| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 3.04 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
As diferenças construtivas entre os conversores eletrônicos de potência faz com que esses
equipamentos apresentem diferentes eficiências. Esse fato, em conjunto com o aumento
no uso desses conversores, para conectar com cargas, geração e armazenamento baseados
em outras tecnologias, como a corrente contínua ou sistemas em corrente alternada
desacoplados, faz com que seja útil uma análise para reavaliar as redes de distribuição,
buscando encontrar a melhor solução para o cenário atual.
O estudo compara as tecnologias em três vertentes. A avaliação das capacidades de
transmissão das arquiteturas utiliza a queda de tensão e a corrente máxima dos condutores
para comparar diversas arquiteturas em redes de distribuição, com isso é possível notar
que, para certas tensões, redes em corrente contínua apresentam melhor capacidade de
transmissão do que as redes convencionais em corrente alternada.
O estudo de perdas avaliou, com o auxílio de dados empíricos obtidos na literatura,
as perdas de conversão causadas pela conexão da rede com as cargas, a geração e o armazenamento.
Os resultados obtidos demonstraram que, com a exceção do transformador
para conexão da rede com a subtransmissão, o uso de redes em corrente contínua resulta
em menos perdas para o sistema.
Por último, utilizando as tarifas de energia de diversos países, foi feito um estudo
econômico, permitindo avaliar o custo anual, com cada arquitetura, para o consumidor.
O estudo apresentou uma economia com o uso de redes em corrente contínua, sendo essa
ainda maior caso a rede possua geração e armazenamento.
The constructive differences between the power electronic converters means that these devices present different efficiencies. This fact, coupled with the increse in use of these converters, for connection to loads, generation and storage based on other technologies, such as direct current, or uncoupled alternating current systems, makes useful an analysis to reevaluate the distribution networks, seeking the best solution for the current scenario. The study compares the technologies in three branches. The transmission capacity of the architectures uses the voltage drop and the maximum current of the conductors to compare several architectures for distribuiton networks, with it, it is possible to notice that, for certain voltages, direct current present a better transmission capacity that the convetional alternating current networks. The loss study evaluated, with the aid of empirical data from the literature, the conversion losses, caused by the connection of the grid to the loads, the generation and the storage. The results obained showed that, with the exception of the transformers used to connect the network to the subtransmission grid, the use of direct current results in fewer losses to the system. Lastly, using the energy prices from several countries, an economical study was developed, allowing the evaluation of the annual cost, with each architecture, to the consumer. The study presented an economy with the use of direct current networks, this being even larger if the network contains generation and storage.
The constructive differences between the power electronic converters means that these devices present different efficiencies. This fact, coupled with the increse in use of these converters, for connection to loads, generation and storage based on other technologies, such as direct current, or uncoupled alternating current systems, makes useful an analysis to reevaluate the distribution networks, seeking the best solution for the current scenario. The study compares the technologies in three branches. The transmission capacity of the architectures uses the voltage drop and the maximum current of the conductors to compare several architectures for distribuiton networks, with it, it is possible to notice that, for certain voltages, direct current present a better transmission capacity that the convetional alternating current networks. The loss study evaluated, with the aid of empirical data from the literature, the conversion losses, caused by the connection of the grid to the loads, the generation and the storage. The results obained showed that, with the exception of the transformers used to connect the network to the subtransmission grid, the use of direct current results in fewer losses to the system. Lastly, using the energy prices from several countries, an economical study was developed, allowing the evaluation of the annual cost, with each architecture, to the consumer. The study presented an economy with the use of direct current networks, this being even larger if the network contains generation and storage.
Description
Mestrado de dupla diplomação com o Centro Federal de Educação Tecnológica Celso Suckow da Fonseca - Cefet/RJ
Keywords
Corrente alternada Corrente contínua Microrede Eletrônica de potência