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1
Content available remote Fuel Cell Analytical Modeling: solving the trade-off between accuracy and complexity
Boscaino V., Miceli R., Capponi G., Galluzzo G. R., Rizzo R.
Przegląd Elektrotechniczny
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2013
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R. 89, nr 11
220-224
EN
In this paper, a 5.5 kW Proton Exchange Membrane fuel cell is modeled. The proposed analytical model is described and the parameters identification procedure is further discussed. Simulation results of all three sub-models are compared to test the accuracy of each one. A comparison between simulation and experimental results is provided as well validating the modeling approach.
PL
W pracy przedstawiono model 5.5 kW baterii pracującej na zasadzie membrany protonowej. Przedyskutowano model oraz parametry identyfikacyjne.
2
Content available remote Characteristic Impedance of Power Lines with Ground Wires
Rizzo R., Andreotti A., Pierno A., Assante D.
Przegląd Elektrotechniczny
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2013
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R. 89, nr 5
11-14
EN
In the paper the characteristic impedance of a power line equipped with shield wires is analysed. The solution to the problem is found by means of a non-symmetric algebraic Riccati equation. Solutions are presented for practical line configurations.
PL
W artykule przedstawiono analizę impedancji charakterystycznej linii elektroenergetycznej z ekranowanymi kablami w praktycznym zastosowaniu konfiguracyjnym. W analizie wykorzystano niesymetryczne równanie Riccatiego.
3
Content available remote Lightning induced effects on lossy multiconductor power lines with ground wires and non-linear loads - Part I: model
Andreotti A., Del Pizzo A., Rizzo R., Verolino L.
Przegląd Elektrotechniczny
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2012
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R. 88, nr 9b
301-304
EN
In the paper, which is a companion paper of part II: simulation results and experimental validation, we will present a model for the calculation of induced voltages produced by indirect lightning on multiconductor power lines. In particular, the case of power lines with ground wires terminated on non-linear loads is studied. The power line is represented by an equivalent time domain m-port, and the effects of the lightning excitation are represented through equivalent independent sources. This equivalent time-domain circuit allows treating easily non-linear terminations such as surge arresters.
PL
W artykule zaprezentowano model obliczeń napięć indukowanych podczas nie bezpośredniego wyładowania na wieloprzewodową linię zasilania. Uwzględniono przewód uziemiony podłączony do nieliniowego obciążenia.
4
Content available remote Lightning induced effects on lossy multiconductor power lines with ground wires and non-linear loads - Part II: simulation results and experimental validation
Rizzo R., Andreotti A., Del Pizzo A., Verolino L.
Przegląd Elektrotechniczny
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2012
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R. 88, nr 9b
305-308
EN
Using the procedure and the model analysed in the companion paper part I: model, in this paper simulations are carried out in order to evaluate the overvoltages produced on a multiconductor line. In particular, the shielding effect produced by ground wires and the role of surge arresters are investigated. The model has also been validated using experimental results.
PL
W artykule zaprezentowano model obliczeń napięć indukowanych podczas nie bezpośredniego wyładowania na wieloprzewodową linię zasilania. Uwzględniono przewód uziemiony podłączony do nieliniowego obciążenia.
5
Content available remote A Comparison between Line-Start Synchronous Machines and Induction Machines in Distributed Generation
Rizzo R., Piegari L., Tricolo P.
Przegląd Elektrotechniczny
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2012
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R. 88, nr 5b
187-193
EN
The phenomenon of the self-synchronisation in line-start synchronous machines can be suitably used in distributed generation plants. With a simple control equipment based on contactors, it is possible to overcome the restrictions imposed to the synchronous generators in some countries. The paper shows that synchronous machines can be suitable also when both stand-alone and grid-connected operations are involved. The paper reports finally a comparison with an equivalent system based on induction machines by means of experimental tests on sample test benches with the target to put in evidence the different characteristics of the two plant typologies.
PL
W artykule wykazano że generator synchroniczny może być z powodzeniem użyty jako jednostka samodzielna i w lokalnej sieci. Porównano dwie sieci – z generatorami synchronicznymi i indukcyjnymi.
6
Content available CER telegeomatics applications and projects in Central Europe
Manzoni G., Bolzon G., Cefalo R., Gherdevic D., Martinolli S., Piemonte A., Rizzo R., Sluga T.
Reports on Geodesy
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2006
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z. 2/77
273-281
EN
Applications and Projects of the Centre of Excellence in TeleGeomatics, University of Trieste, are herein reported, in particular as far as regards the Interreg SISA (Survey and Information System of Adriatic Roads) Project. The new instruments and devices of MMS used for the surveys are described together with the obtained results and accuracies. Moreover the results of laser scanner surveys from the Mobile Mapping Systems are presented and compared to another more accurate system. Future developments and application are presented linking together different techniques and methodologies for real time surveys, in particular with the use of WADGPS techniques also through InterNet (SISNeT ESA Project), with a software developed at the Laboratory oC Topogra.phy and GIS, Department of Civil and Environmental Engineering.
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