Conventional diesel-electric propulsion systems in platform supply vessels (PSVs) use low-voltage AC (LVAC) supply-based architecture with multiple diesel-generators feeding busbars at 690 V, 60 Hz. The busbars distribute power to thruster motor drives via multi-pulse transformers and diode bridge rectifiers. Advancements in electrical power conversion and distribution technologies offer possibilities of AC or DC distribution at low/medium voltage (LV/MV) for reduced fuel consumption (FC), emissions, and equipment footprint. This study presents methodology to qualify propulsion system architecture for PSV application. Potential architectures, besides conventional one, are active front end (AFE) converter-based LVAC (690 V), MVAC (3.3 kV), LVDC (1000 V), and MVDC (5000 V). Performances of these architectures are assessed quantitatively based on FC, emissions, weight, volume, efficiency, and reliability. FC is estimated based on brake-specific FC data of diesel engine. ${\rm N}{\rm O}_x$, ${\rm S}{\rm O}_2$, and ${\rm C}{\rm O}_2$ emissions are assessed based on their emission factors. The weight, volume, and efficiency are estimated based on parameters of individual components. Reliability is assessed based on component failure data using DIgSILENT Power Factory. The architectures are ranked based on performance parameters using a Pugh matrix. The most suitable architecture for the target PSV is LVDC, followed by MVDC, LVAC with AFE, MVAC, and conventional LVAC.
Methodology to qualify marine electrical propulsion system architectures for platform supply vessels
IET Electrical Systems in Transportation ; 8 , 2 ; 152-165
2018-01-29
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
voltage 5000 V , electric propulsion , multipulse transformers , weight estimation , active front end converter-based LVAC , voltage 3.3 kV , energy consumption , MVDC , emission reduction , multiple diesel generators , matrix algebra , fuel economy , FC reduction , carbon compounds , diesel-electric generators , AFE converter-based LVAC , LVDC , busbars , thruster motor drives , AC distribution , PSV application , failure analysis , nitrogen compounds , pulse transformers , component failure data , diesel engine brake-specific FC data , brakes , marine electrical propulsion system architecture qualification , air pollution , voltage 690 V , sulphur compounds , equipment footprint reduction , volume estimation , motor drives , MVAC , efficiency estimated , platform supply vessel , diode bridge rectifiers , DC distribution , low-voltage AC supply-based architecture , diesel engines , rectifiers , bridge circuits , LVAC , reliability assessment , fuel consumption reduction , voltage 1000 V , DIgSILENT Power Factory , power convertors , emission factors , marine propulsion , Pugh matrix
Metadata by IET is licensed under CC BY 3.0
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