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This paper presents the development and application of methods to estimate and reduction energy losses in active distribution system with the support of smart grids technologies. Technical and nontechnical losses are accurate estimated using energy balance and power flow analysis. In technical losses reduction perspective, a heuristic volt/var control (VVC) strategy is considered. The optimization technique employed in VVC allows reaching the optimized solution through a reduced combinatorial analysis and computational intensity, once explores only the calculus of potential solutions of the problem. The space of search is define according to the effectiveness of control equipment in technical loss minimization, being able to acts on the adjustment of conventional and electronics control devices. The methods consider real data of measurement and grid parameters given by Supervisory Control and Data Acquisition (SCADA) and Geographic Information Systems (GIS) and the historical billing of energy utility. Two real distribution feeder are used to assess the robustness of proposed methodologies. The control variable considered in the optimized process are based on available control devices on those feeders and comprise TAP position of voltage regulators, reactive power inject by the capacitor banks and power factor variation in smart inverters used in grid-connected distributed generation. The experimental analyzes conducted in this paper showed promisor results, detecting the occurrence of abnormal nontechnical losses and optimizing the technical losses value in relation to a traditional scheme control. [ABSTRACT FROM AUTHOR]

This has been the main conference sponsored biannually by the Brazilian Society of Automatics (Sociedade Brasileira de Automática SBA) since 1976, as is presented in the historic review "Celebrating 45 Years of the Brazilian Society of Automatics" the first paper of this special issue. This special issue is the first devoted to invited papers presented at the Brazilian Congress of Automatics (XXIII Congresso Brasileiro de Automática CBA 2020). [Extracted from the article]