Papers by Mauro José da Rosa
A Eja e as Perspectivas De Uma Inclusão Social
Identidade e Cidadania - Subprojeto De Pedagogia Pibid Eja Univali
Revista Brasileira de Educação e Saúde, 2016
Cinema e educação: O uso do filme 'Os delírios de consumo de Becky Bloom' para introduzir o conte... more Cinema e educação: O uso do filme 'Os delírios de consumo de Becky Bloom' para introduzir o conteúdo de números inteiros Cinema and education: The use of the film 'The Consumer Delusions of Becky Bloom' to introduce the contents of whole numbers
From the power systems perspective, the world has experienced dramatic changes over the past few ... more From the power systems perspective, the world has experienced dramatic changes over the past few years. Global climate warnings associated with economic progress and other factors have led the power systems to undergo changes, mainly affecting the way they are designed, planned, operated and managed. A significant amount of activity is underway on the technological, policy and economic fronts, which necessarily affects the entire electric power sector. Investments in research and development (R&D) have been the solution to mitigate the technological and policy risks of these changes and have attracted market capital to the power system industry. One of the first areas affected by these changes is the power systems analysis area, which requires the ability of a set of simulation tools to represent the changes associated with the technological front, such as wind and solar power energy penetrations, and/or analysis of policy impacts (e.g. maintenance schedule of large equipment in the open market energy). This thesis has explored new ways for power system analyses through the use of agentbased technology. First, the research work discusses the development of a Multi-Agent Systems (MAS) technology-based platform with potential applications in management and simulation processes in power systems. In order to explore some of the features of MAS, a new methodology is proposed to assess power systems reliability based on the Monte Carlo simulation (MCS), exploiting the benefits of the distributed artificial intelligence area and, mainly, the use of the distributed capacity in two ways: building autonomous behaviors for the applications and mitigating computational effort. Through the use of this technology, it was possible to divide the MCS algorithm into distinct tasks and submit them to the agent processing. Two different approaches to solve reliability problems in generating capacity based on chronological MCS illustrate the potential of MAS in power systems reliability assessment. Second, the maintenance schedule generating units are discussed. Maintenance decisions in electricity markets are one of the most important strategic conflicts among power players. For instance, a generation company is a selfinterested entity that is responsible for its own risk-based level. On the other hand, for large equipment supplying many customers, it is the Transmission System Operator"s task to schedule the most suitable period for maintenance, thus preserving system reliability. This relationship is sometimes conflicting and can be seen as an obstacle to the generation companies maximizes profits, as well as to the transmission system operator, since it is Index INDEX Contents CHAPTER 1 ..
Computational System For Outage Causes Identification And Analysis For Assessment Of Distribution Systems Reliability Index
ABSTRACT
The power system analysis area has recently been challenged by the merge between the automotive a... more The power system analysis area has recently been challenged by the merge between the automotive and power industries and their combined objective to work towards a lowcarbon electrified transport economy. In order to study the hourly effects on the reliability of power systems, this paper first proposes a discussion of the risk methodologies and then a novel way of examining the probability distributions of the reliability indices based on a hybrid approach. The effects of the substantial use of renewable energy combined with the integration of electric vehicles will be discussed in relation to the IEEE test systems and a planning configuration of the Portuguese Generation System.
Knowledge discovery in databases of forced outage of distribution utilities
Sba Controle & Automação Sociedade Brasileira de Automatica
18th International Conference and Exhibition on Electricity Distribution (CIRED 2005), 2005
This paper describes a computational system to treat the forced outage events information cycle, ... more This paper describes a computational system to treat the forced outage events information cycle, from the field data acquisition to the reports generation, providing a tool to guiding operation and maintenance actions.
18th International Conference and Exhibition on Electricity Distribution (CIRED 2005), 2005
This paper describes a computational system based on mobile computing to help inspections routine... more This paper describes a computational system based on mobile computing to help inspections routines, replacing maps, schematics diagrams and others paper-based sources of information for an application with graphical capability. This application provides geo-referenced graphical representations of the network linked with the necessary equipment information, giving to the electrician an easy way to indicate the network conditions in a pen-based PDA
This paper presents a performance evaluation approach for electric power distribution systems con... more This paper presents a performance evaluation approach for electric power distribution systems considering aspects related with service adequacy and security, as well as islanded operation. In this approach, a Sequential Monte Carlo Simulation based procedure is applied to emulate the distribution system operation, as well as to calculate system and load point performance indices. Steady-state aspects are evaluated using AC power flow computations. Furthermore, frequency stability is assessed using dynamic simulation aiming at verifying the feasibility of islanded operation. Simulation results are presented for modified versions of the RBTS-Bus2-F1 test system. The results highlight the importance of including steady-state and dynamic analysis into the system performance evaluation, mainly in what regards the impact assessment of distributed generation on the distribution system operation.
IEEE Power and Energy Society General Meeting, 2011
− Due to the high penetration of renewable energy into the energy matrix of today's power network... more − Due to the high penetration of renewable energy into the energy matrix of today's power networks, the design of generating systems based only on static reserve assessment does not seem to be enough to guarantee the security of power system operation. From the wind power integration perspective, this energy source imposes additional requirements, mainly due to the inherent unpredictable characteristic of the wind. Besides the uncertainties in load and generating unit availabilities, the operating reserve needs also to deal with the fluctuation characteristic of the wind power. Therefore, more flexibility of the conventional generators (hydro and thermal) is required to provide system support services. This paper discusses a new methodology based on chronological Monte Carlo simulation to evaluate the operating reserve requirements of generating systems with large amounts of renewable energy sources, in particular, wind power.
International Journal of Electrical Power and Energy Systems, 2014
Many applications of Fuzzy Power Flow have been proposed not only for operational purposes consid... more Many applications of Fuzzy Power Flow have been proposed not only for operational purposes considering uncertainties, but also for planning exercises with high level of intermittent sources, interconnection presence and, more recently, electric vehicles load. However, their use in real systems is not usual, mainly where the uncertainty level can be significant. This is due to the low accuracy of the results related to the classical methods, and the computational burden needed to achieve a high level of accuracy in the symmetric approaches. This paper aims to present a linearization of the Symmetric Fuzzy Power Flow in order to reduce the computational effort and make it possible for it to achieve high levels of accuracy when applied to real systems. With the purposes of demonstrating the applicability of the proposed approach, several IEEE test systems and a planning configuration of the Portuguese Transmission System will be studied.
2011 8th International Conference on the European Energy Market, EEM 11, 2011
The inevitable wind power forecast errors result in differences between forecasted and observed w... more The inevitable wind power forecast errors result in differences between forecasted and observed wind power. To mitigate their economic impact, combining the wind power with pumped hydro energy storage may be used. In order to deliver a joint operational strategy for a wind power plant combined with storage, one requires reliable wind power forecasts. The forecasts commonly only consist of a single-value forecast (point forecast) for each look-ahead time. However, additional representative information concerning the forecast uncertainty may be required. In this paper, the influence of uncertainty representation daily operation for a wind power plant combined with pumped hydro storage is discussed. The paper illustrates how uncertainty representations such as Gaussian uncorrelated errors may also not be satisfactory. Based on a case study with a wind power plant combined with pumped hydro storage, organized for illustrative purposes, the paper demonstrates the need to have uncertainty representation including cross-period dependencies, in order to define a correct operation policy.
2011 IEEE PES Trondheim PowerTech: The Power of Technology for a Sustainable Society, POWERTECH 2011, 2011
This paper presents a generation adequacy evaluation based on analytical calculation, considering... more This paper presents a generation adequacy evaluation based on analytical calculation, considering electric vehicles. The scenarios used are exploring electric vehicles penetrations in six different European countries, in order to assess their impact on the security of supply. An analytical method is developed to perform this evaluation. Afterwards, a discussion about the accuracy of this methodology is done and the differences between this approach and a flexible Sequential Monte Carlo Simulation are identified.
2011 8th International Conference on the European Energy Market, EEM 11, 2011
In order to deal with the power fluctuations that come from wind uncertainties, this paper presen... more In order to deal with the power fluctuations that come from wind uncertainties, this paper presents a generating reliability assessment of the real generation system of Bosnia and Herzegovina (BH) including wind power as an planning exercise for a given horizon. For this purposes, the sequential Monte Carlo simulation is used not only to assess conventional reliability indices as loss of load probability, loss of load expectation, loss of load frequency, and loss of load duration, but also to discuss an alternative measure of risk-based level called Well-being Analysis.
International Journal of Electrical Power and Energy Systems, 2012
This paper discusses the development of a Multi-Agent Systems (MAS) technology-based platform wit... more This paper discusses the development of a Multi-Agent Systems (MAS) technology-based platform with potential applications in management and simulation processes in power systems. In order to explore some of the features of MAS, a new methodology is proposed to assess power systems reliability based on Monte Carlo simulation (MCS), exploiting the benefits of the distributed artificial intelligence area and, mainly, the use of the distributed capacity in two ways: building autonomous behaviors to the applications and mitigating computational effort. Through the use of this technology, it was possible to divide the MCS algorithm into distinct tasks and submit them to the agents' processing. Two different approaches to solve generating capacity reliability problems based on chronological MCS illustrate the potential of MAS in power systems reliability assessment.
Saúde e Sociedade, 2010
Este artigo explora a técnica de Descoberta de Conhecimento em Base de Dados (Knowledge Discovery... more Este artigo explora a técnica de Descoberta de Conhecimento em Base de Dados (Knowledge Discovery in Databases - KDD) com o objetivo de qualificar a informação recolhida durante os trabalhos de recomposição de sistemas de distribuição por equipes de eletricistas. Esta qualificação possibilita a utilização de técnicas de Inteligência Artificial (IA) para apoiar decisões de investimentos em planejamento, operação e manutenção de sistemas de distribuição. Com o objetivo de ilustrar a importância dessa qualificação, este artigo apresenta, adicionalmente, a utilização dos resultados da aplicação de KDD para o treinamento de uma Rede Bayseana (RB). A meta principal da RB é auxiliar no diagnóstico de desempenho das redes elétricas, promovendo uma identificação indireta de causas de desligamentos forçados. A análise dos dados coletados durante uma interrupção forçada de energia elétrica indica que o principal objetivo dos eletricistas em campo é a rápida recomposição da rede e, por muitas v...
International Journal of Electrical Power & Energy Systems, 2009
This paper presents an application of probabilistic methodologies to evaluate the reserve require... more This paper presents an application of probabilistic methodologies to evaluate the reserve requirements of generating systems with large amounts of renewable energy sources. The idea is to investigate the behavior of reliability indices, including those from the well-being analysis, when the major portion of the renewable sources comes from the wind power. Renewable in this work mainly comprises hydroelectric, minihydroelectric and wind power sources. Case studies on configurations of the Portuguese and Spanish generating systems are presented and discussed.
Sba: Controle & Automação Sociedade Brasileira de Automatica, 2006
O objetivo deste artigo é discutir a utilização de um conjunto de tecnologias de computação móvel... more O objetivo deste artigo é discutir a utilização de um conjunto de tecnologias de computação móvel (Mobile Computing) para auxílio nas rotinas de planejamento da operação e manutenção de sistemas de distribuição de energia elétrica. Apresenta-se um resumo das principais tecnologias, discutindo-se definições, serviços e aplicações em potencial na área de sistemas de energia. Para ilustrar o artigo é apresentado um caso de utilização prática da tecnologia de Personal Digital Assistant - PDA, para coleta e validação de dados de eventos não programados em sistemas de distribuição, um sistema para auxílio de rotinas de inspeção e manutenção em redes de distribuição e um sistema de comunicação de dados via telefonia celular para uma pequena central hidrelétrica.
2011 2nd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies, 2011
It is proposed in this paper a methodology to consider the effects of DG penetration in planning.... more It is proposed in this paper a methodology to consider the effects of DG penetration in planning. Since DG presents potential to defer investments in network, it is evaluated the DG impact on grid capacity. A multi-objective optimization tool, using the meta-heuristic MEPSO, is used supporting an alternative approach to exploit the Pareto front features. Tests in distinct conditions were performed with two well-known distribution networks: IEEE-34 and IEEE-123. The results combined minimization and maximization in order to produce different Pareto fronts and determine the extent of impact caused by DG. The analysis gives important information, especially identifying futures to be considered in planning, where future means a set of realizations of all uncertainties. MEPSO also presented satisfactory performance in obtaining the Pareto fronts.
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Papers by Mauro José da Rosa