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Power quality is a key issue in islanded electric power systems. Considering the intrinsic weakness of islanded grids, this paramount aspect is not of easy accomplishment. To fulfill power quality requirements in these weak electric systems, high performance voltage and frequency controls are needed, although the interactions between these controls can lead to stability issues. In particular, frequency...
Ensuring system stability in medium-voltage DC (MVDC) integrated power systems (IPS) is a key issue, due to the presence of many shipboard electric users fed by constant power load (CPL) converters. This paper presents an innovative control system aimed at utilizing alternators, connected to the IPS through controlled AC-DC interface converters, to improve MVDC stable voltage control. Such system...
The paper presents a small-signal stability analysis of voltage control systems employed onboard all-electric cruise liners. To realize the stability analysis, a model of shipboard power station voltage control system has been determined, moving from dynamic models of alternators, voltage regulators and loads. Reduced order models of alternators have been utilized, to simplify at best the analysis...
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