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Today the number of phones in the world are more than five billion. With these devices a big wireless network can be considered. In the last generation of phone there are a subset called smartphone, the use of this subset is growing. These devices are more and more sophisticated, capable of measuring many parameters from environment. In order to do that this smartphone is equipped with a several sensors...
As the distribution grids are an important part of the electrical system, their components need to be known in order to achieve optimal control of energy transfer. The present paper considers one component of the distribution grid namely the power line, aerial or cable, its model parameters leading to pseudo measurement uncertainties that can propagate through the entire grid when, for example, state...
Individual monitoring of the battery state of charge is especially interesting in applications where several units are used for powering complex systems. In these applications the identification of failures or evidences of failures makes the control more robust, featuring a predictive maintenance of the power system. This article shows the results of a developed system for monitoring parameters that...
The correct behavior of control and protection schemes is basically determined by the availability of accurate information on the system status. For economical reasons the distribution networks are just partially monitored networks. The few real measurements and all the a priori data provide information for distribution system state estimation (DSSE) techniques. An incorrect evaluation of the accuracy...
The real-time, high-accuracy measurement of electrical waveform phasors is one of the many open challenges that need to be tackled in future smart grids. In this paper, the accuracy of three well-known synchrophasor estimators based on the single-cycle Discrete Fourier Transform (DFT) is evaluated under the effect of static frequency offsets, amplitude modulation and phase modulation. Compared with...
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