Refined Modeling and Compensation of Current Transformers Behavior for Line Parameters Estimation Based on Synchronized Measurements

Nowadays, in modern management and control applications, line parameters need to be known more accurately than in the past to achieve a reliable operation of the distribution grids. Phasor measurement units (PMUs) may improve line parameter estimation processes, but the accuracy of the result is affected by all the elements of the PMU-based measurement chain, in particular by the instrument transformers. Current transformers (CTs) are nonlinear and, therefore, their behavior is not easily described: their models cannot be straightforwardly included in the estimation problem. In this regard, this article refines modeling and compensation of CT systematic errors in line parameter estimation processes, based on different methods to describe the transformer behavior under various operating conditions. As the main result, the systematic errors of CTs are remarkably identified and mitigated. Moreover, the estimation of shunt susceptance values is significantly improved

Stochastic simulation of an aggregated model of the Italian economy: methodological and empirical aspects

Some results os stochastic simulation of a small Italian macroeconometric model are presented

Stochastic simulation of an aggregated model of the Italian economy: methodological and empirical aspects

Some results os stochastic simulation of a small Italian macroeconometric model are presented

Stochastic simulation of an aggregated model of the Italian economy: methodological and empirical aspects

Some results os stochastic simulation of a small Italian macroeconometric model are presented.Italian macroeconometric model, stochastic simulation

Linguistic adaptation and validation of Italian version of OSA-18, a quality of life questionnaire for evaluation of children with obstructive sleep apnea-hypopnea syndrome (OSAS).

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Analisi e simulazione stocastica di un modello aggregato dell'economia italiana 1952-1971

Experiments of stochastic simulation on a macro model of the Italian economy; this paper describes the first results produced by the research team

Analysis and stochastic simulation of a macro model of the Italian economy 1952-1971

Experiments of stochastic simulation on a macro model of the Italian economy; this paper describes the first results produced by the research team.Stochastic simulation; macroeconometric model

Abandonment of timber harvesting favours European beech over silver fir: evidence from Val Tovanella Nature Reserve in the southern Dolomites (Northern Italy)

Historical data from forest management plans have the potential to shed light on changes driven by either the application or the abandonment of forestry practices. This information coupled with recent data allows temporal comparisons to be made between surveys at the same location. Here we present the temporal comparison of two forest compartments located in Val Tovanella (Oriented Nature Reserve [Riserva Naturale Orientata] and Site of Community Importance) in the south-eastern Italian Alps for which full calipering was available for two years (1957 and 2010), the first of which came from a management plan by the renowned forest ecologist Lucio Susmel (1914\u20132006). Both compartments currently host mixed silver fir, Norway spruce and beech stands, and have not been managed since 1948; but one was historically a high forest, whereas the other was an open wooded pasture. We aimed to reconstruct the changes in volume, number of stems and diameter classes for the two compartments by comparing species proportions and their changes over time. In both compartments, species composition changed. In general, a decrease in compositional importance of silver fir and an increase in beech were observed. Furthermore, in one compartment, Norway spruce showed a large increase. Volumetric changes confirmed such trends and highlighted a shift towards larger diameter classes. We conclude that the abandonment of traditional forest activities and, in particular, the avoidance of tending and coppicing activities are major factors favouring beech at the expense of silver fir in the study area. Traditional planning and inventory methods can help to understand long-term changes in forest structure and the effects of forestry in light of current scenarios of land-use and climate change in protected areas