Reconfiguração de sistemas de distribuição utilizando metaheurísticas e critérios de confiabilidade

In an ever more competitive environment, power distribution companies must satisfy two conflicting objectives: minimizing investment costs and the satisfaction of reliability targets. The network reconfiguration of a distribution system is a technique that well adapts to this new deregulated environment for it allows improvement of reliability indices only opening and closing switches, without the onus involved in acquiring new equipment. Due to combinatorial explosion problem characteristic, in the solution are employed metaheuristics methods, which converge to optimal or quasi-optimal solutions, but with a high computational effort. As the main objective of this work is to find the best configuration(s) of the distribution system with the best levels of reliability, the objective function used in the metaheuristics is to minimize the LOLC - Loss Of Load Cost, which is associated with both, number and duration of electric power interruptions. Several metaheuristics techniques are tested, and the tabu search has proven to be most appropriate to solve the proposed problem. To characterize computationally the problem of the switches reconfiguring was developed a vector model (with integers) of the representation of the switches, where each normally open switch is associated with a group of normally closed switches. In this model simplifications have been introduced to reduce computational time and restrictions were made to exclude solutions that do not supply energy to any load point of the system. To check violation of the voltage and loading criteria a study of power flow for the ten best solutions is performed. Also for the ten best solutions a reliability evaluation using Monte Carlo sequential simulation is performed, where it is possible to obtain the probability distributions of the indices and thus calculate the risk of paying penalty due to not meeting the goals. Finally, the methodology is applied in a real Brazilian distribution network, and the results are discussed.

Studying Close Approaches for a Cloud of Particles Considering Atmospheric Drag

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Thermal Characteristics of Lignin Residue from Industrial Processes

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Manifesto Comunista: qual historicidade?

This article ask itself about the permanence of Marx and Engels’ Communist Manifest, demarking the text in its own time (1848), in the last Engels’ day’s life (1895), at the moment of the explosion of the German socialist revolution (1918) and today. !e conclusion is that this text remains current while it is necessary the theoretical and practice criticize of the capital.

Espacialidade e ativismo social na zona leste de São Paulo: o caso do Coletivo Dolores Boca Aberta Mecatrônica de Artes

Pós-graduação em Geografia - IGCE

Reconfiguração de sistemas de distribuição operando em vários níveis de demanda através de uma meta-heurística de busca em vizinhança variável

Pós-graduação em Engenharia Elétrica - FEIS

O campo da Ciência da Informação: contribuições, desafios e perspectivas da mineração de dados para o conhecimento pós-moderno

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Explosão de imagens no livro Películas, de Luís Miguel Nava

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Bacteriocinogenic LAB from cheeses - Application in biopreservation?

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Considerações sobre a morte e o luto na psicanálise

This paper presents the basic trends by which psychoanalytical thought understands the subject of death and mourning: the melancholic identification and the death instinct. The implications of these concepts to the comprehension of death and mourning are discussed, specially showing that the death instinct, differently than a wish to die, must be understood as a traumatic potentiality to the psychic apparatus, which needs to be bound and represented. In this sense, it is argued that the narcissist personality configurations in place on post-modernity lead to violence explosion on the field of culture. One of the results of this process can be traced in the lack of psychic elaboration work of mourning and death, which demonstrate the relevance of the definition of "wide-open death" as a social representation of death nowadays.