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access icon free Methodology to qualify marine electrical propulsion system architectures for platform supply vessels

© The Institution of Engineering and Technology
Received 08/10/2017, Accepted 29/11/2017, Revised 14/11/2017, Published 06/12/2017

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. , , and 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.

Inspec keywords: rectifiers; diesel engines; sulphur compounds; matrix algebra; electric propulsion; motor drives; busbars; energy consumption; brakes; air pollution; pulse transformers; power convertors; marine propulsion; failure analysis; bridge circuits; fuel economy; carbon compounds; diesel-electric generators; nitrogen compounds

Other keywords: DC distribution; equipment footprint reduction; emission reduction; AFE converter-based LVAC; emission factors; voltage 1000 V; LVDC; PSV application; voltage 3.3 kV; active front end converter-based LVAC; component failure data; AC distribution; MVDC; diode bridge rectifiers; marine electrical propulsion system architecture qualification; weight estimation; reliability assessment; multiple diesel generators; MVAC; voltage 5000 V; fuel consumption reduction; Pugh matrix; voltage 690 V; efficiency estimated; LVAC; low-voltage AC supply-based architecture; DIgSILENT Power Factory; diesel engine brake-specific FC data; FC reduction; multipulse transformers; thruster motor drives; volume estimation; platform supply vessel; busbars

Subjects: Reliability; Transportation; Pollution detection and control; Algebra; Transformers and reactors; AC-DC power convertors (rectifiers)

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