Danilo S. Gastaldello

Management of Heating, Ventilation and Air Conditioning system for SHIM platform

Several approaches have been proposed according the concepts of smart grids and the smart home is one of them. A smart home can be defined as a system with network communication between all devices allowing the control, monitoring and remote access of the management system, progressing in a generalized way of all loads for an individual way, through individual management of loads. The paper proposes a Heating, Ventilation and Air Conditioning (HVAC) management methodology to be included in the Supervisor Control and Data Acquisition House Intelligent Management (SHIM). SHIM is a simulation platform developed and implemented in the Knowledge Engineering and Decision Support Research Center (GECAD) to support the control and management of appliances of end consumers. The main goal of the presented work is to develop a HVAC management methodology consisting in a priority system that classifies the importance of the HVAC in each instant. The priority classification depends directly on the difference between the room temperature and the user desired temperature, in order to take measures to optimize consumption during events with power consumption limitations maintaining user comfort.

Identification and feature selection of non-technical losses for industrial consumers using the software WEKA

This work has as objectives the implementation of a intelligent computational tool to identify the non-technical losses and to select its most relevant features, considering information from the database with industrial consumers profiles of a power company. The solution to this problem is not trivial and not of regional character, the minimization of non-technical loss represents the guarantee of investments in product quality and maintenance of power systems, introduced by a competitive environment after the period of privatization in the national scene. This work presents using the WEKA software to the proposed objective, comparing various classification techniques and optimization through intelligent algorithms, this way, can be possible to automate applications on Smart Grids.

Smart meters as a tool for energy efficiency

Gradually smart grids and smart meters are closer to the home consumers. Several countries has developed studies focused in the impacts arising from the introduction of these technologies and one of the main advantages are related to energy efficiency, observed through the awareness of the population on behalf of a more efficient consumption. These benefits are felt directly by consumers through the savings on electricity bills and also by the concessionaires through the minimization of losses in transmission and distribution, system stability, smaller loading during peak hours, among others. In this article two projects that demonstrate the potential energy savings through smart meters and smart grids are presented. The first performed in Korea, focusing on the installation of smart meters and the impact of use of user interfaces. The second performed in Portugal, focusing on the control of loads in a residence with distributed generation.

ESTUDO DE EFICIÊNCIA ENERGÉTICA DE UM SISTEMA CONVENCIONAL E DE UM SISTEMA HÍBRIDO PARA APLICAÇÃO NA ELETRIFICAÇÃO RURAL

O Programa Luz para Todos pretende, ate 2011, com o acesso a energia eletrica, trazer 12 milhoes de brasileiros do seculo 19 para o seculo 21 [1]. Paralelamente, a energia solar se apresenta, a cada dia, como alternativa de grande solucao energetica. E uma fonte inesgotavel, relativamente limpa e promove a total preservacao do meio ambiente, alem de atender a todas as pessoas de forma gratuita. Quando aplicada em conjunto com as acoes de acesso e infra-estrutura conjuga uma acao de eficiencia energetica [2]. Os sistemas de aquecedores solares inicialmente fabricados no Brasil tinham custos proibitivos e impediam o acesso das comunidades carentes a tecnologia. Entretanto, nos ultimos anos muitos fabricantes perceberam que essa tecnologia poderia ser estendida a um numero maior de consumidores se os custos se tornassem atraentes [3]. Dar acesso ao pequeno produtor rural a energia eletrica sem pensar na extensao rural dessa propriedade, com acoes que prestigiem a producao e a transformacao a partir da propriedade rural, cria falsas expectativas, ao se partir apenas do pressuposto de se obter um conforto humano momentâneo a que, entretanto, nao gera emprego e nao tras aumento da renda familiar. Logo, e bem possivel que passada a euforia inicial de ter luz eletrica em casa, e, ao aparecer um novo gasto que antes nao fazia parte do orcamento mensal da familia (custo mensal da energia), haja um significativo aumento do risco de perda de poder aquisitivo, pois o pequeno produtor passa a retirar da renda da propriedade, bem modesta ou quase nenhuma, recursos que em muitos casos sao representativos e que serao destinados ao pagamento da conta de energia a concessionaria [4] e [5]. Em consequencia, isto pode aumentar o empobrecimento desse consumidor e tornando-o inadimplente com a concessionaria e interrompendo o seu fornecimento de energia.