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The IEEE IMS Faculty Award recipient - The Automatic Measurement Systems course at the University of Cagliari
No full textThis paper is a description of the course on Automatic Measurement Systems (SAM), which is mandatory for the students pursuing the master’s degree in electronic engineering, known in Italy as Laurea Magistrale.
The University of Cagliari, Cagliari, Italy has offered SAM once a year since 2011. We highlight and discuss the course proposal and objectives and the enhancement of the course provided by the IEEE IMS Faculty Award
Robustness-oriented meter placement for Distribution Systems State Estimation in presence of network parameters uncertainty
No full textDistribution systems require ad hoc estimators, Distribution
System State Estimation (DSSE) techniques, to acquire
knowledge about the system status. An incorrect evaluation of
the accuracy of the DSSE creates decision risks in network
management. Possible variations in the network parameter
values, and decays of the metrological characteristics of the
measurement system elements are uncertainty sources very often
not considered. Considering these possible lacks of accuracy,
this paper focuses on the robustness of distributed measurement
systems aimed to obtain accurate DSSE results. The problem
of the proper assessment of the accuracy of the DSSE results
obtained through Weighted Least Squares (WLS) approach is
faced. A method capable of including different uncertainty
sources in the uncertainty estimation of a WLS approach is
presented. Furthermore, the paper proposes an optimal meter
placement algorithm robust with respect to possible malfunctions
in measurement system components. The results obtained on
a portion of an Italian distribution network, along with their
accuracy, are presented and discussed
Detrimental Effects of Capacitors in Distribution Networks in the Presence of Harmonic Pollution
No full textThe main goal of this paper is to analyze the behavior of an electric power network in the presence of harmonic distortion, when capacitors are installed. The work starts from a case study, where failure and malfunctioning of an industrial plant are described with the help of experimental measurements. The theoretical and mathematical details of the phenomena involved are analyzed by suitable computer simulations. The study is performed by considering some important electrical quantities, evaluated according to the definitions proposed by the standard IEEE 1459. The results put in evidence that using some typical quantities, such as the power factor, could lead to ambiguous conclusions in evaluating the actual "quality" of the loads, and this can assume special importance in virtue of the economic relevance of such quantities
Investigation on the accuracy of harmonic pollution metering techniques
No full textThe main goal of this paper is to investigate the robustness of some procedures recently proposed in the literature for harmonic pollution metering, in respect to the effects of the uncertainty sources present in the measurement chain. Both single point and multipoint methods are discussed. The research is based on computer simulations performed on an IEEE test system suitable for studies related to harmonics in power distribution networks. The estimate of the combined uncertainty affecting the measurement results is achieved by exploiting a Monte Carlo statistical approach. The results are discussed to highlight some important findings on the practical usability of these monitoring techniques
STIMA DELLE SORGENTI ARMONICHE PER LA LOCALIZZAZIONE DEI CARICHI DISTORCENTI NEI SISTEMI ELETTRICI DI DISTRIBUZIONE
No full text
On the Measurement of Power Quality Indexes for Harmonic Distorsion in the Presence of Capacitors”, IEEE Transactions on Instrumentation and Measurement
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