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The System Dynamics is a modeling tool that allows to represent and to understand the dynamic behavior of complex systems, presenting the linear and nonlinear relations between the variables. The dynamics of a system is generated by the feedback of information among the variables that compose it, over time this feedback can change the behavior of the system. Despite being widely used in the electrical...
This work presents the Failure Modes and Effects Analysis (FMEA) technique applied to an utility's power transformers to obtain a risk value to enable the optimization of a maintenance schedule. The application of the study will lead to greater assertiveness of the investments, providing technical and scientific support and agility in the decision making.
The distribution networks have been subjected to increased demand for electricity and the inclusion of distributed generation (DG), which have affected the voltage regulation. In this work, it is proposed a smart distribution transformer, which encompasses an electronic on-load tap changer and a communication system. In addition to the automatic or remote voltage regulation, the system enables to...
The use of an effective methodology for allocating remotely controlled switches is important for the utilities, since that procedure is closely related to the restoration time and consequently associated with reliability index. This kind of solution is not easy to deal with due to its multi-criteria, combinatorial nature and the difficult mathematical modelling. This paper deals with the developing...
This paper presents an analysis of the power purchase options for small-sized distributors in the Brazilian electricity sector. The analysis is based on the conditions provided for by industry legislation. Throughout the text, relevant topics are discussed to the understanding of the electricity market in Brazil, such as the current structure of the electricity sector, the Brazilian electrical system...
This paper presents the application of optimization methods for the synthesis of a linear array to operate in the frequency range of 4G technology in Brazil. The desired pattern shall exhibit squared-cosecant shape, so as to provide uniform distribution of power inside the base station cell and to reduce co-channel interference. Such an array is well suited to operate as a radio base station of mobile...
This paper presents the application of optimization methods for the synthesis of a linear array for radio base stations of mobile communications systems. The desired pattern shall exhibit squared-cosecant shape, so as to provide uniform distribution of power inside the base station cell and to reduce co-channel interference. The synthesis is performed by a combination of optimization methods: the...
The objective of this paper is to present a model of microgrid applied on a farm that cultivates rice, based on concepts of Integrated Resource Planning and Energy, and Smart Grids. Some intermediate steps to achieve this goal such as the characterization of the demand and supply sides and sizing of demand and energy resources could not be part of this contribution and are available in reference [1]...
Topological reconfiguration is an important tool for the planning and operation of electric power distribution systems. Usually, the utilities can use multiple criteria regarding the observation of regulation policies and public awareness to drive the topological reconfiguration. Several researchers are looking for new optimization methods, as the complexity of this combinatorial issue is high in...
Continuity in power supply for the consumers is a permanent concern from the utilities, pursued with the development of technological solutions in order to improve the performance of network restoration conditions. Using remotely controlled switches corresponds to one possible approach to reach such an improvement and gives some convenient remote resources, such as the fault detect, isolation, and...
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