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In this work, the algorithms Exact Model Order Estimation of Signal Parameters via Rotational Invariance (EMO-ESPRIT) and Sliding-Window Exact Model Order-ESPRIT (SW-EMO-ESPRIT) are analyzed in order to detect the frequency components of a distorted signal in the 2-500 kHz frequency range, with the aim of providing a possible measurement solution effective for all-over the frequency range of interest. Indeed, some standards, like IEC 61000-4-7 and IEC 61000-4-30, deal with measurement methods which are suitable for only part of that frequency range (e.g., IEC 61000-4-7: 2-9 kHz and IEC 61000-4-30: 2-150 kHz), and suggest to apply FFT algorithm on a measured rectangular window with 200 ms duration (50/60 Hz power systems). The previously mentioned methods and the method suggested by the standards are tested here on both simulated synthetic signals and experimental measured signals and the obtained results are then compared to find their "pros and cons".

Abstract. In this paper, self-tuning Kalman Filter (KF) is applied to a significant sample of full waveforms associated to the voltage dips monitored in the Italian distribution network by the QuEEN system, with the aim of events detection and waveforms segmentation. Segmentation is done in order to extract more features and information from the original voltage waveforms, to make easier voltage dips classification, based on the events source location (upstream/downstream from the point of measurement). The aforementioned classification is achieved by Machine Learning algorithms. The evaluation of the obtained results is based on the computation of a "confusion matrix".

This paper proposes the optimized design of a wireless energy harvesting device (EHD), by means of a recently developed evolutionary optimization method. This procedure is developed in order to increase the transfer efficiency and the robustness of the coupling, with the aim of minimizing the average power loss, and to increase the lifetime of a wireless sensor network by scavenging RF energy available in the environment.

The goal of this work is to present and discuss two methods to effectively represent the MTL modelling the 2 #x00D7;25 kV #x2013;50 Hz AC high speed railway system with a reduced number of conductors. The obtained models are used to evaluate the EM induced disturbances on the track circuits caused by trains harmonic current injection and the numerical results are reported and discussed