Realizzazione di un campione di potenza tramite una scheda di acquisizione dati commerciale

Prestazioni metrologiche delle pinze amperometriche in regime distorto

Caratterizzazione e modellizzazione di un sistema di comunicazione power line in media tensione

Modello di un sistema di comunicazione power line applicato alla rete di media tensione

Uncertainty evaluation in power measurements with commercial data acquisition boards

The paper deals with the metrological characterization of a digital wattmeter developed by using a personal computer, a shunt, two commercial data acquisition boards and commercial software. The uncertainty of the active power measurements is assessed individually characterizing the voltage channel, the current channel and the phase displacement measurement between the two channels. In particular, the uncertainty on the voltage and current rms measurements is evaluated by using an already proposed approach based on the Monte Carlo method and on the usage of five parameters, while the uncertainty on the phase angle is experimentally estimated. In order to validate the proposed approach for t…

Influence of Current Transformers on the Measurement of Harmonic Active Power

Nuova procedura di caratterizzazione dei trasformatori di corrente in regime distorto

A PC-based instrument for automatic monitoring and control of a CPVT power plant

A PC-based instrument has been developed for the monitoring and control of a concentrated photovoltaic and thermal (CPVT) power plant. The instrument allows acquiring both electrical and thermal quantities. Moreover it implements the solar tracking algorithm used to optimize the power production.

A set of indicators for arc faults detection based on low frequency harmonic analysis

In this paper a novel set of indicators is presented for arc faults detection in electrical circuits. The indicators are defined starting from an experimental characterization of the arc fault phenomenon and the study of the arcing current in several test conditions, which were chosen in accordance with the UL 1699 Standard requirements. The proposed parameters are measured by means of a high resolution low frequency spectral analysis of the arcing current, which allows to achieve a good spectral resolution even with short observation windows.