Alinhamento temporal de medições de tensão usando séries temporais de valores eficazes para suporte a medições de qualidade da energia

Abstract

Modernizing traditional power grids towards to the so-called Smart Grids (SG) is a strategic demand of global reach. To enable and guide this technological transformation, the implementation and development of so-called Advanced Metering Infrastructures (AMIs) is essential. In this context, this work is aligned with the transformation ahead, aiming to present relevant contributions to the advancement and consolidation of AMI technologies. The first contribution to be highlighted is the development of the RmsSync (RMS time-alignment synchronization technique) technique, a time-alignment approach based on calculations of RMS (Root Mean Square) values performed on the voltage cycles of the power grid. This technique can be used to determine the time alignment for nonsynchronized measurements, i. e., measurements obtained from equipment operating on non-synchronized clocks. This approach presents a solution to a significant demand in the field of measurements in electrical power plants, as it enables the continuity of energy measurement services, even in situations where the meters have lost, for whatever reason, the source of synchronization of their clocks, since the data can have its synchronism reconstituted. Additionally, the technique tends to have a lower application cost when compared to conventional approaches, such as the use of GPS, since it requires less infrastructure. Another relevant contribution of this work is the development of a scalable architectural model, integrating hardware and software in prototype form, which can serve as a basis for the development of new energy meters aligned with the AMIs vision, where the synchronization of measurements is provided by the application of the RmsSync technique. The prototype was tested under real measurement and sampling conditions, demonstrating the ability to perform voltage measurements in three-phase networks in a distributed configuration, covering several points of an electrical network simultaneously.