standard limits. Furthermore, the methodology adopted here may also be used for the validation of other algorithms. / Master of Science / Utilities have the responsibility of providing reliable power supply to their customers. Traditionally, bulk power was generated and transmitted over long distances incurring losses and voltage drops along the way. Now, with the integration of distributed energy resources, particularly solar photovoltaic (PV) generators at the customer locations, overvoltage has also become a problem. This requires adoption of measures which can help in maintaining the voltages within standard limits. Several options exist to compensate for these voltage issues, the most commonly used is voltage control devices like capacitor banks and voltage regulators. However, determining the required numbers of these devices and their appropriate locations is a challenging problem. Even though a number of algorithms have been proposed to give automated solutions to this problem, most utilities still use a manual approach. This is because these algorithms have not been validated on a statistically relevant set of feeders. To solve this issue, the validation of a voltage profile design (VPD) algorithm is presented in this thesis. The ability of this algorithm to enhance the amount of PV that may be connected to a distribution network has been validated on a set of feeders. The feeders were chosen based on the results obtained from clustering analysis, a machine learning concept. The cost effectiveness of this algorithm has also been investigated and significant savings were observed. Furthermore, the methodology adopted here can be easily extended for the validation of other algorithms as well.

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-06-10T17:50:01Z No. of bitstreams: 1 LAÍLA ALVES MARINHO DANTAS - DISSERTAÇÃO PPGDesign 2016..pdf: 7152334 bytes, checksum: a02330b68b291df42f791e0d0a62313a (MD5) / Made available in DSpace on 2018-06-10T17:50:01Z (GMT). No. of bitstreams: 1 LAÍLA ALVES MARINHO DANTAS - DISSERTAÇÃO PPGDesign 2016..pdf: 7152334 bytes, checksum: a02330b68b291df42f791e0d0a62313a (MD5) Previous issue date: 2016 / A pesquisa procurou identificar o perfil profissional dos egressos do curso de Design da Universidade Federal de Campina Grande, que se formaram entre os anos de 2005 a 2014, submetidos ao Projeto Político Pedagógico implantado no ano de 2001. Além disso, buscou analisar a percepção destes sobre a formação recebida. O estudo possuiu enfoque misto e caracterizou-se como Exploratório Sequencial de caráter comparativo, o qual constituiu-se de uma primeira fase de pesquisa qualitativa sobre temas importantes para o estudo, permitindo a construção de uma base de dados para a elaboração do instrumento de pesquisa da segunda fase. Esta, por sua vez, caracterizou-se como uma survey, na qual foram coletados dados quantitativos por meio de um questionário autoadministrado à amostra via internet, resultando em uma taxa de respondentes de 72%. Dentre as principais inferências, destaca-se a identificação de um maior número de atividades exercidas em atividades não ligadas à área de formação, como o design gráfico e o design de interiores, em detrimento daquelas ligadas à área do design de produto. Observou-se que existe uma incompatibilidade entre algumas das áreas abordadas no curso e as principais áreas exercidas pelos egressos, ou seja, uma incompatibilidade entre a vocação do curso e a vocação produtiva local, visto que a grande maioria dos egressos exerceu suas atividades profissionais na Paraíba. Identificaram-se ainda as práticas pedagógicas dos docentes, a pouca aplicação dos projetos à realidade regional, a pouca interação com o mercado de trabalho e a pouca interdisciplinaridade no curso como alguns de seus principais pontos fracos. Contudo, de forma geral, os egressos acreditam que a graduação foi satisfatória para o exercício de suas atividades profissionais. / This research aimed to identify the professional profile of Design graduates at Federal University of Campina Grande, who earned their degrees between 2005 and 2014, under the pedagogic political project inaugurated in 2001. Moreover, it sought to analyze the perception of those graduates on the education received. Accordingly, this sequential exploratory study under a comparative perspective adopted a mixed focus and was accomplished in two phases. The first one consisted of a qualitative research on relevant issues to the study, which allowed the construction of a database for the development of the research instrument to the following phase. The second one utilized a survey to collect quantitative data using a self-administered questionnaire via the Internet, resulting in a respondent rate of 72%. Among the leading conclusions, it is stressed the identification of a greater number of activities carried out in jobs not connected to their former area of education, such as graphic design and interior design. Inaddition, there is an incompatibility between some of the areas covered in the course and the main areas performed by the graduates, unveiling a mismatch between the vocation of the course and the local productive vocation, as the vast majority of graduates worked in Paraíba. Finally, this research also brought to light the pedagogical practice of teachers, the poor application of projects to the regional reality, the little interaction with the job market and thelittle interdisciplinarity in the course as some of its major weaknesses. Nonetheless, graduates believe that, in general, their course was satisfactory to their professional practice.

Arbetet dimensionerar ett panelsystem för att motstå yttre påfrestningar som snö och vind, samtidigt som att det ska erbjuda oförstörande av- och påmontering. Hållfasthetsberäkningar har utförts med hjälp av statiska balkfall. Dimensionering av spår, snäppfunktion och låsningar i profilsystemet har utförts. Konstruktionsritningar har utförts, baserade på dimensionering och standarder. Med hjälp av detta arbete går det att tillverka detta system, åtminstone i ett prototypstadie. / This work dimensions a panel system to withstand external loads such as snow and wind, while it will offer non-destructive removing and assembly. Strength calculations have been performed using static beam cases. The design of the track, the snap-fit assembly and locks in the profile system has been changed. Construction drawings have been made, based on the calculated dimensions and required ISO-standards. With the existing work, it is possible to manufacture this system, at least in a prototype stage.