Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-27T00:23:27Z No. of bitstreams: 1 CalistoRochaDeOliveiraNeto_DISSERT.pdf: 1762890 bytes, checksum: 93ae8e397990262e290933fbf4fa5c1a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-09-02T00:02:13Z (GMT) No. of bitstreams: 1 CalistoRochaDeOliveiraNeto_DISSERT.pdf: 1762890 bytes, checksum: 93ae8e397990262e290933fbf4fa5c1a (MD5) / Made available in DSpace on 2016-09-02T00:02:13Z (GMT). No. of bitstreams: 1 CalistoRochaDeOliveiraNeto_DISSERT.pdf: 1762890 bytes, checksum: 93ae8e397990262e290933fbf4fa5c1a (MD5) Previous issue date: 2016-03-04 / Esta disserta??o objetiva analisar o setor e?lico no estado do Rio Grande do Norte destacando os principais desafios ao seu desenvolvimento. A quest?o central de pesquisa ? saber qual o lugar do Nordeste e do Rio Grande do Norte no mapa da ?expans?o e diversifica??o? do setor el?trico brasileiro e quais s?o os seus principais desafios e oportunidades. A hip?tese de pesquisa ? que a energia e?lica ? um dos vetores de desenvolvimento do Nordeste. Todavia, a despeito de expans?o recente deste setor, acredita-se que o rebatimento desta atividade sobre o desenvolvimento regional pode ser ampliado a partir da internaliza??o, tanto quanto poss?vel, da cadeia produtiva da energia e?lica tamb?m na regi?o. Isto pressup?e pol?ticas de incentivo ao enfrentamento dos gargalos produtivos, log?sticos, de CT&I e de qualifica??o profissional. Todavia, tais pol?ticas ainda se mostram insuficientes na regi?o, especialmente no Rio Grande do Norte. A metodologia aplicada contempla uma pesquisa secund?ria e de campo. A revis?o bibliogr?fica explora a constru??o do Setor El?trico Brasileiro (SEB), enfatizando o papel do Estado no planejamento e constru??o do setor, as circunst?ncias que resultaram na privatiza??o de parte das empresas p?blicas do setor el?trico nos anos 1990 e sua retomada no planejamento do SEB, promovendo a diversifica??o do sistema e a inser??o de novas fontes renov?veis de energia, com destaque para a energia e?lica. A revis?o de literatura tamb?m situa a energia e?lica no mundo, Brasil e Nordeste, destacando o seu potencial em rela??o ?s demais fontes, bem como a sua import?ncia para o desenvolvimento sustent?vel. Ainda s?o sistematizados e analisados dados sobre a origem, perfil, aspectos econ?micos e tecnol?gicos do setor e?lico no Rio Grande do Norte, bem como dos territ?rios que abrigam parques e?licos. O estudo tamb?m cont?m uma pesquisa de campo realizada junto a importantes atores envolvidos com a atividade no estado. Os resultados confirmam a hip?tese e apontam que a energia e?lica ? um dos vetores de desenvolvimento para o Rio Grande do Norte, que o estado tem recebido grandes investimentos na implementa??o de parques e?licos e ? destaque em produ??o de energia. Entretanto, esse sucesso na produ??o n?o se reflete na atra??o de fabricantes da cadeia produtiva do setor. Problemas log?sticos e infraestruturais, dentre outros, tamb?m s?o real?ados pelos atores entrevistados. Todos estes aspectos, embora impliquem num cen?rio incerto quanto aos rebatimentos desta atividade no desenvolvimento local/regional, tamb?m se constituem em oportunidades de a??es e pol?ticas. / This study aims to analyze the wind sector in Rio Grande do Norte state highlighting the main challenges to its development. The central research question is to know what is the place in the Northeast and Rio Grande do Norte on the map of 'expansion and diversification' of the Brazilian electric sector and what are its main challenges and opportunities. The research hypothesis is that wind power is one of the Northeast's development vectors. However, despite the recent expansion of this sector, it is believed that the folding of this activity on regional development can be extended from the internalization as much as possible, the wind energy supply chain also in the region. This assumes incentive policies to confront the production bottlenecks, logistics, CT&I and professional qualification. However, such policies still are insufficient in the region, especially in Rio Grande do Norte. The applied methodology includes a secondary and field research. The literature review explores the construction of the Brazilian Electric Sector (SEB), emphasizing the state's role in the planning and construction sector, the circumstances that resulted in the privatization of the public companies in the electricity sector in the 1990s and their resumption in the planning of SEB by promoting the diversification of the system and the inclusion of new renewable energy sources, especially wind power. The literature review also located wind power in the world, Brazil and Northeast, highlighting its potential in relation to other sources, as well as its importance for sustainable development. They are still organized and analyzed data on the origin, profile, economic and technological aspects of the wind sector in Rio Grande do Norte, as well as the territories that are home to wind farms. The study also contains a field survey of important actors involved in the activity in the state. The results confirm the hypothesis and show that wind energy is one of the development vectors for the Rio Grande do Norte, the state has received large investments in the implementation of wind farms and is featured in energy production. However, this success in production is not reflected in attracting manufacturers of the production chain. Logistical and infrastructural problems, among others, are also performed by actors interviewed. All these aspects, although involving an uncertain scenario regarding the repercussions of this activity in local / regional development, also constitute opportunities actions and policies.

Made available in DSpace on 2016-04-28T20:19:20Z (GMT). No. of bitstreams: 1 2007 - Deividy Attila Marcelino.pdf: 602923 bytes, checksum: b30a778e1a49c1c66c059e268603c8de (MD5) Previous issue date: 2007-03-19 / The objective of this study is to draw a panorama of the business strategies in the segment of electric power generation, making a comparison among the data obtained in the research, starting from 2001. The analysis is based on the vertical integration level, in the participation area in the country and in the technology (hydroelectric power, thermoelectric or alternative) used by the companies. Those variables are compared to the ROE of each company and to the composition of its Social Capital. For that, the sample contains three private companies, three public state companies and three public federal companies, so that it establishes a balance in the analysis. The methodology consists of a multicases study with the survey of data by formularies. The obtained results demonstrate that the best performance don't depend on the composition of the company?s Social Capital, but depends on its strategic vision. In other words, the companies that adapt to the market, taking advantage new opportunities, have the largest Return on Equity. That verification reinforces the Theories of Innovation of Value of Kim & Maubourgne, where the companies break up with the effective order and create new market borders. / O objetivo deste estudo ? tra?ar um panorama das estrat?gias empresariais do segmento de gera??o de energia el?trica, fazendo uma compara??o entre os dados obtidos na pesquisa, a partir de 2001. A an?lise ? baseada no n?vel de verticaliza??o, na regi?o de atua??o no pa?s e na tecnologia (hidrel?trica, termel?trica ou alternativa) utilizada pelas empresas. Essas vari?veis s?o comparadas ao ROE de cada empresa e paralelamente ? composi??o do seu capital. Para isso, a amostra possui tr?s empresas privadas, tr?s p?blicas estaduais e tr?s p?blicas federais, de forma que se mantenha um equil?brio na an?lise. A metodologia consiste em um estudo de multicasos com o levantamento de dados atrav?s de formul?rios. Os resultados obtidos demonstram que os melhores desempenhos n?o dependem da composi??o do capital da empresa, mas sim, de sua vis?o estrat?gica. Ou seja, as empresas que buscam se adaptar, aproveitando as novas oportunidades do mercado, t?m os maiores retornos sobre o Patrim?nio Liquido. Tal constata??o refor?a as Teorias de Inova??o de Valor de Kim & Maubourgne, onde as empresas rompem com a ordem vigente e criam novas fronteiras de mercado.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-03T20:52:32Z No. of bitstreams: 1 AdrianaCavalcanteMarques_DISSERT.pdf: 6652160 bytes, checksum: f4c1dfa84af7460823c1ea1643624042 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-04-06T21:19:34Z (GMT) No. of bitstreams: 1 AdrianaCavalcanteMarques_DISSERT.pdf: 6652160 bytes, checksum: f4c1dfa84af7460823c1ea1643624042 (MD5) / Made available in DSpace on 2017-04-06T21:19:34Z (GMT). No. of bitstreams: 1 AdrianaCavalcanteMarques_DISSERT.pdf: 6652160 bytes, checksum: f4c1dfa84af7460823c1ea1643624042 (MD5) Previous issue date: 2016-06-27 / O setor el?trico brasileiro tem apresentado diferentes mudan?as, desde a desverticaliza??o das empresas at? a cria??o do ?rg?o regulador (Aneel - Ag?ncia Nacional de Energia El?trica) respons?vel pela regula??o econ?mica dos segmentos de transmiss?o e distribui??o. Contudo, a Aneel aplica as pol?ticas de tarifa??o separadamente entre os segmentos que comp?em o sistema el?trico, n?o considerando as rela??es existentes na cadeia de suprimentos. O presente trabalho tem como objetivo propor um novo modelo de an?lise de efici?ncia do sistema el?trico brasileiro a fim de tornar a revis?o tarif?ria melhor ajustada para a realidade do cen?rio atual. Os segmentos do setor (gera??o, transmiss?o e distribui??o) foram fundamentados por meio de um conjunto de vari?veis recorrentes na literatura para retratar os processos realizados no sistema el?trico, no ?mbito nacional e internacional. A partir disso, o modelo conceitual considera 12 vari?veis distribu?das em tr?s dimens?es: custo, produtividade e qualidade. A amostra contempla 94 empresas, dentre as quais segmentam: 16 empresas de gera??o, 28 empresas transmissoras de energia e 50 empresas distribuidoras. As Unidades Tomadoras de Decis?o (Decision Making Units - DMU) foram classificadas como os caminhos com as diferentes empresas da gera??o at? a distribui??o de energia, de forma que a amostra totalizou em 362 DMUs. Na condu??o da pesquisa, elaborou-se um modelo para avalia??o do sistema el?trico com a utiliza??o da An?lise Envolt?ria de Dados (DEA ? Data Envelopment Analysis), com o prop?sito de identificar quantitativamente o n?vel de efici?ncia da rede. De modo a poder representar a complexidade do sistema el?trico, o modelo proposto utiliza o DEA em redes (Network Data Envelopment Analysis ? NDEA) com tr?s est?gios, cada um simulando os segmentos do setor, para identificar os impactos entre os processos e as causas de inefici?ncia. Esses est?gios da rede foram avaliados para verificar a performance das empresas em cada segmento e validar o modelo de retornos constantes de escala, por meio dos modelos cl?ssicos CCR em compara??o com o NDRS, utilizado pela Aneel. A partir dessa compara??o entre os modelos cl?ssicos, validou-se o uso do modelo de retornos constantes de escala para as an?lises do setor. Os resultados do modelo NDEA apontam para a adequa??o do m?todo proposto realizando a an?lise agregada do sistema el?trico, ao apresentar resultados mais discriminat?rios que os modelos cl?ssicos. Obteve-se que nenhum caminho da rede observado possui as tr?s empresas constituintes eficientes em sua totalidade. Contudo, foi poss?vel identificar em quais liga??es as empresas devem focar seus investimentos para alcan?ar melhores desempenhos e quais redes ter como benchmarks, contribuindo para a tomada de decis?o gerencial e o planejamento eficiente das empresas. Por fim, identificou-se os fatores ex?genos que influenciam na efici?ncia, como a regi?o geogr?fica e porte, sendo poss?vel ent?o, obter diagn?sticos para uma tarifa??o mais adequada ? realidade do setor, beneficiando tanto os consumidores, quanto as empresas e o governo. / The Brazilian electricity sector has shown different changes, since unbundling of companies to the creation of the regulatory agency (Aneel - National Electric Energy Agency), responsible for the economic regulation of the transmission and distribution segments. However, Aneel applies charging policies separately between the segments that make up the electrical system, not considering the relationship in the supply chain. In this context, this paper aims to propose a new model of the Brazilian electric system efficiency analysis in order to make the best-adjusted tariff review with the system reality. The segments of the industry (generation, transmission and distribution) were founded through a set of recurring variables in the literature to portray the processes carried out in the electrical system at the national and international levels. The conceptual model includes initially 12 variables divided into three dimensions: cost, productivity and quality. The sample includes 94 companies, consisting of in 16 generation companies, 28 electricity transmission companies and 50 distribution companies. The Decision Making Units (DMU) were considered the paths from generation to distribution, so that the sample contains 362 DMUs in total. In conducting the research analysis, a model was developed to evaluate the electrical system using the data envelopment analysis (DEA) to quantitatively identify the network efficiency level. To be able to represent the complexity of the electrical system, a unique grouping model was proposed and analyzed by Network DEA's model (NDEA) in three stages, each one simulating a particular segment of the industry, in order to identify the impacts between the processes and the causes of inefficiency. These stages of the network were evaluated to verify the performance of the companies in each segment and validate the model of constant returns to scale, through the classic models CCR compared to the NDRS used by Aneel. From this comparison between the classic models, the use of constant returns to scale model for sector analysis was validated. The results of the NDEA model point to the adequacy of the proposed method by performing the electrical system aggregate analysis, by presenting more discriminatory results than classic models. Furthermore, none of the paths have efficient companies in all of its three stages. However, it was possible to identify which links those companies should focus their investments to achieve better performance and which networks are its benchmarks, contributing to the decision-making and the efficient planning of companies. Finally, we identified the exogenous factors that influence efficiency, such as geography and size, thereby making possible to obtain a more appropriate tariffing regarding the reality of the sector, benefiting consumers, companies and the government.

Made available in DSpace on 2014-12-17T15:53:15Z (GMT). No. of bitstreams: 1 RidalvoMAO.pdf: 983858 bytes, checksum: 9d7af440fc2e650709bb958e39fbb63a (MD5) Previous issue date: 2003-10-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This work verifies the impact caused by the Emergencial Program of Reduction of Consumption of Electric Energy (energy-rationing program) in the results of the concessionary private companies of the public service of electric energy distribution localized in the Northeast Area. As the rationing invigorated from June 2001 to February 2002, its effects are diluted in the results presented by these companies in the second semester of 2001 and first quarter of 2002, with prominence for the last quarter of 2001, when the revenue of extraordinary tariff restore was instituted by the National Agency of Electric Energy (ANEEL), consequence of the so-called General Agreement of the Electric Sector made between the federal government and the companies of the electric sector. The structure of a generic electric sector and a historical review of the Brazilian electric sector from the time it was controlled by the private enterprises, including the State control period, about 1960, and returning to the control of the private enterprises in 1990, under a new regulation structure are presented. An explanation of the models of economic regulation that Brazil used for the electric sector is made, with prominence for the price cap that is the actual effective model. The process of tariff revision foreseen in the concession contracts signed by the federal government and the concessionary companies is presented, highlighting its two stages: the tariff rebalancing that defines the new price cap and the calculation of the factor X that establishes the efficiency goals for the companies. There is made a presentation of the Emergencial Program of Reduction of Consumption of Electric Energy and of the consequent General Agreement of the Electric Sector, which created the revenue of extraordinary tariff restore. A conceptual revision on reviews is presented, regarding to concepts, accomplishment and recognition. A brief review of the six companies that made part of the worked sample is also presented. Analyzing the quarters historical review and of amount of sold energy, it was possible to conclude that the energy-rationing altered the results of the studied companies significantly and that alteration was masked by the accounting process of the revenue of extraordinary tariff restore / Este trabalho verifica o impacto provocado pelo Programa Emergencial de Redu??o de Consumo de Energia El?trica (racionamento) nos resultados das empresas privadas concession?rias do servi?o p?blico de distribui??o de energia el?trica situadas na Regi?o Nordeste. Como o racionamento vigorou de junho de 2001 a fevereiro de 2002, os seus efeitos est?o dilu?dos nos resultados apresentados pelas empresas no segundo semestre de 2001 e primeiro trimestre de 2002, com destaque para o ?ltimo trimestre de 2001, quando foi institu?da pela Ag?ncia Nacional de Energia El?trica (ANEEL) a receita de recomposi??o tarif?ria extraordin?ria, fruto do chamado Acordo Geral do Setor El?trico pactuado entre o governo federal e as empresas do setor el?trico. Apresenta a estrutura de um setor el?trico gen?rico e uma revis?o hist?rica do setor el?trico brasileiro abrangendo desde a ?poca em que era controlado por empresas privadas, passando pelo per?odo de estatiza??o, por volta de 1960, e retornando ao controle da iniciativa privada em meados de 1990, sob uma nova estrutura de regula??o. ? feita uma explana??o sobre os modelos de regula??o econ?mica que o Brasil utilizou para o setor el?trico, com destaque para o price cap, que ? o modelo vigente atualmente. Apresenta o processo de revis?o tarif?ria prevista nos contratos de concess?o assinados pelo governo federal e pelas empresas concession?rias, destacando suas duas etapas: o reposicionamento tarif?rio, que define o novo pre?o-teto, e o c?lculo do fator X , que estabelece as metas de efici?ncia para as empresas. ? feita uma apresenta??o do Programa Emergencial de Redu??o de Consumo de Energia El?trica e do conseq?ente Acordo Geral do Setor El?trico, que deu origem ? receita de recomposi??o tarif?ria extraordin?ria. Apresenta uma revis?o conceitual sobre receitas, no que tange a conceitos, realiza??o e reconhecimento. Apresenta um breve hist?rico das seis empresas que fizeram parte da amostra trabalhada. Analisando os hist?ricos trimestrais de receita e de volume de energia vendida, foi poss?vel concluir que o racionamento de energia alterou significativamente os resultados das empresas estudadas e que essa altera??o foi mascarada pela medida cont?bil da receita de recomposi??o tarif?ria extraordin?ria