No abstract

⎯ The use of frequency converters in induction motor drive centrifugal pumps allows controlling the flow discharge systems provided by pumping through the rotation of the pump. The method of controlling the flow through the pump rotation, in terms of energy efficiency is much more effective in the reduction of electric power consumption and active power demand of the control method done by adjusting the valve opening or register. However, the use of the frequency converter generates harmonic current, which may distort the sine waveform of the supply voltage of electricity supply. In this context, this article aims at showing advantages in reducing the flow in pumping systems with the use of frequency converters, but mainly to show that it is necessary to pay special attention to the harmonics generated with the use of this equipment.

Agradeço a Deus pelas conquistas e também pelas dificuldades que surgem como forma de aprendizado em nossas vidas. Agradeço aos meus pais, Luiz Artur e Suely, por sempre motivarem a busca por novas experiências e proporcionarem uma formação de qualidade, ajudando-me de todas as formas possíveis, tanto financeiramente quanto emocionalmente. Também agradeço a toda a minha família, em especial a minha irmã Ana Luiza. Ao meu namorado Fabricio Mourinho, por todo o apoio e carinho durante esses dois anos de mestrado. Ao meu orientador, Prof. Dr. Ricardo Quadros Machado pela orientação, paciência e amizade que foram fundamentais para execução deste trabalho. Agradeço a todos os amigos que fiz em São Carlos, especialmente a Camila Fantin, Aline Nonato e Camila Vieira pelos conselhos, amizade e momentos especiais compartilhados. A Luana Locatelli, pelo apoio incondicional, amizade verdadeira e palavras de otimismo. Agradeço aos amigos e colegas do Laboratório de Fontes Alternativas e Processamento de Energia pela parceria cotidiana. Em especial ao Cassius Rossi e Klebber Ottoboni pelas contribuições ao meu trabalho e pelo apoio. A todos os meus professores da Universidade Federal de Mato Grosso e da Universidade de São Paulo que contribuíram de forma direta e indireta com o meu trabalho e com a minha formação profissional. Em particular, gostaria de agradecer ao Prof. Arnulfo Barroso de Vasconcellos e a Prof. Teresa Irene Ribeiro de Carvalho Malheiro pelo incentivo a pesquisa e pela amizade. Aos membros da banca examinadora, Prof. Dr. Marcelo Gradella Villalva e Prof. Dr. Ernane Antônio Alves Coelho por aceitarem o convite de avaliar e contribuir com o trabalho de modo a enriquecê-lo.

Abstract.Currently existing mobile substations in the market are characterized by a unique set involving protection, switches, transformer and others. This set has considerable weight and size, making it difficult to trafficability and mobility, due to limitations imposed by DNIT, besides the size and characteristics of the road network in the state of Mato Grosso. This article discusses a concept of fragmented mobile substation modules. This new proposal will provide a faster service by avoiding monetary penalties by indicators of continuity, and diversity into emergency care, as well as in meeting seasonal peak demands of certain regions of the Mato Grosso due to the characteristics of industries that comprise the agribusiness. This article addresses some additional advantages in the use of vegetable oils as compared to mineral oil. The use of vegetable oil as well as presenting technical advantages reduces possible harm to the environment during the displacement of the mobile substation.

Abstract.Currently existing mobile substations in the market are characterized by a unique set involving protection, switches, transformer and others. This set has considerable weight and size, making it difficult to trafficability and mobility, due to limitations imposed by DNIT, besides the size and characteristics of the road network in the state of Mato Grosso. This article discusses a concept of fragmented mobile substation modules. This new proposal will provide a faster service by avoiding monetary penalties by indicators of continuity, and diversity into emergency care, as well as in meeting seasonal peak demands of certain regions of the Mato Grosso due to the characteristics of industries that comprise the agribusiness. This article addresses some additional advantages in the use of vegetable oils as compared to mineral oil. The use of vegetable oil as well as presenting technical advantages reduces possible harm to the environment during the displacement of the mobile substation.