1,721,047 research outputs found
Power Grid Waveform Analysis: Demonstration Test Report
No full textGalileo Research & Development Activities Third Call - HARRISON Project - Work Package Final Repor
A Methodology of Functional and Reliability Requirements Definition for Uninterruptible Power System Design Following ISO 9000 Recommendations
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Designing criteria for selectivity and reliability of building power systems
No full textIn this paper several specific aspects of power system design are analysed, such as sizing, the selection of protective devices and coordination, by correlating them with a number of general power system features, so as to obtain in a “natural” form high levels of reliability and selectivity. A power system general optimization process methodology is suggested, especially usable in all the cases in which the system's “architecture” is an actual project variable. It is shown how the maximum and minimum short circuit current values may be the main factors determining the selection of circuit ratings. During power system design the best procedure seems to be that which, from the short circuit level on the main switchboard, leads to a selection of circuit ratings also on the basis of the distances of estimated load sets. By iterating this procedure, the “architecture” of the system is adapted to the specific case
Power System Design Requirements in Presence of Large Clusters of Single Phase Non-Linear Loads
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Designing criteria for building power systems supplying distributed nonlinear loads
No full textIn commercial and istitutional buildings, the wider use of power electronics equipments, such as computer swicth-mode power supplies and compact fluorescent lights with electronic ballasts, can create many problems. These loads are generally single-phase with a 3th harmonic current that can be equal or more than 60%.
The aim of this paper is that of analyzing several specific aspects of power system design, such as: sizing of circuits; and the selection of type of circuits, by correlating them with this specific problem of distributed nonlinear load supply. The proposed criteria can be utilised both in a short-term action for resolution of specific problems, and in medium-tenn action for development of new optimization procedures of power system design
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